JPH03176596A - Press-in of pipe in jacking method - Google Patents

Abstract

PURPOSE:To greatly shorten the working period by fixing a consolidated lead plate to the inside at the front end of a lead pipe, thrusting and propelling the pipes into the earth with a traction wire inserted into the lead pipe and by discharging surplus soil with the wire inserted through each of unit pipes. CONSTITUTION:A ram shoe 2 is welded to the front end of a lead pipe 1 with a consolidated lead plate 3 fixed to the inside of the ram shoe 2, and a pull-out hole 4 is bored to the rear part of the ram shoe and a traction wire 5 is connected therewith. The lead pipe 1 is lowered into a starting shaft 6 and is thrusted into the earth with a propulsion machine 7. Then a plurality of unit pipes 8 are welded one after another and are thrusted into the earth. After the front end of the pipe penetrates the earth and arrives in an arrival shaft 9, the ram shoe 2 is cut out. Then an attachment 10 for earthfall prevention is attached to the traction wire 5 that is inserted through the pipes, and the wire is drawn with a winch 11. Surplus soil is then discharged with a ring- shaped attachment 10a. Thereby works for discharge of soil after thrusting of the pipes 8 becomes easy.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a reinforced concrete pipe serving as the main body of a structural object;
Strike or jack steel pipes, cast iron pipes, etc. from the starting shaft.
This invention relates to a method for press-fitting pipes in a propulsion construction method in which the pipes are press-fitted and buried using thrust.

[Conventional technology]

Many methods are known for propulsion construction of small-diameter pipes where manual work is not possible inside the pipes.Among them, the press-in type impact propulsion method involves press-fitting unit pipes from a starting shaft and sequentially welding and connecting the unit pipes. The pipe is compacted and buried in the ground, and after reaching the reaching shaft, the earth is removed from inside the pipe, or the earth is removed during the burial process. The soil removal work is mainly done using high-pressure jet water depending on the soil quality.

As another method of removing soil, after penetrating the pipe from the starting shaft to the reaching shaft, as shown in FIG. Incorporate dirt and boulders into the packet 14,
The operation of moving the discharge packet 14 backward, discharging it through the starting shaft, and reinserting it into the pipe is repeated many times to discharge soil.

[Problem to be solved by the invention]

As described above, since the earth removal work is performed using high-pressure jet water, it is discharged as muddy water, which is extremely troublesome to dispose of, and furthermore, it scatters into the shaft where the work is being performed, resulting in a poor working environment. In addition, when discharging soil using the above-mentioned waste discharging packet, it is necessary to move the packet back and forth many times, and there is a drawback that the soil discharging operation takes time.

The present invention was developed to solve the above problems, and is a propulsion method that allows preparations for earth removal to be carried out already at the stage of press-fitting, so that the earth removal work after press-fitting the pipe can be easily carried out. The purpose of this project is to establish a method for press-fitting pipes.

[Means to solve the problem]

The solution according to the present invention is to provide a consolidation leading plate at the tip of the leading pipe, and attaching a traction line to the consolidation leading plate,
The purpose is to press-fit the traction wire into the following pipe while passing it through.

[For production]

By the method described above, since the traction wire is inserted into the pipe at the same time as the pipe is press-fitted, the soil inside the pipe can be discharged using the thread.

[Example] To specifically explain the present invention, as shown in FIGS. 1 to 3, a ram shoe 2 is welded to the tip of a leading pipe 1, and a consolidation leading plate 3 is placed inside the ram shoe 2 in the diametrical direction. It will stick for a long time. The leading end of the consolidation guide plate 3 is formed into a tapered shape, and a punching hole 4 is formed at the rear thereof, and a pulling string 5 such as a wire rope is tied to the punching hole 4. Therefore, as shown in FIG. 4, the leading pipe 1 is lowered into the starting shaft 6, and the leading pipe 1 is pressed into the soil with a pressure that is weak at first but then gradually stronger by a propulsion device 7 that drives impact or jack thrust. Next, a plurality of unit tubes 8 having the same diameter as the leading tube 1 are sequentially welded in the tube axis direction, and the traction wire 5 is inserted into each tube 8, but each time one unit tube 8 is welded, It is press-fitted by the propulsion device 7. After the tip of the leading pipe 1 penetrates the reaching shaft 9 as shown in FIG. 5, the portion of the leading pipe 1 to which the ram shoe 2 including the consolidation leading plate 3 is attached is cut out. At this time, the traction wire 5 is passed through the tube.

If the soil is hard, the ram shoe 2 is attached as described above, but if the soil is soft, the ram shoe 2 is not necessary, and therefore the consolidation guide plate 3 can be attached directly to the inner surface of the tip of the guide pipe 1. Furthermore, the connection of each unit pipe 8 is not limited to welding, but may also be done by screwing.

Since the traction wire 5 is inserted into the pipe that has been press-fitted as described above, the attachment 10 for landslides shown in FIG. Installation, start shaft 6 as shown in Figure 6 (A)
The towing line 5 is pulled by a winch 11 on the side. At this time, a wire 12 such as a wire rope for pulling back is attached to the attachment 10. The attachment 10 for landslides is inserted a plurality of times, changing from a small diameter one to a larger diameter one in stages. Finally, as shown in FIGS. 7A and 7B, a ring-shaped attachment 10a is attached and pulled to remove the remaining soil. Thereafter, when inserting the main pipe into the pipe that has been press-fitted into the light, it is sufficient to use the above-mentioned traction wire 5 to insert the main pipe.

Furthermore, when collapsing the earth and sand, a water jet device 13 may be used as shown by the two-dot chain line in FIG. 6(A).
In this case, unlike the conventional method, the nozzle does not require jet power for propulsion, and the jet is only used to break up the earth and sand.
There is no risk of deteriorating the working environment like in the past.

〔Effect of the invention〕

The pipe press-fitting method in the propulsion method according to the present invention includes providing a consolidation leading plate on the leading pipe, attaching a traction line to the consolidation leading plate, and press-fitting the traction line while inserting it into the container pipe following the leading pipe. Since the traction wire is inserted through the entire length of the pipe press-fitted from the starting shaft to the arrival shaft, the traction wire can be used to carry out the evacuation work. The period can be greatly shortened and at the same time a good working environment can be maintained. Moreover, there are times when the machine cannot be propelled during propulsion work, but in this case, the traction wire can be used to pull back the press-fitted tube.

Further, since the traction line is attached to the consolidation leading plate, and the tip of the consolidation leading plate is tapered, meandering of the press-fit pipe can be prevented.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the structure of a leading pipe used in the pipe press-fitting method in the propulsion method of the present invention, Fig. 2 is a front view, and Fig. 3 is a sectional view taken along the line ■-■ in Fig. 1. , Figure 4,
Figures 5, 6 (A), and 7 (A) are cross-sectional views showing the pipe press-in method and evacuation work in the propulsion method according to the present invention;
6(B) and 7(B) are front views of the attachment, and FIG. 8 is a perspective view showing an example of a conventional earth removal method. 1... Leading pipe 2... Ram shoe 3... Consolidation leading plate 5... Traction line 6... Starting shaft 7...
Propulsion machine 8... Pipe following the leading pipe 9... Reaching shaft 10.10a... Attachment Fig. Fig. Fig.

Claims (1)

[Claims] 1. A consolidation guide plate (3) with a tapered tip is fixed to the inner surface of the tip of the guide tube (1) in the diametrical direction of the guide tube (1), and a traction device attached to the consolidation guide plate (3) striae (5
) into the leading pipe (1) and pushing it into the leading pipe (1).
) A pipe press-fitting method in a propulsion construction method characterized by sequentially inserting the traction wire (5) into each subsequent unit pipe (8)