JP2014025231A - Pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe that enables a grouting material to be injected into ground on the outside of the pipe, even after concrete is embedded in the pipe.SOLUTION: A pipe for being installed in ground includes a pipe body 2A, and a hollow pipe 101 which is provided in such a manner that a pipeline is extended along an extension direction of the pipe body 2A on an outside surface 2b of the pipe body 2A. In addition, the pipe body is formed of a quadrangular cross-section pipe; the pair of hollow pipes is provided at a regular interval; and the hollow pipe is provided in such a manner that the pipeline is extended throughout a length in the extension direction of the pipe body on one of the outside surfaces of the pipe body.

Description

  The present invention relates to a tube having a rectangular cross section installed in the ground.

Conventionally, it is a pipe installation device for installing a pipe having a square cross section in the ground, and a rotary excavator that rotates around a rotation center line orthogonal to the propulsion direction of the pipe is provided inside the front side of the pipe. In addition, there is also known a tube installation device having a configuration in which a blade tube larger than the outer diameter of the tube is provided at the tip of the tube, and overcutting is performed by the blade tube (for example, (See Patent Document 1; 2 etc.).
In addition, in order to prevent the tip of the pipe from colliding with the hard ground and not proceeding, the rotary excavator is installed in front of the top opening of the pipe, and the rotation center line of the rotary excavator is connected to the pipe. The rotary excavator is set in a state that is parallel to one pair of outer surfaces facing each other in parallel and intersects with a surface other than perpendicular to a surface orthogonal to the propulsion direction of the tube, and the other of the rotary excavator is parallel to each other The excavating machine swing drive device that can be moved to the outside of the pair of outer surfaces is provided, and the rotary excavator is swung in front of the pipe prior to the progress of the pipe so that it is wider than the cross-sectional area of the pipe. The present applicant has filed an application for a pipe installation device that allows the cross-sectional area to be excavated (overexcavated) so that the pipe can be smoothly propelled in the ground even when the ground is hard ground ( Japanese Patent Application No. 2011-244272 .

JP 2011-52528 A JP 2012-117275 A

When excessive digging is performed by the blade pipe of the pipe installation device disclosed in Patent Documents 1 and 2, or by the rotary excavation body of the pipe installation device having the swingable rotary excavation body described above, the excessive excavation is performed. In this case, if the next pipe is installed in the ground so that it is lined up next to the pipe installed in the ground first, the pipe installed in the ground first and the pipe installed in the ground in the destination A gap, that is, an underground gap is formed between the next pipe installed in the ground so as to be lined up, and in this case, an injection material such as a chemical solution is inserted into the underground gap from the inside of the pipe. Inject to form a water stop treatment section.
However, for example, when the excavation machine or the like is pulled back and collected in the cavity on the starting side that is the starting point of excavation, the pipe may be filled with concrete so that groundwater does not enter the pipe. In this case, there is a problem that the injection material cannot be injected from the inside of the pipe to the ground outside the pipe.
The present invention provides a pipe that can inject an injection material into the ground outside the pipe even after the concrete is buried in the pipe.

According to the pipe according to the present invention, the pipe is installed in the ground, and is a pipe body and a hollow provided on the outer surface of the pipe body so that the pipe line extends along the extending direction of the pipe body. Since the pipe is provided, the injected material can be injected into the ground outside the pipe using the hollow pipe as the injection pipe even after the concrete is buried in the pipe body.
The tube body is formed by a tube having a square section, and the hollow tube is provided on one outer surface of the tube body so that the pipe line extends over the entire length in the extending direction of the tube body. Even after the concrete is buried in the tube body, the injection material can be injected into the ground outside the tube using the hollow tube as the injection tube.
Since the pair of hollow tubes are provided at a predetermined interval, the tubes are placed in the ground while making contact with or in close proximity to the outer surface of the tube main body of the tube previously installed in the ground. A pair of hollow tubes between the outer surface of the tube main body of one tube and the outer surface of the tube main body of the other tube installed in the ground so as to be adjacent to each other at an interval. And the outer surface of the tube main body of one tube and the outer surface of the tube main body of the other tube can form a highly sealed underground region, and the hollow tube is inserted into the underground region via a hollow tube. Since the injection material can be filled from the inside, the possibility that the injection material injected into the underground region will flow out of the underground region is reduced, and the water stop treatment can be ensured, and the injection amount of the injection material The construction cost can be reduced.
A tube having guide means on the outer surface opposite to the outer surface on which the hollow tube of the tube body is provided, and other tubes arranged side by side on the outer surface of the tube body of the tube installed in the ground Is installed in the ground, the hollow tube provided on the outer surface of the tube body of another tube is guided by the guide means provided on the outer surface of the tube body of the tube installed in the ground. Thus, since the traveling direction of the other pipe is guided when the other pipe is installed in the ground, the traveling direction of the other pipe can be accurately guided.
Since the guide means is provided so as to contact the outer surface of the hollow tube provided on the outer surface of the tube body of the other tube, when the other tube is installed in the ground, the other tube The direction of travel can be accurately guided.

Sectional drawing which shows the relationship between the guide means of a previous pipe | tube, and the collision prevention means of the following pipe | tube. The figure which shows the installation procedure of a pipe | tube. The perspective view which shows the support construction method by a front pipe and a succeeding pipe. The disassembled perspective view which decomposes | disassembles and shows a pipe | tube, a guide means, and a collision prevention means. The perspective view which shows the pipe | tube provided with the guide means and the collision prevention means. The cross-sectional view of a pipe installation apparatus. The longitudinal cross-sectional view of a pipe installation apparatus. The figure which looked at the rear surface side of the rocking | fluctuation board | substrate from the back side (AA sectional view equivalent figure of FIG. 7). The perspective view which shows the internal structure of a top pipe. The figure which shows the rocking | fluctuation state of a rotary excavation body. Sectional drawing which shows the structure of a water stop process part.

Embodiment 1
As shown in FIGS. 1 to 5, the pipe 2 according to the first embodiment installed in the ground 10 by the pipe installation device 1 described later includes a pipe body 2A having a square cross section and one outer surface 2b of the pipe body 2A. A pair of hollow tubes 101; 101 provided at regular intervals so that the pipe line extends along the extending direction of the tube body 2A, and an outer surface facing one outer surface 2b of the tube body 2A It is the structure provided with the guide means 120 provided in 2a.

The tube main body 2A is a curved tube formed so that the tube bends and extends so as to draw an arc (the center line of the tube (the center point of the cross section perpendicular to the tube extension direction is continuous along the tube extension direction). A straight line (a pipe whose center line is a straight line) that extends straight and is perpendicular to the center line (center axis) of the pipe A cross-sectional shape when the tube is cut is formed by a square tube.
For example, a steel pipe is used as the pipe body 2. The size of the tube body 2 is, for example, when the tube body 2A is a tube having a rectangular cross section, the length of the tube (the length in the direction along the central axis of the tube) is 1500 mm, and the width of the tube (the rectangular shape of the cross section). The length of the long side) is 1240 mm, the vertical width of the tube (the length of the short side of the rectangular cross section) is 690 mm, and the wall thickness of the tube is 16 mm.

  As the hollow tube 101, for example, a hollow tube 101 having an outer diameter of 75 mm × 75 mm and a wall thickness of 16 mm is used, and one outer surface 102 of the hollow tube 101 is used as the other outer surface of the tube body 2A. The hollow pipe 101 and the pipe main body 2A were fixed by a fixing means such as welding while being in contact with 2b, whereby a pipe line was formed by the hollow pipe line of the hollow pipe 101. For example, a hollow steel pipe is used as the hollow pipe 101.

The guide means 120 is constituted by a rail forming body, for example. For example, a long member 121 such as a steel plate having an L-shaped cross section is used as the rail forming body. The long member 121 having the L-shaped cross section is configured such that one long side edge side and the other long side edge side of the long plate are located at the center position of one short side edge of the long plate and the center of the other short side edge. The long side edge side surface 122 and the other long side edge side surface 123 are configured to form a right angle by being bent in a direction approaching each other via a straight folding line connecting the positions. Then, the long member 121 and the pipe body 2A are fixed by a fixing means such as welding in a state where the one long side edge side surface 122 is brought into contact with the one outer surface 2a of the pipe body 2A. The other long side surface 123 of the member 121 and the one outer surface 2a of the tube body 2A are configured to form a right angle. The long member 121 is fixed to one outer surface 2 a of the tube 2 so as to extend in parallel with the center line of the tube 2.
The length of the long side edge side surfaces 122; 123 of the long member 121 in the short direction is the same as the outer diameter of the hollow tube 101 serving as a duct forming body, or the outer diameter of the hollow tube 101 is A dimension shorter than the diameter dimension is formed.

  As shown in FIG. 4; FIG. 5, the long member 121 constituting the hollow tube 101 and the guide means 120 is, for example, the longitudinal direction of the outer surface 2a; 2b of the tube body 2A (ie, the tube body 2A). The outer side surfaces 2a and 2b are provided so as to extend over the entire length of the tube main body 2A. That is, the hollow tube 101 is constant with the long side edge 2g so that the pipe line extends along the long side edge 2g over the entire length in the extending direction of the tube main body 2A on the other outer surface 2b of the pipe main body 2A. Are provided at intervals. Further, the long member 121 constituting the guide means 120 is extended along the long side edge 2f over the entire length in the extending direction of the pipe main body 2A on the one outer surface 2a of the pipe main body 2A. 2f is provided at a constant interval.

One long member 121 is provided at a position close to both the upper and lower long side edges 2f; 2f on one outer side surface 2a of the tube main body 2A, so that the pair of long members 121; Guide means 120 is configured.
For example, the pair of long members 121; 121 is configured such that, for example, the other long side surface 123 of each long member 121 faces each other with a certain distance H1 between them. The one long side surface 122; 122 extends to the long side edge 2f; 2f side of one outer surface 2a of the tube body 2A so that the side surfaces 122; 122 are separated from each other. It is fixed to one outer surface 2a of 2A.

One hollow tube 101 is provided at a position close to both the upper and lower long side edges 2g; 2g on the other outer surface 2b of the tube main body 2A, and the hollow tubes 101 are provided at regular intervals. It is done.
The pair of hollow tubes 101 includes, for example, a long side edge 2g of the other outer surface 2b of the tube main body 2A in each hollow tube 101; an outer surface 103 at a position close to 2g; Are opposed to each other and the outer surfaces 104 of the other outer surface 2b of the tube main body 2A of each hollow tube 101 are close to the center between the long side edge 2g and the long side edge 2g; One outer surface 102 is fixed to the other outer surface 2b of the tube main body 2A so as to face each other across H3. The tube body 2A to which the hollow tube 101 is fixed has an outer surface 106 facing the outer surface 102 of the hollow tube 101 in parallel with the outer surface 2a of the tube body 2A previously installed in the ground 10. It installs in the underground 10 with the pipe installation apparatus 1 in the state of contact or proximity.
Each hollow tube 101; 101 fixed to the other outer surface 2b of the tube main body 2A is hollow through the tube wall to form the outer surface 104; 104 facing each other and facing each other. An inlet 105 with a check valve configured to have a check valve attached to a hole communicating with the inside and outside of the tube 101 to prevent the inflow of an object from the outside of the hollow tube 101 into the hollow tube 101 is provided. The injection material 200 can be injected into the above-described underground region 150 from the inside of the hollow tube 101 through the injection port 105 with the check valve.
In addition, the injection port 105 with a non-return valve is one in the hollow tube 101 provided in one tube main body 2A, or along the extension direction of the tube of the hollow tube 101 provided in one tube main body 2A. A plurality are provided at intervals.
In addition, the above-described inlet with the check valve is provided in each tube wall forming the long side edge 2g of the other outer surface 2b of the tube 2 in each hollow tube 101; the outer surface 103; 103 at a position close to 2g. Then, a back-up process in which a chemical solution or cement-based injection material is injected into the underground 10 around the outer periphery of the pipe 2 becomes possible.

The relationship between the intervals H1; H2; H3 is H1>H2> H3. For example, H1 is equal to or less than the length between the long side edges 2f; 2f of one outer surface 2a of the tube body 2A, and Each long side edge 2f is set to 2/3 or more of the length between 2f, and H3 is 1/3 or more of the long side edge 2g of the other outer surface 2b of the pipe body 2A; (See FIG. 1).
Specifically, H2 is set to be about several centimeters smaller than H1, and the long side edge 2g of the other outer surface 2b of the tube main body 2A in each hollow tube 101; Each of the long members 121 is configured to be able to come into contact with the other long side surface 123; 123, so that the propulsion direction of the next tube 2 in the underground 10 is a pair of hollow tubes 101; It is accurately guided by the pair of long members 121;

In the first embodiment, a pipe installation device 1 (see FIGS. 6 to 10) having a swingable excavating body 46, which will be described later, for installing the pipe 2 in the underground 10 is used. As shown, when the pipe 2 is installed in the underground 10 and then the next pipe 2 is installed in the underground 10 so as to be arranged next to the previous pipe 2 installed in the underground 10, The tube 2 of the next tube 2 installed in the underground 10 so as to be arranged next to one of the outer surfaces 2a of the pair of outer surfaces 2a; 2b of the tube body 2A of the tube 2 installed in the middle 10. A pair of hollow tubes 101; 101 are provided on the other outer surface 2b of the main body 2A, and the tube of the previous tube 2 to be installed in the ground 10 so as to be adjacent to each other with a space therebetween. Underground formed between one outer surface 2a of the main body 2A and the other outer surface 2b of the tube main body 2A of the next pipe 2 In the region 150, a chemical solution or cement-based injection material for water-stopping treatment between one outer surface 2a of the tube body 2A in the previous tube 2 and the other outer surface 2b of the tube body 2A in the next tube 2 Injecting material into the underground region 150 via the hollow tube 101 and the injection port 105 with a check valve provided in the hollow tube 101 when forming the water stop treatment part 200 (see FIG. 11) can be injected.
Further, the pipe body 2A of the pipe 2 previously installed in the underground 10 with the pair of hollow tubes 101; 101 provided on the other outer surface 2b of the tube body 2A of the next pipe 2; By placing the next tube 2 in the ground 10 in contact with or in close proximity to the outer surface 2a of the tube, a pair of hollow tubes 101; 101 and the outer surface 2a of the tube body 2A in the previous tube 2 and the next An underground region 150 having a high sealing property surrounded by the other outer surface 2b of the tube body 2A of the tube 2 can be formed, and the underground material region 150 having a high sealing property is filled with the injection material 200 to stop the water. Part can be formed. In this case, since the injection material 200 injected into the underground region 150 having high sealing performance does not flow out of the underground region 150, water can be reliably stopped, and further, an injection material for forming a water stop treatment portion can be used. The injection amount can be reduced, and the construction cost can be reduced.
Further, the next pipe 2 is installed in the underground 10 so as to be arranged next to the outer side surface 2a where the pair of long members 121; 121 of the pipe body 2A of the previous pipe 2 installed in the underground 10 is provided. In this case, the hollow tube 101; 101 provided on the outer surface 2b of the tube body 2A of the next tube 2 is provided on the outer surface 2a of the tube body 2A of the tube 2 previously installed in the ground 10. The pair of long members 121; That is, since the pair of long members 121; 121 is in contact with the outer surface 103; 103 of each hollow tube 101; 101 and guides each hollow tube 101; 101 so as to sandwich each hollow tube 101; When the next pipe 2 is installed in the ground 10, the traveling direction of the next pipe 2 can be accurately guided.
Further, by providing the pair of long members 121; 121, the pair of hollow tubes 101; 101, the pair of long members 121; 121, and one outer surface 2a of the tube body 2A in the previous tube 2 and the next Since the underground region 150 having higher sealing performance surrounded by the other outer surface 2b of the tube body 2A in the tube 2 can be formed, the injection material 200 injected into the underground region 150 flows out of the underground region 150. The possibility of doing this can be further reduced, and the construction cost can be further reduced.
The pair of hollow tubes 101; 101 swing the rotary excavator 46 when the next pipe 2 is installed in the ground 10 using the pipe installation device 1 having the swingable excavator 46. When the rotary excavator 46 is moved and moved outside the pair of outer surfaces 2a; 2b of the pipe body 2A in the pipe 2 in front of the pipe 2 (more precisely, the rotary excavator 46 is a pipe in the pipe 2) One of the pipe main bodies 2A in the pipe 2 in which the rotary excavation body 46 is first installed in the ground 10 when the pair of outer side faces 2a of the main body 2A is moved to the outside of the pipe main body 2A from the plane of advance of the 2b) In order to avoid colliding with the outer surface 2a of the tube, the tube 2 is installed in the ground 10 so as to be arranged next to the one outer surface 2a of the tube body 2A of the tube 2 previously installed in the ground 10 and the tube 2 of the tip. Necessary spacing between the other outer surface 2b of the tube body 2A of the next tube 2 Also functions as a collision prevention means for constant.

As shown in FIG. 3, the support 11 constructed in the underground 10 by the pipe installation device 1 and the pipe installation method of the first embodiment includes a pipe 2 positioned at the head (hereinafter referred to as a head pipe) and a plurality of subsequent ones. Tube 2 (hereinafter referred to as a subsequent tube). That is, the support work 11 is constructed by a leading pipe 6 that is a pipe 2 positioned at the leading end and a succeeding pipe 7 that is a plurality of succeeding pipes 2 provided so as to follow the leading pipe 6.
As the support work 11, a plurality of curved pipes are sequentially connected and installed in the underground 10, so that the support work 11 that bends and extends so as to draw an arc is constructed in the underground 10, or a plurality of straight pipes are provided. A support work 11 is constructed in the underground 10 that is connected in sequence and installed in the underground 10 to extend straight.
As the support work 11, the support work 11 constructed by continuously connecting a plurality of pipes 2 so as to straddle between one cavity portion and the other cavity portion outside the figure formed in the underground 10, Starting from an unillustrated cavity formed in 10, a support 11 constructed by continuously connecting a plurality of pipes 2 so as to return to the cavity, starting from an unillustrated cavity formed in the underground 10 Then, there is a support work 11 constructed so as to stop at the underground 10.

For example, as shown in FIG. 2A, a pipe 2 (a leading pipe 6 and a plurality of subsequent pipes 7) is installed in the underground 10 from a single cavity formed in the underground 10, and the first (first) The support structure 11A is constructed. Thereafter, the next pipe 2 (the leading pipe 6 and the plurality of succeeding pipes 7) is placed in the ground 10 so as to be arranged next to the pipe 2 (the leading pipe 6 and the plurality of succeeding pipes 7) forming the first support work 11A. Install and construct the second support 11B as shown in FIG. The dotted line in FIG. 2A indicates that the rotary excavator 46 is swung using the pipe installation device 1 so that the rotary excavator 46 is outside the pair of outer surfaces 2a; 2b of the pipe 2 in front of the pipe 2. The overexcavation range when moved to is shown.
A cross-section that forms guide means 120 provided on one outer side surface 2a of the pipe body 2A of the pipe 2 of the first support construction 11 that has already been constructed in the ground 10 when constructing the second support construction 11B. Between the L-shaped long members 121; 121, the other outer side of the pipe body 2 A of the leading pipe 6 for constructing the second support 11 to be put into the ground 10 from one hollow portion. Each hollow tube 101; 101 provided on the side surface 2 b is inserted and the outer surface 106; 106 of each hollow tube 101; 101 is connected to one outer surface of the tube body 2 A of the tube 2 of the first support 11. After positioning the leading pipe 6 so as to be in contact with or close to 2a, the pipe 2 is placed in the ground 10, and further, the internal space of the leading pipe 6 and the internal space of the succeeding pipe 7 are communicated with each other. The subsequent pipe 7 is sequentially added to the head pipe 6 in the rear and the hollows 101; 101 and the subsequent hollow tubes 101; 101 are connected to the rear of the hollow tubes 101; 101 so that the internal spaces of the subsequent hollow tubes 101; 101 communicate with each other. Similarly to the above, by installing in the underground 10 and constructing the second support 11B, a pair of hollow tubes 101; 101 and a pair are provided between the first support 11A and the second support 11B. Of the tube main body 2A of the other pipe 2 of the other side 2a constructed of the outer side surface 2a of the pipe main body 2A of one of the pipes 2 constructed with the long members 121; An underground region 150 having a high sealing property surrounded by the outer surface 2b is formed.
Similarly, as shown in FIG. 2C, the next pipe 2 (the leading pipe 6 and the leading pipe 6 and the plurality of succeeding pipes 7) is arranged next to the pipe 2 (the leading pipe 6 and the plurality of succeeding pipes 7) that form the second support 11B. By installing a plurality of succeeding pipes 7) in the underground 10 and constructing a third support work 11C, a hollow pipe 101; 101 is provided between the second support work 11B and the third support work 11C. And a pair of long members 121; 121 and the outer surface 2a of the pipe main body 2A of each of the pipes 2 constructing the second support 11B and the pipe main body of each of the other pipes 2 constructing the third support 11C. An underground region 150 surrounded by the outer surface 2b of 2A is formed.
In the first embodiment, the pipe 2 forming the support 11A first built in the ground is provided with the guide means 120 on one outer surface 2a of the pipe main body 2A. As the side surface 2b, a structure without the pair of hollow tubes 101; 101 was used (see FIGS. 1 to 3).
In the first embodiment, by providing the pair of hollow tubes 101; 101 and the guide means 120, each hollow 10 is provided between one support work 11 and the other support work 11 adjacent to each other in the underground 10. A highly sealed underground region 150 is formed in which the outer surface 106; 106 of the tube 101; 101 and one outer surface 2a of the tube body 2A of the tube 2 of the support 11 are in contact with or close to each other. 101 and the injection 105 injected into the underground region 150 by injecting the injection material 200 (see FIG. 11) into the underground region 150 through the injection port 105 with a check valve provided in the hollow tube 101. The possibility that the material 200 flows out of the underground region 150 is reduced. Therefore, the water stop treatment for forming a water stop treatment portion having a high water stop performance between the one support work 11 and the other support work 11 that are adjacent to each other in the underground 10 can be ensured and injected. The injection amount of the material 200 can be reduced, and the construction cost can be reduced.

An example of the pipe installation device 1 having the swingable excavating body 46 will be described.
As shown in FIG. 6, the pipe installation device 1 includes a pipe 2, an excavation device 3, and a control device 65. In the following, the upper side in FIG. 6 is defined as the head or front side of the tube 2 or the tube installation device 1, the lower side in FIG. 6 is defined as the rear side of the tube 2 or the tube installation device 1, and the left and right sides in FIG. The left and right sides of the tube 2 and the tube installation device 1 are defined, and the upper and lower sides in the direction orthogonal to the paper surface of FIG. 6 are defined as the upper and lower sides of the tube 2 and the tube installation device 1.

As shown in FIG. 6, the excavation apparatus 3 includes an excavation machine 26, an excavation machine swing drive apparatus 25, a propulsion apparatus 70, a water supply apparatus 75, and a mud discharge apparatus 76.
The excavating machine swing drive device 25 includes a swing substrate 30, a guide member 31 of the swing substrate 30, and a swing substrate driving means 32.

In the pipe installation device 1, the guide member 31 is installed on the inner side of the front pipe 6 on the front opening 6t side so that the center line of the cylinder of the cylindrical guide member 31 coincides with the center line of the pipe of the front pipe 6. The other pair of wall surfaces (where the rocking substrate 30 is opposed to the front pipe 6 in parallel with each other) and the water tightness between the outer peripheral surface 33 of the cylinder of the guide member 31 and the inner peripheral surface 6x of the front pipe 6 is maintained. For example, the guide member 31 is attached to the guide member 31 so as to be able to swing back and forth around the center between the left and right inner wall surfaces 6a; The watertightness between the inner peripheral surface 35 and the inner peripheral surface 35 is maintained. The rotary excavation body 46 of the excavating machine 26 having a plurality of excavation bits (excavation blades) 52 is positioned in front of the top opening 6t of the top pipe 6, and the column 42 that supports the rotary excavation body 46 is a rocking substrate. 30. When the ground excavation 99 in front of the top pipe 6 is excavated by the rotary excavator 46, the rocking substrate driving means 32 has a pair of side walls 30a; Is pressed and pulled back and moved back and forth, so that the rotation center line L of the rotary excavator 46 has a plane perpendicular to the propulsion direction of the leading pipe 6 and one pair of wall surfaces of the leading pipe 6 facing each other in parallel (for example, A first state parallel to the upper and lower inner wall surfaces 6c; 6d) of the top tube 6, and a direction parallel to the one pair of wall surfaces of the top tube 6 facing each other in parallel, and the propulsion direction of the top tube 6 Intersects an orthogonal plane in a state other than orthogonal It is set to the second state.
That is, the pipe installation device 1 includes the excavating machine rocking drive device 25 for rocking the rotary excavator 46 in the left-right direction of the top pipe 6 in front of the top pipe 6. When excavating 99 with the rotary excavator 46, the swing excavator 46 can be swung left and right by driving the swing substrate 30 by the swing substrate driving means 32, and the rotary excavator 46 can be swung horizontally. Compared with the case where it does not move, the lateral width that can be excavated can be increased. That is, prior to the advancement of the leading pipe 6, the left and right widths wider than the lateral width of the leading pipe 6 (the spacing between the pipes in the direction perpendicular to the other pair of wall surfaces of the leading pipe 6) in front of the leading pipe 6 Since the natural mountain 99 can be excavated at the width interval and the front pipe 6 can be dug in the left-right width direction in front of the top pipe 6, the top opening 6t of the top pipe 6 is grounded when the top pipe 6 is propelled. The possibility of colliding with the hard layer of the mountain 99 is reduced, and the leading pipe 6 can be smoothly promoted.

The leading opening edge 6z of the leading pipe 6 is formed in a tapered inclined surface so that it can easily bite into the natural ground 99.
The guide member 31 is formed of a cylinder having a quadrangular cross section, and is installed on the inner side of the leading end side of the leading tube 6 so that the center line of the guiding member 31 and the center line of the leading tube 6 are the same. The When the guide member 31 cuts the top tube 6 along a plane in which the outer peripheral shape of the cross section when the guide member 31 is cut along a plane orthogonal to the center line of the cylindrical body of the guide member 31 is perpendicular to the center line of the top tube 6 The outer peripheral dimension of the cross section of the swing guide member 31 is formed to be approximately the same as the inner peripheral dimension of the cross section of the top tube 6.
A watertight performance maintaining member 34 such as rubber packing is provided on the outer peripheral surface 33 of the guide member 31 so as to go around the outer peripheral surface 33. With the circumferential surface 6x facing each other with a slight gap of about several mm (for example, 5 mm), the watertight performance maintaining member 34 and the inner circumferential surface 6x of the top tube 6 are in contact with each other, and the guide member 31 The guide member 31 is installed inside the top opening 6t side of the top tube 6 so that the water tightness between the outer peripheral surface 33 of the cylinder and the inner peripheral surface 6x of the top tube 6 is maintained.
The left and right side wall surfaces 35a; 35b of the inner peripheral surface 35 of the guide member 31 are formed in curved surfaces in which the front and rear intermediate portions are curved in a concave shape with a constant curvature along the front-rear direction of the leading pipe 6.

The swing substrate 30 is formed by a rectangular flat plate whose outer peripheral shape matches the inner peripheral shape of the guide member 31. The flat plate forming the oscillating substrate 30 has a thickness along the front-rear direction, and the left and right side walls 30a; 30b of the flat plate face the curved surfaces of the left and right side wall surfaces 35a; 35b of the guide member 31 in parallel. The left and right side wall surfaces 35a; 35b are formed on curved surfaces having the same curvature as the curved surfaces. For example, cylindrical protrusions 37 and 37 (see FIGS. 7 and 9) are provided at the center position between the left and right of the upper and lower end surfaces of the flat plate forming the oscillating substrate 30. The projections 37; 37 are fitted into circular holes 38; 38 formed on the upper and lower inner surfaces of the cylinder of the guide member 31, so that the projections 37; 37 function as a rotation center axis of the swing substrate 30. The left and right sides of the swing substrate 30 are configured to be swingable in the front-rear direction about the rotation center axis.
A watertight performance maintaining member 12 such as rubber packing is provided on the outer peripheral surface 39 of the flat plate of the rocking substrate 30 so as to go around the outer peripheral surface 39, and the inner peripheral surface of the flat plate outer peripheral surface 39 of the rocking substrate 30 and the guide member 31. The surface 35 is opposed to the surface 35 with a slight gap of about several mm (for example, 5 mm), and the watertight performance maintaining member 12 and the inner peripheral surface 35 of the guide member 31 are in contact with each other, whereby the oscillating substrate 30. The watertightness between the outer peripheral surface 39 of the flat plate and the inner peripheral surface 35 of the cylindrical body of the guide member 31 is maintained. The watertight performance maintaining member 12 is provided in a groove 39h formed in the outer peripheral surface 39 so as to go around the outer peripheral surface 39 of the flat plate of the oscillating substrate 30 so as to protrude from the outer peripheral surface 39. It can be stably installed on the outer peripheral surface 39 of the flat plate of the oscillating substrate 30 so that the watertight performance can be sufficiently exhibited. The watertight performance maintaining member 12 is preferably provided on both the front and rear sides of the outer peripheral surface 39 of the flat plate of the swing substrate 30.

  As shown in FIG. 6; FIG. 8, the swinging substrate 30 has a column holding through hole 13, a mud pipe holding through hole 14, and a water supply pipe holding through hole 15 that penetrate the flat plate of the swinging substrate 30 back and forth. It is formed. As shown in FIG. 8, for example, the support holding through-hole 13 is formed so as to penetrate the central portion of the swing substrate 30, and the sludge drain holding through-hole 14 is provided on the left and right sides of the lower portion of the swing substrate 30. Two are provided so as to penetrate. Two water supply pipe holding through holes 15 are provided so as to penetrate the left and right of the upper side of the swing substrate 30. The strut holding through-hole 13 is held in a fixed state in a state where the strut 42 of the support portion 40 of the excavating machine 26 penetrates. The mud pipe holding through holes 14; 14 are held in a fixed state with the tip of the mud pipe 76c penetrating therethrough. The water supply pipe holding through-holes 15; 15 are held in a fixed state in a state where the distal end portion of the water supply pipe 75c penetrates.

The swing substrate driving means 32 includes a swing substrate driving jack 16, a jack mounting table 17, and a jack reaction force receiving member 18.
The swing substrate driving jack 16 is constituted by, for example, a hydraulic jack.
Two oscillating substrate driving jacks 16 are provided, and one oscillating substrate driving jack 16 is disposed on each of the left and right sides of the oscillating substrate 30 at the rear.
In the left swing board driving jack 16A, the cylinder 16a is mounted on the jack mounting table 17 and fixed to the jack mounting table 17, and the rear end surface of the cylinder 16a is located on the left side of the front surface of the jack reaction force receiving member 18. A connecting means 22 such as a pin joint between the tip of the piston rod 16b and the rear surface 30x of the swinging substrate 30 so that the upper and lower central sides on the left end side of the rear surface 30x of the swinging substrate 30 are fixed and can be pulled back. Connected by.
In the right swing board driving jack 16B, the cylinder 16a is mounted on the jack mounting table 17 and fixed to the jack mounting table 17, and the rear end surface of the cylinder 16a is on the right side of the front surface of the jack reaction force receiving member 18. A connecting means 22 such as a pin joint between the tip end of the piston rod 16b and the rear surface 30x of the oscillating substrate 30 so that the upper and lower central sides on the right end side of the rear surface 30x of the oscillating substrate 30 can be pressed and pulled back. Connected by.

The excavating machine 26 includes a support unit 40 and a rotating unit 41.
The support portion 40 is formed by a T-shaped hollow column in which one column 42 and two branch columns 43 are combined. The two branch columns 43 extend in a direction away from each other on a straight line perpendicular to the extending direction of the columns 42 from the distal end portion of the column 42.
The rotating unit 41 includes a rotating mechanism unit 45 and a rotating excavator 46. The rotation mechanism unit 45 is configured by a motor 47, for example. Motor mounts 44 are provided at both ends of the branch column 43, and a casing 48 of a motor 47 is fixed to each motor mount 44; 44. The rotating shafts 49; 49 of the two motors 47; 47 extend in directions away from each other on a straight line perpendicular to the extending direction of the support column (that is, on the center line of the branch support column 43) from the tip end of the support column 42.
The rotary excavator 46 includes, for example, a circular box-shaped rotary body 50 having one end opening and the other end closed, which includes a cylindrical portion 50a and a bottom plate 50b that closes the other end of the cylindrical portion 50a, and an outer periphery of the cylindrical portion 50a of the rotary body 50. A plurality of excavation bits 52 provided on the surface 51 are provided.

As the motor 47, for example, a motor that operates by fluid pressure or a motor that operates by electricity is used. For example, when a hydraulic motor (hereinafter referred to as a hydraulic motor 47) is used, a pressure hose 56 in which a hydraulic source 55 as the drive source 27 and the casing 48 of the hydraulic motor 47 form a pressure oil supply path 56a and an oil return path 56b. Connected with That is, the pressure hose 56 is connected to the casing 48 of the hydraulic motor 47 through the T-shaped hollow path of the support portion 40. The hydraulic motor 47 is configured such that the rotating shaft 49 is rotated by pressure oil supplied into the casing 48 via the pressure hose 56.
For example, the rotation rotated by the hydraulic motor 47 and the inner surface 53 of the bottom plate 50b of the rotating body 50 so that the circle center of the inner surface 53 of the bottom plate 50b of the rotating body 50 of the rotary excavator 46 and the rotation center of the rotating shaft 49 coincide. A connecting plate 54 provided at the tip of the shaft 49 is connected by a connecting tool 57 such as a screw. That is, the two rotary excavating bodies 46; 46 are positioned in front of the leading opening 6t of the leading pipe 6, and the two rotary excavating bodies 46; 46 are one rotation center line L common to the two rotating shafts 49; 49. Is configured to rotate around the center of rotation. Such a configuration including two rotary excavating bodies 46; 46 is called a twin header.
In the first embodiment, as described above, the rotation center line L of the two rotary excavating bodies 46; 46 is parallel to the plane orthogonal to the propulsion direction of the leading pipe 6 and parallel to the upper and lower inner wall surfaces of the leading pipe 6. When the natural ground 99 is excavated in the first state, the excavation width of the rotary excavation body 46 in the plane orthogonal to the propulsion direction can be increased, and further, the excavation can be performed in a quadrangular cross section. The pipe 2 can be easily installed in the underground 10.
Further, in the first embodiment, the excavating machine swing driving device 25 is operated, and as shown in FIG. 10, the rotation center line L of the two rotary excavating bodies 46; 46 is a surface orthogonal to the propulsion direction of the top pipe 6. When the natural ground 99 is excavated in a second state that intersects and is parallel to the upper and lower inner wall surfaces of the top pipe 6, the natural ground 99 has a width interval that is wider than the left and right width intervals of the top pipe 6 in front of the top pipe 6. Therefore, when the leading pipe 6 is propelled, the possibility that the leading opening 6t of the leading pipe 6 collides with the hard layer of the natural ground 99 is reduced, and the leading pipe 6 can be smoothly propelled. .

The propulsion device 70 includes a propulsion drive source 61, the above-described guide member 31, propulsion force transmission means 62 that transmits the propulsive force generated by the propulsion drive source 61 to the guide member 31, and the propulsive force transmitted to the guide member 31 at the head. And a propulsive force receiving portion 63 that transmits to the tube 6.
The propulsive force receiving portion 63 is in contact with the front end surface 31a of the cylinder of the guide member 31 installed on the inner side of the front opening 6t of the front tube 6 to restrict the forward movement of the guide member 31 and to the guide member 31. In order to be able to transmit the propulsive force transmitted to the leading pipe 6, it is fixed to the inner surface of the leading pipe 6 on the leading opening 6t side by fixing means such as welding, bolts and nuts.
The propulsive force transmission means 62 includes a propulsive force transmission component 64, a propulsive force transmission rod 71, and a propulsion force transmitting member 72.
The propulsive force transmission component 64 is formed by combining, for example, H-section steel. For example, the front left upper / lower extension column 64a provided to extend up and down connected to the left end rear end surface of the guide member 31 and the right end rear end surface of the guide member 31 to extend vertically. The front left upper / lower extension post 64b, the rear left upper extension post 64c connected to the left end of the jack reaction force receiving member 18 and extended vertically, and the right end of the jack reaction receiving member 18 The rear right and left upper and lower extension pillars 64d connected to the upper and lower parts and the rear right and left upper and lower extension pillars 64a extending in the front and rear direction are connected to the rear and rear left and right upper and lower extension pillars. 64c is connected to the left connecting part 64e, and the right connecting part 64f is extended in the front-rear direction and the front end is connected to the front right upper and lower extension pillar part 64b and the rear end is connected to the rear right upper and lower extension pillar part 64d. With.

The propulsive force transmitting rod-like body 71 is a rod-shaped member whose length from one end to the other end is longer than the shortest distance between the rear end surface 64x of the propulsive force transmitting component 64 and the rear end surface 102e of the leading pipe 6. Is the body. As the propulsive force transmission rod-shaped body 71, for example, H-shaped steel is used.
The propulsive force transmission rod-like body 71 is installed such that the center line faces the same direction as the center line of the leading pipe 6. The front end surface of the left propulsive force transmitting rod-like body 71A and the upper and lower center positions on the rear surface of the rear left upper / lower extension column portion 64c are connected, and the front end surface of the right propulsive force transmission rod-like body 71B and the rear right upper / lower extension column portion 64d. The upper and lower center positions on the rear surface are connected.

  The propulsion drive source 61 is constituted by, for example, a hydraulic jack 61A. A pressing plate 61b is provided at the tip of the piston rod 61a of the hydraulic jack 61A. The cylinder 61c of the hydraulic jack 61 is fixed to a jack reaction force receiving member (not shown).

And the abutting material 72 is installed so as to straddle between the other ends of the left and right propulsive force transmitting rod-like bodies 71A; 71B projecting rearward from the rear end face 102e of the leading pipe 6, and the left and right propelling force transmitting rod-like bodies 71A; 71B Are connected to the other end by a bolt or a vise device not shown in the figure, and the central portion between the other ends of the left and right propulsive force transmitting rods 71A; 71B in the abutting member 72 is pressed by the pressing plate 61b of the hydraulic jack 61A. Thus, the pressing force by the hydraulic jack 61A is transmitted to the leading pipe 6 and the rotary excavation body 46; 46 via the propulsive force transmitting rod 71, the propulsive force transmitting component 64, the guide member 31, and the propulsive force receiving portion 63. Therefore, the leading pipe 6 propels forward and the rotary excavator 46; 46 propels forward.
In this case, the right propulsive force transmitting rod-like body 71B connected to the upper and lower central positions on the rear surface of the rear right upper and lower extension post 64d and the left side connected to the upper and lower central positions on the rear surface of the rear left upper and lower extension post 64c. The propulsive force transmitted to the propulsive force transmitting component 64 via the propulsive force transmitting rod 71A is transmitted to the four corners of the rear end surface 31x of the guide member 31 (see FIG. 6). Thus, the propulsive force can be transmitted evenly, the posture of the guide member 31 can be maintained stably, and the rocking motion of the excavating machine rocking drive device 25 can be stabilized.

The water supply device 75 includes a water storage tank 75a, a pump 75b for water supply, a water supply pipe 75c, and a water supply pipe holding through hole 15 that holds a front end opening of the water supply pipe 75c.
The water supply pipe 75c includes a front part 75x that is held in the water supply pipe holding through-hole 15 and a main part 75y that is connected to the rear end of the front part 75x and extends outward from the rear end opening of the leading pipe 6. . For example, the front portion 75x is formed of a steel pipe, and the main portion 75y is formed of a hard vinyl bellows tube. The front end opening side of the front portion 75x is fixed to the water supply pipe holding through hole 15 of the swing substrate 30 so that water can be discharged to the natural ground 99 in front of the front surface 30f of the swing substrate 30 and the front portion 75x. The rear end opening side is provided so as to protrude rearward from the rear surface 30x of the swing substrate 30. The rear end opening of the front portion 75x and the front end opening of the main portion 75y are connected so as to communicate with each other, and the rear end opening of the main portion 75y and the discharge port of the water supply pump 75b are connected so as to communicate with each other. And the suction port of the pump 75b for water supply and the water storage tank 75a are connected so that communication is possible by the connecting pipe outside a figure. Two systems of water supply devices 75 are provided on the left and right sides inside the upper portion of the top pipe 6. Note that the front end opening of the front portion 75x is positioned on the inner surface side of the head tube 6 so that the water supply tube 75c does not contact the left and right inner surfaces of the head tube 6 when the rocking substrate 30 swings. The rear end opening is provided so as to be located on the center side of the leading pipe 6. In other words, the front portion 75x is provided such that the center line of the tube extends while being inclined from the inner side surface 6a; 6b side of the leading tube 6 to the central side of the leading tube 6.

The mud drain device 76 includes a mud tank 76a, a pump 76b for mud, a mud pipe 76c, and a mud pipe holding through hole 14 that holds the front end opening of the mud pipe 76c.
The drainage pipe 76c includes a front part 76x held in the drainage pipe holding through hole 14 and a main part 76y connected to the rear end of the front part 76x and extending outward from the rear end opening of the leading pipe 6. . For example, the front portion 76x is formed of a steel pipe, and the main portion 76y is formed of a hard vinyl bellows tube. The front end opening side of the front portion 76x is fixed to the drainage pipe holding through hole 14 of the swinging substrate 30 so that the excavated soil gathered in front of the front surface 30f of the swinging substrate 30 can be taken in through the front end opening. The rear end opening side of the front portion 76x is provided so as to protrude rearward from the rear surface 30x of the swing substrate 30. The rear end opening of the front portion 76x and the front end opening of the main portion 76y are connected so as to communicate with each other, and the rear end opening of the main portion 76y and the suction port of the mud pump 76b are connected so as to communicate with each other. And the discharge port of the pump 76b for mud and the mud tank 76a are connected so that communication is possible by a connecting pipe outside the figure. Two systems of the mud discharge device 76 are provided on the left and right sides inside the lower portion of the top pipe 6. It should be noted that the front end opening of the front portion 76x is positioned on the inner surface side of the front pipe 6 so that the sludge pipe 76c does not contact the left and right inner surfaces of the front pipe 6 when the swing substrate 30 swings. The rear end opening is provided so as to be located on the center side of the leading pipe 6. In other words, the front portion 76x is provided so that the center line of the tube extends from the inner side surface 6a; 6b side of the leading tube 6 to the central side of the leading tube 6 while being inclined.

In addition, the water storage tank 75a and the waste mud tank 76a are comprised by the collection tank 75X which the water storage tank 75a and the waste mud tank 76a integrated, for example. That is, the partition 75w is provided inside the collective tank 75X to divide the collective tank 75X into two regions, one region is used as the water storage tank 75a, and the other region is used as the mud tank 76a.
That is, when a certain amount of water is initially filled in the collecting tank 75X, and the water pump 75b is driven to pump water forward of the swing substrate 30, the water pumped forward of the swing substrate 30 is supplied. And the earth and sand excavated by the rotary excavator 46; 46 are mixed to form muddy water. Then, the mud water in front of the swing substrate 30 is discharged to the mud tank 76a by driving the mud pump 76b. Mud in the mud discharged to the waste mud tank 76a settles on the bottom of the waste mud tank 76a, and the mud that has entered the water storage tank 75a beyond the partition 75w is again fed by the pump 75b for water supply by the swing substrate 30. It is pumped forward. That is, since the muddy water can be circulated and supplied to the front of the rocking substrate 30, the amount of water used can be reduced. Further, since muddy water having a specific gravity greater than that of water can be supplied to the front of the rocking substrate 30, it can resist the pressure of the ground and groundwater, and the pressure of the ground and groundwater and the pressure supplied to the front of the rocking substrate 30 are equal. Therefore, the influence on the underground 10 such as land subsidence can be reduced. Moreover, since the front of the rocking substrate 30 becomes muddy water, the mud can be drained smoothly and excavation is facilitated.
The muddy water may be filled in the collecting tank 75X from the beginning, and the muddy water may be circulated between the front of the oscillating substrate 30 and the collecting tank 75X by driving the water supply pump 75b.

  According to the pipe installation device 1 having the swingable rotary excavating body 46 described above, the excavating machine swinging drive device 25 is provided, so that the rotation center line L of the rotary excavating body 46 is perpendicular to the propulsion direction. Since the rotary excavator 46 can be swung to the left and right by tilting with respect to the plane perpendicular to the propulsion direction, the horizontal excavation width by the rotary excavator 46 is increased. Since the amount of surplus can be increased and the hard layer ahead of the leading pipe 6 can be excavated, the leading pipe 6 can be smoothly propelled in the underground 10 even when the natural ground 99 is hard ground.

Next, the installation method of the pipe | tube 2 to the underground 10 by the pipe installation apparatus 1 is demonstrated.
An assembly in which the excavating machine 26, the excavating machine swing drive device 25, the propulsion device 70 excluding the pad 72, the water supply pipe 75c, and the sludge pipe 76c is assembled from the rotary excavating body 46 side. The lead pipe 6 is inserted into the lead pipe 6 through the rear end opening, and the front end face 31a of the guide member 31 is brought into contact with the thrust receiving portion 63 fixed to the inside of the lead pipe. And the abutting material 72 is installed so as to straddle between the other ends of the left and right propulsive force transmission rod-like bodies 71A; 71A; It connects with the other end of 71B with a volt | bolt outside a figure, a vise, etc. Then, the water supply pump 75b is driven to supply muddy water to the front of the oscillating substrate 30, and the muddy water is circulated between the front of the oscillating substrate 30 and the inside of the collecting tank 75X. The propulsive force is transmitted by transmitting the propulsive force by operating the propulsion drive source 61 and applying the propulsive force to the abutting member 72 while supplying the hydraulic oil from the hydraulic source 55 to the hydraulic motor 47 and rotating the rotary excavator 46. It is transmitted to the leading pipe 6 and the rotary excavating body 46; 46 through the rod-like body 71, the propulsive force transmitting component 64, the guide member 31, and the propelling force receiving part 63. 46 propels forward. At this time, the rotary excavator 46 swings in the left-right direction of the top pipe 6 by operating the swing board drive jack 16 to swing the left and right walls 30a; 30b of the swing board 30 back and forth. Rocks and excavates natural ground 99. As a result, the ground 99 is excavated with a width between the left and right widths wider than the left and right width of the top pipe 6 in front of the top pipe 6, so that when the top pipe 6 is propelled, the tip of the top pipe 6 is hard ground. The possibility of colliding with the mountain 99 is reduced, and the leading pipe 6 can be smoothly promoted.
After the leading pipe 6 is installed in the ground 10 leaving the rear end face 102e of the leading pipe 6, the succeeding pipe 7 is connected to the rear end face 102e of the leading pipe 6 by welding or a fixture such as a bolt, By connecting the other end of the leading thrust transmission rod 71 and one end of the trailing thrust transmission rod 71 by bolts or welding, the following thrust is placed behind the leading thrust transmission rod 71. In addition to adding the transmission rod-like body 71, an extension pressure hose (not shown) is added to the other end of the pressure hose 56, and an extension water supply pipe (not shown) is added to the other end of the water supply pipe 75c. An extended sludge pipe (not shown) is added to the other end. Then, the abutting member 72 is installed so as to straddle between the other ends of the left and right propulsive force transmitting rod-like bodies 71A; 71B projecting rearward from the rear end edge of the succeeding pipe 7, and the abutting member 72 is disposed on the piston of the hydraulic jack 61A. By rotating and driving the rotary excavator 46; 46 while being pressed by the rod 61a, the leading pipe 6 is propelled while the rotary excavator 46 excavates, and the subsequent pipe 7 is installed in the ground.
Thereafter, similarly, the support work 11 can be constructed by sequentially connecting the subsequent succeeding pipe 7 to the rear end edge of the preceding succeeding pipe 7 and installing it in the ground 10.

After the support work 11 is constructed, if the excavating machine 26 and the like are pulled back and collected into the cavity on the starting side that is the starting point of excavation, the propulsive force transmission rod-shaped body 71 is added, so that the excavating machine 26 And the like, the propulsive force transmission rod-shaped body 71 is pulled back into the cavity by one length from the rearmost propulsive force transmission rod-shaped body 71 side, and the propulsive force transmission rod-shaped in order from the last tail side to the top By removing the body 71, the excavating machine 26 and the like can be easily collected. In this case, the hydraulic jack 61A, which is an example of the propulsion device, needs to be installed only in the cavity that is the starting point of excavation, so that the device cost can be reduced.
Note that the excavating machine 26 and the like may be pushed into the cavity on the reaching side and recovered.
For example, after the top pipe 6 is pushed out into the cavity on the reaching side and the propulsion receiving part 63 is removed, the excavating machine 26 and the like are pushed into the cavity on the reaching side and collected. In this case, the operation of pushing the excavating machine 26 and the like into the cavity on the reaching side is easier than the operation of pulling the excavating machine 26 and the like into the cavity that is the starting point of excavation. It becomes.
When the supporting work 11 is constructed so as to start from one cavity portion formed in the ground 10 and return to the cavity portion, the excavating machine 26 or the like is excavated if the excavating machine 26 reaches the arrival port of one cavity portion. If the machine 26 and the like are recovered by being pushed out from the arrival port into the cavity, the excavating machine 26 and the like can be easily recovered, and the hydraulic jack 61A only needs to be installed in the one cavity, so that the apparatus cost is reduced. Can also be reduced.
In addition, the support 11 with which the intensity | strength of the pipe | tube 2 was raised is constructed | assembled by filling the concrete 300 in the pipe | tube 2 of the support work 11 as needed, or arrange | positioning a reinforcing bar and filling the concrete 300 ( (See FIG. 11).

As shown in FIG. 1, the pipes 2 of the support work 11 (the leading pipe 6 and the plurality of succeeding pipes 7) constructed by the leading pipe 6 and the plurality of succeeding pipes 7 previously installed in the ground 10 are arranged side by side. As described above, when the support pipe 11 is constructed by installing the next pipe 2 (the leading pipe 6 and the plurality of succeeding pipes 7) in the underground 10, the pipe 2 of the support 11 constructed in the underground 10 first. Between the surface 123 and the surface 123 on the other long side of each of the long members 121; 121 forming the guide means 120 provided on one outer surface 2a of the tube main body 2A, the ground Each hollow tube 101; 101 is inserted as a projection 100 provided on the other outer surface 2b of the next tube 2 (the leading tube 6 and the plurality of succeeding tubes 7) to be installed in 10 and One of the outer surface 106; 106 of the empty pipe 101; 101 and the pipe body 2A of the pipe 2 of the first support work 11 While contacting or close to the side surface 2a, to build 支保 Engineering 11 established the following tube 2 into the ground 10. As a result, the pipe body 2A of the outer surface 106; 106 of each hollow pipe 101; 101 and the pipe 2 of the support work 11 is disposed between one support work 11 and the other support work 11 that are adjacent to each other in the ground 10. An underground region 150 having a high sealing property in contact with or close to one outer surface 2a is formed, and the inside of the hollow tube 101 and the inlet 105 with a check valve provided in the hollow tube 101 are formed. By injecting the injection material 200 (see FIG. 11) into the underground region 150, a water-stopping treatment section with high water-stopping performance is formed between one support work 11 and the other support work 11 that are adjacent to each other. The
In this case, since the underground region 150 has a high hermeticity and has a large number of excavated voids, the filler 200 is filled in the voids, and the injected material 200 injected into the underground region 150 is filled with the voids. Since the possibility of flowing out of the underground region 150 is reduced, the injection amount of the injection material 200 can be reduced, and the construction cost can be reduced.
In the injection process, for example, the space inside the hollow tube 101 near the injection port communicating with the injection port 105 with a check valve is sealed using an injection device called a packer (not shown), and the injection material 200 is sealed in the sealed space. Can be supplied.

  In the case of a propulsion method in which the pipe 2 is sequentially added backward while excavating and propelling the underground 10 with the excavating machine 26 as in the present invention, the hollow pipe 101; Providing protrusions such as the guide means 120 is not preferable because it causes resistance during propulsion, but in the present invention, the outer surface 2a of the pipe body 2A of the pipe 2 installed in the ground by the pipe installation device 1 is not preferable. The hollow tube 101 provided in 2b; 101 and the underground 10 in the forward direction of the guide means 120 are dug by the rotating excavator 46, so that the outer surface 2a of the tube body 2A of the tube 2 ; Even if the hollow tube 101; 101 and the guide means 120 are provided in 2b, the resistance during propulsion is almost eliminated.

According to the first embodiment, in the method of installing the pipe 2 in the underground 10 using the pipe installation device 1 having the swingable excavating body 46, the pipe of the pipe 2 previously installed in the underground 10. The other outer surface 2b of the tube body 2A of the next tube 2 installed in the ground 10 so as to be arranged next to one outer surface 2a of the pair of outer surfaces 2a; A pair of hollow tubes 101; 101 are provided on the outer surface 2b) that are located next to one outer surface 2a that is first installed in the ground 10 and face each other. By placing the next pipe 2 in the underground 10 while making the outer side surface 106; 106 contact or approach one outer surface 2a of the pipe body 2A of the pipe 2 previously installed in the underground 10, the spacing is increased. The pipe body 2A of one pipe 2 installed in the underground 10 so as to be adjacent to each other with a distance Between the side surface 2a and the outer surface 2b of the tube body 2A of the other tube 2, a pair of hollow tubes 101; 101, a pair of long members 121; 121, and an outer surface 2a of the tube body 2A of one tube 2 And the outer surface 2b of the tube main body 2A of the other tube 2 can be formed, and the underground region 150 having high sealing performance can be formed. In the underground region 150, the hollow space of the hollow tube 101 and a check valve attached Since the injection material 200 is filled from the inside of the hollow tube 101 through the inlet 105 to form the water stop treatment portion, the injection material 200 injected into the underground region 150 flows out of the underground region 150. Between the outer surface 2a of the tube body 2A of one tube 2 and the outer surface 2b of the tube body 2A of the other tube 2 that are installed in the ground 10 so as to be adjacent to each other with a gap therebetween. Of the injection material 200 necessary for the water stop treatment and the water stop treatment during And it can reduce the Iriryou, will be able to reduce the construction cost.
Moreover, it installs in the underground 10 so that it may line with the pipe | tube 2 previously installed in the underground 10 in one outer side surface 2a of the pipe | tube main body 2A of the pipe 2 previously installed in the underground 10. As a guide means 120 for guiding a pair of hollow tubes 101; 101 provided on the other outer surface 2a of the tube body 2A of the tube 2 to guide the traveling direction of the next tube 2 in the ground 10. Since the pair of long members 121; 121 having an L-shaped cross section are provided, the propulsion direction of the pipe 2 to be installed in the underground 10 in the underground 10 is a pair of hollow tubes 101; 101 and a pair of elongated It is accurately guided by the members 121; 121, and the adjacent support members 11 are not displaced from each other.
Moreover, since the pair of long members 121; 121 having an L-shaped cross section as the guide means 120 is provided, the propulsion direction in the underground 10 of the pipe 2 to be installed in the underground 10 can be accurately guided, A pair of hollow tubes 101; 101, a pair of long members 121; 121, and an outer surface 2a of the tube body 2A of one tube 2 and an outer surface 2b of the tube body 2A of the other tube 2 are more sealed. Can be formed.

In the case where there is no reaching-side cavity that allows the pipe 2 to reach, after the support 11 is constructed, the excavating machine 26 and the like are withdrawn into the starting-side cavity that is the starting point for excavation and collected. In order to prevent groundwater from flowing into the pipe 2 of the supporting work 11 and causing ground subsidence, it is necessary to bury the concrete 300 in the pipe 2 when the excavating machine 26 is pulled back and collected. In this case, since the inside of the pipe body 2A is filled with the concrete 300, it becomes impossible to inject the injection material into the underground region 150 between the one support work 11 and the other support work 11 from the inside of the pipe main body 2A.
On the other hand, when the hollow tube 101 that can be used as an injection tube is used as in the first embodiment, even if the concrete 300 is buried in the tube main body 2A as described above, the hollow tube 101 is used. The injection material 200 can be injected into the underground region 150 using the tube 101 as an injection tube.
Therefore, as described above, when there is no cavity on the side where the pipe 2 reaches, when the excavating machine 26 and the like are pulled back and collected, it is necessary to bury the concrete 300 in the pipe body 2A. It is effective to use a tube 2 having such a hollow tube 101.

Embodiment 2
The tube of the present invention may be a tube without the guide means 120.

Embodiment 3
The excavation radius by the excavation bit as an excavation blade provided so as to protrude from the outer peripheral surface 51 of the rotating body 50 is based on the dimension between a pair of inner wall surfaces of the leading pipe 6 (for example, between the upper and lower inner wall surfaces of the leading pipe 6). And a pair of wall surfaces of the front pipe 6 in front of the front pipe 6 using a rotary excavation body (not shown) configured to be able to pass through the inner space of the front pipe 6 at the time of recovery. A pipe configured to be able to excavate the underground 10 at a width interval wider than the width interval of the leading pipe 6 (for example, the vertical width interval of the leading pipe 6) that is orthogonal to the upper and lower inner wall surfaces 6c; 6d. An installation device may be used.
If the pipe installation device provided with the rotary excavator of the fifth embodiment and the excavating machine swing drive device 25 of the first embodiment is used, the underground 10 in front of the top pipe 6 is underground in the top, bottom, left and right sides. Since 10 additional moats are possible, it is possible to prevent a situation in which the leading opening edge of the leading pipe 6 collides with the hard ground and the leading pipe 6 cannot be pushed, and even if the ground is a hard ground, The pipe 2 can be promoted more smoothly in the underground 10.

  It should be noted that the pipe installation device as disclosed in Patent Document 1, that is, a rotary excavator that rotates around the rotation center line orthogonal to the propulsion direction of the pipe is provided inside the top side of the pipe, and the pipe Even when a pipe is installed in the ground using a pipe installation device having a configuration in which a blade pipe larger than the outer diameter of the pipe is provided at the tip of the pipe, overcutting is performed by the blade pipe. Therefore, also in this case, if the next pipe is installed in the ground so that it is next to the pipe installed in the ground first, the pipe and pipe installed in the ground first and A space is formed between the pipe bodies between the next pipe installed in the ground so as to be arranged next to the installed pipe. Therefore, when the pipe of the present invention is used, the pipe is installed in the ground so as to be adjacent to each other with a gap even when the pipe is installed in the ground using the pipe installation device having the configuration provided with the blade pipe. The injection material 200 can be injected into an underground region formed between the outer surface of the tube body of one tube and the outer surface of the tube body of the other tube.

In addition, the subsequent pipe is not connected to the rear end of the pipe to be put into the underground 10 first, and only the pipe to be put into the ground first from the hollow portion formed in the ground is installed in the underground 10 to the front. You may make it form the support work only by the pipe | tube put into the ground (namely, one pipe | tube). For example, a single pipe 2 may be used to form a pipe straddling one cavity and the other cavity.
Further, the cross-sectional shape referred to in the present invention is a quadrangular shape, including a shape in which square corners are chamfered.

  The cavity described in the present invention is formed by a cavity surrounded by a shield tunnel segment, a tunnel cavity surrounded by a mountain tunnel wall, or a space in a shaft. The underground space formed by the present invention includes the space forming the subway platform described above, the forward space and the return space on the tunnel road and railroad, the junction or branching portion on the tunnel road and railroad, the tunnel road and There are widened portions in the track, the above-described communication paths, and the like.

  In the above description, the tube 2 having a pair of hollow tubes 101; 101 on one outer surface 2b of the tube main body 2A has been described as an example. However, in the tube of the present invention, one hollow tube is a tube. The structure provided so that a pipe line might be extended in the one outer surface of a main body over the full length of the extension direction of a pipe main body may be sufficient. Even in this case, the injection material can be injected into the ground outside the tube using the hollow tube as the injection tube.

  Furthermore, in the above description, the tube main body 2A and the hollow tube 101 have been described as an example having a structure having a square cross section. However, in the pipe of the present invention, the tube main body and the hollow tube have a shape other than a square cross section. The pipe | tube comprised with the shape of this shape may be sufficient. That is, the pipe | tube of the structure provided with the hollow pipe other than cross-sectional square shape in the outer surface of the pipe | tube body other than square cross-section may be sufficient. For example, a tube having a configuration in which a hollow tube having a circular cross section is provided on the outer surface of a circular tube main body. Even in this case, the injection material can be injected into the ground outside the tube using the hollow tube as the injection tube.

  2 tube, 2A tube body, 2b The other outer surface (one outer surface) of the tube body, 10 underground, 101 hollow tube, 120 guide means.

Claims (5)

  A pipe installed in the ground, comprising a pipe main body and a hollow pipe provided on an outer surface of the pipe main body so that a pipe line extends along an extension direction of the pipe main body. Tube to do.   The tube main body is formed of a tube having a quadrangular cross section, and the hollow tube is provided on one outer surface of the tube main body so as to extend the entire length of the tube main body in the extending direction. Item 1. The tube according to Item 1.   The pipe according to claim 1 or 2, wherein the pair of hollow pipes are provided at a predetermined interval.   A tube having guide means on the outer surface opposite to the outer surface on which the hollow tube of the tube body is provided, and other tubes arranged side by side on the outer surface of the tube body of the tube installed in the ground Is installed in the ground, the hollow tube provided on the outer surface of the tube body of another tube is guided by the guide means provided on the outer surface of the tube body of the tube installed in the ground. The pipe according to any one of claims 1 to 3, wherein when the other pipe is installed in the ground, the traveling direction of the other pipe is guided.   5. The tube according to claim 4, wherein the guide means is provided so as to contact an outer surface of a hollow tube provided on an outer surface of a tube body of another tube.

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