JP2631091B2 - Pipe and pipe roof method using the same - Google Patents

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, a waterproof body, and a pipe roof construction method using the same.

[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, a waterproof body, and the like, a plurality of pillars having a cylindrical main body, that is, pipes, are generally used. Each pipe is laid almost horizontally by a pipe propulsion method using an excavator arranged at a front end and a main pushing device arranged rearward.

[0003] As one of pipes used in this type of construction method, a cylindrical main body having a pair of edges forming a continuous gap from one end to the other end in the longitudinal direction, and fixed inside the main body. A partition extending continuously from one end to the other end in the longitudinal direction of the main body, and a space communicated with the outside of the main body through the gap in cooperation with both edges of the main body. And an engaging portion fixed to the outside of the main body portion and extending in the longitudinal direction of the main body portion, the engaging portion being received in the gap and space of the same type of pipe arranged next to the main body portion. (Japanese Utility Model Laid-Open No. 4-17491 and Japanese Patent Laid-Open No. 4-38397).

At the time of laying, each pipe is advanced with an excavator by a main pushing device arranged in a starting shaft while the engaging portion is received in a gap and a space of the same type of laid pipe. , Is pushed into the excavation site by the excavator. This operation is repeated until a plurality of pipe rows extending from the starting shaft to the reaching shaft are laid.

However, in the conventional pipe roof construction method, even if the pipe is laid using a shield type tunnel excavator whose forward direction can be corrected, it is not possible to prevent the excavator and the pipe from moving forward while meandering. Therefore, a laying error occurs, and as a result, the interval between adjacent pipe rows differs for each portion in the longitudinal direction of the pipe row, and also differs for each adjacent pipe row.

For this reason, for example, the first pipes of two first pipe rows laid at an interval are connected to a plurality of second pipes.
Pipes of the second row of pipes is connected to one another by a second pipe of the second row of pipes, i.e., closed by two or more second rows of pipes. When the pipes are sequentially laid from the side of the row, the interval between the other first pipe row and the lastly laid second pipe row becomes large for each portion in the longitudinal direction of the pipe row due to the accumulation of the laying error of each pipe. It is different and greatly different from the expected value, so that it is difficult to connect the pipes of the other first pipe row with the pipes of the second pipe row that is laid last.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to reliably connect adjacent pipe rows.

[0008]

A pipe according to the present invention has a cylindrical main body having a pair of edges forming a continuous gap from one end to the other end in a longitudinal direction, and one surface facing the gap. A plate-shaped reinforcing portion fixed to the inside of the main portion at both ends in the width direction, and a space communicated outside the main portion through the gap with both edges of the main portion and the reinforcing portion. A pair of plate-shaped partitioning portions formed together inside the main body, each being fixed to the inner surface of the main body at one end in the width direction, and the reinforcing portion at the other end in the width direction. A pair of partitioning portions fixed to the one surface, and an engaging portion fixed to the outside of the main body portion, which is received in the gap and the space of the same type of pipe arranged next to the same type of the same type. The engagement portion engageable with the edge of the pipe.

While excavating the ground with an excavator, the pipe is advanced together with the excavator by a main pushing device or the like, so that the pipe is pushed into the excavation site of the excavator and laid on the excavation site. Adjacent pipe rows place the elongated plate-shaped connecting member underground in a state in which one side and the other side in the width direction of the connecting row are received in the space formed by the pipe sections of the adjacent pipe rows. By arranging, they are interconnected.

The above-described reinforcing portion and the two partition portions prevent the main portion from being deformed by compression even when a compressive force acts on the main portion. Therefore, even in the case of a pipe having a main body having a continuous gap from one end to the other end in the longitudinal direction, the distance from the edge of the main body to the reinforcing portion can be increased, and the connecting member can be connected to the pipe. The range that can be received in the space formed by the partitioning portions and the like becomes large.

[0011] Therefore, in order to connect the two first pipe rows laid at intervals by a plurality of second pipe rows, the second pipe rows are sequentially arranged from the adjacent one of the first pipe rows. When laying, the pipe of the present invention is used at least as the pipe of the second pipe row to be laid last, and by using a wide member as the connecting member, it is laid last with the other first pipe row. Even if the distance between the second pipe row and the second pipe row is greatly different from a predetermined value at each portion in the longitudinal direction of the pipe row, the other first pipe row and the lastly laid second pipe row are separated. It can be connected by a connecting member.

As described above, according to the pipe of the present invention,
Since the distance from the edge of the main body portion to the reinforcing portion can be increased, even if the interval between adjacent pipe rows to be connected is greatly different for each part in the longitudinal direction of the pipe row and greatly different from a planned value, Both pipe rows can be reliably connected.

It is preferable that the reinforcing portion, the two partition portions, and the engaging portion extend continuously from one end to the other end in the longitudinal direction of the main body. Thereby, the movement of the connecting member with respect to the member forming the space and the movement of the engaging portion with respect to the partition member or the like forming the space of another pipe become smooth.

The engaging portion includes an elongated first plate-shaped member and an elongated second plate that is continuous with one edge in the width direction of the first plate-shaped member and is substantially perpendicular to the first plate-shaped member. It may have a T-shaped or L-shaped cross-sectional shape with the plate-like body, and may be fixed to the outer surface of the main body at the other end edge of the first plate-like body.

According to the pipe roof method of the present invention, there is provided a tubular main body having a pair of edges forming a continuous gap from one end to the other end in the longitudinal direction, and a cylindrical main body fixed inside the main body. A partition that extends continuously from one end to the other end in the longitudinal direction, and that forms a space communicated with the outside of the main body through the gap inside the main body in cooperation with both edges of the main body. And laying a first pipe under the ground, before, simultaneously with or after this, connecting the second pipe of claim 1 to the first and second pipes. The first and second pipes are laid next to the first pipe in a state where the gaps face each other, and the rear and elongated plate-shaped connecting members are connected to the first and second pipes at one side and the other side in the width direction thereof. Includes placing underground in a space-accepted state.

According to the pipe roof construction method of the present invention, since a pipe capable of increasing the distance from the edge of the main part to the reinforcing part is used, the interval between adjacent pipe rows to be connected is in the longitudinal direction of the pipe row. Both pipe rows can be reliably connected even if they greatly differ from part to part and greatly differ from expected values.

[0017] It is preferable that the connecting member has a contact portion capable of contacting the inside of the edge portion of the first and second pipes on one side and the other side in the width direction, respectively. Thereby, both pipe rows and the connecting member are securely connected.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, a column or pipe 10 includes a cylindrical main body 12 having a substantially circular cross-sectional shape. The main body 12 has a pair of edges 1 forming a continuous gap 14 from one end to the other end in the longitudinal direction.
2a.

Inside the main body 12, a pair of elongated plate-shaped first members or reinforcing members 16, a pair of elongated plate-shaped second members or partition members 18, and a pair of elongated plate-shaped auxiliary members are provided. The member 20 is disposed. A third member, that is, an engagement member 22 is disposed outside the main body 12. The reinforcing member 16, the partition member 18, the auxiliary member 20, and the engaging member 22 extend continuously from one end of the main body 12 in the longitudinal direction to the other end.

The two reinforcing members 16 are arranged so as to face each other with the axis of the main body part therebetween, and the main body parts are provided at both ends in the width direction such that one surface of one reinforcing member 16 faces the gap 14. 12 is continuously and liquid-tightly fixed to the inner side surface over the entire length range by welding or the like. Instead of using a pair of reinforcing members 16, only one reinforcing member 16, especially the reinforcing member 16 on the side of the gap 14, may be used, or three or more reinforcing members may be used.

The partition member 18 is disposed so as to face the gap 14 with the gap 14 interposed therebetween. The partition member 18 is continuously liquid-tight at one end edge in the width direction to the inner surface of the main body 12 by welding or the like over the entire length range. And is continuously and liquid-tightly fixed to the surface of the reinforcing member 16 on the side of the gap 14 at the other end edge in the width direction by welding or the like over the entire length range.

The auxiliary member 20 is disposed on the side opposite to the partition member 18 with respect to the reinforcing member 16, and is continuously connected to the inner surface of the main body 12 at one end in the width direction by welding or the like over the entire length range. It is tightly fixed, and is fixed to the other surface of the other reinforcing member 16 at the other edge in the width direction by welding or the like. The auxiliary member 20 need not be provided.

The two edges 12a, the one reinforcing member 16 and the two partitioning members 18 cooperate with each other to form a space 24 communicated with the outside of the main body 12 through the gap 14 inside the main body 12. . The space 24 is liquid-tightly partitioned from the remaining space of the internal space of the main body 12 by the reinforcing members 16 and the partitioning members 18.

The engagement member 22 is a first elongated plate-like body 22.
a, the first plate-like body continues at one end in the width direction and
Elongate second plate-like body 2 substantially perpendicular to the plate-like body 22a
2b has a T-shaped cross section. Engaging member 22
Is continuously and liquid-tightly fixed to the outer surface of the main body 12 at the other end of the first plate-shaped body 22a by welding or the like over the entire length range.

Prior to laying the pipe 10, the pipe 10
A row of pipes using larger pipes 30 is laid at intervals and then a plurality of pipe rows using pipes 40 of approximately the same size as pipe 10 used pipes 30 (right side in FIG. 1). Are sequentially laid from the side of the pipe row, and then a pipe row using the pipes 10 is laid next to the lastly laid pipe row using the pipes 40.

Each pipe is disposed at the rear end of a shield type tunnel excavator having a cross-sectional area substantially equal to the cross-sectional area of the main body, and is then ground by a main pushing device disposed in a starting shaft. Is excavated by an excavator while being advanced together with the excavator from the starting shaft to the reaching shaft, thereby being pushed into the excavation site of the excavator.

The length of each pipe is generally less than the distance between the starting shaft and the reaching shaft. Therefore, each time the operation of pushing one pipe into the excavation site by a distance corresponding to its length is completed, that is, each time the propulsion of one pipe is completed, a new pipe of the same type is placed at the end of the pipe being laid. The operation of connecting the sections is repeated for each pipe row.

Each pipe 30 has a cylindrical main body 32 having a substantially circular cross-sectional shape in which a gap 34 is formed by a pair of edges 32a, and a partition member 3 disposed in the main body 32.
8 is included. The partition member 38 is provided between the main body 32 and the gap 34.
A space 36 communicated with the outside of the main body portion 32 through (see FIG. 2) is formed inside the main body portion 32 in cooperation with the edge portion 32a. The gap 34, the space 36, and the partition member 38 are continuous from one end to the other end in the longitudinal direction of the main body 32. The partition member 38 also functions as a reinforcing member.

Each pipe 40 has a cylindrical main body 42 having a substantially circular cross-sectional shape, and a space 46 communicated with the outside of the main body 42 through a gap 44 (see FIG. 2) between the main bodies 42.
Is formed inside the main body 42 in cooperation with the edge 32a, and an engaging member 50 arranged outside the main body 42. The gap 44, the space 46, the partition member 48, and the engagement member 50 are continuous from one end to the other end in the longitudinal direction of the main body 42. The partition member 48 also functions as a reinforcing member.

The partition members 38 and 48 have a U-shaped cross section in the illustrated example, but may have another cross section such as a C shape. The partition members 38 and 48 are continuously and liquid-tightly fixed to the inner side surfaces of the edges 32a and 42a of the corresponding main portions 32 and 42 at both ends in the width direction by welding or the like over the entire length range. . For this reason, the spaces 36 and 46 are liquid-tightly partitioned from the remaining spaces in the internal spaces of the corresponding main bodies 32 and 42.

The engaging member 50 is, like the engaging member 22,
It has a T-shaped cross-sectional shape due to the elongated first and second plate-like bodies, and has a full length range by welding or the like to the outer surface of the main body 42 at the widthwise edge of the first plate-like body. And liquid-tight.

When the first row of pipes is laid by the pipes 40, the pipes 40 are excavated by an excavator with the T-shaped portion of the engagement member 50 received in the gaps 34 and spaces 36 of the pipes 30. Pushed into the trace. In contrast, when laying subsequent pipe rows,
Or 10 is the gap 44 between the pipes 40 of the pipe row in which the T-shaped part of the engaging member 50 or 22 was previously laid.
And into the space 46 received by the excavator.

Thus, each pipe 40 to be newly laid is
Or, while the pipe 10 is advanced, the member forming the space of the pipe of one adjacent pipe row and the engaging member of the pipe of the other adjacent pipe row follow the pipe that is being laid along the pipe that has been laid. Act as a guide to guide you.

The thickness of the first plate-like body of the engaging members 22 and 50 is smaller than the width of the gaps 14, 34, 44. The width dimension of the second plate-shaped body of the engaging members 22 and 50 is larger than the width dimension of the gaps 14, 34, 44, and
It is smaller than the width dimension of 4,36,46. For this reason, in a state where the engaging members of the pipes of one adjacent pipe row are received in the space of the pipes of the other adjacent pipe row, the force for separating the pipes of the adjacent pipe row applies to the pipes of the adjacent pipe row. When operated, the second plate-like body of the engaging member abuts on the inner side surface of the edge of the pipe of the adjacent pipe row, and prevents the pipes of the adjacent pipe row from being separated.

Usually, one pipe 30, 40 or 10
Each time the propulsion is completed, a new pipe of the same type connected to the last part of the pipe being laid is connected such that the main parts, the partition members, and the engagement members respectively match.

The gap between the pipe 10 and the pipe 40
Pipe 30 (left side in FIG. 1)
Is laid so as to be substantially opposed to the gap 34. afterwards,
The pipe 30 and the pipe 10 are connected by an elongated plate-shaped connecting member 52.

The connecting member 52 has a so-called I-shaped cross-sectional shape having locking portions 54 perpendicular to the plate-shaped portion 54 at both edges in the width direction of the plate-shaped portion 54. The thickness of the plate portion 54 is
The width is slightly smaller than the width of the gaps 14 and 34 between the pipes 10 and 30. The width dimension of the locking portion 56 is larger than the width dimension of the gaps 14 and 34 between the pipes 10 and 30, and is slightly smaller than the width dimension of the spaces 24 and 36.

The connecting member 52 is configured such that the locking portion 56
In the state received by 36, it is pushed into the ground by a main pushing device or the like. Thereby, the locking portion 5 of the connecting member 52
6 is received in the spaces 24, 36 of the pipes 10, 30, and the force for separating the pipes 10, 30 is applied to the pipes 10, 3.
0, the locking portion 56 of the connecting member 52
The pipes 10 and 30 are prevented from being separated from each other by abutting the inner surfaces of the edges 12a and 42a of the pipes 0 and 30.

The length of the connecting member 52 is also usually shorter than the distance between the starting shaft and the reaching shaft. Therefore, each time the operation of pushing one connecting member 52 by a distance corresponding to its length is completed, the operation of connecting a new connecting member 52 of the same type to the last portion of the connecting member 52 in the middle of laying is performed. The connecting members 52 that are adjacent in the length direction are joined in a state where the plate-like portions 54 and the locking portions 56 abut against each other.

As a shield type tunnel excavator, for example, Japanese Unexamined Patent Publication No. Sho 61-10299 (Japanese Patent Publication No. 4-5120)
JP-A-63-189596 (Japanese Patent Publication No. 4-6)
9719), JP-A-3-59295, JP-A-5-25998, JP-A-5-26671, etc., as described in JP-A-5-26671, a shield body and a cutter assembly for excavating the ground. A known excavator having a driving mechanism for rotating the cutter assembly, a discharging means for discharging excavated matter, and a direction correcting mechanism for correcting the excavation direction, in particular, a cutter assembly driven by a driving source. Equipped mechanical excavator can be used. However, other excavators may be used.

As the main pushing device, for example, Japanese Utility Model Laid-Open No.
As described in JP-A-80594 (Japanese Utility Model Publication No. 1-37038), JP-A-60-219395, etc., a plurality of hydraulic jacks having a pit wall of a starting shaft as a reaction force body are included. A known device can be used. However, other main pushing devices may be used.

When manufacturing a pipe, laying a pipe 10, etc.
Before actually laying the pipes, it is preferable to arrange a water-sealing sealing material such as styrene foam, foam rubber, sponge, or the like in the spaces 24, 36, 46. Thus, when the pipe is laid or after the pipe is laid, the spaces 24, 3
6, 46 can be prevented from acting as a fluid flow path such as groundwater, muddy water used in an excavator, and the excavated material or the surrounding earth and sand can be prevented from flowing together with the fluid to the side of the shaft. Can be. The engaging members or engaging portions received in the spaces 24, 36, 46 are advanced while being cut by the sealing material.

By sequentially laying a plurality of pipe rows as described above, square, circular, semicircular, U-shaped, U-shaped, V-shaped, inverted U-shaped, inverted V-shaped, gate-shaped, etc. An underground structure having a cross-sectional shape of is constructed. For this reason, according to the cross-sectional shape of the underground structure to be constructed, the angle between the gap and the engaging member around the axis of the main body portion is, as shown in FIGS. Other pipes are used.

Instead of using the engaging member 22 having a T-shaped cross section, a pair of engaging members 62 having an L-shaped cross section may be used as in a pipe 60 shown in FIG. Each engagement member 62 includes an elongated first plate-like body 62a,
At the one end in the width direction, there is an elongated second plate 62b that follows the first end of the first plate 62a in the width direction and is substantially perpendicular to the first plate 62a. Both engaging members 62
The main body 12 is formed at the other end in the width direction of the first plate-shaped body 62a so that the second plate-shaped body 62b projects in the opposite direction.
Is continuously and liquid-tightly fixed to the outer surface over the entire length range by welding or the like.

Pipe row using pipe 10 and pipe 30
The pipe 10 may be used in place of all or some of the pipes 40 laid between the pipe rows using. Further, instead of the pipe 30, a pipe 10 or 40 may be used.

Instead of the pipe 40, a flat plate-like partition member 78 is used as in a columnar body shown in FIG. 3, that is, a pipe 70, and a space 76 for receiving the engaging member is cooperated with the main body 72 and the partition member 78. May be formed. The partition member 78 has a main portion 72 at both edges in the width direction.
Is fixed in a liquid-tight manner continuously over the entire length range by welding or the like on the inner side surface of the base. The space 76 communicates with the outside via a gap 74 between both edges 72a. The partition member 78
It also acts as a reinforcing member.

The present invention can be applied not only to a pipe having a circular cross section and a pipe roof method using the same, but also to a pipe having a polygonal cross section and a pipe roof method using the same. The present invention can be applied not only to steel pipes and pipe roof construction methods using the same, but also to reinforced concrete, steel and concrete, steel and reinforced concrete pipes, and pipe roof construction methods using the same. .

The column or pipe 80 shown in FIG.
It includes a square cylindrical main body 82 having an outer shape composed of four surface portions corresponding to each side of the square. The main portion 82 has a pair of edges 82a that form a gap 84 that is continuous from one end to the other end in the longitudinal direction on one surface portion.

Inside the main body 82, an elongated flat reinforcing member 86 and a pair of elongated flat partition members 88 extending in the longitudinal direction of the main body are provided with the reinforcing member 16 of the pipe 10 shown in FIGS. Similarly to the partition member 18, it is liquid-tightly fixed by welding or the like over the entire length range. An engaging member 22 having a T-shaped cross section is provided outside the main body 82 in the pipe 10 shown in FIGS.
As in the case of the engaging member 22 of FIG. The space 24 for receiving the connecting member 52 is formed by the edge 82a, the reinforcing member 86, and the partition member 88.

When the square pipe 80 shown in FIG. 4 is used, the pipe connected to the pipe 80 by the connecting member 52 may be a pipe 30 having a circular cross section as shown in FIGS. Like the pipe 80, it may be a square pipe. Similarly, the pipes of the pipe row laid before the pipe row is laid by the pipes 80 may be pipes having a circular cross section as shown in FIGS.
A rectangular pipe 90 similar to that shown in FIG. 4 may be used.

As shown in FIG. 4, a part of the pipe 90 includes a square tube-shaped main body 92. The main portion 92 has a pair of edges 92a that form a gap 94 that is continuous from one end to the other end in the longitudinal direction in one surface portion. Main part 9
Inside the 2, an elongated flat plate-shaped partition member 98 extending in the longitudinal direction of the main body portion is liquid-tightly fixed by welding or the like over the entire length range at both end edges. Partition member 9
8 also acts as a reinforcing member.

Although not shown, the pipe 90 is the same as that shown in FIG.
And an engagement member similar to the engagement member 22 of the pipe 10 shown in FIG. This engaging portion is liquid-tightly fixed by welding or the like over the entire length range outside the main portion 92, similarly to the engaging member 22 of the pipe 10 shown in FIGS. Space 96 for receiving the engaging member of the adjacent pipe
Is formed by the edge 92a and the partition member 98.

As an excavator used for a square pipe, for example, JP-A-4-237796, JP-A-4-35
No. 7298, a shield-type excavator,
A shield body such as a shield type excavator proposed in Japanese Patent Application No. 4-293948, a cutter assembly for excavating the ground, a drive mechanism for rotating the cutter assembly,
An excavator equipped with a direction correcting mechanism for correcting the excavation direction can be used.

As in the above embodiments, if the partition member and the engaging member are fixed in a liquid-tight manner over the entire length of the main body, groundwater and the like can be removed in a state where those pipes are laid underground. This is preferable because it can be prevented from passing between adjacent pipes. However, depending on the ground, it may not be necessary to use a pipe in which the partition member and the engagement member are fixed in a liquid-tight manner over the entire length range of the main body. In such a case, the partition member and the engagement member may be fixed to the main body at a plurality of locations in the longitudinal direction, respectively.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a pipe roof construction method using a pipe of the present invention.

FIG. 2 is an enlarged view showing one embodiment of a partition member and an engagement member of the pipe of FIG.

FIG. 3 is a sectional view showing another embodiment of the pipe of the present invention.

FIG. 4 is a sectional view showing still another embodiment of the pipe of the present invention.

[Explanation of symbols]

 10, 60, 80 Pipe 12, 82 Main part 14, 84 Gap 16, 86, Reinforcement member (reinforcement part) 18, 88 Partition member (partition) 22, 62 Engagement member (engagement part) 24 Space 12a, 82a Edge 22a, 62a First plate-like portion 22b, 62b Second plate-like portion 30, 40, 70, 90 Pipe 32, 42, 72, 92 Main body 34, 44, 74, 94 Gap 36, 46, 76 96 space 38, 48, 78, 98 partitioning member (partitioning portion) 50 engaging member (engaging portion) 32a, 42a, 72a, 92a edge 52 connecting member 54 plate-like portion of connecting member 56 locking portion of connecting member

Claims (5)

(57) [Claims] 1. A cylindrical main body having a pair of edges forming a continuous gap from one end to the other end in a longitudinal direction, and the main body at both ends in the width direction such that one surface faces the gap. A plate-shaped reinforcing portion fixed to the inside of the main body, a space communicated with the outside of the main body through the gap is provided inside the main body in cooperation with both edges of the main body and the reinforcing portion. A pair of plate-shaped partition portions to be formed, each of which is fixed to the inner surface of the main body portion at one end in the width direction and fixed to the one surface of the reinforcing portion at the other end in the width direction. And an engaging portion fixed to the outside of the main body portion, which can be received in the gap and the space of the same type of pipe arranged next to the edge portion of the same type of pipe. A pipe comprising: 2. The pipe according to claim 1, wherein the reinforcing portion, the two partition portions, and the engaging portion extend continuously from one end to the other end in the longitudinal direction of the main body. 3. An elongate first plate-like body, wherein:
An elongated second plate that follows one end of the first plate in the width direction and is substantially perpendicular to the first plate has a T value.
3. The pipe according to claim 1, wherein the pipe has a letter-shaped or L-shaped cross-sectional shape, and is fixed to an outer surface of the main body at the other end edge of the first plate-shaped body. 4. 4. A cylindrical main body having a pair of edges forming a continuous gap from one end to the other end in the longitudinal direction, and a cylindrical main body fixed inside the main body and extending from one end in the longitudinal direction of the main body to another. A partition section extending continuously to the end, the partition section forming a space communicated with the outside of the main body through the gap inside the main body in cooperation with both edges of the main body. Laying the second pipe of claim 1 in the ground before, simultaneously with or after said first pipe of said first pipe.
And the second pipe is laid next to the first pipe in a state where the gaps face each other, and a rear elongated plate-like connecting member is connected to the first pipe in the width direction by one side and the other side of the first pipe, respectively. And arranging the second pipe underground in a state received in said space. 5. The connecting member has a contact portion capable of contacting the inside of the edge of the first and second pipes on one side and the other side in the width direction, respectively. 5. The pipe roof method according to 5.