JPH04194297A - Movable support frame for tunnel lining segment - Google Patents

Abstract

PURPOSE:To increase the efficiency of an assembly work by intercoupling expandable support frames, where two sets of the opposite end parts of an arcuate frame material arranged in the shape of a circle are pivotally mounted and a jack is located between two sets of other opposite end parts, through a jack for moving a support frame. CONSTITUTION:A number of segments 8 arranged in an annular state are supported in a stable state by a support frame 4, expanded by means of jacks 3, until mortar 9 at a coupling part is cured and strength attains a given value. After the mortar 9 is cured and strength attains a given value, the support frame 4 is moved forward through expansion of jacks 5 for moving a support frame in a state that the support frame 4 at a front part is contracted. The support frame 4 is expanded and forced into pressure contact with a segment ring, and the support frame 4 in the rear is contracted, and through contraction of the jack 5 for moving the support frame, the support frame 4 is moved forward. Subsequently, the support frame 4 in the rear is expanded and forced into pressure contact with the segment for support.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a movable shoring frame that supports segments constituting a tunnel lining.

[Conventional technology]

Conventionally, the joint structure of segments used for tunnel lining is a frame-shaped steel shell 6 with an H-shaped cross section, as shown in Fig. 15.
A steel shell concrete segment 8 is constructed by filling the inside with concrete 7, and each flange of the steel shell 6 in the segment 8 is joined to each flange of the steel shell 6 in another segment 8, and the joined steel shell 6 is formed. A joint structure in which mortar 9 is filled in the space between the two and hardened is known.

[Problem to be solved by the invention]

In the case of the conventional joint structure, it is necessary to support each segment 8 arranged in a ring shape until the mortar 9 filled between the steel shells 6 hardens and reaches the required strength.

It is conceivable to support each segment arranged in a ring shape with an assembly-and-disassembly framework, but in this case, it would be complicated to repeatedly assemble, disassemble, and move the framework, and the framework would be There is a problem that the relocation and assembly work efficiency is poor.

The object of the present invention is to provide a movable support frame for tunnel lining segments that can advantageously solve the above-mentioned problems.

[Means to solve the problem]

In order to achieve the above object, in the movable support frame for tunnel lining segments of the first invention, four arcuate frame members 1
are arranged so as to form a substantially circular shape, and each arc-shaped frame member 1
Of the opposing ends, two sets of opposing ends located on the diameter of the circular shape are pivoted by a pivot shaft 2 extending in the tunnel axis direction, and a jack 3 is provided between the remaining two sets of opposing ends.
are interposed to form a support frame 4 that can be expanded and contracted in diameter, and a plurality of support frames 4 are arranged at intervals in the tunnel axis direction.
are connected via a number of layers of supporting frame moving jacks 5 arranged at intervals in the circumferential direction of the supporting frame.

In addition, in the movable support frame for tunnel lining segments of the second invention, □゛The four arc-shaped frame members 1 are arranged to form a substantially circular shape, and among the opposing ends of each arc-shaped frame member 1,
Two sets of opposing ends located on the diameter of the circular shape are pivotally connected by a pivot shaft 2 extending in the tunnel axis direction, and a jack 3 is interposed between the remaining two sets of opposing ends to expand and contract the diameter. A support frame 4 having a freely adjustable diameter is constructed, and a plurality of support frames 4 arranged at intervals in the tunnel axis direction are moved via a plurality of support frame movement jacks 5 arranged at intervals in the circumferential direction of the support frame. A plurality of segment support arms 34 are connected to each support frame 4 and project in the tunnel axis direction, and are attached at intervals in the circumferential direction of the support frame, and are attached to adjacent support frames 4 in the tunnel axis direction. The segment supporting arms 34 are arranged offset in the circumferential direction of the support frame so as not to overlap in the tunnel axial direction.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

Figures 1 to 8 show an embodiment of the first invention, in which four steel arc-shaped frame members 1 each having a length close to the length obtained by dividing a circle into four equal parts form a substantially circular shape. Each arc-shaped frame member 1 includes an arc-shaped face plate 10, a plurality of arc-shaped frame plates 11 fixed to the inside of the arc-shaped face plate 10 by welding, and the arc-shaped frame plates 11 and A large number of reinforcing ribs 12 and a seat plate 13 are fixed to the arcuate face plate 10 by welding.
each arc-shaped frame member 1 is arranged so that one end thereof is located on the vertical diameter line of the circle, and -
The other end of each arcuate frame material 1 is arranged near the horizontal diameter line of the circle, and one end of the arcuate frame material l adjacent in the left and right direction is a pivot shaft 2 extending in the tunnel axis direction. A trapezoidal protrusion 14 projecting downward is integrally provided on the arcuate face plate 10 at the other end of one of the vertically adjacent arcuate frame members 1, and On the arcuate face plate 10 at the other end of the arcuate frame member 1,
A trapezoidal recess 15 into which the trapezoidal protrusion 14 is inserted is provided, and the base end of the hydraulic jack 3 is fixed to the seat plate 13 at the end of one of the vertically adjacent arcuate frame members 1. 3 is disposed so as to face the seat plate 13 at the end of the other vertically adjacent arcuate frame material 1, and is pivotally connected by a pivot 2, with a jack 3 interposed between the ends. A circular support frame 4 whose diameter can be freely expanded and contracted is formed by the arc-shaped frame material 1 of the book.

Horizontal connecting rods 16 extending in the left-right direction are arranged at the upper and lower parts of the support frame 4, and are fixed to the arcuate frame material 1 through horizontal long holes 17 provided at both ends of the connecting rods 16. A connecting bolt 19 is inserted across the bracket 18, and a rubber plate 20 is fixed to the outer surface of the arcuate face plate 1o of each arcuate frame member 1 with an adhesive.

A plurality of (three in the illustrated case) supporting frames 4 configured as described above are arranged at intervals in the tunnel axis direction, and adjacent supporting frames 4 in the tunnel axis direction are arranged at intervals in the circumferential direction of the supporting frames. They are connected via a plurality of (four in the illustrated case) hydraulic support frame movement jacks 5 arranged at intervals.

9 and 10 show the usage state of the movable support frame according to the embodiment, in which a partition wall 22 is provided in the front part of the cylindrical body 21 of a shield excavator, and the cylindrical body 21 is provided with a cutter 26 that is rotated by a cutter drive device 23 via a drive gear 24 and an annular driven gear 25. An inclined earth discharge pipe 27 is connected, and a drive device 28 is installed inside the earth earth discharge pipe 27.
An earth discharge screw 29 rotated by the soil removal pipe 27 is housed in the discharge port provided at the rear lower part of the earth discharge pipe 27.
An earth removal hopper 31 having an M (not shown) that is opened and closed by an opening/closing cylinder 3o is connected.

A large number of propulsion jacks 3 are arranged around the cylindrical body 21.
2 is attached, and a segment 8 consisting of a steel shell 6 and a concrete layer cast therein is attached to the cylindrical body 21.
The segment ring is conveyed in the circumferential direction at the rear part of the cylindrical body by the erector 33 provided inside, and the segment ring is assembled. The segment ring and the joint space of the segment 8 in the segment ring adjacent to the rear thereof are filled with mortar 9, and each shoring frame 4 in the movable shoring frame arranged inside the tunnel lining is used to The joints of segment rings adjacent in the front-rear direction are supported from inside the tunnel lining.

After the mortar 9 at the joint of the segment ring supported by the support frame 4 hardens and reaches the required strength, the jack 3 attached to the front support frame 4A is shortened, causing the support frame 4A to contract. The diameter is deformed, and then the front support frame 4A
The front shoring frame moving jack 5A connecting the front shoring frame 4B and the middle shoring frame 4B is extended, and the front shoring frame 4A is moved forward by a distance corresponding to the longitudinal width of the segment 80. The jack 3 attached to the supporting frame 4A of the segment is extended, and the supporting frame 4A is pressed against the joint portion of the adjacent segment ring.

The shoring frame 4B is shortened and the diameter of the shoring frame 4B is reduced, and then the rear shoring frame moving jack 5B connecting the middle shoring frame 4B and the rear shoring frame 4c is extended, and the front shoring frame 4B is expanded. After the frame moving jack 5A is shortened and the intermediate supporting frame 4B is moved forward by a distance corresponding to the longitudinal width of the segment 8, the jack 3 attached to the intermediate supporting frame 4B is extended and the supporting frame 4B is moved forward by a distance corresponding to the longitudinal width of the segment 8. The frame 4B is pressed against the joint portions of adjacent segment rings.

Next, the jack 3 attached to the rear shoring frame 4c is shortened to reduce the diameter of the shoring frame 4c, and then the rear shoring frame moving jack 5B is shortened to reduce the diameter of the shoring frame 4c.
is moved forward by a distance corresponding to the longitudinal width of the segment 8, and then the jack 3 attached to the rear support frame 4C
is extended, and its supporting frame 4C is pressed against the joint portion of the adjacent segment ring.

Thereafter, similar operations are repeated in sequence, and each of the supporting frames 4A, 4B, and 4C in the movable supporting frame is sequentially moved forward.

FIGS. 11 to 13 show an embodiment of the second invention, in which the length of the circle is close to the length obtained by dividing the circle into four equal parts.
The steel arc-shaped frame members 1 of the book are arranged to form a substantially circular shape, one end of each arc-shaped frame member 1 is located near the vertical diameter line of the circle, and each circle The other end of the arc-shaped frame material 1 is arranged near the horizontal diameter line of the circle, and one end of the arc-shaped frame material l adjacent in the left-right direction is pivoted by a pivot 2 extending in the tunnel axis direction. A trapezoidal protrusion 14 projecting downward is integrally provided at the other end of one of the arcuate frame members 1 adjacent to each other in the vertical direction. The trapezoidal recess 15 into which the trapezoidal protrusion 14 is inserted is obstructed at the other end of the arcuate frame member 1 adjacent in the vertical direction.
Both ends of the hydraulic jack 3 are connected via a support shaft 35 extending in the direction of the tunnel axis, and are expanded by four arcuate frame members 1 which are pivoted by the pivot 2 and connected via the jacks 3. A circular support frame 4 is configured, the diameter of which can be freely reduced.

A hydraulic jack 36 for rotation extending in the left-right direction is arranged at the upper part of the support frame 4, and the hydraulic jack 36
Both end portions of are connected to brats fixed to the arcuate frame members 1 adjacent to each other in the left-right direction of the upper part via a support shaft 37 extending in the tunnel axis direction.

A plurality of (four in the illustrated case) supporting frames 4A, 4B, 4C, and 4D configured as described above are arranged at intervals in the tunnel axis direction, and adjacent supporting frames 4 in the tunnel axis direction
A to 4D are connected via a plurality of (four in the illustrated case) hydraulic supporting frame movement jacks 5 arranged at intervals in the circumferential direction of the supporting frame.

A plurality of recesses 38 are provided on the outer peripheral sides of the second and third supporting frames 4B to 4D at intervals in the circumferential direction of the supporting frames, and the intermediate portions of the segment supporting arms 34 extending in the tunnel axis direction are The arm 34 is disposed within the recess 38, and the intermediate portion of the arm 34 is pivotally connected to the arcuate frame member 1 by a pivot 39.
A plurality of segment support arms 34 protruding rearward in the tunnel axis direction from the first (frontmost) supporting frame 4A are arranged and fixed at intervals in the circumferential direction of the supporting frame. The segment support arms 34 attached to supporting frames 4A to 4D adjacent in the tunnel axial direction are arranged offset in the circumferential direction of the supporting frames so as not to overlap in the tunnel axial direction.

Further, on the outer peripheral surface of each of the support frames 4A to 4D and the outer surface (segment side surface) of the segment support arm 34, a rubber plate or a rubber plate (not shown) having a sliding layer made of synthetic resin such as tetrafluoroethylene on the surface is provided. (omitted) is fixed with adhesive or the like.

FIG. 14 shows the usage state of the movable shoring frame according to the embodiment of the second invention, in which the tunnel lining segment 8 is supported by each of the shoring frames 4A to 4D and the segment supporting arms 34 attached to these. However, other configurations and operations are the same as in the case where the movable support frame is used as shown in FIG.

When carrying out the first invention, a sliding layer made of synthetic resin such as tetrafluoroethylene may be integrally provided on the outer surface of the rubber plate 20, and the tip of the jack 3 may be attached to the end of the arc-shaped frame member 1. On the other hand, it may be pivoted by a pivot shaft extending in the tunnel axis direction.

Furthermore, an annular guide rail arranged concentrically with the supporting frame 4 may be fixed, and a welding device for joining the joints of the segments by welding may be moved along the annular guide rail.

〔Effect of the invention〕

Since the second invention is configured as described above, it produces the effects described below.

The supporting frame 4 whose diameter has been expanded by the jacks 3 can support a large number of segments 8 arranged in a ring shape in a stable state until the mortar 9 at the joint hardens and reaches the required strength. After the mortar 9 hardens and reaches the required strength, the front shoring frame 4 is moved forward by extending the shoring frame moving jack 5 while the diameter of the front shoring frame 4 is reduced. Then, the front shoring frame 4 is expanded in diameter and brought into pressure contact with the segment ring, and the rear shoring frame 4 is reduced in diameter by shortening the shoring frame moving jack 5. By moving the support frame 4 forward and then expanding the diameter of the rear support frame 4 and bringing it into pressure contact with the segment ring, the movable support frame for the tunnel lining segment can be easily and quickly moved forward to support the segment ring. I can do it.

In the case of the second invention, the tunnel lining segment 8 is
Since it is supported by a plurality of supporting frames 4 arranged at intervals in the tunnel axial direction and a plurality of segment supporting arms 34 protruding from each supporting frame 4 in the tunnel axial direction, the tunnel lining segment 8 can be extended over a wide range. Even when the tunnel lining segments 8 between adjacent supporting frames 4 are supported in a stable state and the distance between adjacent supporting frames 4 is increased, the tunnel lining segments 8 between the supporting frames 4 are supported by the segment supporting arms 34. The tunnel lining segment 8 can be supported in a stable state.

[Brief explanation of the drawing]

1 to 8 show an embodiment of the first invention, in which FIG. 1 is a longitudinal sectional front view of a movable support frame for a tunnel lining segment, FIG. 2 is a front view thereof, and FIG. 4 is a longitudinal sectional side view of the movable shoring frame, FIG. 4 is a vertical sectional front view of the upper part of the shoring frame, FIG. 5 is a view of that part from below, and FIG. 6 is a view of the vicinity of the jack installation part on the side of the shoring frame. FIG. 7 is a longitudinal sectional front view thereof, and FIG. 8 is a side view of the insertion joint on the side of the supporting frame seen from the outside. FIG. 9 is a vertical cross-sectional side view showing the state of use of the movable support frame for tunnel lining segments according to the embodiment of the first invention, and FIG. 10 is an enlarged view of the relationship between the support frame and segment joints in FIG. FIG. 11 to 13 show an embodiment of the second invention, in which FIG. 11 is a longitudinal sectional side view of a movable support frame for tunnel lining segments, and FIG. 12 is a line taken along line A-A in FIG. 11. The sectional view, FIG. 13, is a sectional view taken along the line B--B in FIG. 11. 1st
FIG. 4 is a longitudinal sectional side view showing the state of use of the movable support frame for tunnel lining segments according to the embodiment of the second invention. 1st
FIG. 5 is a longitudinal sectional side view showing a conventional joint structure of steel shell concrete segments. In the figure, ■ is an arc-shaped frame member, 2 is a pivot, 3 is a jack, 4 is a support frame, 5 is a jack for moving the support frame, 8 is a segment, 9 is mortar, 10 is an arc-shaped face plate, and 14 is a trapezoidal protrusion. , 15 is a trapezoidal recess, 16 is a connecting rod, 17 is a long hole, 1
9 is a connecting bolt, 20 is a rubber plate, 34 is a segment support arm, 35 is a support shaft, 36 is a hydraulic jack, 37
38 is a recessed portion, and 39 is a pivot shaft. 1/ 'l,'l 1 i

Claims (2)

[Claims] (1) The four arc-shaped frame members 1 are arranged to form a substantially circular shape, and among the opposing ends of each arc-shaped frame member 1, two sets of opposing ends located on the diameter of the circle are It is pivoted by a pivot shaft 2 extending in the tunnel axial direction, and a jack 3 is interposed between the remaining two sets of opposing ends to form a support frame 4 that can be freely expanded and contracted in diameter, and is spaced apart in the tunnel axial direction. A plurality of shoring frames 4 arranged at intervals are movable shoring frames for tunnel lining segments connected via a plurality of shoring frame moving jacks 5 arranged at intervals in the circumferential direction of the shoring frames. (2) The four arc-shaped frame members 1 are arranged to form a substantially circular shape, and among the opposing ends of each arc-shaped frame member 1, two sets of opposing ends located on the diameter of the circle are It is pivoted by a pivot shaft 2 extending in the tunnel axial direction, and a jack 3 is interposed between the remaining two sets of opposing ends to form a support frame 4 that can be freely expanded and contracted in diameter, and is spaced apart in the tunnel axial direction. A plurality of shoring frames 4 arranged at intervals are connected via a plurality of shoring frame moving jacks 5 arranged at intervals in the circumferential direction of the shoring frames. A plurality of protruding segment supporting arms 34 are attached at intervals in the circumferential direction of the supporting frame, and the segment supporting arms 34 attached to supporting frames 4 adjacent to each other in the tunnel axial direction do not overlap in the tunnel axial direction. A movable shoring frame for tunnel lining segments that is placed offset in the direction around the shoring frame.