JP2007332666A - Compaction apparatus for tunnel lining concrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compaction apparatus for tunnel lining concrete, which carries out compaction of placed concrete at a plurality of locations in a circumferential direction of a lining space, by setting a minimum number of support members. <P>SOLUTION: The compaction apparatus for tunnel lining concrete carries out compaction of the tunnel lining concrete placed in the lining space S defined in a gap between a tunnel T internal wall surface and a lining form 3 arranged inside the internal wall surface. The compaction apparatus is provided with a support pipe 6 which reciprocatively supports a compaction vibrator from outside to inside of the lining space S, and moving means 44, 5A which are located at a plurality of locations different from each other, for moving the support pipe 6 to retractably move the vibrator into the lining space S. The moving means are formed of a rail member 44 extending outside the lining space S in a circumferential direction of the same, and a carriage 5A arranged on the rail member 44 in a manner movable along the same, for supporting the support pipe 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a compacting device for tunnel lining concrete, and more particularly, to a compacting device for supporting a vibrator on a support member and inserting it into the placed lining concrete to compact it.

Patent Document 1 discloses a tunnel slide centle provided with the above compaction device. Here, a plurality of guide members are provided in the tunnel longitudinal direction on the outer periphery of the concrete casting mold of the slide centle, and a rod-like support member having a vibrator at the tip is moved in the axial direction of these guide members. I support it as possible. Then, concrete is placed in the lining space formed between the outer periphery of the above formwork and the inner wall surface of the tunnel, and the concrete is vibrated as the placed concrete fills the lining space. The support member, which has been given and tightened while entering the innermost part of the lining space, is intermittently pulled out of the lining space by a gripping mechanism and a feeding mechanism provided on the outer side of the formwork. I have to.
JP-A-2005-213867

  By the way, compaction of the cast concrete needs to be performed by inserting a vibrator into the lining space at a plurality of positions in the circumferential direction of the inner wall of the tunnel. Therefore, in the conventional compaction device, a support member having a vibrator is provided. There was a problem that the number of installations increased and the cost was increased because they had to be installed at necessary locations in the circumferential direction of the inner wall.

  Accordingly, the present invention solves such problems, and tunnel lining concrete that can compact cast concrete at a plurality of positions in the circumferential direction of the lining space with a minimum number of support members installed. An object of the present invention is to provide a compaction device.

  In order to achieve the above object, in the present invention, in the lining space (S) formed between the inner wall surface of the tunnel (T) and the lining formwork (3) disposed inside thereof. A tunnel lining concrete compaction device for compacting lining concrete to be placed, and supports a vibrator for compaction so as to be able to advance and retreat from the outside of the lining space (S) into the lining space (S). A support member (6) and moving means (44, 5A, 5B) for moving the support member (6) so that the vibrator can be advanced and retracted into the lining space (S) at a plurality of different positions. In this case, the moving means moves along the rail member (44) extending in the circumferential direction of the lining space (S) outside the lining space (S) and along the rail member (44). It is possible to provide a carriage (5A, 5B) that is provided so as to support the support member (6).

  In the present invention, since the support member is moved by the moving means, if the minimum support member is provided, the vibrator can be advanced and retracted into the lining space at different positions. Therefore, an increase in cost can be avoided.

  In addition, the code | symbol in the said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later.

  As described above, according to the tunnel lining concrete compaction apparatus of the present invention, it is possible to compact the cast concrete at a plurality of positions in the circumferential direction of the lining space with a minimum number of support members. Because it can, cost increase can be avoided.

  FIG. 1 shows a transverse cross section of a tunnel slide centle equipped with a tunnel lining concrete compaction device of the present invention, and FIG. 2 shows a longitudinal section thereof. In FIG. 1, a slide center 1 is provided with a portal gantry 2 through which a vehicle can pass, and the gantry 2 has an arched lining formwork (hereinafter simply referred to as “covering form”). 3) is supported. A lining space S in which concrete for secondary lining is placed is formed in a substantially semicircular arc shape between the outer peripheral wall of the mold 3 and the inner peripheral wall of the tunnel T. The gantry 2 has a certain length in the front-rear direction perpendicular to the paper surface. A wheel 22 is provided at the lower end of the leg portion 21 at the front-rear end and is positioned on the rail 23. Further, auxiliary jacks 25 are provided at the lower ends of the plurality of leg portions 24 located in the middle of the gantry 2 in the front-rear direction. Note that the left and right halves in FIG. 1 are cross sections at different positions in the longitudinal direction of the gantry.

  As shown in FIG. 2, the mold 3 is formed by connecting a plurality of identical mold members 31 having a constant width in the front-rear direction, and each frame member 31 has a top end form 32 (see FIG. 1) It is comprised from the lower end form 34 connected with the lower end of the side form 33 which is connected to the lower surface of both ends of the top-end form 32 so that rotation is possible, and the lower end of the side form 33 so that rotation is possible. The top end form 32 is supported by a plurality of jacks 26 provided in the front-rear direction on the top of the gantry 2 so as to be movable up and down. The side foam 33 and the lower foam 34 are connected to the legs 21 and 24 of the gantry 2 by jacks 27 and 28, respectively, and are rotated inward and outward.

  In FIG. 2, a support frame 42 protrudes outwardly from a work frame 41 protruding from the outer end of the gantry 2, and the support frame 42 has a plurality of intervals in the longitudinal direction. Support pillars 43 are erected, and rail members 44 are supported by these support pillars 43. As shown in FIG. 1, these rail members 44 are curved in an arc shape along the top end form 32 as shown in FIG. 1, and are disposed in a region shorter than the length of the top end form 32.

  Two carriages 5A and 5B are mounted on the rail member 44 in the front row and the rear row in the left and right positions (FIG. 3) so as to be movable along the rail members 44. As shown in FIG. 4, the carriages 5 </ b> A and 5 </ b> B support a support pipe 6 as a rod-like support member in which a vibrator is installed in the tip portion 61 so as to be movable in the axial direction. The support pipe 6 is drawn outward from the outer end of the mold member 31 located on the outermost side, and a power supply cable (not shown) to the vibrator is drawn from the rear end 62 (FIG. 2). .

  Each carriage 5A, 5B includes an elongated base body 51 (FIG. 2) that extends in the longitudinal direction of the tunnel T by connecting the support columns 43, and a moving mechanism portion 52 that projects between the front and rear rail members 44 from the lower surface of the front end portion. I have. The support pipe 6 is slidably accommodated in the base body 51 (FIG. 3) having a U-shaped cross section, and the base body 51 is provided with traveling rollers 511 (FIG. 3, FIG. 4), it is placed on each rail member 44.

  The moving mechanism 52 has a rectangular case 521 (FIG. 4), and a rotating shaft 71 is provided through the case 521 in the longitudinal direction. The rotating shaft 71 is supported by bearing members 72 provided on the front and rear end surfaces of the case 521, and sprockets 73 are mounted on both ends of the rotating shaft 71 protruding from the case 521. The roller 44 is fixed to the lower surface of the member 44. A large sprocket 75 is provided at an intermediate portion of the rotating shaft 71, while a parallel body 522 protruding from the rear lower surface of the case 521 is provided with a shaft 77 that is rotated by a handle 76. A small sprocket 78 mounted on the shaft body 77 and the sprocket 75 are connected by a chain 79. As a result, when the handle 76 is rotated, the sprocket 73 is rotated forward and backward with respect to the roller chain 74 accordingly, and the carriages 5A and 5B and the support pipe 6 placed thereon are moved along the rail member 44. It is moved backwards.

  A pullout winch 82 provided with a motor 81 is provided on the lower surface of the front portion of the case 521, and a wire 83 drawn from the winch 82 reaches the tip of the support pipe 6 through a sheave 84 provided at the front end of the base 51. Is bound to. On the other hand, at the innermost end of the gantry 2, there are provided retractable winches 86 with motors 85 (FIG. 4) supported by gantry (not shown) at four symmetrical positions (FIG. 3). The formed wire 87 extends outward in the lining space S through anchor bolts 88 driven into the end face of the existing lining concrete C, so that the lining space S is blocked from the outside. The end plate 311 attached to the outer end of 31 is drawn outwardly from an opening 312 provided with seal packing and coupled to the tip of the support pipe 6.

  In the compacting device having such a structure, when lining concrete is poured into the lining space S, from between the lower end foam 34 of the mold member 31 and the tunnel T inner peripheral wall, between the side foam 33 and the tunnel T inner peripheral wall. During this time, the lining concrete enters, and during this time, a vibrator is inserted from an inspection port provided at an appropriate position of the mold member 31 to compact the lining concrete. When the lining concrete ascends between the top end form 32 and the inner peripheral wall of the tunnel T, the handle 76 of each moving mechanism 52 is turned so that the support pipe 6 on each carriage 5A, 5B is moved along the rail member 44. It is moved and placed at the position shown in FIG. 3 on the side far from the top of the top form 32. At this position, as described above, the wire 87 drawn from the pull-in winch 86 is coupled to the tip of the support pipe 6 (FIG. 5A). Thereafter, while energizing and vibrating the vibrator in the support pipe tip 61, the wire 87 is wound up by the retracting winch 86, and the support pipe 6 is taken into the lining space S from the opening 312 (FIG. 4) of the end plate 311. To enter. When the tip of the support pipe 6 comes close to the outer end surface of the existing lining concrete C (FIG. 5B), the drawing winch 86 is stopped, and then the wire 87 is cut. Then, the drawing winch 82 is activated to wind up the wire 83, and the support pipe 6 is gradually pulled out from the lining space S (FIGS. 5C and 5D). In this way, the lining concrete that has entered the lining space S between the top end form 32 and the inner peripheral wall of the tunnel T can be compacted.

  As the lining concrete is further poured between the top end form 32 and the inner peripheral wall of the tunnel T, the handle 76 of each moving mechanism 52 is turned to rail the support pipe 6 on each carriage 5A, 5B. It is moved along the member 44 to a position X (FIG. 3) on the side close to the top of the top end form 32. And the wire 87 pulled out from the winch 86 for drawing in is couple | bonded with the front-end | tip of each support pipe 6, Hereinafter, the above-mentioned process is repeated and the poured lining concrete is compacted.

  In the embodiment described above, a pair of left and right carts 5A and 5B are provided, and the support member 6 is caused to enter the lining space S at four locations with different circumferential directions with respect to the lining space S on the top end form 32. In addition, this may be performed by a single carriage, or a retractable winch 86 may be added to allow the support member 6 to enter the lining space S at four or more locations. The lining space S is not limited to the portion on the top end form 32. Moreover, it can replace with the winches 82 and 86 and the wires 83 and 87 which move the support pipe 6, and can also use the holding | grip mechanism and feed mechanism which are shown by patent document 1. FIG.

1 is a cross-sectional view of a tunnel slide centle equipped with a tunnel lining concrete compaction device according to an embodiment of the present invention. It is a longitudinal cross-sectional view of the slide centile for tunnels provided with the compaction apparatus of tunnel lining concrete. It is a front view of the compaction apparatus of tunnel lining concrete. It is a side view of the compaction apparatus of tunnel lining concrete. It is a side view explaining the action | operation of the compaction apparatus of tunnel lining concrete.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Slide center, 2 ... Gantry, 3 ... Formwork for lining, 44 ... Rail member (moving means), 5A, 5B ... Cart (moving means), 6 ... Support pipe (supporting member), S ... Covering space , T ... Tunnel.

Claims (2)

A tunnel lining concrete compaction device for compacting lining concrete placed in the lining space formed between the inner wall surface of the tunnel and the lining formwork disposed inside the tunnel. A support member that supports the vibrator for compaction so that the vibrator can be advanced and retracted from outside the lining space, and the support member is moved so that the vibrator can be advanced and retracted into the lining space at a plurality of different positions. And a tunnel lining concrete compaction device. The moving means includes a rail member that extends in the circumferential direction of the lining space outside the lining space, and a carriage that is provided on the rail member so as to be movable along the rail member and supports the supporting member. The tunnel lining concrete compaction device according to claim 1.

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