JPH04112990U - underground pipe - Google Patents

Abstract

(57) [Summary] [Purpose] To enable monitoring of the press-fit condition of each pipe when burying steel pipes in parallel underground. [Structure] Transparent windows 2, which can be opened and closed from the inside by lids 3, are provided on the side surface of the tube main body 1 at appropriate intervals in the length direction, and a center line 17 is provided between the transparent windows 2. An underground pipe configured to monitor the press-fitting state of the pipe main body 1 by opening the transparent window 2 at the time of press-fitting and burying the pipe main body 1 and using the center line 17 provided on the opposite side of the already buried pipe main body 1 as a guide. .

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to the improvement of underground pipes made of steel pipes buried in parallel underground. It is something that

0002

[Conventional technology]

Traditionally, underground structures have been constructed to create grade-separated intersections between railways and roads, for example. In such cases, a shaft is excavated on both sides of the railway or road, and then a steel pipe is installed between both shafts. The steel pipes are buried in parallel, and the front end of the upper floor of the ready-made underground structure is brought into contact with the rear end of this row of steel pipes. by pushing the steel pipe row into the other shaft. How to construct an underground structure by burying the underground structure underground using the steel pipe rows as a guide. The law is known.

0003 In this construction method, rows of steel pipes are laid underground between the shafts in advance as described above. To do this, first push a steel pipe from one shaft toward the other. The ground was buried while excavating the ground in front using an earth auger inserted inside the building. Press fit the next steel pipe along the side of this steel pipe in the same way and repeat this process. It is laid down by doing a return.

0004

[Problem that the idea aims to solve]

However, when press-fitting steel pipes into the ground, there are differences in strength due to the hardness and softness of the ground. The press-fit condition may be caused by existing boulders, etc., or by the rotational reaction force of the earth auger. changes, even if the opposite sides of the steel pipe are engaged with each other by a joint. If the joint comes off and multiple steel pipes are connected in the same horizontal plane along their entire length. This makes it difficult to press-fit the steel pipes in a vertical direction toward the tip. Due to the displacement, the lower surface of the steel pipe row became uneven, which caused the underground structure to be buried. This will hinder your work.

[0005] For this reason, during press-fitting of a steel pipe, it is possible to check whether the steel pipe is being propelled in the correct direction. It is necessary to pull out the earth auger and survey, which is a complicated work and There was a problem in that the press-fitting of steel pipes could not be carried out efficiently.

[0006]

[Means to solve the problem]

The purpose of this invention is to provide an underground pipe that can solve these problems. Then, transparent windows 2 are provided at desired intervals in the length direction on the side surface of the pipe main body 1, and the transparent windows 2 are closed with a lid. It is characterized by being detachably closed by the body 3.

[0007]

[Effect]

With the above configuration, after burying one pipe main body 1 underground, When press-fitting the next pipe main body 1 along the side of the pipe main body 1, the inside of the pipe main body 1 that has already been buried. A worker or the like enters the pipe body 1 and removes the lid 3 of the transparent window 2 at the appropriate location and removes the transparent window 2 from the pipe body 1. This is to monitor the press-fitting state of the tube main body 1 during press-fitting.

[0008]

【Example】

Next, an embodiment of the present invention will be explained with reference to the drawings. 1 is a square steel pipe with a rectangular cross section. It is a main body of a pipe with a certain length dimension, and on both sides there are A rectangular transparent window 2 is provided so that the outside can be seen from inside the tube main body 1 through the transparent window 2. Furthermore, each transparent window 2 is normally closed with a lid 3.

[0009] As shown in FIGS. 2 and 3, this lid body 3 is formed larger than the transparent window 2. Both have a rectangular shape having approximately the same wall thickness as the tube main body 1 and fitting into the transparent window 2 at the center of one side thereof. A fitting plate portion 4 is provided integrally, and bolt mounting holes 5 are provided at multiple locations on the periphery. has been drilled. Further, the bolts are attached to the peripheral edge of the transparent window 2 on the inner surface of the tube main body 1. A screw hole 6 is provided that matches the mounting hole 5, and a bolt is inserted from the bolt mounting hole 5 into the screw hole 6. The cover body 3 is detachably attached to the transparent window 2 by screwing the cover 7. be.

0010 Reference numeral 8 denotes an edge cutting plate made of a flat steel strip laid on the upper surface of the pipe main body 1. Also, pipe main body 1 A horizontal center line 17 is provided between the transparent windows 2, which are adjacent to each other at the center of both sides.

[0011] In order to use the pipe constructed in this way for example in the construction of an underground structure, the method shown in Fig. 4 is used. As shown, first, a starting side shaft 9 and an arrival side shaft 10 are built on the ground where the underground structure is to be constructed. After excavating, press the pipe main body 1 from the starting side vertical shaft 9 toward the destination side vertical shaft 10. Ru. At this time, insert the earth auger 11 into the pipe main body 1 as shown in FIG. Excavate the ground in front while rotating Suoger 11, remove it to the rear, and emit The pipe main body 1 is pushed forward from the advancement side shaft 9 by an appropriate pressing means such as a jack.

0012 When this pipe main body 1 is press-fitted into the ground, the next pipe main body 1 is connected to the rear end of the pipe main body 1. At the same time, add earth auger 11 and press-fit it in the same way as above, and repeat this process. The pipe bodies 1 connected in series are buried between both vertical shafts. Please note that when doing this, please fill in the The tip of the edge cutting plate 8 of the pipe main body 1 to be installed is integrated with the tip of the pipe main body 1 by welding or the like. The edge cutting plate 8 of the subsequent pipe main body 1 is fixed to the edge cutting plate 8 of the pipe main body 1 buried earlier. It is integrally connected to the rear end by welding, etc.

[0013] In this way, after burying the main pipe body 1 in series between the shafts 9 and 10, Press fit the next pipe main body 1 in parallel to the side surface of the pipe main body 1 by using the same method as above. However, in advance, joints 12, which can be engaged with each other, are provided on both sides of the pipe main body 1. 13 protruding in the length direction, and then apply pressure to the joint 12 of the pipe main body 1 that has already been buried. It is preferable to press fit while engaging the joint 13 of the tube main body 1 to be inserted.

[0014] During this press-fitting work, the space inside the pipe main body 1 that has already been buried is used to When a worker enters the body 1, removes the lid 3 at the appropriate place and opens the transparent window 2, The press-fitting state of the pipe main body 1 being press-fitted through the transparent window 2 is checked inside the pipe main body 1 that has already been buried. It can be monitored by visually observing the core wire 17, and the earth auger 11 can be pulled out as before. This makes it possible to check the accuracy without any trouble.

[0015] By repeating the above press-fitting operation, the pipe main bodies 1 connected in series are arranged in parallel in the horizontal direction. After that, insert the edge cutting plate 8 installed on the pipe main body 1 in the last row through the turnbuckle 14, etc. The tip of one row of main pipes is fixed to the starting side shaft 9 and protrudes into the destination side shaft 10. After cutting off the tip of the edge cutting plate 8 on the frontmost side from the end and separating it, An underground structure 15 is installed, and the front end of the upper floor of this underground structure is placed behind one row of main pipes. The ground in front of the underground structure 15 is dug while pushing it forward with the jack 16 while touching the end face. cut down

[0016] Then, the underground structure 15 moves forward with its upper surface slidingly in contact with the lower surface of the edge cutting plate 8. As the pipe main body 1 advances, it is pushed out into the destination shaft 10 and removed. child When the burial of underground structure 15 is completed, the next underground structure 15 is connected and promoted in the same way. By repeating this process, a series of underground structures will be created between both shafts 9 and 10. This is a structure that forms an underground passage.

[0017] In addition, in the above embodiment, the pipe main body 1 was used in the construction method of the underground structure, but It can also be used as a lining material when excavating tunnels, etc. In such cases, the edge Of course, the cutting plate 8 is not required.

[0018]

[Effect of the idea]

As described above, according to the underground pipe body of the present invention, on the side surface of the pipe body 1, in the length direction. Transparent windows 2 are provided at desired intervals, and the transparent windows 2 are removably closed with lids 3. Therefore, after one pipe main body 1 is buried underground, the side surface of this pipe main body 1 is When press-fitting the next pipe main body 1 along the The transparent window 2 is removed by removing the lid 3 of the transparent window 2 at the appropriate position of the tube main body 1. It is possible to monitor the press-fitting state of the pipe main body 1 during press-fitting. This eliminates the need to pull out an earth auger or other excavating machine from the inner tube. This not only eliminates the causes of accidents that may occur during this work, but also eliminates the need for press-fitting and burying pipes. It can be done efficiently.

[Brief explanation of drawings]

[Figure 1] Side view of the tube body

[Figure 2] Its vertical front view

[Figure 3] Perspective view of the lid

[Figure 4] Simplified vertical side view showing an example of use

[Figure 5] Its vertical front view

FIG. 6 is a vertical sectional front view with the earth auger inserted.

[Explanation of symbols]

1 Management entity 2 Transparent window 3 Lid body.

Claims (1)

[Scope of utility model registration request] 1. An underground installation characterized in that transparent windows 2 are provided on the side surface of a pipe main body 1 at desired intervals in the length direction, and the transparent windows 2 are removably closed by a lid body 3. tube.