JPH09178480A - Measuring device in jacking method and measuring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and precisely measure a position of a leading element or a buried pipe in a jacking method, in particular in a curved jacking method. SOLUTION: A laser beam irradiating part 40 comprises a rotary light irradiating means such as a rotary irradiating part 42 for rotating the irradiating direction of a measuring laser beam within a vertical plane, and a horizontal swiveling means such as a turntable 30 for horizontally swiveling the rotary irradiating means. A laser beam receiving part 50 receives the laser beam. An angular detecting means composed of a rotary encoder 36 or the like is detects a swivel angle of the horizontally swiveling means at the time when the light receiving means receives a laser beam emitted from the rotary light irradiating means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveying method and a surveying apparatus in a propulsion method, and more particularly, to laying a buried conductor by propelling a front conductor and a buried pipe sequentially connected to the rear of the conductor. The present invention relates to a device for measuring the position of the leading conductor or the buried pipe in the propelling method.

[0002]

2. Description of the Related Art In the propulsion method, from the side wall of a shaft excavated from the ground surface to the ground, a front conductor equipped with an excavation mechanism, a ground consolidation mechanism, and the like, and a buried pipe that is sequentially connected behind the front conductor are placed in the ground. I will promote it. Therefore, it is not possible to visually confirm the position and orientation of the conductor and the buried pipe propelling in the ground from the ground surface. However, in order to lay a buried pipe according to the designed laying route, it is necessary to accurately know the positions of the lead conductor and the buried pipe even during the construction of the propulsion method, and change the propulsion direction of the lead conductor as necessary. .

Therefore, various methods have been proposed for measuring the positions of the leading conductor and the buried pipe during construction of the propulsion method. For example, the laser light emitted from the laser irradiator arranged in the shaft is reflected by the reflector arranged in the front conductor and is received again by the light receiver in the shaft, so that the direction of the reflector, that is, the front conductor. There is a way to know the direction of. Also, if one end of a wire or the like is attached to the back portion of the lead conductor and the wire is paid out from the vertical shaft into the buried hole as the lead conductor is propelled, the length or direction of the drawn wire causes the lead conductor to move. You can know the propulsion distance or direction.

[0004]

The surveying method as described above is useful when the lead conductor and the buried pipe are propelled in a linear direction. However, as the propulsion method, in addition to the linear propulsion method, there is a curved propulsion method in which the lead conductor and the buried pipe are propelled along a curved path. In the curve propulsion method,
Since the laser beam cannot be bent along the curved path and reflected by the reflector of the leading conductor, the surveying method using the ordinary laser beam cannot be applied. Even with wire measurements, the exact distance and direction cannot be determined if the wire bends along a curved path.

When the diameter of the buried pipe is large, a worker is inside the buried pipe, and the same surveying as above is performed for each line-of-sight distance where the laser light and the wire reach linearly in the inner space of the buried pipe. It is also possible to know the position and direction of the leading conductor by carrying out and sequentially integrating the survey results. However, it is very troublesome to perform the above-mentioned surveying work for each line-of-sight distance in the internal space of the narrow buried pipe, and it takes a long working time, which causes the workability of the entire propulsion method to be deteriorated. Also,
If the diameter of the buried pipe is so small that no worker can enter it, the above surveying work cannot be performed.

Furthermore, as another problem, it is troublesome to adjust the irradiation direction of the laser light in order to accurately apply the laser light to the reflector and the light receiver. In the buried pipe line laid by the propulsion method, it is unavoidable that the height shift or variation occurs in the vertical direction depending on the location.
Even if an attempt is made to bend the propelling direction in a horizontal plane, bending often occurs at the same time in the vertical direction as well, so that the work of adjusting the irradiation direction of the laser light as described above is absolutely necessary.

Conventionally, an operator manually adjusts the irradiation direction on the side of the laser light irradiator up, down, left or right, or automates such a manual operation by using a driving device such as a motor.
The laser light was made to hit the reflector and the light receiver in the front. The manual adjustment work of the irradiation direction is very troublesome and the workability is poor. Moreover, in the case of the buried pipe having a small diameter as described above, the operator cannot perform the work of entering the buried pipe and adjusting the irradiation direction of the laser light. Even if an attempt is made to mechanize or automate a mechanism for accurately irradiating a reflector or a light receiver with laser light, if the surveying device itself becomes large, it cannot be applied to the small-diameter pipe as described above.

An object of the present invention is to enable easy and accurate measurement of the direction and position of a lead conductor or a buried pipe in a propulsion method, especially a curved propulsion method.

[0009]

A surveying device in a propulsion method according to the present invention is a propulsion method for laying a buried conductor by propelling a front conductor and a buried pipe sequentially connected to the rear of the conductor into the ground. In, the device for measuring the position of the leading conductor or the buried pipe. A laser beam irradiation unit, a laser beam receiving unit, and an angle detection unit are provided. The laser irradiation unit
It has a rotating light irradiating means for irradiating the laser beam for optical surveying by rotating the irradiation direction in a vertical plane, and a horizontal rotating means for horizontally rotating the rotating light irradiating means. The laser light receiving section receives the laser light. The angle detecting means detects a turning angle of the horizontal turning means when the laser light emitted by the rotating light emitting means is received by the light receiving means.

As the basic structure of the lead conductor and the buried pipe and the concrete construction method of the propulsion method, various structures or construction methods of the lead conductor and the buried pipe used in the usual propulsion method can be applied. Incidentally, in the present invention, a narrow caliber, that is, a small-caliber propulsion method in which it is difficult for an operator to enter the interior of the buried pipe and perform surveying, or a curved propulsion method in which the buried pipe is propelled according to a curved path. It is preferable to apply it, but of course, it can be applied to a large-diameter propulsion method.

The leading conductor is various excavation mechanisms, an earth discharging mechanism for discharging the excavated earth and sand backward, a muddy water supply mechanism for spraying muddy water on the ground to accelerate the excavation of the ground, and the ground is directed to the outer circumference of the leading conductor. A pressing mechanism that expands the buried hole through which the leading conductor passes, a pressure medium supply mechanism, power supply mechanism, communication cable, etc. for operating these mechanisms and detecting and controlling the operating state of each mechanism. The information transmission mechanism, the propulsion force transmission shaft for transmitting the propulsion force from the rear propulsion jack, and the like are provided as necessary. For the leading conductor,
A turning mechanism may be provided to adjust the propulsion direction of the lead conductor.

As the buried pipe, a pipe made of an appropriate pipe material such as a steel pipe, a concrete pipe, a fume pipe, a synthetic resin pipe or the like is used according to the purpose of construction. Inside the buried pipe, the above-mentioned mud water supply / discharge pipe, hydraulic / pneumatic pipe, power cable, propulsion force transmission shaft, etc. can be arranged. The buried pipe is sequentially connected to the rear of the front conductor and is propelled. A connecting mechanism for connecting the buried pipes can be provided at a connecting portion between the buried pipes. In the curve propulsion method, a turning mechanism that changes the axial direction of the front and rear buried pipes at the joint between the buried pipes can be provided.

As the basic structure of the surveying instrument, a structure similar to that of an ordinary laser surveying instrument can be adopted. The structure itself of the laser light irradiator and the light receiver is not particularly limited, and usual conditions suitable for optical surveying are adopted as the usage conditions such as the wavelength and intensity of the laser light. The rotating light irradiating means of the laser light irradiating section is provided with a laser light irradiator, and the laser light irradiator is rotated by a rotation driving means such as a motor, or the laser light irradiating from a fixed laser light irradiator is supplied. It suffices that the irradiation direction be rotated and continuously changed via an optical system such as a mirror or a prism driven by a motor or the like. The irradiation direction of the laser light is rotated in the radial direction within the vertical plane. The rotation in the irradiation direction may be one that continuously rotates in one direction, one that repeats forward and reverse rotation, or one that swings and rotates only within a certain angle range.

The horizontal turning means is such that the rotating light irradiation means as described above is attached to a horizontally rotatable turntable, or the optical system such as a polygon mirror is driven while the main body of the laser light irradiation device is fixed. Then, the irradiation direction of the laser light may be turned in the horizontal direction simultaneously with the rotation in the vertical plane. The laser light receiver is
It suffices that the laser beam emitted from the laser beam irradiation unit can be received and detected, and the structure of the light receiving unit in a normal laser surveying device can be adopted. The laser light receiver is
It is arranged in a surveying device installed in a place different from the surveying device provided with the laser light irradiation unit, and laser light irradiation and light reception are performed between both surveying devices. However, by providing both the laser light irradiation unit and the laser light receiving unit in one surveying device, the same surveying device can be used for both irradiation and reception of laser light. The laser beam receiver may be provided with a laser beam reflector so that the laser beam reflected by the laser beam reflector is received by the laser beam receiver provided in the surveying device on the side irradiated with the laser beam. Good. Information on the laser beam received by the laser beam receiver is output as electrical information.

If the angle detecting means can detect the turning angle of the horizontal turning means at that time when the laser light is received by the light receiving means based on the received light information, the rotation angle detecting mechanism in various mechanical devices can be used. Can be adopted. Specifically, a device such as a rotary encoder that can accurately detect the turning angle of a rotating object is used. From the turning angle of the horizontal turning means detected by the angle detecting means, the irradiation direction of the laser light at that time can be known. If the irradiation direction of the laser light is known, the angular position in the horizontal direction of the laser light receiving unit with respect to the laser light irradiation unit can be known, and the horizontal direction between the surveying device equipped with the laser light irradiation unit and the surveying device equipped with the laser light receiving unit The angular positional relationship at is determined.

A posture adjusting means for adjusting the horizontal posture of the laser beam irradiation section may be further provided. The attitude adjusting means moves the attitude of the laser light irradiating section by moving an arbitrary position up and down or changing the overall inclination with respect to a supporting member that supports the rotating light irradiating means, the horizontal turning means, the angle detecting means, and the like. It suffices to be able to adjust the horizontal position, and various posture adjusting mechanisms in ordinary mechanical devices can be adopted. If the attitude of the laser light irradiation unit is adjusted by the attitude adjustment means, the laser light emitted from the rotating light irradiation means accurately rotates in the vertical plane, the horizontal turning means accurately turns in the horizontal direction, and the angle detection means It is possible to obtain an accurate horizontal turning angle, and an accurate survey result can be obtained.

Distance measuring means for measuring the distance between the plurality of surveying devices can be further provided. As the distance measuring means, a physical distance measuring device such as a stainless wire winding type digital measure, a non-contact type distance measuring device using ultrasonic waves, radio waves, light, etc. A measuring mechanism can be adopted. In addition to the angle detection function described above, a distance measurement function can be incorporated in the laser light irradiation unit and the laser light reception unit.

It is possible to further comprise an information transmitting means for transmitting information on the turning angle detected by the angle detecting means to the outside. If the information of the turning angle detected by the angle detecting means of the surveying device installed on the leading conductor or the buried pipe is transmitted to the rear shaft or the ground by information transmitting means such as electric cable or optical communication, The position of the lead conductor and the buried pipe can be easily known based on the information. The information transmitting means can also transmit the distance information measured by the distance measuring means.

When a plurality of surveying devices are arranged in the row of the leading conductor and the buried pipe, the information of the turning angle transmitted from the plurality of surveying devices is processed to calculate the leading conductor or the buried pipe. If a calculation processing means for calculating the position is further provided, it is possible to sequentially measure the position from the reference point installed in the shaft or the like to the surveying device in front, and to know the position to the leading conductor. As the arithmetic processing means, a computer provided with an ordinary arithmetic processing unit, a storage unit, a display unit, an output unit and the like is used. The measurement result of the positions of the lead conductor and the buried pipe obtained by the arithmetic processing means can be sent to a control device that controls the lead conductor propulsion operation, and the lead conductor propulsion operation can be corrected or adjusted.

The surveying method in the propulsion method according to the present invention is a propulsion method in which a lead conductor and an embedded pipe sequentially connected to the rear of the former conductor are propelled into the ground to lay the embedded pipe. A method of measuring the position of the leading conductor or the buried pipe by using the method, comprising the following steps. A step of arranging the surveying device at intervals in the column direction on the front conductor and the buried pipe for propelling in the ground. In a set of surveying devices arranged adjacent to each other in the row direction,
A step of causing the laser light receiving section of the other surveying device to receive the laser light emitted from the rotating light irradiating means of one surveying device, and detecting the turning angle of the horizontal turning means in the one surveying device at that time. . From the information of the turning angle,
Obtaining the angular position in the horizontal direction of the other surveying instrument with respect to the one surveying instrument.

The surveying instrument can be installed in the lead conductor and all the buried pipes, or can be installed in each of the lead conductor and the plurality of buried pipes. Specifically, at least one of the buried pipes arranged in the line-of-sight range capable of irradiating and receiving laser light at the time of construction of the propulsion method needs to be equipped with a surveying device. Regarding the line-of-sight range, the smaller the radius of curvature of the propulsion path, the shorter the line-of-sight range. Therefore, in the curved propulsion method, the intervals at which the surveying devices are installed may be set according to the curvature of the propulsion path.

The surveying device may be placed inside the leading conductor and the buried pipe at a position where it does not hinder the installation of required equipment. It is preferable that the surveying instrument is installed so that it can be removed from the buried pipe after the construction of the propulsion method. In particular,
It is preferable to install a surveying device on a mud pipe and a propulsion shaft which are placed in the buried pipe and removed after the construction. A surveying device can be installed on the inner wall of the buried pipe in a relatively large diameter buried pipe, and a worker can enter the buried pipe for installation and removal work. Surveying equipment
Before propelling the lead conductor and the buried pipe into the ground, if it is installed on the lead conductor or the buried pipe on the ground or in the shaft,
Easy installation of surveying equipment.

When detecting the turning angle between the adjacent surveying devices, usually, the surveying device on the rear side of the buried pipe array emits the laser beam and the surveying device on the front side receives the laser beam. It is preferable to obtain the angle information of the front surveying device with respect to the rear surveying device. The distance measurement described above is also preferably performed sequentially from the rear surveying device to the front surveying device. In addition, the surveying device at the rearmost part can be accurately surveyed by detecting its angle and distance with respect to a reference point that is installed in a vertical shaft and whose accurate position can be easily surveyed. Accurate measurement is possible for the position of the device. However, it is also possible to irradiate the laser beam from the surveying device on the front side and receive the laser beam on the surveying device on the rear side to obtain the position information of the surveying device on the rear side with reference to the surveying device on the front side.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shown in FIG. 1 is applied to a curve propulsion method. A vertical rectangular shaft H is excavated from the ground surface perpendicular to the ground E. In the horizontal direction from the side wall of the shaft H, the buried pipe row T and the tip conductor P at the tip thereof are connected to the ground E.
Being promoted within.

An extraneous survey station 100 is installed at a predetermined position on the propulsion reference line in the vertical shaft H, and the buried pipe row T
A plurality of in-pipe surveying stations 10 are installed at predetermined intervals. The diameter of the buried pipe in which such an in-pipe surveying station 10 can be installed is, for example, 400 mm
mm or more, and when using a temporary tube, caliber 250
Applicable up to about 350 mm.

Each surveying station 10, 100 is connected to a communication control composite cable 14 via a relay unit 12, respectively. At the location of the relay unit 12, the communication control composite cable 14 can be freely attached and detached. This cable 14 is the survey station 1
It supplies power to 0 and 100, transmits signals for controlling operation, and transmits detected survey information. The cable 14 is a communication control unit 16 installed on the ground.
It is connected to a personal computer (PC) 18 via, and the survey information is processed by the PC 18. A printer 19 is connected to the PC 18 to print out surveying information.

Optical receivers 11a and 11b are arranged on the front conductor P at two positions, a rear end and a center, along the central axis, and the optical receivers 11a and 11b are connected to a cable 14 via a relay unit 12. ing. An inclination sensor 13 is also installed on the leading conductor P. Reference point light receivers 11c and 11d are installed on the propulsion reference line before and after the extra-vein surveying station 100.

[In-pipe surveying station] FIGS. 2 and 3
The in-pipe surveying station 10 shown in FIG. 2 is installed so as to straddle the mud sending pipe 2 and the mud discharging pipe 3 which pass side by side under the inner space of the buried pipe row T. In the surveying station 10, a fixed base 20 fixed to the mud pipe 2 and the mud pipe 3 and a fixed base 2
It has a turntable 30 horizontally rotatably mounted above 0, a laser irradiation device 40 supported below the turntable 30, and a light receiver 50 mounted above the turntable 30.

A horizontal adjustment shaft 22 is erected on three sides of the fixed base 20, and a mounting base 24 is supported above the horizontal adjustment shaft 22. Each horizontal adjustment shaft 22 is driven by a motor 23, and the support position of the upper end of the horizontal adjustment shaft 22 on the mount 24 can be adjusted up and down. By adjusting the support position of the mounting base 24 up and down, the inclination of the mounting base 24 with respect to the horizontal plane can be adjusted.

The turntable 30 is mounted on the upper surface of the mount 24 so as to be horizontally rotatable by a drive motor 32. Therefore, the tilt of the turntable 30 can be adjusted by adjusting the tilt of the mounting base 24. Turntable 30
A two-axis inclinometer 34 is installed in the vehicle and can detect the pitching and rolling direction inclination of the turntable 30. A rotary encoder 36, which is coaxially connected to the mounting base 24, is attached to the turntable 30 to detect a horizontal turning position of the turntable 30.

The laser irradiation device 40 has a laser oscillator, an optical system for guiding laser light, and the like inside. At one end of the laser irradiation device 40, a disk-shaped rotary irradiation unit 42 extending in the horizontal direction and rotated by a motor or the like is provided. A laser irradiation port 43 is opened on the outer peripheral surface of the rotary irradiation unit 42, and laser light is irradiated from the laser irradiation port 43 in the radiation direction. When the rotary irradiation unit 42 rotates, the irradiation direction of the laser light rotates within the vertical plane. The rotation axis of the rotary irradiation unit 42 is arranged so as to be orthogonal to the rotation axis C of the turntable 30.

The light receiver 50 is arranged on a vertical plane in which the irradiation direction of the laser light rotates, and at a position facing in the diametrical direction of the turntable 30, and a light receiving portion is provided below the outer surface of the light receiver 50. 52 are arranged. The light receiver 50 is
Different light receiving signals are emitted when the laser light is received at the center of the light receiving portion 52 and the positions on the left and right sides thereof. As a result, when the laser light is received near both ends of the light receiving portion 52 which is wide in the left and right, it is known that the center of the light receiving portion 52 is located closer to the center than the position.

A communication control unit 26 is attached to the lower portion of the fixed base 20, and is connected to a device such as a laser irradiation device 40 and is connected to the cable 14 described above. The fixed base 20 has a wire type distance meter 28.
A measuring wire 29 is pulled out from the wire type distance meter 28, and the distance to the tip of the measuring wire 29 can be measured.

[Exterior Survey Station] FIGS. 4 and 5
The external structure of the external surveying station 100 shown in FIG. 9 is the same as that of the internal surveying station 10 described above, and includes a fixed base 20, a turntable 30, and a laser irradiation device 4.
0, a light receiver 50, and the like. A description will be given mainly of a structural part different from the in-pipe surveying station 10.

A tripod 21 is attached to the bottom of the fixed base 20, and is installed on the floor of the shaft H. Mounting stand 24
On the lower surface of the turntable 30, a bracket 27 having a rectangular parallelepiped frame shape mounted on the central axis of the horizontal rotation of the turntable 30 has a weight ball 210 hanging toward the ground, and the lower end of the weight ball 210 is placed on the floor. By adjusting to the reference point of
Installation and adjustment of the surveying station 100 can be performed. A wire distance meter 28 is provided below the fixed base 20.

The fixed base 20 has a horizontal moving base 201 whose position can be adjusted in the horizontal direction by a horizontal adjusting screw 202. A mounting base 24 is supported on the horizontal moving base 201 via a horizontal adjustment shaft 22, and a turntable 30 is supported on the mounting base 24 so as to be horizontally rotatable. The horizontal adjustment shaft 22 is not driven by a motor but is manually rotated to move up and down. Instead of the inclinometer 34, two levelers 35 are installed on the turntable 30 in the pitching direction and the rolling direction, and perform the same function as the inclinometer 34.

The light receiver 50 is installed only at one position on the outer circumference of the turntable 30 in the laser irradiation direction. [Basic Surveying Method] FIGS. 6 and 7 show a method of performing surveying between a pair of surveying stations 10 and 10 using the surveying station 10 (or 100) as described above.

As shown in FIG. 6, two surveying stations 10A and 10B are arranged at intervals. When the turntable 30 is horizontally rotated with respect to the mounting base 24 of the one surveying station 10A, the laser irradiation device 40 horizontally swivels. As a result, the irradiation direction of the laser beam L emitted from the laser irradiation port 43 of the laser irradiation device 40 changes in the horizontal plane. Assuming the XY axis directions fixed to the mount 24, the angle θ formed by the X axis direction and the irradiation direction of the laser light L is determined. This angle θ is the turntable 30
This is detected by the rotary encoder 36 that detects the turning angle of the.

In the other surveying station 10B as well, when the turntable 30 is rotated with respect to the mounting base 24, the direction of the light receiving portion 52 of the light receiver 50 installed on the turntable 30 changes. Therefore, survey station 1
When the direction of the light receiving portion 52 of the surveying station 10B is also changed in the horizontal direction while changing the irradiation direction of the laser light L emitted from 0A in the horizontal direction, the laser light L enters the light receiving portion 52 and is received at any position. It

If the direction of the surveying station 10A is roughly known from the surveying station 10B side, the turntable 3 is located near the direction of the surveying station 10A.
The direction in which the laser light L can be received by the light receiving section 52 may be searched by swinging 0 to the left and right. As described above, the laser light L from the surveying station 10A is received by the light receiving section 52 of the surveying station 10B, and at the same time, the laser light L is also emitted from the surveying station 10B and is received by the light receiving section 52 of the surveying station 10A. The laser light L is received.

When the laser light L is received by the light receiving portions 52 of both the surveying stations 10B and 10A, the rotation of the turntable 30 of the surveying stations 10A and 10B is stopped. In this state, the turning angle θ of the turntable 30 in the surveying station 10A indicates the direction of the existing position of the surveying station 10B with respect to the X axis fixed to the surveying station 10A.

The wire 29 of the wire type range finder 28 provided in the surveying station 10A or the surveying station 10B.
To the other end of the survey station 10B or 10
If extended to A, both survey stations 10A, 1
You can see the distance between 0B. The position of the surveying station 10B with respect to the surveying station 10A is specified by knowing the angle θ in the direction in which the surveying station 10B exists with respect to the surveying station 10A and its distance.

In this way, the survey station 10A
If the position of the surveying station 10B with respect to is measured, then the direction and distance of the surveying station 10 arranged at another position are measured with reference to the surveying station 10B. In this way, the position of each surveying station 10 can be measured by sequentially measuring the plurality of surveying stations 10 arranged at intervals.

However, in the above-described method, when the rotary irradiation unit 42 does not rotate and the laser light L is rotated and irradiated only in the horizontal direction, the laser irradiation port 4 of the surveying station 10A is used.
Surveying can be performed only when 3 and the light receiving section 52 of the surveying station 10B are on the same horizontal plane. That is,
As shown in FIG. 7, when the laser irradiation port 43 and the light receiving unit 52 are misaligned in the height direction, the laser light L irradiated in the horizontal direction from the laser irradiation port 43 has different height positions. No light is received at 52.

Therefore, as shown in FIG. 7, in the laser irradiation device 40 of the surveying station 10A, the laser light L is irradiated from the laser irradiation port 43 while rotating the rotary irradiation unit 42 within the vertical plane. The irradiation direction of the laser beam L is in all directions of the radiation direction with the rotation axis as the center. As a result, the laser light L emitted in either direction is captured by the light receiving unit 52 of the surveying station 10B. Laser light L
Is received by the light receiving section 52, as shown in FIG.
The turning angle θ of the turntable 30 of the surveying station 10A may be detected.

The rotary irradiation unit 42 of the surveying station 10A
The laser beam L is received by the light receiving section 52 of the surveying station 10B at any position by horizontally rotating the turntable 30 in the procedure described with reference to FIG. Then, the turning angle θ at that time is surely detected. [Propulsion method] An outline of the propulsion method will be described.

In FIG. 1, first, the front conductor P is propelled from the side wall of the shaft H to the ground E. In the vertical shaft H, a source push jack (not shown) is arranged behind the tip conductor P, and a propulsion force is applied to the tip conductor P from the source push jack. At this time, the light receivers 11a and 11b and the inclination sensor 13 are attached to the front conductor P, and the cable 14 is also connected. Next,
One buried pipe constituting the buried pipe row T is connected behind the front conductor P in the vertical shaft H, and the buried pipe and the front conductor P are propelled into the ground E by using the original push jack again. By repeating the connection of the buried pipe to the tail end of the buried pipe row T and the propulsion by the original pushing jack, the front conductor P and the buried pipe row T are propelled into the ground E, and the buried pipe row T is moved to the ground E. Is laid.

As shown in FIG. 1, when propelling along the curved path, the direction of propulsion of the front conductor P is changed by operating the deflection mechanism provided in the front conductor P. Then, the subsequent buried pipe row T connected to the leading conductor P also bends along the propulsion path of the leading conductor P. While carrying out such a propulsion method, the surveying station 10 is mounted and the cable 14 is connected at fixed intervals of the buried pipe row T. However, when connecting a new buried pipe to the tail end of the buried pipe line T, the cable 14 connected to the surveying station 10 in the front buried pipe line T is temporarily disconnected at the relay unit 12. Then, a new buried pipe is connected to the tail end or the surveying station 10 is attached, and then the cable 14 is connected to the relay unit 12 again. In this way, at any stage of the propulsion construction, the desired surveying work can be performed with the cable 14 connected to the surveying station 10 installed inside the leading conductor P and the buried pipe row T. Further, the cable 14 does not interfere with the work of connecting the buried pipe.

[Specific Surveying Method] As shown in FIG. 1, the front conductor P and the buried pipe row T are propelled to a certain distance, and the front portions of the front conductor P and the buried pipe row T are laid in a curved shape. At this stage, the procedure of surveying will be described. Using the surveying station 100 arranged in the vertical shaft H, the reference point photodetectors 11c and 11d are irradiated with the laser light L rotatably emitted from the laser irradiation port 43, and the direction of the reference point photodetector 11c with respect to the surveying station 100 is changed. Ask.
The direction X ₀ of the reference point light receiver 11c is used as a reference axis for subsequent surveys.

Next, the direction and distance of the surveying station 10-1 in front of the surveying station 100 are obtained.
Specifically, the angle θ ₀ with respect to the X ₀ axis and the distance are obtained. As a result, the position of the surveying station 10-1 is specified.
In addition, surveying station 10-1 also surveying station 1
The direction of 00 is detected and stored. The surveying station 10-1 is located at a position where the laser light L from the surveying station 100 arrives linearly, that is, within the line-of-sight range.

At the surveying station 10-1, the direction and distance of the surveying station 10-2 further ahead are obtained, and the deflection angle from the first surveying station 100 is obtained. Surveying station 1 for the direction X ₁ axis connecting the measuring station 100 and the surveying station 10-1 stored in the previous stage
The angle θ _{1 in the} 0-2 direction is determined, and the survey station 1
The 0-2 position is identified. At this time, the surveying station 10-2 is arranged in the middle of the curved path of the buried pipe row T, but exists in a range which can be seen straight from the surveying station 10-1. Similar to the above, the survey station 10-2
Then, the direction of the surveying station 10-1 is detected and stored.

Similarly, the angle θ ₂ and the distance in the direction from the surveying station 10-2 to the surveying station 10-3 are obtained, and the position of the surveying station 10-3 is specified. By repeating such surveying for each surveying station 10, the position of each measuring station 10 over the entire length of the buried pipe array T is specified from the information of the angle θ and the distance.

State-of-the-art survey station 1 of buried pipe line T
From 0-3, two light receivers 11 arranged on the front conductor P
The angles θ ₃₁ and θ ₃₂ representing the directions of a and 11b and the distance are measured. In this way, the light receiver 1 at the two locations of the front conductor P
By performing surveying on 1a and 11b, not only the position of the leading conductor P but also the direction of the central axis of the leading conductor P can be specified. The direction of the central axis of the leading conductor P indicates the direction in which the leading conductor P is propelled.

As described above, the positions of the plurality of surveying stations 10 and the leading conductors P arranged in the buried pipe row T are measured. The information detected by each surveying station 10 is input to the PC 18 via the cable 14, the above-mentioned arithmetic processing is performed, and the surveying result is output to the monitor of the PC 18 or the printer 19. Looking at the survey results, if the position and the driving direction of the leading conductor P are not as designed, the leading conductor P
A command for controlling the operation of the vehicle may be sent to correct the propulsion direction. In addition, the difference between the survey result and the design route is detected by the PC1.
It is also possible to perform programming in 8 so that it is programmed so that control commands for modifying the operation of the leading conductor P are automatically sent.

[0055]

According to the surveying instrument of the present invention, since the laser beam irradiating section for performing the laser surveying is provided with the rotating light irradiating means, there is a deviation in the height direction from the light receiving section to be surveyed. Even if there is, the laser light can be reliably applied to the light receiving portion. Moreover, the direction of the laser beam when the laser beam is received by the light receiving section, that is, the direction of the survey target is detected by the angle detecting means. As a result, it becomes possible to automatically perform surveying using a surveying device installed inside a small-diameter buried pipe into which a worker cannot enter.

According to the surveying method of the present invention, the positions of specific points of the front conductor and the buried pipe are simply and accurately surveyed by the surveying device arranged at intervals in the row direction of the front conductor and the buried pipe. It will be possible.

[Brief description of the drawings]

FIG. 1 is an overall structural diagram of a surveying system that represents an embodiment of the present invention.

[Figure 2] Front view of the in-pipe survey station

FIG. 3 is a side view of the above.

[Figure 4] Front view of the external survey station

FIG. 5: Side view of the above

FIG. 6 is a plan view schematically showing the surveying method.

FIG. 7 is a side view of the above.

[Explanation of symbols]

 10 In-pipe survey station 14 Composite cable for communication control 22 Horizontal adjustment axis 28 Wire distance meter 30 Turntable 36 Rotary encoder 40 Laser irradiation device 42 Rotation irradiation unit 43 Laser irradiation port 50 Light receiver 52 Light receiving unit 100 External measurement station P Leader Body T buried pipe row

Claims (8)

[Claims] 1. A device for measuring a position of the lead conductor or the buried pipe in a propulsion method of laying the buried pipe by propelling a lead conductor and a buried pipe successively connected behind the lead conductor in the ground. A laser light having a rotating light irradiating means for irradiating the laser light for optical surveying by rotating the irradiation direction in a vertical plane, and a horizontal rotating means for horizontally rotating the rotating light irradiating means. An irradiating section, a laser beam receiving section for receiving the laser beam, and an angle detecting section for detecting a turning angle of the horizontal turning section when the laser beam emitted by the rotating light irradiating section is received by the light receiving section. Surveying equipment. 2. The surveying instrument according to claim 1, further comprising posture adjusting means for adjusting a horizontal posture of the laser beam irradiation section. 3. The surveying instrument according to claim 1, further comprising distance measuring means for measuring a distance between the plurality of surveying instruments. 4. The surveying instrument according to claim 1, further comprising information transmitting means for transmitting information on the turning angle detected by said angle detecting means to the outside. 5. The method according to claim 1, further comprising arithmetic processing means for arithmetically processing the information of the turning angle transmitted from the plurality of surveying devices to calculate the position of the lead conductor or the buried pipe. The surveying instrument described in Crab. 6. A surveying method according to any one of claims 1 to 6, wherein in a propulsion method of laying the buried pipe by propelling a front conductor and a buried pipe sequentially connected to the rear of the conductor into the ground. A method of measuring the position of the tip conductor or the buried pipe using a device, the step of arranging the surveying device at intervals in the column direction of the tip conductor and the buried pipe propelled in the ground, In one set of surveying devices arranged adjacent to each other in the row direction, the laser light emitted from the rotating light irradiation means of one surveying device is received by the laser light receiving section of the other surveying device, and at that time, Of detecting the turning angle of the horizontal turning means in the one surveying device, and obtaining the angular position in the horizontal direction of the other surveying device with respect to the one surveying device from the information of the turning angle. Measurement Method. 7. The surveying method according to claim 6, further comprising the step of measuring a distance between the surveying devices in the one set of surveying devices. 8. The method according to claim 6, wherein the step of arranging the surveying device sets a distance between the front and rear surveying devices within a line-of-sight range on a curved path in a column direction of the leading conductor and the buried pipe. Survey method described in crab.