JP2005248540A - Lining material timbering device for tunnel curved section - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a timbering device for use in executing secondary lining by covering primary lining of a tunnel curved section with a synthetic resin lining material, and filling a gap between the lining material and the primary lining with an infilling material such as cement milk, wherein the timbering device can easily and positively support the lining material lined along the tunnel curved section. <P>SOLUTION: The lining material timbering device is formed of a linear section timbering body 2 which is cylindrical and assemblable, and supports a linear section r2 of the lining material R, and a curved section timbering body 1 which is assemblable and connected to the linear section timbering bodies 2, 2 adjacent thereto at a desired bending angle. Then the plurality of linear section timbering bodies 2 and the plurality of curved section timbering bodies 1 are connected together in a tunnel lengthwise direction, to thereby support an inner surface of the lining material R lined along a tunnel curved section T. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a support device for supporting a synthetic resin lining material, which is a lining member constructed along a tunnel curved portion, from the inside when lining a tunnel curved portion excavated by a shield method or the like. It is.

  In shield construction, primary lining is applied to the inner surface of a tunnel excavated by the shield method, and then secondary lining is performed using concrete. Concrete is resistant to chemicals and wear. Therefore, in recent years, instead of secondary lining with concrete, lining is performed using a synthetic resin lining material having flexibility and appropriate rigidity such as high-density polyenelene. Construction methods have been developed.

  In this method, for example, as described in Patent Document 1, a strip-shaped lining material is formed into a short cylinder shape, and this short cylinder-shaped lining material is formed along the inner surface of the primary lining in the tunnel length direction. In order to cover the primary lining by connecting them sequentially, the filling between the lining material and the primary lining is filled with a filling material such as cement milk. At this time, buoyancy is generated in the lining material due to filling of the filling material, and the lining material is changed in position or the lining material is deformed due to gravity or liquid pressure by the filling material itself acting on the lining material. There is a fear.

  Therefore, as described in Patent Document 2, a support member is formed by connecting a plurality of support members formed by bending a steel material having an I-shaped cross section in an arc shape so as to be foldable with each other. The inner circumferential surface of a predetermined portion of the lining material that is assembled in a ring shape and covers the primary lining is supported, and such a support form of the lining material by the support is provided at regular intervals in the tunnel length direction. Adjoining supports are connected by a thread member made of a plurality of square steel pipes that are long in the tunnel length direction. When the filling material is solidified, the threading member is removed from the support tool, and the support tool is folded and transferred to the next lining position, and used again for supporting the inner peripheral surface of the lining material.

JP 2000-34892 A JP 2002-309899 A

  However, since the support is formed of a steel material having an I-shaped cross section, the support surface for the lining material cannot be sufficiently supported by the support tool alone, and the inner surface of the lining material cannot be sufficiently supported. In this way, adjacent support members are connected by a through member made of a plurality of square steel pipes, and a part of the lining material exposed between the support members is supported at predetermined intervals in the circumferential direction by these through members. However, connecting a long threaded member between adjacent supports in a tunnel with a narrow work space is not only workable, but also takes time when disassembling and transporting to the next lining position. There is a problem that the lining work cannot be performed smoothly.

  In addition, even if the lining material is supported by the support member or the threading member, the lining material itself is floated by the filling material that is injected and filled between the lining material and the primary lining. Even if it tries to prevent it through the through member from the side where the filling material is hardened, it is difficult to reliably prevent it, and there is a possibility that the secondary lining will be displaced, and it connects between adjacent supports Since the number of threading members to be used must be limited to the minimum necessary number in view of workability and the like, the area of the lining material exposed between the threading members adjacent in the circumferential direction of the tunnel becomes relatively large, and filling filling is performed. There is a problem that the portion bulges and deforms toward the tunnel due to the pressure of the material.

  Furthermore, in order to apply a secondary lining to the curved part of the tunnel, the opposing end parts of the short cylindrical lining material to be connected to each other are formed on the inclined end face by obliquely cutting according to the bending degree of the curved part. Along with the primary lining, a cylindrical lining material with a bent central part is formed by abutting and connecting these inclined end faces together, and a plurality of the lining materials are applied to the curved part of the tunnel. After forming the curved tubular lining material covering the primary lining by connecting in the tunnel length direction in turn, the filling material is filled in the gap between the primary lining and the lining material. Secondary lining can be applied, but in this case, the inner circumferential surface of the lining material bent along the tunnel curve portion cannot be supported by the steel member having the I-shaped cross section and the threading member, and the lining is separately provided. It is necessary to prepare a supporting member that can support the inner peripheral surface of the bent portion, and it is necessary to prepare various supporting members having shapes that can correspond to the degree of bending of the tunnel curved portion. As a result, there are problems that the handling becomes difficult and the assembling work becomes complicated and the working efficiency is lowered. It is an object of the present invention to provide a lining material support device in a tunnel curve portion that can completely eliminate such problems.

  In order to achieve the above object, the lining material support device for a tunnel curved portion according to the present invention, as described in claim 1, is a synthetic resin for excavation wall surface in a tunnel curved portion or a primary lining constructed on the excavation wall surface. Along with the tunnel curve portion, when filling the gap between the excavation wall surface and the lining material or filling the filling material into the gap between the primary lining and the lining material A lining material supported from the inner surface side, comprising a bent portion support body for supporting the bent portion of the lining material and a straight portion support body for supporting the straight portion of the lining material. The straight part support body is configured to form a cylindrical support body by combining a plurality of rectangular support members curved in an arc shape in the circumferential direction of the tunnel, while the bent part support body is adjacent A straight bracket that is adjacent to and interposed between a support bracket projecting in the tunnel length direction at small intervals in the circumferential direction on the opposing end surface of the straight support body and each pair of support brackets facing in the tunnel length direction. It is composed of a square steel pipe that detachably fixes both ends to the above-mentioned pair of support fittings according to the interval between the opposing end faces of the part support body, and these straight part support body and bending part support body are A plurality of lining materials connected in the tunnel length direction and lined along the tunnel curved portion are supported.

  In the lining material supporting device in the tunnel curved portion configured as described above, the invention according to claim 2 is characterized in that the straight portion supporting body is formed of a lower supporting member in which a skin plate is stretched on an outer surface of a rectangular frame. A plurality of connecting members are integrally provided in the rectangular frame without connecting a skin plate to the outer surface of the rectangular frame and are connected to each other. A mounting hole for detachably mounting the spud is provided in the end support member and the both side support members, and the spat is inserted from the mounting hole through the insertion hole provided in the lining material, and the tip is covered with the tunnel excavation wall surface or primary covering. By contacting and receiving the inner peripheral surface of the work, the lining material is prevented from being lifted when filling the filling material.

  Moreover, the invention which concerns on Claim 3 is a horizontal bottom face board part which supports the inner surface facing the tunnel in the edge part of a square steel pipe for the said support metal fitting protrudingly provided by the opposing end surface of the adjacent linear part support body. A side plate that refracts at a right angle from one side end of the horizontal bottom plate and receives one side of the end of the square steel tube; It is characterized by comprising a bolt body that presses the inner surface of the end portion outward and presses the outer surface of the square steel pipe against the inner peripheral surface of the lining material.

  According to the apparatus for supporting a lining material in a curved curve portion of the present invention, a bent portion supporting body that supports a bent portion of the lining material, and the bent portion of the lining material are connected in the length direction of the bent portion. A straight support body that supports the straight portion of the lining material. The straight support body is a cylindrical support body by combining a plurality of rectangular support members that are curved in an arc shape in the circumferential direction of the tunnel. In the tunnel straight part, only the cylindrical straight part support body is used, and these cylindrical support bodies are sequentially connected in the tunnel length direction. As a result, it is possible to efficiently assemble a support structure that continuously supports the entire inner peripheral surface of the lining material applied to the straight part of the tunnel. By connecting the cylindrical straight part support body in the tunnel length direction sequentially by the bent part support body, it is possible to support the inner peripheral surface of the lining material constructed in a curved shape along the tunnel curved part. A continuous support body can be assembled in a polygonal shape.

  In addition, the bent portion support body includes a support fitting projecting in the tunnel length direction at small intervals in the circumferential direction on the opposing end surface of the adjacent straight portion support body, and a pair of each of the pairs facing the tunnel length direction. Since both ends thereof are configured to be removably fixed to the pair of support brackets according to the distance between the opposing end surfaces of the adjacent straight support members interposed between the support brackets, they are adjacent to each other. A square steel tube of a predetermined length is interposed between each pair of supporting metal fittings facing in the tunnel length direction in the straight section support body in a erected state, and the distance between the tunnel top end side and the space between the bottom side is determined by the tunnel curve portion. After adjusting according to the degree of bending, the straight part support body and the bending part support body are sequentially and accurately located along the tunnel curve part by fixing both ends of each square steel pipe to the pair of support brackets. And can be easily connected in a polygonal shape. Can be assembled 支保 body the inner circumferential surface along the Le curved portion curved in construction and the lining material can be entirely 支保 efficiently.

  Furthermore, as a support metal fitting, a horizontal bottom surface plate portion that supports the inner surface facing the tunnel at the end portion of the square steel pipe, and one side surface at the end portion of the square steel pipe that is refracted at a right angle from one side end of the horizontal bottom surface plate portion And a bolt that presses the outer surface of the square steel pipe against the inner peripheral surface of the lining material. The two ends of the square steel pipe can be easily and reliably arranged in a erected state between the horizontal bottom plate portions of the support metal fittings facing in the tunnel length direction. The square steel pipe can be accurately oriented in the tunnel length direction by the side plate part refracted perpendicularly from the part, and in this state, the square steel pipe is firmly attached to the inner peripheral surface of the lining material by screwing the bolt body. Can be pressure-contacted, The bent portion of the ingredients can be reliably 支保.

  The straight portion support body includes a lower support member formed by stretching a skin plate on the outer surface of the rectangular frame body, and a plurality of pieces in the rectangular frame body without stretching a skin plate on the outer surface of the rectangular frame body. Consists of connecting top and bottom support members that are integrally connected to each other, and support members that are connected to each other. These support members are combined to form a cylindrical support body that supports the inner peripheral surface of the lining material. Thus, the area for supporting the lining material is large and the lining material can be reliably supported.

  Further, by providing mounting holes for detachably mounting the spuds on the top end support member and the both side support members, the spuds can be removed when transporting or assembling these support members. In addition, there is no hindrance to transportation, assembly work, etc. In addition, the tip of the spud is inserted from this mounting hole through the insertion hole provided in the lining material at the time of assembly, and the inner peripheral surface of the tunnel excavation wall or primary lining By contacting and receiving the lining material, it is possible to reliably prevent the lining material from being lifted when the filling material is filled. Further, by removing the spud from the spud mounting hole after use, it can be used many times to prevent the next lining material from being lifted.

  Further, the top end support member and the both side support members provided with the spud mounting holes are not provided with a skin plate on the outer surface thereof, and are formed between a plurality of connecting members in parallel with each other in the rectangular frame body. Since the structure is formed by connecting the spuds to the insertion holes, the positions of the spud insertion holes provided in the lining material through the space between the adjacent connecting materials communicating between the inside and outside, or the space between the connecting material and the frame portion, and the spuds with respect to the insertion holes. While confirming the mounting position, the assembly work of the support member and the mounting work of the spud can be performed, and these operations can be performed reliably and efficiently. In addition, since the pressure of the filling material acting on the upper and both sides of the lining material supported by the top end support member and the both side support members is smaller than that on the bottom surface side, the rectangular frames constituting these support members There is no possibility that the upper portion and both side portions of the inner peripheral surface of the lining material are securely and uniformly supported by the body and the plurality of connecting materials, and the lining material is partially bulged and deformed.

  On the other hand, a lower support member formed by stretching a skin plate on the outer surface of the rectangular frame is disposed on the lower side of the lining material on which a relatively large pressure is applied by the filled filling material. The lower portion of the lining material can be supported uniformly over the entire surface, the deformation of the lining material can be reliably prevented, and the filling material filled in the gap between the lining material and the tunnel excavation wall surface or primary lining is Since the lining material is protected by the skin plate even in an uncured state, there is no possibility of adversely affecting the filling material even when walking on the inner surface of the skin plate.

  A specific embodiment of the present invention will be described with reference to the drawings. In FIG. 1 and FIG. 2, the supporting device for the lining material R covering the primary lining S constructed on the excavation wall surface of the tunnel curved portion T is shown in FIG. The bent portion support body 1 for supporting the bent portion r1 of the lining material R and the straight portion support body 2 for supporting the straight portion r2 of the lining material R are shown in FIG. As shown in FIG. 5, it consists of a rectangular top end support member 2A, both side support members 2B, 2B and a lower support member 2C which are curved in an arc shape in the circumferential direction of the tunnel, and these support members 2A to 2C are respectively In the figure, the upper ends of the two-side support members 2B and 2B are connected to the two side ends of the top end support member 2A. Each is connected so that it can be folded inward, and the lower support The retaining member 2C is separated from the top end supporting member 2A and the two side supporting members 2B, 2B, and the lower end surfaces of the both supporting members 2B, 2B are joined and connected to the side end surfaces facing upward. It is configured as follows. The top end support member 2A, the two side support members 2B and 2B, and the lower support member 2C have the same width in the tunnel length direction.

  The top end supporting member 2A and the two side supporting members 2B and 2B are formed in a rectangular U-shaped or L-shaped steel frame and a rectangular frame body 2A1 and 2B1 which are integrally combined with each other. It is formed by integrating a plurality of connecting members 2A2 and 2B2 made of L-shaped section steel between the opposing surfaces of the front and rear frame parts curved in an arc shape, and the lower front and rear parts of both side support members 2B and 2B. Are provided with connecting holes 23 and 23 for detachably connecting a jack 48b of an assembling / disassembling device 48 provided in a transport carriage 40 described later. Further, a spud in which a mounting hole 4 of a spud 3 to be described later is provided in the central portion of the rectangular frame body 2A1 of the top end support member 2A and the central portion of the rectangular frame body 2B1 of the both side support members 2B and 2B. The mounting plate 5 is attached so as to be movable and adjustable in the tunnel length direction and the tunnel circumferential direction.

  Specifically, the fixed frame 6 is fixed to the four sides of the rectangular frame 2A1 of the top end support member 2A and the central part of the rectangular frames 2B1 of the two side support members 2B and 2B, and the spud is placed on the fixed frame 6. The mounting plate 5 is mounted so as to be movable and adjustable in the tunnel length direction and the tunnel circumferential direction in a state in which the mounting hole 4 communicates with a hole 6a provided in the central portion of the fixed frame 6. As a mechanism for slidingly moving 5 on the fixed frame 6, for example, as shown in FIGS. 6 and 7, a screw rod 7 made of a long bolt is provided at the center of the end of the spud mounting plate 5 facing the tunnel circumferential direction. Attaching the screw rod 7 to the connecting members 2A2 and 2B2, the long holes 8a in the tunnel length direction, and the tunnel length direction provided to the support plate 9 fixed to these connecting members 2A2 and 2B2 The end of the screw rod 7 that is inserted into the long elongated hole 8b and protrudes from the support plate 9 The sprue mounting plate 5 is moved in the circumferential direction of the tunnel by rotating the nut body 10 in a state where the nut body 10 is screwed and received by the support plate 9, and the screw rod 7 is moved along the long holes 8a and 8b. The spud mounting plate 5 is configured to move in the tunnel length direction by moving in the length direction.

  The spud mounting hole 4 provided in the spud mounting plate 5 is formed of a screw hole, and a cylindrical body 11 having a screw portion 11a that is screwed into the mounting hole 4 on the outer peripheral surface of the mounting hole 4 is removably threaded. The half of the cylinder 11 that protrudes inward from the mounting hole 4 through the hole 6a of the fixed frame 6 is not provided with a threaded portion 11a. A hole 12 is provided. The spud 3 is removably inserted through the cylinder 11.

  The spud 3 is a base end (inner end) of a shaft body portion 3a having a certain length inserted through the spud insertion hole 13 provided in the cylindrical lining material R covering the primary lining S constructed on the tunnel excavation wall surface. ) Is integrally provided with a rod-shaped head portion 3b having a diameter larger than that of the shaft body portion 3a, and penetrates the rod-shaped head portion 3b in the diameter direction so as to match the handle insertion hole 12 at small intervals in the length direction. A handle locking hole 14 is provided. A ring-shaped reinforcing member is integrally provided on the outer peripheral surface of the cylindrical lining material R at small intervals in the tunnel length direction. Further, the spud insertion hole 13 is configured to be closed by a plug body (not shown) made of the same synthetic resin material as the lining material R after the spud 3 is removed. The lining material R is made of a synthetic resin material having flexibility and moderate rigidity such as polyethylene, polypropylene, and polyvinyl chloride, and having excellent chemical resistance and wear resistance.

  On the other hand, the lower support member 2C constituting the cylindrical straight part support body 2 that supports the inner peripheral surface of the lining material R together with the top end support member 2A and both side support members 2B and 2B is as shown in FIG. Further, the skin plate 2C3 is stretched over the entire outer surface of the rectangular frame 2C1 curved in the circumferential direction of the tunnel, and the spud 3 is not attached.

  The rectangular frame 2C1 of the lower support member 2C is also formed by combining a U-shaped cross section or L-shaped steel in the same manner as the top end support member 2A and the two side support members 2B and 2B. A plurality of connecting members 2C2 are integrally fixed to the opposing end surfaces of the front and rear frame portions by welding or the like with the connecting members 2C2 in 2C1 having the length direction in the tunnel length direction.

  This lower support member 2C may be a single piece, but is divided into two divided support portions so that handling such as transportation can be easily performed, and the inner portion at the opposite end portion is pivoted by a pivot 15a. It is connected so that it can be folded inward, and the outer side portions on the opposite side end surfaces are brought into contact with each other so as not to open any further. Similarly, in the connection structure of the upper end portions of the two side support members 2B and 2B with respect to both side ends of the top end support member 2A, the inner portions of the opposite side end portions are connected to each other so as to be foldable inward by the pivot 15b. In addition, the opposite end surfaces outside the pivot 15b are brought into contact with each other so that they cannot be opened any further.

  Further, at the center of the inner surface of the above-mentioned both-side split support portion of the lower support member 2C, protrusions 16, 16 whose upper surface is flat in the tunnel length direction are formed over the entire length in the tunnel length direction. Rails 17 and 17 are laid and fixed on the strips 16 and 16, respectively, and the lower end surfaces of the two side support members 2B and 2B can be detached inwardly on the upper end surfaces on both sides of the lower support member 2C. By joining and receiving and connecting and fixing these end face portions with bolts (not shown), the configuration of the cylindrical straight portion support body 2 is maintained. Furthermore, locking holes 18 and 18 for locking the lower ends of the links of the suspension device 46 described later are provided in the front and rear sides of the protrusions 16 and 16.

  On the other hand, as shown in FIG. 8, the bent portion supporting body 1 for supporting the bent portion r1 of the lining material R is small in the circumferential direction on the opposing end surfaces of the straight portion supporting bodies 2 and 2 adjacent to each other in the tunnel length direction. Supporting adjacent straight parts between the support brackets 1A and 1A projecting in the tunnel length direction at every interval and the pair of support brackets 1A and 1A facing in the tunnel length direction in an erected state It consists of a square steel pipe 1B that removably fixes both ends to the pair of support brackets 1A and 1A according to the distance between the opposing end faces of the bodies 2 and 2, and this square steel pipe 1B is supported by a straight part. It has a fixed length shorter than the interval width between the said opposing end surfaces of the bodies 2 and 2.

  The structure of the support bracket 1A will be described in detail. As shown in FIGS. 9 to 11, the support bracket 1A is attached to the annular end face of the straight portion support body 2 in the tunnel length direction by bolts or the like. Seat plate 1A1, horizontal bottom plate 1A2 with its base end surface fixed to the mounting plate 1A1 in the tunnel length direction by welding, etc., and outward from one end of this horizontal bottom plate 1A2 The end of the square steel pipe 1B is supported by the side plate 1A3 while supporting the end of the inner surface facing the tunnel inside of the support bracket 1A on the horizontal bottom plate 1A2. Is formed in an L-shaped cross section so as to receive one side. Further, a bolt body 1A4 is threaded from the inner surface side into a screw hole 19 provided in the center of the horizontal bottom plate portion 1A2, and the inner surface of the end portion of the square steel pipe 1B is pressed outwardly by the tip surface of the bolt body 1A4. Then, the outer surface of the square steel pipe 1B is configured to be pressed against the inner peripheral surface of the bent portion r1 of the lining material R as shown in FIG.

  Further, on the outer end surfaces of the front and rear frame portions of the lower support member 2C in the straight portion support body 2 provided with the rails 17 and 17, the connecting rail mounting member 24 in the direction in which these rails 17 and 17 are extended, 24 (shown in FIG. 2) is detachably attached by bolts or the like, and between the adjacent straight part supporting bodies 2, 2 and the lower supporting members 2C, 2C of the connecting rail member mounting members 24, 24 facing each other. A short rail member 17 ′ is connected in an erected state so that the rail 17 is continuous.

  Next, the inner peripheral surface of the lining material R covering the primary lining S in the tunnel curved portion T is supported by using a plurality of the bent portion supporting bodies 1 and the straight portion supporting bodies 2 configured as described above. How to do it. The lining material R is a cylindrical lining material R ′ having a certain length, and the opposite end perpendicular to the axis of the R ′ is inclined diagonally from one to the other in the diametrically opposed portion as shown in the figure. The inclined end surfaces 20 and 20 are formed by cutting. In this case, when these cylindrical lining materials R ′ and R ′ are connected, the outer peripheral surface thereof is bent according to the curved portion in the primary lining S where these lining materials R ′ and R ′ are arranged ( The inclination angle of the inclined end faces 20 and 20 is set so that the refractive index becomes (refractive index).

  In this way, a plurality of cylindrical lining materials R ′ having inclined end surfaces 20 are joined to each other along the inner surface of the curved portion of the primary lining S, which is constructed on the tunnel curved portion T by sequentially welding the opposite end surfaces to each other. By connecting in the tunnel length direction, a tubular lining material R bent into a polygonal shape covering the inner surface of the curved portion of the primary lining S is applied. In addition, a linear tubular lining material is formed on the inner surface of the primary lining applied to the straight portion of the tunnel by sequentially connecting the cylindrical lining material R ′ as it is in the tunnel length direction.

  Next, the inner peripheral surface of the tubular lining material R bent into the polygonal shape is supported by assembling a plurality of bent portion support bodies 1 and straight portion support bodies 2 along the inner peripheral surface. In this case, as shown in FIG. 1, the bent portion supporting body 1 is disposed on the inner peripheral surface of the bent portion r1 of the lining material R, and the inner portions of the straight portions r2 on both sides of the bent portion r1 in the lining material R are arranged. The straight part supporting bodies 2 and 2 are disposed on the peripheral surface. Therefore, the sum of the length in the tunnel length direction of the bent portion r1 connecting the lining materials R ′ and R ′ and the length in the tunnel length direction of the straight portion r2 of the single lining material R ′ is The one bent portion support body 1 and the straight portion support body 2 are formed to be substantially equal to the sum of the lengths in the tunnel length direction. Furthermore, if the length of the straight portion support body 2 in the tunnel length direction is 1500 mm, for example, the length of the bent portion support body 1 in the tunnel length direction is about 1/3. The length of the square steel pipe 1B constituting a part of the bent portion supporting body 1 is shorter than the length of the bent portion supporting body 1 in the tunnel length direction.

  The bent portion supporting body 1 is arranged on the inner peripheral surface of the bent portion r1 of the lining material R, and the bent portion supporting body 1 is formed on the straight portions r2 on both sides refracted in the tunnel bending direction through the bent portion r1. The straight support members 2 and 2 connected to both sides of the lining material R are refracted at the same angle in the bending direction of the tunnel curved portion T, and the outer peripheral surface of the straight portion r2 on both sides of the bent portion r1 in the lining material R is formed. In order to support the inner peripheral surface, the interval W1 between the opposed end surfaces of the straight-shaped support members 2 and 2 connected to both sides of the bent portion support member 1 is larger than the outer peripheral side interval W1 of the tunnel curved portion T. Since the inner peripheral side interval W2 becomes narrow, the straight portion support bodies 2 and 2 on both sides are connected by the bent portion support body 1 in this state.

  That is, the straight portion support bodies 2 and 2 are placed in the straight portions r2 and r2 on both sides of the bent portion r1 in the lining material R, and the outer peripheral surfaces thereof are in contact with the inner peripheral surfaces of the straight portions r2 and r2. When assembled in a cylindrical shape as described above, the distance between the opposing end surfaces of the straight part supporting bodies 2 and 2 is wide as described above, the distance W1 on the outer peripheral side of the tunnel curved part T is wide, and the distance W2 on the inner peripheral side is As shown in FIG. 12, the pair of supporting metal fittings 1A and 1A facing the tunnel length direction fixed to the opposing end faces of these straight-part support bodies 2 and 2 are naturally tunnels. The distance between the pair of support brackets 1A and 1A on the outer peripheral side of the curved portion T is wide, and the distance between the pair of support brackets 1A and 1A on the inner peripheral side is narrow. In this state, each pair of support brackets 1A and 1A A square steel pipe 1B is installed in between, and both ends of the square steel pipe 1B are supported on the horizontal bottom plate 1A2, and both ends of the square steel tube 1B are threaded through the horizontal bottom plate 1A2. By screwing the bolt body 1A4, the outer surface of the square steel pipe 1B is pressed against the inner surface of the bent portion r1 of the lining material R, and is held between the inner surface of the bent portion r1 and the bolt body 1A4 to maintain the above-mentioned distance. It is to be fixed in the state.

  In addition, the rail member 17 'is fixed in a erected state between the connecting rail member mounting members 24, 24 facing each other in the lower support members 2C, 2C of the linear support members 2, 2. In addition, a square steel pipe 1B is installed in advance between the pair of support brackets 1A and 1A fixed to the opposing end surfaces of the straight-part support bodies 2 and 2, and these straight-part support parts are supported. As described above, the straight portions r2 and r2 of the lining material R on both sides of the bent portion r1 in the lining material R have the straight portion support bodies 2 and 2 with the outer peripheral surfaces of the straight portions r2 and r2, respectively. After being assembled in a cylindrical shape so as to be in contact with the surface, it may be fixed to the inner surface of the bent portion r1 of the lining material R by the bolt body 1A4.

  Further, when the cylindrical straight portion supporting bodies 2 and 2 are arranged on the straight portions r2 and r2 on both sides of the bent portion r1 in the lining material R, as described above, these straight portion supporting bodies 2 and The distance between the two opposing end faces naturally takes a form corresponding to the degree of bending of the bent portion r1, and in this state, the bent portion support body 1 is connected with the interval maintained as described above. When the bending degree of the tunnel curved portion T is relatively moderate, two or more straight shapes are provided without alternately arranging the bent portion supporting bodies 1 and the straight portion supporting bodies 2 in the tunnel length direction. It is good also as a support body structure which arrange | positioned one bending part support body 1 whenever the part support body 2 is connected.

  As described above, each time the support body having a fixed length for supporting the inner peripheral surface of the lining material R is formed by the connection between the plurality of bent portion support bodies 1 and the straight portion support body 2, the lining material is provided. As shown in FIG. 1, an annular gap 21 between R and the primary lining S is filled with, for example, a filling material 22 made of cement milk in which cement, bentonite, and water are mixed at a predetermined ratio, and cured. A secondary lining is constructed.

  The bent part support body 1 and the straight part support body 2 that support the inner peripheral surface of the lining material R are support bodies that support the lining material R previously constructed as a secondary lining, and the lining material The support body disassembled after the filling material 22 filled in the gap 21 between the material R and the primary lining S is hardened is used, and the lining material R which is newly secondary lining the support body is used. Transfer to position and reassemble.

  As an apparatus for transferring these support bodies 1 and 2 and assembling them into a cylindrical shape, for example, a transport carriage 40 as shown in FIGS. 14 and 15 can be adopted. The carriage 40 is attached to the lower end of the gate-shaped front and rear legs 41, 42 by wheels 43 running on the rails 17 laid on the both-side divided support portions of the lower support member 2C in the straight support body 2. In addition, an arch-shaped receiving member 44 for receiving the inner surface of the top end supporting member 2A of the straight portion supporting body 2 is installed and fixed between the upper end surfaces of the gate-shaped front and rear legs 41, 42. The center portion of the horizontal fixed beam 45 that is long in the tunnel length direction is fixed to the center portion of the lower surface of the arch-shaped receiving member 44, and the front and rear legs of the horizontal fixed beam 45 are attached to the front and rear legs 41. , 42 project in the front-rear direction. Further, on this horizontal fixed beam 45, a trolley 47 provided with suspension devices 46, 46 of the lower support member 2C at the front and rear portions is disposed so as to be movable in the length direction of the horizontal fixed beam 45. .

  This suspension device 46 is a hoisting machine, and links 46a, 46a that are detachably locked to the inner surfaces of the both-side split support portions of the lower support member 2C are attached to both lower ends of the hoisting device so as to be rotatable in the left-right direction. Yes. In addition, the front and rear ends of both sides of the arch-shaped receiving member 44 are detachably connected to the locking holes 18 and 18 provided at the front and rear ends of the lower support members of the lower support member 2C. An assembly / disassembly device 48 for assembling and disassembling the support member 2A and the both-side support members 2B, 2B is provided. The assembly / disassembly device 48 includes a vertical fixed jack 48a fixed to both sides of the arch-shaped receiving member 44, and a movable jack 48b whose upper end is rotatably connected to the lower end of the fixed jack 48a in the left-right direction. Thus, the rod end of the movable jack 48b is configured to be detachably coupled to the coupling hole 23 provided in the both side support members 2B, 2B.

  The transport carriage 40 configured in this manner is connected in series, supporting the inner surface of a tubular lining material R formed by connecting a number of lining materials R ′ covering the primary lining S in series. The support bodies 1 and 2 are disassembled, transferred, and assembled while reciprocating in the support bodies 1 and 2 formed in a tubular shape.

  That is, when the filling material 22 filled and filled in the gap 21 between the primary lining S and the lining material R of a certain length is cured, first, the bent portion support for supporting the bent portion r1 of the lining material R is supported. Bolt body 1A4 which fixes both ends of each square steel pipe 1B in body 1 is loosened, and bent section support body 1 in which all square steel pipes 1B project from the opposite end faces of straight section support bodies 2 and 2 The brackets 1A and 1A are removed from each other, and these square steel pipes 1B are loaded on the transport carriage 40, and the straight part support body 2 disconnected by the square steel pipes 1B is disposed on the transport carriage 40. The top end support member 2A of the straight portion support body 2 that has been disassembled by the assembly / disassembly device 48 and supports the straight portion r2 of the lining material R is received on the arch-shaped support member 44. The both side support members 2B and 2B are suspended from the both side ends of the support member 44 from both side ends of the end support member 2A. Write to Tsu支 in the folded state the lower 支保 member 2C inwardly by lifting the sides dividing the support portion of the lower 支保 member 2C of the straight portion 支保 body 2 by a link 46a of Tsu支 device 46.

  With the disassembled support bodies 1 and 2 placed on the transport carriage 40, the transport carriage 40 is laid on both sides on the bottom side of the support bodies 1 and 2 supporting the lining material R as shown in FIG. On the rails 17 and 17 ', and moved forward to the position where the secondary lining should be performed next, along the inner peripheral surface of the lining material R covering the primary lining S at that position. A predetermined length portion of the lining material R is supported by assembling the support bodies 1 and 2.

  Specifically, when the transport carriage 40 moves to the front-end straight portion support body 2 that has been assembled first, the transport carriage 40 stops at that position. First, as shown in FIGS. The trolley 47 is moved along the horizontal fixed beam 45 protruding forward from the front leg 41 to the straight portion r2 of the lining material R at the front position from the straight portion support body 2 on the front end side, The lower support member 2C suspended by the links 46a, 46a of the front and rear suspension devices 46, 46 of the trolley 47 is suspended on the straight portion r2 to expand the both-side divided support portions, thereby supporting these both-side divided support. The outer surface of the skin plate 2C3 stretched on the part is in contact with the inner peripheral surfaces on both sides of the lower part of the straight part r2 of the lining material R.

  In this way, when the lower support member 2C of the straight portion support body 2 is suspended on the lower portion of the straight portion r2 of the lining material R, the straight portion r2 and the straight portion support body 2 on the foremost end side are suspended. The straight portion with a predetermined distance from the straight portion support body 2 on the foremost end side so that the bent portion r1 of a predetermined length (width) between the straight portion r2 of the lining material R supported by It is hung on the part r2. After that, on the bent portion r1 of the lining material R, there is a corner between the support brackets 1A and 1A protruding from the lower support member 2C and the lower support member 2C of the linear support body 2 on the foremost end side. The steel pipe 1B is erected in sequence, and the square steel pipe 1B is fixed by pressing both ends of the square pipe 1B against the bent portion r1 side of the lining material R with the bolt body 1A4 and mounting the rail materials 17 ′ and 17 ′.

  Thereafter, the carriage 40 is run on the rail 17 and the rail member 17 'from the front-most straight part support body 2 side on the newly installed lower support member 2C as shown in FIGS. 18 and 19. The top end support member 2A and the two side support members 2B, 2B supported by the arch-shaped receiving member 44 are positioned above the lower support member 2C, and the vertical position of the assembly / disassembly device 48 is at that position. By contracting the fixed jack 48a, the both side support members 2B, 2B are lifted upward from the arched receiving member 44, and the outer surface (upper surface) of the top end support member 2A is the upper circumference of the straight portion r2 of the lining material R Next, the both side support members 2B, 2B are pushed outward by hand or the like, so that the lower end pivots 15b, 15b of the top end support member 2A are deployed outwardly as the fulcrum, and the lining material R is straightened. Abutting against the inner surface of both sides of the cylindrical portion r2,支保 member 2B, the lower end surface of the 2B superimposed on both the upper end surface of the lower 支保 member 2C, connecting detachably by bolts or the like.

  Thus, the support bracket 1A projecting from the rear end surfaces of the top end support member 2A and the two side support members 2B and 2B newly assembled on the lower support member 2C, and the foremost straight portion support body 2 are provided. A square steel pipe 1B is sequentially installed between the support metal fittings 1A and 1A facing each other in the tunnel length direction between the top end support member 2A and the support metal fittings 1A protruding from the front end surfaces of the two side support members 2B and 2B. The bent portion supporting body 1 is configured by fixing the square steel pipe 1B by pressing both ends thereof against the bent portion r1 side of the lining material R with bolt bodies 1A4.

  The above-described straight part assembled with the straight part support 2 and the inner part of the straight part r2 of the lining material R is supported by the outer peripheral surface of the straight part support 2 newly assembled into a cylindrical shape. After the bent portion r1 of the lining material R is supported by the outer surface of a plurality of square steel pipes 1B arranged in an annular shape of the bent portion support body 1 connecting the support body 2, the top end The spud 3 is attached to each spud mounting hole 4 provided in the supporting member 2A and the two supporting members 2B and 2B so that the tip of the spud 3 is in contact with and received by the inner surface of the primary lining S. The floating of the lining material R generated when the filling material 22 is filled in the gap 21 between the lining S and the lining material R is prevented.

  As shown in FIGS. 6 and 7, the mounting procedure of the spud 3 is such that the mounting plate 5 provided with the spud mounting hole 4 is moved in the tunnel length direction and the tunnel circumferential direction by operating the screw rod 9. The spud attachment hole 4 is adjusted so as to communicate with the spud insertion hole 13 provided in advance in the lining material R on the same center line.

  In this case, the cylindrical body 11 is screwed into the spud mounting hole 4, and the tip of the shaft body portion 3 a of the spud 3 corresponds to the spud insertion hole 13 in a state where the spud 3 is inserted and supported in the cylindrical body 11. As described above, the spud mounting plate 5 is moved in the tunnel length direction or the tunnel circumferential direction while directly viewing the shaft body portion 3a from the inner side of the top end support member 2A and the both side support members 2B and 2B. When it matches with the insertion hole 13, the shaft body portion 4a is inserted into the insertion hole 13, and the handle body insertion hole provided in the cylindrical body 11 when the tip of the shaft body portion 3a reaches the vicinity of the primary lining S. 12 is connected to one spud locking hole 14 provided in the rod-shaped head 3b of the spud 3, and a handle (not shown) is inserted into these holes to rotate the handle. The tip of the spud 3 is brought into contact with the inner surface of the primary lining S.

  The primary lining S is formed, for example, by assembling a tube body or a steel segment. In the figure, the primary lining S is a steel segment, which is a spacer member 25 (with a constant thickness on the inner bottom of the steel segment assembled in a ring shape. (Shown in FIG. 5) are installed at appropriate intervals in the circumferential direction, and a lining material R ′ formed in a cylindrical shape on the spacer member 25 is installed between the primary lining S and the lining material R ′. A gap 21 is provided for forming the filling layer of the intermediate filling material 22 with a predetermined thickness over the entire circumference. The lining material R ′ is disposed along the inner surface of the primary lining S prior to the assembling work of the support body.

  Thus, after assembling a new straight portion support body 2 via the bent portion support body 1 in succession to the straight portion support body 2 on the foremost end side assembled first, the transport carriage 40 is shown in FIG. Is moved backward to the straight part support body 2 side of the last part of the series of support bodies 1 and 2 supporting the lining material R ', and the straight part support body adjacent to the straight part support body 2 is supported. All the square steel pipes 1B of the bent portion support body 1 connecting the body 2 are removed in the same manner as described above, and these square steel pipes 1B are loaded on the transport carriage 40 and are disconnected by the square steel pipe 1B. The straight portion supporting body 2 that has been supporting the straight portion r2 of the lining material R by disassembling the straight portion supporting body 2 at the rearmost portion by the assembling / disassembling device 48 disposed in the transport carriage 40. The top end support member 2A is received on the arch-shaped support member 44, and the both side support members 2B and 2B from the both ends of the top end support member 2A. From both side ends of the support member 44 in a state of being suspended downward. At the time of disassembling the straight portion support body 2, the filling material 22 has already hardened, and the spud 3 has been removed from the spud attachment hole 4 together with the cylindrical body 11, and the spat attachment hole 4 has a plug body. It is blocked by

  Next, the next straight portion support body adjacent to the straight portion support body 2 as shown in FIG. 21 is placed on the rail 17 of the lower support member 2C of the remaining straight portion support body 2 as shown in FIG. The trolley 47 is moved to the rear end side of the horizontal fixed beam 45 which is advanced to above the rail 2 and protrudes above the remaining lower support member 2C, and the links 46a, 46a of the suspension device 46 are moved. Is lowered and locked in the locking holes 35 provided in the both-side divided support portions of the lower support member 2C. When the links 46a and 46a are raised in this state, the both-side divided support portions of the lower support member 2C are folded inward about the pivot 15a and are suspended from the suspension device 46.

  After that, the carriage 40 is moved forward on the rail into the straight part support body 2 assembled previously, and stopped on the lower support member 2C of the support body 2 to move the trolley 47 forward as described above. The lower support member 2C suspended by the trolley 47 is placed on the lower peripheral part of the straight part r2 of the lining material R exposed forward from the straight part support 2 assembled above. In the same manner as described above, the lower end of the bent portion r1 of the lining material R exposed between the rear end and the front end of the lower support member 2C of the straight support member 2 assembled earlier is installed and installed. A square steel pipe 1B is installed between each pair of front and rear support brackets 1A and 1A protruding from the opposing end surfaces of the lower support members 2C and 2C, and the square steel pipe 1B is pressed against the lower circumference of the bent part r1 by the bolt body 1A4. In addition, the rail members 17 'and 17' are placed between the opposing surfaces of the lower support members 2C and 2C. wear.

  In this way, the transport carriage 40 is advanced on the newly installed lower support member 2C, and the lower support member 2C is supported so as to support the inner peripheral surface of the straight portion r2 of the lining material R together with the lower support member 2C in the same manner as described above. The top end support member 2A and the two side support members 2B and 2B are assembled on top to form the cylindrical straight portion support body 2.

  In the same manner, the work of disassembling the bent portion support body 1 and the straight portion support body 2 on the rearmost side and adding the work to the straight portion support body 2 on the foremost end side by the transport carriage 40 is performed by the shield method. A secondary lining is carried out by filling the filling material 22 such as cement milk between the lining material R and the primary lining S which are carried out sequentially according to the excavation and supported by the bent portion supporting body 1 and the straight portion supporting body 2. I do.

  The filling of the filling material 22 is performed every time a series of pipes of about 6 to 7 m are formed by several support bodies A having a width in the tunnel length direction of about 1.5 m, for example. In this case, since the gap 21 between the cylindrical lining material R ′ supported by the straight portion support body 2 arranged on the foremost end side and the primary lining S is opened forward, The front end of the opening of the gap 21 is closed with padding. Then, an intermediate filling material injection pipe (not shown) is passed through the upper end of the filling to the inside of the gap 21, and the gap 21 between the primary lining S and the cylindrical lining material R ′ from the tunnel through the injection pipe. The inside filling material 22 is filled in, or an optional filling material injection hole is provided at the upper end of the cylindrical lining material R ′, and the straight shape supporting the lining material R ′ An injection pipe is connected to and communicated with the injection hole from the inside of the upper end portion of the part support body 2, and the filling operation of the filling material 24 into the gap 23 is performed through the injection pipe.

  The filling of the filling material 22 is first performed from the bottom of the gap 21 to the lower vicinity of the shaft body portion 3a of the spud 3 attached to the both-side support members 2B, 2B of the straight portion support body 2. When the filling material 22 is cured to some extent, the buoyancy of the filling material 22 with respect to the lining material R due to the hydraulic pressure disappears, so the spud 3 mounted on the both side support members 2B and 2B is attached together with the cylinder 11 After the removal, the spud insertion holes 13 on both sides of the lining material R ′ through which the shaft body portion 3a of the spud 3 has been inserted are closed by the plug as described above. The spud 3 and the cylinder 11 are used again for the support body to be newly assembled.

  After that, the shaft body portion 3a of the spud 3 in which the filling material 22 is mounted on the top end support member 2A of the straight portion support body 2 in the gap 21 between the primary lining S and the lining material R is further provided. After filling up to the height reaching the lower vicinity and removing these spuds 3 together with the cylindrical body 11, the spud insertion hole 13 on the upper end side of the lining material R 'through which the shaft body part 3a of the spud 3 is inserted is formed. In the same manner as described above, the plug is closed with a plug, and then the filling material 22 is fully filled up to the upper end portion of the gap 21.

  In the above embodiment, the primary lining S applied to the tunnel excavation wall surface is covered with the lining material R, and the filling material 22 is filled between the lining material R and the primary lining S. The present invention may be applied to the lining work in which the tunnel excavation wall surface is directly covered with the lining material R without applying the primary lining S, and the filling material 22 is filled between the lining material R and the tunnel excavation wall surface. .

The simplified longitudinal section side view of a tunnel curve part. The longitudinal section front view of a straight part support body (right half part) and a bending part support body (left half part). The simplified perspective view of a top end support member and a both-side support member. The simplified perspective view of a lower support member. The longitudinal cross-sectional front view which shows the detail of the linear part support body part in FIG. The longitudinal section front view of a spud wearing part. The simplified side view of the moving means of a spud mounting plate. The side view of the state which connected between the linear part support bodies which adjoined by the bending part support body. The side view of a bending part support body. The front view. The bottom view. The simplified vertical side view of the state which mutually refracted and connected between the linear part support bodies by the bending part support body. The simplified side view of the state which connected cylindrical lining materials. The simplified side view of a conveyance trolley. The front view in driving | running | working of a conveyance trolley | bogie. The simplified side view of the state which is constructing the lower support member. The front view. The simplified side view of the state which advanced the movable trolley | bogie on a lower support member. The front view. The simplified side view of the state which made the conveyance trolley retract to the support body dismantling position. The simplified side view of the state which has suspended the lower support member.

Explanation of symbols

T Tunnel curve part S Primary lining R Lining material 1 Bending part support body
1A support bracket
1B Square steel pipe 2 Straight section support
2A Ceiling support member
2B Both side support members
2C Lower support member 3 Spad 4 Mounting hole 5 Spad mounting plate
21 Clearance
22 Filling material

Claims (3)

  Covering the excavation wall surface in the tunnel curve section or the primary lining constructed on the excavation wall surface with a synthetic resin lining material, the gap between the excavation wall surface and the lining material or the primary lining material and the lining material A support device for supporting the lining material lined along the tunnel curve portion from the inner surface side when filling the gap between the bent portion, and a bent portion support body for supporting the bent portion of the lining material; And a straight part support body that supports the straight part of the lining material, and the straight part support body has a cylindrical shape by combining a plurality of rectangular support members curved in an arc shape in the circumferential direction of the tunnel. While the support body is configured to form a support body, the bent part support body has a support bracket projecting in the tunnel length direction at small intervals in the circumferential direction on the opposite end surface of the adjacent straight part support body, and the tunnel length Opposite to the direction It is composed of square steel pipes that are removably fixed to the pair of support brackets according to the distance between the opposing end surfaces of the adjacent straight support members interposed between the pair of support brackets. A plurality of these straight-part support bodies and bent-part support bodies are connected in the tunnel length direction so as to support the inner surface of the lining material covered along the tunnel curve section. The lining material support device in the curved curve section.   The straight support member has a lower support member formed by stretching a skin plate on the outer surface of the rectangular frame, and a plurality of connecting members in the rectangular frame without stretching the skin plate on the outer surface of the rectangular frame. The top end supporting member and the both side supporting members that are integrally connected to each other are provided, and a mounting hole for detachably attaching the spud to the top end supporting member and the both side supporting members is provided, and the lining material is provided from the mounting hole. The above-mentioned spat is inserted through the insertion hole provided in the pier, and its tip is brought into contact with and received by the inner peripheral surface of the tunnel excavation wall surface or primary lining, thereby preventing the lining material from floating when filling the filling material. The lining material supporting device in the tunnel curved portion according to claim 1, wherein the lining material supporting device is configured as described above.   The support metal fitting protruding from the opposite end face of the adjacent straight part support body includes a horizontal bottom face plate part supporting the inner surface facing the tunnel at the end part of the square steel pipe, and one side end of the horizontal bottom face plate part. A side plate that refracts at a right angle and receives one side at the end of the square steel tube, and is threaded through the horizontal bottom plate and presses the inner surface of the end of the square steel tube outwardly at its tip. 2. The lining material supporting device in a tunnel curve portion according to claim 1, wherein the lining material supporting device is formed of a bolt body that presses the outer surface of the square steel pipe against the inner peripheral surface of the lining material.

Images