JPH10121446A - Assembling method for corrugated pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the execution ability of a corrugated pipe by assembling the first block and joining each corrugated section to the first block, and assembling a pipe section and joining the downstream end of the first block onto the upstream end of the second block. SOLUTION: A plurality of bottom corrugated sections A is divided into a plurality of blocks, and the first block is first assembled. Next the first corrugated pipe section 2A is assembled by severally joining a plurality of right and left, and upper corrugated sections B, C, D in order from an upstream side to the first block. Next, the downstream end of the first block is raised, and piled up on the upstream end of the previously assembled second block and joined together. This process is repeated to consistently carry out the excavation of a ditch, the assembly of the corrugated pipe 2 and the back filling of the ditch in each of corrugated pipe sections 2A-2C. Thus the execution ability of the corrugated pipe 2 used for a waterway can be sharply improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling a corrugated pipe, and more particularly to a method of assembling a corrugated pipe which can greatly improve the workability of a corrugated pipe widely used for waterways. .

[0002]

2. Description of the Related Art A corrugated pipe is formed by sequentially assembling a plurality of corrugated sections in a pipe shape by bolting. The corrugated section is obtained by bending a corrugated sheet obtained by corrugating a steel plate into an arc shape in a direction perpendicular to the corrugating direction.

[0003] Corrugated pipes are classified into flexible pipes according to the so-called design method. Therefore, when buried in the soil, loads and reaction forces are distributed uniformly around the pipes, so that they have a large proof stress. Moreover, since it is lightweight and flexible, it has excellent economic efficiency such as easy handling and easy assembly. Furthermore, since it is hot-dip galvanized, it has an excellent anticorrosion effect.

[0004] Because of these various excellent features, corrugated pipes are widely used as waterways and passages that cross roads, railways, and below embankments.
About the method of assembling the conventional corrugated pipe for waterway,
This will be described with reference to the drawings.

FIG. 4 is a front view showing a corrugated pipe,
FIG. 5 is a schematic perspective view showing a conventional method for assembling a corrugated pipe, and FIG. 6 is a schematic developed view showing a conventional method for assembling a corrugated pipe. 5 and 6
In, the numbers indicate the order of connection of the corrugated sections.

As shown in FIG. 4, the corrugated pipe 1 has a plurality of bottom corrugated sections A,
It comprises a left corrugated section B, a right corrugated section C and an upper corrugated section D. In the bottom corrugated section A, the corrugated sections A1 and A1 at the downstream end and the upstream end are provided.
6 is half the width of the central corrugated sections A2 to A5. Similarly, in the upper corrugated section D, the width dimension of the upstream and downstream corrugated sections D9 and D22 is half the width dimension of the central corrugated sections D12, D15, D18 and D21. This is because the coupling line of each corrugated section is shifted by a pitch opposite to the axial direction of the corrugated pipe 1 in order to increase the coupling strength of the corrugated pipe 1.

First, a groove corresponding to the entire length of the bottom corrugated section A is dug at a place where the corrugated pipe 1 is assembled.
Next, the bottom corrugated section A is sequentially bolted into the groove dug in this order from 1 to 6 from the downstream side. The reason for the connection from the downstream side is that, in the developed view shown in FIG. 6, the end of the upstream corrugated section is overlapped with the end of the downstream corrugated section, and the water flowing through the corrugated pipe 1 flows through the end face (plate) of the corrugated section. (Corresponding to the thickness), thereby reducing the resistance of water.

Next, on both sides of the bottom corrugated section A, a left corrugated section B, a right corrugated section C and an upper corrugated section D are provided.
The bolts are sequentially connected according to the order shown in FIGS. These corrugated sections B, C and D are all connected from the upstream side. This is because, similarly to the case of the bottom corrugated section A, the water flowing in the corrugated pipe 1 is overlapped with the end of the upstream corrugated section on the end of the downstream corrugated section on the developed view shown in FIG. This is to prevent the end face of the section from being hit, thereby reducing water resistance.

When the corrugated pipe 1 is assembled in this way, the groove is filled back.

[0010]

However, in the above-mentioned conventional method of assembling a corrugated pipe, first, a groove corresponding to the entire length of the bottom corrugated section A is dug, and then the bottom corrugated section A is sequentially joined from the downstream side. After that, the left and right side parts B and C and the upper corrugated section D need to be joined in order from the upstream side. Therefore, excavation of the groove, assembly of the corrugated section and backfilling of the groove are performed for a predetermined length from one end of the corrugated pipe. For each corrugated pipe section, it takes more time to transport the materials than in the case of performing an integrated operation, and it is necessary to wastefully carry in and out the earth and sand that has come out when excavating the trench.

Accordingly, it is an object of the present invention to provide a method of assembling a corrugated pipe which can greatly improve the workability of a corrugated pipe widely used for waterways.

[0012]

According to the first aspect of the present invention,
A plurality of bottom corrugated sections, left corrugated sections, right corrugated sections and upper corrugated sections, each formed by bending a corrugated sheet into an arc shape in a direction perpendicular to the corrugating direction, on a development view In the method of assembling a corrugated pipe, which is sequentially bolted so that the end of the upstream corrugated section overlaps the end of the downstream corrugated section, the plurality of bottom corrugated sections are divided into a plurality of Divided into multiple blocks consisting of a bottom corrugated section,
First, a first block is assembled, and then a plurality of the left corrugated sections, the right corrugated sections and the upper corrugated sections are connected to the first block in order from the upstream side to form a first corrugated pipe. Assembling the section, then lifting the downstream end of the first block upward, joining the downstream end of the first block over the upstream end of the pre-assembled second block, and A plurality of the left corrugated sections, the right corrugated sections, and the upper corrugated sections are sequentially coupled to the block from the upstream side, and
The present invention is characterized in that a corrugated pipe including a plurality of corrugated pipe sections is assembled by repeatedly assembling a corrugated pipe section.

[0013] The invention according to claim 2 is characterized in that the corrugated pipe section has one left corrugated section and one right corrugated section in the circumferential direction. .

According to a third aspect of the present invention, the downstream end of the first block is pulled upward by pulling a wire stretched between the left side corrugated section and the right side corrugated section and the downstream end of the block. It is characterized by being lifted.

[0015]

Next, an embodiment of a method for assembling a corrugated pipe according to the present invention will be described with reference to the drawings.

FIG. 1 is a developed view showing an embodiment of a method of assembling a corrugated pipe according to the present invention, and FIG. 2 is a schematic front view showing a method of lifting a downstream end of a first block upward in the present invention. is there. 1 and 2, the numbers indicate the order of connection of the corrugated sections.

According to the present invention, a plurality of bottom corrugated sections A, left corrugated sections B, and right corrugated sections are formed by bending a corrugated sheet in an arc shape in a direction perpendicular to the corrugating direction. C and upper corrugated section D
1 is a method of assembling a corrugated pipe 2 which is sequentially bolted so that an end of an upstream corrugated section overlaps an end of a downstream corrugated section on a developed view shown in FIG. is there. The reason for assembling the upstream corrugated section so that the end of the upstream corrugated section overlaps the end of the downstream corrugated section is to prevent the water flowing in the corrugated pipe 1 from hitting the end face of the corrugated section, and This is to reduce the resistance of the device.

According to the method of the present invention, a plurality of bottom corrugated sections A are replaced with a plurality of blocks (a), (b), (c) composed of a plurality of bottom corrugated sections.
First, the first block (a) is assembled according to the sequence shown in FIG.

Next, on both sides of the first block (a), a plurality of left corrugated sections B, right corrugated sections C and upper corrugated sections D are sequentially bolted from the upstream side to form a first corrugated pipe. Assemble Section 2A.

Next, the downstream end of the first block (a) is lifted upward, and the downstream end of the first block (a) is overlapped with the upstream end of the previously assembled second block (b) by bolting. I do. Similarly to the first block (a), the second block (b) is assembled so that the end of the upstream corrugated section overlaps the end of the downstream corrugated section. To raise the downstream end of the first block (a) upward, a wire 3 stretched between the left side corrugated section B and the right side corrugated section C and the downstream end of the first block (a) is winch 4 or the like. Pulling or lifting the downstream end of the first block (a) with a heavy machine such as a back horn.

A plurality of left corrugated sections B, right corrugated sections C, and upper corrugated sections D are respectively bolted to both sides of the second block (b) sequentially from the upstream side to form a second corrugated pipe. Assemble section 2B. Also in this case, the assembly is performed so that the end of the upstream corrugated section overlaps the end of the downstream corrugated section.

By repeating these steps, a plurality of corrugated pipe sections 2A, 2B, 2C
Is assembled. Thus, according to the method of the present invention, unlike the conventional method, it is not necessary to first connect the bottom corrugated section A in the groove over the entire length, and for each corrugated pipe section of a predetermined length, Corrugated pipe 2 from upstream
Can be assembled. That is, excavation of the groove, assembling of the corrugated pipe 2 and backfilling of the groove can be performed in an integrated manner for each corrugated pipe section. Moreover,
There is no need to wastefully carry in and out the earth and sand that came out during the excavation of the trench. Therefore, the workability of the corrugated pipe widely used for waterways can be greatly improved.

In the above example, as shown in FIG. 4, the corrugated pipe section has one left corrugated section B and one right corrugated section C in its circumferential direction. There is
As shown in FIG. 3, the corrugated pipe section may have two left corrugated sections B1 and B2 and two right corrugated sections C1 and C2 in the circumferential direction. .

[0024]

As described above, according to the method of the present invention, a plurality of bottom corrugated sections are divided into a plurality of blocks each composed of a plurality of bottom corrugated sections, and the first block is first assembled. Then, a plurality of left, right and upper corrugated sections are sequentially joined to the first block from the upstream side to assemble the first corrugated pipe section, and then the downstream end of the first block is lifted upward. Drilling of grooves, assembling corrugated pipes and backfilling of grooves by integrating the downstream end of the first block onto the upstream end of the pre-assembled second block in an integrated manner for each corrugated pipe section Can be done with Therefore, an industrially useful effect such that the workability of a corrugated pipe widely used for waterways can be greatly improved is brought about.

[Brief description of the drawings]

FIG. 1 is a development view showing one embodiment of a method for assembling a corrugated pipe according to the present invention.

FIG. 2 is a schematic front view showing a method of lifting a downstream end of a first block upward in the present invention.

FIG. 3 is a front view showing a corrugated pipe including a corrugated pipe section having two left corrugated sections and two right corrugated sections in a circumferential direction thereof.

FIG. 4 is a front view showing a corrugated pipe.

FIG. 5 is a schematic perspective view showing a conventional corrugated pipe assembling method.

FIG. 6 is a schematic development view showing a conventional corrugated pipe assembling method.

[Explanation of symbols]

 A: bottom corrugated section B: left corrugated section C: right corrugated section D: upper corrugated section (a): block (b): block (c): block 1: corrugated pipe 2: corrugated pipe 2A: first corrugated Pipe section 2B: 2nd corrugated pipe section 3: Wire 4: Winch

Claims (3)

[Claims] 1. A plurality of bottom corrugated sections, left corrugated sections, right corrugated sections, and upper corrugated sections formed by bending a corrugated sheet into an arc shape in a direction perpendicular to the corrugating direction. In an assembling method of a corrugated pipe, the bottom corrugated sections are sequentially connected by bolts such that an end of an upstream corrugated section overlaps an end of a downstream corrugated section on a developed view. Is divided into a plurality of blocks consisting of a plurality of bottom corrugated sections, a first block is first assembled, and then, in the first block, a plurality of the left corrugated sections, the right corrugated sections and The upper part The gate sections are sequentially joined from the upstream side to assemble the first corrugated pipe section, and then the lower end of the first block is lifted upwards so that the first corrugated pipe section is placed on the upstream end of the pre-assembled second block. The downstream ends of the blocks are overlapped and joined, and the second
A plurality of the left corrugated sections, the right corrugated sections and the upper corrugated sections are sequentially joined to the block from the upstream side in order from the upstream side to repeatedly assemble the second corrugated pipe section. A method for assembling a corrugated pipe, comprising assembling a corrugated pipe comprising a corrugated pipe section. 2. The corrugated pipe section according to claim 1, wherein the corrugated pipe section has one left corrugated section and one right corrugated section in the circumferential direction. How to assemble. 3. The downstream end of the first block is lifted upward by pulling a wire stretched between the left and right corrugated sections and the downstream end of the block. The method for assembling a corrugated pipe according to claim 1 or 2, wherein the corrugated pipe is assembled.