JP2768112B2 - Tunnel excavator and tunnel excavation 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 tunnel tunnel excavator and a tunnel excavation method, and more particularly, to a work vehicle having an excavator body moving forward while cutting ground and various facilities following the excavator body. And a tunnel excavation method using the excavator.

[0002]

2. Description of the Related Art For example, a tunnel tunnel boring machine (hereinafter referred to as TBM) has been known as a tunnel tunnel machine which excavates the entire cross section of a tunnel at once by a mechanical excavation method without using blasting for tunnel excavation. ing.
This TBM is provided with an excavator body at the tip and a work carriage for placing and moving various facilities following the excavator body, and the ground around the tunnel is reacted by a gripper attached to the excavator body as a reaction force. Drilling a tunnel while advancing. After the excavation of the tunnel, the inner peripheral surface of the tunnel is protected by spray lining with a spray material such as concrete.

[0003]

However, when a tunnel is constructed using a tunnel machine such as a TBM, particularly when the cross section of the tunnel is small, the cross section of the tunnel is reduced by a work vehicle following the excavator body. Because of the occupancy, it is not possible to perform a spraying operation with a spraying material such as concrete on the inner peripheral surface of the tunnel in parallel with the excavation operation immediately after the excavator body. Therefore, such a spraying operation is performed after the tunnel has been penetrated, so that the construction period of the tunnel construction as a whole is prolonged, and there is a problem in that a large cost is required. In addition, the inner surface of the tunnel cannot be protected immediately after the excavation. There was a problem of coming.

Accordingly, the present invention has been made to solve the above-mentioned problem, and it is possible to perform a spraying operation immediately after an excavator body, so that a tunnel excavation and a spraying operation can be performed simultaneously. At the same time, a tunnel tunnel excavator and tunnel excavation method that can achieve early stabilization of the ground, shorten the construction period, and reduce the construction cost by easily preventing skin fall, collapse etc. of the ground on the inner peripheral surface of the tunnel The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned object, and its gist is to provide an excavator body for cutting a ground by bringing a cutting blade into direct contact with a face face, A tunnel boring machine, which is provided with a power bogie for the excavator main body and a discharge treatment facility for excavated earth and sand, etc., following the excavator main body, and excavates a tunnel while moving the excavator main body forward. An excavator is provided with lining spraying means between the excavator body and the succeeding work vehicle, and the blasting means is arranged to face a lining surface on the inner periphery of the tunnel, and the excavator body works with the excavator body. A tunnel excavator is characterized in that connection equipment such as piping for communicating with various facilities on a bogie is provided below the spraying means.

Here, the tunnel machine according to the present invention may be provided with a facility for producing and supplying concrete, preferably between the spraying means and the work vehicle.

Further, in the tunnel machine according to the present invention, the work vehicle is arranged so as to approach one of the right and left regions of the tunnel section, and the other region is provided with a concrete material from behind the work vehicle. It is also possible to run a material transport vehicle that transports to the production and supply facility.

Further, in the tunnel machine according to the present invention, concrete may be transported to the spraying means or the concrete material to the concrete making and supplying facility by using a pipe bell-con.

Another aspect of the present invention is to provide an excavator main body for cutting the ground by bringing a cutting blade into direct contact with a face face, an operating facility for the excavator main body and an excavated earth and sand which follows the excavator main body. In a tunnel excavation method using a tunnel excavator that excavates a tunnel while moving the excavator main body forward, the excavator main body and the subsequent work bogie are provided. Arrange blasting means for lining in between, by the blasting means after the end of one step of digging work by the machine body ,
Concrete on the exposed inner surface of the tunnel immediately after the machine
Repeat or take the spraying work
Do excavation and spraying work in parallel
The tunnel excavation method is characterized by sequentially constructing tunnels.

[0010]

[0011]

In the tunnel machine according to the present invention, the lining spraying means is provided immediately after the machine body. That is, a work area for spraying work is provided between the excavator main body and a work carriage subsequent to the excavator body, and the spraying means is installed here. The spraying means is disposed so as to be able to face the entire area of the lining surface so that spraying can be performed on the lining surface on which concrete or the like is to be sprayed on the inner circumferential surface of the tunnel, for example, the entire inner circumferential surface except for the invert portion of the tunnel. Is done. And, in the work area, a power facility on the excavator body and the work vehicle,
To connect functions with various facilities such as emission treatment facilities,
The connection equipment such as the power pipe, the drain pipe, and the water pipe is disposed in a predetermined area below the spraying means, that is, in an area where the space between the lining surface and the spraying means is not obstructed. Immediately after the excavator body that cannot enter the tunnel, the spraying operation can be immediately performed on the inner peripheral surface of the tunnel exposed after excavation to protect the tunnel.

Further, in the tunnel excavation method of the present invention, the excavation operation for one process by the excavator body and the spraying operation immediately after the excavation operation can be performed simultaneously or alternately, so that these parallel operations are facilitated. .

[0013]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

The TBM 10 of this embodiment shown in FIG.
Work in which the excavator main body 11 located at the tip of the M10, the power facility or operation facility that operates the excavator main body 11 subsequent to the excavator main body 11, or a discharge treatment plant for discharging excavated earth and sand are mounted. Dolly 12 and machine 1
A spray plant 13 for spraying concrete on the inner peripheral surface of the tunnel provided between the work vehicle 1 and the work vehicle 12.

The excavator body 11 has the same form as that of the conventional excavator body constituting the TBM. For example, a front gripper and a rear gripper provided at the front and rear portions of the excavator are expanded and contracted to form a ground around the tunnel. , The excavation reaction force is taken, and the ground moves forward while cutting the ground by the so-called scale insect method. The work cart 12 also has the same configuration as that used in the conventional TBM.

The spraying plant 13 includes a rotary spraying machine 14 located immediately after the machine body 11.
And a concrete supply device 15 for feeding concrete to the rotary spraying machine 14 and a continuous kneading concrete plant 16 for producing concrete.

As shown in FIG. 2, the rotary spraying machine 14 has a movable frame 21, a spraying machine main body 20 attached to the front end of the movable frame 21 so as to be able to advance and retreat, and connected to the spraying machine main body 20. Docking hose 22 and steel pipe 23 for feeding concrete, and hose guide 2 for supporting them
And 4. The spraying machine main body 20 has an impeller 25 rotatably fitted to the tip thereof, and projects concrete from a projection pocket on the outer periphery thereof. Since the projection pockets are radially opposed to each other over the entire inner peripheral surface of the tunnel, if there is no obstacle between this and the inner peripheral surface of the tunnel, concrete is blown to an arbitrary position on the inner peripheral surface. Can be attached. The concrete projection direction is controlled by an adjustment sleeve disposed inside the impeller 25. Further, a swinging elevating device 26 for swinging or raising and lowering the spraying machine main body 20 is attached below the spraying machine main body 20, and the spraying machine main body 20 moves forward and backward along the movable frame 21, and thereby, Concrete can be easily sprayed to an arbitrary position in the spraying area 40 (see FIG. 1) immediately after the excavator body 11. The docking hose 22 is made of a flexible material and slides along the hose guide 24. For example, when the spraying machine body 20 moves forward along the movable frame 21, the docking hose 22 is indicated by a virtual line in the figure. The spraying machine body 20 is continuously deformed until it reaches the state.
, The supply of concrete to the spraying machine main body 20 is not hindered.

In the spraying area 40, as shown in FIG. 3, the entire inner periphery of the tunnel except the invert concrete portion 27 which is previously cast for laying a rail, etc., as a lining surface on which concrete is to be sprayed. Surface 41,
Equipment for connecting the excavator main body 11 and various facilities on the work vehicle to function them so as not to block between the impeller 25, for example, a power pipe, a water pipe, a drain pipe, a collection pipe. The connection equipment 28 such as a dust duct is connected to the spraying machine main body 20.
In a predetermined area below the That is, an arrangement cover 29 is installed between the pair of movable frames 21 below the spraying machine main body 20, and the connection equipment 28 is arranged here. In addition, a belt conveyor may be used as a means for discharging excavated earth and sand, and may be disposed in the disposing cover 29.
The connection equipment 28 does not necessarily need to be disposed in the disposing cover 29 as long as it does not block the space between the impeller 25 below the spraying machine main body 20 and the lining surface.

The concrete supply device 15 following the rotary spraying machine 14 is constituted by a concrete pump 30 and a quick-setting agent supply device 31, as shown in FIG. Then, the quick-setting agent supply device 31 connects the concrete pump 30 and the steel pipe 23 of the rotary spraying machine 14 to a concrete delivery pipe 32 which connects the concrete pump 30 and the quick-setting agent in the concrete fed to the rotary spraying machine 14. Mix the ingredients.

Further, as shown in FIG. 4, the continuous kneading concrete plant 16 for producing concrete includes a material measuring device 32, a belt feeder 33, and a mixer 34.
And The material weighing device 32 includes a container 42 such as a cement bottle, an aggregate bottle, a water tank unit, and an admixture tank unit, and weighs cement, aggregate, and the like so that concrete has a predetermined mixture. Is conveyed by a belt conveyor 35 or the like, and is
Through the mixer 34. The mixer 34 has a screw therein, and by rotating the screw, continuously mixes and conveys the concrete, and puts it into the concrete pump 30 (see FIG. 1). Note that a hydraulic unit 36 is attached to the rear of the material measuring device 32 to operate these devices.

Then, in order to enable continuous kneading of the concrete, the material measuring device 32 is successively supplied with various types of concrete materials such as aggregate so as not to run short. That is, the continuous kneading concrete plant 16
As shown in FIG. 5 showing the BB cross section of FIG. 4, a material transport vehicle 37 which is arranged near one of the left and right regions of the tunnel cross section and transports the concrete material to the other region.
(See FIG. 6). Then, as shown in FIG. 6 showing a cross section taken along the line CC of FIG. 1, the work cart 12 on which the various facilities are mounted moves along the rail 43 laid in one area of the tunnel cross section and the other. The material transport vehicle 37 moves on the rails 44 laid in the area, thereby sequentially transporting the concrete material stocked behind the work vehicle 12 to the material measuring device 32.

In this embodiment, the concrete material is conveyed to the continuous kneading concrete plant 16 by a material carrier, but may be conveyed by using a pipe conveyor. Alternatively, the concrete can be kneaded behind the work cart 12 and directly conveyed to the concrete supply device 15 by a pipe bell-con.

According to the TBM 10 having such a configuration, the exposed ground immediately after the excavator body 11 can be lined immediately. That is, the excavator body 1
When the excavation operation for one process by the expansion and contraction of 1 is completed, the excavator body 11 is advanced by one span by the operation of the grippers provided on the front and rear portions thereof, and the excavation operation of the next process is performed. Simultaneously or alternately, in the spraying area immediately after the excavator main body 11, concrete is projected from the impeller 25 onto the lining surface while moving the sprayer main body 20 back and forth. Protect the inner surface of the tunnel exposed by the advance. Then, these operations are repeated, and the concrete material is sequentially supplied to the continuous kneading concrete plant 16. Therefore, the tunnel is constructed while sequentially excavating the tunnel and spraying the inner peripheral surface of the tunnel. can go.

[0024]

As described above, according to the tunnel excavator and the tunnel excavation method of the present invention, the lining spraying means is provided between the excavator main body and the following work vehicle, and The means is disposed facing the lining surface of the inner periphery of the tunnel, and various pipes and the like are arranged in a region below the spraying means, which does not block between the spraying means and the inner periphery of the tunnel. Spraying work immediately after the tunnel can be easily performed. Therefore, the tunnel excavation and spraying work can be performed simultaneously, and the collapse of the ground on the inner peripheral surface of the tunnel can be prevented. Stability, shortening of construction period and reduction of construction cost can be easily achieved.

[Brief description of the drawings]

FIG. 1 is a partially cut-away schematic longitudinal sectional view showing one embodiment of a tunnel machine according to the present invention.

FIG. 2 is a schematic side view showing one embodiment of a spraying means.

FIG. 3 is a sectional view taken along the line AA of FIG. 1;

FIG. 4 is a side view showing an embodiment of a facility for producing and supplying concrete.

FIG. 5 is a sectional view taken along the line BB of FIGS. 1 and 4;

FIG. 6 is a sectional view taken along the line CC of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 TBM 11 Excavator main body 12 Work vehicle 13 Spraying plant 14 Rotary spraying machine 15 Concrete supply device 16 Continuous kneading concrete plant 20 Spraying machine main body 25 Impeller 28 Connection equipment 37 Material carrier 40 Spraying area 41 Lining surface

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Fukuda 2-3-3 Kandaji-cho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (58) Field surveyed (Int.Cl. ⁶ , DB name) E21D 9 / 06 301 E21D 11/10

Claims (2)

(57) [Claims] An excavator body for cutting the ground by bringing a cutting blade into direct contact with a face face, and a power facility for the excavator body, a discharge treatment facility for excavated earth and sand, etc., following the excavator body. A tunnel excavator, comprising a work carriage and excavating a tunnel while moving the machine body forward, wherein the tunnel machine is sprayed for lining between the machine body and the subsequent work carriage. With means,
And the spraying means is arranged to face the lining surface of the inner periphery of the tunnel, and connection equipment such as pipes for connecting the excavator main body and various facilities on the work cart is provided below the spraying means .
A tunnel excavator, which is disposed on the side . 2. An excavator body for cutting the ground by bringing a cutting blade into direct contact with a face face, and an operating facility for the excavator body, a facility for discharging excavated earth and sand, etc., following the excavator body. In a tunnel excavation method using a tunnel excavator, which excavates a tunnel while moving the excavator main body forward, a spraying means for lining is provided between the excavator main body and the subsequent operation bogie. After the excavation work for one process by the excavator body is completed,
By the spraying means, the exposed toe immediately after the excavator body is exposed.
Spraying concrete on the inner surface of the
Repeat or combine such excavation and spraying operations
A tunnel excavation method characterized by building tunnels one after another .