JP3227115B2 - Propulsion box support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supporting device for supporting a buried culvert after completion of propulsion in a submerged propulsion method for propelling and burying a culvert across a water bottom of a river or a canal. is there.

[0002]

2. Description of the Related Art A method of constructing a pipeline on the bottom of a river or a canal is generally a submerged construction method in which a culvert divided into predetermined lengths is transported to a site by a ship or the like, and is successively submerged and connected to the bottom. Was often adopted. However, in this method, most of the installation and connection work of the culvert is underwater work by input, and there is a problem in workability and safety. For this reason, a starting shaft is built on land adjacent to rivers, etc., and the starting shaft is closed with multiple steps of partition walls to form a plurality of spaces, and each space is pumped up to dry the rear space. By using this space as a starting base, a method has been developed in which the propulsion culvert is sequentially buried under the water. The propulsion hood is divided into predetermined lengths, transported and installed, tensioned by PC steel or the like in the starting shaft, integrated in the propulsion direction, and improves the water stoppage of the joint. in this way,
Since almost no underwater work is required, workability and safety are significantly improved.

[0003]

With the development of the water bottom propulsion method described above, it has become possible to carry out the construction safely and efficiently by the usual propulsion technique for laying a culvert across a water bottom such as a river or a canal. However, in general, the soil at the bottom of the water, such as rivers and canals, is often composed of soft soil such as corroded soil and sedimentary soil. . Since each box is tightly integrated in the direction of propulsion with PC steel, etc., the box does not sink unequally, but the box is loosened and functions as a structure. It will cause trouble. Further, if the loosening of the box is promoted, there arises a problem of water stoppage due to the opening of the joint portion of the box and a problem of causing cracking of the box body.

[0004] For this reason, the present invention provides a support device for a propulsion culvert in which a column buried by a submarine propulsion method does not cause sinking or loosening.

[0005]

That is, according to the present invention, there is provided a hollow pipe having a predetermined length and one end provided with a blind lid having an injection hole and the other end opened, and an axial direction inside the pipe. A sliding pipe having a through-hole drilled at one or more locations and slidably installed so as to be inscribed in the inner wall;
This is a supporting device for a propulsion hood in which supporting piles composed of fixed ridges are fixed on both sides of the propulsion hood at regular intervals.

As the hollow pipe, a relatively strong steel material is used to support the culvert. Since the hollow pipe is installed in water, it is important to use a material that does not corrode. The length of the hollow pipe is determined in consideration of soil conditions and the size of the culvert.

[0007] The sliding pipe has a length slightly shorter than the length of the hollow pipe and is manufactured so as to be inscribed in the inner surface of the hollow pipe. The through hole formed in the sliding pipe has a relatively small diameter so that the solution can be injected from the injection hole at a high pressure. The number of perforations depends on the cross section of the sliding pipe, but when the cross section is small, it can be located at one place in the center. Can form a hole.

[0008] The support pile constructed as described above is fixed to the outer wall portions on both side surfaces of the propulsion box. The number of supporting piles may be one on each side or one pair on both sides, depending on the size of the cross section and soil conditions. In addition, by using together the technique of fastening the propulsion hood with a PC steel material or the like, it is possible to install several propulsion hoods on which the support piles are disposed.

By attaching a simple sealing material to the head of the sliding pipe, it is possible to prevent water leakage from a gap between the hollow pipe and the sliding pipe, and to efficiently spray and slide through the through hole. The moving pipe can be pressed.

[0010] With the support device of the propulsion box according to the present invention, after the completion of submerged propulsion, high pressure water is injected from the injection hole from the inside of the box to pressurize the head of the sliding pipe and to apply pressure from the tip of the through hole. The ground is cut by injecting high-pressure water. The sliding pipe is efficiently penetrated into the ground by cutting the ground by high-pressure water injection and pressurizing the sliding pipe. When the penetration of the predetermined sliding pipe is completed, the filler is injected into the hollow pipe and the gap between the head of the sliding pipe and the through hole from the injection hole, and the support pile is fixed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view illustrating a support device for a propulsion box according to the present invention. The propulsion box 1 is generally divided into a predetermined length and manufactured at a factory or the like. Tightening holes 5 are provided in the corners of the propulsion hood 1 in the axial direction, and each of the propulsion hoods 1 is tied to each of the propulsion hoods 1 by a PC steel material according to the cross-sectional shape. Support piles 2 each having a predetermined length are embedded on both sides of the propulsion box 1. The tip of the support pile 2 is fixed so as to be the same as the bottom surface of the propulsion box 1. The supporting pile 2 has a configuration in which a blind lid 10 provided with an injection hole 9 is provided at one end, and a sliding pipe 4 is inserted into a hollow pipe 3 which is open at the other end. The injection hole 9 provided at the top of the hollow pipe 3 has:
The injection hose 6 is connected and is extended and installed inside the propulsion vessel 1.

FIG. 2 is a sectional view illustrating a support pile according to the present invention. The supporting pile 2 has a blind lid 1 provided with an injection hole 9 at the top.
0 is attached and the lower end is in the open hollow pipe 3,
Sliding pipe 4 having through holes 7 drilled at four locations in the axial direction
Is inserted. The sliding pipe 9 is slightly shorter than the length of the hollow pipe 3 and is slidably inscribed in the hollow pipe 3. A simple sealing material 8 is installed at the head of the sliding pipe 4 so that the hollow pipe 3 and the sliding pipe 4
To prevent water leakage from gaps.

In this embodiment, four through holes 7 are formed in the sliding pipe 4. However, the number of through holes 7 may be one or a plurality of depending on the cross section of the support pile 2. The length of the support pile 2 is determined according to the soil conditions and the size of the propulsion box 1.

FIG. 3 is a side view for explaining the state of support of the propulsion box. A pair of slant piles 2 extending downward are fixed on the side surface of the propulsion box 1 and the sliding pipe 4 is pressed downward by high-pressure water injected from an injection hole 9 after completion of propulsion.

Depending on the cross section of the propulsion box 1 and soil conditions, the number of the fixed support piles 2 may be one on each side or a plurality of the support piles. Further, the distance between the propulsion box 1 where the support pile 2 is fixed and the number of the support piles 2 and the soil condition,
Determined in consideration of the cross section.

Next, a method of installing the support device of the present invention will be described. When the construction of the underwater propulsion is completed, a high-pressure water injection device (not shown) is carried into the propulsion box 1 from the shaft, and high-pressure water W is injected into the injection hose 6. High pressure water W
Enters the hollow pipe 3 through the injection hole 9, pressurizes the head of the sliding pipe 4, and injects high-pressure water W at the tip through the through hole 7 provided in the sliding pipe 4. Through hole 7
The sliding pipe 4 penetrates into the ground G by cutting the ground G with the high-pressure water W injected from the tip of the sliding pipe 4 and pressurizing the sliding pipe 4. When the penetration of the sliding pipe 4 is completed to a predetermined depth, the filler is injected from the injection hole 9 and the hollow pipe 3 is filled.
Then, the gap at the head of the sliding pipe 4 and the through hole 7 are filled, and the ground G at the tip of the sliding pipe 4 is further consolidated. As the filler, a cement-based or resin-based material is used, and is determined in consideration of soil conditions and the like.

[0017]

According to the supporting device for a propulsion culvert according to the present invention, it is possible to easily and efficiently penetrate a supporting pile after completion of propulsion burial even with soft soil at the bottom of the water, and to sink a propulsion support line constructed on the water bottom. And loosening can be reliably prevented. In addition, by using a technique for binding the propulsion box, the distance between the supporting devices installed on the propulsion box can be increased, which is economical.

[0018]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a supporting device for a propulsion box according to the present invention.

FIG. 2 is a sectional view illustrating a support pile according to the present invention.

FIG. 3 is a side view for explaining the support situation of the propulsion hood.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Propulsion box 2 Support pile 3 Hollow pipe 4 Sliding pipe 5 Tightening hole 6 Injection hose 7 Through hole 8 Sealing material 9 Injection hole 10 Blind lid 11 Filling material

Claims (1)

(57) [Claims] In a submersible pontoon supporting apparatus for a water bottom propulsion method, in which a propulsion canal is buried under a water bottom by sequentially connecting a canal in a starting shaft, one end of which has an injection hole at one end. A hollow pipe provided with a blind lid, the other end of which is open, and a slide which is provided inside the pipe and has a through hole formed at one or more locations in the axial direction so as to be slidably inscribed on the inner wall. A support device for a propulsion culvert, comprising a support pipe composed of a moving pipe and fixed on both sides of a propulsion hood at a fixed interval.