JPH09217584A - Pipe joint for pipe roof, watertight packing of shaft, and water cutoff method in pipe roof construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint and the watertight packing of a shaft which are excellent in the property of cutting off water and easy to manufacture and to surely prevent ground water from flowing out to the shaft. SOLUTION: A joint piece 3 provided longitudinally along the outer peripheral surface of a pipe 1 for a pipe roof includes a meshing part 4 of hook-shaped cross section, having a locking groove 4a inside, and a locking part 5 provided opposite to the meshing part 4. When the meshing part 4 of one joint piece 3 is engaged in the locking groove 4a of the other joint piece 3, the back of the meshing part 4 is locked in the locking part 5 of the other joint piece 3, whereby the pair of joint pieces 3 mesh with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe roof construction method for constructing an underground structure by arranging a plurality of pipes in the ground so that their outer peripheral surfaces are adjacent to each other, and is used in this pipe roof construction method. The present invention relates to a pipe roof pipe joint, a vertical shaft water-stop packing, and a water-stop method for the pipe roof method.

[0002]

2. Description of the Related Art Conventionally, a so-called pipe roof construction method has been known as an auxiliary construction method for excavating a tunnel in a ground having a river or an above-ground building or the like, or for excavating a tunnel having a large cross section. This pipe roof construction method
A large number of small-diameter pipes are connected to each other so that their outer peripheral surfaces are adjacent to each other, and are arranged in the ground so as to cover at least the upper part of the tunnel to be excavated, and these pipes are used as underground walls or reinforcements. It is a construction method.

By the way, conventionally, as a joint shape of a pipe used in the pipe roof construction method, one shown in FIG. 28 or 29 is known.

In the example shown in FIG. 28, a male joint piece 102 is provided on one side of the outer peripheral surface of the pipe 101, and a female joint piece 103 is provided on the other side thereof. By engaging the piece 102 and the female joint piece 103 of the other pipe 101, the adjacent pipes 101 are connected to each other. In this case, the male joint piece 10
2 is a combination of two L-shaped steels 104 with their bent portions facing outward, and the female joint piece 103 is the same
The L-shaped steel 104 of the book is assembled with its bent portion facing inward.

On the other hand, in the example shown in FIG. 29 (see Japanese Patent Laid-Open No. 6-280470), the male joint piece 105 is made of T-shaped steel, while the female joint piece 106 partially forms the pipe. It is made of cut C-shaped steel, and the adjacent pipes 101 are connected by engaging the male joint piece 105 and the female joint piece 106.

Further, in Japanese Patent Laid-Open No. 6-280470, in order to prevent the gap portion of the C-shaped female joint piece 106 from acting as water supply, water glass is placed in the female joint piece 106. Disposing a bag enclosing such a curing agent is disclosed.

[0007]

However, FIG.
Alternatively, in the conventional joint shape shown in FIG. 29,
Water-stopping is difficult for the following two reasons. The gap between the male joint piece and the female joint piece is large, and groundwater easily flows out from this gap to the shaft side. In the engaged state of the joint pieces, the ridges of the joints are intricate with each other or have a sharply pointed shape, so that it is extremely difficult to manufacture an entrance packing provided at a portion connected to the vertical shaft.

As a measure for closing the above-mentioned gap, the above-mentioned publication (JP-A-6-280470).
Discloses that a bag containing a hardening agent is placed in a joint piece, but such a bag may be broken when the joint pieces are engaged with each other to penetrate the pipe into the ground. Is high and cannot be a reliable means of preventing groundwater runoff.

The present invention has been made to solve the above-mentioned problems, and provides a pipe roof pipe joint and a vertical shaft watertight packing which are excellent in water-stopping property and easy to manufacture. It is an object of the present invention to provide a water shutoff method capable of reliably preventing groundwater from flowing out into a vertical shaft in a pipe roof construction method.

[0010]

In order to achieve the above-mentioned object, the joint of the pipe for pipe roof according to the present invention is firstly arranged in the longitudinal direction along the outer peripheral surface of the pipe for pipe roof. A pipe roof pipe joint for connecting pipes adjacent to each other by disposing a pair of joint pieces having at least mutually engaging portions having substantially the same shape in opposite directions and engaging the joint pieces with each other. There, the engaging portion of each joint piece includes an engaging portion having a hook-shaped cross section having an engaging groove inside and a retaining portion provided so as to face the engaging portion, and the engaging portion of one joint piece Is engaged with the locking groove of the other joint piece, the back surface of the occlusal portion is locked by the retaining portion of the other joint piece, and the pair of joint pieces are occluded. It is characterized in being configured.

In the invention having the first feature,
The occlusal part of the joint piece provided on one (or the other) pipe is engaged with the locking groove of the joint piece provided on the other (or one) adjacent pipe, and at the same time the back surface of the occlusal part is the other (or one side). ) Is locked to the stopper of the joint piece. As a result, the joint pieces of both are brought into a biting state to connect the adjacent pipes. According to the joint of the present invention, it is possible to reduce the gap between the joint pieces that interlock with each other,
It is possible to make a joint shape having an excellent water-stopping effect.
Further, the ridge lines of the joints do not become intricate with each other when the joint pieces are engaged with each other, and the entrance packing can be easily manufactured. This allows it to be applied to soils with high water pressure. Furthermore, if the overall shape of the joint pieces is made substantially the same, it is sufficient to manufacture only one type of joint piece, so that low-cost and efficient mass production is possible.

In the present invention, it is preferable that the occlusal portion and the retaining portion are integrally formed, but they may be separately formed.

Secondly, the pipe roof pipe joint according to the present invention is provided in the longitudinal direction along the outer peripheral surface of the pipe roof pipe, and the male joint piece and the female joint piece are engaged with each other. A pipe roof pipe joint for connecting adjacent pipes to each other, wherein the male joint piece has a pedestal and an engaging portion protruding from a central portion of the pedestal, and a tip of the engaging portion. Has a wide cross-section, and the female joint piece has a shape having substantially the same width as the pedestal of the male joint piece and having a locking groove for locking the engaging portion of the male joint piece. It is characterized by.

In the invention having the second feature,
The engaging portion of the male joint piece provided on one pipe is engaged with the locking groove of the female joint piece provided on the other adjacent pipe, so that the two joint pieces are in a meshed state. Adjacent pipes are connected to each other. According to the joint of the present invention, it is possible to reduce the gap between the joint pieces that also engage each other,
It is possible to make a joint shape having an excellent water-stopping effect.
Further, the ridge lines of the joints do not become intricate with each other when the joint pieces are engaged with each other, and the entrance packing can be easily manufactured. This allows it to be applied to soils with high water pressure.

In each of the above inventions, it is preferable that the outer surface shape of each joint piece is set so that the ridgeline shape of the joint piece in a state where the joint pieces are in mesh with each other is a smooth curve having a concave central portion. If the outer surface shape of each joint piece is set in such a manner, the manufacturing of the entrance packing becomes easier and the water blocking performance can be further improved.

Next, the vertical water stop packing according to the present invention is designed so that when the pipe roof pipe penetrates from the vertical shaft into the ground, the underground water flows into the vertical shaft from the periphery of the joint connecting adjacent pipes to each other. A watertight packing for a vertical shaft for preventing the above, which is characterized in that it has an outer surface shape portion along a ridgeline of the joint and an outer peripheral surface of the pipe continuous with the ridgeline.

According to the shape of the water blocking packing of the present invention, since the water blocking packing has the outer surface shape portion along the ridge line of the joint and the outer peripheral surface of the pipe continuous with the ridge line, the water blocking packing is adjacent to each other. It is possible to surely stop the water in the portion surrounded by the book pipe and the outer surface of the joint connecting the pipes.

It is preferable that the water blocking packing of the present invention further comprises a dummy packing part having substantially the same shape as the joint piece of the adjacent pipe which engages with the joint piece provided on the outer peripheral surface of the pipe. By providing such a dummy packing portion, water can be reliably stopped around the joint portion until the penetration of the jointed pipe is completed. Further, the dummy packing portion also has a function of guiding the penetrating operation of the pipe.

Next, the water-stopping method in the pipe roof construction method according to the present invention is, firstly, the water-stopping construction method in the pipe roof construction method using the pipe roof pipe having the above-mentioned pipe roof pipe joint, a) after the penetration of the leading conduit, arc-shaped packing mounting step of mounting the arc-shaped packing along the arc-shaped portion of the penetration hole corresponding to the arc-shaped portion excluding the peripheral portion of the joint of the pipe to be penetrated, (b) this circle After the arc-shaped packing attaching step, a joint of an adjacent pipe having an outer surface shape portion along the ridgeline of the joint and the outer peripheral surface of the pipe continuous to the ridgeline and meshing with a joint piece provided on the outer peripheral surface of the pipe A joint packing including a dummy packing having the same shape as the piece is continuously attached to the arc-shaped packing. Yointo part packing attachment process,
(C) A pipe penetrating step of penetrating the pipe with a joint into the penetrating hole after the joint part packing attaching step, and (d) a joint part of the side adjacent to the pipe to be penetrating next after the pipe penetrating step. It is characterized by including a joint packing removing step for removing the packing.

In the water stopping method having the first feature, when the leading conduit is penetrated, along the arcuate portion of the penetration hole corresponding to the arcuate portion of the pipe to be penetrated except for the peripheral portion of the joint. A joint piece of an adjacent pipe to which an arcuate packing is attached, and which then has an outer surface shape portion along the ridgeline of the joint and the outer peripheral surface of the pipe continuous to the ridgeline and which meshes with the joint piece provided on the outer peripheral surface of the pipe The joint part packing including the dummy packing part having the same shape as the above is continuously attached to the arc-shaped packing, the first jointed pipe is penetrated into the penetration hole, and the penetration is performed after the penetration. The joint packing on the side adjacent to the second pipe to be removed is removed. By repeating such a process in sequence, a required number of pipes are continuously penetrated into the ground. In this way, the pipe roof is constructed while reliably preventing the outflow of groundwater to the shaft side where the pipe penetration work is performed.

The water-stopping method in the pipe roof construction method according to the present invention is secondly the water-stopping construction method in the pipe roof construction method using a pipe roof pipe having a joint for the pipe roof pipe described above, wherein After the penetration of the conduit, the arc-shaped packing attaching step of attaching the arc-shaped packing along the arc-shaped portion of the penetration hole corresponding to the arc-shaped portion excluding the joint peripheral portion of the pipe to be penetrated,
(B) After this arcuate packing mounting step, a joint piece provided on the outer peripheral surface of the pipe has an outer surface shape portion along the ridgeline of the joint and the outer peripheral surface of the pipe continuous to the ridgeline, and bites on the joint piece. Joint part packing attachment step of continuously attaching the joint part packing having the dummy packing part having the same shape as the joint piece of the adjacent pipe to be fitted to the arc-shaped packing, (c) after the joint part packing attachment step, with the joint A pipe penetration step of penetrating the pipe into the penetration hole,
(D) After the pipe penetration step, the joint packing removal step of removing the joint packing on the side adjacent to the pipe to be next penetrated, and (e) the joint packing removal step with respect to the adjacent pipe It is characterized by comprising the steps of (a) to (d) repeatedly, and injecting a waterproofing agent between adjacent joint pieces as necessary during this step. Is.

In the water stopping method having the second characteristic, the pipe is penetrated into the ground according to each step of the water stopping method having the first characteristic, and the two adjacent pipes are connected to each other.
After the book pipes have been penetrated, a waterstop is injected between the joint pieces of these adjacent pipes. In this way, even if there are some gaps between the joint pieces, the gaps are completely closed by the water-stopping agent, and more reliable water stop is possible.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Next, concrete embodiments of a joint for pipes for pipe roof, a water blocking packing for a shaft and a water blocking method in a pipe roof method according to the present invention will be described with reference to the drawings.

First, a pipe for a pipe roof according to an embodiment of the present invention will be described with reference to FIGS.

The pipe for the pipe roof of this embodiment (hereinafter,
Simply called a pipe. ) 1 has a shape in which two joint pieces 3 which are slightly shorter in length than the pipe body 2 are welded in the longitudinal direction along the outer peripheral surface of the cylindrical pipe body 2.

The joint piece 3 has an engaging groove 4a on the inner side.
The hook-shaped cross section 4 having a hook shape and the retaining portion 5 provided so as to face the bit section 4 are integrally formed, and a gap 6 is formed on the surface facing the pipe body 2. Thus, it is welded to the pipe body 2 at both side edges along the longitudinal direction. The joint piece 3 is manufactured by hot extrusion molding of SS material. As a result, it is possible to mass-produce at low cost and efficiently, and it is possible to manufacture a product having a high straightness and a highly accurate cross-sectional shape.

Such a joint piece 3 has a predetermined mounting angle (for example, 180 ° or 90 °) on the outer peripheral surface of the pipe body 2 and the opening positions of the engaging grooves 4a are the same in the circumferential direction of the pipe body 2. It is attached so that. Thus, as shown in FIG. 2, the adjacent pipes 1 arranged in parallel with each other are arranged such that the engaging portion 4 of one joint piece 3 is engaged with the locking groove 4a of the other joint piece 3. Will be connected. In the state where the joint pieces 3 are engaged with each other, the back surface of each bite portion 4 is locked to the retaining portion 5 of the other joint piece 3 so that the bite is not disengaged. FIG. 3 (a)
(B) shows the engagement state of the joint pieces 3 when the left and right positions or the vertical positions between the pipe bodies 2 and 2 adjacent to each other are slightly deviated. When the joint piece 3 is configured as described above in this way, even if the positional relationship between the pipe bodies 2 and 2 is slightly displaced, the joint state of the joint pieces 3 can be maintained, and each joint piece 3 can be maintained. It is possible to minimize the gap portion generated between the three.

Further, in the joint piece 3 of this embodiment, the ridge line shape (curve B in FIG. 2B) of the joint in a state where the joint pieces 3 and 3 are engaged with each other has a smooth central portion with a concave shape. The outer surface shape of each joint piece 3 is set so as to form a curved line. By doing so, it is possible to facilitate the production of a water stopper (entrance packing) 15 (specifically, the semi-cylindrical packing 34) of the vertical shaft 11 to be described later, and it is possible to improve the water stoppage.

In order to bury the pipe 1 as described above in the soil, as shown in FIG. 4, first, a vertical shaft 11 for starting a front conduit (tunnel excavator) 10 is formed, and water is poured into it. In a large amount of soil, a chemical agent (water blocking agent) is previously injected into the natural ground 12 around the shaft 11 over a predetermined section. Then, a hole for starting the front conduit 10 is formed on the side wall of the shaft 11, and the front conduit 10 is advanced from the hole along the starting base 14 by the pusher 13 installed in the shaft 11. Intrude into mountain 12. After that, the pipe 1 is fixed to the rear end portion of the front conduit 10, and the rear end surface of the pipe 1 is pressed by the original pushing device 13, so that the pipe 1 continues to penetrate into the natural ground 12 subsequently to the front conduit 10. Let When the pipe 1 is penetrated, the periphery of the penetration hole formed in the side wall of the vertical shaft 11 is stopped by a water stop (detailed later) 15.

Next, the water-stopping method in the pipe roof method for burying the pipe 1 with the joint piece 3 described above in the soil while stopping the water at the entrance of the vertical shaft 11,
The process will be sequentially described with reference to FIGS. 5 to 21.

(1) As shown in FIG. 5, the vertical shaft 1
The sheet pile 20 is attached to the side wall of the sheet No. 1, and a plurality of rectangular base plates 21 are fixed to the surface of the sheet pile 20 by welding at a minute interval from each other.
In order to seal the space formed between 0 and the base plate 21, a water stop plate 22 having a shape (for example, trapezoidal shape) covering the cross section of the sheet pile is fixed to the upper and lower surfaces of the base plate 21 by welding. At this time, the sheet pile 20 and the base plate 2
1, the water blocking plate 22 and the base plate 21, the sheet pile 20 and the water blocking plate 22, and the adjacent portions of the base plate 21 are fixed so as to prevent water leakage.

(2) As shown in FIG. 6, the water stop fitting mounting plate 2 having a hole 23a in the central portion on the surface of the base plate 21 corresponding to the portion where the pipe 1 is buried.
3 is fixed by welding. In this case, the hole 23a has a shape in which a semicircular ear portion is connected to a portion of the pipe 1 corresponding to the joint piece 3 with respect to a circular hole slightly larger than the pipe 1. When welding the waterstop mounting plate 23, only the inner peripheral portion may be welded.

(3) As shown in FIG. 7, the mirrors of the base plate 21 and the sheet pile 20 inside the water stop mounting plate 23 are attached to the holes 2 of the water stop mounting plate 23.
A hole 24 is formed by fusing and removing a portion 23b (a portion indicated by hatching) slightly smaller than 3a. In this way, the ground corresponding to the hole 24 of this fused portion is exposed.

(4) As shown in FIG. 8, the tip conduit (tunnel excavator) 10 is inserted into the holes 24 formed in the base plate 21 and the sheet pile 20. The excavation outer diameter of the leading conduit 10 (the diameter of the penetration hole 25) is slightly smaller than the diameter of the hole 24.

(5) As shown in FIG. 9, after penetrating the cutter head portion 10a, a circle of the penetrating hole 25 corresponding to an arc-shaped portion of the pipe 1 to be penetrated except for the peripheral portion of the joint piece 3 Arc-shaped upper packing 2 along the arc-shaped part
6 and the lower packing 27 are attached with bolts.

(6) As shown in FIG. 10, the portion of the penetration hole 25 corresponding to the joint piece 3 of the pipe 1 to be penetrated, in other words, the penetration hole 25 excluding the mounting portions of the upper and lower packings 26, 27. Attach the side packings (joint packings) 28 and 29 to the parts with bolts. As shown in FIG. 11, the side packings 28 and 29 are composed of a plate 32 whose both ends are supported by pedestals 30 and 31, and a dummy made of an SS material which is welded to the center of the plate 32. A packing part 33 and a pair of rubber-made semi-cylindrical packings 34, 34 fixed to the plate 32 by a rod-shaped fixing part 32b so as to sandwich the dummy packing part 33 are provided. ing. Here, the dummy packing part 33 includes a joint piece 33a having the same shape as the joint piece 3 of the adjacent pipe 1 that engages with the joint piece 3, an arc portion 33b having the same shape as the arc portion of the pipe 1, and the arc portion 33b. And a rubber packing 33c to be fitted inside. Further, the semi-cylindrical packing 34 has an outer surface shape portion along the ridge line of the joint in a state where the joint piece 3 and the joint piece 33a of the dummy packing portion 33 are engaged and the outer peripheral surface of the pipe 1 continuous with the ridge line. doing.

(7) As shown in FIG. 12, the pipe 1 (first piece) with the joint piece 3 is penetrated along the penetration hole 25 of the leading conduit 10. At this time, the inserted pipe 1 advances with the joint piece 3 engaged with the joint piece 33a of the dummy packing portion 33.

(8) As shown in FIG. 13, when the first pipe 1 is completely penetrated, only the side packing 29 on the second pipe 1 side to be inserted next is removed.

(9) As shown in FIG. 14, the water stop fitting plate 35 is fixed by welding to the surface of the base plate 21 corresponding to the portion where the second pipe 1 is embedded. The water stoppage mounting plate 35 is formed by cutting out one side portion of the waterstopper mounting plate 23 for the first pipe described above, and is mounted so as to be adjacent to the water stoppage mounting plate 23. It is not necessary to weld the outer peripheral portion of the water stop fitting plate 35.

(10) As shown in FIG. 15, a part of the water stopper mounting plate 23, the base plate 21 inside the water stopper mounting plates 23 and 35, and the mirror of the sheet pile 20 are attached to the stopper. Hole 35a of water container mounting plate 35
A slightly smaller shaped portion (hatched portion) 35b is removed by fusing to form a hole 36. In this way, the ground corresponding to the hole 36 of this fusing part is exposed.

(11) As shown in FIG. 16, the joint portion (the portion I) between the end face of the water stopper mounting plate 23 and the end face of the base plate 21 at the above-mentioned fusing point is water welded and stopped at the same time. End face of the water container mounting plate 23,
The joint portion (J portion) of the end surface of the water stop fitting plate 35 and the end surface of the base plate 21 is water welded.

(12) As shown in FIG. 17, in the same manner as (4) above, inside the holes 36 formed in the base plate 21 and the sheet pile 20 for the penetration of the second pipe 1. The leading conduit (tunnel excavator) 10 is inserted. In this case, the outer diameter of the excavation of the leading conduit 10 (the diameter of the penetration hole 37) is slightly smaller than the diameter of the hole 36.

(13) As shown in FIG. 18, in the same manner as in (5) above, after penetrating the front conduit 10,
The arc-shaped upper packing 26 and the lower packing 27 are attached by bolts along the arc-shaped portion of the penetration hole 37 corresponding to the arc-shaped portion of the pipe 1 excluding the peripheral portion of the joint piece 3 to be penetrated.

(14) As shown in FIG. 19, side packings (joint packings) 29, 3 are formed in the penetration holes 37 except the mounting parts of the upper and lower packings 26, 27.
Attach 8 with bolts. Of these side packings 29, 38, the side packing 29 located on the side not adjacent to the first pipe 1 (on the right side in FIG. 19) has the same shape as the side packing 29 attached when the first pipe penetrates. Also, the first pipe 1
The side packing 38 adjacent to the side packing 29 has a shape obtained by removing the dummy packing part 33 from the side packing 29.

(15) As shown in FIG. 20, the second pipe 1 is inserted along the penetration hole 37 of the leading conduit 10 in the same manner as in the above (7). At this time, in the pipe 1 to be penetrated, the joint piece 3 on the side adjacent to the first pipe 1 engages with the joint piece 3 of the first pipe 1, and the joint piece 3 on the side not adjacent to the first pipe 1 The joint piece 3 moves forward while being engaged with the joint piece 33a of the dummy packing portion 33.

(16) As shown in FIG. 21, 3
For the pipes 1 and after, the above (8) to (1)
Construction will proceed in sequence according to the procedure shown in 5). In this case, the base plate 21 is added to the surface of the sheet pile 20 by welding as needed. In this manner, the required number of pipes 1 are continuously penetrated into the ground while reliably preventing the groundwater from flowing out to the vertical shaft 11 side, so that the pipe roof is constructed.

In the water stopping method of this embodiment, in order to reliably stop the water in the gaps generated between the engaging surfaces of the joint pieces 3, holes are provided in advance in the required portions of the joint pieces 3 and the adjacent pieces are made adjacent to each other. After the two pipes 1 and 1 are inserted into the soil, they are stopped at the gap between the engagement surfaces of the joint pieces 3 through the gap 6 formed between the pipe body 2 and the joint piece 3. It is preferable to inject a liquid drug. Alternatively, when stopping the water with the water stop device 15, the water stop plate 22
A water blocking agent inlet is provided to fill the space formed by the base plate 21, the water blocking plate 22 and the sheet pile 20 with the water blocking agent, and communicates this space with the holes provided in the required parts of the dummy packing part 33. The water blocking agent may be injected into the gap between the joint pieces 3 or between the engagement surfaces of the joint pieces 3 and the joint piece 33a.

According to the waterproofing method of this embodiment, the side packings 28, 29, and 38, in particular, the ridge line of the joint with the joint piece 3 and the joint piece 33a engaged with each other and the outer circumference of the pipe continuous to the ridge line. By providing the semi-cylindrical packing 34 having an outer surface shaped portion along the surface, it is possible to reliably stop the water in the portion surrounded by the two pipes 1 adjacent to each other and the outer surface of the joint connecting the pipes. be able to. In this case, since the ridge line shape of the joint in a state where the adjacent joint pieces 3 and 3 are engaged with each other is a smooth curve having a concave shape in the central portion, the outer surface shape of the semi-cylindrical packing 34 is made a smooth curve. It is possible to easily manufacture the semi-cylindrical packing 34.

Further, according to the present embodiment, until the penetration of the pipe 1 is completed, the dummy packing portion 33 having the same shape as the joint piece 3 of the adjacent pipe surely stops the water around the joint portion. In addition to this, the dummy packing portion 33 can reliably guide the penetrating operation of the pipe 1.

FIG. 22 shows a modified example of the joint piece of this embodiment in a state before engagement (a) and a state after engagement (b), respectively. In this example, the pair of joint pieces 3A and 3B engaging with each other have slightly different shapes. That is, one joint piece 3
In A, each outer surface shape of the back surface side of the occlusal portion 4A and the retaining portion 5A side is a smooth curve (or a slanting straight line)
On the other hand, in the other joint piece 3B, each of the outer surface shapes is formed as a curved line or a straight line bent at an obtuse angle. Also,
While one joint piece 3A has a gap 6A formed on the side facing the pipe body 2, the other joint piece 3B does not have such a gap. Although the detailed shape is slightly different as described above, the engaging portions including the occlusal portion 4A having a locking groove inside and the retaining portion 5A provided so as to face the occlusal portion 4A have substantially the same shape. There is. As described above, the pair of joint pieces that engage with each other do not necessarily have to have the same shape, and it is possible to use joint pieces that have substantially the same shape or at least the engaging portions have substantially the same shape.

FIG. 23 shows another modification of the joint piece in a state before engagement (a) and a state after engagement (b), respectively. This example is also an example in which a pair of joint pieces 3C and 3D engaging with each other are used, which have slightly different shapes. In the case of this example, each joint piece 3
Although there is a disadvantage that the ridge line shape of the joint becomes stepped when C and 3D are occluded, the present invention is effective in connecting adjacent pipes while minimizing the gap in the engaged state. It is equivalent to that of the embodiment.

Further, in the joint piece 3 of this embodiment, the occlusal portion 4 and the retaining portion 5 are integrally molded, but as shown in FIG. 24, the occlusal portion 4 '
Alternatively, the retaining portion 5'and the retaining portion 5'may be separately manufactured and separately welded to the pipe body 2. With such a configuration,
The mounting height of the joint piece 3'can be kept low, and the interval between the adjacent pipe bodies 2 can be reduced.

Further, in the present embodiment, a description will be given of a case where the joint piece 3 is attached to the pipe body 2 such that the opening positions of the locking grooves 4a are the same in the circumferential direction of the pipe body 2. However, as shown in FIG. 25, the mounting direction of the joint piece 3 is such that the joint pieces 3 mounted in the opposite direction in the circumferential direction of the pipe body 2 are alternately inverted and arranged. Is also good.

FIG. 26 shows a pipe roof pipe according to another embodiment of the present invention. Although the joint pieces having substantially the same shape are used in the above embodiment, in the present embodiment, the male joint piece 7 attached to the one pipe body 2 and the female joint piece 8 attached to the other pipe body 2. The pipes adjacent to each other are connected by interlocking and.
Here, the male joint piece 7 includes a base 7a and the base 7a.
The engaging portion 7b is provided at the center of a, and the tip of the engaging portion 7b has a wide cross section. On the other hand, the female joint piece 8 has a shape having a locking groove 8a which has substantially the same width as the pedestal 7a of the male joint piece 7 and locks the engaging portion 7b of the male joint piece 7. There is.

Also in this embodiment, each joint piece 7,
It is preferable to provide the gap portion 6 on the opposing surface side between the pipe 8 and the pipe body 2. Further, similarly to the above-described embodiment, the outer surface shapes of the joint pieces 7 and 8 are set so that the ridge line shape of the joint in a state where the joint pieces 7 and 8 are engaged with each other is a smooth curve having a concave central portion. Preferably.

FIG. 27 shows a modification of the embodiment shown in FIG. In the male joint piece 7 ′ and the female joint piece 8 ′ of this modified example, the engaging piece 7 c projectingly provided at the center of the pedestal 7 a has a trapezoidal cross section having a wide tip side. Locking groove 8 according to the shape of 7c
The shape of b is selected. The other configurations are similar to those of the joint pieces 7 and 8 shown in FIG.

[Brief description of drawings]

FIG. 1 is a view showing a pipe roof pipe according to an embodiment of the present invention, in which (a) is a side view, (b) is a front view, and (c) is a portion of (b). FIG.

FIG. 2 is a view showing the pipe for a pipe roof of the present embodiment in a connected state, (a) is a front view, and (b) is an enlarged view of part A of (a).

FIGS. 3A and 3B are diagrams showing a connected state when adjacent pipes are displaced from each other.

FIG. 4 is an explanatory diagram of a procedure for burying a pipe.

FIG. 5 is an explanatory view (1) of a water stopping method in a pipe roof method, in which (a) is a plan view of a vertical shaft side wall,
(B) is a front view of a vertical shaft side wall.

FIG. 6 is an explanatory view (2) of the water stoppage method in the pipe roof construction method, in which (a) is a plan view of a vertical shaft side wall,
(B) is a front view of a vertical shaft side wall.

FIG. 7 is an explanatory view (3) of the water stop method in the pipe roof construction method, in which (a) is a plan view of the shaft side wall,
(B) is a front view of a vertical shaft side wall, (c) is a figure which shows a fusing part.

FIG. 8 is an explanatory view (4) of the water stop method in the pipe roof construction method, in which (a) is a plan view of the shaft side wall,
(B) is a front view of a vertical shaft side wall.

FIG. 9 is an explanatory view (5) of a water blocking method in the pipe roof construction method, in which (a) is a plan view of a vertical shaft side wall,
(B) is a front view of a vertical shaft side wall, (c) is the CC sectional view taken on the line of (b).

FIG. 10 is an explanatory view (6) of a water blocking method in the pipe roof method, in which (a) is a plan view of a vertical shaft side wall,
(B) is a front view of a vertical shaft side wall, (c) is the DD sectional view taken on the line of (b).

11 (a) to 11 (d) are exploded perspective views of side packings.

FIG. 12 is an explanatory view (7) of a water blocking method in the pipe roof method, in which (a) is a plan view of a vertical shaft side wall,
(B) is a front view of a vertical shaft side wall, (c) is a EE line sectional view of (b).

FIG. 13 is an explanatory view (8) of a water blocking method in the pipe roof construction method, in which (a) is a plan view of a vertical shaft side wall,
(B) is a front view of a vertical shaft side wall.

FIG. 14 is an explanatory view (9) of the water blocking method in the pipe roof method, in which (a) is a plan view of a vertical shaft side wall,
(B) is a front view of a vertical shaft side wall.

FIG. 15 is an explanatory view (10) of a water stopping method in a pipe roof construction method, in which (a) is a plan view of a shaft side wall, (b) is a front view of the shaft side wall, and (c) is a fusing part. FIG.

FIG. 16 is an explanatory view (11) of the water blocking method in the pipe roof construction method, in which (a) is F of FIG. 15 (b).
3 is an enlarged view of the part, (b) is a sectional view taken along line GG of (a), and (c) is a sectional view taken along line HH of (a).

FIG. 17 is an explanatory view (12) of the water blocking method in the pipe roof construction method, in which (a) is a plan view of the shaft side wall and (b) is a front view of the shaft side wall.

FIG. 18 is an explanatory view (13) of the water blocking method in the pipe roof construction method, in which (a) is a plan view of the shaft side wall and (b) is a front view of the shaft side wall.

FIG. 19 is an explanatory view (14) of the water stoppage method in the pipe roof construction method, in which (a) is a plan view of the shaft side wall and (b) is a front view of the shaft side wall.

FIG. 20 is an explanatory view (15) of a water blocking method in the pipe roof construction method, in which (a) is a plan view of a vertical shaft side wall and (b) is a front view of the vertical shaft side wall.

FIG. 21 is an explanatory view (16) of a water blocking method in the pipe roof construction method, in which (a) is a plan view of a vertical shaft side wall and (b) is a front view of the vertical shaft side wall.

FIG. 22 is a diagram showing a modification of the joint piece.

FIG. 23 is a diagram showing another modification of the joint piece.

FIG. 24 is a view showing another embodiment of the joint piece.

FIG. 25 is a diagram showing a modification of the mounting direction of the joint piece to the pipe body.

FIG. 26 is a view showing a pipe for a pipe roof according to another embodiment.

FIG. 27 is a diagram showing a modified example of FIG. 26.

FIG. 28 is a diagram showing an example of a conventional joint shape.

FIG. 29 is a diagram showing another example of a conventional joint shape.

[Explanation of symbols]

1 Pipe Roof Pipe 2 Pipe Body 3 Joint Piece 4 Interlocking Part 4a Locking Groove 5 Drop-out Preventing Part 6 Gap 7,7 'Male Joint Piece 7a Pedestal 7b Engaging Part 8,8' Female Joint Piece 8a Locking Groove DESCRIPTION OF SYMBOLS 10 Pilot pipe 11 Vertical shaft 12 Ground 13 Source pusher device 15 Water stop device 20 Sheet pile 21 Base plate 22 Water stop plate 23,35 Water stop device mounting plate 24,23a, 36 hole 25,37 Penetration hole 26 Upper packing 27 Lower packing 28 , 29, 38 Side packing (joint packing) 33 Dummy packing 33a Joint piece 34 Kamaboko packing

Claims (8)

[Claims] 1. A pair of joint pieces which are provided in the longitudinal direction along the outer peripheral surface of a pipe for a pipe roof and have at least engaging portions of substantially the same shape are arranged in opposite directions to bite the joint pieces. A joint for a pipe roof for connecting pipes adjacent to each other by aligning, wherein the engaging part of each joint piece has a hook-shaped cross-section occlusal part having a locking groove on the inside, and faces the occlusal part. When the engagement part of one joint piece is engaged with the engagement groove of the other joint piece, the back surface of the engagement part is engaged with the removal prevention part of the other joint piece. A joint for a pipe for a pipe roof, characterized in that the pair of joint pieces are configured to bite each other. 2. The pipe roof pipe joint according to claim 1, wherein the engagement portion and the retaining portion are integrally formed. 3. A joint for a pipe roof pipe, which is provided along the outer peripheral surface of the pipe roof pipe in a longitudinal direction and connects adjacent pipes by engaging a male joint piece and a female joint piece with each other. The male joint piece has a pedestal and an engaging portion protruding from the center of the pedestal, the tip of the engaging portion has a wide cross section, and the female joint piece is A joint for a pipe for a pipe roof, which has a width substantially equal to that of the pedestal of the male joint piece and has a locking groove for locking an engaging portion of the male joint piece. 4. The outer surface shape of each joint piece is set so that the ridgeline shape of the joint piece in a state where the joint pieces mesh with each other is a smooth curve having a concave shape in the central portion. A pipe roof pipe joint according to any one of 1 to 3. 5. A vertical water-stop packing for preventing groundwater from flowing out from the peripheral portion of a joint connecting adjacent pipes to each other when the pipe for pipe roof is penetrated into the underground from the vertical shaft. A vertical shaft water-stop packing having an outer surface shape portion along a ridgeline of the joint and an outer peripheral surface of the pipe continuous with the ridgeline. 6. The shaft according to claim 5, further comprising a dummy packing portion having a shape substantially the same as that of a joint piece of an adjacent pipe that engages with a joint piece provided on the outer peripheral surface of the pipe. Water-stop packing. 7. A water stopping method in a pipe roof construction method using a pipe roof pipe having the pipe roof pipe joint according to any one of claims 1 to 4, comprising: (a) penetration of a leading conduit pipe. After that, the arc-shaped packing attaching step of attaching the arc-shaped packing along the arc-shaped portion of the penetration hole corresponding to the arc-shaped portion of the pipe to be penetrated excluding the peripheral portion of the joint, (b) after this arc-shaped packing attachment step A joint piece of an adjacent pipe which has an outer surface shape portion along the ridgeline of the joint and an outer peripheral surface of the pipe continuous with the ridgeline and which meshes with a joint piece provided on the outer peripheral surface of the pipe. Joint part packing installation work for continuously attaching the joint part packing having the dummy packing part to the arc-shaped packing (C) a pipe penetration step of penetrating a pipe with a joint into the penetration hole after the joint packing attaching step, and (d) a joint on a side adjacent to the pipe to be penetrated next after the pipe penetration step. A waterproofing method in a pipe roof construction method, which comprises a joint packing removing step of removing a partial packing. 8. A water stop method in a pipe roof construction method using a pipe roof pipe having the pipe roof pipe joint according to any one of claims 1 to 4, comprising: (a) penetration of a leading conduit pipe. An arc-shaped packing attaching step of later attaching the arc-shaped packing along the arc-shaped portion of the penetration hole corresponding to the arc-shaped portion of the pipe to be penetrated excluding the peripheral portion of the joint, (b) after this arc-shaped packing attachment step A joint piece of an adjacent pipe which has an outer surface shape portion along the ridgeline of the joint and an outer peripheral surface of the pipe continuous with the ridgeline and which meshes with a joint piece provided on the outer peripheral surface of the pipe. Joint part packing installation work for continuously attaching the joint part packing having the dummy packing part to the arc-shaped packing (C) A pipe penetration step of penetrating a pipe with a joint into the penetration hole after the joint packing mounting step, and (d) a joint on the side adjacent to the pipe to be penetrated next after the pipe penetration step. After the joint packing removal step of removing the section packing and (e) this joint packing removal step, the steps (a) to (d) are repeatedly performed on the adjacent pipe, and if necessary during this step. A waterproofing method in a pipe roof construction method, comprising a waterproofing agent injecting step of injecting a waterproofing agent between adjacent joint pieces.