JP2018017698A - Method for monitoring pipe state in installing pipe underground - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for monitoring a pipe state in installing the pipe underground, the method capable of continuously confirming a position of the pipe during jacking work while performing the jacking work efficiently.SOLUTION: A method for monitoring a pipe state in installing the pipe uses a pipe installation device 1 that installs pipes 2, 2... underground by excavating natural ground 10A using a rotary excavation body 10, and meanwhile, pressing the rotary excavation body from the rear with a jacking device 5 and thereby jacking the pipes successively joined in the rear of the rotary excavation body. In the method, an inclination sensor (inclination detection means) X2 for detecting an inclination angle of the pipe is mounted on a leading pipe 2A joined to the rotary excavation body, the inclination detection means for detecting an inclination angle of the pipe is mounted on one or more succeeding pipes among succeeding pipes 2B, 2B... successively joined to the rear of the leading pipe, and on the basis of an actual value continuously measured by each inclination detection means during jacking of the pipes, a state of the pipes during jacking in the underground is monitored.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pipe state monitoring method capable of improving the efficiency of propulsion work and continuously checking the position of the pipe when the pipe is installed in the ground.

  In order to confirm the position of the tube in the ground when the tube is installed in the ground, for example, a method using a measuring instrument including a laser projector, a target, and a monitoring camera is known (see Patent Document 1). ).

JP 2003-254750 A

According to the above-described method, since the measurement must be performed in a state in which the propulsion of the pipe is stopped and the propulsion work must be interrupted, there is a problem that the efficiency of the propulsion work is deteriorated. Further, if the measurement time interval is lengthened in order to suppress the deterioration of the efficiency of the propulsion work, the longer the measurement time interval, the more unclear the status of the pipes in between. That is, in this case, there is a problem that continuous monitoring cannot be performed during the propulsion of the pipe, and details of the state of the pipe being propelled cannot be understood.
The present invention provides a method for monitoring the state of a pipe when the pipe is installed in the ground, which can improve the efficiency of the propulsion work and can continuously check the position of the pipe during the propulsion work.

According to the present invention, a pipe installed in the ground by propelling a pipe sequentially added to the rear of the rotary excavator by pushing the rotary excavator from behind with a propulsion device while excavating a natural ground with the rotary excavator. A pipe state monitoring method for installing a pipe into the ground using an installation device, wherein a tilt detecting means for detecting the tilt angle of the pipe is attached to the leading pipe connected to the rotary excavation body, and the leading At least one of the succeeding pipes sequentially connected to the rear of the pipe is provided with an inclination detecting means for detecting the inclination angle of the pipe, and continuously measured by each inclination detecting means during the propulsion of the pipe. Because the state of the pipe being propelled in the ground is monitored based on the actual measured value, the efficiency of the propulsion work can be improved and the position of the pipe can be confirmed continuously during the propulsion work. .
Since the inclination detecting means for detecting the inclination angle of each pipe is attached to all the succeeding pipes sequentially connected behind the leading pipe, the position of each pipe can be confirmed continuously during the propulsion operation.
Based on the design positions of the first and subsequent pipes to be installed in the ground, the amount of propulsion from the entrance to the ground of the pipe into the ground of the pipe, and the measured value of the inclination angle measured by the inclination detection means Since the calculated actual measured positions of the leading pipe and the succeeding pipe are simultaneously displayed on the same display screen, the monitor visually indicates the deviation of the actual measured position of each pipe during the propulsion work from the design position. It becomes possible to grasp.
Since the amount of propulsion from the entrance to the natural ground of the tube to the underground of the tube was measured with a stroke meter, the amount of propulsion of the tube can be accurately measured.
Obtain the design evaluation value based on the design value of the inclination angle every time the leading pipe and the succeeding pipe to be installed in the ground are propelled for a certain distance, and incline every time the leading pipe and the succeeding pipe being propelled propel a certain distance. Since the measured evaluation value based on the measured values of the inclination angle of the leading pipe and the succeeding pipe obtained from the detection means is obtained, and the difference between the design evaluation value and the measured evaluation value of the leading pipe and the succeeding pipe is obtained and displayed on the display screen. The monitor can quantitatively grasp the deviation of the measured value of each pipe during the propulsion work with respect to the design value.
The design height of the pipe is calculated based on the standard and design value determined arbitrarily by the design evaluation value, and the pipe is calculated based on the standard determined by the measured evaluation value and the actual measured value of the inclination angle of the pipe. Therefore, it becomes possible to grasp the status of pipe promotion based on the height of the pipe propelled underground.
The pipe installation device includes a front pipe having a rectangular cross section, a rotary excavator that rotates on a rotation center line that is positioned in front of one end opening of the front pipe and intersects the propulsion direction of the front pipe, and an inner surface of the front pipe A support body supported on the base, a connecting strut portion whose base end side is connected to the support body and rotatably supports the rotary excavation body, and one pair of the rotary excavation body facing each other in the height direction of the top pipe According to the propulsion device, the oscillating drive means for driving the oscillating member in a direction orthogonal to the inner surface and the propulsion device that applies propulsive force to the leading pipe and the rotary excavation body via the support body. By controlling the driving force and the excavation direction by controlling the swing drive means, it becomes possible to reduce the deviation between the actual measurement position and design position of each pipe being propelled. Can be installed at a position close to the design position, So that the installation work can be realized.

The figure which shows the outline | summary of a pipe installation system. The perspective view which shows the pipe | tube with which the side wall was formed in trapezoid shape. The figure which shows the installation method of the pipe | tube in the ground. The figure which shows the display of the design position and measured position of each pipe | tube. (A) is a figure which shows the design position, measured value, and difference of the height of each pipe | tube displayed on the display screen, (b) is the design position, measured value, and difference of the inclination angle of each pipe | tube displayed on the display screen. FIG. The cross-sectional view of a pipe installation apparatus. The longitudinal cross-sectional view of a pipe installation apparatus. The perspective view which looked at the excavator from the front side. The perspective view which looked at the excavator from the front side. The enlarged view of the front side part of a pipe installation apparatus. Operation | movement explanatory drawing of a vertical swing drive means. The perspective view which shows the thrust transmission rod-shaped body provided with the buckling prevention member.

Embodiment The pipe state monitoring method when the pipe is installed in the ground according to the embodiment, when installing the pipe 2 in the ground using the pipe installation device 1 described later, that is, as shown in FIG. The excavator 10 pushes the rotary excavator 10 from behind while excavating the natural ground 10A by the rotary excavator 10, thereby propelling the pipes 2, 2. In the case of installation, an inclination sensor X2 as an inclination detecting means for detecting an inclination angle θ of the pipe 2 with respect to a horizontal plane is attached to all the pipes 2, 2. The underground is propelled by monitoring the underground state of each of the pipes 2, 2... Being propelled based on the measured values continuously measured by the respective inclination sensors X2, X2. Displacement between the actual measurement position and the design position in the ground of each tube 2, 2 ... Lest those that allows each tube 2,2 ... installation work of.

  As shown in FIG. 1, a pipe installation system X1 for realizing the pipe state monitoring method according to the first embodiment includes a pipe installation apparatus 1 for installing a plurality of pipes 2, 2,. The inclination sensors X2, X2,... Installed on the flat portions of the tubes 2, 2,... Installed in the ground by the installation device 1, and strokes as a propulsion amount measuring means for measuring the propulsion amount (propulsion distance) of the tubes 2. A total X3 and a state monitoring device X4 for monitoring the state of each of the pipes 2, 2.

  The pipe 2 installed in the underground 10 using the pipe installation device 1 is a pipe having a quadrangular section, and the center line (center axis) of the pipe (= (the center point of the cross section orthogonal to the extension direction of the pipe). A straight tube that has a square cross-section when the tube is cut along a plane orthogonal to the tube extension direction)) and that extends straight (the center line of the tube is a straight line) Or a curved pipe formed so as to bend and extend so as to draw an arc (a pipe whose center line is a curve).

  For example, as shown in FIG. 2, as a straight pipe, a pair of side walls 2a, 2a of the pipe 2 facing each other in parallel is formed into a congruent trapezoid, and the trapezoidal side edges 2s of the side wall 2a are parallel to each other. A pipe 2 having a trapezoidal side wall 2a in which 2s is parallel to the center line 2C of the pipe 2 is used. As the plurality of pipes 2 are sequentially connected to the rear of the rotary excavator 10 and installed in the ground, as shown in FIG. A bent tube 2W that is bent at a connecting portion between the rear end opening edge 2x and the front end opening edge 2y of the rear tube 2 (a line shape approximate to a curve) is installed in the ground.

  As shown in FIGS. 2 and 3A, the side wall 2a is formed as a trapezoidal tube 2. As shown in FIGS. The trapezoidal legs 2t, 2t and the trapezoidal top and bottom edges 2s, 2s are not perpendicular to each other. The pipe 2 can be manufactured easily and inexpensively by cutting the opening edges at both ends of a straight pipe having a rectangular side wall obliquely.

  The connecting portion between the rear end opening edge 2x of the front tube 2 and the front end opening edge 2y of the rear tube 2 is between the rear end opening edge 2x of the front tube 2 and the front end opening edge 2y of the rear tube 2. Through this, the pipe 2 is connected in a state where water does not flow inside and outside. That is, when the pipe 2 is installed in the ground 10 by the pipe installation device 1 described later, the rear end opening edge 2x that opens at the edge that is the other leg 2t of the pair of trapezoidal side walls 2a of the front pipe 2; By connecting the front end opening edge 2y that opens at the edge that is one leg 2t of the pair of trapezoidal side walls 2a of the rear pipe 2 by welding, the pipe 2, 2,. The travel locus 2Z is a line that bends at the connecting portion between the rear end opening edge 2x of the front tube 2 and the front end opening edge 2y of the rear tube 2. In other words, when two or more pipes 2 are connected, the center line (center axis) 2C of the pipe 2 extends so as to draw a fold curve that bends at the connecting portion (FIGS. 3B and 3C). The bent pipe 2W as shown in FIG. 2 is formed, and the bent pipe 2W is installed in the ground. The length of the other leg 2t of the pair of trapezoidal side walls 2a of the pipe 2 before being connected by the connecting portion and the length of one leg 2t of the pair of trapezoidal side walls 2a of the rear pipe 2 are the same. .

  It should be noted that the bending angle of the traveling locus 2Z (the bending angle of the bending curve forming the center line of the bent tube 2W) is the rear end opening edge 2x of the front tube 2 and the front end opening edge 2y of the rear tube 2. The angle between the leg 2t of the trapezoidal side wall 2a of the tube 2 and the edges 2s and 2s of the trapezoidal parallel upper and lower bases becomes gentler as it approaches a right angle. The farther from the right angle, the steeper. In other words, as the angle formed becomes closer to a right angle, the angle formed between the center line 2C and the center line C that bends at the connecting portion becomes closer to 180 degrees, and as the formed angle becomes farther from the right angle, the center line 2C and the center line C bent at the connecting portion. The angle formed by is close to 90 degrees. Therefore, the angle α formed by the trapezoidal side wall 2a in the pipe 2 may be determined according to the planned progress trajectory of the pipe 2.

  Thus, by using the trapezoidal pipe 2 with the side wall 2a, it becomes possible to install the bent pipe 2W (see FIG. 1) that bends and extends in the ground. That is, the rear end opening edge 2x opening at the edge which is the other leg 2t of the pair of trapezoidal side walls 2a of the front tube 2 and the one leg 2t of the pair of trapezoidal side walls 2a of the rear tube 2 By connecting the front end opening edge 2y that opens at a certain edge by welding, it is possible to form a bent pipe 2W that extends so as to draw a folding line in which the center line of the pipe is bent at the connecting portion.

As shown in FIG. 1, the inclination sensor X2 includes all the pipes 2, 2... Installed in the ground, that is, a head pipe 2A to be described later and all subsequent pipes 2B, which are sequentially connected to the rear of the head pipe 2A. 2B...
The inclination sensor X2 is attached to a reference flat portion provided in each of the tubes 2, 2,..., And when the flat portion is inclined when the tube 2 is installed in the ground, This is a sensor that measures the crossing angle, that is, the inclination angle θ of the tube 2 that is the traveling direction angle of the tube 2 with respect to the horizontal plane.
For example, the inclination sensor X2 is attached to a flat surface portion that is an inner surface of an upper plate 2u (see FIG. 2) that connects the upper bottoms of the side walls 2a, 2a of the trapezoidal tube 2 with the side wall 2a.
As the tilt sensor X2, for example, a tilt sensor having a configuration in which half of two left and right electrodes of a semicircular shape are immersed in silicon oil is used. The tilt sensor can measure the tilt angle θ by taking advantage of the change in the area where the left and right electrodes are immersed in silicon oil when the sensor is tilted and taking out the change in the area as a change in capacitance. It is configured.

As shown in FIG. 1, the stroke meter X3 is sequentially connected to, for example, the pipe 2 (the front pipe 2A or the rear of the front pipe 2A) positioned in front of the entrance 301 serving as an entrance to the underground in the start pit 300. The succeeding pipes 2B, 2B...) Enter the ground from the start guide table 200B via a hydraulic cylinder (propulsion jack (protruding jack)) 200A as a propulsion drive source of the propulsion device 5 described later and a propulsive force transmission means 200 described later. It is a displacement meter that measures the amount of movement (displacement) of the tube 2 when pushed.
As the stroke meter X3, for example, a wire type stroke meter that measures the moving distance of the piston of the hydraulic cylinder 200A by the amount of wire drawn is used.
For example, after the pipe 2 positioned in front of the entrance 301 enters the ground through the entrance 301 and before the next pipe 2 is connected to the rear end of the pipe 2, the entrance 301 enters the ground. Propulsion of the pipe 2 that has entered the ground from the entrance 301 by measuring the propulsion amount of the pipe 2 being made a plurality of times within the measurement range of the stroke meter X3 and accumulating (totaling) the measured movement amount The total of the propulsion amounts of the plurality of pipes 2 already installed in the ground is obtained by (number of pipes) installed in the ground × (total length of one pipe). That is, in this case, the total propulsion amount of the pipes 2, 2... Pushed into the ground from the start guide 200B is already installed in the ground (the number of pipes 2) × (the total length of one pipe 2). And the propulsion amount of the pipe 2 in the middle of entering the ground from the entrance 301 measured by the stroke meter X3. Thus, since the propulsion amount from the entrance to the natural ground of the pipe 2 to the underground of the pipe 2 is measured by the stroke meter X3, the propulsion amount of the pipe 2 can be accurately measured.
Each time the pipe 2 positioned in front of the entrance 301 is pressed, the movement amount of the piston of the hydraulic cylinder 200A is measured within the measurement range of the stroke meter X3, and all the measured pipes 2, 2,. The total of the amount of propulsion of the pipe 2 from the entrance 301 propelled underground to the top pipe 2A may be obtained by accumulating (totaling) the amount of movement.

The state monitoring device X4 is configured by a computer that includes an actual measurement position calculation unit, a design position calculation unit, a difference calculation unit, and a display unit that are not shown.
As shown in FIG. 1, the state monitoring device X4 is installed in a monitoring room X40.

The actual measurement position calculation means, the design position calculation means, and the difference calculation means are realized by a computer. That is, the design position calculation means, the actual measurement position calculation means, and the difference calculation means are configured by a program and computer hardware that performs processing according to the program procedure.
Moreover, the measured value measured by each inclination sensor X2, X2 ... and the stroke meter X3 is transmitted to state monitoring apparatus X4 (computer) via a wire or radio | wireless.

The actually measured position calculation means transmits the inclination angle transmitted at a predetermined time interval (for example, every 100 ms) from the inclination sensor X2 of the pipe 2 being actually propelled or the inclination sensors X2, X2. Based on the measured data of θ, the displacement amount Z of the center position in the height direction (hereinafter referred to as “tip center”) at the tip of the tube 2 or each of the plurality of tubes 2, 2. In addition, A is a constant (when all of the pipe 2 is not in the ground, the measured value (actual measurement data) of the propulsion amount of the pipe 2 measured by the stroke meter X3, when all of the pipe 2 is in the ground) Is the total length of the tube 2 (the length of a straight line connecting the tip center of the tube 2 and the center of the rear end of the tube 2 (the center position in the height direction at the rear end of the tube 2)), and θ is the actual measurement of the inclination angle. It is data.
At this time, the displacement amount Z (vertical displacement amount) at the tip center of the tube 2 or each of the plurality of tubes 2, 2... Is converted into an actually measured height with respect to an arbitrarily set height reference Y 0 (see FIG. 4). to manage. The height reference Y0 is set, for example, at the center position in the height direction (center of the rear end of the pipe 2) at the rear end edge of the pipe 2 before the propulsion work installed in front of the entrance 301.
In addition, since the inclination sensor X2 is attached to, for example, a flat surface that is the inner surface of the upper plate 2u of the tube 2, conversion for correcting the position of the inner surface of the upper plate 2u of the tube 2 to the tip center of the tube 2 is performed. Is going. That is, assuming that the tilt sensor X2 is attached to the center of the tip of the tube 2, the difference between the displacement reference Y01 (see FIG. 4) which is the position of the tip center of the tube 2 before propulsion and the height reference Y0. Is calculated.
The actually measured height is the vertical distance (hereinafter referred to as a fixed amount) between the displacement reference Y01 and the height reference Y0 which is the position of the tip center of the tube 2 before propulsion positioned before the entrance 301 + the tube 2 or Displacement amount Z (vertical displacement amount with reference to displacement reference Y01) at the tip center of tube 2 or each tube 2, 2... Each time a plurality of tubes 2, 2. )
The displacement amount Z is the same as that of the first pipe 2 from the left in FIGS. 4B, 4C, and 4D, and the pipe 2 before propulsion located in front of the entrance 301 starts propulsion. The amount of displacement of the center of the tip of the tube 2 (hereinafter referred to as the amount of displacement Z1) until all of the tube 2 is propelled into the ground + the tubes 2 other than the first tube 2 from the left in FIGS. 4 (c) and 4 (d) As described above, the total amount is obtained from the displacement amount (hereinafter referred to as displacement amount Z2) of the tip center of the tube 2 or the plurality of tubes 2, 2... After being propelled into the ground.
As for the displacement amount Z1, the cumulative distance obtained by accumulating the measured values from the stroke meter X3 obtained every time the pipe 2 propels a certain distance is set as A of A sin θ, and the inclination sensor X2 obtained every time the pipe 2 propels a certain distance. Is an amount of displacement obtained as θ of Asin θ.
That is, the actual position calculation means receives the displacement value Z1 at the tip center of the tube 2 when the tube 2 positioned in front of the entrance 301 is first propelled by a certain distance d from the stroke meter X3 (constant value). The distance of the tip 2 of the tube 2 when the tube 2 is propelled by a certain distance d is obtained by dsin θ based on the distance d and the tilt angle θ received from the tilt sensor X2 when the measured value d is received. Z1 is determined by (d × 2) sin θ based on the measured value (d × 2) received from the stroke meter X3 and the tilt angle θ received from the tilt sensor X2 when the measured value (d × 2) is received. As described above, when determining the displacement amount Z1, A of Asin θ is determined by the measured value d × n (n is the number of times of propelling the constant distance d) obtained from the stroke meter X3 every time the tube 2 propels the constant distance d. Asking for tube 2 The inclination angle θ obtained from the tilt sensor X2 each to promote the constant distance d is calculated by using a θ of A sin .theta.
For example, if the constant distance d is 5 cm, the displacement Z1 of the tip center of the pipe 2 every time the pipe 2 propels the constant distance d is obtained by 5 sin θ, 10 sin θ, 15 sin θ,.
The displacement amount Z2 is a displacement amount obtained when the inclination angle θ from the inclination sensor X2 obtained every time the tube 2 propels a certain distance is defined as θ of Asinθ, and the entire length of the tube 2 is determined as A of Asinθ.
For example, the measured height data of the tip center Y1 of each tube 2; 2... Shown in FIG.
The actually measured height of the tip center Y1 of the first tube 2 from the left is obtained by a fixed amount + the displacement Z1 of the tip center Y1 of the first tube 2 from the left.
The measured height of the tip center Y1 of the second tube 2 from the left is the fixed amount + the displacement Z1 of the tip center Y1 of the first tube 2 from the left + the displacement of the tip center Y1 of the second tube 2 from the left. Obtained by Z2.
The measured height of the tip center Y1 of the third tube 2 from the left is the fixed amount + the displacement Z1 of the tip center Y1 of the first tube 2 from the left + the displacement of the tip center Y1 of the second tube 2 from the left. Z2 + is obtained from the displacement Z2 of the tip center Y1 of the third tube 2 from the left.
The measured height of the tip center Y1 of the fourth tube 2 from the left is the fixed amount + the displacement Z1 of the tip center Y1 of the first tube 2 from the left + the displacement of the tip center Y1 of the second tube 2 from the left. Z2 + the displacement amount Z2 of the tip center Y1 of the third tube 2 from the left + the displacement amount Z2 of the tip center Y1 of the fourth tube 2 from the left.
The measured height of the tip center Y1 of the fifth tube 2 from the left is the fixed amount + the displacement Z1 of the tip center Y1 of the first tube 2 from the left + the displacement of the tip center Y1 of the second tube 2 from the left. Z2 + displacement amount Z2 of the tip center Y1 of the third tube 2 from the left + displacement amount Z2 + of the tip center Y1 of the fourth tube 2 from the left + displacement amount Z2 of the tip center Y1 of the fifth tube 2 from the left.
That is, the actually measured height of the tip center Y1 of the pipe 2 after the second and subsequent parts from the left have already been propelled into the ground is the fixed amount + the tip of the pipe 2 where all of the pipes 2 have not yet been propelled into the ground. The total displacement amount Z1 of the center Y1 + the tube 2 is obtained as a cumulative value of the displacement amount Z1 of the center of the tip of the tube 2 propelled into the ground.
For example, as shown in FIG. 4, when the tube 2 or each of the plurality of tubes 2, 2... Propels below the reference Y0, the actual center of the tip of the tube 2 or each of the plurality of tubes 2, 2. Is calculated with a value of “+”, and the actually measured height is a value of “+”. When the tube 2 or each of the plurality of tubes 2, 2... Is propelled above the reference Y0, the actual displacement amount at the tip center of the tube 2 or each of the plurality of tubes 2, 2. The measured height is a value of “−”.
Then, the actual position calculation means receives from the stroke meter X3 that the pipe 2 has been propelled from the entrance 301 by a certain distance (for example, several centimeters) after the pipe 2 is installed at the entrance 301. 4), for example, as shown in FIG. 4, the tube 2 or the plurality of tubes 2, 2 on the display screen 310 based on the measured height of the center of the tip of the tube 2 or the plurality of tubes 2, 2,. .. And the measured outer shape of the tube 2 or each of the plurality of tubes 2, 2... Are displayed on the display screen 310 like the tube 2 indicated by a solid line.
That is, the measured position calculation means displays the tip center Y1 of the tube 2 or the plurality of tubes 2, 2... On the display screen 310 each time the tube 2 or the plurality of tubes 2, 2. Based on the measured data of the inclination angle θ of the tube 2 or each of the plurality of tubes 2, 2..., An inclination line of the inclination angle θ (inclination angle θ with respect to the horizontal line) passing through the tip center Y 1 is drawn. The outer contour line along the length direction of each of the tubes 2, 2... Defines the upper and lower inclined lines that are parallel to the inclined line of the inclination angle θ and are opposed to each other with the height dimension of the tube 2 defined by the length of the tube 2. The contour line along the height direction of the tube 2 or each of the plurality of tubes 2, 2... Is obtained by connecting the ends of the upper and lower inclined lines.
That is, the measured position calculation means displays the measured outline of the tube 2 or each of the plurality of tubes 2, 2.

The design position calculation means calculates design data of the inclination angle of the tube 2 or each of the plurality of tubes 2, 2... With respect to the horizontal plane every time the tube 2 or the plurality of tubes 2, 2. Have accumulated. And the design displacement amount of the tip center of the tube 2 is obtained by Asin θ = Z. In this case, A is a constant (actual data of the propulsion amount of the pipe 2 measured by the stroke meter X3 when all of the pipe 2 is not in the ground, and pipe 2 when all of the pipe 2 is in the ground. ) (The length of a straight line connecting the tip center of the tube 2 and the center of the rear end of the tube 2 (the center position in the height direction at the rear end of the tube 2)), and θ is design data of the inclination angle. .
At this time, the design displacement amount Z (vertical displacement amount) of the center of the tip of the tube 2 or each of the plurality of tubes 2, 2... Is converted into the design height with respect to the height reference Y0 described above and managed.
The design height is based on the design of the center of the tip of the tube 2 or each of the plurality of tubes 2, 2... Each time the fixed amount + the tube 2 or the plurality of tubes 2, 2. Displacement amount Z (vertical displacement amount with reference to the displacement reference Y01 described above).
That is, the design displacement amount Z at the center of the tip of the tube 2 or each of the plurality of tubes 2, 2... Can be obtained in the same manner as the displacement amount Z1 and displacement amount Z2 described above. That is, the design displacement amount Z1 and displacement amount Z2 can be obtained by the above-described calculation method using the design data of the inclination angle θ instead of the actually measured data of the inclination angle θ.
The design displacement amount Z is the cumulative amount of the design displacement amount at the tip center of the tube 2 or each of the plurality of tubes 2, 2... You may obtain | require by a value.
Then, the design position calculation means, like the method for displaying the measured outer shape by the measured position calculation means described above, after the pipe 2 is installed at the entrance 301, each time it is actually propelled (for example, several centimeters) (entrance 301). Each time it is received from the stroke meter X3 that the tube 2 has been propelled by a certain distance), for example, as shown in FIG. 4, based on the design height of the tip center of the tube 2 or each of the plurality of tubes 2, 2. The tip center Y2 of the tube 2 or each of the plurality of tubes 2, 2... Is displayed on the display screen 310, and the tube 2 or the plurality of tubes 2, 2,. The design outline of is displayed.
That is, the design position calculation means displays the design outline of the tube 2 or each of the plurality of tubes 2, 2... While sequentially updating each time the tube 2 or the plurality of tubes 2, 2.

That is, every time the pipe 2 or each of the plurality of pipes 2, 2... Is propelled by a certain distance, the pipe 2 or the plurality of pipes 2, 2. The measured height (actual tip center Y1 of the tube 2 or each of the plurality of tubes 2, 2...) And the measured outer shape of the tube 2 are displayed, and the design of the tube 2 or the plurality of tubes 2, 2. The height (designed tip center Y2 of the tube 2 or each of the plurality of tubes 2, 2...) And the design outline of the tube 2 are displayed.
As described above, the measured outer shape of the tube 2 or the plurality of tubes 2, 2... And the design outer shape of the tube 2 or the plurality of tubes 2, 2. Thus, the supervisor can visually grasp the deviation of the actually measured position with respect to the design position of the pipe 2 or the plurality of pipes 2, 2.

The difference calculation means measures the inclination angle θ of the tube 2 or each of the plurality of tubes 2, 2... Each time the tube 2 or the plurality of tubes 2, 2. The difference between the data and the design data of the tilt angle θ (that is, the difference between the measured value of the tilt angle θ and the design value), and the measured height data (measured evaluation value) of the tube 2 or each of the plurality of tubes 2, 2. ) And the design height data (design evaluation value) (that is, the difference between the measured value of the tip center of the tube 2 or each of the plurality of tubes 2, 2. .
Then, as shown in FIG. 5 (a), the display means displays the design value of the height of the tube 2 or the plurality of tubes 2, 2... As the evaluation value, the actual measurement value, and the difference between the design value and the actual measurement value. In addition to the display on the display screen 310, as shown in FIG. 5 (b), the design value, the actual measurement value, and the difference between the design value and the actual measurement value of the inclination angle θ of the tube 2 or each of the tubes 2, 2. It is displayed on the screen 310 (note that a numerical value is actually displayed in XX in FIG. 5).
Thus, on the display screen 310, the design value (design height (design evaluation value)) and the actual measurement value (actual height (actual evaluation value)) of the pipe 2 or each of the plurality of pipes 2, 2,. And the difference between the design value and the actual measurement value of the inclination angle θ of the pipe 2 or each of the plurality of pipes 2, 2... It is possible to quantitatively grasp the deviation of the measured values of the pipe 2 or each of the plurality of pipes 2, 2.
Also, the design height of the pipe calculated from the standard Y0 and the design value arbitrarily determined as the design evaluation value, and the reference Y0 and the pipe 2 or the plurality of pipes 2, 2,. Since the measured height of the pipe is calculated based on the measured value of the inclination angle, the pipe 2 or each of the plurality of pipes 2 is based on the height of the pipe 2 or the plurality of pipes 2, 2. , 2 ... can now be grasped.
Although not shown, the display means transmits an inclination angle transmitted at a predetermined time interval (for example, every 100 ms) from each inclination sensor X2, X2... The displacement amount X of the tip center of the tube 2 or each of the plurality of tubes 2, 2... calculated by the measured position calculation means based on the θ data and the inclination angle θ data is sequentially displayed on the display screen 310. . As a result, the status of the pipe 2 being propelled or each of the plurality of pipes 2, 2... Can be monitored in detail in real time.

According to the embodiment, the supervisor can continuously (real-time) grasp the change in the propulsion status of the pipe 2 or each of the plurality of pipes 2, 2... Since the deviation between the actually measured position and the design position in the ground of 2, 2,... Can be grasped visually and quantitatively, the propulsive force by the hydraulic cylinder 200A of the propulsion device 5 is increased before the deviation increases. By controlling the excavation direction (see FIG. 11) by controlling the vertical swing drive means 100 (see FIG. 8, etc.), which will be described later, (see FIG. 11), It is possible to reduce the deviation between the actual measurement position and the design position in the ground, and the pipe 2 or each of the plurality of pipes 2, 2... Can be installed at a position close to the design position, so that highly accurate installation work can be realized. become.
Further, without interrupting the propulsion work, the propulsion work of the pipe 2 or each of the plurality of pipes 2, 2,... Can be performed efficiently, and the construction period can be shortened.
That is, according to the pipe state monitoring method when the pipe is installed in the ground in the embodiment, the efficiency of the propulsion work can be improved and the position of the pipe 2 or the plurality of pipes 2, 2,. It becomes possible to confirm continuously.

In particular, since the inclination sensors X2 are attached to all the pipes 2, 2,... Installed in the ground, the behavior of the pipes 2, 2,. The situation can be monitored in detail.
That is, the succeeding pipes 2B, 2B,... Are sequentially connected to the rear of the leading pipe 2A, so that the succeeding pipes 2B, 2B,. In some cases, only the leading pipe 2A follows the design line, and the succeeding pipes 2B, 2B,... Deviate from the design line. In particular, when the propulsion distance is increased, the pipes 2B, 2B, ... tend to bend and deform.
In other words, if only the trajectory tendency of the tubes 2, 2... Is observed, the inclination sensor X2 may be simply attached to the top tube 2A, but in reality, the positions of the subsequent tubes 2B, 2B. Therefore, in the first embodiment, by attaching the inclination sensor X2 to all the pipes 2 installed in the ground, the situation of the subsequent pipes 2B, 2B... Can be monitored in detail, thereby realizing highly accurate installation work. I can do it now.

In addition, the inclination sensor X2 as the inclination detecting means is attached to the leading pipe 2A connected to the rotary excavator 10, and to one or more of the succeeding pipes 2B, 2B... Sequentially connected to the rear of the leading pipe 2A. Install it. For example, the inclination sensor X2 may be provided on at least the leading, middle, and trailing end pipes 2 of the pipe row composed of the leading pipe 2A and the plurality of succeeding pipes 2B, 2B,. Alternatively, every other tube 2 in the tube row may be provided with an inclination sensor X2.
In the above description, the displacement amount Z at the center of the tip of the tube 2 or each of the plurality of tubes 2, 2... Is obtained every time the tube 2 or each of the plurality of tubes 2, 2. The amount Z may be obtained at regular time intervals. That is, based on the propulsion amount A (measured value obtained from the stroke meter X3) of the pipe 2 obtained at regular time intervals and the inclination angle θ (inclination angle θ obtained from the inclination sensor X2) of the pipe 2, Asinθ = The displacement amount Z may be calculated from Z.
Further, although the height data is used as the evaluation value (measured evaluation value, design evaluation value), other data obtained based on the inclination angle may be used.

  It is also possible to use a curved pipe as the pipe 2 and connect a plurality of curved pipes, and install a curved pipe line that bends and extends so that the center line draws an arc. In addition, when the inclination sensor X2 is attached to the curved surface of the curved pipe, the direction of the tangent to the curved surface may not be known, and the reference plane when the inclination angle θ is measured by the inclination sensor X2 may not be known. Is used, a flat surface portion serving as a reference surface for measuring the inclination angle θ by the inclination sensor X2 is provided on the curved surface of each curved pipe, and the inclination sensor X2 is attached to the flat surface portion.

Hereinafter, based on FIG. 6 thru | or FIG. 12, the structure and operation | movement of the pipe | tube installation apparatus 1 for installing the pipe | tube 2 in the ground are demonstrated.
In the following, the upper side in FIG. 6 is the front or front side of the pipe installation device 1, the lower side in FIG. 6 is the rear side of the pipe installation device 1, the left and right sides in FIG. A direction orthogonal to the vertical direction is defined as the upper and lower sides of the pipe installation device 1. That is, as shown by the arrows in FIG. 8, the front and rear, the left and right, and the top and bottom of the pipe installation device 1 are defined and described.

First, the configuration of the pipe installation device 1 will be described.
As shown in FIG. 6, the pipe installation device 1 includes a pipe 2 and a drilling device 3.
The excavator 3 includes an excavating machine 4, a propulsion device 5, a water supply / drainage device 6, a water stop device 7, a detection means 8 (see FIGS. 9 and 10), a hydraulic motor and a hydraulic cylinder, which will be described later, and the like. And a control device 9 for controlling the driving source.

  The pipe 2 installed in the ground by the excavator 3 is, for example, a pipe 2 having a rectangular cross section orthogonal to the center line of the pipe 2 and having a trapezoidal side wall 2a as described above. The pipe 2 is a first pipe 2A that is first inserted into the ground, and a plurality of subsequent pipes 2B, 2B,... Sequentially connected to the rear of the first pipe 2A.

The rotary excavator 10 is positioned at a position in front of the one end opening 2t, which is the front end (tip) of the leading pipe 2A, and includes a rotary excavator support 12 that supports the rotary excavator 10 in a rotatable and swingable manner. .
The rotary excavator 10 is configured to rotate around a rotation center line L that intersects the propulsion direction F of the leading pipe 2A into the ground.
The rotary excavator 10 is configured to be swingable in the left-right direction and the up-down direction about the center line 2c of the leading pipe 2A.

  The excavating machine 4 includes a rotary excavator 10, a rotation drive unit 11 for the rotary excavator 10, a rotary excavator support 12, and a swing drive unit 13 for the rotary excavator 10.

  The rotary excavator 10 includes, for example, a circular box-shaped rotary body 18 that is closed at one end and has a cylindrical portion 16 and a bottom plate 17 that closes the other end of the cylindrical portion 16, and an outer periphery of the cylindrical portion 16 of the rotary body 18. It is the structure provided with the some excavation bit 20,20 ... provided in the surface 19. FIG.

The rotation driving means 11 of the rotary excavation body 10 includes, for example, a motor and a rotation driving source of the motor. As the motor, for example, a motor that operates by fluid pressure or a motor that operates by electricity is used.
The rotary drive unit 11 of the rotary excavator 10 is constituted by, for example, a hydraulic motor (hereinafter referred to as a hydraulic motor 21) and a hydraulic source (not shown) as a rotary drive source of the hydraulic motor 21. In this case, the hydraulic source and the hydraulic motor 21 are connected by a pressure hose 23 having a pressure oil supply path and an oil return path.
For example, the casing 24 of the hydraulic motor 21 is fixed to the motor mount 25, and the rotating shaft 26 is configured to rotate by pressure oil supplied to the hydraulic motor 21 from the hydraulic source via the pressure hose 23. Further, the rotary shaft 26 rotated by the hydraulic motor 21 and the inner surface of the bottom plate 17 of the rotary body 18 so that the circle center of the inner surface of the bottom plate 17 of the rotary body 18 of the rotary excavator 10 and the rotation center of the rotary shaft 26 coincide with each other. Are connected to a connecting plate 28 provided at the tip thereof by a connecting tool 29 such as a screw.
That is, the two rotary excavating bodies 10 and 10 are positioned in front of the one end opening 2t of the leading pipe 2A, and the two rotary excavating bodies 10 and 10 are common to the two rotary shafts 26 and 26, and one rotation center line L Is configured to rotate around the center of rotation. Such a configuration including the two rotary excavators 10, 10 is called a twin header.

The rotary excavator support section 12 can rotate the rotary excavator 10 by supporting the support 14 supported on the inner surface of the leading pipe 2A, the base end side being connected to the support body 14, and the distal end side being connected to the hydraulic motor 21. And a connecting support column portion 15 to be supported.
The support body 14 is supported by a support substrate 30 in which the base end side of the connection support column 15 is connected to the front surface 44, and the support substrate 30 and a tube side support portion 32 provided on the inner surface of the leading tube 2A. A cylindrical support 31 is provided.
In the stationary state of the pipe installation device 1, the rotary excavator 10 is supported by the top pipe 2A via the rotary excavator support 12 and the rotary excavator 10 is driven for excavation. , The leading pipe 2A is pulled by the rotary excavator 10 (the traction force by the rotary excavator 10 is transmitted to the leading pipe 2A via the rotary excavator support part 12 and the pipe side support part 32). Thus, the top pipe 2A is pulled). In the present invention, all of these states are defined as “support”.

The connection column part 15 includes a column part 33 and a connection frame 34.
The support column 33 includes a hollow support column 35, a reinforcement connecting portion 36 having a reinforcing portion that reinforces the hollow support column 35 and a connecting plate that is connected to the connecting mount 34.
The hollow strut portion 35 includes a main strut portion 38 and two branch strut portions 39, 39 extending from the tip of the main strut portion 38 to the left and right. The two branch support portions 39, 39 extend from the front end portion of the main support post portion 38 in a direction away from each other on a straight line orthogonal to the extension direction of the main support post portion 38. In other words, the hollow column portion 35 has a T-shaped hollow space in which one main column portion 38 and two branch column portions 39 and 39 are combined.

The distal ends of the branch struts 39, 39 are connected to the motor mounts 25, 25 of the rotary excavators 10, 10, respectively. The pressure hoses 23, 23 connected to the hydraulic motors 21, 21 of the rotary excavators 10, 10 extend outside from the rear end opening of the hollow column 35 via the inside of the hollow column 35. Connected to an external hydraulic source.
Therefore, when the pressure oil is supplied to the hydraulic motors 21 and 21 of the two rotary excavators 10 and 10 through the respective pressure hoses 23 and 23, the two rotary shafts 26 and 26 rotate, and the two rotary excavators are rotated. A twin header is configured that rotates around a single rotation center line L that is common to 10 and 10.
In addition, at the rear end opening of the hollow support column 35, for example, the pressure-resistant hoses 23 and 23 in the hollow support column 35 connected to the hydraulic motors 21 and 21 and the external pressure-resistant hoses 23 and 23 connected to the hydraulic power source are provided. Are connected to each other. Further, the external pressure-resistant hoses 23, 23 may be replaced with a long-length pressure-resistant hose 23 as the pipe 2 is propelled into the ground, or the pressure-resistant hoses 23 may be sequentially added.

The connecting frame 34 sets the position where the reinforcing connecting portion 36 is connected to a position away from the front surface 44 of the support substrate 30 and sets the rotation center line L of the two rotary excavators 10 and 10 to one end of the leading pipe 2A. It is an adjustment member for positioning in front of the opening 2t.
The connecting gantry 34 includes a cylindrical body 40 that penetrates the main support column 38, a rear end plate 41 that has a plate surface that surrounds the rear end periphery of the cylindrical body 40 and is orthogonal to the center line of the cylindrical body 40, and the cylindrical body 40. And a front end plate 42 having a plate surface that is orthogonal to the center line of the cylindrical body 40 and surrounds the periphery of the front end.
Accordingly, the connection frame 34 is arranged so that the center line of the cylindrical body 40 of the connection frame 34 and the center line of the main support column through hole 43 formed in the support substrate 30 coincide with each other. The rear end plate 41 of the connection base 34 is connected to the front surface 44 of the support substrate 30 in a state where the rear plate surface of the surface 41 and the front surface 44 around the through hole of the support column 30 are in surface contact.
Further, the rear end side of the main support column 38 is inserted into the inside of the cylindrical body 40 of the connection frame 34 from the front side of the connection frame 34, and the connection plate of the reinforcing connection part 36 and the front end plate 42 of the connection frame 34 are faced. By being connected in contact, the front opening 45 of the cylindrical body 40 of the connection base 34 is sealed.
Thereby, the main support column 38 is provided so as to extend in a direction orthogonal to the front surface 44 of the support substrate 30, and the rotary shafts 26, 26 of the two hydraulic motors 21, 21 are arranged at the tip ends of the main support column 38. Further, they extend in a direction away from each other on a straight line orthogonal to the extending direction of the main support column 38 (that is, on the center line of the branch support columns 39, 39).
As described above, the excavating machine 4 has a configuration in which the rotary excavation body 10 is connected to the front surface 44 of the support substrate 30 via the connection support column 15 so that the rotary excavation body 10 can rotate.

The rotary excavator 10 includes a rotary body 18 that rotates around the rotation center line L and a plurality of excavation bits 20, 20... Provided so as to protrude from the outer peripheral surface 19 of the cylindrical portion 16 of the rotary body 18. As shown in FIG. 7, the rotation diameter dimension 46L when rotating is the shortest distance dimension between the upper and lower outer surfaces 2f, 2f of the tube 2 (one pair of outer surfaces of the tube 2 parallel to the rotation center line L). Or the shortest distance dimension between the upper and lower inner surfaces of the pipe 2 (the shortest distance dimension between one pair of inner surfaces of the pipe 2 parallel to the rotation center line L). Is also formed large.
The rotary excavator 10 is configured to be able to pass through the pipe 2 in a recoverable state (the state of the rotary excavator 10 shown in FIG. 7).
That is, when the rotary excavator 10 is in the above-described recoverable state, it is the uppermost position located at the uppermost position in the direction along the line perpendicular to the upper and lower inner surfaces (one pair of inner surfaces of the tube 2). The uppermost end of the excavation bit 20 (the upper end of the excavation bit 20 closest to the same plane as the inner surface of the pipe 2) and the lowest position in the direction along the line perpendicular to the upper and lower inner surfaces of the pipe 2 Length 46S between the lower end of the lower excavation bit 20 (the lower end of the excavation bit 20 closest to the same plane as the lower inner surface of the pipe 2) (maximum distance between the upper and lower bits when the rotary excavator can be recovered) Dimension) is configured to be smaller than the shortest distance between the upper and lower inner surfaces of the tube 2.
Accordingly, when the rotary excavator 10 is rotationally driven in a state where the rotary excavator 10 is positioned in front of the one end opening 2t of the top pipe 2A, a plurality of excavation bits 20, 20,. Since 10A is excavated, it is possible to excavate the top and bottom of the natural ground 10A in front of the leading pipe 2A, that is, to excavate the vertical width larger than the vertical width of the leading pipe 2A. When collecting at the departure base, the rotary excavation body 10 can be pulled back into the pipe 2 by setting the rotary excavation body 10 to be in the recoverable state described above, and the rotary excavation body 10 can be used as the departure base. It becomes possible to collect.

As shown in FIGS. 9 and 10, the detection means 8 is for detecting that the rotary excavation body 10 is in the recoverable state described above, and is, for example, an example of a magnetic field generation means as a detected object. A detection sensor using a certain magnet 51 and a Hall IC 52 which is an example of magnetic detection means as a detection body for detecting the magnet 51 is used. The magnet 51 is protected by a cover 53.
That is, for example, the Hall IC 52 is rotated and excavated so that the Hall IC 52 can detect the magnet 51 by minimizing the distance between the Hall IC 52 and the magnet 51 when the rotating excavator 10 is in the recoverable state described above. The magnet 51 is fixed on the peripheral surface of the rotating body 18 by fixing the body 10 to the outer surface of the column 33 of the rotary excavating body support 12 that rotatably supports the body 10.
By providing the detection means 8 configured in this manner, when the rotary excavation body 10 is in a recoverable state, the Hall IC 52 detects the magnet 51, so that the rotary excavation body 10 is in a recoverable state. This can be notified to the ground by light, voice or the like, and the operator can know that the rotary excavation body 10 is in a recoverable state on the ground. That is, the operator slowly rotates the rotary excavator 10 before performing the operation of recovering the rotary excavator 10 to the starting base, and the Hall IC 52 detects the magnet 51 so that the rotary excavator 10 can be recovered. If it is confirmed by a not-shown notification means, the rotary excavator 10 can be put into the pipe 2 by stopping the rotation of the rotary excavator 10, so that the rotary excavator 10 is routed through the pipe 2. It is possible to collect at the departure base.
That is, since the detection means 8 is provided, it is reliably detected that the rotary excavation body 10 is in a recoverable state, and therefore the rotary excavation body 10 can be recovered when the rotary excavation body 10 is recovered to the starting base. It becomes possible to confirm whether or not the vehicle is in a state, and the recovery work for recovering the rotary excavated body 10 to the departure base can be easily performed.

  The leading pipe 2A includes, for example, a front end side pipe 61, a rear side pipe 62, and a support pipe 63 provided between the front end side pipe 61 and the rear side pipe 62 for supporting the cylindrical support body 31. Provided, the front end surface of the rear tube 62 and the rear end surface of the support tube 63 are connected by welding or the like, and the front end surface of the support tube 63 and the rear end surface of the front end side tube 61 are connected by welding or the like. .

  The cylindrical support 31 is installed on the front side in the top tube 2A so that the center line of the tube of the cylindrical support 31 extends along the center line 2c of the top tube 2A. For example, the cylindrical support body 31 is formed of a cylindrical body having a rectangular cross section, and the center tube 2c of the top tube 2A is the same as the center line 2c of the top tube 2A. It is installed on the front side in 2A and supported by the support pipe 63.

For example, cylindrical protrusions 66 and 66 are formed on the left and right outer surfaces 65 and 65 of the cylindrical support 31 as engaging projections protruding from the outer surfaces 65 and 65, and the left and right inner surfaces of the support tube 63. Are formed with recesses 68 and 68 as engaging recesses with which cylindrical protrusions 66 and 66 protruding from the left and right outer surfaces 65 and 65 of the cylindrical support 31 are engaged.
As shown in FIG. 10, the concave groove 68 formed in the support pipe 63 has an entrance path 69 for receiving the columnar projection 66 from the rear side of the leading pipe 2A, and the front end side of the entrance path 69 is a semicircular recess. It is formed by the recessed part used as the wall 70 (pipe side support part 32). That is, the concave groove 68 has a road width that is substantially the same as the diameter of the circle of the cylindrical protrusion 66 (a diameter that is a few millimeters larger than the diameter of the circle of the cylindrical protrusion 66). An approach path 69 that restrains the movement of the direction, and the front end side of the approach path 69 is in contact with the circumferential surface of the columnar protrusion 66 to restrict the forward movement of the columnar protrusion 66. It is formed by a semicircular concave wall 70 having substantially the same diameter as the diameter (a diameter that is several millimeters larger than the diameter of the circle of the cylindrical protrusion 66). The center of the circle of the cylindrical protrusion 66 is positioned at the center between the upper and lower sides of the left and right outer surfaces 65, 65 of the cylindrical support 31, and the center of the circle of the semicircular concave wall 70 in the concave groove 68 is It is located at the center between the upper and lower surfaces of the left and right inner surfaces of the support tube 63.

Accordingly, in the initial state where the cylindrical projections 66 and 66 engage with the concave grooves 68 and 68 and the cylindrical projections 66 and 66 collide with the concave walls 70 and 70, the cylindrical support 31 cannot move forward. The rotation support part 71 that forms the center of rotation of the cylindrical support 31 is configured, and the cylindrical support 31 rotates around the rotation support part 71 so that the rotary excavation body can swing vertically. It is configured.
In this way, the engaging convex portion is formed by the cylindrical protrusions 66, 66, and the engaging concave portion includes the entrance path 69 through which the cylindrical protrusion 66 enters and the semicircular concave wall 70 where the cylindrical protrusion 66 matches. Since it is formed by the recessed groove 68, the work of forming the rotation support portion 71 of the cylindrical support 31 by engaging the cylindrical protrusions 66, 66 with the recessed grooves 68, 68 is facilitated and rotated. By providing the support portion 71, the cylindrical support 31 can be smoothly rotated. Further, the cylindrical support 31 can be easily and reliably supported on the concave wall 70 functioning as the tube side support portion 32.

As shown in FIG. 7, a support surface 72 that supports the cylindrical support 31 so as to be swingable in the vertical direction is provided on the inner peripheral surface on the front end side of the support tube 63. The support surface 72 is configured by, for example, an annular body 74 made of, for example, rubber and attached to an annular attachment groove 73 formed on the inner peripheral surface of the front end side of the support tube 63.
The front end side of the outer peripheral surface of the cylindrical support 31 is configured to be a supported surface 75 formed on a reduced diameter outer surface that is reduced in diameter toward the front end, and the support surface 72 is in contact with the supported surface 75. That is, it is formed on a reduced diameter inner surface formed so as to reduce the diameter toward the front end.
In addition, the support surface 72 is formed of rubber, and the outer side of the front end side of the reduced diameter inner surface forming the support surface 72 is formed in a cavity 76 having an open front end, and the contraction surface forming the support surface 72 is formed. The front end side of the inner diameter surface is easily deformed to the outside (the inner peripheral surface side of the support tube 63), and the rotary excavator 10 is easily swung in the vertical direction. When the cylindrical support 31 is swung in the vertical direction, the upper and lower surfaces of the support surface 72 function as guide surfaces.

The concave groove 68 and the annular mounting groove 73 as the engaging concave portions formed in the support tube 63 are formed by denting the reference inner surface 80 of the support tube 63.
As shown in FIG. 10, the maximum length between the left and right sides of the cylindrical support 31 that is the distance between the end surface of the left cylindrical projection 66 and the end surface of the right cylindrical projection 66 of the cylindrical support 31 is The length is slightly shorter than the maximum length between the left and right sides of the support tube 63, which is the distance between the bottom surface of the left groove 68 and the bottom surface of the right groove 68 of the support tube 63.
In addition, the length between the left and right outer surfaces 65 of the cylindrical support 31 is shorter than the length between the left and right reference inner surfaces 80 of the support tube 63, and the left of the support tube 63 is left. A gap 81S is formed between the reference inner surface 80 and the left outer surface 65 of the cylindrical support 31, and between the right reference inner surface 80 of the support tube 63 and the right outer surface 65 of the cylindrical support 31. (See FIG. 10).
Further, the length between the upper and lower outer surfaces 84, 84 of the cylindrical support 31 is formed to be shorter than the length between the upper and lower reference inner surfaces 80, 80 of the support tube 63. A gap 85 is formed between the upper outer surface 84 and the reference inner surface 80 above the support tube 63 and between the outer surface 84 below the cylindrical support 31 and the reference inner surface 80 below the support tube 63. (See FIG. 7).
Therefore, in the initial state where the cylindrical support 31 cannot move to the front side, the contact portion between the cylindrical support 31 and the support tube 63 is the circumferential surface of the cylindrical protrusion 66 of the cylindrical support 31 and the concave groove. 68 is only a contact portion with the concave wall 70, and a contact portion between the supported surface 75 on the front end side of the outer peripheral surface of the cylindrical support 31 and the support surface 72 of the support tube 63, and the other portions are non-contact. Since the state is maintained, the cylindrical support body 31 is rotatable around the rotation support portion 71 as a rotation center.

The outer surfaces 65 and 84 of the cylindrical support 31 are formed in a plane.
The reference inner surface 80 of the support tube 63 is formed in a plane.
The left and right inner surfaces 82, 82 of the cylindrical support 31 are curved concave surfaces that are curved so as to be recessed in the direction away from the center line along the center line of the cylinder of the cylindrical support 31, or the left and right reference inner surfaces of the support tube 63. It is formed in a plane parallel to 80 and 80.

The support substrate 30 is formed in a rectangular flat plate shape whose outer peripheral shape is slightly smaller than the inner peripheral dimension of the cylindrical support 31 that matches the inner peripheral shape of the cylindrical support 31. It is supported so that it can swing.
The support substrate 30 has a plate thickness along the front-rear direction of the leading tube 2A, and the left and right outer surfaces (end surfaces) 83, 83 project along the center line of the support substrate 30 in a direction away from the center line and curve. The curved convex surface or a plane parallel to the left and right reference inner surfaces 80 of the support tube 63 is formed.

For example, cylindrical protrusions 86 and 86 (see FIG. 7) are provided at the center positions between the left and right sides of the upper and lower outer surfaces 67 and 67 of the support substrate 30. The cylindrical projections 86 and 86 are fitted into circular holes 87 and 87 formed on the upper and lower inner surfaces of the cylindrical support 31 so as to be rotatable about the center line of the cylindrical projections 86 and 86 as a rotation center. With this configuration, the rotation support portion 88 of the support substrate 30 is formed, and the left and right ends of the support substrate 30 are configured to be swingable in the front-rear direction with the rotation support portion 88 as a rotation center. That is, the support substrate 30 is configured so that the pair of left and right outer surfaces 83 and 83 facing the pair of left and right inner surfaces 82 and 82 of the cylindrical support 31 can swing in the front-rear direction with the rotation support portion 88 as the rotation center. It is attached to the cylindrical support 31.
When the rotary excavator 10 is connected to the support substrate 30 via the connection support portion 15, the left and right outer surfaces 83, 83 of the support substrate 30 swing in the front-rear direction. The rotary excavator 10 is configured to be swingable in the left-right direction around the center line 2c of the front pipe 2A, that is, in a direction orthogonal to the left and right inner surfaces of the front pipe 2A.

  As shown in FIGS. 6 and 10, the left and right inner surfaces 82, 82 of the cylindrical support 31 are formed as curved concave surfaces that are curved along the center line of the cylinder of the cylindrical support 31, so The outer surfaces 83, 83 are formed as curved convex surfaces that curve along the center line of the support substrate 30, and the left and right curved convex surfaces of the support substrate 30 and the left and right sides of the cylindrical support 31 are moved when the support substrate 30 moves in the front-rear direction. When the curved concave surface is configured to slide, the movement of the support substrate 30 is stabilized.

As shown in FIG. 6, the support substrate 30 is formed with a main strut portion through-hole 43 that penetrates the support substrate 30 in the front-rear direction and a water supply / drainage tube holding through-hole 90.
For example, the main support column through-hole 43 is formed so as to penetrate the central portion of the support substrate 30, and the two water supply / drain pipe holding through-holes 90 are provided so as to penetrate the left and right positions of the support substrate 30. The leading end side of the water supply / drainage pipe 91 is connected to the water supply / drainage pipe holding through hole 90.

As the swing drive means 13 of the rotary excavator 10, the rotary excavator 10 is moved up and down by swinging the upper and lower portions of the cylindrical support 31 back and forth around the rotation support portion 71 of the cylindrical support 31. A vertical swing driving means 100 for swinging in the upper and lower inner surfaces of the top tube 2A (a direction perpendicular to the pair of inner surfaces facing each other of the top tube 2A) and the rotation support portion 88 of the support substrate 30 are provided. The left and right outer surfaces 83, 83 of the support substrate 30 are swung back and forth as the center of rotation, and the rotary excavator 10 is moved in the left-right direction (the left and right inner surfaces of the leading pipe 2A (the other pair of inner surfaces facing each other of the leading pipe 2A)) And a left-right swing drive means 150 for swinging in a direction perpendicular to the vertical axis.
That is, the base end side of the connecting support column 15 that rotatably supports the rotary excavator 10 is connected to the front surface 44 of the support substrate 30, and the support substrate 30 is swung around the rotation support portion 88 by the left and right swing drive means 150. By moving the rotary excavator 10, the direction along the upper and lower inner surfaces (one pair of inner surfaces of the front pipe 2A facing each other) of the front pipe 2A parallel to the rotation center line L of the rotary excavator 10, that is, The top tube 2A is configured to be swingable in the left-right direction.
Further, the support 14 is configured to be able to swing in the direction orthogonal to the upper and lower inner surfaces of the leading pipe 2A parallel to the rotation center line L of the rotary excavating body 10, that is, in the vertical direction of the leading pipe 2A, By swinging the support body 14 with the rotation support portion 71 as the rotation center by means 100, the rotary excavation body 10 has upper and lower inner surfaces (of the front pipe 2A) parallel to the rotation center line L of the rotary excavation body 10. It is configured to be swingable in a direction orthogonal to a pair of inner surfaces facing each other in the height direction, that is, in the vertical direction of the leading pipe 2A.

As shown in FIGS. 7, 8, and 9, the vertical swing drive means 100 includes an vertical swing actuator 101 that serves as a drive source for swinging the rotary excavator 10 up and down, and an actuator installation portion 102. It is prepared for.
The vertically swinging actuator 101 is constituted by, for example, a hydraulic cylinder (hereinafter referred to as a hydraulic cylinder 101).
One hydraulic cylinder 101 is disposed on each of the left end side and the right end side behind the support substrate 30.

The actuator installation unit 102 includes a front frame 103 and a rear frame 104.
The front gantry 103 and the rear gantry 104 are arranged one by one on the left end side and the right end side behind the support substrate 30, respectively.
The front frame 103 has a front end connected to the rear end face 106 of the cylindrical support 31 and a cylinder side end 108 of the hydraulic cylinder 101 fixed to the rear end.
A piston rod side end 109 of the hydraulic cylinder 101 is fixed to the rear gantry 104.
The front frame 103 connects the front vertical member 110 connected to the rear end surface 106 of the cylindrical support 31, the rear vertical member 111, and the upper end portion of the front vertical member 110 and the upper end portion of the rear vertical member 111. The upper horizontal member 112, the lower horizontal member 113 that connects the lower end of the front vertical member 110 and the lower end of the rear vertical member 111, and the rear vertical member 111 are provided to extend rearward from the upper end side. An upper connecting member 114 and a lower connecting member 115 provided to extend rearward from the lower end side of the rear longitudinal member 111 are provided.
The rear gantry 104 extends in the vertical direction so as to extend forward from the upper longitudinal portion 116 connected to the upper coupling member 114 and the lower coupling member 115 of the front gantry 102 and from the upper end side of the front vertical portion 116. The formed hydraulic cylinder fixing portion 117, the rear vertical portion 118 provided so as to extend in the vertical direction continuously to the rear side of the front vertical portion 116, and the vertical direction on the rear end surface of the rear vertical portion 118 And a rear connecting portion 119 provided to extend rearward from the intermediate portion. A rear connection flange 120 connected to a front connection flange 204 provided at the front end of the subsequent thrust transmission rod 202 is provided at the rear end of the rear connection portion 119.

An upper elongated hole 121 extending in the vertical direction is formed on the upper side of the front vertical portion 116 of the rear gantry 104, and a lower side extending in the vertical direction on the lower side of the front vertical portion 116 of the rear gantry 104. A long hole 122 is formed.
A pin 123 provided on the rear end side of the upper connecting member 114 of the front gantry 103 is connected to the upper long hole 121 so as to be movable in the upper long hole 121, and the lower connection of the front gantry 103. A pin 124 provided on the rear end side of the member 115 is connected to the lower long hole 122 so as to be movable in the lower long hole 122.

  Further, the cylinder side end portion 108 of the hydraulic cylinder 101 is rotatably attached to the lower connecting member 115 of the front frame 103 via the rotation support shaft 108A, and the piston rod side end portion 109 of the hydraulic cylinder 101 is connected to the rear frame 104. The hydraulic cylinder fixing portion 117 is rotatably attached via a rotation support shaft 109A.

  Since the upper long hole 121 and the lower long hole 122 are formed so as to extend along an arc centering on the rotation support portion 71 serving as a rotation center when the cylindrical support 31 swings up and down, By operating the cylinder 101, the pin 123 as a shaft portion provided on the rear end side of the upper connecting member 114 of the front frame 103 moves in the upper long hole 121, and the lower connecting member 115 of the front frame 103. A pin 124 as a shaft portion provided on the rear end side moves in the lower elongated hole 122, and the front gantry 103, the rotary excavation body support portion 12, and the rotary excavation body 10 have the rotation support portion 71 as the rotation center. By rotating, the rotary excavator 10 can swing in a direction orthogonal to the upper and lower inner surfaces (one pair of inner surfaces of the leading pipe 2A) of the leading pipe 2A.

Since the actuator installation section 102 having the above configuration is provided, the rotary excavation body 10 can be swung in the vertical direction as shown in FIG.
For example, when the piston rod 125 of the hydraulic cylinder 101 is set to an intermediate position between the maximum extension position and the maximum contraction position, the cylindrical support 31 is not rotated (the reference of the cylindrical support 31). It is assumed that the outer surface 81 and the reference inner surface 80 of the support tube 63 are set in parallel (see FIG. 11A).
When it is desired to swing the rotary excavator 10 upward, as shown in FIG. 11 (b), the reaction force generated by extending the piston rod 125 causes the bottom of the front platform 103 to which the cylinder 126 is fixed. The cylindrical support 31 rotates around the rotation support portion 71 so that the side connecting member 115 moves downward and the pins 123 and 124 move downward. The supported surface 75 slides on the lower support surface 72 that becomes the guide surface and moves forward, and the supported surface 75 at the upper front end of the cylindrical support 31 is on the upper support surface 72 that becomes the guide surface. Is moved rearward, and the rotary excavation body 10 moves upward.
Further, when it is desired to swing the rotary excavator 10 downward, as shown in FIG. 11C, the lower connecting member of the front gantry 103 to which the cylinder 126 is fixed is contracted by contracting the piston rod 125. The cylindrical support 31 rotates about the rotation support portion 71 so that the pins 123 and 124 move upward and the pins 123 and 124 move upward, so that the supported surface of the upper end of the cylindrical support 31 is supported. 75 slides on the upper support surface 72 serving as the guide surface and moves forward, and the supported surface 75 at the lower front end of the cylindrical support 31 slides on the lower support surface 72 serving as the guide surface. Then, the rotary excavator 10 moves downward.

  As described above, the cylindrical support 31 rotates around the rotation support portion 71 in response to the force from the hydraulic cylinder 101, and the supported surface 75 of the cylindrical support 31 is formed on the inner surface of the leading pipe 2A. The rotary excavator 10 is configured to be able to swing in the vertical direction about the center line 2c of the top pipe 2A by moving on the support surface 72 serving as the guide surface.

Further, the vertical swing driving means 100 includes a front gantry 103 and a rear gantry 104 which are separated, and a cylinder side end portion 108 of the hydraulic cylinder 101 is rotatably attached to the front gantry 103 via a rotation support shaft 108A. In addition, when the piston rod side end 109 of the hydraulic cylinder 101 is rotatably attached to the rear frame 104 via the rotation support shaft 109A, when the piston rod 125 of the hydraulic cylinder 101 is extended and contracted, the front side A pin 123 provided on the upper connecting member 114 of the gantry 103 moves in the upper long hole 121, and a pin 124 provided in the lower connecting member 115 moves in the lower long hole 122. Yes.
That is, the rotation support part 71 that is the rotation center when the rotary excavator 10 is swung in a direction orthogonal to the upper and lower inner surfaces (one pair of inner surfaces facing each other of the tube) of the subsequent tube 2B. A plurality of long holes 121 and lower long holes 122 formed so as to extend along the same circular arc centered on the pin, and the pin 123 moves in the upper long hole 121. Since the pin 124 is configured to move in the lower elongated hole 122, the rotary excavator 10 can be smoothly swung around the rotation support portion 71 as a rotation center.

  That is, in the pipe installation device 1 of the embodiment, when the rotary excavator 10 swings in the vertical direction, the force received by the rotary excavator 10 from the natural ground 10A is a slide mechanism by the pin 123 and the upper elongated hole 121, The slide mechanism by the pin 124 and the lower long hole 122, and the rotation support shaft 108A and the rotation support structure by the rotation support shaft 109A of the hydraulic cylinder 101 as a swinging actuator, the hydraulic cylinder 101 and the following propulsive force transmission rod shape to be described later. It becomes difficult to join the body 202. That is, when the rotary excavator 10 swings in the vertical direction, the force from the natural ground 10A can be converted into the slide motion by the slide mechanism and the rotary motion by the rotary support structure, and the hydraulic cylinder 101 and the subsequent propulsive force transmission rod shape. Since the damage received by the body 202 can be reduced, it is possible to prevent a situation in which the hydraulic cylinder 101 and the subsequent propulsive force transmission rod 202 are damaged or destroyed.

That is, the rotary excavation body support portion 12 supports the rotary excavation body 10 in a rotatable manner, and is supported by the inner surface (support surface 72 and concave groove 68) of the leading pipe 2A and parallel to the rotation center line L of the rotary excavation body 10. The vertical excavator 10 is configured to be able to swing with the rotary excavator 10 in a direction orthogonal to the upper and lower inner surfaces of the leading pipe 2A. Swing in a direction perpendicular to the upper and lower inner surfaces.
That is, the vertical swing driving means 100 includes a hydraulic cylinder 101 as a swinging actuator serving as a drive source for swinging the rotary excavation body support unit 12 and an actuator installation unit 102. Reference numeral 102 denotes a front frame 103 connected to the rear end of the rotary excavator support 12 (the rear end face 106 of the cylindrical support 31) and the rear end (the connection flange 120 on the rear side of the rear connection 119). And a rear frame 104 to which a front end (front coupling flange 204) of a propulsive force transmission rod-like body 202 as a propulsive force transmission medium, which will be described later, is coupled.
The front frame 103 includes an upper connecting member 114 and a lower connecting member 115 as connecting members, a pin 123 as a shaft provided on the upper connecting member 114, and a shaft provided on the lower connecting member 115. The rear frame 104 includes a front vertical portion 116 as a connecting portion extending in a direction orthogonal to the upper and lower inner surfaces of the top tube 2A, and extends in the extending direction of the front vertical portion 116. The upper elongated hole 121 and the lower elongated hole 122 are formed, and the pin 123 and the pin 124 provided on the upper coupling member 114 and the lower coupling member 115 of the front gantry 103 are the front longitudinal elongated portion 116 of the rear gantry 104. The upper long hole 121 and the lower long hole 122 are connected to each other so as to be movable.
Further, the hydraulic cylinder 101 is attached to the lower connecting member 115 so that one of the cylinder side end 108 and the piston rod side end 109 is a cylinder side end 108 as a connecting member of the front pedestal 103, In addition, the piston rod side end portion 109 which is the other of the cylinder side end portion 108 and the piston rod side end portion 109 is rotatably attached to a hydraulic cylinder fixing portion 117 as a connecting portion of the rear pedestal 104.
Then, the upper long hole 121 and the lower long hole 122 of the rear pedestal 104 are extended along an arc centering on the rotation support portion 71 that becomes the rotation center when the cylindrical support 31 is vertically swung. Is formed.

  As described above, the vertical swing driving means 100 is configured, and by operating the hydraulic cylinder 101, the shaft 123 provided on the upper connecting member 114 of the front pedestal 103 and the lower connecting member 115 are provided. The pin 124 as the shaft portion moves in the upper long hole 121 and the lower long hole 122 of the rear gantry 104, and the front gantry 103, the rotary excavation body support portion 12, and the rotary excavation body 10 move the rotation support portion 71. The rotary excavator 10 is configured to be able to swing in a direction orthogonal to the upper and lower inner surfaces of the top pipe 2A by rotating as a center of rotation, and propulsive force from a propulsion drive source described later is transmitted as propulsive force. The pipe 2 is propelled by being applied to the rotary excavator 10 and the top pipe 2A via the propelling force transmission rod 202 as a medium, the actuator installation section 102, and the rotary excavator support section 12. It is possible to be installed in the ground.

As shown in FIG. 7, the succeeding pipe connected to the rear end of the leading pipe 2 </ b> A is a protrusion 131 that contacts the rear surface 130 of the rear longitudinal portion 118 of the rear frame 104 and prevents the excavating machine 4 from moving backward. It is provided so as to protrude from the left and right inner surfaces of 2B.
Accordingly, when the excavating machine 4 is propelled upward, the protrusion 131 supports the rear surface 130 of the rear elongated portion 118 of the rear gantry 104, so that the excavating machine 4 can be prevented from moving downward (falling). .
In addition, the said protrusion is comprised by the volt | bolt etc. which were attached to the screw hole part outside a figure provided in the right-and-left inner surface of the succeeding pipe | tube 2B etc., for example, when setting the excavating machine 4 to the top pipe 2A, or excavating machine In the case of propelling 4 downward, etc., it can be removed. That is, the protrusion is removed because it becomes an obstacle when the excavating machine 4 is set on the leading pipe 2A, and is unnecessary when the excavating machine 4 is pushed downward.

By providing the vertical swing driving means 100, the rotary excavator 10 can be swung in the vertical direction with reference to the center line 2c of the leading pipe 2A, and the vertical width of the leading pipe 2A in front of the leading pipe 2A. Since the natural ground 10A can be excavated at a wider vertical interval than the interval, the leading pipe 2A can be smoothly promoted. That is, prior to the advancement of the leading pipe 2A, a cross-sectional area wider than the sectional area of the leading pipe 2A can be excavated in front of the leading pipe 2A, and an extra moat in front of the leading pipe 2A becomes possible. Even if the natural ground 10A is hard ground, the leading pipe 2A can be smoothly propelled in the ground.
Further, the propulsion direction of the leading pipe 2A can be adjusted up and down by swinging the rotary excavator 10 upward or downward with the center line 2c of the leading pipe 2A as a reference.
Further, it is possible to deal with a case where it is desired to excavate only the upper side in front of the front pipe 2A or a case where it is desired to excavate only a lower side in front of the front pipe 2A.

As shown in FIG. 9, the left / right swing drive means 150 includes a left / right swing actuator 151 serving as a drive source for swinging the rotary excavator 10 to the left and right, and an actuator installation portion.
The left / right swinging actuator 151 is constituted by, for example, a hydraulic cylinder (hereinafter referred to as a hydraulic cylinder 151).
Two hydraulic cylinders 151 are provided, one on each of the left end side and the right end side behind the support substrate 30.
As shown in FIG. 9, the left hydraulic cylinder 151 has a piston rod side end 152 and a movable connecting means 154 whose upper and lower central sides on the rear surface 153 of the support substrate 30 as an actuator installation portion are movable like a hinge. And the cylinder side end 155 and the vertical center side of the rear longitudinal member 111 of the left front gantry 103 as the actuator installation portion are connected by a movable connecting means 156 such as a hinge.
Similarly, the right hydraulic cylinder 151 is connected to the piston rod side end 152 and the right upper and lower central side of the rear surface 153 of the support substrate 30 as an actuator installation portion by a movable connecting means 154 such as a hinge. Further, the cylinder side end portion 155 and the vertical center side of the rear longitudinal member 111 on the right front gantry 103 as the actuator installation portion are connected by a movable connecting means 156 such as a hinge.
That is, the hydraulic cylinder 151 has a cylinder side end 155 arranged on the left or right side of the pipe 2, a piston rod side end 152 arranged on the center side of the pipe 2, and a center line from the left or right side of the pipe 2. By being arranged obliquely so as to extend to the center side of the pipe 2, the space on the center side of the pipe 2 can be widened, and a sufficient space for handling the water supply / drain pipe 91, the pressure hose 23, etc. can be secured. Become.
In FIG. 6, when the piston rod 157 of the left hydraulic cylinder 151 is extended and the piston rod 157 of the right hydraulic cylinder 151 is retracted, the left end portion of the support substrate 30 moves to the front side and is supported. Since the right end portion of the substrate 30 moves to the rear side, the rotary excavation body 10 swings to the right side.
Further, in FIG. 6, when the piston rod 157 of the right hydraulic cylinder 151 is extended and the piston rod 157 of the left hydraulic cylinder 151 is retracted, the right end portion of the support substrate 30 moves forward and is supported. Since the left end portion of the substrate 30 moves to the rear side, the rotary excavation body 10 swings to the left side.

That is, the rotation center line L of the rotary excavator 10 is parallel to the upper and lower inner surfaces which are one pair of inner surfaces of the leading pipe 2A facing each other in parallel, and is perpendicular to the propulsion direction F of the leading pipe 2A. By including the left / right swing drive means 150 that is set to cross in a state other than orthogonal, the rotary excavator 10 can be swung in the left / right direction with respect to the center line 2c of the top pipe 2A. Since the natural ground 10A can be excavated at a width width interval wider than the horizontal width interval of the leading pipe 2A in front of the pipe 2A, when the leading pipe 2A is propelled, the one end opening 2t of the leading pipe 2A becomes a hard layer of the natural ground 10A The possibility of collision is reduced, and the front pipe 2A can be smoothly driven. That is, prior to the advancement of the leading pipe 2A, a cross-sectional area wider than the sectional area of the leading pipe 2A can be excavated in front of the leading pipe 2A, and an extra moat in front of the leading pipe 2A becomes possible. Even if the natural ground 10A is hard ground, the leading pipe 2A can be smoothly propelled in the ground.
Further, the propulsion direction of the leading pipe 2A can be adjusted to the left and right by swinging the rotary excavator 10 leftward or rightward with respect to the center line 2c of the leading pipe 2A.
Further, it is possible to cope with a case where only the right side in front of the front pipe 2A is to be excavated with priority and a case where only the left side in front of the front pipe 2A is to be excavated with priority.

In the installation work of the pipe 2 in the underground 10, the work is performed while monitoring the deviation of the top pipe 2A and the subsequent pipes 2B, 2B.
When it is confirmed that the leading pipe 2A and the succeeding pipes 2B, 2B... Are deviated from the set position, for example, the vertical excavation driving means 100 is used to swing the position of the rotary excavator 10 in the vertical direction. After that, or by continuing the work while swinging the position of the rotary excavating body 10 in the vertical direction, or controlling the propulsive force by the hydraulic cylinder 200A of the propulsion device 5, the leading pipe 2A with respect to the design position And the deviation of the actual position of the succeeding tubes 2B, 2B.

In the water stop device 7, for example, one end opening edge 161 of the cylinder of the tubular water stop member 160 formed of a stretchable material such as rubber is fixed to the inner peripheral surface on the front end side (one end opening side) of the leading pipe 2 </ b> A. Then, the other end opening edge 162 of the cylinder of the cylindrical water-stopping member 160 is fixed to the outer peripheral edge 163 side of the front surface 44 of the support substrate 30, so that the cylindrical water-stop member 160 is on the front side of the support substrate 30. Is configured to prevent water from moving to the rear side of the support substrate 30.
That is, by providing the water stop device 7, when the support substrate 30 swings left and right and the rotary excavation body 10 swings left and right, the tubular water stop member 160 expands and contracts, and the support substrate 30. When the cylindrical support 31 is swung in the front-rear direction and the rotary excavator 10 is swung in the vertical direction, the intrusion of water between the tube and the tubular support 31 is prevented. By preventing water from entering between 31 and the support tube 63, movement of water from the front side of the support substrate 30 to the rear side of the support substrate 30 is prevented.

  As shown in FIG. 10, the fixing portion 165 of the one end opening edge 161 of the cylinder of the tubular water blocking member 160 is a central axis of the support pipe 63 from a position in front of the annular mounting groove 73 on the inner peripheral surface of the support pipe 63. An annular fixing portion 166 provided so as to protrude toward the front surface, a holding plate 168 that presses one end opening edge 161 against the front surface of the annular fixing portion 166, and a set screw 171. The set screw 171 includes the holding plate 168 and one end. It is configured by passing through a through hole formed in the opening edge 161 and fastening to a screw hole formed in the front surface of the annular fixing portion 166.

  The fixing portion 175 of the other end opening edge 162 of the cylinder of the cylindrical water blocking member 160 includes an annular fixing portion 176 formed along the outer peripheral edge side of the front surface 44 of the support substrate 30, and the other end opening edge 162 as an annular fixing portion. 176 is provided on the front surface of the annular fixing portion 176 through a through-hole formed in the holding plate 178 and the other end opening edge 162. It is configured by being fastened to the screw hole.

  That is, when the rotary excavator 10 is swung in the left-right direction, the water stop device 7 swings the rotary excavator 10 in the up-down direction when the left and right sides of the support substrate 30 swing in the front-rear direction. At this time, when the upper and lower sides of the cylindrical support 31 swing in the front-rear direction, the cylindrical water stop member 160 expands and contracts to prevent water from moving from the front side of the support substrate 30 to the rear side of the support substrate 30. It is configured as follows.

The cylindrical water-stop member 160 is dried after, for example, immersing a mold having an outer periphery corresponding to the outer peripheral shape of the cylindrical support in a rubber stock solution to adhere a thin layer of rubber to the outer peripheral surface of the mold. The above operation is repeated several times to several tens of times, and a thin rubber layer is laminated on the outer peripheral surface of the mold to form a thin rubber cylinder (thickness of about several mm).
Thus, by using a rubber cylinder formed in a cylindrical shape as the cylindrical water-stopping member 160, the elastic movement of the cylindrical support 31 and the support substrate 30 is smoothed and stopped by the expansion and contraction of the rubber cylinder. The water stop device 7 excellent in water performance can be formed.
Further, as in the prior art, a waterproof rubber or the like is provided between the outer peripheral surface of the support substrate 30 and the inner peripheral surface of the cylindrical support 31 and between the inner surface of the top tube 2A and the outer peripheral surface of the cylindrical support 31. Since the frictional resistance between the outer peripheral surface of the support substrate 30 and the inner peripheral surface of the cylindrical support 31 is reduced, the swinging operation of the cylindrical support 31 and the support substrate 30 becomes smooth.
The tubular water blocking member 160 is made of rubber having an elasticity that is not broken even when pulled by the swinging of the rotary excavating body 10, and is tubular when contracted by the swinging of the rotary excavating body 10. It is attached in a state where there is a slack (margin) so as not to be caught between the inner surface 82 of the support 31 and the outer surface 83 of the support substrate 30.
For example, the other end opening edge 162 side, which is the smaller diameter side, is formed by using the cylindrical water-stop member 160 formed so that the diameter on the one end opening edge 161 side of the cylinder is larger than the diameter on the other end opening edge 162 side of the cylinder. Is fixed to the annular fixing portion 176 formed along the outer peripheral edge side of the front surface 44 of the support substrate 30, and the one end opening edge 161 side, which is the larger diameter side, is larger in diameter than the annular fixing portion 176. The cylindrical support 31 is fixed to the annular fixing portion 166 on the inner peripheral surface side of the cylindrical excavator 10 in a state where it is not easily broken even when pulled by the swing of the rotary excavator 10 and is contracted by the swing of the rotary excavator 10. It is possible to configure a water stop portion that is configured so as not to be caught between the inner surface 82 and the outer surface 83 of the support substrate 30.
That is, the other end opening edge 162 side which is the small diameter side of the cylindrical water blocking member 160 is fixed to the support body 14, and the one end opening edge 161 side which is the large diameter side of the cylindrical water stopping member 160 is the leading pipe 2A. By fixing to the inner peripheral surface of the rotary excavator 10, a water-stop portion is configured that is difficult to tear even when pulled by the swing of the rotary excavator 10 and that does not loosen too much when the rotary excavator 10 is contracted by the swing of the rotary excavator 10. It becomes possible.

  By providing the water stop device 7, regardless of the state of the support substrate 30, the muddy water including the excavation gap taken into the front surface 44 side of the support substrate 30 is in contact with the outer peripheral surface of the support substrate 30 and the cylindrical support 31. It is possible to prevent the rearward movement of the support substrate 30 via the inner peripheral surface of the support substrate 30 and the mud containing the excavation slip taken in the front surface 44 side of the support substrate 30 and the outer peripheral surface of the cylindrical support 31. It is possible to prevent movement to the rear of the support substrate 30 via the space between the inner peripheral surface of the leading pipe 2A.

  In addition, since the other end opening edge 164 side of the cylindrical water blocking member 160 is fixed to the outer peripheral edge 163 side of the front surface 44 of the support substrate 30, a large amount of excavation gap can be taken in front of the front surface 44 of the support substrate 30. Therefore, the efficiency of drainage can be improved.

As shown in FIG. 6, the propulsion device 5 is transmitted to the cylindrical support 31, the propulsion drive source (not shown), the propulsive force transmission means 200 that transmits the propulsive force generated by the propulsion drive source to the cylindrical support 31. The tube side support portion 32 is provided as a propulsion force receiving portion that transmits the propulsive force to the leading tube 2A.
That is, by transmitting the propulsive force from the propulsion drive source to the cylindrical support 31 via the propulsive force transmitting means 200 and rotating the rotary excavator 10, the rotary excavator 10 is propelled forward and the cylindrical The propulsive force transmitted to the support 31 is transmitted to the leading pipe 2A through the propelling force receiving portion, and the leading pipe 2A propels forward.

The propulsion drive source includes, for example, a hydraulic cylinder (propulsion jack) 200A (see FIG. 1) as an actuator.
The tube-side support portion 32 as a propulsive force receiving portion is configured by a concave wall 70 of a concave groove 68 that receives a columnar protrusion 66 provided on the left and right outer surfaces of the cylindrical support 31.

The propulsive force transmission means 200 includes a propulsive force transmission component 201, a propulsive force transmission rod 202, and a buckling prevention member 203.
The propulsive force transmission configuration unit 201 is configured by the actuator installation unit 102 described above, for example.
The propulsive force transmission rod-like body 202 has a configuration in which, for example, connecting flanges 204 and 204 are provided at both ends of an H-shaped steel.

As shown in FIG. 12, the buckling prevention member 203 is a member that prevents buckling of the propulsive force transmission rod-like body 202, and is formed in the left-right direction (the left and right inner surfaces of the subsequent pipe 2B Left and right connecting rod-like bodies 205, which are provided to extend in a direction orthogonal to or intersecting with a pair of inner surfaces) of the left and right propelling force transmitting rod-like bodies 202, 202, and a left propelling force transmitting rod-like body 202. It is in contact with the left propulsive force transmission rod 202 on the inner side and extends in the vertical direction (a direction perpendicular to or intersecting with the upper and lower inner surfaces of the subsequent tube 2B (one pair of inner surfaces facing each other of the subsequent tube 2B)). A left elongated portion 206 that is provided and connected to the left end side of the left and right connecting rods 205 and the right propulsive force transmitting rod 202 in contact with the right propelling rods 202 to extend vertically. Established in The right vertical portion 207 connected to the right end of the left and right connecting rod 205, the upper left and right connecting rod 208 connecting the upper end of the left vertical portion 206 and the upper end of the right vertical portion 207, and the left vertical portion 206. Lower left and right connecting rod-like bodies 209 that connect the lower end portion of the right-side vertically elongated portion 207, and left and right connecting rod-like bodies 205 provided at the left and right ends of the left and right connecting rod-like bodies 205 at the time of recovery to the starting base, Left and right interference reducing members 210 and 210 for reducing interference with the left and right inner surfaces of the succeeding pipe 2B, and the left and right longitudinal portions 206 and the right and left longitudinal portions 207 are provided at both upper and lower ends, and left longitudinally when recovered to the departure base. Part 206, right vertically long part 207, upper left and right connecting rod-like body 208, lower left and right connecting rod-like body 209 and upper and lower interference reducing members 211 and 211 for reducing interference between the upper and lower inner surfaces of the succeeding pipe 2B. That. In addition, each member which comprises the buckling prevention member 203 is formed, for example with a shape steel.
By providing the buckling prevention member 203, the right and left propulsive force transmission rod-like bodies 202, 202 connected to the rotary excavation body support portion 12 by being connected to the rear end of the actuator installation portion 102 are propulsion drive sources. When the thrust from the hydraulic cylinder is applied, the buckling prevention member 203 or the buckling prevention member 203 in contact with the inner surface of the succeeding pipe 2B buckles the left and right thrust transmission rods 202, 202. By resisting the force to be caused, buckling of the left and right propulsive force transmission rods 202, 202 can be prevented, and the propulsive force applied by the hydraulic cylinder is transmitted to the propulsive force transmission component 201 (actuator installation unit). 102) can be reliably transmitted to the rotary excavator 10 and the top pipe 2A.

  The left and right interference reduction members 210 and 210 and the upper and lower interference reduction members 211 and 211 include an outer surface 212 formed in a curved shape, and the curved outer surface 212 is provided so as to face the inner surface of the subsequent pipe 2B. It is done. The left and right interference reducing members 210 and 210 and the upper and lower interference reducing members 211 and 211 are formed in a curved shape in which both end sides of the steel plate are bent in the same direction as shown in FIG. 62, for example. It arrange | positions so that the inner surface of the succeeding pipe | tube 2B may be opposed. Therefore, by bringing the curved outer surface 212 into contact with the inner surface of the succeeding pipe 2B, it becomes possible to reduce the frictional resistance at the time of recovery for recovering the propulsive force transmitting rod 202 to the starting base, and the propulsive force transmitting rod The collection work for returning 202 to the departure base can be easily performed.

The water supply / drainage device 6 includes two water supply / drainage pipes 91, 91, a water storage tank (not shown), a water supply pump (not shown) for supplying water from the water storage tank to the water supply / drainage pipe, and a water discharge mud (not shown). A tank and an unillustrated pump for drained mud water that sucks the discharged mud through a water supply / drain pipe and discharges it into the mud tank.
That is, by connecting one of the water supply / drainage pipes 91 and the water supply pump to drive the water supply pump and supplying water to one of the water supply / drainage pipes 91, the front space of the support substrate 30 is pressurized, The muddy water in the front space of the support substrate 30 is discharged to the muddy tank by connecting the water supply / drain pipe 91 and the muddy water pump to drive the muddy water pump.
Further, by connecting the other water supply / drain pipe 91 and the water supply pump to drive the water supply pump to supply water to the other water supply / drain pipe 91, the front space of the support substrate 30 is pressurized, The muddy water in the front space of the support substrate 30 is discharged to the muddy tank by connecting the water supply / drain pipe 91 and the muddy water pump to drive the muddy water pump.
That is, one of the water supply / drainage pipes 91 is used as a water supply pipe or as a mud drainage pipe, and the other water supply / drainage pipe 91 is used as a drainage mud water pipe or as a water supply pipe. That is, by using the two water supply / drain pipes 91 and 91 as appropriate as a water supply pipe or a drainage mud pipe, it is possible to prevent uneven distribution of muddy water in the front space of the support substrate 30. Thus, the movement of the support substrate 30 and the cylindrical support 31 during swinging and the movement of the support substrate 30 and the cylindrical support 31 during propulsion are not hindered.

Next, a method for installing the pipe 2 in the ground by the pipe installation device 1 will be described.
First, the excavating machine 4 is set on the top pipe 2A. For example, an assembly in which the cylindrical support 31, the support substrate 30, and the connection base 34 are assembled is inserted from the rear end opening of the top tube 2 </ b> A, and the left and right cylindrical protrusions 66, 66 of the cylindrical support 31 are inserted. By inserting it into the left and right concave grooves 68, 68 of the support pipe 63, it is set in the leading pipe 2A.
Note that when the left and right curved convex surfaces of the support substrate 30 are configured to slide with the left and right curved concave surfaces of the cylindrical support 31, the cylindrical support 31 includes, for example, separate left side plates, right side plates, and upper plates. And the lower plate are connected by welding or the like. That is, the upper and lower circular protrusions 86, 86 of the support substrate 30 are inserted into the circular holes 87, 87 formed in the upper plate and the lower plate of the cylindrical support 31, and the left side of the cylindrical support 31. The upper end of the left side plate of the cylindrical support 31 and the upper plate are connected by welding or the like while the curved concave surface of the plate is in contact with the left curved convex surface of the support substrate 30, and the lower end of the left side plate of the cylindrical support 31 is connected. Connect the lower plate by welding. Similarly, the upper end of the right side plate and the upper plate of the cylindrical support 31 are connected by welding or the like while the curved concave surface of the right side plate of the cylindrical support 31 is in contact with the right curved convex surface of the support substrate 30. The lower end of the right side plate of the cylindrical support 31 and the lower plate are connected by welding or the like. Thus, an assembly in which the support substrate 30 is assembled inside the cylindrical support 31 is formed.

After the assembly of the cylindrical support 31, the support substrate 30, and the connection frame 34 is set on the top pipe 2 </ b> A, the column unit 33 of the rotary excavation body 10 is connected to the connection frame 34 to support the rotary excavation body 10. The external pressure-resistant hose 23 is connected to the connection portion 23 </ b> A provided at the rear end opening of the hollow support portion 35, connected to the front surface of the substrate 30. Further, the one end opening edge 161 of the cylindrical water-stopping member 160 is fixed to the inner peripheral surface on the distal end side (one end opening 2t side) of the leading pipe 2A, and the other end opening edge 162 of the cylindrical water-stopping member 160 is fixed to the support substrate. The water stop device 7 is configured by being fixed to the outer peripheral edge 163 side of the front surface 44 of 30. Further, the actuator installation portion 102 in which the hydraulic cylinder 101 and the hydraulic cylinder 151 are installed is connected to the rear end surface 106 of the cylindrical support 31, and the piston rod side end portion 152 of the hydraulic cylinder 151 is connected to the rear surface 153 of the support substrate 30. It connects via the connection means 154, and connects the water supply / drainage pipe 91 to the water supply / drainage pipe holding through hole 90 of the support substrate 30. Then, the pressure hose 23 is connected to a hydraulic pressure source, and the water supply / drain pipe 91 is connected to the pump.
Thus, the start preparation for the leading pipe 2A is completed.

  The excavator 3 is assembled by inserting the left and right cylindrical protrusions 66 and 66 of the cylindrical support 31 of the excavator 3 into the left and right concave grooves 68 and 68 of the support pipe 63 after the entire excavator 3 is assembled. May be set in the leading pipe 2A.

  Next, the right and left connecting flanges 120 and 120 positioned at the rear end of the actuator installation portion 102 are pressed by hydraulic cylinders 200A and 200A as propulsion drive sources, respectively, and the rotary excavator 10 is rotated, thereby rotating excavation. The body 10 and the top pipe 2A are propelled from the starting base into the ground. That is, the natural ground 10A is excavated by the rotation of the rotary excavator 10, and the actuator installation portion 102 is pressed, so that the propulsive force generated by the pressure in the hydraulic cylinder 200A is changed to the actuator installation portion 102 (propulsion transmission component). 201), the cylindrical support body 31, the cylindrical protrusion 66, and the concave wall 70 (tube side support portion 32) are transmitted to the leading pipe 2A, and the actuator installation portion 102, the cylindrical support body 31, and the support substrate are connected. Since it is transmitted to the rotary excavation body 10 via the gantry 34 and the column 33 of the rotary excavation body 10, the leading pipe 2A advances into the ground.

Then, before the leading pipe 2A travels completely into the ground, the trailing pipe 2B is connected to the rear end of the leading pipe 2A in the departure base.
Further, while the left and right connecting flanges 120, 120 located at the rear end of the actuator installation portion 102 protrude rearward from the rear end opening of the succeeding pipe 2B, the right and left connecting flanges are respectively provided with propulsive force transmission rods. The body 202 is connected. The leading pipe 2A and the succeeding pipe 2B are further advanced by pressing the left and right connecting flanges 204, 204 positioned at the rear end of each propulsive force transmission rod-like body 202 with the hydraulic cylinders 200A, 200A. Then, before the subsequent pipe 2B travels completely into the ground, the subsequent subsequent pipe 2B is further connected to the rear end of the subsequent pipe 2B in the departure base.

  Thereafter, while the left and right connecting flanges 204 and 2401 positioned at the rear end of each propulsive force transmission rod-like body 202 protrude rearward from the rear end opening of the succeeding pipe 2B, the left and right connecting flanges 204 and 204 are connected. Are connected to the propulsive force transmission rod-like body 202, the rearmost propulsive force transmission rod-like body 202 is pressed to further advance the leading pipe 2A and the succeeding pipe 2B, and the rearmost succeeding pipe 2B is completely underground. 2, by repeating the operation of connecting the succeeding subsequent pipe 2B to the rear end of the rearmost succeeding pipe 2B in the departure base, the leading pipe 2A and the plurality of succeeding pipes 2B following the leading pipe 2A are repeated. For example, a pipe body that functions as a support work or the like can be installed in the ground.

After the pipe installation work is completed, the excavating machine 4 and the like are pulled back to the starting base and collected. At this time, since the rotary excavator 10 is slowly rotated before the recovery operation of the rotary excavator 10 is performed, the detection means 8 can detect that the rotary excavator 10 is in a recoverable state. 4 and the like can be collected quickly and accurately.
In addition, when the rotary excavation body 10 reaches | attains the arrival base outside a figure, after cut | disconnecting the cylindrical water stop member 160 in the said arrival base, the excavation machine 4 etc. are pulled back to a start base, and are collect | recovered. Further, when the excavating machine 4 and the like are pulled back from the ground to the starting base and collected in a state where the rotary excavator 10 does not reach the arrival base (not shown), the tubular water blocking member 160 is used when the excavating machine 4 and the like are pulled back. It is made to break by pulling (removing) and collecting.

  In the above description, assuming that the front surface of the annular fixing portion 166 provided on the inner peripheral surface of the leading pipe 2A is regarded as the inner peripheral surface of the leading tube 2A, one end opening of the tubular water blocking member 160 is formed on the front surface of the annular fixing portion 166. Although the example in which the edge 161 is fixed is shown, the one end opening edge 161 of the tubular water blocking member 160 may be directly fixed to the inner peripheral surface of the leading pipe 2A without providing the annular fixing portion 166.

In addition, the buckling prevention member is provided so as to extend in the vertical direction and is connected to the left propulsive force transmission rod-like body, and the left longitudinally extending portion is provided so as to extend in the vertical direction so that the right propulsive force transmission rod is provided. Right and left connecting rods that connect the right vertical part connected to the body, and the left and right vertical parts and the right vertical part, or the left and right connecting rods that connect the left propulsion transmission rod and the right propulsion transmission rod It is good also as a structure provided with the body.
That is, the left vertical portion 206 shown in FIG. 12 is connected to the left propulsive force transmission rod 202, the right vertical portion 207 is connected to the left propulsion rod 202, and the left vertical portion 206 is connected. It is good also as a structure provided with the buckling prevention member which has the right-and-left connecting rod-shaped body which connects the right-side vertically long part 207, or the left-right connecting rod-shaped body which connects the said right and left propulsive force transmission rod-shaped bodies 202,202.
Even when the buckling prevention member is provided, buckling of the propulsive force transmission rod 202 can be prevented when the propulsive force from the propulsion drive source is applied to the right and left propulsion rods 202, 202. The propulsive force applied by the propulsion drive source can be reliably transmitted to the rotary excavation body 10 and the top pipe 2A.

Further, the interference reducing member is provided so as to protrude toward the left inner surface side of the pipe from the left propulsive force transmission rod-like body, and the left propulsive force transmission rod-like body and the left inner surface of the pipe at the time of recovery to the starting base The left interference reduction member that reduces interference with the right propulsion force transmission rod, and the right propulsion force transmission rod shape that protrudes toward the right inner surface of the tube than the right propulsion force transmission rod It is good also as a structure provided with the right interference reduction member which reduces interference with a body and the right inner surface of a pipe | tube.
That is, the left thrust reducing member 210 shown in FIG. 12 protrudes from the left thrust transmitting rod 202 toward the left inner surface of the succeeding tube 2B, or the left thrust transmitting rod 202 or the left The right propulsive force transmission rod-shaped body is provided on the vertically long portion 206 and protrudes from the right propulsive force transmission rod-shaped body 202 toward the right inner surface side of the succeeding pipe 2B. It is good also as a structure provided in 202 or the right longitudinally long part 207.
Even when the interference reducing member is provided, it is possible to reduce the frictional resistance at the time of recovery when the propulsive force transmission rod-shaped body 202 is recovered to the starting base, and the recovery work for returning the propulsive force transmitting rod-shaped body 202 to the starting base is facilitated. You can do it.

  In the embodiment, the detection sensor 8 using the magnet 51 and the Hall IC 52 is exemplified as the detection means 8 for detecting that the rotary excavation body 10 is in a recoverable state. The detection means of the method may be used.

  In the embodiment, the shaft 123 includes the pin 123 and the pin 124, and the upper long hole 121 and the lower long hole 122. The pin 123 and the pin 124 pass through the upper long hole 121 and the lower long hole 122. The structure connected so as to be movable, that is, the structure having two connecting parts in which the pin and the long hole are connected is exemplified, but the connecting part in which the pin and the long hole are connected is one or more. I just need it.

The buckling prevention member 203 may be provided with one buckling prevention member 203 on the propulsive force transmission rod 202 each time the subsequent propulsion force transmission rod 202 is connected. One buckling prevention member 203 may be provided every time a plurality of rod-like bodies 202 are connected. For example, one buckling prevention member 203 may be provided each time two subsequent propulsive force transmission rod-like bodies 202 are connected.
In addition, the shape, material, and the like of the buckling prevention member 203 are not particularly limited as long as the rigidity of the propulsive force transmission rod 202 can be improved.
Further, the propulsive force transmission medium may not be a rod-shaped body.

  In addition, you may use the excavation machine 4 provided with the rotary excavation body 10 or 3 or more.

  Moreover, the pipe | tube 2 should just be a thing with a square cross-sectional shape. In addition, the cross-sectional shape referred to in the present invention is a quadrangular shape such as a cross-sectional rectangle, a cross-sectional square, and a cross-sectional trapezoid, and includes a shape in which square corners are chamfered.

Further, the left and right sides of the leading pipe 2A may be propelled in the vertical direction.
Moreover, it is good also as a pipe | tube installation apparatus of the structure which makes the support substrate 30 rock | fluctuate in an up-down direction, and rocks the cylindrical support body 31 in the left-right direction.

1 pipe installation device, 2 pipes, 2A leading pipe (pipe), 2B following pipe (pipe), 5 propulsion device,
10 rotating excavated body, 10A ground, 14 support body, 15 connecting strut part,
100 vertical swing drive means (swing drive means), 310 display screen, L rotation center line,
X2 tilt sensor (tilt detection means), X3 stroke meter.

Claims (7)

While using the rotary excavator to push the rotary excavator from behind with the propulsion unit while excavating natural ground, the pipes that are sequentially added to the back of the rotary excavator are propelled and installed in the ground using a pipe installation device. A pipe condition monitoring method when installing the
Inclination detecting means for detecting the inclination angle of the pipe is attached to the leading pipe connected to the rotary excavator, and the inclination of the pipe is attached to one or more of the succeeding pipes sequentially connected behind the leading pipe. A tilt detection means for detecting the angle is attached,
The condition of the pipe being installed in the ground is characterized by monitoring the underground state of the pipe being promoted based on the actual measurement values continuously measured by each inclination detection means during the promotion of the pipe. Status monitoring method.   An inclination detecting means for detecting the inclination angle of each pipe is attached to all the succeeding pipes sequentially connected to the rear of the leading pipe. Status monitoring method.   Based on the design positions of the first and subsequent pipes to be installed in the ground, the amount of propulsion from the entrance to the ground of the pipe into the ground of the pipe, and the measured value of the inclination angle measured by the inclination detection means The calculated actual positions of the leading pipe and the subsequent pipe being propelled are simultaneously displayed on the same display screen, when the pipe according to claim 1 or 2 is installed in the ground. Pipe condition monitoring method.   The method for monitoring the state of a pipe when the pipe is installed in the ground according to claim 3, wherein the amount of propulsion from the entrance to the natural ground of the pipe to the underground of the pipe is measured with a stroke meter. Obtain the design evaluation value based on the design value of the inclination angle every time the leading pipe and the succeeding pipe to be installed in the ground are propelled for a certain distance, and incline every time the leading pipe and the succeeding pipe being propelled propel a certain distance. Obtain a measured evaluation value based on the measured values of the inclination angle of the leading pipe and the succeeding pipe obtained from the detection means,
The pipe according to any one of claims 1 to 3, wherein the difference between the design evaluation value and the actual measurement evaluation value of the leading pipe and the subsequent pipe is obtained and displayed on the display screen. How to monitor the condition of pipes when installing.   The design height of the pipe is calculated based on the standard and design value determined arbitrarily by the design evaluation value, and the pipe is calculated based on the standard determined by the measured evaluation value and the actual measured value of the inclination angle of the pipe. The method for monitoring the state of a pipe when the pipe according to claim 5 is installed in the ground.   The pipe installation device includes a front pipe having a rectangular cross section, a rotary excavator that rotates on a rotation center line that is positioned in front of one end opening of the front pipe and intersects the propulsion direction of the front pipe, and an inner surface of the front pipe A support body supported on the base, a connecting strut portion whose base end side is connected to the support body and rotatably supports the rotary excavation body, and one pair of the rotary excavation body facing each other in the height direction of the top pipe It is characterized by comprising a swing drive means for driving so as to be swingable in a direction orthogonal to the inner surface, and a propulsion device for applying a propulsive force to the leading pipe and the rotary excavator through the support. The pipe | tube state monitoring method at the time of installing the pipe | tube as described in any one of Claim 1 thru | or 6 in the ground.

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