JP3543288B2 - Slide center device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide centrifugal device whose cross-sectional diameter can be adjusted.
[0002]
[Prior art]
A tunnel boring machine (hereinafter, referred to as “TBM”) that excavates at a constant cross-sectional diameter regardless of the ground conditions is known.
In general, the thickness of the primary support (sprayed concrete) or the secondary lining (rolled concrete) is determined by the conditions of the ground, and the high quality ground section is thin and the defective ground section is thick.
[0003]
[Problems to be solved by the invention]
When constructing a tunnel skeleton using TBM, determine the excavation cross-sectional diameter of the TBM based on the defective ground section, and if the hollow section inside the lining is the same, the tunnel lining thickness in the high quality ground section However, there is a problem that the thickness is thicker than the bad ground section, the design strength becomes excessive, and the economic burden increases.
Conversely, if the excavation cross-sectional diameter of the TBM is determined based on the high quality mountainous section, the lining thickness of the tunnel frame is reduced in the bad mountainous area, causing a problem of insufficient strength.
[0004]
The present invention has been made in view of the above points, and it is an object of the present invention to provide a slide centre device capable of arbitrarily adjusting a lining thickness of a tunnel body regardless of a mountainous condition and performing construction. It is in.
[0005]
[Means for Solving the Problems]
The present invention relates to an apparatus for lining a tunnel body, in which a traveling carriage equipped with a beam and a plurality of divided formwork are connected by pins and attached to the beam via a plurality of extendable jacks. In the slide centrifugal apparatus comprising the divided molds , the edge portions of the skin plates of the adjacent divided molds are overlapped, and the divided molds are allowed to slide in the circumferential direction of the tunnel and connected to each other. A slide centrifugal device, characterized in that a curvature adjusting jack is connected between each of the divided mold frames, and a radius of curvature of the mold is adjustable in accordance with expansion and contraction of the curvature adjusting jack. Further, in the above slide centrifugal device , the split mold is configured by providing a reinforcing frame inside a strip-shaped skin plate, and a hinge bracket is provided on a surface of the reinforcing frame of each adjacent split mold, and the hinge bracket is provided. A hole that allows sliding in the circumferential direction of the tunnel is opened, and a pin is inserted into the hole to adjust the radius of curvature of the mold along with expansion and contraction of the curvature adjusting jack, It is a slide center device. Further, in the above slide centrifugal device , the lower part of the mold is open , or the divided molds are connected in a cylindrical shape so that the mold covers the entire periphery of the tunnel. This is a slide center device.
[0006]
Embodiment 1 of the present invention
An embodiment of the present invention will be described below with reference to FIGS.
<A> Outline of Slide Centr Device As shown in FIG. 1, the basic components of the slide centr device 10 will be described. The slide centr device 10 is mounted on a self-propelled traveling vehicle 20 and a traveling vehicle 20 and has a curvature. It comprises a mold 30 whose radius can be variably adjusted.
The right side of the drawing is a tunnel face side, and a primary lining 40 is applied by spraying or the like, and the left side of the drawing is a 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 cart 20 of the slide centrifugal device 10 is installed so as to straddle the primary lining 40 and the secondary lining 41. Hereinafter, each part of the apparatus will be described.
[0007]
<B> Traveling Truck The traveling truck 10 is composed of a beam 21 arranged along the tunnel direction, and portal-shaped support legs 22 and 23 provided at the front and rear of the beam 21, respectively. The vertical member of each of the support legs 22 and 23 is formed of a telescopic hydraulic cylinder or the like, and the entire beam 21 is raised and lowered by the expansion and contraction operation of the support legs 22 and 23. Each of the support legs 22 and 23 has a traveling wheel 24, and is driven by a self-propelled device 25 provided on one of the support legs 22 and self-propelled while clamping a rail 43.
As shown in FIGS. 1 and 2, an upward journal jack 26 and a lateral journal jack 27 are provided at the front and rear portions of the beam 21, respectively. These journal jacks 26 and 27 are extended to By directly contacting the contact members 28 provided at the ends of the jacks 26 and 27 with the ceiling surface and the side surface of each of the linings 40 and 41, the movement of the traveling carriage 20 can be restricted and positioned.
As shown in FIGS. 1 and 3, a plurality of telescopic jacks 29 are provided 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.
The traveling vehicle 20 is provided with various equipment necessary for construction such as a work scaffold (not shown), a chain block, a conveyer for excavating soil, and the like.
[0008]
<C> Formwork Formwork 30 is composed of a plurality of divided formworks 31 arranged in the tunnel direction, that is, parallel to beam 21, and adjacent divided formworks 31 are connected by pins.
As shown in FIG. 4, each split mold frame 31 is composed of a band-shaped skin plate 32 and a reinforcing frame 33 provided inside the skin plate 32, and is provided on a facing surface of each reinforcing frame 33 for connection. The brackets 34 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, and each divided mold frame 31 allows sliding in the circumferential direction. Jacks 38 are connected in the circumferential direction between the connection brackets 37 of the adjacent reinforcing frames 33, and all the curvature adjustment jacks 38 are simultaneously expanded and contracted. By doing so, the radius of curvature of the mold 30 can be adjusted by changing the distance between the adjacent divided molds 31, 31. The curvature adjusting jack 38 includes well-known expansion / contraction means such as a fluid jack or a screw-type turnbuckle.
Further, it is expected that a gap will be formed between the divided molds 31, 31 due to the extension operation of the curvature adjusting jack 38, but this can be dealt with by overlapping the edges of the skin plates 32 as shown in FIG. Just fine. As another countermeasure, if the number of divisions of the molds 30 is increased and the amount of change between the divided molds 31 is reduced, even if the edges of the skin plates 32 are abutted, the generated gap can be ignored. Can be set smaller.
The end of the expansion / contraction jack 29 extending from the beam 21 is connected to the reinforcing frame 33 of a part of the divided formwork 31.
Further, it is the same as the conventional mold that some of the divided molds 31 are provided with a driving hole also serving as an inspection window for confirming the filling of the concrete.
[0009]
[Action]
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 centre 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, the end plate is attached before and after the formwork 30 and concrete is filled from the inside of the formwork 30. Thus, the secondary lining 41 shown in FIG. 1 is constructed.
When the curing of the secondary lining 41 is completed, the telescopic jack 29 shown in FIG. 4 is contracted, the mold 30 is folded inward, and the mold is released.
By repeating the above steps, the secondary lining 41 is extended in the tunnel direction.
[0010]
<B> Adjustment of form radius of curvature As described above, the thickness of the secondary lining is determined according to the conditions of the ground, and it is necessary to lay the high-quality ground section thin and the bad ground section thick. However, when the tunnel cross section diameter is constant, it has been difficult for the conventional devices to adjust the thickness of the secondary lining.
In the present invention, 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 facing 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]
Embodiment 2 of the present invention
In the first embodiment described above, the case where the lower portion of the mold 30 is open has been described, but the mold 30 may be connected in a tubular shape capable of lining 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】
<A> 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 form, the form 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 vertical sectional view of a center of a tunnel in which a slide centr device according to the present invention is arranged. FIG. 2 is a sectional view of II in FIG. 1. FIG. 3 is a sectional view of III-III in FIG. Perspective view of a mold with parts omitted [Explanation of reference numerals]
Reference numeral 10: Slide centrifugal device 20: Traveling trolley 21 ... Beam 22, 23 ... Support leg 24 ... Traveling wheels 26, 27 ... Journal jack 29 ... Telescopic jack 30 ... Mold 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 (4)

A device for lining a tunnel body, comprising a traveling vehicle equipped with a beam, a divided formwork divided into a plurality of divided formwork connected by pins, and a formwork attached to the beam via a plurality of telescopic jacks. In a slide center device comprising:
Polymerize the edge of the skin plate of each adjacent divided formwork,
Along with connecting between the divided molds to allow sliding in the tunnel circumferential direction, connecting a curvature adjusting jack between the adjacent divided forms,
Characterized in that the curvature radius of the formwork can be adjusted with expansion and contraction of the curvature adjustment jack,
Slide center device. The slide center device according to claim 1,
The split formwork is configured by providing a reinforcing frame inside the strip-shaped skin plate, and a hinge bracket is provided on the opposing surface of the reinforcing frame of each adjacent split formwork,
Open a hole in the hinge bracket to allow sliding in the tunnel circumferential direction,
A pin is inserted into the hole to adjust the radius of curvature of the formwork with expansion and contraction of the curvature adjusting jack,
Slide center device. 3. The slide-centre device according to claim 1 , wherein a lower portion of the mold is open. 3. The slide-centre device 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.

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