JPH07158382A - Pipe and pipe-roof method making use thereof - Google Patents

Abstract

PURPOSE:To obtain pipes capable of being installed over long distance by providing connection members to the pipes constructing an underground wall, etc., mounting reinforcing materials used for liquid tightness to the in sides of them, and pushing them into a hole excavated by a shield machine. CONSTITUTION:An interlocking gap 14 or a projected member 18 is provided to the end face of a pipe 10 having a square section used for construction of underground structures such as an underground wall, a reinforcing body, a cut-off body, etc. A plate-like member 16 is mounted in a state of liquid tightness between up and down main bodies 12 to form a space and, at the same time, reinforcement against earth pressure in the vertical direction is made. After that, the ground is excavated by a shield machine having the same sectional shape as that of the pipe 10, and pipes 10 and 10a are subsequently pushed into an excavate track to arrange. A joint section can be of various shape, and the pipes 10 can be arranged not only in a state of straight line, but also in a circular state. According to the constitution, the pipes can be arranged over long distance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe used for constructing an underground structure such as an underground wall, a reinforcing body and a water stop body, and a pipe roof construction method using the pipe.

[0002]

2. Description of the Related Art In a pipe roof construction method for constructing an underground structure such as an underground wall, a reinforcing body, and a water blocking body, a plurality of columnar bodies having a cylindrical main body are generally used. Each columnar body is laid substantially horizontally by a pipe propulsion method using an excavator arranged at the front end and an original pushing device arranged at the rear.

As one of the pipes used in this type of pipe roof construction method, a cylindrical main body portion, and first engaging means provided on the main body portion and extending continuously in the longitudinal direction of the main body portion, There is one that is fixed to the outside of the main body and includes a second engaging means that is engageable with the first engaging means of the adjacent pipe (Japanese Utility Model Laid-Open No. 4-17491).

In this known pipe, the first engaging means has a pair of first edge portions forming a continuous gap from one end to the other end in the longitudinal direction of the cylindrical main body. Second
The engaging means has a second edge that is received in the space of a pipe of the same kind that is laid next to it and is engageable with the inside of the first edge of the pipe.

However, in the known pipe used for the pipe roof construction method, the cross-sectional shape of the outside is circular, so that the earth pressure acting on the outer peripheral surface from the upper side to the lower side acts on the pipe as a pressing force to crush the pipe. Not only does it act on the pipes as a displacement force that displaces horizontally adjacent pipes in the horizontal direction, but the horizontally adjacent pipes are centered on an imaginary axis line that extends in the axial direction near the engaging parts of both pipes. It acts on the pipe as a bending force to bend it.

In the case of particularly soft ground, the above displacement force acts as a force for displacing the pipe being laid in the horizontal direction with respect to the pipe being laid, and the bending force is the force being applied to the pipe being laid. It acts as a force to bend the pipe downward. As a result, the pipe is laid while being displaced horizontally or vertically with respect to the laid pipe.

Such a problem is caused by the fact that the ground on which the pipe is laid is weak, that the pipe having a circular cross-sectional shape is easily rotated and displaced by an external force, and that the displacement force or bending force is mixed. Occurs.

On the other hand, in the pipe roof construction method, generally, as an excavator, an earth auger rotatably received in a casing having substantially the same diameter as the pipe, and a driving source for excavation arranged in a vertical shaft. Is used.

However, in such an excavator, since the earth auger is rotated by the drive source arranged in the vertical shaft, the distance between the face and the drive source becomes longer along with the excavation, and as a result, the excavation becomes large. Requires torque. Therefore, the conventional excavator cannot excavate a long distance, and the distance between the vertical shafts cannot be increased.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to make adjacent pipes relatively difficult to be displaced.

Another object of the present invention is to provide a method for constructing an underground structure which can increase the distance between vertical shafts.

[0012]

SOLUTION, ACTION, EFFECT The pipe of the present invention comprises a tubular main body, a first engaging means provided on the main body, and a second engaging means provided on the main body. A second engaging member that is engageable with the first engaging means of the same type of pipe that is arranged next to
Engaging means of. The main body has an outer shape of a substantially quadrangular cross section formed by a plurality of surface portions.

The pipe extends horizontally parallel to the pipe which is laid substantially horizontally next to it, and its second engaging means engages with the first engaging means of the adjacent pipe, Is laid. The underground structure is constructed by sequentially arranging a plurality of pipes in a polygonal shape, a circular shape, a V-shape, an L-shape, a U-shape, or the like.

The displacement force for displacing the pipe horizontally with respect to the adjacent pipe and the bending force for bending the pipe downward with respect to the adjacent pipe act on at least one surface portion of the main body portion and the main body portion. Is transmitted to the ground from at least one other surface part of the.

At this time, the reaction force acting on the pipe from the ground is larger in a flat surface than in the case where the portion for transmitting the displacement force or the bending force to the ground is a curved surface. For this reason, a square tubular pipe is
Not only is it difficult to rotate around the axis, but it is also difficult to displace in the direction orthogonal to the axis even if an external force is received in the ground.

As described above, according to the present invention, since the outside of the main body has a rectangular cross section, even if the pipe receives an external force even in the soft ground, it is adjacent to the cylindrical pipe. It is difficult to displace with respect to the pipe.

The first engaging means has a pair of first edge portions that directly or indirectly form a continuous gap in the main body portion from one end portion to the other end portion in the longitudinal direction of the main body portion. However, the second engaging means is engageable with a second edge portion extending outside the main body portion in the longitudinal direction of the main body portion, and the first edge portion of the pipe arranged adjacent to the second edge portion. It can have a second edge.

Further, a first member which is disposed inside the main body portion and extends in the longitudinal direction of the main body portion, and which communicates with the main body portion through a space which communicates with the main body portion through the gap. And a second member formed inside the main body portion, wherein the second engaging means is a second member which is disposed outside the main body portion and extends in the longitudinal direction of the main body portion. A second member having a second edge portion, wherein the second member is an elongated plate-shaped first portion having a thickness dimension smaller than the width dimension of the gap, and at one end edge in the width direction. A first portion fixed to the outer surface of the main body portion, and a second portion continuing to the other widthwise end edge of the first portion and having a cross-sectional shape larger than the width dimension of the gap and smaller than the space. And a second portion defining the second edge. Kill.

However, the first engaging means is at least one first member which is fixed to the outside of the main body portion and extends in the longitudinal direction of the main body portion, and which has the first edge portion. The main body part includes at least one first member that forms a space, which is communicated with the outside through the gap, outside the main body part, and the second engaging means is arranged outside the main body part. Of at least one second member extending in the longitudinal direction of the second member, the second member being an elongated plate-shaped first portion having a thickness dimension smaller than the width dimension of the gap and having one end in the width direction. A first portion fixed to the outside of the main body portion, and a second portion continuing to the other widthwise end edge of the first portion, the sectional shape being larger than the width dimension of the gap and smaller than the space. And defining the second edge It may comprise a second site.

It is preferable that the first member continuously extends from one end to the other end in the longitudinal direction of the main body portion and is liquid-tightly fixed to the main body portion. This can prevent groundwater and the like from entering the main body from the space formed by the main body and the first member.

It is preferable that the second member continuously extends from one end to the other end in the longitudinal direction of the main body portion and is fixed to the main body portion in a liquid-tight manner. As a result, it is possible to prevent groundwater or the like from passing between the adjacent pipes.

The first engaging means may be formed on one surface portion of the surface portions, and the second engaging means may be formed on another surface portion of the surface portions. it can.

The pipe roof construction method of the present invention excavates the ground by a shield type tunnel excavator having substantially the same outer shape as the main part of the pipe having the above-mentioned shape, and makes the pipe into an excavation mark by the excavator. Including placing.

According to the pipe roof construction method of the present invention, since the pipe is arranged at the excavation mark while excavating the ground by the shield tunnel excavator, even if the excavation distance becomes long,
It does not require as much torque as is required with earth augers, thus allowing longer spacing between shafts.

It is preferable to push the pipe into the excavation mark by means of an extruding device arranged behind the pipe so that the excavator is moved forward and the pipe is arranged in the excavation mark.

When a conventional excavator using an earth auger is used to advance the pipe as described above, the cross-sectional shape of the outer shape of the pipe is almost quadrangular in the case of the pipe. In this case, since it is almost circular, a large propulsion resistance is generated at the corner portion of the front end face of the pipe. However, according to the present invention, since the excavator has substantially the same outer shape as the main portion of the pipe, a large propulsion resistance does not occur in the corner portion of the front end face of the pipe.

The main body of the pipe of the present invention may have a rectangular tubular shape, a square tubular shape, or the like if the cross-sectional shape of its outer surface is a quadrangle consisting of four surface portions corresponding to each side of the quadrangle. It may have any shape, and may be chamfered at each of the four corners or at any corner.

Further, as described above, instead of forming the first and second engaging means on different surface portions, the first engaging means is provided on one of the corners of the main body. May be formed on a portion, and the second engaging means may be formed on another corner portion of the corner portions. In this case, it is preferable to chamfer the corner portion where the engaging means is formed.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1 (A), a pipe 10 includes a rectangular cylindrical main body 12 having four surface portions corresponding to respective sides of a quadrangle. The main body portion 12 has a pair of edge portions 12a that form a gap 14 continuous from one end to the other end in the longitudinal direction on one surface portion.

A first member 16 and a second member 18 are fixed to the inside and outside of the main body 12 by welding or the like, respectively. First and second members 16, 18
Extend continuously from one end to the other end of the main body 12 in the longitudinal direction.

The first member 16 is an elongated flat plate, and is continuously welded over the entire length range to the inner side surfaces of both surface portions adjacent to the surface portion having both edge portions 12a at both ends in the width direction by welding or the like. It is fixed tightly.

As a result, the first member 16 is moved to the gap 14
The space 20 communicated with the outside of the main body portion 12 through is formed inside the main body portion 12 in cooperation with both edge portions 12 a of the main body portion 12. Further, the space 20 is liquid-tightly partitioned by the first member 16 from the remaining part of the internal space of the main body portion 12, that is, the space 22.

The second member 18 includes a first portion 18a having an elongated plate shape and an elongated plate-shaped first portion 18a which is continuous with one end edge in the width direction of the first portion and is substantially perpendicular to the first portion 18a. The second portion 18b has a T-shaped cross-sectional shape. The second member 18 is fixed in a liquid-tight manner continuously over the entire length range by welding or the like on the outside of the surface portion facing the surface portion where the gap 14 is formed.

The first portion 18a has a thickness dimension smaller than the width dimension of the gap 14, and is fixed to the main body portion 12 at the other edge in the width direction. On the other hand, the second portion 18b has a width larger than the width of the gap 14 and smaller than the space 20, and is fixed to one end edge of the first portion 18a in the width direction at the center portion in the width direction of itself. Has been done.

FIG. 1B shows the pipe 1 shown in FIG.
The pipe 10a used for laying 0 is shown. Pipe 10a
Has a gap 14 in each of two facing surface portions of the main body 12 and has two first members 16. The two first members 16 are opposite to each other in the main body 12
It is liquid-tightly fixed to one surface part by welding etc. over the entire length range.

As a result, each first member 16 has a gap 1
A space 20 communicated with the outside of the main body portion 12 via 4 is formed inside the main body portion 12 in cooperation with the main body portion 12. Also,
Each space 20 is liquid-tightly partitioned by the first member 16 from the remaining part of the internal space of the main body portion 12, that is, the space 22.

At the time of laying, first, the pipe 10 shown in FIG.
a is laid substantially horizontally, and then a plurality of pipes 10 shown in FIG. 1 (A) are sequentially laid substantially horizontally. Each pipe is arranged at the rear end of the shield type tunnel excavator having a cross-sectional area that is substantially the same as the cross-sectional area of its main body 12, and then, with the extruding device, from the starting vertical shaft to the reaching vertical shaft together with the excavator. By advancing toward, they are laid one by one next to each other.

As shown in FIG. 1C, when the pipe 10a is moved forward, the pipe 14a is maintained in a posture in which the gap 14 is horizontal. On the other hand, each pipe 10 has a second portion 1
8b is maintained in such a posture that it is in the space 20 of the installed pipe. Therefore, the second member 18 does not generate a large propulsion resistance. At the time of laying, the edge portion 12a and the second portion 18b act as a guide for moving the pipe being laid along the laid pipe.

In FIG. 1C, with respect to the pipe 10a, the pipes 10 laid on the right side and the pipes 10 laid on the left side are moved forward in a posture in which the left and right sides are opposite to each other at the time of laying. . To do so, for example, each pipe 10 may be rotated 180 degrees about its longitudinal axis, or the front end side and the rear end side may be reversed.

In a state where a plurality of pipes are laid in the ground, the edge portion 12a of the adjacent pipes and the second portion 18b of the second member 18 have a force in the direction of separating the adjacent pipes from each other. Even if it acts on, the two pipes are prevented from coming into contact with each other and separating from each other. Therefore, both edges 12a,
The widthwise edges of the second portion 18b act as engaging means or engaging edges.

In the state where a plurality of pipes are laid in the ground, earth pressure acts on each pipe mainly from the upper side to the lower side. For this reason, in each pipe, the earth pressure is received by the upper surface portion and transmitted to the ground by the lower surface portion, and the reaction force due to the earth pressure is received from the ground by the lower surface portion. The first member 16 acts as a reinforcing member that prevents the main body portion 12 from being deformed by earth pressure so that the gap 14 becomes smaller.

In the state of being laid in the ground, the rectangular tubular pipe has a flat surface at the portion receiving the reaction force, so that the portion receiving the reaction force has a curved surface around the axis as compared with the cylindrical pipe having the curved surface. Not only is it difficult to rotate, but it is difficult to displace in the direction orthogonal to the axis even if an external force is applied to the ground that is soft.

Among the earth pressures acting on the pipes through the earth and sand between the adjacent pipes, the displacement force for displacing the adjacent pipes in the horizontal direction is, in the example shown in the figure, the facing surface portions of the adjacent pipes are substantially vertical. Therefore, it hardly acts on the pipe.

However, even if such a displacement force acts on the pipe in the process of being laid, the pipe will generate
Of the two surface portions, one surface portion receives the flat surface portion and the other flat surface portion transmits the ground surface to the ground, and the reaction force is received from the ground surface to the other flat surface portion. Therefore, even if the ground is soft, the pipe being laid is less likely to be displaced with respect to the adjacent pipe than the cylindrical pipe.

The above-mentioned displacement force is a force that separates the adjacent pipes from each other, particularly when the pipes are horizontally adjacent to each other, and is between the engaging means of the horizontally adjacent pipes, that is, both edge portions 12a. And the second portion 18b, and between the main body 12 and the second member 18 as a tensile force.

Such a pulling force is applied to the engaging means 12a, 18
When acting on b, particularly in the case of soft ground, the pipe being laid and the pipe adjacent thereto are disengaged or the second member 18 is separated from the main body 12. Therefore, in the case of a cylindrical pipe, it is necessary to increase the joint strength of the engaging means of the adjacent pipes and the joint strength of the second member to the main body, which is expensive.

However, according to the above-mentioned square tubular pipe, the displacement force is large and the section modulus is large as compared with the cylindrical pipe. Since it is not necessary to increase the bonding strength and the bonding strength of the second member to the main body,
It will be cheaper.

As with the pipes 10 and 10a described above, the first
If the second members 16 and 18 are liquid-tightly fixed to the main body portion 12 over the entire length range, groundwater or the like can pass between the adjacent pipes in a state where the pipes are laid underground. Can be prevented, which is preferable.

However, depending on the ground, the first and second
It may not be necessary to use a pipe in which the members 16 and 18 are fixed to the main body 12 in a liquid-tight manner over the entire length range. In such a case, the first and second members 16,
18 at a plurality of points in the longitudinal direction,
May be fixed to the first and second members 16, 18
Need not be continuous in the longitudinal direction of the main body portion 12, for example, a plurality of first members 16 and a plurality of second members 16.
The members 18 may be arranged at intervals in the longitudinal direction of the main body 12.

At the time of laying, one or more bags containing a hardening agent such as water glass are placed in the space 20, and the pipe 1
It is preferable to lay 0. With this configuration, the space 20 is closed by the bag, so that the space 20 can be prevented from acting as water.

The bag is preferably broken by the second member 18 of the next pipe when the next pipe is laid. As a result, the curing agent in the bag coagulates and solidifies with the passage of time, so that the bag can be closed.

In the embodiment shown in FIG. 1, the pipes 10, 10
a has the gap 14 and the first member 16 in the center portion in the width direction of the surface portion of the main body portion 12. Therefore, the pipe 10,
10a is suitable for the pipe roof construction method in which a plurality of pipes are sequentially arranged next to each other in the horizontal direction.

However, the sectional shape of the underground structure using the plurality of pipes 10 and 10a is square, circular, semicircular, U-shaped, U-shaped, V-shaped, inverted U-shaped, inverted V-shaped. It may have any shape such as a gate shape.

Therefore, for example, by arranging the pipes so that the interval between the lower ends of the adjacent pipes is smaller than the interval between the upper ends, an arcuate, circular, or inverted U-shaped underground structure can be constructed. it can. In addition, if a pipe having a gap 14 in one surface portion and a second member 18 in the other surface portion of two adjacent surface portions of the main body is used in the middle, a hook is formed at that pipe portion. It is possible to construct an underground structure that bends into a shape, an L shape, an inverted V shape, or the like.

As is apparent from the above, the first and second members 1 centered on the axis of the main body portion 12 of the pipe 10.
The angle formed by 6 and 18 does not have to be 180 degrees as in the illustrated example, and can be set to any angle depending on the sectional shape of the underground structure to be constructed. In particular, when a plurality of pipes are laid in an L-shape, a V-shape, etc., a pipe having a gap 14 and a second member 18 on adjacent surface portions is used as the pipe laid at the corners. It is preferable.

It is not necessary to provide the gap 14 and the second member 18 at the central portion in the width direction of the corresponding surface portion, and the gap 14 and the second member 18 are opposed to each other like the pipes 24 and 24a shown in FIG. It may be provided below (or above) the center portion in the width direction of the pair of surface portions. Also, the main body 1
The cross-sectional shape of 2 does not necessarily have to be rectangular, and may be trapezoidal, such as the pipes 26 and 26a shown in FIG.

In the case of the pipes 24 and 24a shown in FIG. 2, they may be arranged linearly as shown in FIG. 1 (C), or may be arranged in an arc shape as shown in FIG. 2 (C). Good.
On the other hand, in the case of the pipes 26 and 26a shown in FIG. 3, they may be arranged linearly as shown in FIG. 1 (C), but rather they may be adjacent pipes as shown in FIG. 3 (C). It is preferable that the surface portions of the are contacted with each other and arranged in an arc shape.

A plurality of pipes are shown in FIG. 2 (C) and FIG.
When they are arranged in an arc shape as shown in (C), the space between adjacent pipes becomes V-shaped, and the force for separating the pipes acts on the adjacent pipes. However, this force is much smaller than the force acting on the cylindrical pipe. Even if such a force acts on a pipe in the course of laying on soft ground, the portion receiving the reaction force is a flat surface, so that the pipe in the course of laying is more adjacent to a pipe than a cylindrical pipe. It is difficult to displace with respect to the pipe.

Instead of using the elongated flat plate-shaped first member 16 in the embodiments shown in FIGS. 1 to 3, members having other shapes may be used.

The pipes 30 and 30a shown in FIG. 4 have a U-shaped first member 3 instead of the first member 16 shown in FIG.
2 is used.

Each first member 32 forms a space 34, which is communicated with the outside of the main body portion 12 through the gap 14, inside the main body portion 12 in cooperation with both edge portions 12 a of the main body portion 12. , Is continuously and liquid-tightly fixed to the inner surface of the surface portion having the edge portion 12a over the entire length range by welding or the like. As a result, the first member 32 liquid-tightly separates the space 34 from the remaining portion of the internal space of the main body portion 12, that is, the space 36, and the gap 14 becomes smaller.
Prevent deformation of 2.

In order to prevent the deformation of the main body 12 such that the gap 14 becomes small, it is preferable to dispose a plurality of reinforcing members 38 made of a mold material such as L-shaped steel at intervals in the longitudinal direction of the main body 12. . Each reinforcing member 38 is fixed by welding or the like to the inner side surfaces of both surface portions adjacent to the surface portion having the edge portions 12a at both ends thereof. In this case, the first member 32 may be fixed to the reinforcing member 38 by welding or the like.

The pipes 40 and 40a shown in FIG. 5 are replaced by the pipe 3 shown in FIG. 4 instead of the first member 16 shown in FIG.
The U-shaped first member 32 and the reinforcing member 38 at 0 and 30a are used.

The pipes 42 and 42a shown in FIG. 6 are the same as the pipe 3 shown in FIG. 4 in place of the first member 16 shown in FIG.
The U-shaped first member 32 and the reinforcing member 38 at 0 and 30a are used.

The pipes 30 and 30a shown in FIG. 4, the pipes 40 and 40a shown in FIG. 5, and the pipe 42 shown in FIG.
All of 42a may be arranged in a straight line or may be arranged in an arc. In addition, these pipes are quadrangular, semicircular, circular, U-shaped, U-shaped, V-shaped,
It may be arranged to construct an underground structure having a cross-sectional shape such as an inverted U shape, an inverted V shape, and a gate shape.

In the actual pipe roof construction method, prior to laying the pipe 10, 24, 26, 30, 34 or 42, the pipe 10a, 24a, 26a, 30a,
It is not necessary to lay 34a or 42a. in this case,
Instead of the pipe 10a, 24a, 26a, 30a, 34a or 42a, the pipe 10, 24, 26, 30, 3
4 or 42 itself may be laid, or a pipe without the first member 16 and the gap 14 but with two second members 18 may be arranged.

Instead of directly forming the engaging edge portion 12a on the surface portion of the main body portion, a member having the engaging edge portion may be provided outside the main body portion 12.

In the embodiment shown in FIG. 7A, a first member 50 having a C-shaped cross section and a second member 52 having a circular cross section like an eyebolt are used. The first and second members 50 and 52 extend in the longitudinal direction of the main body portion 12.

The first member 50 is fixed to the outside of one surface portion of the main body 12 so as to form a gap 54 and a space 56 continuous in the longitudinal direction of the main body 12 on the outside of the main body 12. There is. The second member 52 is fixed to the outside of the other surface portion of the main body portion 12 at the plate-shaped first portion 52a so that the second portion 52b having the circular cross section is located outside the main body portion 12. ing.

The sectional shape of the second portion 52b of the second member 52 is smaller than that of the space 56. The width dimension of the gap 54 is larger than the thickness dimension of the first portion 52a of the second member 52, but smaller than the outer diameter dimension of the second portion 52b of the second member 52.

At the time of laying, the pipe is the second member of the second member 52.
The part 52b of the space 5 of the first member 50 of the adjacent pipe
6 or the first member 50 is advanced to receive the second portion 52b of the second member 52 of the adjacent pipe into the space 56.

In the laid state, the first member 50
Both edge portions 50a forming a gap 54 of the second member 52
The second portion 52b can be engaged with, for example, when a force separating the adjacent pipes acts on the adjacent pipes. Therefore, the both edge portions 50a and the second portion 52b act as engaging means or engaging edge portions.

In the embodiment shown in FIG. 7B, a pair of L-shaped first members 60 and a second member 62 having a circular head in cross section are used. First and second members 60, 62
Extend in the longitudinal direction of the main body 12.

The two first members 60 are formed on one surface portion of the main body portion 12 so that the gap 64 and the space 66 continuous in the longitudinal direction of the main body portion 12 cooperate with each other to form the outside of the main body portion 12. It is fixed to the outside at intervals in the width direction of the surface portion. The gap 64 is defined by the edges 6 of both the first members 60.
It is formed by 0a.

The second member 62 is the second member shown in FIG.
Similar to the member 52 of the above, it has a plate-shaped first portion 62a and a circular cross-section head portion, that is, a second portion 62b,
Further, it is fixed to the main body portion 12 at the first portion 62a.

The sectional shape of the second portion 62b of the second member 62 is smaller than that of the space 66. The width dimension of the gap 64 is larger than the thickness dimension of the first portion 62a of the second member 62, but smaller than the outer diameter dimension of the second portion 62b of the second member 62.

In the installed state, both edge portions 60a forming the gap 64 and the second portion 62 of the second member 62.
The term “b” is engageable when, for example, a force separating the adjacent pipes acts on the adjacent pipes. Therefore, the both edge portions 60a and the second portion 62b act as engaging means or engaging edge portions.

In the embodiment shown in FIG. 7C, a pair of L-shaped first members 70 and a pair of L-shaped second members 72 individually corresponding to the first members are provided. To use. Both first members 70 and both second members 72 extend in the longitudinal direction of the main body portion 12.

Both the first members 70 cooperate with each other in a gap 74 and a space 76 which are continuous in the longitudinal direction of the main body 12 in the same manner as the first member 60 shown in FIG. 7B.
So as to be formed on the outer side of the main body portion 12, the main body portion 12 is fixed to the outer side of one surface portion at intervals in the width direction of the surface portion. The gap 74 is formed by the edge portions 70 a of both the first members 70.

In both of the second members 72, the first portion 72a extends at a right angle from one surface portion of the main body 12 and the second portion 72b extends toward the corresponding first member 7a. The first portion 72a is fixed to the outside of one surface portion of the main body 12 at intervals in the width direction of the surface portion.

The distance dimension between the tips of the second portions 72b of both the second members 72 is smaller than that of the space 76 in the same direction. In addition, the width dimension of the gap 74 is determined by the two second members 22.
It is larger than the distance dimension between the outer surfaces of the first portions 72a, but smaller than the distance dimension between the tips of the second portions 72b of the second members 72.

Even when the first and second members 70 and 72 are used, the two edge portions 70a forming the gap 74 and the second portion 72b of the second member 72 are laid in the laid state. Engagement is possible when the force separating the adjacent pipes acts on the adjacent pipes. Therefore, the both edge portions 70a and the second portion 72b act as engaging means or engaging edge portions.

In the embodiment shown in FIG. 7D, a pair of L-shaped first members 80 and a second member having a T-shaped cross-sectional shape.
The member 82 is used. First and second members 80, 8
2 extends in the longitudinal direction of the main body portion 12.

Both the first members 80 cooperate with each other in the gap 84 and the space 86 which are continuous in the longitudinal direction of the main body portion 12 like the first member 60 shown in FIG. 7B.
So as to be formed on the outer side of the main body portion 12, the main body portion 12 is fixed to the outer side of one surface portion at intervals in the width direction of the surface portion. The gap 84 is formed by the edge portions 80 a of both the first members 80.

Like the second member 18 shown in FIGS. 1 to 6, the second member 82 has a plate-shaped first portion 82a and a plate-shaped second portion 82b. Also, the first part 82
It is fixed to the main body portion 12 at a.

The sectional shape of the second portion 82b of the second member 82 is smaller than that of the space 86. The width dimension of the gap 84 is larger than the thickness dimension of the first portion 82a of the second member 82, but smaller than the outer diameter dimension of the second portion 82b of the second member 82.

In the laid state, both edge portions 80a forming the gap 84 and the second portion 82 of the second member 82.
The term “b” is engageable when, for example, a force separating the adjacent pipes acts on the adjacent pipes. Therefore, the both edge portions 80a and the second portion 82b act as engaging means or engaging edge portions.

The pipe of the present invention can be variously modified without being limited to the above embodiment. For example, the second
In addition to the above, a member having an arbitrary cross-sectional shape such as a member having a Y-shaped cross-sectional shape and a pair of members having a P-shaped cross-sectional shape can be used as the member of 1. Further, the present invention can be applied to any pipe made of steel, reinforced concrete, steel and concrete, steel and reinforced concrete.

An embodiment of the shield type tunnel excavator used in the pipe roof construction method of the present invention will be described with reference to FIGS.

Square shield tunnel excavator 110
Is a rectangular cylindrical shield body 112, a partition wall 114 provided on the shield body, a drive mechanism 116 supported by the partition body, and a first direction (a direction perpendicular to the axis of the shield body 112 by the drive mechanism). In the illustrated example, a cutter assembly 118 that reciprocates in the vertical direction to excavate a face is included.

The shield main body 112 is divided into a first main body portion 120 having a square tubular shape and a second main body portion 122 having a square tubular shape received at the rear end portion of the first main body portion. . The first and second body portions 120 and 122 are connected by four direction correcting jacks 124a and 124b arranged corresponding to the corners of the quadrangle.

The shield body 112 has a plurality of rectangular tubular pipes that push the thrust generated by an unillustrated extruding device into the excavation mark by the excavator 110, as in the known tunnel construction method. By receiving through 126, it is advanced while excavating the ground.

As the former pushing device, for example, Japanese Patent Publication Sho 62
It is possible to use a conventional push device for a round shield type tunnel excavator as described in Japanese Patent Publication No.-40520, Japanese Patent Publication No. 4-54797 and the like. The pipe 126 is made of reinforced concrete, and the engaging means and the like are omitted.

The inside of the first main body 120 is partitioned by the partition wall 14 into a front area 128 on the face of the face and a rear area 130 behind the front area 128 and maintained at atmospheric pressure. The anterior region 128 is divided by a grid 132 into a shear chamber or first chamber 134 for receiving the excavated earth and sand, and a muddy chamber or second chamber 136 following the lower rear end of the first chamber. . The second chamber 136 is formed behind the first chamber 134 and below the shield body 112.
The second chamber 136 is connected to a pipe 138 for supplying muddy water and a pipe 140 for discharging earth and sand together with muddy water.

The drive mechanism 116 includes a drive source 144 supported by the partition wall 114 by a bracket 142 and a second direction (right and left in FIG. 8 in the illustrated example, which is orthogonal to the axis of the shield body 112 and the first direction). Crankshaft 146 rotatably supported around the lower part of partition wall 114 and having eccentric parts at both ends of the main body part.
And a transmission mechanism 148 for transmitting the rotation of the drive source 144 to the crankshaft 146, and an arm 150 individually corresponding to the eccentric portion and rotatably supported by the corresponding eccentric portion.
And a pair of links 15 connected to the upper portion of the partition wall 114 so as to be angularly rotatable about an axis extending in the second direction.
2 and.

The drive source 144 is a known one having a rotation source such as an electric motor and a speed reducer connected to its output shaft. The transmission mechanism 148 is a known one using a sprocket and a chain. However, both may be other devices. Each arm 150 is connected at one end to the corresponding eccentric part. Each link 152 is also connected to the partition wall 114 at one end.

As shown in FIG. 9, the crankshaft 146 is
It extends above the second chamber 136 in the left-right direction, and is supported by the partition wall 114 at both ends of the main body of the crankshaft by the bearing 154 and the case 156. Each arm 150 is supported by the bearing 158 and the case 60 on the corresponding eccentric portion of the crankshaft. Case 15
A mechanical seal 162 is arranged between the parts 6, 160. A cap 164 is attached to the case 160. Various sealing materials are arranged in the cases 156 and 160, and lubricating oil is filled in the cases 156 and 160.

The cutter assembly 118 includes the shield body 11
2 is arranged at the front end portion of the arm 150, and is connected to the tip portion of the arm 150 at the lower portion and to the tip portion of the link 152 at the upper portion so as to be angularly rotatable about an axis extending in the second direction. . As shown in FIG. 2, a link 152 to the cutter assembly 118 in the vertical direction.
Is above the shield body 112 and the link 152 to the partition wall 114.

The cutter assembly 118 is composed of a plurality of saw-tooth-shaped cutters 166 extending in the vertical direction at intervals in the horizontal direction.
And a plurality of plate-shaped connecting bodies 168 that extend in the left-right direction at intervals in the vertical direction and connect adjacent cutters 166 to each other.

Each cutter 166 has its bit or cutting edge 170 oriented forward and upward, ie diagonally upward, so as to excavate the face when it is moved in said first direction. Each plate-shaped cutter, that is, each connected body 168
Defines an inlet for earth and sand in cooperation with an adjacent cutter 166. The cutters 166 are arranged at a pitch P equal to or less than the eccentric amount e of the eccentric portion of the crankshaft 146.

Each connecting body 168 is fixed to the adjacent cutters 166 so as to be horizontal. Each connecting body 168
Is a plate-shaped cutter in the illustrated example, and therefore has a bit, that is, a cutting edge 72, that extends continuously in the left-right direction at the front end edge of the main body. The cutting edge 72 of each connecting body 168 is directed forward and upward, that is, obliquely upward.

A crusher body 174 is arranged between the partition wall 114 and the cutter assembly 118. The crusher body 174 extends from the rear of the cutter assembly 118 to a position between adjacent saw-teeth cutters 166, and is immovably connected to the arm 150 and the saw-teeth cutter 166. The crusher body 174 is a bit that extends continuously in the left-right direction and is directed forward, that is, the cutting edge 1.
76 at the front edge.

In the excavator 110, when the crankshaft 146 is rotated by the drive source 144, the crankshaft 146 is rotated.
The eccentric portion of the arm 150 is swung around the axis of the crankshaft 146 in the direction of the arrow in FIG.
The cutter assembly 118 is reciprocated in the vertical direction in cooperation with 52.

Therefore, when the drive source 144 is driven while the excavator 110 receives the forward force, the cutter assembly 11
8 is reciprocally moved in the vertical direction over the range of the arrangement pitch P of the saw-toothed cutters 166 or more, the excavator 11
Due to the zero forward and the reciprocating movement of the cutter assembly 118, each serrated cutter 166 acts like a saw to excavate a face, and each connector 168 and crusher body 174 includes a plow or scoop. To excavate the face.

As a result, a plurality of grooves extending in the vertical direction are formed in the face by the sawtooth-shaped cutter 166.
The cutting face is divided into a plurality of blocks by a saw-toothed cutter 166. In addition, each divided block is a connected body 1.
68 and crusher body 174 further subdivides into blocks. The subdivided blocks are sawtooth-shaped cutters 166 as the excavator 110 advances.
And is received in the first chamber 134 from the inlet defined by the connector 168.

The excavated earth and sand fill the inside of the first chamber 134, and the earth and sand in the first chamber 134 are between the first main body 120 and the crusher main body 174 or between the partition wall 12 and the crusher main body 174. After passing through the second through the lattice 132
The room 136 is accepted. The earth and sand in the second chamber 136 is discharged from the second chamber 136 to the outside of the excavator 110 by the pipe 140 together with the muddy water supplied to the second chamber 136 by the pipe 138. The pressure in the front region 128 is
It is measured by a pressure gauge 178 and is maintained at a predetermined value to prevent the face from collapsing.

The large gravel contained in the subdivided block is composed of the first main body 120 and the crusher main body 174.
When passing between the partition wall 114 and the crusher main body 174, the crusher main body 174 causes the first main body portion 120 to move as the crusher main body 174 reciprocates.
Alternatively, the lattice 132 is pressed by the partition wall 114.
It is crushed to a size that allows it to pass through. The drive source 144 may be occasionally reversed to enhance the crushing effect between the crusher body 174 and the first body portion 120.

Arrangement Pitch P of Sawtooth Cutters 166
Is less than or equal to the eccentric amount e of the eccentric portion of the crankshaft 146, preferably e = P to 3P, and more preferably e = P to 1.5P.

When the arrangement pitch P of the saw-toothed cutters 166 is larger than e, the movement loci of the adjacent sawtooth-shaped cutters 166 are not continuous, so that it is impossible to form a groove continuous in the first direction on the face. On the other hand, if the arrangement pitch P of the sawtooth-shaped cutters 166 is too small, the sawtooth-shaped cutters 166 become small.
The mechanical strength of 66 is reduced.

The size of the cutting edge 172 in the left-right direction is preferably slightly larger than the thickness of the main body of the saw-toothed cutter 166. As a result, the reciprocating movement of the saw-toothed cutter 166 becomes smooth.

In the case of using a plurality of short pipes, a new pipe is arranged between the rearmost pipe and the original pushing device each time the excavator 110 and the pipe following the excavator 110 are advanced by a predetermined distance. After that, the step of advancing the excavator and the pipe while excavating the face with the excavator again is repeated.

The above steps are repeated until the laying of the pipe between the adjacent vertical shafts is completed. As a result, the plurality of pipes are pushed into the excavation mark of the excavator. When the above steps are completed, the same steps are repeated to lay a new pipe row next to the laid pipe row.

According to the excavator 110, the cutting face has a saw-toothed cutter 166, the connecting body 168, and the crusher body 17.
Since the excavation is performed so as to be divided into a plurality of blocks by 4, the excavation efficiency is higher than any of the conventional excavators. Moreover, since the saw-toothed cutter 166 moves within the excavation groove formed by itself, it is not necessary to increase the driving force for the cutter.

Like the excavator 110, the cutter assembly 11
When 8 is reciprocally moved by the rotational movement of the crankshaft 146, the number of reciprocating movements of the cutter per unit time can be increased and excavation can be performed more efficiently than when a jack such as a piston / cylinder mechanism is used. be able to. Further, since the cutter assembly 118 makes an eccentric motion such that the blade edge of each cutter draws a circular locus around an axis extending in the horizontal direction orthogonal to the axis of the shield body 112, the saw-teeth-shaped cutter 166 and the coupling are formed. The body 168 moves so as to enter the inside of the face, and the biting of the saw-like cutter 166 and the connecting body 168 into the face is ensured.

The upper end of the cutter assembly 118 is linked to the link 15
Instead of pivotally connecting to the shield body 112 or the partition wall 114 by 2, the reciprocating movement of the cutter assembly 118 may be restricted by a guide or the like.

However, the upper end of the cutter assembly 118 is connected to the shield body 112 or the partition wall 114 by the link 152.
When pivotally connected to, compared to when using a guide, etc.
The drive mechanism 116 is simplified. Further, since it is possible to cause each cutter to make a motion in which the blade tip of each cutter reciprocates in the first direction while moving in the front-rear direction, it is possible to enhance excavation efficiency.

In particular, the cutter assembly 11 in the vertical direction
The position of the connection point of the link 152 to the No. 8 is preferably displaced downward from the partition wall 114 and further to the connection point of the link 152 to the shield body 112. If such a drive mechanism is used, the connecting point of the link 152 to the cutter assembly 118 is displaced as shown by a double-headed arc-shaped arrow in FIG. 2 together with the rotational movement due to the rotation of the crank shaft 146. It is possible to reliably move each cutter with a simple mechanism so that at least the blade edge of each cutter is displaced upward while being displaced forward and displaced downward while being displaced rearward.

When the saw-toothed cutter 166 excavates a face, a reaction force acts on the shield body 112. Since the reaction force at this time is a force that pushes down the shield body 112, there is little possibility that the forward direction of the excavator 110 is changed by the reaction force.

As the shield type tunnel excavator used in the pipe roof construction method of the present invention, other than those described above, for example, the one described in JP-A-4-357298 may be used.

[Brief description of drawings]

FIG. 1 is a view showing a cross section and a laid state of a first embodiment of a pipe of the present invention.

FIG. 2 is a diagram showing a cross section and a laid state of a second embodiment of the pipe of the present invention.

FIG. 3 is a view showing a cross section and a laid state of a third embodiment of the pipe of the present invention.

FIG. 4 is a view showing a cross section and a laid state of a fourth embodiment of the pipe of the present invention.

FIG. 5 is a view showing a cross section and a laid state of a pipe according to a fifth embodiment of the present invention.

FIG. 6 is a view showing a cross section and a laid state of a sixth embodiment of the pipe of the present invention.

FIG. 7 is a view showing another embodiment of the engaging means used in the pipe of the present invention.

FIG. 8 is a front view showing an embodiment of the shield excavator of the present invention.

9 is a sectional view taken along line 1-1 in FIG.

10 is a sectional view taken along line 2-2 in FIG.

FIG. 11 is a sectional view taken along line 3-3 in the figure.

FIG. 12 is a cross-sectional view showing an embodiment near the end of the crankshaft.

[Explanation of symbols]

10, 24, 26, 30, 34, 42 Pipes 10a, 24a, 26a, 30a, 34a, 42a 1
26 Pipe 12 Main Body 12a, 50a, 60a, 70a, 80a Edge (First
14, 54, 64, 74, 84 Gap 16, 32, 50, 60, 70, 80 First member 18, 52, 62, 72, 82 Second member 18a, 52a, 62a, 72a , 82a 1st part 18b, 52b, 62b, 72b, 82b 2nd part (2nd engaging means) 20, 22, 34, 36, 56, 66, 76, 86 space 110 shield type tunnel excavator.

Claims (9)

[Claims] 1. A tubular main body, first engaging means provided on the main body, and second engaging means provided on the main body, which are of the same kind and are arranged adjacent to each other. A pipe including a first engaging means of the pipe and a second engaging means capable of engaging, wherein the main body portion has an outer shape of a substantially quadrangular cross section formed by a plurality of surface portions. 2. A pair of first edge portions that directly or indirectly form a continuous gap in the main body portion from one end portion to the other end portion in the longitudinal direction of the main body portion. And the second engaging means engages with the first edge of the pipe arranged next to the second edge extending outside the main body in the longitudinal direction of the main body. The pipe of claim 1 having a possible second edge. 3. A first member which is disposed inside the main body portion and extends in the longitudinal direction of the main body portion, wherein a space communicating with the outside of the main body portion through the gap is formed in the main body portion. A second member that is formed on the inner side of the main body portion in cooperation with the first main body portion and the second engaging means is disposed on the outer side of the main body portion and extends in the longitudinal direction of the main body portion. Including a second member having the second edge, the second member
The member is an elongated plate-shaped first portion having a thickness dimension smaller than the width dimension of the gap, and the first portion fixed to the outer surface of the main body portion at one end edge in the width direction, A second portion continuing from the other end edge of the first portion in the width direction, having a cross-sectional shape larger than the width dimension of the gap and smaller than the space, and defining the second edge portion; The pipe according to claim 2, comprising: 4. The first engaging means is at least one first member fixed to the outside of the main body portion and extending in the longitudinal direction of the main body portion, and having the first edge portion. The main body part includes at least one first member that forms a space, which is communicated with the outside through the gap, outside the main body part, and the second engaging means is arranged outside the main body part. At least one second extending longitudinally of the
The second member is an elongated plate-shaped first portion having a thickness dimension smaller than the width dimension of the gap, and is fixed to the outside of the main body portion at one end edge in the width direction. A first portion and a second portion continuing to the other widthwise end edge of the first portion and having a cross-sectional shape larger than the width dimension of the gap and smaller than the space; A pipe according to claim 1, comprising a defining second portion. 5. The third member, wherein the first member extends continuously from one end to the other end in the longitudinal direction of the main body, and is fixed to the main body in a liquid-tight manner. The pipe described in. 6. The second member according to claim 5, wherein the second member extends continuously from one end to the other end in the longitudinal direction of the main body and is liquid-tightly fixed to the main body. Pipe. 7. The first engaging means is formed on one surface portion of the surface portions, and the second engaging means is formed on another surface portion of the surface portions. The pipe according to any one of claims 1 to 6, which is formed. 8. A tubular main body having an outer shape of a substantially quadrangular cross section formed by a plurality of surface portions, a first engaging means provided on the main body, and a main body provided on the main body. A pipe roof construction method using a pipe which is a second engaging means and is provided with a first engaging means of a pipe of the same kind arranged adjacently and a second engaging means which can be engaged, A pipe roof construction method comprising arranging the pipe in an excavation mark by the excavator while excavating the ground with a shield tunnel excavator having substantially the same outer shape as the main body. 9. The pipe according to claim 8, wherein the pipe is arranged at the excavation track while the excavator is moved forward by pushing the pipe into the excavation track by an extruding device arranged behind the pipe. Method.