JPH10115195A - Slide center apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute an appropriately thick lining construction in accordance with conditions on the ground, and carry out the execution of a lining construction with high accuracy by having a radius of curvature of the mold frame controllable by curvature adjusting jacks. SOLUTION: A slide center apparatus 10 is fastened by making journal jacks 26, 26, 28, 28 extend in the inner circumferential face of a first lining construction 40. Then, by allowing extendible jacks 29, 29 to extend, a mold frame 30 is disposed at the inside of the first lining construction 40. At this time, in accordance with conditions of the natural ground, a radius of curvature of the mold frame 30 is adjusted by operating curvature adjusting jacks 38. Following this, end plates are attached to the front and rear side of the mold frame 30, and then by filling concrete therein, a second lining construction 41 is formed, subsequently the mold frame 30 is removed therefrom after curing. By repeating this operation, the second lining construction 41 is extended in the tunnel direction. So, the thickness of the lining construction is adjusted arbitrarily, and execution can be done with high accuracy in such lining construction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide centrifugal apparatus whose cross-sectional diameter can be adjusted.

[0002]

2. Description of the Related Art A tunnel boring machine (hereinafter, referred to as "TBM") for excavating at a constant cross-sectional diameter irrespective of the ground conditions is known. In general, the thickness of the primary support (sprayed concrete) or the secondary lining (rolled concrete) is determined according to the condition of the ground, and the high-quality ground section is thin and the defective ground section is thickly lining.

[0003]

In the case of constructing a tunnel frame using a TBM, the TBM is constructed on the basis of a bad mountain section.
Determining the excavation cross section diameter, if the hollow section inside the lining is the same, the lining thickness of the tunnel frame will be thicker in the good quality ground section than in the bad ground section, resulting in excessive design strength or economic burden. There is a problem that increases. On the other hand, T
When the BM excavation cross-sectional diameter is determined, the lining thickness of the tunnel frame becomes thinner in the inferior mountain section, causing a problem of insufficient strength.

The present invention has been made in view of the above points, and an object of the present invention is to provide a slide centrifugal apparatus capable of arbitrarily adjusting a lining thickness of a tunnel body irrespective of a mountainous condition. Is to provide.

[0005]

The invention according to claim 1 is
An apparatus for lining a tunnel body, a traveling bogie including a beam, a plurality of divided formwork connected by pins, and a formwork attached to the beam via a plurality of telescopic jacks. In the slide centr apparatus, the divided molds are connected to each other while allowing sliding in the circumferential direction of the tunnel, and a curvature adjusting jack is connected between the adjacent divided molds. Characterized in that the radius of curvature of the formwork can be adjusted in accordance with expansion and contraction of the slide. According to a second aspect of the present invention, in the first aspect, the split mold is provided with a reinforcing frame provided inside a strip-shaped skin plate, and a hinge bracket is provided on an opposing surface of the reinforcing frame of each adjacent split mold. The hinge bracket is provided with a hole that allows sliding in the circumferential direction of the tunnel, and a pin is inserted into the hole to form a radius of curvature of the mold as the curvature adjusting jack expands and contracts the adjacent divided molds. Characterized in that it is configured to be adjustable,
It is a slide center device. According to a third aspect of the present invention, there is provided the slide center device according to the second aspect, wherein the edge portions of the skin plates of the adjacent divided formwork are overlapped. The invention according to a fourth aspect is the slide center device according to any one of the first to third aspects, wherein a lower portion of the mold is open. The invention according to claim 5 is the invention according to claim 1.
4. The slide-centre device according to claim 3, wherein the divided molds are connected in a cylindrical shape so that the molds cover the entire periphery of the tunnel.

[0006]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. <A> Outline of Slide Centr Device The basic components of the slide centr device 10 will be described with reference to FIG.
Reference numeral 0 denotes a self-propelled traveling vehicle 20 and a formwork 30 mounted on the traveling vehicle 20 and capable of variably adjusting a radius of curvature. The right side of the drawing is the tunnel face side, and the primary lining 40 is applied by spraying or the like, and the left side of the drawing is the secondary lining 41 constructed inside the primary lining 40 using the slide centrifugal device 10 according to the present invention. . The floor concrete 42 of the tunnel body is constructed together with the primary lining 40, and a plurality of rails 43 are laid on the upper surface thereof. The traveling trolley 20 of the slide centrifugal device 10 has these primary linings 4
0 and the secondary lining 41. Hereinafter, each part of the apparatus will be described.

<B> Traveling vehicle The traveling vehicle 10 is a beam 2 arranged along the tunnel direction.
1, and portal-shaped support legs 22 and 23 provided at the front and rear portions of the beam 21, respectively. The vertical member of each of the support legs 22 and 23 is configured by a telescopic hydraulic cylinder or the like, and the entire beam 21 moves up and down by the expansion and contraction operation of the support legs 22 and 23. Each support leg 2
2, 23 are provided with running wheels 24, and one of the support legs 2 is provided.
The self-propelled device 25 provided on the second side is driven and self-propelled while clamping the rail 43. In addition, as shown in FIGS.
6 and a horizontal journal jack 27 are provided, respectively, and these journal jacks 26, 27 are extended, and the material 28 provided at the end of each journal jack 26, 27 is covered with each lining 40, 41. By directly contacting the ceiling surface and the side surfaces of the vehicle, the movement of the traveling vehicle 20 can be restricted and positioned. As shown in FIGS. 1 and 3, a plurality of telescopic jacks 29 are disposed around the beam 21 in the radial direction, and the ends of these telescopic jacks 29 are provided on the inner peripheral surface of the formwork 30. Being connected, the beam 21 supports the formwork 30. In addition, traveling cart 20
Are equipped with various equipment necessary for construction such as a work scaffold (not shown), a chain block, a conveyer for excavating soil, and the like.

<C> Formwork The formwork 30 is composed of a plurality of divided forms 31 arranged in the tunnel direction, that is, parallel to the beam 21, and the adjacent divided forms 31 are connected by pins. Each split formwork 3
1, as shown in FIG. 4, a band-shaped skin plate 32,
The reinforcing frame 33 is provided inside the skin plate 32, and the connecting brackets 34 provided on the opposing surfaces of the reinforcing frames 33 are connected by pins 35. The present invention is characterized in that the radius of curvature of the mold 30 is variably adjusted. That is, a pin 35 is inserted into a hole 36 such as a fool hole or a long hole formed in one or the other of the overlapped hinge brackets 34.
1 are connected so as to allow sliding in the circumferential direction, and the connecting brackets 37, 3 of the adjacent reinforcing frames 33 are connected.
The curvature adjusting jacks 38 are connected to each other in the circumferential direction, and all the curvature adjusting jacks 38 are simultaneously expanded and contracted to change the distance between the adjacent divided molds 31. The radius of curvature of the mold 30 is configured to be adjustable. The curvature adjusting jack 38 includes well-known expansion / contraction means such as a fluid jack or a screw-type turnbuckle. A gap is expected to be formed between the divided molds 31 by the extension operation of the curvature adjusting jack 38. This can be dealt with by overlapping the edges of the skin plates 32 as shown in FIG. I just need. As another countermeasure, the number of divisions of the mold 30 is increased to increase the number of divided molds 31 and 3.
By reducing the amount of change between the two, even if the edges of the skin plates 32 abut each other, the generated gap can be set to be small enough to be ignored. Telescopic jack 2 extending from beam 21
The end of 9 is connected to the reinforcing frame 33 of a part of the split formwork 31. Further, it is the same as the conventional mold that some of the divided molds 31 are provided with a driving hole which also serves as an inspection window for confirming the filling of the concrete.

[0009]

Next, the operation of the slide center device will be described. <A> Basic Operation As shown in FIGS. 1 and 2, the journal jacks 26 and 27 are extended on the inner peripheral surface of the primary lining 40 to fix the slide center device 10. Next, after extending and retracting the expansion / contraction jack 29 shown in FIG. 4 and disposing the formwork 30 inside the primary lining 40, a base plate is attached before and after the formwork 30 and concrete is filled from the inside of the formwork 30. Secondary lining 4 shown in FIG.
Build 1. When curing of the secondary lining 41 is completed, FIG.
Is contracted, the mold frame 30 is folded inward, and the mold is released. By repeating the above steps, the secondary lining 41 is extended in the tunnel direction.

<B> Adjustment of the radius of curvature of the formwork As described above, the thickness of the secondary lining is determined according to the conditions of the ground, and it is necessary to thin the high-quality ground section and thicken the defective ground section. However, if the tunnel cross section diameter is constant,
Conventional devices have had difficulty adjusting the thickness of the secondary lining. In the present invention, the structure is such that the radius of curvature of the mold 30 constituting the slide centrifugal device 10 can be freely adjusted. That is, when changing the frame thickness of the secondary lining 41, when the curvature adjusting jacks 38 shown in FIG. 4 are simultaneously extended, the opposing distance of the divided molds 31 constituting the mold 30 is increased, and When the radius of curvature of the mold 30 increases, and when the curvature adjusting jacks 38 are simultaneously contracted, the radius of curvature of the formwork 30 decreases. In this way, the secondary linings 41 having different frame thicknesses are constructed while appropriately adjusting the radius of curvature of the formwork 30 according to the situation of the ground.

[0011]

Second Embodiment In the first embodiment described above, the case where the lower portion of the mold 30 is open has been described.
The formwork 30 may be connected in a cylindrical shape capable of covering the entire periphery of the tunnel. Forming the mold 30 with a plurality of divided molds 31 and connecting the divided molds 31 with the curvature adjusting jacks 38 are the same as in the first embodiment.

[0012]

【The invention's effect】

<B> Since the radius of curvature of the formwork can be adjusted, lining with an appropriate thickness can be performed according to the condition of the ground. <B> By increasing the number of divided molds forming the mold, the mold can be made closer to a perfect circle, and construction with high lining accuracy can be performed.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional view of a tunnel in which a slide centre device according to the present invention is arranged.

FIG. 2 is a sectional view taken along the line II in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a perspective view of a partly omitted formwork;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Sliding center apparatus 20 ... Truck 21 ... Beam 22,23 ... Support leg 24 ... Running wheel 26,27 ... Jack jack 29 ... Extension / retraction jack 30 ... Form frame 31 ... Split type Frame 32 Skin plate 33 Reinforcement frame 34 Hinge bracket 37 Connection bracket 38 Jack for curvature adjustment 40 Primary lining 41 Secondary lining 42 Floor concrete 43 Rail

Claims (5)

[Claims] An apparatus for lining a tunnel body, wherein a traveling carriage having a beam and a plurality of divided formwork are connected by pins, and the beam is connected to the beam via a plurality of extendable jacks. In the slide centrifugal device comprising a mounted formwork, the divided formwork is allowed to slide in the circumferential direction of the tunnel and connected, and a curvature adjusting jack is connected between the adjacent divided formwork, A slide-centre device, wherein a radius of curvature of the formwork is adjustable in accordance with expansion and contraction of the curvature adjusting jack. 2. The divided formwork according to claim 1, wherein a reinforcing frame is provided inside a strip-shaped skin plate, and a hinge bracket is provided on a surface of each of the adjacent divided formworks facing the reinforcing frame. A hole is formed in the bracket that allows sliding in the circumferential direction of the tunnel, and a pin is inserted into the hole so that each adjacent divided formwork can adjust the radius of curvature of the formwork with expansion and contraction of the curvature adjusting jack. A slide center device, characterized in that: 3. The slide-centre device according to claim 2, wherein the edge portions of the skin plates of the adjacent divided molds are overlapped. 4. The method according to claim 1, wherein a lower portion of the mold is open.
Slide center device. 5. The slide center according to claim 1, wherein the divided formwork is connected in a cylindrical shape so that the formwork covers the entire periphery of the tunnel. apparatus.