JPH1144173A - Excavating construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obviate an exclusive work machine, and improve the efficiency of work by replacing a drill, a bucket, a mortar sprayer and a lock bolt driver with each other according to a process when a vertical hole is excavated by a publicly known excavator. SOLUTION: An earth drill is installed in a work machine 1 composed of a self-traveling crane, and a hole port is initially excavated, and a liner plate is inserted into the hole port, and is fixed by concrete, and the hole port is positioned. Next, a kelly bar 2 is hung up, and the tip earth drill is replaced with an excavating bucket, and it is excavated up to a constant depth by the bucket. The excavating bucket is pulled up, and is replaced with a concrete sprayer 12, and concrete is placed on an inner wall while rotating it. Afterwards, it is replaced with a lock bolt borer, and lock bolts are driven in a radial shape in a wall surface, and the wall surface is reinforced. It is excavated up to a prescribed depth while repeating this process, and work can be performed by the single work machine 1 over the whole process. Therefore, a construction period is shortened, and a cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of excavating a vertical hole in a ground using a working machine such as a backhoe and a crane.

[0002]

2. Description of the Related Art For example, when a vertical hole having a diameter of about 2.5 to 4.5 meters is excavated, as shown in FIG. There is known a technique for excavating a hole, inserting a liner plate 7 after excavation to some extent, and retaining the ground, and further excavating, inserting a liner plate 7 to excavate a hole.

In FIG. 9, concrete 18 is sprayed on the inner wall of a hole 19 in place of a liner plate, and a lock bolt 21 made of a reinforcing bar having a length of about 4 to 6 meters is attached radially outward to a ground G. NATM method (NewAustrian Tunn)
el Method) is also known.

[0004]

However, in the above technique, it is necessary to prepare a working machine every time a process such as excavation, insertion of a liner plate, spraying of concrete, or insertion of a rock bolt (rebar) is changed. It was a necessary, tedious and cumbersome task, and a time-consuming one.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an efficient excavation method in which work can be easily and continuously performed without replacing a work machine every time a process is changed.

[0006]

According to the present invention, a well-known excavator is mounted on a working machine for excavation, and after excavation to a certain depth, the excavator is removed and a spraying device is mounted on an inner wall of the excavated hole. When the mortar is sprayed, when the spraying is completed, the spraying device is removed, a rod-shaped reinforcing material insertion device is attached, and a bar-shaped reinforcing material is driven radially outward from the inner wall of the hole. , And excavation is performed by repeatedly performing the above steps. Further, according to the present invention, there is provided an excavation method in which a hole is initially cut, a liner plate is inserted into the hole, fixed and fixed with fixed concrete, and the inside of the liner plate is excavated by a drilling device.

According to the present invention, there is provided an excavation method in which a plurality of radially outwardly extending guide members are provided on an attachment member to which the excavator is attached, and excavation is performed by guiding the excavation direction. Excavation of a hole for inserting a hole and insertion of a reinforcing material are performed simultaneously.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, members having the same functions as those of the related art are denoted by the same reference numerals, and redundant description is omitted.

FIG. 1 is a flow chart of the entire process of the excavation method according to the present invention. In excavation, referring to FIG. 2, first, a self-propelled crane generally designated by reference numeral 1 is prepared. Kelly Bar 2 is a well-known technology
A guide 3 is attached to an arm 4 provided on the crane 1 and a kelly bar 2 is supported vertically. An earth drill 6 is provided at the tip of the kelly bar 2. Here, reference numeral 5 denotes a winding device such as a wire or a hose (not shown in detail), and reference numeral 5a denotes a drum.

Then, the hole is initially cut with the earth drill 6, and the liner plate 7 is inserted into the hole and fixed with the hole fixing concrete 8 to position the hole (steps S1, S2, S3). . In addition, a protective fence 9 is provided around it for safety. Now that the hole has been completed, referring to FIG.
The earth drill 6 at the lifting tip is replaced with the excavation bucket 10 to advance the excavation (step S4). After excavation to a certain depth, the bucket 10 is released from the kelly bar 2 by releasing the connecting means (not shown) (step S5), and concrete is sprayed. The spraying machine 12, which is a known technique, is attached, and concrete is sprayed on the inner wall of the excavated hole (steps S6 and S6).
7).

Referring to FIG. 4, the spraying machine 12 is connected to the kelly bar 2 by a swivel joint 13 and is mounted on a turntable 15 at the end provided through a triple tube 14 so as to be expandable and contractible. The nozzle 16 is configured to spray concrete onto the inner wall while rotating the turntable 15 by driving means (not shown). Here, the attaching means of the spraying machine is not limited to the above, but may be another known means, and an arbitrary device may be used as the driving means.

When the spraying is completed, the spraying machine 12 is disengaged by the swivel joint 13 and a drilling machine 20 is attached, and a rock bolt 21 formed of a reinforcing bar as a bar-like reinforcing material is penetrated and simultaneously penetrates the sprayed concrete. To reinforce the drilled hole (steps S8, S8)
9, S10).

Referring to FIG. 5, the drilling machine 20 is connected to the kelly bar 2 by a swivel joint 13. The kelly bar 2 is moved up and down by a crane, and the drilling machine is rotated by driving means (not shown) to move the drilling machine up and down. The lock bolt 21 is driven radially at a constant pitch from the inner wall of the hole 19 to the periphery at the same time as the hole is drilled.

Although it has been described that the lock bolt 21 is driven simultaneously with the drilling, the lock bolt 21 may be driven before the lock bolt 21 is driven.

After the reinforcement with the lock bolts 21 is completed, the drilling machine 20 is removed, the excavating bucket 10 is attached to the kelly bar 2 (steps S11 and S12), and the excavation is started again. And
Upon completion, the scale is measured (step S13).

According to the present invention, as described above, by simply replacing the device for each process attached to the tip,
Drilling of holes is possible, and there is no waiting time between processes, so that efficient drilling work is possible.

FIG. 7 shows another embodiment of the present invention in which a guide member 35 having a buffer member 36 is attached to the tip of a kelly bar 2 so that the excavation direction is not bent in each step.

Although the above excavation work is performed using a crane, the working machine is not limited to a crane, and as shown in FIG.
First, a drilling bucket 10a is attached to the tip of the crater, and a hole is excavated in the same manner as a crane by sequentially replacing the spraying machine and the drilling machine with the machine at the tip.
Further, the excavator, the spraying machine, the drilling machine and the like may be any conventionally known machine as long as it is a machine that can be attached, and the same operation and effect can be obtained.

[0019]

The present invention is configured as described above,
It is possible to excavate vertical holes efficiently using a known work machine, and it is possible to perform reinforcement work as a part of work,
No special machine is required and the construction period is shortened, so that the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall flowchart of work steps showing an embodiment of the present invention.

FIG. 2 is a diagram showing an initial excavation step of FIG. 1 when a self-propelled crane is used.

FIG. 3 is a diagram showing the excavation process of FIG. 1 when a self-propelled crane is used.

FIG. 4 is a view showing a concrete spraying step of FIG. 1 when a self-propelled crane is used.

FIG. 5 is a diagram showing a reinforcing step using the lock bolt of FIG. 1 when a self-propelled crane is used.

FIG. 6 is a diagram showing a case where a backhoe which is another working machine is used in the excavation method according to the present invention.

FIG. 7 is a view showing a guide member according to another embodiment of the present invention.

FIG. 8 is a diagram showing an example of a conventional technique.

FIG. 9 is a diagram showing another example of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Self-propelled crane 2 ... Kelly bar 3 ... Guide 4 ... Arm 5 ... Winding device 6 ... Earth drill 7 ... Liner plate 8 ... Concrete with fixed hole 10, 10a: excavating bucket 12: spraying machine 13: swivel joint 30: backhoe 31: boom S: worker G: ground mountain

Claims (4)

[Claims] 1. Excavating a work machine with a known excavating device, excavating to a certain depth, removing the excavating device, attaching a spraying device and spraying mortar on the inner wall of the excavated hole, and when the spraying is completed, spraying the mortar. Remove the device, attach the rod-shaped reinforcing material insertion device and drive the rod-shaped reinforcing material radially outward from the inner wall of the hole,
When the driving is completed, the excavating method is characterized in that the rod-shaped reinforcing material insertion device is removed, and the above steps are repeated to excavate. 2. Initially cutting the hole, inserting a liner plate into the hole, fixing with fixed concrete, and positioning.
The inside of the liner plate is excavated by an excavator.
Excavation method described in. 3. The excavation method according to claim 1, wherein a plurality of radially outwardly extending guide members are provided on an attachment member to which the excavator is mounted to guide the excavation direction. 4. The excavation method according to claim 1, wherein excavation of a hole into which a bar-shaped reinforcing material is inserted and insertion of the reinforcing material are performed simultaneously.