JP2823975B2 - Vertical hole drilling method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for excavating a vertical hole (pit) in a groove shape, particularly for installing an underground object such as an underground tank below the ground surface.

[0002]

2. Description of the Related Art Generally, when an underground tank or the like is installed below the ground surface, a vertical hole is excavated. Conventionally, such a vertical hole is formed by a method of embedding a parent pile, a steel sheet pile construction method, or a steel sheet pile upright construction method. Have been drilled.

[0003]

However, these construction methods require a large-scale dedicated machine in any of the construction methods, and are inefficient and extremely uneconomical for small-scale construction. In addition, since it is necessary to install the retaining material in the pit during the excavation, there is a danger that the retaining device may be collapsed, which is dangerous.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method of excavating a vertical hole, which is capable of safely and economically excavating a vertical hole continuous in a groove shape. And

[0005]

[Means for Solving the Problems ] To solve the above problems,
In the vertical hole excavation method according to the present invention, a vertical hole is excavated.
Connect the two pillars in the ground to be connected with the connecting member
The guide pile, which is formed in a girder shape by
Placed on both sides of the vertical hole in the direction of excavation and pushed into the ground
And then sunk in the ground at the excavation end of the column.
Panel is supported on each of the columns, and
Press in each to build it, and then
In the ground at the excavation end, connect the two pillars with a connecting member
The guide pile, which is formed in a girder shape by
Placed on both sides of the vertical hole in the direction of excavation,
To the panel and push it into the ground to build it
And then remove the inner ground surrounded by the retaining panel
Excavation from the outside of the fastening panel must be
Go to the other end side alternately to excavate a vertical hole continuous in a groove shape,
Next, when the excavation of the vertical hole is completed,
An upright is set up and the tether is removed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a vertical hole excavation method according to the present invention, a guide pile 1 as shown in FIG. 10, a guide pile 2 as shown in FIG. 11, and a retaining panel as shown in FIGS. 3 and 4 are used respectively.

The guide pile 1 is constructed in such a manner that two pillars 1a, 1a are erected at predetermined intervals substantially vertically, and these pillars 1a, 1a are connected by two or a plurality of connecting members 5, 5 to form a girder. It is configured (see FIG. 10).

[0008] Similarly, the guide pile 2 also has two columns 2
a, 2a are installed substantially vertically at predetermined intervals, and
a and 2a are connected by two or more connecting members 5 to form a cross-girder (not shown).

The column 1a is formed from a square steel pipe, and a guide rail 6 having a substantially lip groove-shaped cross section for guiding the retaining panels 3 and 4 is provided on two adjacent side surfaces of the column 1a.
(See FIG. 8).

The guide rail 6 is formed by welding, for example, a lip channel steel to the side surface of the column 1a.
The left and right flange portions 6a, 6a have a plurality of through holes 6b.
Are formed at predetermined intervals in the vertical direction.

On the other hand, the column 2a is formed by tying two lip channels together back to back, and the lip channels of each lip channel are guided by guide rails 6 for guiding the retaining panels 3 and 4. (See FIG. 9).

The two lip channel steels are integrally held together by welding or bolting with the connecting members 7, 7 interposed therebetween, and an appendage member 8 having a substantially groove-like cross section is welded or welded to one side surface thereof. It is attached by bolting.

A plurality of through holes 8b, 8b are formed at predetermined intervals in the left and right flange portions 8a, 8a of the attachment member 8 in the vertical direction.

The pillars 1a and 2a are formed with an edge at a lower end so that they can be pushed into the ground (not shown).

The connecting member 5 is made of, for example, a section steel such as an H-section steel, but is made telescopic by a so-called telescope structure, so that the spacing between the left and right columns 1a, 1a and between the columns 2a, 2a can be set. May be freely changed, and a structure in which a root cut surface is pressed by incorporating a jack (not shown) may be adopted.

The retaining panels 3 and 4 are formed in a rectangular plate shape from a steel plate or a PC plate (see FIGS. 12 and 13). In particular, the retaining panel 3 has an edge 3a at its lower end so that it can be pushed into the ground. Is formed.

Next, a vertical hole excavation method according to the present invention will be described. First, excavate about 50 cm of the ground surface in the area where the vertical hole is to be excavated.

Next, the guide pile 1 is erected along the surplus cut surface (see FIG. 1). The guide pile 1 has left and right columns 1a, 1a arranged on both sides in the direction of excavation of the vertical hole,
Push it into the ground and build it. And right and left support 1
a, 1a and the directions of the guide rails 6, 6 are checked.

One of the guide rails 6 is set to face directly in front of each other, and the other is set in the excavation direction (FIG. 1).
(See FIG. 6).

Next, the left and right columns 1a, 1 of the guide pile 1
earth retaining panel 3 between a and the pillars 1a, 1a,
(See FIG. 2).

At this time, the retaining panel 3 is self-supported by fitting both ends of the retaining panel 3 into the guide rail 6 of the column 1a. In addition, the guide piles 2 are erected at the excavation side ends of the left and right retaining panels 3 (see FIG. 3).

At this time, the guide pile 2 is pushed into the ground and self-supported similarly to the guide pile 1 previously built. Also, the guide rails 6 of the left and right columns 2a, 2a are fitted into the ends of the left and right earth retaining panels 3, respectively (see FIG. 3).

Next, each soil retaining panel 3 is pushed in,
The pushing of the guide piles 1 and 2 and the excavation of the inner ground surrounded by the retaining panel 3 are alternately repeated in this order, and the vertical hole is formed to a predetermined depth while the root cut surface is protected by the retaining panel 3. (See FIG. 4).

An excavating machine such as a backhoe is used for pushing each retaining panel 3, pushing the guide piles 1 and 2, and excavating the ground.

When the retaining panel 3 has been pushed below the ground surface, two or three retaining panels 4 are further pushed in according to the depth of the vertical hole to be excavated thereon (FIG. 5). reference). At that time, when pushing the guide piles 1 and 2, care should be taken so that the connecting member 5 does not tilt (5 ° is a limit).

Next, the left and right columns 2 a and 2 of the guide pile 2
A new retaining panel 3 is erected on the side of the excavation direction a (see FIG. 6). The retaining panel 3 is self-supporting by fitting both edges of the retaining panel 3 into the guide rails 6 of the left and right columns 2a of the guide pile 2 respectively.

Next, a guide pile 2 is newly built at the end of the earth retaining panel 3 on the excavation direction side end. The guide pile 2 is pushed into the ground like the guide piles 1 and 2 erected earlier to be free standing, and the guide rails 6 are fitted into the ends of the left and right earth retaining panels 3 respectively.

Next, as in the case of (1), the pushing of the left and right retaining panels 3, the pushing of the guide pile 2, and the excavation of the ground surrounded by the retaining panels 3 are alternately repeated in this order, and The vertical hole is excavated to a predetermined depth while the cut surface is protected by the retaining panel 3.

Hereinafter, by repeating this process in the direction of excavation, a vertical hole continuous in a groove shape is excavated (see FIG. 7). At the end of the vertical hole, the guide pile 1
The same thing as above is built, and the left and right supports 1 of this guide pile 1
The retaining panels 3 and 4 are erected between a and 1a.

When the excavation of the vertical hole is completed, the retaining panel 3
A swelling 9 made of H-shaped steel or the like is installed inside
The retaining panels 3 and 4 are supported from the inside so as not to collapse (see FIG. 7).

In order to install the uplift 9, a bracket 10 is attached in advance to each support 2 a of the guide pile 2, and the upset 9 is installed on the bracket 10 (FIG. 1).
4,15).

The bracket 10 is formed in an L shape, and a plurality of mounting tubes 10a are horizontally mounted at predetermined intervals in the vertical direction on the back side. The attachment pipes 10a are attached so as to correspond to every other or every two through holes 8b of the left and right flange portions 8a, 8a of the attachment member 8.

The bracket 10 is attached to the side surfaces of the columns 1a and 2a with the mounting tube 10a fitted between the left and right flange portions 8a of the attachment member 8, and the bracket 10 is attached to the left and right flange portions 8a. From the through hole 8b to the mounting pipe 10
It is fixed by tightening the mounting bolt 11 to a.

Also, the guide pile 2 is set at the same time as the
The connecting member 5 is removed so as not to hinder the installation of an underground object such as an underground tank.

The guide piles 1 and 2, the retaining panels 3 and 4, the bulges 9 and the brackets 10 are removed when the underground tank or other underground buried object is buried and reused. Prepare.

[0036]

The method of excavating a vertical hole according to the present invention has the above-described construction, and particularly, is formed in a girder shape by connecting two pillars with a connecting member in the ground where the vertical hole is to be excavated. Guide piles, the pillars are arranged on both sides in the direction of excavation of the vertical hole, and are pushed into the ground to be built, and then, in the ground at the excavation-side end of the pillars, earth retaining panels are respectively supported by the pillars, And pushed into the ground and built respectively, and then, in the ground at the excavation side end of the earth retaining panel, a guide pile configured in a girder shape by connecting two pillars with a connecting member, Placed on both sides of the vertical hole in the direction of excavation, supported by the retaining panel, and pushed into the ground to build it, and then excavate the inner ground surrounded by the retaining panel from outside the retaining panel. This The drilling is performed alternately from one end of the vertical hole to the other end to excavate the continuous vertical hole in a groove shape, so that all the space surrounded by the retaining panel is opened in the same way as the previous method of embedding the parent pile. It is possible to excavate a vertical hole in a state where the vertical hole is excavated, and to excavate a vertical hole of a required length extremely safely and extremely efficiently by preventing collapse of the ground at the time of excavating the vertical hole.

Further, after the excavation of the vertical hole is completed, the ridge is installed inside the retaining panel, so that the collapse of the ground after the construction can be prevented.

Further, the guide pile can be easily manufactured from existing construction materials such as a square steel pipe or a lip channel steel, and a conventional retaining panel can be used. Since there is no need for drilling, it is possible to carry out excavation work very economically.

[Brief description of the drawings]

FIG. 1 is a process diagram showing a vertical hole excavation method according to the present invention.

FIG. 2 is a process chart showing a vertical hole excavation method according to the present invention.

FIG. 3 is a process chart showing a vertical hole excavation method according to the present invention.

FIG. 4 is a process chart showing a vertical hole excavation method according to the present invention.

FIG. 5 is a process chart showing a vertical hole excavation method according to the present invention.

FIG. 6 is a process chart showing a vertical hole excavation method according to the present invention.

FIG. 7 is a plan view showing a vertical hole excavation method according to the present invention.

FIG. 8 is a partial perspective view of a column.

FIG. 9 is a partial perspective view of a column.

FIG. 10 is a perspective view of a guide pile.

FIG. 11 is a perspective view of a guide pile.

FIG. 12 is a perspective view of a retaining panel.

FIG. 13 is a perspective view of a retaining panel.

FIG. 14 is a perspective view showing an installation state of a prone position.

FIG. 15 is a perspective view of a bracket.

[Explanation of symbols]

1,2… guide pile, 3,4… retaining panel, 5… connecting member,
6 ... guide rail, 7 ... connecting member, 8 ... auxiliary member, 9 ...
Provoked, 10 ... bracket, 11 ... mounting bolts.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoshinori Motohara 4-7-1, Kitahama, Chuo-ku, Osaka-shi, Osaka Sumitomo Bldg. No. 3 Sumitomo Metal Industries Co., Ltd. In-house (56) References JP-A-56- 156324 (JP, A) JP-A-61-165421 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02D 17/08

Claims (1)

(57) [Claims] 1. Excavation of a vertical hole for excavating a vertical hole continuous in a groove shape.
In the shaving method, 2
It is formed in a girder shape by connecting the columns of the book with connecting members
Guide pillars on both sides in the direction of excavation of the shaft
And push it into the ground to build it, then
Retaining panels are attached to the pillars in the ground at the excavation end of the pillars.
Each is supported and pushed into the ground to build each
And then into the ground at the excavation end of the retaining panel,
It is formed in a girder shape by connecting the columns of the book with connecting members
Guide pillars on both sides in the direction of excavation of the shaft
And supported by the retaining panel,
And push it into the ground to build it.
Excavation from the outside of the retaining panel to the inner ground surrounded by
To alternately go from one end of the vertical hole to the other.
Drilled a series of vertical holes, then the drilling of the vertical holes was completed
From the earth retaining panel, set up a belly inside, and said
Groove-shaped longitudinal section characterized by removing the connecting member
Hole drilling method.