JP5572539B2 - Temporary piping installation method - Google Patents

Description

  The present invention relates to an installation method of a temporary pipe that becomes a bypass pipe of a main pipe before repair or replacement work of the main pipe.

  In the construction of gas pipes and water pipes, it is necessary to install detour pipes (temporary pipes) for the main pipes so that the supply of gas and water is not interrupted. Therefore, temporary piping installation work is performed in which temporary piping is buried and the temporary piping buried after the main construction is dug.

The above-mentioned temporary pipe digging is performed by mechanical excavation ( Yumbo: registered trade name or power shovel ) up to the vicinity of the temporary pipe burying depth, and thereafter, the peripheral part of the temporary pipe is manually dug. .

  In addition, in the case of main construction, if the construction takes several days, temporary backfilling will be carried out after the completion of the day's construction, and the temporary backfilling site will be dug up again when the construction is resumed. In order to simplify the excavation work, instead of heavy earth and sand, a lot of synthetic resin hollow spheres are put in a net, the net body is filled at the bottom of the excavation groove, and the upper part of the excavation groove is a fixed partition material Means for filling a roadbed material via a (water-permeable sheet) and temporarily burying it is known (Patent Document 1: Japanese Patent Laid-Open No. 7-317008).

  Further, in Patent Document 2 (Japanese Patent Laid-Open No. 8-193304), instead of the hollow sphere-filled net body, 5-20 kg of an independent foamed resin block body is adopted, and a sand bag is placed above the block body. A construction method has been disclosed that employs a middle layer temporary buried body and further employs earth and sand as an upper layer temporary buried body.

JP-A-7-317008. JP-A-8-193304.

  As described above, the temporary piping is dug up by a combination of machine digging and manual digging, and the manual digging work is a cumbersome work, similar to the main pipe construction. However, it is not recognized that the use of the temporary buried body disclosed in Patent Documents 1 and 2 is suitable for the construction of temporary piping.

  Main pipe construction requires daily digging, and the deformation of the resin temporary embedding can be confirmed at the time of daily digging, and it can be replaced as soon as damage deformation is confirmed. Rather than digging up immediately like temporary backfilling in main construction, the state of burial for a long period (several months) is maintained, so that loads such as vehicle travel on the burial site are constantly added during that period. Thus, when the resin-made temporary embedded body is deformed, the portion is depressed, and there is a danger in vehicle travel.

  In addition, the main pipe must be buried at a suitable depth to ensure long-term safety, and backfilling and re-digging requires a certain depth. Although it can be said that the use of various temporary buried bodies is effective when viewed comprehensively, in the construction work of temporary piping that can be buried shallower than the main pipe, Adoption of a temporary manufacturing body is an excessive quality, which is a problem in terms of cost.

  Therefore, the present invention proposes a novel temporary piping installation method that facilitates excavation of temporary piping without using a temporary buried body.

  The temporary pipe installation method according to the present invention is a temporary pipe formed by digging a digging groove for setting a temporary pipe, placing the temporary pipe on the bottom surface of the digging groove, and backfilling the earth and sand in the digging groove. In the installation method, a sheet body in which an engaging portion for pulling is projected from the end of a long belt-like sheet body having an appropriate width is attached to the temporary piping when the earth and sand are backfilled, and the sheet body is turned. The temporary piping is covered so that the surface of the temporary piping is exposed by raising or lifting.

Thus, in the above-described temporary pipe installation method, the excavation when removing the temporary pipe is performed by the same machine digging as before until the appropriate depth (the depth at which the sheet body can be raised or lifted later), After the machine digging, the locking part for pulling up the seat body is connected to an excavating machine such as Yumbo (registered trademark) , a traveling machine such as a dump truck, a lifting machine such as a crane, and the like. Alternatively, when the surface is lifted, the surface of the temporary piping is exposed, and the temporary piping is removed as it is or by performing some manual digging.

  The temporary piping installation method according to the present invention (Claim 2) is the above-described installation method, wherein when the earth and sand are backfilled, the position of the locking portion is at least greater than the depth at which the backfilled earth and sand can be mechanically excavated. Since the engaging part is exposed reliably by mechanical excavation of backfill earth and sand, removal of the backfill earth and sand covering the temporary piping by connecting the exposed engaging part to a predetermined machine However, this is done efficiently.

  Furthermore, the temporary pipe installation method according to the present invention (Claim 4) is such that part or all of the sheet main body has a net or other water-permeable structure, and even if the rain penetrates into the excavation groove backfilled, the sheet body Will not stay.

  The configuration of the present invention is as described above, and without using a special resin temporary embedding body, the excavation soil of the excavation groove and the backfilling sand are used in the same manner as before. However, when digging up the temporary piping when the temporary piping is removed, most of it is excavated by mechanical force. The surrounding part (particularly the part covering the upper surface) is removed by raising the sheet main body, and even if it remains, the surrounding earth and sand in the vicinity of the temporary piping is removed by raising the sheet body. The temporary pipe can be easily removed as it is or by simple manual digging, and the amount of excavated earth and sand when removing the temporary pipe is small, and the temporary pipe can be removed with a simple temporary pipe installation method. The work efficiency of the work is intended to significantly improve.

Explanatory drawing of the sheet | seat body used for 1st embodiment construction method of this invention. Explanatory drawing of the temporary piping installation process of the construction method. Explanatory drawing of the excavation work (perspective view of mechanical excavation). The same figure (side view of machine digging). The same figure (perspective view when the seat body is lifted). The same figure (side view when the seat body is lifted). The figure (dismantling and removal of temporary piping). The other example figure of the temporary piping and sheet | seat body arrangement | positioning. Explanatory drawing of the sheet | seat main body used for the 2nd embodiment construction method of this invention. Explanatory drawing at the time of digging up (perspective view at the end of machine digging). The same figure (perspective view when the seat body is lifted).

  Next, an embodiment method according to the present invention will be described. The method of the present invention uses a predetermined sheet body 1. Further, a connecting tool 2 necessary for raising the sheet body 1 is used in accordance with the shape and structure of the sheet body 1.

  The sheet body 1 is formed of a material having a sufficient durability so that the sheet body 11 is not damaged when the sheet body 11 is lifted upward with earth and sand placed thereon, and the width is at least equal to or larger than the pipe diameter of the temporary piping. Thus, the length is appropriate for the work described later, and a pulling-up locking portion 12 is provided on at least one end side.

The locking portion 12 is provided so that the seat body 11 can be lifted or lifted with earth and sand on it. For example, as shown in the figure, an arm band portion 13 attached to the seat body 11 is provided. The connecting tool (rod-like body) 2 is attached to the ring-shaped engaging portion 12 and the connecting tool 2 is pulled up (the tip of the arm of the excavating machine 3 : action). Part 31 and other traveling machines), or further connected via an intervening tool 21 such as a chain in addition to the connecting tool 2. Of course, only the intervening tool 21 such as a chain may be used without using the connecting tool 2, and the lifting machine is not particularly limited, and the structure of the locking portion 12 corresponding to the machine to be used.・ The shape should be determined.

  In addition, when the seat body 11 is lifted and used, the locking portion 12 is provided at the four corners so that it can be lifted by a machine. For this reason, the sheet body 1 is provided with appropriate intervals on the side edges.

Next, the construction method using the sheet body 1 according to the present invention construction method (temporary piping installation construction method) will be described. In order to embed the temporary piping 4, the excavation groove 5 for installing the temporary piping is excavated by a predetermined excavating machine 3 equipped with a hydraulic excavator such as Yumbo (registered trademark) . The excavation groove 5 has a depth that matches the depth at which the temporary piping 4 should be installed, except for the portions necessary for the connection of the temporary piping 4.

  The temporary pipe 4 is placed directly on the bottom surface 51 of the excavation groove 5, and the sheet main body 11 is then put in close contact with the temporary pipe 4 to cover the temporary pipe 4. As a starting state using such a tool (FIG. 2B), the excavation groove 5 is backfilled with earth and sand 7. The arrangement of the sheet main body 11 in the excavation groove 5 is not limited to the above-described procedure. For example, after the earth and sand 7 is put into the side space of the temporary piping 4 and partially backfilled, the temporary installation is performed. You may make it cover the piping 4 upper part.

  The refilling of the earth and sand 7 is usually performed while leaving the upper part of the excavation groove 5 and is appropriately filled with crushed stone 71 and temporary pavement 72 on the surface, or a covering mat is laid and the temporary piping 4 is installed. The process ends (FIG. 2C).

  And the said temporary piping 4 needs to be dug up and removed after the main pipe construction is completed. The present invention aims to improve the efficiency of this removal work.

  In the temporary pipe removal work, the temporary pavement 72 is first peeled off by the excavating machine 3 (not required when using the covering mat), the crushed stone 71 is removed, and the tip of the locking portion 12 (locking portion) is exposed as necessary. Until then, excavate the sediment 7. Of course, when the embedding position of the temporary pipe 4 is shallow, the excavation of the earth and sand 7 is not performed, and the crushed stone 71 is simply removed, and the sheet body 1 is embedded so that the locking portion 12 is exposed. You can leave it.

  Further, when the locking portion 12 is not exposed by machine digging, the locking portion 12 is exposed by manual digging, and a sheet body 11 described later is lifted and lifted.

  Next, after the locking portion 12 of the sheet body 1 (the tip of the armband portion 13) is exposed, the connector 2 is inserted and attached to the left and right locking portions 12, and the working portion of the excavating machine 3 (the tip of the arm) The excavator 3 is connected to the excavator portion 31 with an intervening tool 21 such as a hook chain, and the excavating machine 3 lifts the seat body 11 so as to be folded back in the direction in which the seat body 11 is embedded. 7 is removed from the periphery of the temporary piping 4 (particularly the upper covering portion), and the surface (upper surface portion) of the temporary piping 4 is exposed (FIG. 5). If the degree of exposure is low, the necessary amount is exposed by hand digging. And the temporary piping 4 is removed from the inside of the excavation groove 5 in the said state (FIG. 7).

  In the operation of taking out the temporary piping 4, manual digging may be performed as necessary. Even in this case, the earth and sand 7 that has been squeezed by running of the vehicle or the like is lifted up by lifting the seat body 11. Since the nearby earth and sand 7 is unraveled, it is possible to easily carry out manual digging work.

  Further, instead of lifting the sheet main body 11, the entire sheet body 1 may be lifted together with the earth and sand 7. In this case, the structure and shape of the locking portion 12 are also suitable for the lifting work.

  As described above, when the temporary piping installation method of the present invention (first embodiment) is adopted, the minimum necessary sediment 7 is not excavated in the temporary piping removal operation without excavating almost all of the sediment 7 in the excavation groove 5. The temporary piping 4 can be taken out by removing only from the excavation groove 5 by mechanical excavation.

  As described above, the temporary pipe 4 can be taken out directly or by adding a simple manual digging operation when the sheet body 1 is rolled up. The width of the sheet body 11 and the machine excavation depth (the length of the belt arm portion 13 provided with the locking portion 12 and the rising height) are determined by the tube diameter and the like. When the earth and sand 7 is removed by lifting the sheet main body 11, the sheet main body 11 is sized to be lifted.

  Further, the arrangement of the temporary piping 4 in the present invention is not limited to the center of the bottom surface of the excavation groove 5 as shown in the figure, and there may be a case where the bottom surface 51 of the excavation groove 5 is biased. In this way, it is arranged in close contact with the upper surface of the temporary pipe 4 at a biased position.

  In addition, as shown in FIGS. 9 to 11, the present invention may use a sheet body 1a that does not include the armband portion 13 (second embodiment method).

  That is, the long sheet body 1a is formed of a material having a sufficient durability so that the sheet body 11a is not damaged when the sheet body 11a is lifted upward with the earth and sand placed thereon, and is formed with a through hole in a corner portion of the sheet body 11a. The raised locking portion 12a is provided.

  Thus, in the same manner as in the first embodiment, the sheet body 1a is also provided with the temporary piping 4 on the bottom surface 51 of the excavation groove 5, and then the temporary piping 4 with the sheet body 1a and the temporary piping 4. The earth and sand 7 are back-filled by being in close contact with each other. In particular, at the time of the backfilling, as shown in FIG. 10, it is preferable that the through-hole portions (locking portions) 12a at the corners of the sheet body 1a are jumped up. And temporary restoration is performed as before and the installation work of the temporary piping 4 is completed.

  As with the first embodiment method, the temporary piping removal work after the main pipe work is completed is performed by peeling the temporary pavement 72 with the excavating machine 3, removing the crushed stone 71, and further exposing the locking part (through hole) 12a. The earth and sand 7 is excavated to the depth or appropriately, and the locking portion (through hole) 12a is exposed by manual digging as necessary.

  Hook an appropriate coupling tool (hook chain or the like) 2a to the exposed locking portion (through hole) 12a, and lift up the seat body 11a with the excavating machine 3 or other machine (traveling machine or the like). The earth and sand 7 around the temporary piping 4 (particularly the upper covering portion) is removed, and the surface (upper surface portion) of the temporary piping 4 is exposed (FIG. 11).

  Accordingly, as in the first embodiment method, when removing the temporary pipe, the excavation groove 5 is basically mechanically excavated with only the necessary minimum earth and sand 7 without excavating almost all of the earth and sand 7 in the excavation groove 5. It is possible to take out the temporary piping 4 by removing it.

  Of course, the present invention is not limited to the first embodiment and the second embodiment described above, and when the temporary piping 4 is backfilled, the temporary piping 4 is covered with a sheet body, and the backfill earth and sand when the temporary piping is removed. As long as the removal can be carried out by lifting or lifting the sheet body, and the sheet body can realize the above, for example, a material having water permeability can be used as the material of the sheet body. The shape and structure are arbitrary.

1, 1a Sheet body 11, 11a Sheet body 12 Locking portion 12a Locking portion (through hole)
13 Armband 2 Connector 2a Connector (hook chain)
21 Interposer (hook chain)
DESCRIPTION OF SYMBOLS 3 Excavation machine 31 Action part 4 Temporary piping 5 Excavation groove 51 Bottom face 6 Corrugated ridge 7 Earth and sand 71 Crushed stone 72 Temporary pavement

Claims (4)

  In the temporary piping installation method in which the excavation groove for temporary piping installation is dug, temporary piping is arranged on the bottom surface of the excavation groove, and earth and sand are backfilled in the excavation groove, a long belt-like sheet having an appropriate width At the end of the main body, a sheet body provided with a pulling-up locking portion is attached to the temporary piping when the earth and sand are backfilled, and the surface of the temporary piping is exposed by raising or lifting the sheet main body. Temporary piping installation method, characterized by covering the temporary piping.   The temporary pipe installation method according to claim 1, wherein when the earth and sand are backfilled, the position of the locking portion is at least a height that is at least a depth capable of machine excavation of the backfilled earth and sand.   The temporary piping installation method according to claim 1 or 2, wherein the locking portion is provided at a distal end portion of an arm band portion attached to the seat body. The temporary piping installation method according to any one of claims 1 to 3 , wherein a part or all of the sheet main body has a net or other water-permeable structure.

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