JP2678335B2 - Underground continuous wall drilling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground continuous wall excavating device, and more particularly to an ultra-low head type underground continuous wall excavating device suitable for construction in a place where the head is limited.

[0002]

2. Description of the Related Art Conventionally, since an excavator of this type droops to excavate the ground vertically, it is generally large in height in order to maintain the vertical posture of the excavator. .
That is, the lower excavation portion and the upper guide, the frame portion containing the pump unit, etc. are integrally structured, and in consideration of vertical accuracy and the like, a length of 3 to 4 times the excavation width, for example, a width. The height was about 11m with respect to 3.2m. Japanese Utility Model Publication No. 4-37964 discloses an excavator that can be expanded and contracted in the height direction. When there is a height restriction on the excavation ground, the guide frame and the main body frame are lowered close to each other at the start of excavation. The height is increased so that the height of the hydraulic cylinder between the guide frame and the main body frame can be increased as the excavation proceeds.

[0003]

However, with the above-mentioned conventional machines, it is not possible to carry out road construction with a ceiling height of about 5 m or less, or continuous wall construction in an underground parking lot or the like. Also, in the example described in Japanese Utility Model Publication No. 4-37964, the structure in which the excavation part is integrally provided in the lower part and the frame part is integrally provided in the upper part is the same as that of the conventional machine. Had a problem that the ground surface had to be cut down in advance so that an excavator could be installed, which was a cause of high cost and long construction period.

An object of the present invention is to construct an underground continuous wall excavator capable of excavating even in an underground parking lot, under a road, and the like, even when the head limit is extremely low at about 2.5 m to 2.7 m. Is to provide.

[0005]

In order to achieve the above object, the present invention provides an excavation cutter for excavating a vertical slot in the ground, a drive source for driving the excavation cutter, and excavation of the slot. A first main body having an adjustment guide guide for correcting a position and a bend therein, a suction port for a gap generated by the excavation, and the first main body are configured separately from each other .
It was made detachable from the main body, and provided with an adjustment guide guide that corrects the position and bending during excavation of the slot, a running block for a lifting wire rope, and a submersible pump that discharges the excavation gap. A second body and the first
And a supporting device that supports the main body and the second main body, and includes a winch around which the elevating wire rope is wound.

[0006]

According to the above construction, when excavating the slot hole for the underground wall, the excavation is first performed by the first main body, and if the depth corresponding to the height of the first main body is excavated. By connecting the second body to the upper part of the first body, a vertical slot can be excavated in the ground in that state. At this time, the first body and the second body
Since the main body and the ground surface can be arranged side by side,
Even if the ceiling height of the excavation site is low, construction can be performed if the ceiling height can accommodate the height of the back of the first body or the second body.
Moreover, since the second body can be connected while the first body is excavating into the ground and the subsequent excavation can be performed as a tall connecting body, it is possible to correct the position and bend during the excavation of the slot hole. It is also easy, and therefore, it is possible to perform highly accurate excavation even at a construction site with an ultra-low head.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the present invention, in which FIG. 1 is a side view taken along the line II of FIG. 2, and FIG. 2 is a front view taken along the line II-II of FIG. It is a perspective view. As shown in these drawings, the underground continuous wall excavation device of this embodiment is connected to the first main body (excavator main body 100) that is an excavation part and above the first main body 100 as the excavation proceeds. It includes a second main body (pump unit 200) and a supporting device 300 that supports the first main body 100 and the second main body 200.
1 and 2 show a state in which the excavator main body 100 and the pump unit 200 are slightly apart from each other immediately before connection or immediately after separation.

Here, the excavator body 100 and the pump unit 200 will be described with reference to FIGS. 3 and 4. FIG. 3 is a front view of the excavator main body 100 and the pump unit 200 immediately before connection, and FIG. 4 is a front view of the connection body 400 after connection. As shown in these figures, the excavator body 10
No. 0 is provided with four drum cutters 11 for underground excavation below the frame 10, and further, a ring cutter 12 is provided for excavation of the unexposed portion between the drum cutters, and for discharging the excavated scrap. A suction port 13 is provided. The frame 10 has a prime mover 14 for driving the drum cutter 11 and the ring cutter 12 inside, and faces the wall surface of the excavated slot hole on each side surface,
Guide 15 for correcting the bending of the position and posture of 00
It has. In addition, the hanging seat 16 for hanging a wire to suspend the excavator body 100, the excavator body 100
Further, a connecting portion 18a for connecting the pump unit 200 with the connecting pin 17 and a connecting portion 19a for the hydraulic hose are provided.

Further, the pump unit 200 is provided inside the frame 20 with a submersible pump 21 for slipping discharge, a running block 23 for adjusting the hanging wire rope 22, an inclinometer 24 for detecting the posture, and the like. , The guide 15 described above in order to correct the bending of the position and posture.
A guide 25 similar to the above is provided on each side surface so as to face the wall surface of the excavated slot. In addition, a connecting portion 18b for connecting the pump unit 200 to the excavator body 100 with the connecting pin 17, and a connecting portion 19 for the hydraulic hose.
b is provided.

Next, the supporting device 3 will be described with reference to FIGS. 1 and 2.
00 and other incidental equipment will be described. The support device 300 includes a hydraulic winch 31,
A hydraulic reel 32 and the like are provided, and a turntable 33 for horizontally turning and a head sheave 35 having a slide cylinder 34 for moving the pump unit 200 are provided. Further, there is a tower 36 supporting the excavator body 100 on the base 30, and the tower 36 is provided with a hanging cylinder 37, and the hanging chain 38 provided in the hanging cylinder 37 suspends the excavator body 100. You can move up and down.
In addition, a self-propelled device 39 that enables self-propelling to the excavation site at the construction site, a fixed jack 40 that fixes the support device 300 at the excavation site, and the like are provided.

In this embodiment, the drum cutter 11 and the ring cutter 12 are driven, the submersible pump 21 is used to discharge excavation slips, and the hydraulic winch 31 is operated by hydraulic pressure. For this purpose, the hydraulic unit 41 and slip discharges are used. A soil discharge hose 42 and a hose reel 43 for accommodating the soil hose 42 are provided as incidental equipment. Although hydraulic pressure is used for various drive sources in this embodiment, it goes without saying that an electric motor may be used.

The working process of excavating a slot for a continuous wall in the ground by the operation of this embodiment will be described below with reference to FIGS. 5 to 10. In each of FIGS. 5 to 10, FIG. 5A is a front view and FIG. 5B is a side view.

First, as shown in FIG. 5, a supporting device 300.
The excavator main body (first main body) 100 and the pump unit (second main body) 200 suspended by are moved to the excavation position by the self-propelled device 39 and fixed by the jack 40.

Next, as shown in FIG. 6, the excavator main body 100 is gradually lowered using the suspending cylinder 37 and the suspending chain 38 incorporated in the tower 36 to excavate.

Next, as shown in FIG. 7, the excavator body 10
After excavating to a predetermined depth of 0, about 2.5 m in this embodiment, the pump unit 200 is prepared to move to the forward excavation position.

Next, as shown in FIG.
By operating the slide cylinder 34 of the head sheave 3
5 is moved forward, and the pump unit 200 is moved above the excavator main body 100.

Next, as shown in FIG. 9, the hydraulic winch 3
1. Operate the hydraulic reel 32 to drive the pump unit 200.
Is gradually lowered, the connecting portion 18b of the pump unit 200 is inserted into the connecting portion 18a of the excavator main body 100, and the connecting pin 17 is fixed.

As shown in FIG. 10, the lifting chain 38 is removed from the lifting seat 16 of the excavator main body 100, and the hydraulic winch 31 and the hydraulic reel 3 which are operated by the hydraulic unit 41.
2. Operate the hose reel 43, and the submersible pump 2
1. The excavator prime mover 14 and the guides 15 and 25 are also operated to perform continuous operation while rotationally excavating the drum cutter 11 and the ring cutter 12. The excavated scraps are pumped from the suction port 13 installed under the excavator body to the pump unit 20.
Through the submersible pump 21 in 0, it passes through the soil discharge hose 42 and is discharged to the ground waste treatment facility. Further, the posture control during excavation is detected by the inclinometer 24, and the guides 15 and 25 are operated to correct the posture.

As described above, according to this embodiment, since the excavator main body and the pump unit are separated, it is possible to excavate even in an ultra-low head space of about 2.7 m in head clearance during road excavation. Further, since the height of the main body after the connection is about 5 m, the guide function effectively works and the correction excavation can be smoothly performed. Moreover, the cost for construction is low because the cost of extra excavation can be reduced by preparing for excavation.

[0020]

As described above, according to the present invention, in the construction of a continuous wall such as an underground parking lot or a road, the head limit is 2.5 m or more.
Even if it is extremely low, such as about 2.7 m, it is possible to obtain an underground continuous wall excavation device that can excavate.

[Brief description of the drawings]

1 is a side view of an embodiment of the present invention, which is taken along line I- of FIG.
The line I arrow line view.

FIG. 2 is a front view of the present embodiment and is a view taken along the line II-II of FIG.

FIG. 3 is a front view of the excavator main body and the pump unit of the present embodiment immediately before they are connected.

FIG. 4 is a front view of the excavator body and the pump unit according to the present embodiment after being connected.

5A and 5B show one step of a work operation of the present embodiment, FIG. 5A is a front view, and FIG. 5B is a side view.

6A and 6B show one step of the work operation of the present embodiment, FIG. 6A is a front view, and FIG. 6B is a side view.

7A and 7B show one step of a work operation of the present embodiment, FIG. 7A is a front view, and FIG. 7B is a side view.

8A and 8B show one step of the work operation of the present embodiment, FIG. 8A is a front view, and FIG. 8B is a side view.

9A and 9B show one step of a work operation of the present embodiment, FIG. 9A is a front view, and FIG. 9B is a side view.

10A and 10B show one step of the work operation of the present embodiment, FIG. 10A is a front view, and FIG. 10B is a side view.

[Explanation of symbols]

 100 1st main body (excavator main body) 200 2nd main body (pump unit) 300 Support device 400 Connection body 10 Frame 11 Drum cutter 12 Ring cutter 13 Suction port 14 Motor 15 Guide 16 Suspension seat 17 Connection pin 18a, 18b Connection part 19a , 19b Hydraulic hose connection 20 Frame 21 Submersible pump 22 Hanging wire rope 23 Running block 24 Inclinometer 25 Guide 30 Base 31 Hydraulic winch 32 Hydraulic reel 33 Turntable 34 Sliding cylinder 35 Head sheave 36 Yagula 37 Hanging cylinder 38 For hanging Chain 39 Self-propelled device 40 Fixed jack 41 Hydraulic unit 42 Exhaust hose 43 Hose reel

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masao Arai 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Taisei Corporation (72) Inventor Katsuhiko Omura 1-6-17 Meguro, Meguro-ku, Tokyo Stock Company Toneuchi (72) Inventor Tadao Takahashi 1-6-17 Meguro, Meguro-ku, Tokyo Toneuchi Stock Company (72) Inventor Riki Terashima 1-6-17 Meguro, Meguro-ku, Tokyo Toneuchi Stock Company (56 ) References Jikkouhei 4-37964 (JP, Y2)

Claims (1)

(57) [Claims] 1. An excavation cutter for excavating a vertical slot in the ground, a drive source for driving the excavation cutter, an adjustment guide guide for correcting a position and a bend during excavation of the slot, and the excavation. A first main body having a suction port for removing the displacement caused by the first main body, and the first main body, and the first main body, and the first main body.
A second main body having an adjustment guide guide that corrects the position and bending during excavation of the slot, a running block for a lifting wire rope, and a submersible pump that discharges the excavation gap. And a support device that supports the first body and the second body and that includes a winch around which the elevating wire rope is wound.