JPH05209498A - Method and system for carrying out excavated soil in underground excavation work - Google Patents

Abstract

PURPOSE:To carry out excavated soil with high efficiency even in the case of soft ground to be excavated and also even when the width of underground pit is narrow. CONSTITUTION:In an underground excavation work to form a long underground pit T horizontally by excavating the ground G, the excavated soil D is lifted up to the space U between the ceiling slab 6 and the uppermost stage shoe 11 strut in the pit T by using a grab bucket 9. The soil D is then moved to the opening 1 along the longitudinal direction of the pit T and carried out from the opening 1 to the ground surface A by a grab lifter 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and system for discharging excavated soil in underground excavation work such as subway works.

[0002]

2. Description of the Related Art Conventionally, underground excavation work such as subway work is performed stepwise to a predetermined excavation depth by repeating horizontal excavation work. Moreover, when excavating the soft ground where the N value of the ground in the construction area is about 0 to 5, a ceiling slab is constructed by a reverse winding method at a predetermined depth position from the ground surface, and the bottom of the ceiling slab is gradually stepped. While excavating, the beams are erected in layers between the retaining walls to reinforce the retaining walls.

By the way, when the excavation site is a place where traffic is heavy day and night, the installation location of the opening is limited. In this case, therefore, the excavated soil is transported from the excavation site to the opening, and It is necessary to transport excavated soil and materials by transporting the materials and equipment from the opening to the excavation site. Therefore, conventionally, the island construction method was used to excavate from one opening to the adjacent opening with a small backhoe, and the excavated soil was collected using an earth collecting machine such as a bulldozer, a belt conveyor, or a crawler excavator. It was transported to just below.

[0004]

However, in the method of carrying out excavated soil using the soil collecting machine, for example, when the excavation width of the underground excavation is narrow, it is difficult to secure the traveling path of the machine and the island construction method cannot be adopted. ..

Further, when the ground at the excavated portion is soft, it is necessary to shorten the vertical interval between the cut beams arranged in layers, and the depth of the overdug for installing the cut beams is increased. Since it can not be made too deep, the existing beams will impede the size and work range of the machine for carrying out the excavated soil, and the operation of the machine will be troublesome and the operator will be burdened. There was a problem of increasing it. Furthermore, when the excavation site moves away from the opening, many machines are required to transport the excavated soil while relaying it, which requires a lot of manpower and damages the beams due to machine operation mistakes. However, there is a problem in that it may not be possible to efficiently carry out the excavation soil transfer work.

On the other hand, in the method of carrying out excavated soil using the belt conveyor, every time the ground is dug down by the excavating machine and a new cutting beam is installed below the existing cutting beam,
The belt conveyor must be changed under the new beam, and the changeover work becomes complicated, and the excavated soil cannot be transported during the changeover work, which hinders the efficiency of the excavation work. There is a problem. The present invention has been made in view of the above circumstances, and can carry out the excavated soil efficiently even when the excavation width of the underground mine is narrow or the ground of the excavated portion is soft. A method and system are provided.

[0007]

Means for Solving the Problems To achieve the above object, the present invention is to carry out excavation soil in an upper space in an underground pit in an underground digging work for digging the ground to form an underground pit horizontally long, In this suspended state, the excavated soil was moved to the excavated soil carry-out place along the longitudinal direction of the underground pit, and the excavated soil was carried out to the ground at the excavated soil carry-out place. Further, the present invention, a rail disposed along the upper part of the underground mine horizontally long, and lifts the excavated soil to the upper space in the underground mine, and transfers the excavated soil to the excavated soil discharge location along the rail. An excavated soil transfer device and a delivery device that is provided at the excavated soil transport device and that transports the excavated soil transported by the excavated soil transport device to the ground are provided.
Further, according to the present invention, a mountain retaining wall is driven into both sides of the underground mine, a slab is installed between the mountain retaining walls, and the rail is attached to a lower surface of the slab.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view of an underground mine used for underground excavation work using an excavated soil discharge system according to an embodiment of the present invention.
FIG. 2 is a front sectional view of the underground pit of the underground excavation work shown in FIG. In FIG. 1, 1 is formed at predetermined intervals along the line of the underground mine T that is formed long underground in the horizontal direction,
It is an opening (corresponding to an excavation soil discharge location, only one is shown in FIG. 1) having a depth from the ground A to the current excavation level L2, and an excavation soil chute 2 is provided at the bottom of the opening 1. In addition to being provided, a grab lifter 3 or the like is provided as a carry-out device that can move up and down along the opening 1.

Further, in FIGS. 1 and 2, reference numeral 4 indicates the above-ground A according to the excavation width (10 m in this embodiment) of the underground pit T.
To the final excavation level L1 is a mountain retaining wall provided in the ground G, and the crossbeam 5 and the ceiling are provided in the upper portion between the mountain retaining walls 4 and 4 excavated from the ground A to a predetermined depth. The slab 6 is installed. On the lower surface 6a of the ceiling slab 6, two rails 7, 8 are provided along the longitudinal direction of the underground mine T.
Are provided in parallel. Further, in FIG. 1 and FIG. 2, 9 is a grab bucket as an excavated soil transfer device provided movably along the rail 7, and a winch device 91 movably attached to the rail 7,
It comprises a bucket 92 which is lifted and lowered by the winch device 91. On the other hand, reference numeral 10 in the figure is an electric hoist that is provided so as to be movable along the rail 8, and a turning device 101 that is attached to the rail 8 so that it can travel, and a turning device that can turn and move up and down. The suspension arm 102 is held.

Reference numeral 11 in FIGS. 1 and 2 is a crossbeam. In this embodiment, a steel material having a total length of 5 m is used as the cross beam 11, and in consideration of the fact that the ground G is a soft ground having an N value of 0 to 5, for example, in the longitudinal direction of the underground mine T, for example, at intervals of 2 m, vertically. For example, erected between the mountain retaining walls 4 and 4 at 2.6 m intervals,
In addition, it is installed along the longitudinal direction of the underground mine T at an intermediate position of the width of the underground mine T, and in this embodiment, three steps are installed in the depth direction. Further, reference numeral 12 in the figure is an opening (not shown) adjacent to one opening 1 below the lowermost girder 11.
It is a small backhoe that excavates the ground G toward and collects the excavated soil D.

Next, the transfer operation of the excavated soil D by the excavated soil carrying-out system of this embodiment will be described. First, the ground G between the adjacent openings 1 is excavated from the ground A by any means to carry in the small backhoe 12, and the girder 5 and the ceiling slab 6 are installed, and the excavated part of the ground A excluding the opening 1 is cut. Is temporarily repaired with an iron plate B or the like. Then, using the small backhoe 12, while excavating the ground G at a depth of, for example, 2.6 m from one opening 1 to the adjacent opening (not shown), the excavated soil D is excavated by the rail. The soil is collected at a position directly below 7 at a predetermined interval, and the excavated soil D thus collected is carried to the ground A by the grab bucket 9 and the grab lifter 3.

To explain this in detail, the winch device 91
Moves along the rail 7 above the soil collection location, where
The winch device 91 lowers the bucket 92 while avoiding the existing beam 11. The lowered bucket 92 is opened and closed to grasp the excavated soil D collected, and the winch device 91 is there.
Winds the bucket 92 to the ceiling slab 6
And to the space U between the uppermost beam 11 and move the bucket 92 to the opening 1 along the rail 7 again.
The bucket 92 is opened at a position above the opening 1 and the excavated soil D inside is discharged to the excavated soil chute 2. The excavated soil D discharged to the excavated soil chute 2 is carried out to the ground A through the opening 1 by the grab relifter 3 or the like, loaded on a dump truck or the like, and transferred to a predetermined disposal site.

On the other hand, a new cutting beam 11 is installed between the mountain retaining walls 4 and 4 of the ground G portion excavated under the existing cutting beam 11. The newly installed cross beam 11 is carried into the underground mine T from the ground A through the opening 1 and mounted on the suspension arm 102 of the electric hoist 10.
The uppermost beam girder 1 with the swivel device 101 for holding 02.
By moving the space U between the ceiling slab 6 and the ceiling slab 6 along the rail 8, the beam 11 that has been carried in is transported from the opening 1 to above the installation site. The transportation of this girder 11 is
In order to avoid interference with the grab bucket 9 and in consideration of the stability of the traverse beam 11 during transportation, the longitudinal direction of the traverse beam 11 mounted on the suspension arm 102 is oriented along the longitudinal direction of the underground mine T. When the swivel device 101 reaches above the erected portion, the swivel device 101 swivels the suspension arm 102 by 90 ° in order to avoid the existing beam 11.
In this state, the suspension arm 102 is lowered to lower the girder 11 to the installation location. The down beam 11 is erected by any means.

After that, until the ground G is excavated to the final excavation level L1, the excavation of the ground G and the erection of the beams 11 are repeated to obtain a desired underground pit T.

As described above, in the excavated soil unloading system of this embodiment, the excavated soil D excavated by the small backhoe 12 is
Since the grab bucket 9 and the grab lifter 3 carry the ground G from the excavation site to the ground A through the opening 1, even when the excavation width of the underground mine T is narrow or the ground G of the excavated portion is soft, the ground G It is possible to efficiently collect and carry out the excavated soil D without being disturbed by the existing cut beam 11. In this embodiment, the rail 7 on which the grab bucket 9 is movably provided is provided on the lower surface 6a of the ceiling slab 6, but the rail 7 may be attached to an arm protruding from the mountain retaining walls 4 and 4. , The space U along the longitudinal direction of the underground mine T
The rail 7 may be provided in the. Further, although the underground pit T is formed to be long in the horizontal direction in the present embodiment, the present invention can be similarly applied to an underground pit inclined in the vertical direction. Further, the method and system for carrying out excavated soil according to the present invention is not limited to the above-mentioned underground mine excavation work, and can be applied to, for example, construction work for excavating the site to a predetermined depth, and further conveys excavated soil. Needless to say, the means is not limited to the device shown in this embodiment and can be set arbitrarily.

[0016]

As described above, according to the present invention, in the underground excavation work for excavating the ground to form a horizontally long underground pit, the excavated soil is hoisted to the upper space in the underground pit, and the hoisted state is lifted. Since the excavated soil is moved along the longitudinal direction of the underground pit to the excavated soil unloading place, and the excavated soil is unloaded to the ground at the excavated soil unloading place, the excavation width of the underground pit is narrow. Even if the ground of the excavated portion is soft, the excavated soil can be efficiently collected and carried out. Further, according to the present invention, a rail disposed along the upper part of the underground mine that is long in the horizontal direction, and the excavated soil is lifted to the upper space of the underground mine and the excavated soil is taken along the rail to the excavated soil discharge location. Since the excavated soil transfer device for transferring and the excavated soil transfer device provided at the excavated soil transfer device are provided with a transfer device for transferring the excavated soil transferred by the excavated soil transfer device to the ground, efficient collection of excavated soil, Carrying out can be realized easily.

[Brief description of drawings]

FIG. 1 is a side sectional view of an underground mine used for underground excavation work using the excavated soil unloading system according to an embodiment of the present invention.

FIG. 2 is a front sectional view of an underground mine used for the underground excavation work shown in FIG.

[Explanation of symbols]

 1 Opening part 3 Gravel lifter (carrying out device) 4 Yamadome wall 6 Ceiling slab (slab) 6a Ceiling slab lower surface (slab lower surface) 7 Rail 9 Grab bucket (excavation soil transfer device) 11 Cut beam A Ground D Excavation soil G Ground T Underground Mine U space (upper space)

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Toshio Wakabayashi 4-6-15 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd.

Claims (3)

[Claims] 1. In an underground excavation work for excavating the ground to form a horizontally long underground pit, the excavated soil is hung in an upper space in the underground pit, and the excavated soil is suspended in the longitudinal direction of the underground pit. An excavated soil discharge method in underground excavation work, characterized in that the excavated soil is moved to an excavated soil discharge location along a line, and the excavated soil is discharged to the ground at the excavated soil discharge location. 2. A rail disposed along an upper part of a horizontally underground underground pit, and hoisting the excavated soil in an upper space of the underground mine, and transferring the excavated soil to the excavated soil carrying-out place along the rail. An excavated soil transfer system for underground excavation work, comprising: an excavated soil transfer device; and a transfer device that is provided at the excavated soil transfer location and transfers the excavated soil transferred by the excavated soil transfer device to the ground. 3. A mountain retaining wall is driven into both sides of the underground pit, a slab is installed between the mountain retaining walls, and the rail is attached to a lower surface of the slab. The excavated soil unloading system for underground excavation work according to claim 2.