JP2011111728A - Method of pipe installation and pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of pipe installation capable of specifying the extending direction of a pipe without including a recessed/projecting engagement part when the pipe is extended along the side of an installed pipe, and of reducing a cost for manufacturing the recessed/projecting engagement part by applying a force to the recessed/projecting engagement part in a specified direction when the pipe is extended even when the pipe includes the recessed/projecting engagement part. <P>SOLUTION: In this method of pipe installation, a pipe 1 is installed in the ground so as to be arranged in parallel to an installed pipe 50 by extending the pipe 1 in the extending direction of the installed pipe 50 along the outer surface of the installed pipe 50 which has already been installed in the ground. The pipe 1 used is such that all or a part of the one end opening edge surface 20 of the pipe 1 is formed to have a tilted surface 26 tilted from one end 1a of the pipe 1 toward the other end 1b thereof. The tilt start end of the tilted surface 26 of the pipe 1 is positioned on the outer surface side of the installed pipe 50, and the pipe 1 is extended in the extending direction of the installed pipe 50 along the outer surface of the installed pipe 50 to install the pipe 1 in the ground. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for installing a pipe in the ground so as to line up with a pipe already installed in the ground, and a pipe used in the method.

A method of constructing a support work by arranging pipes such as steel pipes in the ground is known (see, for example, Patent Documents 1 to 4).
As shown in FIG. 15, as the support work 11 constructed in the underground 10, a plurality of curves are formed so as to straddle between one tunnel cavity 100 formed in the underground 10 and the other tunnel cavity 100. The pipe 2 is constructed continuously (see FIG. 15A), or a plurality of curved pipes 2 are continued so as to start from the cavity 100 formed in the underground 10 and return to the cavity 100. (See FIG. 15B).
As shown in FIG. 16; FIG. 17, it is formed by a leading pipe 6 which is a curved pipe 2 positioned at the head and a succeeding pipe 7 which is a plurality of succeeding curved pipes 2 provided so as to follow the leading pipe 6. The support works 11 constructed by the continuous curved pipes 67 are provided adjacent to each other. That is, the support work 11 is constructed in the underground 10 by repeatedly moving the leading pipe 6 in the direction of arrow F and sequentially connecting the succeeding pipe 7 after the leading pipe 6.
Further, as shown in FIG. 18; FIG. 19, the pipe 2A (pipe whose central axis is a straight line) that extends straight is used to straddle between one tunnel cavity 100 and the other tunnel cavity 100. When a support work is constructed by continuously installing a plurality of pipes 2A (see FIG. 18), or a support work is constructed by installing the pipe 2A so as to extend in the tunnel extension direction at the tunnel excavation part. In some cases (see FIG. 19).
By the way, in order to form the next support work along the side of the support work formed by a plurality of pipes already installed in the ground (curved pipe 2 or pipe 2A) or an installed pipe composed of one pipe. When the pipe is installed, the pipe may be subjected to earth pressure and the traveling direction of the pipe may not be determined, and the pipe may travel away from the installed pipe and travel in the ground 10.
Therefore, when installing a pipe to form the next support work along the side of the support work already formed by the already installed pipe in the ground, it is recessedly engaged with the pipe that will be the installed pipe A pipe (or a concave engagement part) is provided on the pipe that is installed along the side of the installed pipe, and a pipe that becomes the installed pipe and the side of the installed pipe are provided. In order to prevent the pipe from moving away from the installed pipe and proceeding in the ground 10 by engaging with the pipe installed along the line (see, for example, Patent Documents 3 to 5).

Japanese Patent No. 4057439 JP 2008-50809 A JP 2002-47879 A JP 2005-248658 A JP-A-11-173066

However, in the above case, a special tube provided with a pair of concave and convex engaging portions must be used as the tube, which increases the cost of the tube and is uneconomical. In addition, when using a pipe having a pair of concave and convex engaging portions, when the pipe is advanced along the side of the installed pipe, the concave and convex engaging portion between the installed pipe and the pipe from various directions is used. Since the force is easily applied, the concave / convex engaging portion must be formed firmly so that the concave / convex engaging portion does not separate, and the manufacturing cost of the concave / convex engaging portion increases, which is uneconomical. It was.
The present invention has been made in view of the above problems, and when a tube is advanced along the side of an already-installed tube, the tube can be installed with a constant direction of travel without providing an uneven engagement portion. Provide methods and more. In addition, a pipe installation method or the like that can apply a force in a certain direction to the concave / convex engaging portion when the pipe progresses even when the concave / convex engaging portion is provided, and can reduce the manufacturing cost of the concave / convex engaging portion. provide.

In the pipe installation method according to the present invention, the pipe is grounded so as to line up with the installed pipe by advancing the pipe in the extending direction of the installed pipe along the outer surface of the installed pipe already installed in the ground. In the pipe installation method, the pipe is formed such that all or a part of the opening edge surface of the pipe is formed on an inclined surface inclined from one end of the pipe toward the other end of the pipe. Since the inclination start end side of the inclined surface is positioned on the outer surface side of the installed pipe and the pipe is advanced in the extension direction of the installed pipe along the outer surface of the installed pipe, it is installed in the ground. The inclined surface receives earth pressure when the pipe is advanced along the pipe, so that the direction of the pipe can be made constant without providing the uneven engagement portion between the installed pipe and the pipe, and the pipe is separated from the installed pipe. Can be prevented from traveling through the ground. In addition, even when the installed pipe and the pipe are provided with the concave and convex engaging portion, a force in a certain direction can be applied to the concave and convex engaging portion when the pipe advances, and the manufacturing cost of the concave and convex engaging portion can be reduced. .
In the pipe installation method according to the present invention, the pipe is grounded so as to line up with the installed pipe by advancing the pipe in the extending direction of the installed pipe along the outer surface of the installed pipe already installed in the ground. In the pipe installation method, the installed pipe and the pipe having a rectangular cross section are used, and the pipe has one end edge of the pipe facing from the one end of the pipe toward the other end of the pipe. An inclined surface is used, and the inclined surface is inclined from one end of one outer surface of the tube toward the other end of the tube and reaches the other outer surface facing the one outer surface of the tube in parallel. Installed pipe along the outer surface of the installed pipe by using one formed on the inclined surface, with one outer surface side of the pipe, which is the inclination start end side of the inclined surface of the pipe, positioned on the outer surface side of the installed pipe Since it is installed in the ground by proceeding in the extending direction, the cross section is rectangular along the side of the installed pipe with a rectangular cross section When the pipe is advanced, the inclined surface is subjected to earth pressure, so that the installed pipe and the pipe can be made constant in the direction of travel without having a concave-convex engaging part. You can prevent going inside. In addition, even when the installed pipe and the pipe are provided with the concave and convex engaging portion, a force in a certain direction can be applied to the concave and convex engaging portion when the pipe advances, and the manufacturing cost of the concave and convex engaging portion can be reduced. .
Since the bent pipe that is bent and extended is used as the installed pipe and the pipe, it is possible to construct a support work that is bent and extended, and the above-described effects can be obtained.
The pipe used for the pipe installation method is formed on an inclined surface in which all or part of the opening edge surface of the pipe is inclined from one end of the pipe toward the other end of the pipe. Can provide a tube.
The tube used in the above-described installation method of the tube is formed in a rectangular shape in cross section, and is inclined from one end of one outer surface of the tube toward the other end of the tube and faces the other outer surface of the tube in parallel. Therefore, a tube having a rectangular cross section capable of realizing the above method can be provided.
Use a tube with a plate on the outer surface, and slide the plate on the outer surface of the installed tube as the tube progresses so that the plate straddles the outer surface of the tube and the outer surface of the installed tube. Therefore, when moving the pipe, the plate becomes a guide to facilitate positioning of the pipe, and the plate abuts the outer surface of the installed pipe, so that the pipe is perpendicular to the plate surface of the plate. Can be prevented from shifting in one direction.
As the tube, use a tube having a pair of plates facing each other on the outer surface, and slide the plate on the outer surface of the installed tube as the tube progresses, so that the plate is connected to the outer surface of the tube and the outer surface of the installed tube. Since the pipe is installed so that the installed pipe is sandwiched between a pair of plates, the pipe becomes a guide when the pipe is advanced, and the pipe is easily positioned, and the pipe is orthogonal to the plate surface of the plate. It can prevent shifting in the direction.
The tube includes an inclined surface in which all or part of the opening edge surface of the tube is inclined from one end of the tube toward the other end of the tube, and a plate that is fixed to the outer surface of the tube and protrudes from the outer surface of the tube. Therefore, when the tube is advanced, the plate serves as a guide to facilitate positioning of the tube, and when the plate hits the outer surface of the installed tube, the tube is one of the directions orthogonal to the plate surface of the plate. It is possible to provide a tube that can prevent displacement in the direction.
The tube is formed in a rectangular shape in cross section, an inclined surface that is inclined from one end of one outer surface of the tube toward the other end of the tube and reaches the other outer surface facing the one outer surface of the tube in parallel, Since the pipe is provided with a pair of plates that are fixed to an outer surface orthogonal to one outer surface of the tube and protrude outward from the edge of one outer surface side of the outer surface, orthogonal to one outer surface and facing each other in parallel. A plate having a rectangular cross section can be provided in which the plate serves as a guide during advancement to facilitate positioning of the tube and prevent the tube from shifting in a direction perpendicular to the plate surface of the plate.

A perspective view showing a pipe and an installed pipe (embodiment 1). The figure which shows the front surface of a pipe | tube, a plane, and a back surface (Embodiment 1). The figure explaining the effect | action of the inclined surface of a pipe | tube (Embodiment 1). The figure which shows the construction procedure of a support work (embodiment 1). A perspective view showing a pipe and an installed pipe (second embodiment). The perspective view which shows the pipe | tube with a plate, and the installed pipe | tube (Embodiment 3). The figure which looked at the pipe and the installed pipe from the side (Embodiment 3). The figure which looked at the pipe and the installed pipe from the side (embodiment 4). The perspective view which shows the pipe | tube with a plate (embodiment 3). The perspective view which shows the pipe | tube with a plate (Embodiment 4). The side view which shows a pipe | tube, and a perspective view (Embodiment 5). The side view which shows a pipe | tube, and a perspective view (Embodiment 6). A perspective view showing a pipe (embodiment 7). The perspective view which shows the pipe | tube with a plate (Embodiment 8). Sectional drawing which shows the example of support work (conventional). The perspective view which shows the shape and installation form of a curved pipe (conventional). Cross-sectional view of a support constructed with curved pipes (conventional). Sectional drawing which shows the example of support work (conventional). The perspective view which shows the example of a support work (conventional).

Embodiment 1
As shown in FIG. 1, the pipe 1 according to the first embodiment has already been installed in the underground 10 when the pipe 1 is installed in the underground 10 by entering the underground 10 from one end 1 a of the pipe 1 and advancing the underground 10. It is formed so that it can be easily advanced in a certain direction along the outer surface of the installed pipe 50 installed in the.
The pipe 1 and the installed pipe 50 are, for example, straight pipes (pipes whose central axes are straight lines), and one outer face (hereinafter referred to as a first face) of one pair of outer faces facing each other. 21) and the other outer surface (hereinafter referred to as the second surface 22) and one outer surface (hereinafter referred to as the third surface 23) of the other pair of outer surfaces facing each other and the other outer surface. It is formed of, for example, a steel pipe having a rectangular cross section at both ends opening (hereinafter referred to as the fourth surface 24).
The pipe 1 and the installed pipe 50 include a plurality of unillustrated through holes penetrating the inner surface 25 and the outer surface (for example, the third surface 23 and the fourth surface 24), and these through holes function as injection holes. To do.

As shown in FIG. 1; FIG. 2, the tube 1 is formed on an inclined surface 26 in which the entire one end opening edge surface 20 is inclined from the one end 1a toward the other end 1b. The inclined surface 26 is inclined from one end 1 a of the first surface 21 toward the other end 1 b of the tube 1 and reaches the second surface 22 of the tube 1 facing the first surface 21 of the tube 1 in parallel. It is an inclined surface. That is, the inclined surface 26 that forms the rectangular annular one end opening edge surface 20 located at one end of the tube 1 includes the one end opening edge surface of the first surface 21, the one end opening edge surface of the second surface 22, and the third surface. 23, and one end opening edge surface of the fourth surface 24.
Since the inclined surface 26 is formed by an inclined surface inclined in the same direction, one end edge 21t of the first surface 21 of the pipe 1 adjacent to the second surface 22 of the installed pipe 50 is formed sharply. When the tube 1 is put into the ground 10 from the one end 1a side, the one end edge 21t of the first surface 21 of the tube 1 is closer to the traveling direction side of the tube 1 than the one end edge 22t located at one end of the second surface 22 of the tube 1. Located in.
The pipe 1 is, for example, a pipe having a configuration in which one end opening edge surface 20 is formed on the inclined surface 26 by obliquely removing one end opening edge surface of a steel pipe formed on a surface orthogonal to the central axis of the steel pipe. is there.
That is, the tube 1 includes a traveling direction guide portion at one end that is the leading side when the tube 1 is put into the ground 10, and the traveling direction guide portion is configured by the inclined surface 26.

  When the pipe 1 is advanced from the one end 1a side to the ground 10 using an unexcavated excavator, the inclined surface 26 acts like a wedge by receiving the earth pressure of the ground 10 as shown in FIG. Then, as indicated by an imaginary line (dashed line), the tube 1 advances through the underground 10 along the inclination of the inclined surface 26.

  As shown in FIG. 4, the installed pipe 50 is formed by, for example, a leading pipe 51 and a plurality of subsequent pipes 52 connected to the leading pipe 51. In this case, as the leading pipe 51, a pipe formed with the opening edge surfaces of both ends of the pipe being orthogonal to the central axis of the pipe, or an inclination as a traveling direction guide section at one end, similar to the pipe 1 described above. A tube having a surface 26 is used, and a tube having both end opening edge surfaces formed on a surface orthogonal to the central axis of the tube is used as the subsequent tube 52.

The installation method of the pipe | tube 1 is demonstrated. As shown in FIG. 4 (a), a supporting work is formed by the installed pipe 50 composed of the leading pipe 51 and the plurality of subsequent pipes 52 already installed in the ground 10, and the outer surface of the installed pipe 50. When the pipe 1 is installed in the underground 10 so as to line up with the installed pipe 50 by advancing the pipe 1 in the extending direction of the installed pipe 50 along the second surface 22 as shown in FIG. Thus, after the first surface 21 of the tube 1 that is the inclination start end side of the inclined surface 26 of the tube 1 is positioned so as to contact the second surface 22 of the installed tube 50, the tube 1 is advanced to the ground 10. By the above-mentioned action of the wedge, the inclined surface 26 of the pipe 1 receives the earth pressure of the underground 10, whereby the first surface 21 of the pipe 1 presses the second surface 22 of the installed pipe 50. The pipe 1 travels through the ground 10 in contact with the two surfaces 22. Then, the pipe 1 is installed in the underground 10 and before the other end (rear end) 1b of the pipe 1 enters the underground 10, a connecting means (not shown) is used to connect the subsequent pipe 53 to the other end 1b of the pipe 1. By connecting the one end (front end) 53a and advancing the tube 1 with a digging device (not shown), the second surface 22 of the installed tube 50 and the first surface 21 of the tube 1 and the succeeding tube 53 are brought into contact with each other. The pipe 1 and the succeeding pipe 53 can be installed in the underground 10. Thereafter, the subsequent pipe 53 is further connected to the rear end (the other end) 53b of the subsequent pipe 53 by using a connecting means (not shown) and the pipe 1 is advanced by the digging device, whereby the second surface of the installed pipe 50 is obtained. The tube 1 and the plurality of subsequent tubes 53 can be installed in a state where the tube 22 is in contact with the first surface 21 of the tube 1 and the plurality of subsequent tubes 53 (see FIG. 4C). The number of the succeeding pipes 53 connected after the pipe 1 is one or more. For example, by connecting the further succeeding pipes 53 sequentially to the succeeding succeeding pipe 53 and proceeding the pipe 1 with the excavating device, the installed pipe 50 The tube 1 and the plurality of subsequent tubes 53 can be installed in the ground 10 in a state where the second surface 22 of the tube 1 and the first surface 21 of the tube 1 and the plurality of subsequent tubes 53 are in contact with each other. 53 can be formed. As the excavation apparatus, for example, an excavation apparatus disclosed in Patent Documents 1 and 2 may be used.
After the pipe 1 and the planned number of succeeding pipes 53 are installed in the ground 10, the ground improvement material is formed in the ground 10 from the inside of the pipe 1 and the succeeding pipe 53 through the injection holes described above. To improve the ground around the pipe 1 and the plurality of subsequent pipes 53 installed in the underground 10.

  Note that the support formed by the pipe 1 and the plurality of subsequent pipes 53 is used as an installed pipe, and the pipe 1 and the plurality of subsequent pipes are formed beside the support formed by the pipe 1 and the plurality of subsequent pipes 53. A new support work composed of the pipe 53 can be formed. That is, by using the support formed by the pipe 1 and the plurality of subsequent pipes 53 as the installed pipe, a plurality of support works made of the pipe 1 and the plurality of subsequent pipes 53 can be formed side by side. A support structure as shown in FIG. 19 can be constructed.

According to the first embodiment, when the pipe 1 is installed in the ground so as to be aligned with the installed pipe 50 by advancing the pipe in the extending direction of the installed pipe 50, one end opening edge surface of the pipe 1 is used as the pipe 1. 20 is formed on an inclined surface 26 inclined from one end 1a of the tube 1 toward the other end 1b of the tube 1, and the inclined surface 26 extends from one end of the first surface 21 (one outer surface) of the tube 1 to the tube. 1 is formed on an inclined surface that is inclined toward the other end 1b of the tube 1 and reaches the second surface 22 (the other outer surface) facing the first surface 21 of the tube 1 in parallel. The pipe 1 is installed along the second surface 22 of the installed pipe 50 by positioning the first surface 21 side of the pipe 1, which is the inclination start end side of the inclined surface 26, on the second surface 22 side of the installed pipe 50. 50, since it is installed in the underground 10 in the extending direction, a pair of concave and convex engaging portions that engage with each other are not provided in the installed pipe 50 and the pipe 1 In addition, the action of the inclined surface 26 provided at one end of the pipe 1 can make the traveling direction constant when the pipe 1 is advanced to the underground 10 along the extension direction of the installed pipe 50, so that the pipe 1 is already installed. The pipe 1 can be installed in the underground 10 so that the underground 10 can be prevented from traveling away from the pipe 50 and the first surface 21 of the pipe 1 is in contact with the second surface 22 of the installed pipe 50.
Accordingly, the pipe 1 and the succeeding pipe 53 connected to the rear of the pipe 1 along the installed pipe 50 can be installed in the underground 10, and the support work by the installed pipe 50 adjacent to each other and the support work by the pipe 1 and the succeeding pipe 53. Can be formed in close contact with each other. Further, the support work by the pipe 1 and the subsequent pipe 53 is used as the installed pipe, and new support works by the pipe 1 and the subsequent pipe can be sequentially formed so as to be in close contact with the support work. In other words, it is possible to construct a plurality of support works so that adjacent objects are in close contact with each other, and the ground around these support works can be improved appropriately, and within the area surrounded by the plurality of support works It is easy to block the groundwater from entering the area, and the subsidence of the surrounding ground can be prevented.
Moreover, according to Embodiment 1, the cost of the pipe | tube 1, the succeeding pipe | tube 53, and the installed pipe | tube 50 can be reduced compared with the case where the pipe | tube provided with the conventional engagement uneven | corrugated | grooved part is used.

  Note that the support work may be formed by one installed pipe 50. Further, a support work may be formed by a single pipe 1.

Embodiment 2
In the first embodiment, the pipe 1, the subsequent pipe 53, and the installed pipe 50 are straightly extended pipes. However, as shown in FIG. 5, an arc is drawn as the pipe 1, the subsequent pipe 53, and the installed pipe 50. A curved pipe having a rectangular cross section when the pipe is cut along a plane orthogonal to the extending direction (the central axis of the pipe) may be used.
In the second embodiment, it becomes possible to construct a support work that bends and extends in the underground 10 as shown in FIGS. 15A and 15B, and in this case, the same as in the first embodiment. An effect is obtained.

Embodiment 3
As shown in FIG. 6; FIG. 7; FIG. 9, a tube 1A having a configuration in which the plate 1 is provided on the tube 1 of Embodiments 1 and 2 is used.
The plate 30 is connected to the third surface 23 of the tube 1 adjacent to the first surface 21 of the tube 1 adjacent to the second surface 22 of the installed tube 50 and orthogonal to the first surface 21. The plate 30 is provided so as to extend over one end 1 a and the other end 1 b of the third surface 23 of the tube 1. That is, the plate 30 is connected to the third surface 23 of the tube 1 by welding or the like so as to extend over the entire length of the tube 1 in the extending direction, and outward from the edge 23e on the first surface 21 side of the third surface 23. It is provided so as to protrude and to be orthogonal to the first surface 21. The plate 30 includes, for example, a pair of plate surfaces 33 and 34 formed by planes facing each other in parallel with each other, one end edge surface 31, the other end edge surface 32, the first surface 21 of the tube 1, and the second surface 22. It is formed by a long flat plate provided with a pair of curved side surfaces 35; 36 having a curvature corresponding to the curvature of the surface. One end edge surface 31 of the plate 30 is positioned on one end (tip) 1 a side of the third surface 23 of the tube 1. One end edge surface 31 of the plate 30 is inclined so as to rise from one plate surface 33 on the side connected to the third surface 23 toward the other plate surface 34 in the direction of the other end 1b (rear end) of the tube 1. It is formed by an inclined surface. That is, the edge surface 31 of the plate is formed on the blade surface, and as the pipe 1A advances, the cutting edge 31t of the blade surface sticks to the third surface 23 of the installed pipe 50, cement, The pickaxe with a ground improvement agent such as milk or water glass functions as a suspension. The other end edge surface 32 of the plate is formed by a surface orthogonal to the plate surfaces 33; 34 and is located on the same plane as the other end edge surface 20 e of the tube 1.
When the pipe 1 </ b> A having the configuration including the plate 30 is installed in the ground 10, one plate surface 33 of the plate 30 is connected to the third surface 23 of the installed tube 50 (the other surface 22 of the installed tube 50 and the other surface 22. The plate 30 is placed on the third surface 23 of the installed tube 50 so as to straddle the tube 1 and the installed tube 50 by moving on the adjacent surface), and installed on the first surface 21 of the tube 1. The space between the second surface 22 of the finished pipe 50 is closed.

  Further, although not shown, when a subsequent tube is connected after the tube 1A, a subsequent tube having a plate having one end edge face which is brought into face contact with the other end edge face 32 of the plate 30 of the pipe 1A is used.

  Accordingly, the first surface 21 of the tube 1A is brought into contact with the second surface 22 of the installed tube 50, and the tube 1A is advanced after placing one end of the plate 30 on the third surface 23 of the installed tube 50. As a result, the cutting edge 31t of the one end edge 31 of the plate 30 lifts the soil or the ground improvement material stuck to the third surface 23 of the installed pipe 50, and the above-described wedge action causes the first of the pipe 1 to move. Since the pipe 1 advances in the ground 10 in a state in which the first surface 21 is in contact with the second surface 22 while pressing the second surface 22 of the installed tube 50, the plate 30 is connected to the third surface 23 of the installed tube 50. By moving up and being installed on the third surface 23 of the installed pipe 50, the space between the second surface 22 of the installed pipe 50 and the first surface 21 of the pipe 1 </ b> A is closed, and the installed pipe 50 is installed. A supporting work in which the first surface 21 of the pipe 1A and the plurality of succeeding pipes 3 is in contact with the second surface 22 can be constructed. In this case, since the cutting edge 31t of the one end edge surface 31 of the plate 30 adheres the soil or ground improvement material stuck to the third surface 23 of the installed pipe 50 when the pipe 1A travels, the pipe 1A can be smoothly moved. Can be advanced.

According to the third embodiment, since the pipe 1A includes the plate 30, when the pipe 1A is advanced, the plate 30 serves as a guide to facilitate positioning of the pipe 1A, and the plate 30 is the first of the installed pipes 50. By striking against the three surfaces 23, the pipe 1A can be prevented from shifting in one of the directions orthogonal to the plate surfaces 33; 34 of the plate 30.
In addition, since the pipe 1A includes the plate 30 extending over the one end 1a and the other end 1b of the third surface 23 of the pipe 1, the plate 30 is already installed when the pipe 1A is installed in the ground 10. Since it moves on the third surface 23 of the pipe 50 and is installed on the third surface 23 of the installed pipe 50, the gap between the first surface 21 of the pipe 1A and the second surface 22 of the installed pipe 50 is blocked. In addition, the water tightness between the support works is improved, the effect of blocking the groundwater from entering the area surrounded by the support works is further improved, and the subsidence of the surrounding ground can be prevented.

Embodiment 4
As shown in FIG. 8; FIG. 10, a tube 1B provided with the plate 30 on both the third surface 23 and the fourth surface 24 of the tube 1 may be used. That is, the tube 1 is fixed to the third surface 23 and the fourth surface 24 orthogonal to the first surface 21 of the tube 1 and protrudes outward from the edge 23e on the first surface 21 side of the third surface 23 and the fourth surface 24. If the pipe 1B provided with a pair of plates 30; 30 that are orthogonal to the first surface 21 and are parallel to each other is used, the watertightness between the support works is further improved, and the area within the area surrounded by the support works The effect of blocking the entry of groundwater from the outside can be further improved, and settlement of the surrounding ground can be prevented. Further, since the third surface 23 and the fourth surface 24 of the installed pipe 50 are sandwiched between a pair of plates provided so as to face each other in parallel, the pipe 1B is orthogonal to the plate surfaces 33; 34 of the plate 30. It can prevent shifting in the direction.

6 to 8 illustrate a pipe provided with a plate 30 as a curved pipe as a pipe, and FIG. 9: FIG. 10 illustrate a pipe provided with the plate 30 as a straight extension pipe. Further, as shown in FIG. 9: FIG. 10, one end edge surface 31 of the plate 30 may not be formed on the blade surface.
In the above description, an example is shown in which the blade edge 31t of the one end edge 31 of the plate 30 and the one end edge 31 are provided so as to be inclined and extended in the inclination direction of the inclined surface 26. The blade edge 31t and the edge surface 31 of 31 may not be provided so as to be inclined and extended in the inclination direction of the inclined surface 26. In the above description, the plate 30 is provided so as to extend over the one end 1a and the other end 1b of the tube 1. However, the plate 30 is provided intermittently between the one end 1a and the other end 1b of the tube 1. Also good.

Embodiment 5
In the first to fourth embodiments, as shown in FIG. 11, the one end edge 21 t of the first surface 21 in the one end opening edge surface 20 of the tube 1 may not be sharp. In Embodiments 1 to 4, as shown in FIG. 12, the inclined surface 26 may not be an inclined surface extending from the first surface 21 to the second surface 22. That is, when the tube 1 is moved to the ground 10 after the first surface 21 of the tube 1 is positioned so as to be in contact with the second surface 22 of the installed tube 50, the above-described wedge action is achieved. Thus, an inclined surface 26 that advances the first surface 21 of the tube 1 while making contact with the second surface 22 of the installed tube 50 may be provided at one end of the tube 1. That is, it is only necessary that a part of the one-end opening edge surface 20 is formed on the inclined surface 26.

Embodiment 6
The present invention can also be applied to a tube having a circular cross section. That is, as shown in FIG. 13, a tube 1 having an inclined surface 26 as a traveling guide portion at one end portion of a tube having a circular cross section may be used. Further, as shown in FIG. 14, a circular cross-section tube 1A having a cross-section arc-shaped plate 30 placed on the outer peripheral surface 50f of the installed pipe 50 and a pair of plates 30; May be.

1; 1A; 1B tube, 1a one end of the tube, 1b the other end of the tube, 10 underground,
20 One-end opening edge surface, 26 inclined surface, 30 plates, 50 installed pipes.

Claims (9)

In the pipe installation method to install the pipe in the ground so that it is aligned with the installed pipe by advancing the pipe in the extension direction of the installed pipe along the outer surface of the installed pipe already installed in the ground,
As the tube, use one in which all or part of the opening edge surface of the tube is formed on an inclined surface inclined from one end of the tube toward the other end of the tube, and the inclined start end side of the inclined surface of the tube is already installed. A method for installing a pipe, wherein the pipe is placed on the outer surface side of the pipe, and the pipe is installed in the ground by being advanced in the extending direction of the installed pipe along the outer surface of the installed pipe. In the pipe installation method to install the pipe in the ground so that it is aligned with the installed pipe by advancing the pipe in the extension direction of the installed pipe along the outer surface of the installed pipe already installed in the ground,
Installed pipes and pipes that have a rectangular cross section are used, and the pipe is formed on an inclined surface in which the entire opening edge of the pipe is inclined from one end of the pipe toward the other end of the pipe. The inclined surface is formed on an inclined surface that is inclined from one end of one outer surface of the tube toward the other end of the tube and reaches the other outer surface facing the one outer surface of the tube in parallel. , One outer surface side of the pipe, which is the slope start end side of the inclined surface of the pipe, is positioned on the outer surface side of the installed pipe, and the pipe is advanced along the outer surface of the installed pipe in the extending direction of the installed pipe. Installation method of the pipe characterized by installing in the.   2. The pipe installation method according to claim 1, wherein a bent pipe that is bent and extended is used as the installed pipe and the pipe.   It is a pipe | tube used for the installation method of the pipe | tube of Claim 1, Comprising: All or one part of the one end opening edge surface of a pipe | tube was formed in the inclined surface which inclines toward the other end direction of a pipe | tube from the one end of a pipe | tube. Tube characterized by.   A pipe used for the pipe installation method according to claim 2, wherein the pipe is formed in a rectangular shape in cross section, and is inclined from one end of one outer surface of the pipe toward the other end of the pipe. A tube comprising an inclined surface that reaches the other outer surface facing in parallel.   Use a tube with a plate on the outer surface, and slide the plate on the outer surface of the installed tube as the tube progresses so that the plate straddles the outer surface of the tube and the outer surface of the installed tube. The pipe installation method according to claim 1 or 2, wherein the pipe is installed.   As the tube, use a tube having a pair of plates facing each other on the outer surface, and slide the plate on the outer surface of the installed tube as the tube progresses, so that the plate and the outer surface of the installed tube The pipe installation method according to claim 1 or 2, wherein the pipe is installed so that the installed pipe is sandwiched between a pair of plates.   A pipe used for the pipe installation method according to claim 6 or 7, wherein all or a part of one end opening edge face of the pipe is inclined from one end of the pipe toward the other end of the pipe; And a plate fixed to the outer surface of the tube and protruding from the outer surface of the tube.   A pipe used in the pipe installation method according to claim 6 or 7, wherein the pipe is formed in a rectangular shape in cross section, and is inclined from one end of one outer surface of the pipe toward the other end of the pipe. An inclined surface that reaches the other outer surface that is parallel to one outer surface, and an outer surface that is fixed to an outer surface orthogonal to one outer surface of the pipe and protrudes outward from an edge on one outer surface side of the outer surface. A tube comprising a pair of plates that are orthogonal and face each other in parallel.

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