JPH08338198A - Tunnel excavating and lining device and tunnel internal surface concrete lining method - Google Patents

Abstract

PURPOSE: To perform primary lining with concrete immediately after excavating a natural ground so as to increase work efficiency and reliability. CONSTITUTION: A tunnel excavating and lining device is formed with an end mold frame made in contact with a joint surface in lateral direction of concrete deposited in cylindrical form and a surface mold frame made in contact with the inner surface of concrete. Also multiple partial mold frames (10a, 10b, and others) are interconnected to each other by universal connection parts. Then it is provided with a mold frame 10 for lining concrete on the inner surface of a tunnel which is provided with column members with vertically supporting jacks. The upper part of the mold frame 10 is inclined forward relative to the lower part of it. The method for lining concrete on the inner surface of the tunnel uses the mold frame 10. Foaming substance is sprayed in a clearance between the end mold frame and the tunnel excavating natural ground to cure and form a part of the end mold frame. Then concrete is deposited.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gantry frame, a mechanical equipment such as a mechanical excavator, an excavated earth and sand carrier, a perforator, and a work table, and a dust generation and concrete in tunnel construction. An excavation lining device for tunnels that is equipped with a concrete lining formwork that eliminates bounce loss and that can perform a quick primary lining when performing concrete lining on an excavated wall surface, and The present invention relates to a concrete lining method for the inner surface of a tunnel.

[0002]

2. Description of the Related Art In conventional mountain tunnel construction using NATM, a required cross-sectional shape was excavated by a blasting method drill jumbo drilling machine, a mechanical free-section excavator, a power shovel, or other shear loading carrier. After that, the concrete is sprayed as early as possible by a concrete spraying machine, a spraying robot, etc., and the concrete and the lock bolt are closely supported on the rock mass as main supporting members to carry out the primary lining. Then, these mechanical devices carry out the construction by repeating the forward and backward movement toward and away from the face. In the primary lining of concrete, a method is mainly adopted in which raw concrete is pressure-fed by compressed air, etc., a quick-setting agent is added near the front of the nozzle, and sprayed toward the excavated rock mass. Has been. By such NATM, the looseness of the ground is suppressed to the minimum, the supporting ability is effectively exerted, and the observation results and measurement results of the ground after tunnel excavation are fed back to the design and construction, depending on the ground. It has become possible to form a proper support and to proceed with tunnel construction that is rational, economical and safe.

In the primary lining by the above-mentioned spray concrete method, a large amount of dust rises when the concrete is sprayed on the ground at high pressure, or material loss occurs due to so-called rebound when the spray material bounces off the ground. However, there is a problem that the working environment deteriorates. In order to solve these drawbacks, a concrete lining formwork (hereinafter referred to as NTL formwork) for the inner surface of the tunnel has been proposed as a primary lining work method that is rational, economical, and considers the working environment. ing. In this NTL method, instead of using a rapid-hardening spray concrete, the primary lining should be formed by placing a concrete with fluidity and rapid-hardness between the special form and the ground. It is what As this NTL construction method, a circumferentially moving form system using an endless belt, a center form system, a partial center form system, etc. have been proposed.

Even in the conventional NTL method, when a tunnel is to be excavated, it is excavated into a required cross-sectional shape by a blasting method drill jumbo rock drill, a mechanical free-section excavator, a power shovel, a shear loading machine, or the like. It is necessary to make a primary lining on the rock surface of Higashiyama with concrete. That is, at the time of the primary lining, after excavating with an excavating machine and method corresponding to the natural ground, it is mounted on a traveling carriage driven by an internal combustion engine or the like and mounted on a boom that can be lifted, swung, and stretched. Primary lining is performed by the concrete placing device installed on the roof frame. In this case, the rail frame has a radius of curvature substantially equal to that of the excavated tunnel rock surface.

[0005]

In the method of feeding the concrete placing device for the primary lining, various rock drilling machines for excavating rock mass into a predetermined cross-sectional shape by blast excavation, mechanical excavation, etc. It is necessary to carry out complicated operations such as loading and unloading machines for loading and unloading sand, sand, rocks, etc., and loading and unloading concrete placing devices. For this reason, the time until the primary lining after the excavation to a predetermined cross-sectional shape becomes long, and therefore the ground deformation due to the expansion of the loosened area of the ground becomes large, and the time for the ground excavation surface to contact the air is also long. There was a problem that the weathering and deterioration of the background progressed. In particular, if the front face in the tunnel is almost vertical, the upper part of the front is likely to collapse and it is difficult to straighten it, so a so-called "nuclear leftover" that holds a part of the bedrock in front of the face is necessary. In addition, auxiliary techniques such as driving a rock bolt and spraying concrete were required for the face.

The present invention has been made in view of the above-mentioned problems, and is equipped with various excavating machines, concrete spraying machines, and unloading devices for earth and sand, rocks, etc. It is an object of the present invention to provide a tunnel excavation method and a lining apparatus and a device thereof that can perform primary lining and have high work efficiency and reliability.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a tunnel excavation lining device which is in contact with a transverse joining surface of a concrete which is placed in a tubular shape. Comprised of a gable form and a surface form contacting the inner surface of the concrete, a plurality of partial forms are connected by a universal joint, and an expansion mechanism (for example, a jack mechanism) for vertically supporting the form (10) is provided. It is characterized in that it is provided with a formwork device for concrete lining on the inner surface of the tunnel having a pillar member. In addition, the tunnel excavation lining equipment is
The formwork device for concrete lining on the inner surface of the tunnel comprises a gable formwork which contacts the transverse joining surface of the concrete that is cast in a cylindrical shape and a surface formwork which contacts the inner surface of the concrete. And a plurality of partial formwork (10
a, 10b) are connected to each other, and an auxiliary formwork (10c) is provided at the lower end of the partial formwork (10b) so that the auxiliary formwork (10c) can expand and contract in the in-plane direction of the formwork by overlapping with the partial formwork (10b). Characterize. In addition, the tunnel excavation lining equipment
The formwork device for concrete lining on the inner surface of the tunnel comprises a gable formwork which contacts the transverse joining surface of the concrete that is cast in a cylindrical shape and a surface formwork which contacts the inner surface of the concrete. A plurality of partial molds are connected to each other by the flexible joint portion, and an expansion / contraction mechanism (for example, a jack mechanism) that vertically supports the mold (10) is movably mounted on the gantry frame (1). Is characterized by. Further, the excavation lining device for a tunnel is characterized in that the concrete lining form device for the inner surface of the tunnel is provided with a nozzle for ejecting a foamable substance in the end form (27). Alternatively, in the excavation lining device for a tunnel, the formwork device for concrete lining on the inner surface of the tunnel is provided with an auxiliary arm at the distal end of the gantry frame so that the auxiliary arm can extend and contract. The arm is extended so that it can be moved to the tip of the arm. Furthermore,
The excavation lining device for a tunnel is characterized in that the concrete lining form device on the inner surface of the tunnel has an upper part inclined to the front part with respect to a lower part of the form. Further, the excavation lining device for a tunnel is characterized in that the formwork device for concrete lining on the inner surface of the tunnel is provided with a concrete extrusion nozzle in the circumferential direction. Alternatively, the method for lining concrete on the inner surface of the tunnel is characterized in that it is carried out by using the above-mentioned frame device for concrete lining on the inner surface of the tunnel. Further, the concrete lining method for the inner surface of the tunnel is such that a foamable substance is sprayed into the gap between the gable formwork (27) and the ground surface of the tunnel excavation to harden the gable formwork to form a part of the gable formwork. It is characterized in that a concrete for lining the inner surface is placed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view of an excavation and lining apparatus for carrying out the tunnel lining and lining method of a tunnel inner surface of the present invention, and FIG. 2 is a side view thereof. FIG. 3 is a plan view of the first half of the tunnel excavation and lining apparatus of the present invention in which the NTL frame 10 is moved to the tip of the gantry frame 1, and FIG. 4 is a side view of the first half. Is A in FIG.
FIG.

Reference numeral 1 denotes a gantry frame (steel frame), which is a hydraulic breaker 2 for rock cutting the rock mass of the natural ground (a boom cutter may be used), a perforator 5 for boring a hole in rock, A spraying robot 6 for spraying a concrete on the excavated rock mass if necessary, a cage 7 for mounting a worker, an NTL frame 10 movable back and forth, and the like are mounted. In addition, the sled loading machine 3 for scraping rock, rocks, gravel, earth and sand, etc., which can be drilled, is capable of self-propelled inside the gantry frame 1.

The hydraulic breaker 2 is mounted so as to be movable back and forth, up and down, and left and right, and a rock drilling chisel 2a is attached to a tip end portion thereof. Further, the hydraulic breaker 2 is an NT which will be described later.
The L-frame 10 can be slid backward by a certain amount so as to be retracted so as not to get in the way when moving forward and advancing. The boring machine 5 pierces a hole for embedding a rock bolt, pierces a soft rock bed with holes for injecting a reinforcing bolt or a hardening agent, or pierces a hard rock bed with a hole for dynamite insertion. This is the device to be used. The spraying robot 6 is used when spraying a reinforcing material such as concrete to prevent the excavated surface from collapsing. These punches 5
And spray robot 6 and mange 7 are gantry-free.
It is installed on the rails 11, 12, and 13 so that the work can be performed by advancing to the front end of the frame 1.
The NTL formwork 10 is provided with a nozzle 30 for concrete extrusion for placing a concrete for primary lining on the excavated rock mass surface in the circumferential direction, and as will be described later, a gantry frame. The main girder 20 provided on the upper part of the gantry frame 1 can be reciprocated up to the tip of the frame 1.

From the central portion to the rear portion of the tunnel excavation and lining device of the present invention, the conveyor 8 from the slid loader 3 is used.
A separate conveyor 9 is arranged to further convey the earth and sand and the rock conveyed via the vehicle, and is loaded on a dump truck and carried out to the outside. Further, a dust suction / exhaust duct 15 is arranged from the gantry frame 1 installed in the tunnel to the outside of the rear tunnel.
The dust generated around the hydraulic breaker 2 and the punching machine 5 is sucked and discharged.

Main girders 20, 20 supported by columns 1a, 1b, 1c, etc. are disposed on both upper sides of the gantry frame 1, and rails 22, 20 are provided on the upper surfaces of the main girders 20, 20. Two
There are 2 facilities. Further, the main girders 20 of the gantry frame 1 are provided with auxiliary arms 21 and 21 connected to each other by a connecting beam 21a at the front ends thereof, and a driving device (not shown). For example, hydraulic cylinder or motor
A pinion / rack mechanism or the like which is driven by a rotor can be used to extend and retract a predetermined distance forward (see FIGS. 8 to 9 for the auxiliary arm 21 and the connecting beam 21a). The auxiliary arm 21 is the NT
This is for moving the L-frame 10 further forward than the gantry frame 1.

The NTL mold 10 is a mold having a mold surface having a curvature that is the same as or similar to the curvature of the primary lining surface, and is tilted so that the upper portion is located forward with respect to the lower portion as a whole. It has a slanted formwork. As shown in FIG. 5, the inclined NTL mold 10 is composed of a three-part frame body including an upper mold 10a of a partial mold and lower molds 10b and 10b on both left and right sides (these are divided into three parts). However, the upper mold 10a and the lower molds 10b and 10b on both sides are pivotally attached by pin hinges 24 and 24, respectively. Also, the upper mold 10a and the lower molds 10b on both sides,
Cylinders (which may be either hydraulic cylinders or air cylinders) 25, 25 are installed at the connecting portion with 10b. The main body side of these cylinders 25, 25 is on the upper formwork 10a side, and the cylinder rod side is on the cylinder rod side. Lower formwork 10b, 10
Mounted on the b side (may be reversed). When these cylinders 25, 25 are operated in this manner, the lower mold forms 10b, 10b rotate about the pin hinges 24, 24 as shown by arrows so as to be rotatable within a certain range. Further, at the lower end portions of the lower molds 10b and 10b, telescopic molds 10c and 10c, which are separate auxiliary molds that can be taken in and out, are cylinders (either a hydraulic cylinder or an air cylinder may be used).
It is stored so that it can be expanded and contracted by 26, 26. In addition, a continuous elastic body (for example, sponge rubber) type end mold 27 is provided on the upper end mold 10a and the lower mold 10b of the NTL mold 10 on the outer end of the front end.

Next, a frame structure for supporting the upper mold 10a and the lower molds 10b and 10b on the left and right sides will be described. FIG. 6 is a side view of a frame for integrally fixing to the NTL mold 10, FIG. 7 (A) is a partial plan view of a traveling device attached to the NTL mold 10, and FIG. 7 (B) is a side view thereof. It is a figure. The NTL form 10 is a semi-circular inclined NTL form in which the upper part is inclined to the front with respect to the lower part. The upper form frame 10a and the lower form frames 10b and 10b on the left and right sides. Must have a frame structure that can withstand the load from the outside. That is,
The upper mold frame 10a has a side view of the upper mold frame 10a.
An auxiliary mold 10e having the same inclination as that fixed to the inner peripheral surface of the upper mold 10a is provided. Also,
A semi-circular frame 40 having the same curvature as that of the auxiliary mold 10e is arranged behind the upper mold 10a. The semi-circular frame 40 and the auxiliary mold 10e are arranged above each other. -A frame 41 and a connecting frame 42 are connected.
The upper frame 41 is also fixed to the inside of the upper connecting frame 43, which is erected on the inside of the upper frame 10a for reinforcement, and to the lower side of the upper frame 10a.

Inside the lower mold 10b, the auxiliary mold 10e, the semicircular frame 40, and the hinge portions 44 and 45 are provided.
Columns 46 and 47 pivotally attached to each other are vertically arranged. The struts 46 and the struts 47 are connected by a connecting frame 48, and the struts 46 and the lower formwork 10 are connected.
It is connected to b with a connecting frame 49. Further, the lower ends of the columns 46 and 47 are fixed to a pedestal 50 placed on the support jack 28 of the lower mold 10b.

The lower formwork support jack 28 of the NTL formwork 10 is provided with a lateral feed device, and when the NTL formwork 10 is moved forward, the vertical, lateral, front and rear positions of the NTL formwork 10 are adjusted. It is for doing. Therefore, an adjusting device 29 is provided below the lower formwork supporting jack 28. Further, concrete casting nozzles 30 are arranged at predetermined angular intervals on the upper mold 10a and the lower molds 10b and 10b of the inclined NTL mold 10, respectively. From the concrete-placing nozzle 30, the concrete is jetted by a pump (not shown) during the primary lining.

The inclined NTL frame 10 is a traveling device (moving saddle 31 and traveling wheels 3) for moving back and forth.
2 and the traveling drive unit 33, etc.) are provided. That is, the main girders 20 and 2 provided on the upper part of the gantry frame 1
Rails 22 and 23 are installed on the 0.
The wheels 3 provided on the traveling saddle 31 are mounted on the wheels 22 and 23.
2 and 32 are mounted, the traveling saddle 31 has saddle connecting members 34, 3 as shown in FIGS. 6 and 7A.
Connected at 4. The wheels 32 are driven by a traveling drive unit 33 (for example, a hydraulic motor and a gear drive mechanism). Further, four frame support jacks 36 for driving the upper frames 41, 41 in the vertical direction are installed near both ends of the saddle connecting members 34, 34. These formwork support jacks 36 are NTL at the most appropriate position.
In order to move the mold 10 up and down, it is driven to the left and right by the transverse feed device 37 installed on the saddle connecting member 41 via the male screw rod 38. It should be noted that the slide cylinder 39 is used to move in the front-rear direction. Incidentally, the traveling drive unit 33
The power for driving the horizontal feed device 37, etc. is the hydraulic unit 35.
Supplied by

Between the gantry frame 1 and the lower molds 10b, 10b, cylinders 51, 51 for receiving concrete lateral pressure are installed on both sides. The cylinders 51, 51 are the same as the NTL frame 10 during the primary lining.
It is for firmly supporting the lower molds 10b, 10b in the lateral direction. In this case, rods 53, 53 are case 5 provided on both side surfaces of the gantry frame 1.
2, 52 (see FIG. 1 or FIG. 3) are retractably housed by a driving device, and an auxiliary arm 21 for advancing the NTL mold 10 is extended as described later, and is extended during concrete lining. I am doing it. Then, the NTL mold 10 is advanced to move the rods 53, 53 and the lower molds 10b, 10
The cylinders 51, 51 are set between them and b so as to receive the reaction force generated when the concrete is poured into the surroundings.

FIG. 8 is a plan view and FIG. 10 (A) is a gantry.
A partial plan view of the tip of the frame 1 is shown in FIG.
1 is a side view of the mold 10 moving on the gantry frame 1, FIG. 10A is a partially enlarged plan view of the main girder 20, and FIG.
0 (B) is a sectional view taken along the line XX in FIG. 10 (A). As described above, the NTL mold 10 has the upper frame 4
It is mounted on traveling saddles 31, 31 to which wheels 32, 32 are attached via 1 and support jacks 36, 36. The wheels 32, 32 are the main girders 2 above the gantry frame 1.
It is mounted on rails 22 and 22 installed on the upper surface of 0 and 20. In addition, the auxiliary arm 21 built in the main girders 20 and 20.
There are also rails 23 and 23, but the rail 2
3 and 23 are rails 2 installed on the main girders 20 and 20.
2, 22 and certain sections are doubled. Since the rails 23, 23 on the side of the auxiliary arm 21 must be moved, the upper surfaces of the main girders 20, 20 have long grooves 20a, 20.
a is drilled, and the rails 23 on the side of these auxiliary arms 21 and
23 is installed so as to project above the long grooves 20a, 20a and to be at the same height as the rails 22, 22 installed on the main girders 20, 20. The width of the wheels 32, 32 mounted on the NTL frame 10 is such that both of the rails 22 and 23, which are doubly installed, fit at the same time. If the auxiliary arm 21 is extended in this way, N
The TL form 10 can be moved further to the front end portion of the gantry frame 1 to a position just before the face of the face.

Next, FIG. 11 (A) is a partial sectional view of the case where the excavated tunnel inner wall is primarily covered with an NTL frame. A plurality of holes 27a are formed in the gable form 27 which is provided around the outer periphery of the front end of the inclined NTL form 10, and a nozzle 61 for ejecting the foaming agent is passed through the hole 27a. A hose 60 is connected to the nozzle 61, and when the inner wall of the tunnel is actually subjected to the primary lining by concrete, the inclined NTL frame 10 is set forward to set the hose 60 and the nozzle. The foaming agent 62 is ejected through a gap 61 formed between the gable form 27 and the tunnel inner wall surface 55 through 61. Then, when the foaming agent 62 is solidified, the concrete is provided in the space 57 between the NTL mold 10 and the tunnel inner wall 55 at several places around the outside of the NTL mold 10.
Nozzle 30 for touring and concrete 6 for primary lining
3 is jetted and filled. In addition, the hole 2 is formed inside the gable form 27.
Alternatively, the foaming agent 62 may be ejected through the nozzle 61 and the hose 60, which are exposed to the outside from the front side of the end form 27 without forming the hole 7a.

The reason why the foaming agent 62 is jetted and filled in the gap 56 formed between the end form 27 and the tunnel inner wall surface 55 as described above is as follows. That is, during excavation of the tunnel, the inner wall surface 55 of the tunnel rarely becomes a clean circular shape, and in most cases, the ground is uneven. Therefore, when the inner wall surface 55 of the tunnel is largely excavated to form the recess 55a as shown in FIG. 11B, the foaming agent 62 is jetted to the recess 55a by the end form 27 to eliminate the filling gap and then the concrete is removed. The jet 63 is spouted. In this way, it is normally better to place the concrete after the gable form 27 comes into contact with the inner wall surface 55 of the tunnel to form a sealed state, but in most cases such a state is not possible. The gable form 27 is used to fill the unevenness of the ground with the foaming agent 62 while reducing the gap 56 as much as possible. It should be noted that, as shown in FIG. 11 (C), the NTL form 10 is not provided with the end form 27 at the outer peripheral end thereof.
Holes 10f for blowing the foaming agent 62 at several places around the periphery of the mold 10
It is also possible to provide and make it eject.

The excavation lining apparatus for the tunnel and the concrete lining method for the inner surface of the tunnel have the above-mentioned constructions, and the operation thereof will be described below. (1) When excavating a tunnel, the rock mass is excavated by the hydraulic breaker 2 mounted on the gantry frame 1, the conveyor 8 and the like, and the rock bolt or the hole for the dynamite is perforated by the perforator 5 if necessary. Installed and spraying robot 6 on the excavation surface
To spray concrete to reinforce the excavated surface. In this case, the NTL frame 10 is made to stand by behind the gantry frame 1. (2) Hydraulic excavation after digging the rock mass at a predetermined interval.
The mosquito 2 is moved to the rear inside the gantry frame 1. The punching machine 5 and the spraying robot 6 are housed within the width and height of the gantry frame 1. (3) Next, the upper main girders 20 and 2 of the gantry frame 1
The auxiliary arm 21 built in the front part of 0 is projected and fixed near the face of the face. In addition, the rod 53 is also case 5
Make it more than 2 Then, the driving device (not shown) moves the NTL frame 10 to the tip of the auxiliary arm 21. (4) Cylinders 25 mounted between the upper mold 10a of the NTL mold 10 and the left and right lower molds 10b, 10b
5 is operated to extend the lower molds 10b and 10b to the left and right, the support jacks 36 and 36 are operated to set at predetermined positions, and the cylinders 26 and 26 are further operated to ground the telescopic molds 10c and 10c. . The lower formwork support jack 28 is also grounded to the ground. Further, the adjustment device 29 of the lower formwork support jack 28 adjusts the vertical, horizontal, and front-back positions. (5) The cylinder 51 for pressure reaction on the concrete side is operated to support the side surfaces of the lower mold 10b and the gantry frame 1. Further, the wife form 27 is stretched to complete the whole set. (6) The foaming agent 62 is jetted from the nozzle 61 into the gap 56 formed between the gable form 27 and the tunnel inner wall surface 55 to fill this gap (when there is no gap, the foaming agent 62 may not be used. is there). (7) When the foaming agent 2 is solidified, the concrete is densely filled with the concrete extrusion nozzles 30 arranged in the NTL frame 10 at predetermined angles and intervals. After hardening, the mold supporting jacks 28 and 36 are contracted to remove the mold. (8) After the demolding work, the cylinders 25, 2 of the NTL mold 10
5 and 26, 26 to activate the lower formwork 10b, 10b
And 10c and 10c are floated and the NTL form 10 is retracted to the rear of the gantry frame 1. (9) The auxiliary arm 21 is stored in the main girders 20 and 20, and the boom cutter 2 and the like are moved to the front of the gantry frame 1 again to restart the excavation work of the rock mass. As described above, the tunnel excavation and lining method and device excavate and lining the tunnel by repeating the operations (1) to (8), but if the gantry frame 1 passes through the tunnel, The primary lining will be completed. Particularly, in the tunnel excavation method, the NTL formwork 10
Is a tilted NT so that the upper part is in front of the lower part
Since it is an L-shaped frame, it is possible to excavate the face itself in an oblique direction, and there is no need for a "remaining nucleus" to prevent the front face of the face from collapsing, and an auxiliary construction method such as a lock bolt is also unnecessary.

In the above apparatus, the gantry frame
The upper surfaces of the main girders 20 on both upper sides of the frame 1 and the auxiliary frame.
The rails 22 and 23 were installed in the mu 21.
A groove (not shown) may be provided instead of the groove, and a rubber tire or a metal wheel may be attached to the lateral beam 10d of the NTL frame 10 to move the NTL frame 10 back and forth. Furthermore, the NTL frame 10 may be configured to be movable to the tip of the gantry frame 1 without using the auxiliary frame 21.

A gantry frame having the above structure
A waterproof film spraying device (waterproof sheet construction machine) and a centle (not shown) for the secondary lining are arranged behind the chamber 1 so that the secondary lining after the primary lining is performed. . Also, the bottom plate (invert) of the tunnel is excavated by a power shovel or the like and a concrete is placed.

[0025]

According to the excavating and lining device for a tunnel and the concrete lining method for the tunnel inner surface of the present invention having the above-described construction, various excavating machines, loading and unloading of earth and sand, rocks, etc. It is not necessary to repeat loading and unloading of the machine and the concrete placing device, and the work efficiency of tunnel excavation and lining can be greatly improved. Especially NTL
The formwork is a semi-circular inclined NTL formwork in which the upper part is inclined to the front with respect to the lower part, so that the cutting face itself can be excavated with inclination, and therefore the cutting face is also stable. Therefore, as in the past, an auxiliary construction method for preventing face collapse, that is,
There is no need to drive rock bolts and support work, the time from tunnel excavation to concrete installation is greatly reduced, and primary lining can be performed before the ground of the excavated ground becomes rough. it can. Since the primary lining is strong and highly reliable, the secondary lining can be performed under favorable conditions, and highly reliable tunnel excavation and lining work can be realized.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a tunnel excavation lining device of the present invention.

FIG. 2 is a schematic side view of a tunnel excavation lining device of the present invention.

FIG. 3 is a plan view of a front half portion of the tunnel excavation and lining device of the present invention.

FIG. 4 is a side view of the front half of the tunnel excavation lining device of the present invention.

5 is a front view as seen from the direction of arrow A in FIG. 3, showing the state in which the NTL frame has been moved to the front end of the gantry frame.

FIG. 6 is a side view of a frame portion for integrally fixing to an NTL form.

7 (A) is a partial plan view of a frame portion of an NTL formwork, and FIG. 7 (B) is a side view.

FIG. 8 is a plan view of the NTL frame moving on the gantry frame.

FIG. 9 is a side view when the NTL form moves on the gantry frame.

10 (A) is a partial plan view of a tip portion on the gantry frame, and FIG. 10 (B) is a sectional view taken along the line XX of FIG. 10 (A).

FIG. 11 (A) is a partial cross-sectional view when the tunnel inner wall excavated by the NTL formwork is subjected to the primary lining, FIG.
(B) is a partial cross-sectional view of filling a gap in a portion of the inner wall of the tunnel where the ground is concave with a foaming agent using a gable form and nozzle, and FIG. 11 (C) does not use a gable form FIG. 6 is a partial cross-sectional view of a case where a gap between the ground on the inner wall of the tunnel and the NTL form is filled with a foaming agent.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Gantry frame 2 Hydraulic breaker 3 Slipper loader 6 Spraying robot 7 Mangege 10 NTL formwork 10a Upper frame 10b Lower frame 10c Telescopic formwork 20 Main girder 21 Auxiliary arm 21a Connecting member 27 gable formwork 22, 23 rail 28 formwork support jack 25, 26 cylinder 30 concrete nozzle 29 adjusting device 32 wheel 31 traveling saddle 36 formwork support jack 33 traveling drive unit 41 upper frame 37 lateral feed device 43 Saddle connection frame 42 Connection frame 50 Pedestal 46, 47 Support 52 Case 51 Cylinder 55 Tunnel inner wall surface 53 Rod 62 Foaming agent 61 Nozzle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Osamu Saiji 1-10-6 Kano Taipei, Ikoma City, Nara Prefecture (72) Inventor Koji Inoue 370-59 Kitatsuda Town, Omihachiman City, Shiga Prefecture (72) Masami Enda, Inventor 22-42 Oshiyama Yoshii, Yawata 195-0012 Kyoto Prefecture

Claims (9)

[Claims] 1. A multi-part mold comprising a gable form contacting a transverse joining surface of a concrete cast in a cylindrical shape and a surface form contacting an inner surface of the concrete, and a plurality of partial molds formed by universal joints. An excavation lining apparatus for a tunnel, comprising a formwork device for concrete lining of a tunnel inner surface having a column member connected to a frame and having an expansion / contraction mechanism for vertically supporting the formwork (10). . 2. A formwork device for concrete lining on the inner surface of a tunnel comprises a gable formwork which contacts a transverse joining surface of a concrete installed in a tubular shape and a surface which contacts an inner surface of the concrete. A plurality of partial molds (10a, 10b) are connected to each other by a universal joint, and the partial mold (10
2. The tunnel according to claim 1, further comprising an auxiliary formwork (10c) which is expandable and contractable in the in-plane direction of the formwork by being overlapped with the partial formwork (10b) at the lower end of b). Excavation lining equipment. 3. A formwork apparatus for concrete lining on the inner surface of a tunnel, wherein a gable formwork contacting a transverse jointing surface of a concrete installed in a tubular shape and a surface contacting an inner surface of the concrete. A plurality of partial molds are connected by a flexible joint part, and an expansion / contraction mechanism (36) for vertically supporting the mold (10) is movably mounted on the gantry frame (1). Claim 1 or 2 characterized by the fact that
An excavation lining device for a tunnel according to the item. 4. A formwork device for concrete lining on the inner surface of a tunnel, wherein a gable formwork (27) is provided with a nozzle for ejecting a foamable substance. Is an excavation lining device for a tunnel according to item 3. 5. A formwork device for concrete lining on the inner surface of a tunnel, wherein an auxiliary arm is extendably and contractably disposed at a tip portion of a gantry frame, and the auxiliary arm is extended to extend the auxiliary arm. The tunnel excavation lining apparatus according to claim 3, wherein the excavation lining apparatus is capable of moving to the tip of the arm. 6. The formwork device for concrete lining on the inner surface of the tunnel is characterized in that the upper part of the formwork is inclined to the front part with respect to the lower part of the formwork. The tunnel excavation lining device according to any one of items 3 and 4 to 5. 7. The form lining device for concrete lining on the inner surface of the tunnel is provided with a concrete extruding nozzle in the circumferential direction. Three
The excavation lining device for a tunnel according to any one of items 4, 4, 5, and 6. 8. A first claim, a second claim, a third claim, and a fourth claim.
A method for lining concrete on the inner surface of a tunnel, which is performed using the formwork device for concrete lining on the inner surface of the tunnel according to any one of items 5, 5 and 6 to 7. 9. A lining concrete for lining the inner surface of a tunnel after forming a part of the gable form by spraying and hardening a foaming substance in the gap between the gable form (27) and the ground surface of the tunnel excavation. A concrete lining method for the inner surface of the tunnel, which comprises placing