JPH06189436A - Method of burying pipe - Google Patents

Abstract

PURPOSE:To implement a method of burying a pipe capable of reducing the work period by adopting a method of reinforcing the circumference of the pipe in which no transverse hole other than the transverse hole for burying the pipe is necessary. CONSTITUTION:In a condition that an inner pipe 14 is inserted into an outer pipe 11 having a plurality of through-hole parts 12 in the sidewall, the outer pipe 11 and inner pipe 14 are buried in the ground G. In this condition, while the gap 15 between the pipes 11, 14 is filled with concrete 20, the concrete 20 is set in a condition that a part of the concrete 20 flows to the outside via the through-hole parts 12 in the outer pipe 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for burying a pipe in the ground, and more particularly to a method for reinforcing a pipe periphery.

[0002]

2. Description of the Related Art When a cable or the like is buried in the ground, a pipe 2 buried in the ground G is used as shown in FIG.
The method of using 1 is common. Where the pipe 21
For the purpose of preventing the occurrence of accidents such as ground subsidence due to the decrease in the strength of the surrounding area, a plurality of small holes 22 are formed around the embedded pipe 21 to improve fluidity. A method of filling the solidified material 23 (reinforcing material) or the like and then solidifying it to reinforce the periphery of the pipe 21 is adopted.

[0003]

However, in the conventional embedding method, it is necessary to form the lateral hole 24 for burying the pipe 21, and in addition, the small hole 22 for filling the solidified material 23 is formed. Since it is necessary, there is a problem that the construction period will take a long time.

In view of the above problems, the object of the present invention is to
Without forming a horizontal hole other than the horizontal hole in which the pipe is embedded,
It is to realize a pipe burying method that can shorten the construction period by taking reinforcement measures around the pipe.

[0005]

Means for Solving the Problems In order to solve the above-mentioned problems, the means taken in the pipe burying method according to the present invention is as follows. The step of horizontally embedding the outer pipe and the inner pipe in the ground while inserting the inner pipe through the predetermined gap, and filling the gap with a fluid reinforcement material The step of flowing out of the inside of the gap to the outside of the outer pipe through the penetrating portion and the step of solidifying the reinforcing material are performed.

[0006]

In the pipe burying method according to the present invention, first, the outer pipe and the inner pipe are grounded in a state where the inner pipe is inserted inside the outer pipe having a plurality of penetrating portions in the side wall with a predetermined gap. And fill the gap between these outer pipe and inner pipe with a fluid reinforcing material, and at the same time, fill a part of the reinforcement material from the gap through the penetrating part of the outer pipe. Let it flow out.

When the reinforcing material is solidified in this state, the inner pipe is reinforced by the reinforcing material filled between the inner pipe and the outer pipe, and the outer pipe is reinforced by the reinforcing material flowing out from the through hole. The peripheries of these pipes are strongly reinforced and ready to withstand earth pressure. Here, the lateral hole required to embed the pipe in a reinforced state is one lateral hole for embedding the outer pipe and the inner pipe, so that the construction period can be shortened.

[0008]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an explanatory view showing the condition of an outer pipe and an inner pipe buried in the ground in the pipe embedding method of this embodiment, FIG. 2 is a sectional view showing the condition, and FIG. 3 is a reinforcement of the periphery thereof. It is sectional drawing which shows the state after reinforced with a material (concrete).

Before describing the pipe burying method of this example, the structures of the outer pipe and the inner pipe used in this method will be described.

First, in FIGS. 1 and 2, the outer pipe 11 has a plurality of penetrating portions 12 on its side wall and has an outer diameter of 35.
A 0φ steel pipe (perforated pile),
On its side surface portion, there is provided a concrete supply portion 13 that is in communication with the inside of the pipe and that can supply the concrete 20 from the opening portion toward the inside of the pipe. Meanwhile, the inner pipe 14
Is a steel pipe having an outer diameter smaller than the inner diameter of the outer pipe 11, for example, an outer diameter of 310φ, and a cable or the like is inserted into the pipe when it is buried in the ground. It These outer pipe 11 and inner pipe 14 have a width of about 20 inside the outer pipe 11.
After being embedded horizontally in the ground G with the inner pipe 14 inserted through the gap 15 of mm, the gaps 15 are filled with concrete 20, so that the both ends of the gap 15 are closed to the outside. A ring-shaped lid member 16 can be attached to both end surfaces of the pipe 11. Here, the lid member 16 has the opening 1 corresponding to the opening diameter of the inner pipe 14.
6a is provided, and even if it is attached to the end face of the outer pipe 11, both ends of the inner pipe 14 are kept in the open state. Here, the lid member 16 and the outer pipe 1
For the attachment with 1, a structure in which the small diameter portion 11a formed on the end edge of the outer pipe 11 is covered with the lid member 16 can be adopted. In order to secure the gap 15 between the outer pipe 11 and the inner pipe 14, the inner pipe 14 is inserted inside the outer pipe 11 with the ring-shaped spacers 17 attached to both ends thereof. .

A pipe burying method using the outer pipe 11 and the inner pipe 14 having the above-described structure will be described.

First, as shown in FIGS. 1 and 2, after forming a lateral hole 18 having a size capable of embedding the outer pipe 11 in the horizontal direction in the ground G, the outer pipe 11 is fitted into the lateral hole 18. Embed. Next, with respect to the inside of the outer pipe 11, the inner pipe 1 with the spacer 17 attached
Pass 4. In this state, the outer pipe 11 and the inner pipe 1
A gap 15 for filling a reinforcing material such as concrete is formed between the spacer 4 and the spacer 4. Next, the lid members 16 are attached to both ends of the outer pipe 11 to close both sides of the gap 15. Here, the outer pipe 11 is arranged, for example, in a state where the opening of the concrete supply unit 13 faces upward so that the concrete 20 can be supplied from the ground surface. The concrete supply unit 13 can be detachable from the outer pipe 11 and can be detached after the concrete 20 is filled in the gap 15. Further, as the concrete supply unit 13, it is possible to use a vertical hole or the like formed from the ground instead of the length reaching the ground.

Here, instead of the method of sequentially installing the outer pipe 11 and the inner pipe 14 in the lateral hole 18 as described above, a spacer is previously provided on the ground on the inside of the outer pipe 11. Adopting a method of passing the inner pipe 14 to which 17 is attached and closing both sides of the gap 15 with the lid member 16 and then passing the outer pipe 11 and the inner pipe 14 together into the lateral hole 18. You can also

Next, as shown in FIGS. 2 and 3, fluid concrete 20 is placed inside the gap 15 formed between the outer pipe 11 and the inner pipe 14 through the concrete supply port 13. Fill as a reinforcing material. Here, when the concrete 20 is pumped to fill the inside of the gap 15 with the concrete 20, the filling pressure causes the concrete 20 to flow from the gap 15 to the outer pipe 11.
It will be in the state of having flowed out to the outside through the penetrating portion 12.

Next, the concrete 20 is solidified.

As a result, the inner pipe 14 is reinforced by the concrete 20 filled in the gap 15 between the inner pipe 14 and the outer pipe 11, and the outer pipe 11 is reinforced by the concrete 20 flowing out from the through portion 12. Since the inner pipe 14 and the outer pipe 11 are strongly reinforced around the inner pipe 14 and can withstand the earth pressure, an accident such as ground subsidence does not occur.

As described above, in the pipe embedding method of this embodiment, the lateral holes required to embed the inner pipe 14 and the outer pipe 11 in a reinforced state are the outer pipe 11
It is only necessary to form one lateral hole 18 having a size capable of embedding Moreover, the concrete 20 may be poured only into the gap 15. Therefore, it is possible to shorten the construction period required for embedding the reinforcing pipe.

Here, the outer pipe 11 itself is connected to the lateral hole 18
It may be a pipe for passing a device of an excavating device used when forming the. That is, as shown in FIG.
The bit 32 of the device 31 of the excavator 30 is inserted into the outer pipe 11 in a non-excavated state (reduced diameter state) and the bit 32 is inserted.
While the bit 32 is projected from the tip of the outer pipe 11, the bit 32 is rotated in a predetermined direction to bring the bit 32 into an excavated state, and the outer diameter of the rotation trajectory of the bit 32 is expanded as shown by the dotted line in FIG. Diameter. In this state, the outer pipe 11 is moved forward to dig a lateral hole to form the lateral hole 18 while excavating the device 31 with a rotating force and a striking force. After that, the outer pipe 11 is left in the lateral hole 18 and the excavator 30
May be pulled out from the inside of the outer pipe 11 and the inner pipe 14 may be inserted inside thereof.

The outer pipe 11 and the inner pipe 1
In the structure of No. 4, reinforcing ribs or guide grooves for concrete may be formed on the side surface.

[0021]

As described above, in the pipe burying method according to the present invention, the outer pipe and the inner pipe having a plurality of penetrating portions in the side wall are buried in the ground, and the gap between these pipes is provided. On the other hand, it is characterized by filling the reinforcing material having fluidity and solidifying the reinforcing material in a state where a part of the reinforcing material flows out through the penetrating portion of the outer pipe. Therefore, according to the present invention, the inner pipe is reinforced with the reinforcing material filled between the inner pipe and the outer pipe, and
The outer pipe is reinforced by the reinforcing material flowing out from the through hole. For this reason, the surroundings of the inner pipe and the outer pipe are in a state capable of counteracting the earth pressure, so that ground subsidence or the like can be prevented. Here, the lateral hole formed in the ground may be one lateral hole in which the outer pipe can be embedded, so that the construction period can be shortened.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a state of an outer pipe and an inner pipe embedded in the ground in a pipe burying method according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the outer pipe and the inner pipe in the state shown in FIG.

3 is a cross-sectional view showing a state after the outer pipe and the inner pipe shown in FIG. 1 are reinforced with concrete.

4 is an explanatory view showing a state in which a lateral hole is formed by an excavating device using the outer pipe shown in FIG.

FIG. 5 is an explanatory view showing a conventional pipe burying method.

[Explanation of symbols]

 11 ... Outer pipe 12 ... Penetration part 13 ... Concrete supply part 14 ... Inner pipe 15 ... Gap 16 ... Lid material 16a ... Opening part 17 ... Spacer 18 ...・ Horizontal hole 20: concrete

Claims (1)

[Claims] 1. An outer pipe having a plurality of penetrating portions on a side wall thereof, and the inner pipe being inserted into the inner wall of the outer pipe with a predetermined gap from the inner wall of the outer pipe. And filling the gap with a reinforcing material having fluidity, and causing a part of the reinforcing material to flow out of the outer pipe through the penetrating portion from the inside of the gap; A method for burying a pipe, comprising: a step of solidifying the material.