JPH0762975A - Horizontal hole drilling method, pipe member and pipe body used therefor - Google Patents

Abstract

PURPOSE:To smoothly advance a pipe body by circularly drilling multiple lubricant guide holes on the outer periphery of a sewer pipe or the like buried by the jacking method, and injecting a lubricant between the ground and a pipe body to reduce friction at the time of an advance. CONSTITUTION:A sewer pipe 3 made of a concrete pipe member is pushed and advanced by a hydraulic jack 4 or the like installed in a vertical shaft 1, and the sewer pipes 3 are connected and buried in sequence. Multiple lubricant guide holes 7 are circularly drilled on the outer peripheries of the sewer pipe 3 and a joint pipe body 6, and check valves are provided on the guide holes 7. When the sewer pipe 3 is advanced into the ground, a lubricant is injected to the outer face of the sewer pipe 3 from the guide holes 7 with a quantitative pump or the like to reduce the friction force between the sewer pipe 3 and the ground. The advance can be made smoothly and efficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal hole drilling method used when burying a sewer pipe or the like, and a pipe member and a pipe body used in the method.

[0002]

2. Description of the Related Art Conventionally, the following construction method has been used as a construction method for burying a sewer pipe in the ground.

First, a standing pipe 1 is drilled, and a pipe member 3 made of concrete is provided with a digging portion 2 at the tip from the peripheral wall of the standing pile 1.
Is pushed by, for example, a hydraulic jack, the ground is excavated by the thrust of the excavating portion 2 and the hydraulic jack, and the earth and sand generated by the excavation are discharged through the pipe member 3 (actually, the earth and sand are discharged through a pipe arranged in the pipe member 3). (Or it is discharged as muddy water by adding water.), And a pipe member 3 made of concrete is sequentially added to form a lateral hole in which the pipe member 3 having a predetermined length is buried. (The same components as those in the present embodiment are designated by the same reference numerals).

This construction method is generally called a propulsion construction method, and is more frequently used in urban areas because it has a feature that it can be performed without restrictions on the ground such as traffic conditions and commercial activities, compared to the excavation method in which the ground is excavated from the surface. ing.

By the way, in the excavation by the excavating portion 2 in this method, it is general to excavate slightly larger than the outer diameter of the pipe member 3 (excessive excavation). Therefore, the earth and sand on the outer periphery of the pipe member 3 is loose, and therefore the frictional force with the pipe member 3 is also small.

However, when the propulsion distance becomes long, the earth pressure on the pipe member 3 (tightening force due to the increase in adhesion of earth and sand to the outer periphery of the pipe member 3) increases, and the frictional force with the pipe member 3 also increases. . That is, as shown in FIG. 1, the surrounding earth and sand and the pipe member 3 are excessively contacted with each other, so that the propulsion is not smoothly performed.

In such a case, the work of filling the outer surface of the pipe member 3 with a lubricant (such as bentonite) has been performed so far.

[0008] A concrete filling of the lubricant is performed by an operator by the pipe member 3.
The lubricant lead-out hole 5 that has penetrated into the pipe member 3 and is bored in the pipe member 3
(Usually, the lubricant outlet 5 is formed in only one place in the pipe member 3.) The lubricant is injected from the pipe member 3 to the outside of the pipe member 3.

However, even if the lubricant is discharged, the lubricant discharge hole 5
Since only one tube member 3 is provided with the lubricant, it is sufficient to fill the lubricant-required portion (the portion X in FIG. 1) with the lubricant, but if it is not, the lubricant should be filled. Filling has no meaning at all.

Until now, it was judged by the operator's intuition which pipe member 3 was badly slipped, and a large amount of lubricant was introduced from the lubricant outlet 5 to fill the entire circumference of the pipe member 3 with the lubricant. I am trying to do it. Then, even after the lubricant is filled, if it is confirmed that the slip of the pipe member 3 is still poor, the work of introducing the lubricant from the lubricant outlet 5 of another pipe member 3 is repeated, and the work efficiency is poor and the lubricant is There is also a waste of money. Furthermore, in fact, there is a problem that the lubricant is not properly filled in the entire circumference of the pipe member 3 when the lubricant is discharged from the lubricant discharge hole 5 at one place.

It is a technical object of the present invention to provide a lateral hole drilling method which solves the above problems, and a pipe member and a tubular body used in the method.

[0012]

The gist of the present invention will be described with reference to the accompanying drawings.

A vertical pile 1 is pierced, and a pipe member 3 provided with an excavation portion 2 at the tip from the peripheral wall of the vertical pile 1 is pushed by an appropriate means 4, and while the pipe member 3 is additionally pushed sequentially, It is used for an excavation method for discharging an object to be excavated through a pipe member 3, characterized in that a plurality of lubricant outlet holes 5 for letting out a lubricant are formed in an annular shape on the outer peripheral surface of the pipe member 3. The present invention relates to a pipe member used in the horizontal hole drilling method. In addition, a vertical pile 1 is bored, and a pipe member 3 having an excavation portion 2 at the tip from the peripheral wall of the vertical pile 1 is pushed by an appropriate means 4, and the pipe member 3 is sequentially pushed by additional pushing. It is used for a method of excavating an object to be excavated through a member 3, and a pipe body 6 interposed between the consecutive pipe members 3 is provided, and a lubricant is provided on the outer peripheral surface of the pipe body 6. The present invention relates to a tubular body used in a lateral hole drilling method, which is characterized in that a plurality of sliding member leading holes 7 to be led out are formed in an annular shape.

Further, the pipe member 3 and the pipe body 6 according to claims 1 and 2 are used, and the lubricant is supplied from all or arbitrary lubricant lead-out holes 5 and 7 arranged in an annular shape of the appropriate pipe member 3 or pipe body 6. The present invention relates to a lateral hole drilling method, which is characterized in that

[0015]

[Function] Since the lubricant is uniformly filled into the entire outer periphery of the pipe member 3 (the pipe body 6) by the lubricant guide holes 5 and 7 arranged in an annular shape, the pipe member 3 can be favorably propelled. Becomes

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings illustrate one embodiment of the present invention and will be described below.

FIG. 2 shows a concrete pipe member 3 (diameter about 1
m, the length is about 3 m), the lubricant lead-out hole 5 is formed in a ring shape.

A check valve for preventing backflow of the lubricant is provided inside the lubricant outlet 5 (the same applies to the lubricant outlet 7).

FIG. 3 shows a tubular body 6 interposed between concrete pipe members 3. This tube 6
The lubricant lead-out hole 7 is formed in the ring.

Using the above FIGS. 2 and 3, a lateral hole is bored as shown in FIG. 4, and when the progress of the pipe member 3 becomes poor during the propulsion of the pipe member 3, the lubricant lead-out hole 7 is formed. When the lubricant is drawn out of the pipe, the lubricant is uniformly filled on the entire outer circumference of the pipe body 6 (the pipe member 3), and therefore the propelling of the pipe member 3 is improved by the lubricant.

In order to draw out the lubricant from the lubricant lead-out hole 7, an operator may enter the pipe body 6 to introduce the lubricant into each of the different lubricant lead-out holes 7, or each lubricant lead-out hole 7 may be introduced. 5 is communicated with the inside of the pipe body 6 as shown in FIG. 5, a proper valve device is provided, and a predetermined amount (for example, an amount controlled in synchronization with the propulsion speed) of the lubricant is provided only in an arbitrary lubricant outlet hole 7. The lubricant may be introduced, and the lubricant may be led out from an arbitrary lubricant lead-out hole 7 outside the pipe member 3 by remote control. In this case, it is more practical to use a sensor in an appropriate place of the pipe body 6 in order to know the degree of contact between the pipe body 6 and the earth and sand so that the lubricant can be filled only in a necessary portion.

When the liquid is injected into the soil by pressure, it is difficult to evenly inject it due to the soil properties (grain size, density, porosity, etc.) of the natural ground and the groundwater pressure.

For example, even if a plurality of lubricant outlets are provided and the lubricant is simply led out from all the lubricant outlets, a large amount of lubricant is led out from the lubricant outlets which are advantageous in terms of conditions. Unequal derivation. Further, if the lubricant is continuously introduced from the specific lubricant outlet, the lubricant will be removed by the pipe member 3.
It is introduced into the soil in a split form.

In order to solve such a point, a certain amount is introduced so that the introduction into a specific lubricant introduction hole does not interfere with the introduction into another lubricant introduction hole and is not influenced by the change of the ground. It is desirable to design so as to introduce the lubricant under the control of the automatic control unit 8 such as a metering pump or a switching valve that enables the introduction of the lubricant.

[0025]

As described above, according to the present invention, the entire outer circumference of the pipe member is uniformly filled with the lubricant, and the lateral holes can be formed very efficiently.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view of a state in which a lateral hole is drilled.

FIG. 2 is a perspective view of an example.

FIG. 3 is a perspective view of an example.

FIG. 4 is a diagram illustrating a usage state of the embodiment.

FIG. 5 is an explanatory diagram of a lubricant lead-out hole.

[Explanation of symbols]

 1 Standing Pile 2 Excavation Part 3 Pipe Member 4 Appropriate Means 5 Lubricant Lead-out Hole 6 Tubular Body 7 Lubricant Lead-out Hole

Claims (3)

[Claims] 1. A vertical pile is pierced, and a pipe member having an excavated portion at the tip from the peripheral wall of the vertical pile is pushed by an appropriate means, and the pipe member is successively pushed through the pipe member while further pushing the pipe member. A horizontal hole drilling method, which is used for a drilling method for discharging a drilled object, wherein the outer peripheral surface of the pipe member is formed with a plurality of lubricant outlet holes for guiding a lubricant in an annular shape. The pipe member used. 2. A vertical pile is pierced, and a pipe member provided with an excavated portion at the tip from the peripheral wall of the vertical pile is pushed by an appropriate means, and the pipe member is successively pushed through the pipe member while additionally pushing the pipe member. It is used for an excavation method for discharging excavated material, and a pipe body provided between the continuous pipe members is provided, and a plurality of lubricant lead-out holes for letting out a lubricant are provided on an outer peripheral surface of the pipe body. A tubular body used in a lateral hole drilling method, which is characterized in that the tube is drilled in an annular shape. 3. The pipe member or pipe body according to claim 1 or 2 is used, and the lubricant is led out from all or arbitrary lubricant lead-out holes arranged in an annular shape of the appropriate pipe member or pipe body. Lateral hole drilling method.