JP2007277825A - Construction method of buried pipe under road - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method of a buried pipe capable of laying regardless of the length of the buried pipe, when installing the buried pipe of a road including the hard ground such as base rock. <P>SOLUTION: This invention relates to the construction method of the buried pipe by the following processes: (1) the process of crushing the hard ground above an installation position of the buried pipe in a shape without hindering installation, (2) the process of performing up to temporary restoration on the same day, by easily paving, by temporarily filling up an excavation hole finished with crushing by a backfilling material such as a crushed stone, (3) the process of performing up to temporary restoration similar to the above process on the same day to the excavation hole finished with its crushing, by crushing the hard ground of a position continuing with the excavation hole of the process of (2) in a predetermined shape, and (4) the process of performing up to restoration on the same day, by paving with a paving material, by backfilling the periphery and an upper part of the buried pipe by protective sand and the backfilling material, by integrally connecting with a previously laid buried pipe, by laying the buried pipe in a predetermined position, by digging up a part temporarily restored in the above process, when the total extension of a crushed part reaches the expected buried pipe length, by repeating the processes of (1) to (3). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for constructing a buried pipe when the buried pipe is installed at a position below a hard ground such as a rock under a road.

When pipes such as gas pipes, water pipes or sewage pipes are buried under the roads, road excavation work will be carried out. On main trunk roads with heavy traffic, traffic congestion due to road traffic regulations accompanying construction As a mitigation measure, road use permission is often obtained under conditions such as opening the road surface during heavy traffic hours such as commuting hours. Under such road use permission conditions, the following two construction methods have been adopted so far.
(1) Construction method that performs excavation, laying of buried pipes, backfilling, and temporary restoration within the workable time zone on the same day,
(2) A method of covering the excavation hole with a lining plate during road opening hours and holidays, temporarily completing the road surface to open the road surface, and removing the lining plate at a later date to continue the construction.

However, in places where a hard rock such as a lava layer exists under the road, it takes a long time to crush the rock during excavation, so the restoration work of (1) above was often impossible on the same day. In such a case, it was necessary to use the method (2) using the lining plate.
However, in this case as well, when the rock in the excavation area was crushed with a breaker, the foundation of the lining plate support girder had a bad influence due to vibration during crushing, and it was necessary to deal with them. Furthermore, since the above crushing work involves noise, the work hours are limited to daytime, and a series of work up to crushing, excavation, and earth retaining is performed for one day while ensuring the safety of passing vehicles when the road surface is open. Completion in time occurred depending on the amount and hardness of the rock mass, even when the construction extension for one day was substantially zero, and the construction speed was significantly reduced.

In this way, the construction speed of buried pipe laying is determined by the speed of rock crushing, which requires the most time. Therefore, depending on the hard ground, it can lead to a significant delay in the construction period, causing inconvenience to surrounding residents and passing vehicles for a long time. There were many things.
Japanese Patent Publication No. 1-14365 JP-A-8-193304 JP 2001-81708 A Japanese Patent Laid-Open No. 2001-311109

  The present invention was devised in view of the difficulty of installing buried pipes under the road including hard ground such as the above-mentioned rocks, etc., until the hard ground crushing work in the daytime and temporary restoration by temporary paving. Constructed on the same day, leading the work over several days, and when the predetermined length section was obtained, excavating the temporary restoration work surface and installing and connecting the buried pipe at once, mainly during the work hours in the daytime The construction method decided to be restored again is provided.

This invention is characterized by the construction method of the underground pipe under the road which consists of the following processes.
1) A step of crushing a hard ground such as a bedrock located on the upper side, which is an installation location of a buried pipe under a road, with a depth and a width that does not hinder the installation of the buried pipe.
2) The process of temporarily filling the excavation hole after crushing with a backfill material such as crushed stone, performing simple paving with a paving material, and temporarily restoring it.
3) Crushing hard ground such as rock in a position continuous to the excavation hole in step 2) with a predetermined depth and width, and backfilling material such as crushed stone in the excavation hole after crushing, as in the above step The process of temporarily filling in and then paving with a paving material and temporarily recovering.
4) The above steps 1) to 3) are repeated, and when the total length of the crushed portion reaches the length of one or several buried pipes, the paving material and backfill material temporarily restored in the above steps are dug up. The buried pipe is laid at a predetermined position, connected and integrated with the previously buried pipe, the surrounding area of the buried pipe is backfilled with protective sand, the surrounding area and the upper part are backfilled with the backfill material, and the pavement is paved. The process of performing the same day until recovery.

  The backfilling material is characterized by a construction method for a buried pipe under a road that uses a crushed bedrock as it is or in combination.

  Further, the backfill material is characterized by a construction method of a buried pipe under a road in which polystyrene foam is disposed in a drilling hole and the surrounding area is backfilled by crushed stone or the like.

  Furthermore, the backfilling material is characterized by a construction method of a buried pipe under a road in which a bag pack filled with crushed stone is placed in the center of the excavation hole, and the surrounding area is backfilled by crushed stone or the like. And

  Moreover, the construction method of the buried pipe which used the said pavement material as the asphalt is characterized.

  Furthermore, the construction method of the underground pipe under the road which used the said pavement material as the iron plate is characterized.

  In the present invention, among the same day work of excavation, laying of buried pipe, backfilling and pavement, which is the construction work of buried pipe, omitting the laying of buried pipe, leading the construction of excavation and temporary filling and simple pavement, When a predetermined length of excavation hole is completed, the recovery method in the excavation hole is removed and the buried pipe is installed at once. By separating the construction, it was possible to construct the buried pipe at the fastest construction speed.

In addition, by adopting the construction method of the present invention, it is possible to minimize the influence on the inhabitants and passing vehicles, and it is possible to lay long buried pipes at a stretch. The lining plate installation, removal, excavation and earth retaining, pipe laying, backfilling, and temporary restoration, which required 5-6 days, were made possible in one day.
Furthermore, since it is possible to lay long buried pipes, it is possible to reduce the number of pipe connections, so that the width of excavation grooves and installation work required for connection work are reduced, and work efficiency is greatly improved. It has become possible to provide construction methods that are superior in terms of environment and economy.

  Furthermore, since it is possible to reduce the number of connection points of the buried pipe, it is possible to omit the connection parts at that point, and to reduce the rate of occurrence of leakage of gas, water, etc. from that point. It became.

  In addition, by using a bag pack filled with foamed polystyrene or crushed stone at the center as a means for temporarily filling the borehole, the temporary filling work can be shortened, and at the same time, the efficiency of the excavation work when laying the buried pipe It became possible to plan.

  Furthermore, since the pavement material is an iron plate, it is only necessary to install it on the road surface side of the excavation hole, and it is possible to shorten the time for temporary restoration work and excavation work.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view of a road 1 showing a position where a buried pipe 2 such as a gas pipe, a water pipe or a sewage pipe is laid under the road. In the upper portion of the road 1 where the buried pipe 2 is laid. Hard ground 3 such as bedrock exists. In order to lay the buried pipe 2, the hard ground 3 needs to be crushed. For example, in the case of a rock mass, the rock mass will be crushed by the breaker 4 as shown in FIG. 2, but when a rock mass of about 30 to 40 cm in thickness exists in a drilling hole having a depth of about 2 m and a width of about 1 m, Due to the work range, even if the work was carried out efficiently, the crushing extension in one day was only about 3 m at most.

  Therefore, crushing the rock mass, forming an excavation hole, burying a buried pipe in the excavation hole, performing backfilling and performing simple pavement requires a long time for excavation of the rock mass, It is extremely difficult to complete the above steps, and the length of the buried pipe is limited to a short length, which is a practically impossible construction method.

  Therefore, in the embodiment of the present invention, as shown in FIG. 2, the crushing process of the hard ground 3 such as a rock is mainly performed, and the excavation hole after the crushing is performed as shown in FIG. The material is temporarily buried with another backfill material 5 such as crushed stone, and the pavement material 6 on the road 1 side which is the surface side is temporarily restored by simple pavement means such as asphalt or iron plate.

  At a position continuing to the excavation hole formed by the above process, the hard ground 3 such as the bedrock, which is the same construction method as described above, will be crushed by the backfill material 5 and temporarily restored by the pavement material 6 at a later date. Will do.

  By repeating the above construction for several days, it is possible to construct a drilling hole in which the hard ground 3 in a temporarily restored state having a predetermined length does not exist. 4, as shown in FIG. 4, the pavement material 6 and the temporarily backfill material 5 temporarily restored by the preceding process are removed from the excavation hole 7 and buried in a predetermined position in the excavation hole 7. Pipe 2 is laid.

  As shown in FIG. 7, the laid pipe 2 is connected to each other by welding or other connecting means 8 at the end of the previously laid pipe.

  After the laying and connection of the buried pipe 2 are completed, as shown in the cross-sectional view of FIG. 5, the buried pipe 2 is backfilled with protective sand 9, and the backfill material 5 such as crushed stone is provided above the buried pipe 2. The road surface side is restored by the pavement 6.

  Since the installation of the buried pipe 2 is performed without the need to crush the hard ground on the same day, it can be performed efficiently, and the subsequent recovery can be performed on the same day with sufficient time.

  FIG. 6 is a cross-sectional view in the longitudinal direction of the road showing the position of the excavation hole from which the hard ground 3 such as a rock was crushed and the hard ground 3 was removed, and was formed by crushing the hard ground over 4 days and The temporary filling of the excavation hole and the simple pavement are continuously performed, and the temporary restoration section that has been crushed for the above four days is digged up again on the fifth day, and as shown in FIG. One or a suitable number of buried pipes 2 are laid in a predetermined position of the excavation hole 7 to be connected to each other by an appropriate connecting means 8 and the end of the buried pipe, and then the surroundings of the buried pipe 2 are It is fixed while being protected by the protective sand 9, and the backfill material 5 such as crushed stone is backfilled above it, and the pavement material 6 is paved and restored.

  FIG. 8 shows another embodiment of the backfilling material 10 temporarily buried in the excavation hole, in which an appropriate number of polystyrene foams are arranged in the center of the excavation hole, and other granular materials such as crushed stones are arranged around it. It is sectional drawing which shows the state with which the backfill material 11 was filled. Since the expanded polystyrene is strong in compressive force, the central part of the excavation hole is a place where the compressive force is applied mainly by the load of the vehicle or the like from above, and therefore it is arranged at that position. In addition, the gap between the periphery of the expanded polystyrene and the wall of the drilling hole is filled with a granular backfill material 11 such as crushed stones to prevent breakage of the expanded polystyrene and the collapse of the drilled hole wall. can do. As the shape of the polystyrene foam, a shape having an appropriate shape can be adopted as long as it has a shape in which a gap does not occur in the periphery.

  By disposing the expanded polystyrene in the excavation hole, the temporary filling and excavation work becomes extremely simple and can be performed efficiently.

  FIG. 9 shows another embodiment of the backfilling material 12 temporarily buried in the excavation hole as in the second embodiment, and an appropriate number of bag packs filled with crushed stones are arranged in the center of the excavation hole. FIG. 3 is a cross-sectional view showing a state in which other granular backfill material 13 such as crushed stone is filled in the periphery thereof. As mentioned above, since the crushed stone is packed, it is easy to temporarily bury it in the drilling hole and dig up from it, and at the same time hold the irregular shape because the crushed stone is packed. By filling and filling other granular backfilling material 13 into the gap between the backfilling material 12 of the bag pack and the wall of the excavation hole, it is possible to adapt to the surrounding shape. Backfilling can be performed.

Cross-sectional view of a road showing an embodiment of the buried pipe laying of the present invention Sectional drawing of the road which shows the state which is crushing the bedrock of the Example of this invention Sectional drawing of the road of the state which carried out the temporary restoration | restoration by constructing a backfill material and a pavement material in the excavation hole of the Example of this invention Sectional drawing of the road of the state which dug up the pavement material and backfilling material in the excavation hole in the crushed section of the Example of this invention, and laid the buried pipe Sectional drawing of the road of the state which laid the underground pipe of the Example of this invention, constructed the backfill material and the pavement material, and was temporarily restored. Longitudinal sectional view of the road showing the position of the excavation hole for crushing the hard ground over the four days of the embodiment of the present invention Longitudinal sectional view of a road in a state where a buried pipe is laid in an excavation hole formed over four days according to an embodiment of the present invention Sectional drawing of the road of the state which backfilled the backfill material which shows the other Example of this invention Sectional drawing of the road of the state which backfilled the backfill material which shows the other Example of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Road 2 Buried pipe 3 Hard ground 4 Breaker 5 Backfill material 6 Pavement material 7 Drilling hole 8 Connection means 9 Protective sand 10,12 Backfill material 11,13 Other granular backfill materials

Claims (6)

Construction method of buried pipe under the road consisting of the following processes.
1) A step of crushing a hard ground such as a bedrock located on the upper side, which is an installation location of a buried pipe under a road, with a depth and a width that does not hinder the installation of the buried pipe.
2) The process of temporarily filling the excavation hole after crushing with a backfill material such as crushed stone, performing simple paving with a paving material, and temporarily restoring it.
3) Crushing hard ground such as rock in a position continuous to the excavation hole in step 2) with a predetermined depth and width, and backfilling material such as crushed stone in the excavation hole after crushing, as in the above step The process of temporarily filling in and then paving with a paving material and temporarily recovering.
4) The above steps 1) to 3) are repeated, and when the total length of the crushed portion reaches the length of one or several buried pipes, the paving material and backfill material temporarily restored in the above steps are dug up. The buried pipe is laid in a predetermined position, connected and integrated with the previously buried pipe, the surrounding area of the buried pipe is backfilled with protective sand, the surrounding area and the upper part are backfilled with the backfill material, and the pavement is paved. The process of performing the same day until recovery.   The method for constructing a buried pipe under a road according to claim 1, wherein the backfilling material is used as it is or in combination with the crushed bedrock.   2. The method for constructing a buried pipe under a road according to claim 1, wherein the backfill material is formed by placing foamed polystyrene in the excavation hole and surrounding the surrounding area with crushed stone or the like.   The backfilling material according to claim 1, wherein the backfilling material is formed by placing a bag pack filled with crushed stone or the like at the center of the excavation hole and surrounding the surrounding area with crushed stone or the like. Construction method for underground pipes.   The construction method for buried pipes under a road according to any one of claims 1 to 4, wherein the paving material is asphalt.   The construction method of the buried pipe under the road according to any one of claims 1 to 4, wherein the pavement material is an iron plate.

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