JPH0452832B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a multi-pipe propulsion method for burying cable storage conduits in the ground.

(Prior art) Conventionally, when burying and forming this type of cable storage conduit in the ground, a large-diameter propulsion pipe is attached to the rear of an excavator with a cutter or the like at the tip. Push the propulsion tube from behind with a pushing device such as a jack to propel it into the soil, then insert the cable storage tube into the propulsion tube, and line the gap between the propulsion tube and the cable storage tube with an appropriate filler. I was putting a lot of effort into it.

(Problem to be solved by the invention) However, in this conventional construction method, a large-diameter propulsion pipe as a sheath pipe is first propelled and buried, then a cable storage pipe is inserted into the propulsion pipe, and then a filler is placed inside the propulsion pipe. These tasks had to be performed one after another, requiring appropriate machinery and equipment, and preparation for moving to the next task was time-consuming, requiring a great deal of effort, time, and money.

(Means for Solving the Problems) The present invention has been made in view of the above problems, and it is possible to directly bury and form a cable storage conduit without using the conventional propulsion pipe that serves as a sheath pipe. Furthermore, multiple pipelines can be buried at the same time without destroying the ground. Regarding the specific configuration of the present invention, a form hood with open ends at both ends for axially storing a cable storage pipe is provided on the same line as the shaft, outside the periphery of the shaft on the inside surface of the shaft. Further, on the rear end surface of this formwork hood, a lid body is provided which is slidable in the axial direction within the formwork hood by a pressing device such as a jack installed in the shaft.

A predetermined number of cable storage pipes are then delivered into this formwork hood and connected to the rear end of the excavator or other cable storage pipes that have already been propelled into the soil, and the lid is Seal the rear end of the formwork hood with your body,
A solidifying material is injected into the form hood to form a block that holds the cable storage tube within itself (this does not mean that it is completely enclosed). After that, each time the solidified block is propelled a certain distance from the formwork hood into the soil by the cover linked to the pressing device, along with the leading excavator, the same procedure is repeated. The storage pipes are delivered and connected, solidifying material is injected into the formwork hood, a block holding the cable storage pipes is added and formed, and this is pushed again with a pressing device to propel it.

(Function) When the rear end of the formwork hood is sealed with the lid, the front side is sealed with the rear end face of the already propelled block, and at this time the formwork hood becomes a closed room and is used as a formwork for forming blocks. Become. However, when the block to be propelled is first formed, its front side is the rear end of the excavator.

Thus, while the block is being propelled, excavated soil from the excavator is discharged rearward through a cable storage pipe held within the block.

Furthermore, if construction work is carried out with the connecting parts of the cable storage pipes located within the formwork hood, the connecting parts of the cable storage pipes will be located within the block.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. Fig. 1 shows a state where construction has progressed halfway, and 1 is an excavator having an excavator 2, and at the rear end of this excavator 1 there are cable storage pipes 3, 4,
A block 6 holding 5 is located. The cable storage pipe 3 is connected to an excavated soil discharge pipe 7 inside the excavator 1. Also located behind the block 6 is a block 11 which holds the cable storage tubes 8, 9, 10 therein. Each of these blocks 6, 11 has already been propelled into the ground from the shaft 12 according to this embodiment.

Reference numeral 13 denotes a substantially cylindrical formwork hood with both ends open, and a horizontal shaft 14 formed by the excavator 1.
The front opening is located at the periphery of the entrance. Behind this formwork hood 13 is a formwork hood 1
A main push jack 15 having a push ring 14 that is freely slidable in the axial direction within the shaft 12 is installed within the shaft 12.

Further, a solidifying material injection pipe 16 is provided on the lower surface of the formwork hood 13, and a solidifying material filling sensor 17 equipped with an air release mechanism is provided on the upper surface.

To explain the construction work that follows, first, the cable storage pipes 18, 19, 20 are installed in the formwork hood 1.
3, and connect them to the cable storage pipes 8, 9, and 10 that have already been propelled and should be connected, respectively. After that, operate the pusher jack 15 to slide the pusher ring 14 into the formwork hood 13, as shown in FIG. 2, and hold the rear ends of the cable storage tubes 18, 19, 20 in their recesses. At the same time, the rear opening of the formwork hood 13 is sealed. At this time, the front opening of the formwork hood 13 is sealed by the rear end wall of the block 11. Then, the solidifying material 21 is poured into the solidifying material injection pipe 16.
It is injected into the formwork hood 13 from there. In this embodiment, the solidifying material filling sensor 17 automatically stops the injection operation of the solidifying material 21 when the mold hood 13 is filled with the solidifying material 21 as shown in FIG.

When the solidification is completed, the solidifying material 21 that was filled in the gap between the formwork hood 13 and the cable storage pipes 18, 19, 20 is transferred to these storage pipes 18, 19, 20.
This constitutes a block 21' which holds 20 in it. Furthermore, as is clear from FIG. 3, in this embodiment, the ends of the cable storage pipes 8, 9, and 10 protrude from the rear end of the propelled block 11, and cables of the same shape and length Since the storage tubes 18, 19 and 20 have been connected, each connection will be located inside the finished block 21'. On the other hand, the cable storage tube 18,1
The rear ends of the cable storage pipes 18, 19, 20 are configured to protrude from the rear end of the block 21', and the protruding ends of the cable storage pipes 18, 19, 20 are connected to the push ring 14.
It is inserted into the recess.

Then, the work moves on to the propulsion work. In this embodiment, the push ring 14 also serves as a lid, and the push ring 14 is propelled by the main push jack 15, and the excavator 1 is moved while the excavator 2 is operated. As the cable storage pipes 18, 19, and 20 are excavated, the cable storage pipes 18, 19, and 20 are pushed into the ground together with the block 21'. Excavated soil from the excavator 1 during propulsion is discharged rearward from the excavated soil discharge pipe 7 via the cable storage pipes 3, 8, and 18.

Therefore, if the push ring 14 is propelled by a certain length, that is, the length of the block 21' in this embodiment,
is pulled back as shown in Figure 5. From then on, see Figures 1 to 5.
All you have to do is carry out the construction work in the same way as shown in the diagram.

(Effects of the Invention) According to the present invention, labor and time can be reduced compared to the conventional method of pushing large diameter pipes, and since the cable storage pipe is pushed in blocks, the ground does not collapse.

Also, there is no need for particularly large equipment or special equipment,
Conventional excavators and the like can also be used, and are highly practical.

[Brief explanation of the drawing]

Each figure is a diagram related to an embodiment, and FIGS. 1 to 5 are partially sectional side views showing the construction procedure of the embodiment, and FIG. 6 is a sectional view taken along the line A-A in FIG. 5. be. In addition, in the figure, 1 is an excavator, 2 is an excavation device, 3,
4, 5, 8, 9, 10, 18, 19, 20 are cable storage pipes, 6, 11, 21' are blocks, 7 is an excavated soil discharge pipe, 12 is a vertical shaft, 13 is a formwork hood, 14 15 is a push ring, 15 is a main push jack, 16 is a solidification material injection pipe, 17 is a solidification material filling sensor, and 21 is a solidification material.

Claims (1)

[Claims] 1. A formwork hood with open ends at both ends for storing cable storage pipes in the axial direction is provided on the outer side of the periphery of the horizontal shaft on the inside surface of the shaft, and on the rear end surface of the formwork hood, A lid is provided that can slide axially inside the formwork hood in conjunction with a pressing device installed in the shaft, and an appropriate number of cable storage pipes are delivered into this formwork hood and pushed into the soil. Connect the cable storage pipe to the rear end of the excavator or other cable storage pipe, seal the rear end of the formwork hood with the lid, and inject a solidifying material into the formwork hood to make the cable storage pipe itself. A block is formed to be held inside the cable, and each block is pushed out by a lid linked to a pushing device and propelled together with the leading excavator. After each block is propelled a certain distance, the lid is pulled back and the same procedure is repeated to store the cable. A multi-pipe propulsion method characterized by forming and propelling blocks that hold utility pipes.