JPH0441753B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is for providing a continuous wall between vertical holes excavated with a certain gap when constructing a thin film underground continuous wall for the purpose of water shielding. This invention relates to a continuous wall excavator that excavates between vertical holes.

[Conventional technology]

Conventionally, as an excavator for continuous walls, for example, the one shown in FIG. 8 has been used.

This excavator for continuous walls is suspended by a crane (not shown), and connects the vertical holes 1 by excavating the soil layer 2 between the plurality of vertical holes 1 penetrated through the soil layer.

However, this continuous wall excavator uses an underwater electric motor 3 connected to a ground power source via a cable 3a as a drive source to drive a straight cutter 5 and a rotary cutter 6 via a reduction gear 4, and uses - As shown in FIG. 9, which is a view taken along the line E, the soil layer 2 between the vertical holes 1 is excavated.

Here, the rotary cutter 6 excavates in a circular arc 6a shape, and the linear cutter 5 excavates in a rectangular shape 5a.

Therefore, the excavation width 13 of the continuous wall hole portion 14 of the soil layer 2 between the vertical holes 1 is approximately the same as the diameter 13a of the rotary cutter 6, and as shown in FIGS. 6 and 7, the excavation width 13 is continuous. A wall hole 14 is excavated.

[Problem that the invention seeks to solve]

However, when the purpose is to block water, the excavation width 13 of the continuous wall hole 14 by the above-mentioned conventional device is too thick and unnecessary, so the amount of concrete to be filled is large and the amount of excavated and discharged soil is also large. In many cases, it was uneconomical.

Furthermore, since the cutters 5 and 6 are configured to come into contact with the soil layer 2 due to their own weight, in the case of a hard soil layer 2 or a soil layer 2 of uneven hardness, the cutting reaction force may cause the device to escape. There was a problem that the excavation work did not proceed smoothly.

Therefore, the present invention was proposed to solve the above-mentioned problems.The width of the continuous wall hole between the vertical holes is thin, and the amount of concrete to be filled and the amount of soil to be excavated and discharged is small. The purpose of the present invention is to provide a continuous wall excavator that is economical and has good excavation efficiency.

[Means for solving problems]

The present invention improves a continuous wall excavator that communicates between a plurality of vertical holes by excavating a plurality of vertical holes suspended from a water drop means and penetrated through a soil layer. a gripper frame which is vertically movably suspended by the hanging means, is provided in plural pieces radially, and at least one of which is fixed by pressing the inner wall of the vertical hole by extending radially; and the gripper frame. It consists of a machine body installed to be able to move up and down with respect to the frame, and a chain cutter installed on the machine body to excavate between the vertical holes by circulating and rotating in the vertical direction. The continuous wall excavator is characterized in that it is configured to be housed along the machine body by turning to the machine body, or to be located at a laterally symmetrical position of the machine body.

[Effect]

According to the present invention, in order to excavate the soil layer between vertical holes using a chain cutter attached to the aircraft body,
The width of the continuous wall hole is thin, and the amount of concrete to be filled and the amount of soil to be excavated and discharged is small, making it economical.

In addition, since the gripper frame extends radially and is fixed by pressing against the inner wall of the vertical hole, even when the chain cutter excavates a soil layer with hard or uneven hardness, there is no risk of equipment escape. Therefore, excavation can proceed smoothly and efficiently.

Furthermore, the chain cutter can be stored along the fuselage by rotating vertically, or it can be located at a symmetrical position on the fuselage, so the chain cutter can be stored in the fuselage and can be stored in the vertical hole. This makes it easier to pull up, transport, etc., and enables highly efficient excavation.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments with reference to the drawings.

FIG. 1 and FIG. 2, which is a view taken along line A--A in FIG. 1, are explanatory diagrams of a state in which an embodiment of the present invention is applied.

As shown in FIG. 3, the gripper frame 15 constituting this embodiment is attached to a hanging rod 17 by a crane 16, which is a hanging means, in a vertical hole 1 and taken along the line B--B in FIG. They are vertically movably suspended via rods 33a, 33b, and 33c shown in FIG. 4, which is an arrow-view diagram, and are provided radially around the ring 15a.

This hanging means is not limited to the crane 16, but a tower or the like may also be used.

One of the gripper frames 15 further includes a ring 15a with a hydraulic cylinder 30 shown in FIG.
It is provided so as to be expandable and contractible, and when expanded, it presses against the inner wall 20 of the vertical hole 1 and is fixed.

In this embodiment, only one gripper frame 15 is configured to extend radially, but the number thereof is not limited.

As shown in FIG. 4, the gripper frame 15 has a pair of upper and lower parts connected and fixed by rods 33.

The body 21 is provided so as to be vertically movable by sliding a cylindrical guide rod 22 forming an upper and a lower part against a ring 15a of the gripper frame 15.

As shown in FIG. 3, a hydraulic cylinder 23 operated by a ground hydraulic unit is provided between the fuselage 21 and the non-extending gripper frame 15.

The body 21 is slid up and down with respect to the gripper frame 15 by expansion and contraction of the hydraulic cylinder 23.

The chain cutter 25 is shown in Fig. 3 and C in Fig. 3.
It is provided on the swing frame 35 as shown in FIG. 5, which is a view taken along the line -C.

Here, as shown in FIG. 4, the rotation of the hydraulic motor 27 connected to the hydraulic unit on the ground is decelerated by the deceleration unit 28, and the chain cutter 25 is driven to circulate and rotate. Figures 3 and 5
Excavate with a cutter 34 shown in the figure.

The rotating frame 35 is connected via the rotating metal 36,
It is provided in the casing 21a of the fuselage 21 and rotates together with the chain cutter 25 in the direction of arrow 37, which is the vertical direction.

The joint 35a of the swing frame 35 is connected to the joint 21b of the fuselage 21 via a hydraulic cylinder 38, and as the hydraulic cylinder 38 expands, the chain cutter 25 moves along with the swing frame 35 in the direction indicated by the arrow 3.
It rotates in seven directions and is stored along the fuselage 21 as shown by the dashed line in FIG. 4, making it convenient for lifting and transporting the fuselage 21.

Here, the hydraulic cylinder 38 is connected to the rotating frame 35.
The chain cutter 25 is separated from the joint 35a of the fuselage 21 and the joint 21b of the fuselage 21, and the chain cutter 25 is further rotated together with the rotating frame 35 in the direction of the arrow 37.
It is located on the left side of the fuselage 21 as shown in the figure. At this time, the hydraulic cylinder 38 connects the joint 35b of the rotating frame 35, which is indicated by the rays in FIG. 3, and the joint 21c of the fuselage 21.

Next, the operation of this embodiment will be explained.

First, as shown in FIGS. 1 and 3, when the hydraulic cylinder 23 is in a retracted state, that is, when the body 21 is at the uppermost position with respect to the gripper frame 15,
The gripper frame 15 is radially expanded by the hydraulic cylinder 30 and fixed by pressing against the inner wall 20 of the vertical hole 1.

In this state, the chain cutter 25 is rotated to gradually extend the hydraulic cylinder 23.

Due to this extension of the hydraulic cylinder 23, the machine body 21 slides downward relative to the gripper frame 15, and the chain cutter 25 excavates the soil layer 2 between the vertical holes 1.

The chain cutter 25 is stopped when the machine body 21 is located at the lowest position with respect to the gripper frame 15 as shown in FIG.

Next, the hydraulic cylinder 30 is retracted to separate the gripper frame 15 from the inner wall 20 of the vertical hole 1, and the hydraulic cylinder 23 is also retracted in the same manner, as shown in FIGS. 1 and 3. The body 21 is returned to the uppermost position with respect to the gripper frame 15.

Furthermore, the hanging rod 17 is lowered by the crane 16, and the gripper frame 15 and the fuselage 21 are lowered.
The whole body is lowered, and in this lowered position, the gripper frame 15 is again radially extended by the hydraulic cylinder 30 and fixed by pressing against the inner wall 20 of the vertical hole 1, and the above-mentioned process is repeated to perform excavation. Let it proceed.

As a result, as shown in FIG. 6, the excavation width 13b of the continuous wall hole 14 has become much thinner than the excavation width 13 by the conventional apparatus shown in FIG. 7 and FIG. 8.

As shown in FIGS. 1 and 3, the excavated earth and sand can be collected and discharged using a bucket 39 at the same time as the excavation work.

Of course, it can also be discharged by a club bucket or slurry pump (not shown).

In addition, as shown on the right side of Figure 6, if the width of the soil layer 2 between the vertical holes 1 is wide and the chain cutter 25 can only excavate halfway into the soil layer 2, it is necessary to excavate from both vertical holes 1. Must be.

In this case, turn the chain cutter 25 from the right side of the fuselage 21 shown in FIG. 3 in the direction of arrow 37, shift it to the left side of the fuselage 21 as shown in FIG. dig.

〔Effect of the invention〕

As explained above, in the present invention, the soil layer between the vertical holes is excavated by a chain cutter attached to the fuselage, so the width of the continuous wall hole is thin, and the amount of concrete to be filled is reduced. It requires less soil and is economical.

In addition, since the gripper frame extends radially and is fixed by pressing against the inner wall of the vertical hole, even when the chain cutter excavates a soil layer with hard or uneven hardness, there is no risk of equipment escape. This has the effect that excavation can proceed smoothly and efficiently.

Furthermore, since the chain cutter can be stored in the fuselage, it becomes easy to pull it up in the vertical hole, transport it, etc.

In addition, soil can be efficiently collected and discharged at the same time as excavation using the bucket in the adjacent vertical hole.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a state in which an embodiment of the present invention is applied, FIG. 2 is a view taken along the line A-A in FIG. 1, and FIG.
The figure is a front view, Figure 4 is a view taken along the line B-B in Figure 3,
5 is a view taken along the line C-C in FIG. 3, FIG. 6 is a plan view of the continuous wall hole according to this embodiment, FIG. 7 is a plan view of the continuous wall hole according to the conventional device, and FIG. FIG. 8 is an explanatory diagram of a conventional device, and FIG. 9 is a view taken along the line E--E in FIG. 1... vertical hole, 2... soil layer, 15... gripper frame, 20... inner wall, 21... fuselage, 25...
...Chain cutter.

Claims (1)

[Scope of Claims] 1. A connecting wall excavator that is suspended by a hanging means and that communicates between a plurality of vertical holes penetrated through a soil layer by excavating between the vertical holes, comprising: A gripper frame that is hung movably up and down by a hanging means, is provided in plural pieces radially, and at least one of the gripper frames is fixed by pressing the inner wall of the vertical hole by extending radially; and the gripper frame. It consists of a machine body that is installed to be able to move up and down with respect to the machine body, and a chain cutter that is installed on the machine body and excavates between the vertical holes by circulating and rotating in the vertical direction, and the chain cutter is installed in the vertical direction. An excavator for connecting walls, characterized in that it is configured to be stored along the machine body by turning, or to be located at a symmetrical position on the left and right sides of the machine body.