JP4037818B2 - Secondary lining omission type culvert joint - Google Patents

Description

  The present invention relates to a flexible joint used for connection of underdrains such as water and sewage systems, common grooves, and caverns, and more particularly to a joint used for a shielded pipeline that omits a secondary concrete lining.

  As a flexible joint of the shield pipe line constructed by the shield method, flexibility is provided between a pair of joint frames continuous in the circumferential direction of the culvert fixed to the opposing end surfaces of the general segments to be connected. There is a structure in which a water-stopping rubber as a flexible water-stopping member is continuously and watertightly installed in the circumferential direction, and allows relative displacement of a culvert connected by deformation of the water-stopping rubber.

  By the way, secondary lining concrete is usually placed on the inner circumference of underdrains and such joints to prevent water stoppage and corrosion of steel materials. Omitted shield pipes tend to increase.

  When such a secondary lining omission type shield pipe is adopted in a culvert that allows water to pass through, such as a diversion tunnel or rainwater sewage tunnel, the joint has water-stopping and corrosion resistance instead of the secondary lining concrete. It is necessary to have a configuration. As such a thing, there exists a thing like the indication to patent document 1. FIG.

As shown in FIG. 7 which is a cross-sectional view, this is between a pair of joint frames 72 and 72 ′ that are connected to opposite end surfaces of the connected culverts 71 and 71 ′ and that are continuously connected in the circumferential direction of the culvert. A double flexible water stop member 73 having a flexible outer peripheral side water stop member 73A and an inner peripheral side flexible water stop member 73B is constructed in a watertight manner continuously in the circumferential direction. A short cylindrical inner peripheral surface cover rubber 74 forms substantially the same surface as the inner peripheral surface of the underdrains 71 and 71 ′ on the inner peripheral side of the peripheral side flexible water-stopping member 73 </ b> B, and the attachment end portion of each joint frame 72 , 72 'are mounted on the inner main beams 72A, 72A'. Between the joint frames 72, 72 'and the underdrains 71, 71' and between the divided pieces of the joint frames 71, 71 'divided in the circumferential direction, although not shown, the sealing material wraps the divided pieces in an inner and outer double. The end portion of the sealing material is pressure-bonded to the attachment end portions of the flexible water-stop members 73A and 73B, thereby obtaining a high water-stop performance against the internal and external water pressure. Inside the joint frames 72 and 72 ′, filling concrete 74 and 74 ′ is filled and placed so that the inner peripheral surface thereof is continuous with the inner peripheral surfaces of the underdrains 71 and 71 ′.
Japanese Patent Publication No. 2003-184491

  However, in the joint having the above-described configuration, the inside-filled concrete filled in the joint frame is exposed to the inside of the culvert, so there is a risk of wear due to water flow or water intrusion after use. In addition, it is necessary to place the formwork along the inner peripheral surface for placing concrete-filled concrete, and there is a problem that installation and removal of the formwork takes time and construction costs are required. .

  The present invention has been made in view of the above problems, and can prevent wear of the filling material filled in the joint frame body and intrusion of water from the part, and work for filling the filling material It is an object of the present invention to provide a secondary lining omission type culvert joint with good properties.

The joint of the second lining omission type culvert of the invention according to claim 1 that achieves the above object is provided between a pair of joint frame bodies that are continuous to the circumferential direction of the culvert fixed to the opposite end faces of the culvert to be connected. In the joint in which the flexible waterproofing members arranged in the inner and outer doubles are continuously watertightly constructed in the circumferential direction, and the relative displacement of the culvert connected by the deformation of the flexible waterproofing member is allowed.
An inner peripheral cover member formed of an elastic material is provided so as to cover the inner periphery of the joint on substantially the same surface as the inner peripheral surface of the connection culvert, and the joint frame body has an outer periphery of the culvert An outer surface plate that is substantially the same outer diameter in the circumferential direction, and a plate-like outer main girder member that is continuous in the circumferential direction provided at an outer end portion of the outer surface plate orthogonal to the axial direction of the joint, A plate-like inner main girder member continuous in the circumferential direction provided orthogonal to the axial direction of the joint at the inner end of the outer plate, and a plate surface between the outer main girder and the inner main girder. A longitudinal rib member disposed as an axial direction, and is coupled to the undercarriage by the outer main girder member, and the flexible water stop members are opposed to the joint frames respectively mounted in the undercarriage. The inner peripheral cover member is installed between the inner main girders, and both end portions of the inner peripheral cover member are the outer main girders of the joint frames. The inner peripheral side between the inner main girders is closed and fixed to the vertical rib member, and the inner peripheral cover member penetrates from the inner peripheral side and is fastened to the vertical rib member. It is attached to the vertical rib member via a pressing plate member that is continuous in the circumferential direction by a fastening bolt that is screwed into the female screw member, and the inner peripheral cover member has a head of the pressing plate member and the fastening bolt. A housing groove is formed, the housing groove is flattened by filling with a caulking material, and the inner peripheral cover member is an inner flexible water blocking member in the flexible water blocking member, The presser plate member and the inner peripheral cover member are supported so as to expand and contract while maintaining inner surface smoothness by a filling material filled in the frame body after being mounted on the frame body .

According to a second aspect of the present invention, the inner cover member is reinforced with a reinforcing cloth at a site where the inner cover member is attached to the joint frame.

According to a third aspect of the present invention, there is provided a joint of the secondary lining omission type undercarriage, wherein the inner peripheral cover member has a filling material in the joint frame body after the inner peripheral cover member is mounted on the joint frame body. An injection hole for filling and filling is provided.

  According to the first aspect of the present invention, since the inner cover member is provided so as to cover the inner peripheral surface of the joint with substantially the same surface as the inner surface of the culvert, there is no resistance to flowing water even when water is passed, Since it is not directly exposed to water flow, it is possible to prevent wear of filling concrete or the like and water intrusion from the part.

Also, by the inner circumferential cover member is fixed to the vertical rib member, can be mounted over the inner peripheral surface of the joint inner circumferential cover member, there is no water flow resistance even when passing water directly flow to the joint frame Since it does not hit, it is possible to prevent wear of the filling concrete and intrusion of water from the part.

Further, the can be configured on the inner circumferential surface of the inner peripheral cover member smoothly, it is possible to reduce the water flow resistance, it is possible to prevent snagging dust.

According to the second aspect of the present invention, since the mounting portion of the inner peripheral cover member to the joint frame is reinforced by the reinforcing cloth, the mounting portion is not deformed even during relative displacement of the culvert. Continuity with the inner surface can be maintained.

According to the third aspect of the present invention, after the inner peripheral cover member is attached, mortar or the like can be injected through the injection hole to form an intermediate filler such as intermediate concrete. At this time, since the inner peripheral cover member functions as a mold, work such as installation / removal of the mold is not required, construction workability is extremely good, and construction cost can be reduced.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view showing a configuration example of a joint of a secondary lining omission type culvert according to the present invention, which corresponds to a cross-sectional view taken along line AA of the culvert constructed by the shield method shown in FIG. To do.

  The underdrains 2 and 2 'connected by the joint 1 are underdrains having a circular cross-section constructed by the shield method. The tunnels are formed by assembling segments 2A and 2A' such as steel segments, concrete segments, and ductile segments into a cylindrical shape. It is constructed by lining the inner surface. A joint portion by the joint 1 is covered with a cover plate 40.

  The joint 1 is a flexible stopper in which joint frames 10, 10 'as a pair of left and right symmetrical joint frames fixed to opposite end surfaces of the respective culverts 2, 2' to be coupled are arranged in double inside and outside. The water stop rubber 20 (outer water stop rubber 21 and inner water stop rubber 22) as a water member and an inner peripheral surface cover rubber 30 as an inner peripheral cover member are watertightly connected. It is configured to allow relative displacement of the underdrains 2, 2 'connected by elastic deformation of the face cover rubber 30. The shapes of the left and right joint frames 10 and 10 'are symmetric. Hereinafter, one joint frame 10 side will be described, and the other joint frame 10' side will be described with a number attached with a dash ('). Is omitted.

  The joint frame 10 has an outer main girder 12 as an outer main girder member and an inner main girder member as an inner main girder member on an inner surface of a skin plate 11 as a plate-like outer surface plate having a predetermined width bent with the same curvature as the outer surface of the underdrain 2. The inner main girders 13 are welded and fixed at predetermined intervals in the axial direction of the undercarriage 2, and the longitudinal ribs 14 as the longitudinal rib members are circumferentially arranged with the plate surface therebetween as the axial direction and radial direction of the undercarriage 2. Are arranged at predetermined intervals. In the space between the outer main girder 12 and the inner main girder 13, a filling concrete 17 as a filling material is filled.

  The outer main girder 12 is welded and fixed to the outer end of the skin plate 11 (the end on the side of the culvert 2) so that the plate surface is perpendicular to the axial direction of the culvert 2. The end is welded and fixed in parallel with the outer main girder 12. The height of the outer main girder 12 and the inner main girder 13 (the radial width) is set equal to the height of the segment 2A, and the inner end of the skin plate 11 has a predetermined length from the inner main girder 13 to the opposite side. It is overhanging.

  The vertical rib 14 has an outer peripheral edge spaced apart from the inner surface of the skin plate 11 at a predetermined interval, and an inner peripheral edge is provided by retracting a predetermined amount from the inner peripheral edge of the outer main girder 12 and the inner main girder 13 to the outer peripheral side. It has been. A mounting nut 14A as a fastening female screw member to which the inner peripheral surface cover rubber 30 is fastened is welded and fixed to the inner peripheral edge with the axial direction as the radial direction.

  The joint frame 10 as described above is fixed to the undercarriage 2 by the outer main girder 12 being fastened to the segment 2A constituting the undercarriage 2 by the inter-ring bolt 3.

  Here, the joint frames 10 and 10 'are configured as so-called flexible segments divided into a plurality of pieces (circumferentially divided pieces) in the circumferential direction, like the segments 2A and 2A', and a plurality of the joint frames 10 and 10 'are connected in the circumferential direction. Thus, it becomes an annular shape corresponding to the underdrains 2, 2 '. As shown in FIG. 3 which is a cross-sectional view of the part, the end portion in the circumferential direction of the circumferentially divided piece is a joint plate 15 so as to close a region surrounded by the skin plate 11, the outer main girder 12, and the inner main girder 13. Is provided, and the circumferentially divided pieces are connected by fastening the joint plate 15 of the adjacent circumferentially divided pieces with the joint bolt 4.

  The outer main girder 12 and the joint plate 15 are formed with continuous seal grooves 16A and 16B in the vicinity of the inner and outer peripheries, respectively, and seal materials 5A and 5B made of water-expanded rubber are disposed in the seal grooves 16A and 16B. The inner ends of the sealing materials 5A and 5B are set so as to protrude slightly inward from the inner surface of the inner main beam 13.

  Between the inner main beams 13 and 13 'of the joint frames 10 and 10' fixed to the underdrains 2 and 2 'respectively, there is a predetermined interval, and a water stop rubber 20 (an outer water stop rubber 21 and an inner water stop A rubber 22) is disposed, and an inner peripheral surface cover rubber 30 is disposed on the inner side thereof so as to cover substantially the entire inner periphery of the joint frame 10, 10 '. Further, a cushioning material 51 made of foamed rubber is interposed between the front edges of the skin plates 11 and 11 ', and a cover plate is interposed between the skin plates 11 and 11' on the outer peripheral surface thereof. 40 is welded to one of the skin plates 11 and 11 '.

  The outer water-stopping rubber 21 is formed of an elastic material such as chloroprene rubber with a bent portion 21A having a V-shaped cross section at the center and mounting portions 21B and 21B extending at right angles to the inner peripheral side at both ends. And are fastened to the inner main girders 13 and 13 ′ by the mounting bolts 24 and 24 at predetermined intervals in the circumferential direction via the presser fittings 23 and 23 that are long in the circumferential direction at the attachment portions 21 B and 21 B at both ends, 11 and 11 'are provided adjacent to the inner peripheral side. The attachment portions 21B and 21B are pressed and pressure-bonded to the end portions protruding from the inner main beams 13 and 13 'of the sealing material 5A disposed in the seal groove 16A so that the water can be stopped against the external water pressure. It has become.

  The inner water stop rubber 22 is provided with a bent portion 22A having an inverted V-shaped cross section at the center and an attachment portion 22B, 22B extending at right angles to the outer peripheral side at both ends by an elastic material such as chloroprene rubber, like the outer water stop rubber 21. And are fastened by mounting bolts 26 at predetermined intervals in the circumferential direction to the inner main girders 13 and 13 ′ via the long metal fittings 25 in the circumferential direction at the mounting portions 22 B and 22 B at both ends. The inner circumference is provided so as to coincide with the inner circumference of the inner main girder 13. A joint material 52 made of foam rubber is fitted into the bent portion 22A so that the inner peripheral side is flush. The attachment portions 22B and 22B are pressed and pressure-bonded to the end portions protruding from the inner main girders 13 and 13 'of the sealing material 5B disposed in the seal groove 16B so that the water can be stopped against the internal water pressure. It has become.

  The inner peripheral surface cover rubber 30 is made of elastic material having high wear resistance such as chloroprene rubber, EPDM, natural rubber, etc., as shown in a sectional view in FIG. And is formed in a plate shape that can cover substantially the entire inner peripheral surface of the joint 1.

  The stretchable portion 30A has an inner peripheral surface set to a thickness that coincides with the inner peripheral surfaces of the underdrains 2 and 2 'at the time of mounting, and the mounting portion 30B is thicker on the side where the outer diameter becomes larger and is reinforced with synthetic resin fibers on the outer peripheral side. The cloth 30C is affixed and reinforced, and a mounting groove 30D as an accommodation groove having a predetermined depth is provided on the inner peripheral side of the mounting portion (a position corresponding to the mounting nut 14A fixed to the vertical rib 14) to the joint frame 10. And an injection hole 30E is formed therethrough. Then, as shown in FIG. 5 which is an enlarged view of the part, a pressing member which is continuous in the circumferential direction by a mounting bolt 31 as a fastening bolt that penetrates from the inner peripheral side of the mounting groove 30D and is screwed into the mounting nut 14A. It is fixed to the joint frames 10 and 10 'via a pressing plate 32 as a plate member. The outer peripheral surface of the telescopic portion 31 is in contact with the inner peripheral surface of the inner main girder 13 and the inner peripheral surface of the inner peripheral surface cover rubber 30, and the outer peripheral surface of the mounting portion 30B is in contact with the inner peripheral side end surface of the mounting nut 14A. The surface coincides with the inner peripheral surface of the underdrains 2, 2 '. The head of the mounting bolt 31 is accommodated in the mounting groove 30D, and the remaining space of the mounting groove 30D and the gap between the side edge of the inner peripheral surface cover rubber 30 and the underdrains 2, 2 'are filled with the caulking material 53. Has been flattened. The injection holes 30E have a predetermined diameter and are formed at predetermined intervals in the circumferential direction. After the inner peripheral surface cover rubber 30 is mounted on the joint frames 10, 10 ', mortar for forming the filling concrete 17 is injected therefrom. These are blocked by foamed rubber or resin after injection.

  The construction of the joint 1 is performed in a state in which the left and right joint frames 10 and 10 'are coupled to each other by the outer water blocking rubber 21 and the thrust receiving member 60, as shown in a sectional view in FIG. The thrust receiving member 60 is interposed at the mounting portion of the inner water blocking rubber 22, and the thrust acting on the excavation is received by the thrust receiving member 60 to maintain the distance between the joint frames 10, 10 '. Then, after the excavation is completed, the thrust receiving member 60 is removed, the inner water stop rubber 22 and the inner peripheral surface cover rubber 30 are attached, and further, the mortar of the mortar through the mortar injection hole 30E of the inner peripheral surface cover rubber 30 is installed. Filled concrete 17 is formed by pouring, and the above-described installation state is obtained.

  In the joint 1 configured as described above, the bent portions 21A and 22A of the double water-stopping rubber 20 (the outer water-stopping rubber 21 and the inner water-stopping rubber 22) and the expansion and contraction portions of the inner peripheral surface cover rubber 30 are provided. The elastic deformation of 31 allows the relative displacement of the underdrains 2 and 2 'while maintaining the water tightness inside and outside.

  Since the inner peripheral surface cover rubber 30 covers the inner peripheral surface of the joint 1 on the same surface as the inner surfaces of the underdrains 2 and 2 ', there is no resistance to running water even when water is passed through. Since the water flow does not directly hit the stuffed concrete 17, wear of the stuffed concrete 17 and intrusion of water from the relevant part can be prevented. Further, by forming the filling concrete 17 after the inner peripheral surface cover rubber 30 is mounted, the inner peripheral surface cover rubber 30 can function as a mold, and work such as installation / removal of the mold becomes unnecessary. Therefore, workability is good.

It is sectional drawing of the joint part of a culvert which shows one structural example of the joint of the secondary lining omission type culvert concerning this invention. It is an external appearance perspective view of the culvert connected by a joint. It is sectional drawing of the circumferential direction connection part of a joint frame. It is sectional drawing of an inner peripheral surface cover rubber. It is an expanded sectional view of the attachment part of inner peripheral surface cover rubber. It is sectional drawing at the time of joint construction. It is sectional drawing of the coupling as a prior art example.

Explanation of symbols

1 Joint 2, 2 'Underdrain 10 Joint frame (joint frame)
11 Skin plate (outer plate)
12 Outer main girder (outer main girder member)
13 Inner main girder (Inner main girder member)
14 Vertical rib (vertical rib member)
14A Mounting nut (fastening female screw member)
17 Filled concrete (filled material)
20 Water stop rubber (flexible water stop member)
21 Outer water stop rubber (flexible water stop member)
22 Inner water stop rubber (flexible water stop member)
30 Inner peripheral cover rubber (inner peripheral cover member)
30B Mounting part 30C Reinforcement cloth 30D Mounting groove (accommodating groove)
30E Injection hole 31 Mounting bolt (fastening bolt)
32 Presser plate (presser plate member)
53 Caulking material

Claims (3)

Between a pair of joint frames continuous in the circumferential direction of the culvert fixed to the opposing end surfaces of the culverts to be connected , flexible water-stopping members disposed in the inner and outer double are continuously watertight in the circumferential direction. In the joint that allows the relative displacement of the culvert connected by the deformation of the flexible water blocking member,
An inner peripheral cover member formed of an elastic material is provided so as to cover the inner periphery of the joint on substantially the same surface as the inner peripheral surface of the connection culvert, and the joint frame body has an outer periphery of the culvert An outer surface plate that is substantially the same outer diameter in the circumferential direction, and a plate-like outer main girder member that is continuous in the circumferential direction provided at an outer end portion of the outer surface plate orthogonal to the axial direction of the joint, A plate-like inner main girder member continuous in the circumferential direction provided orthogonal to the axial direction of the joint at the inner end of the outer plate, and a plate surface between the outer main girder and the inner main girder. A longitudinal rib member disposed as an axial direction, and is coupled to the undercarriage by the outer main girder member, and the flexible water stop members are opposed to the joint frames respectively mounted in the undercarriage. The inner peripheral cover member is installed between the inner main girders, and both end portions of the inner peripheral cover member are the outer main girders of the joint frames. The inner peripheral side between the inner main girders is closed and fixed to the vertical rib member, and the inner peripheral cover member penetrates from the inner peripheral side and is fastened to the vertical rib member. It is attached to the vertical rib member via a pressing plate member that is continuous in the circumferential direction by a fastening bolt that is screwed into the female screw member, and the inner peripheral cover member has a head of the pressing plate member and the fastening bolt. A housing groove is formed, the housing groove is flattened by filling with a caulking material, and the inner peripheral cover member is an inner flexible water blocking member in the flexible water blocking member, A secondary cover characterized in that the presser plate member and the inner peripheral cover member are stretchably supported while retaining inner surface smoothness by a filling material filled in the frame body after being attached to the frame body. An abbreviated type culvert joint. The inner peripheral cover member, the secondary lining shorthand culvert joint according to claim 1, wherein the attachment site to the joint frame member is reinforced by a reinforcing cloth. The aforementioned inner cover member, according to claim 1 or, characterized in that the injection holes for filling construction medium packed material to the joint frame body after attachment to the joint frame body of the inner cover member is provided 2
The secondary lining omission type culvert joint described in 1.

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