JPH07113393A - Gantry backhoe of concrete form loaded type - Google Patents

Abstract

PURPOSE:To enhance the effectiveness in executing tunnel excavation works using a drill carriage. CONSTITUTION:A concrete form for primary covering work is loaded on a gantry drill carriage. Each form is split into an upper half fragment 22 and a left and a right lower fragment 28, 29, which can move fore and aft along a rail installed on a gantry frame 2. Holes for blasting and ones for lock bolts are bored by drifters 33, 34, 35, and the mentioned concrete form fragments 22 and 28, 29 are advanced after driving of lock bolts 36, 36,..., blasting, and exhaust of debris, and concrete is placed to the wall surface. During curing of this concrete, the next boring works are conducted, and this operating cycle of boring, blasting, and primary covering is repeated continuously.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jumbo used for tunnel construction, and more particularly to a formwork-mounted gantry jumbo capable of performing perforation and primary lining with a single unit.

[0002]

2. Description of the Related Art In tunnel excavation work using jumbo, a blast hole is opened by a drifter mounted on the jumbo, dynamite is loaded into the blast hole, and the jumbo is retracted to perform blasting. After that, along with the slide-out work, the jumbo is moved forward to build the support work, then the jumbo is retracted to introduce the spray truck etc., the primary lining to spray shotcrete on the wall surface is performed, and the spray truck again. And the jumbo are replaced and the above steps are repeated to excavate the tunnel.
A gantry jumbo in which a plurality of drifters are mounted on a gantry is known as a jumbo used for tunnel excavation of a large cross section.

[0003]

The tunnel excavation work using jumbo involves drilling and blasting with the jumbo,
There is a drawback that the work efficiency is low because the primary lining with a spray truck or the like is performed alternately and the jumbo and the spray machine are replaced near the face each time. Therefore, there is a technical problem to be solved in order to speed up the work and reduce the labor by eliminating the complicated moving work of the machine and improve the work efficiency, and the present invention solves the above problem. The purpose is to

[0004]

DISCLOSURE OF THE INVENTION The present invention is proposed in order to achieve the above object, and is a gantry jumbo in which a plurality of drifters are attached to a gantry traveling on a rail so as to be movable back and forth. A formwork-mounted gantry jumbo in which rails in the front-rear direction are arranged on the gantry, a formwork carriage is engaged with the rail, and a tunnel-covering formwork is mounted on the formwork carriage via a scaling device such as a hydraulic jack. In addition, the gantry is provided with three systems of rails and form trolleys, the tunnel lining formwork is divided into an upper half formwork and left and right lower half formwork forms, and each of the formwork dollies is divided into three parts. It provides a gantry jumbo with a formwork that can be mounted separately on and moved back and forth.

[0005]

Function: The formwork for the primary lining mounted on the gantry jumbo can be moved back and forth along the rail provided on the main body of the gantry jumbo. Move the formwork backwards,
The drifter is projected forward to pierce the face and the wall, and the face is blasted and the lock bolt is driven into the wall. After that, the drifter is retracted rearward, the mold is advanced to the vicinity of the face of the face, set on the wall surface by an expansion / contraction device such as a hydraulic jack, and concrete is poured to perform the primary lining. After the lining, the formwork is retracted, the next drilling work is performed by the drifter, and the blasting and the lining are continuously performed by one machine by repeating the above process.

Further, in the invention according to claim 2, the mold is divided into an upper mold and a lower mold, and the molds can be moved back and forth independently of each other. Therefore, a bench is formed in the lower half of the tunnel for excavation. It can be used for the bench cut method.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a formwork-mounted gantry jumbo 1,
.. are fixed to the left and right lower end portions of the gantry frame 2 of the gantry jumbo 1, respectively. Wheels 4, 4, ... Are rotatably attached to the lower portions of the legs 3, 3, .. The wheels 4, 4, ... Are engaged with rails 5, 5 arranged in the tunnel to drive a hydraulic motor or the like. A device (not shown) can be moved back and forth in the tunnel.

Rails 6, 6 are arranged in the front-rear direction on the left and right of the upper part of the gantry frame 2, and wheels 8, 8, ... Of a drifter truck 7 are engaged with the rails 6, 6. The horizontal frame 9 of the drifter truck 7 serves as a rail of the drifter boom 10, and the drifter boom 10 can move left and right on the drifter truck 7. Further, rails 13 and 14 of the lifter booms 11 and 12 are arranged on the lower left and right sides of the gantry frame 2, respectively.
Is engaged so that it can travel.

A bucket boom 16 is attached to a semicircular arc-shaped guide rail 15 arranged in the gantry frame 2 in a front view, and the bucket boom 16 can move in an arc along the arch-shaped guide rail 15. . The rails 18 and 19 of the upper half frame trolley 17 are arranged on the upper surfaces of the legs 3 and 3 of the gantry frame 2, and the upper half frame trolley 1
The wheels 20, 20, ... Of 7 are engaged with the rails 18, 19. The wheels 20, 20, ... Of the upper half frame truck 17 are mounted on the lower ends of the lifting hydraulic jacks 21, 21 ,.
The ceiling formwork 22a of the upper half part formwork 22 divided into three parts is supported by the upper end portions of the left and right lifting hydraulic jacks 21, 21 ,. At the left and right ends of the ceiling formwork 22a, side formwork 22b,
22b is pivotally attached by hinges 23, 23, ..., and is located near the lower end portions of the side molds 22b, 22b and the upper half mold carriage 17
Further, expansion / contraction hydraulic jacks 24, 24, ... Are interposed.

Further, rails 27, 27, ... Of the lower half form trucks 25, 26 are provided on the left and right side surfaces of the upper half form truck carriage 17, respectively.
, And the lower half mold trolleys 25, 26 engaging with the rails 27, 27, ... And the lower half mold halves 28, 29 are connected via hydraulic jacks 30, 30 ,. . still,
31, 31, ... Are outriggers. The function of the formwork-mounted gantry jumbo 1 having the above-described configuration as a perforator is the same as that of a general gantry jumbo, and a drifter (not shown) attached to the drifter booms 10, 11, 12 is used for cutting face and wall surfaces. Perforated and bucket 32
Can be moved to load dynamite and place rock bolts.

Next, the steps of tunnel excavation and primary lining with the formwork-mounted gantry jumbo 1 will be described with reference to FIGS. 2 and 3. Here, the process by the mini bench cut method is shown. First, as shown in FIG. 2A, the upper half mold 22 and the lower half molds 28 and 29 are positioned at the rear of the gantry jumbo 1 main body, Drifter boom 1
Drilling the central portion and the outer peripheral portion of the face by the drifters 33, 34, and 35 mounted on the Nos. 0, 11, and 12 (step 1
01).

Next, as shown in FIG. 2B, the lock bolts 36, 36, ... Are driven into the wall surface (step 102),
Load the dynamite into the holes on the face (step 10
3). Then, the gantry jumbo is retracted (step 104), blasting and ventilation are performed (step 105),
Slipping out work is performed (step 106). After that, advance the gantry jumbo 1 (step 107),
The support work is installed (step 108), the drifters 33, 34, 35 are retracted as shown in FIG. 2 (c), and the upper half mold 22 and the lower half molds 28, 29 are placed in the vicinity of the facet. Move forward to. The lifting hydraulic jacks 21, 21, ..., And the hydraulic jacks 24, 24 shown in FIG.
, 30, 30, ... are extended, the upper half mold 22 and the lower half molds 28, 29 are pressed against the wall surface, and the concrete injection port 3
The concrete is poured from 7, 37, ... to perform the primary lining (step 109), and the one cycle process from drilling to the primary lining is completed. Then, during the curing period of the concrete after the primary lining, the drifters 33, 34, 35 are moved forward to enter the next cycle, the center part of the facet is perforated, and after the curing is completed, the upper half form 22 and the lower half. Formwork 28,29
Is moved to the rear to punch the outer periphery.

In this way, the blasting and the primary lining can be continuously applied with one unit. In addition, because the primary lining concrete is placed by the formwork, the amount of dust generated in the mine is significantly reduced compared to the conventional primary lining by shotcrete spraying, and work is performed in a good working environment. it can. The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention covers those modifications.

[0014]

As described in detail in the above-mentioned embodiment, the present invention has a gantry jumbo equipped with a primary lining form frame, and the form frame can be moved back and forth with respect to the gantry jumbo body. Drilling work and blasting work by the drifter and primary lining work can be performed by one machine. Therefore, it is not necessary to move the machine in the repeated work of blasting and lining, and the labor is reduced, and a part of the punching work of the next process is performed while the formwork is set during the curing period after lining. Because it is possible to improve work efficiency significantly,
Effective in saving labor and speeding up construction.

[Brief description of drawings]

FIG. 1 is a front view of a formwork-mounted gantry jumbo.

[Fig. 2] Process explanatory diagram for tunnel excavation work using a formwork-mounted gantry jumbo.

FIG. 3 is a process flowchart of tunnel excavation work using a formwork-mounted gantry jumbo.

[Explanation of symbols]

 1 Formwork mounted gantry jumbo 2 Gantry frame 4 Wheels 5,6 Rails 13,14 Rails 17 Upper half part form truck 18,19 Rail 21 Lifting hydraulic jack 22 Upper half form frame 24 Expansion / contraction hydraulic jacks 25, 26 Lower half formwork truck 27 Rails 28, 29 Lower half formwork 30 Hydraulic jack

Claims (2)

[Claims] 1. A gantry jumbo in which a plurality of drifters are attached to a gantry traveling on a rail so as to be movable back and forth, and a rail in the front-rear direction is arranged on the gantry.
A formwork-equipped gantry jumbo characterized in that a formwork carriage is engaged with the rails, and a tunnel-covering formwork is mounted on the formwork carriage via a scaling device such as a hydraulic jack. 2. The gantry is provided with three systems of rails and formwork trucks, the tunnel lining formwork is divided into three parts, an upper half part formwork and left and right lower half part formwork parts, and each of the formwork parts is described above. The formwork-mounted gantry jumbo according to claim 1, wherein the formwork-mounted gantry jumbo is mounted on a formwork carriage so as to be separately movable back and forth.