JP3537415B2 - Underdrain culvert fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint used for connecting culverts such as water and sewage systems, common ditches, and culverts, and more particularly to a joint suitable for use as a flexible joint of a shielded conduit without secondary concrete lining. Related to culvert joints.

[0002]

2. Description of the Related Art As a flexible joint of a shielded conduit constructed by a conventional shield method, a pair of joint frames continuous in the circumferential direction of a culvert fixed respectively to opposed end faces of a general segment which is a culvert to be connected. Between them, a waterproof rubber as a flexible waterproofing member is continuously provided in the circumferential direction in a watertight manner, and the relative displacement of the culvert connected by deformation of the flexible waterproofing member is allowed. Flexible joints have been used. The joint frame is composed of divided pieces divided into a plurality in the circumferential direction, and each divided piece has a plate-shaped inner main girder and an outer main girder whose longitudinal direction extends in the circumferential direction and width direction extends in the radial direction. An outer peripheral plate connecting the inner main girder and the outer main girder at the outer peripheral edge, and a pair of piece-to-piece joint plates connecting the inner main girder and the outer main girder on both side ends, which are adjacent in the circumferential direction of the divided pieces. The joint frames between the pieces are connected to each other to form a joint frame. Secondary lining concrete will be cast on the inner circumference of culverts and joints to prevent water stoppage and corrosion of steel.

[0003]

Recently, the shield line has
Pipelines that omit secondary lining concrete are increasing to reduce costs. This secondary lining omission type shield pipeline,
Initially, there were many pipes that do not allow water to flow through pipes such as common ditches. Recently, however, they have been increasingly used in culverts that allow water to flow through pipes such as water conduction tunnels and rainwater sewage tunnels.

[0004] Therefore, when the secondary lining concrete is omitted in the conduit through which water passes through the conduit, it is necessary to adopt a structure having waterproofness and corrosion resistance in place of the secondary lining concrete in the joint of the culvert. There is. In particular, in order to allow water to pass through the pipeline, the water stoppage between the joint and the culvert must be carefully controlled not only for the external water pressure but also for the internal water pressure. In addition, since the secondary lining concrete is omitted, if the inner peripheral surface of the joint is concavely recessed with respect to the inner peripheral surface of the culvert, the water flow will be disturbed, the flowing water resistance will increase, and the problem that floating matter will be caught will occur So we have to deal with this problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a watertightness against both internal and external water pressures in a joint of a culvert with no secondary lining, and has corrosion resistance. It is an object of the present invention to provide a novel culvert joint having excellent inner surface flatness.

[0006]

In order to achieve the above object, a joint of a culvert with no secondary lining according to the present invention is provided with a pair of culverts continuous in the circumferential direction of a culvert which are respectively fixed to opposing end faces of a culvert to be connected. A joint in which a flexible water blocking member having flexibility is continuously installed in the circumferential direction in a watertight manner between the joint frames, and a relative displacement of the culvert connected by deformation of the flexible water blocking member is allowed. The joint frame body is composed of divided pieces each divided into a plurality in the circumferential direction, and each divided piece has a plate-shaped inner main girder whose longitudinal direction extends in the circumferential direction and whose width direction extends in the radial direction. And an outer main girder, an outer peripheral plate connecting the inner main girder and the outer main girder at an outer peripheral edge, and a pair of inter-piece joint plates connecting the inner main girder and the outer main girder at both ends, The inter-piece joint plates adjacent to each other in the circumferential direction of the divided pieces are connected to each other and connected to each other. In a joint forming a frame, a seal groove extending in a circumferential direction coinciding with a seal groove formed in a circumferential direction on an end face of an underdrain connected to an inner peripheral side and an outer peripheral side of an outer surface of the outer main girder, respectively. A seal groove extending substantially in the axial direction of the joint is formed continuously on the inner peripheral side and outer peripheral side of the joint plate between the two pieces with the seal groove of the outer main girder. The flexible water-stopping member comprises an inner peripheral-side flexible water-stopper and an outer peripheral-side flexible water-stopper, and the inner peripheral-side flexible water-stopper has an attachment end at each joint. The frame is attached to the inner main girder so as to be pressed against the inner end of a seal member disposed in the inner peripheral seal groove of the piece-to-piece joint plate, and the outer peripheral flexible water blocking member is The mounting end is pressure-bonded to the inner end of the seal material arranged in the outer peripheral side seal groove of the inter-piece joint plate of each joint frame. And it is characterized in that it is attached to the inner main beam in the manner.

According to the present invention, seal grooves extending in the circumferential direction are formed on the inner peripheral side and the outer peripheral side of the outer surface of the outer main girder so as to match the seal grooves on the end face of the culvert. Seal grooves extending substantially in the axial direction of the joint are formed on the inner peripheral side and the outer peripheral side so as to be continuous with the seal grooves on the outer main girder. Is composed of an inner peripheral side flexible water blocking member and an outer peripheral side flexible water blocking member, and the inner peripheral side flexible water blocking member has a mounting end disposed in an inner peripheral side sealing groove of the inter-piece joint plate. Is attached to the inner main girder so as to be pressed against the inner end of the seal member, and the outer end of the outer flexible water blocking member has an end attached to the inner end of the seal member disposed in the outer seal groove of the inter-piece joint plate. It is attached to the inner main girder so as to be crimped on the inner circumference of the inter-piece joint plate against internal water pressure. The same water-stopping effect as the one in which the sealing material and the inner peripheral side flexible water-stopping member arranged in the seal groove are continuously integrated is obtained. The same water stopping effect as that in which the arranged sealing material and the outer peripheral side flexible water stopping member are integrally connected is obtained, and complete water stopping can be secured against the internal and external water pressures.

In one aspect of the present invention, a cap nut is fixed to an outer surface of the inner main girder so as to cover a bolt hole for attaching a flexible water blocking member on an outer peripheral side of the inner main girder of the joint frame. At the same time, a cap nut is fixed to the inner surface of the outer main girder so as to cover a bolt hole for an inter-ring bolt for fixing the outer main girder to the end face of the culvert. It is characterized in that concrete is previously poured into a space in the frame formed between the girder and the outer peripheral plate in a factory.

According to this aspect, the concrete in the space in the frame body is cast, whereby the inner peripheral surface of the frame body can be made smooth, and the corrosion of the steel material constituting the frame body can be prevented. In addition, since concrete has been cast in the factory in advance, the on-site construction of the joint is easy. Further, a cap nut that covers the surface of the bolt hole for attaching the outer peripheral side flexible water blocking member and the bolt hole for the bolt between the rings was fixed, and the outer peripheral side flexible water blocking member and the joint were attached to the culvert by casting concrete. By performing the operation outside the space inside the frame, the number of places where it is difficult to fill the concrete is reduced, and the construction is facilitated.

[0010] In another aspect of the present invention, the concrete to be filled into the space in the frame is formed by removing the box from the vicinity of the inner peripheral side flexible water blocking member mounting position to the inner peripheral side near the inner main girder. The outer peripheral side flexible water blocking member is attached to the inner main girder by a mounting bolt screwed to the cap nut via a pressing plate mounted on the inner side in the axial direction. A bolt is welded and fixed to the inner surface of the presser plate mounted on the inner side of the inner peripheral side flexible water blocking member in the axial direction, and the inner peripheral side flexible water blocking member is fixed to the inside of the inner main girder. It is characterized in that it is inserted into the gap with the holding plate from the inner peripheral surface side and attached to the inner main girder by a nut screwed to the bolt on the outer side of the inner main girder.

The boxed space in the concrete cast into the space in the frame is used for fastening a thrust receiving member mounting space and an inner peripheral flexible water blocking member with a nut when constructing a culvert by a shield method. Useful as a space. In addition, since the bolt is welded and fixed to the holding plate, the inner peripheral side flexible water blocking member can be easily mounted by the mounting nut.

In another aspect of the present invention, the inner peripheral side of the inner peripheral side flexible water blocking member has a surface substantially flush with the inner peripheral surface of a culvert to which a short cylindrical inner peripheral surface cover rubber is connected. The piece-to-piece joint plate is formed and mounted such that its mounting end is disposed between the inner main girder of each joint frame and the mounting end of the inner peripheral side flexible water blocking member. It is characterized in that it is pressure-bonded to the inner end of the sealing material arranged in the inner peripheral side sealing groove.

According to this aspect, since the inner peripheral surface cover rubber is attached so as to form substantially the same surface as the inner peripheral surface of the culvert, the inner peripheral surface of the joint is substantially flush with the inner peripheral surface of the culvert,
Flatness is ensured, and it is possible to prevent the generation of water flow resistance and the catch of suspended matter.

In another aspect of the present invention, the inner peripheral surface of the inner main girder is located on the outer peripheral side by a predetermined distance from the inner peripheral surface of the culvert, and the inner peripheral surface of the inner main girder is attached to the inside of the frame. An inner-peripheral flexible water-stopping member mounting plate is welded and fixed so as to protrude into the space, and the mounting plate is provided so as to cover a bolt hole for mounting the inner-peripheral-side flexible water-stopping member of the mounting plate. A cap nut is fixed to the outer peripheral surface of the container, and a space filled out of the mounting plate on the inner peripheral side is formed in the concrete to be filled in the space in the frame. The mounting end of the inner peripheral side flexible water blocking member is attached via a plate by a mounting bolt screwed to the cap nut, and the inner peripheral side flexible water blocking member is an outer peripheral surface of the mounting end. Characterized in that it is pressure-bonded to the inner end of a sealing material arranged in the inner peripheral side sealing groove of the inter-piece joint plate. That.

According to this aspect, after the thrust receiving member is removed, the mounting operation can be easily performed by inserting the mounting bolt for the inner peripheral side flexible water blocking member. Further, since the inner peripheral side flexible water blocking member is pressed against the inner end of the inner peripheral side sealing material at a portion protruding into the space in the frame body, it is easy to achieve sealing.
Further, since the inner peripheral surface of the inner main girder is located on the outer peripheral side of the inner peripheral surface of the culvert, it is possible to perform caulking on the holding plate and the mounting bolt portion with a sufficient thickness.

According to another aspect of the present invention, an inner peripheral surface of the inner peripheral flexible water blocking member is substantially flush with an inner peripheral surface of a culvert to which a short cylindrical inner peripheral cover rubber is connected. And is attached such that its mounting end is disposed between the holding plate and the mounting end of the inner peripheral side flexible water blocking member.

According to this aspect, since the inner peripheral surface cover rubber is mounted so as to form substantially the same surface as the inner peripheral surface of the culvert, the inner peripheral surface of the joint is substantially flush with the inner peripheral surface of the culvert,
Flatness is ensured, and it is possible to prevent the generation of water flow resistance and the catch of suspended matter.

According to another aspect of the present invention, the inner peripheral surface of the inner main girder is located on the outer peripheral side by a predetermined distance from the inner peripheral surface of the culvert, and the inner peripheral side end of the inner main girder is An inner peripheral side flexible water blocking member mounting plate is welded and fixed so as to protrude inward in the axial direction from the inner main girder, and the inner peripheral surface of the mounting plate is fixed to the inner peripheral surface of the mounting plate by a mounting bolt via a holding member. The attachment end of the inner peripheral side flexible water blocking member is attached, and the inter-piece joint plate projects axially inward from the inner main girder at a portion where the inner peripheral side seal groove is formed. The peripheral-side flexible water-stopping member is characterized in that the outer peripheral surface of the mounting end thereof is pressure-bonded to the inner end of a seal member disposed in the inner peripheral-side seal groove of the inter-piece joint plate.

According to this aspect, since the inner peripheral side flexible water blocking member mounting plate is fixed by welding so as to protrude inward in the axial direction from the inner main girder, the space inside the frame body is hardly filled with concrete. And the width of the load applied to the inner-peripheral-side flexible water-stopping member is reduced, and it is possible to cope with a higher internal water pressure. Further, the piece-to-piece joint plate projects axially inward from the inner main girder at a portion where the inner circumferential seal groove is formed, and the inner circumferential flexible water blocking member has an inner circumferential surface at an outer circumferential surface of the mounting end thereof. Since it is pressure-bonded to the inner end of the sealing material disposed in the side sealing groove, it is easy to achieve sealing.

In another aspect of the present invention, the inner peripheral side of the inner peripheral side flexible water blocking member has a surface substantially flush with the inner peripheral surface of a culvert to which a short cylindrical inner peripheral surface cover rubber is connected. It is characterized in that it is formed and mounted such that its mounting end is disposed between the holding member and the mounting end of the inner peripheral side flexible water blocking member. With this configuration, flatness of the joint can be ensured.

In one embodiment of this configuration, the holding member has bolt mounting recesses formed on the inner peripheral surface thereof at predetermined intervals, and the depth of the recess is determined by the top surface of the head of the bolt that is mounted. It is set to be flush with the inner peripheral surface of the culvert. With this configuration, the bolt is received in the holding member, so that the flatness of the joint is more reliably ensured.

According to another aspect of the present invention, a joint member for preventing deformation of the inner peripheral surface cover rubber is disposed between the inner peripheral surface cover rubber and the inner peripheral side flexible water blocking member. It is characterized by having.

With this configuration, deformation of the inner peripheral surface cover rubber due to the internal water pressure is prevented to a certain extent, and the inner peripheral surface cover rubber can maintain a flat surface.

According to another aspect of the present invention, a flexible water stop having flexibility is provided between a pair of circumferentially continuous joint frames of a culvert fixed to opposed end faces of a culvert to be connected. A joint whose members are continuously and circumferentially provided in a watertight manner, and which allow relative displacement of the connected culvert by deformation of the flexible water blocking member, wherein each of the joint frames is provided in a plurality in the circumferential direction. It consists of divided pieces, and each divided piece is
A plate-shaped inner main girder and an outer main girder having a longitudinal direction extending in a circumferential direction and a width direction extending in a radial direction; an outer peripheral plate connecting the inner main girder and the outer main girder at an outer peripheral edge; The joint frame is composed of a pair of piece-to-piece joint plates for connecting the girder and the outer main girder at both ends, and connecting the inter-piece joint plates between adjacent pieces in the circumferential direction of the divided pieces. In the joint, a seal groove extending in the circumferential direction is formed on the inner peripheral side and the outer peripheral side of the outer surface of the outer main girder so as to match the seal groove formed in the circumferential direction on the end face of the culvert to be connected, Seal grooves extending substantially in the axial direction of the joint are formed on the inner peripheral side and the outer peripheral side of the joint plate between the two pieces continuously with the seal grooves of the outer main girder, and a seal material is disposed in each seal groove. In addition, the flexible water-stopping member has a mounting end portion at the outer periphery of the piece-to-piece joint plate of each joint frame. A short cylindrical inner circumferential surface cover rubber is connected to the inner circumferential side of the flexible water blocking member so as to be pressed against the inner end of the seal material disposed in the seal groove. The inner peripheral surface of the culvert to be formed is formed substantially flush with the inner peripheral surface of the culvert, and its mounting end is crimped to the inner end of the sealing material arranged in the inner peripheral sealing groove of the inter-piece joint plate of each joint frame. Thus, the joint of the culvert omitting the secondary lining is provided, which is attached to the attachment member fixed to the inner main girder of each joint frame.

According to this aspect of the present invention, the mounting end of the flexible water blocking member is pressed against the inner end of the sealing member disposed in the outer peripheral sealing groove of the inter-piece joint plate. By being attached to the main girder, the waterproofness against external water pressure is ensured, while the mounting end of the inner peripheral surface cover rubber disposed on the inner peripheral side of the flexible waterproofing member is connected to the inner peripheral surface of the inter-piece joint plate. By being pressed against the inner end of the seal member disposed in the side seal groove, water stoppage against internal water pressure is ensured.

In one embodiment of this configuration, a cap nut is fixed to the outer surface of the inner main girder so as to cover a bolt hole for attaching a flexible water blocking member of the inner main girder of the joint frame, and A cap nut is fixed to the inner surface of the outer main girder so as to cover a bolt hole for an inter-ring bolt for fixing the outer main girder to the end surface of the culvert, and the inner main girder, the outer main girder and the outer girder of the joint frame body. Concrete is cast in a factory in advance in a space inside the frame formed between the outer peripheral plate and the towel.

According to this configuration, the steel in the frame can be prevented from being corroded by casting concrete in the space in the frame. In addition, since concrete has been cast in the factory in advance, the on-site construction of the joint is easy. Further, a cap nut covering the surface of the bolt hole for attaching the flexible water blocking member and the bolt hole for the bolt between the rings is fixed, and the flexible water blocking member and the joint are attached to the underdrain in the space in the concrete frame. By performing it outside, the number of places where it is difficult to fill concrete is reduced, and construction is facilitated.

[0028]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show one embodiment of the present invention. FIG. 1 is an external perspective view of a culvert constructed by a shield method connected by a joint of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. FIG. 3 and FIG. 3 are perspective views showing a frame of the joint.

The culverts 2, 2 'connected by the joint 1 are culverts having a circular cross section constructed by a shield method, and include segments 100, 10 such as steel segments, concrete segments, and ductile segments.
0 'is assembled into a cylindrical shape and lining the inside of the tunnel. The joint by the joint 1 is covered by a cover plate 50.

A pair of joint frames 3, 3 'continuous in the circumferential direction of the culvert are provided with a pair of joint bolts 4, 3 on opposite ends of the segments 100, 100' constituting the culverts 2, 2 'to be connected.
Fixed by 4 '. Between the joint frames 3, 3 ', short tubular flexible water blocking members 5, 6 made of a flexible material such as rubber or synthetic resin are continuously provided in the circumferential direction in a watertight manner. The relative displacement of the culverts 2, 2 'connected by the deformation of the deflected water members 5, 6 is allowed. Joint frame 3,
3 'is composed of divided pieces 7, 7' each divided into a plurality in the circumferential direction. The structure of the joint frames 3 and 3 'is symmetrical. Hereinafter, only one joint frame 3 will be described, and the other joint frame side will be denoted by a number with a dash (') and the description will be omitted. (Note that in the following description, either a component with a dash or a component without a dash may not appear in the drawings). As shown in FIG. 3, each divided piece 7 has a plate-shaped inner main girder 8 and an outer main girder 9 whose longitudinal direction extends in the circumferential direction and whose width direction extends in the radial direction.
And an outer peripheral plate 10 for connecting the inner main girder 8 and the outer main girder 9 at the outer peripheral edge, and a pair of piece-to-piece joint plates 11, 11 for connecting the inner main girder 8 and the outer main girder 9 at both ends. It is. A ring-to-ring bolt hole 9a is formed at a substantially central portion of the outer main girder 9 at a predetermined interval in the circumferential direction, and a pair of right and left joint bolts is formed at a substantially central portion of the inter-piece joint plate 11. A hole 11a is formed. The piece-to-piece joint plate 11 that is adjacent to the divided piece 7 in the circumferential direction is
The joint frame 3 is formed by being interconnected according to FIG. The outer peripheral plate 10 extends from the inner main girder 8 to the inside by a predetermined length to form an overhang portion 10a.
A plurality of (two in the illustrated example) reinforcing longitudinal ribs 52 are provided at predetermined intervals in the middle of the inter-piece joint plates 11, 11.
0, inner main girder 8 and outer main girder 9 are fixed by welding. The cover plate 80 is set so that the outer
Is welded to one of the outer peripheral plates 10 and 10 ′.

The segments 100, 1 'of the culverts 2, 2' connected to the inner and outer peripheral sides of the outer surface of the outer main girder 9, respectively.
Seal grooves 13 and 14 extending in the circumferential direction are formed on the outer peripheral side and the inner peripheral side of the end face of 00 ′ so as to coincide with the seal grooves 2a and 2b and 2′a and 2′b. Seal grooves 15, 16 extending substantially in the axial direction of the joint are formed on the inner peripheral side and the outer peripheral side of the outer surfaces of the inter-joint plates 11, 11 so as to be continuous with the seal grooves 13, 14 of the outer main girder 9. The seal grooves 13, 14, 15, 16 are formed in an inverted trapezoidal cross section as shown in FIG.
And the seal grooves 2a, 2
In the seal grooves 15 and 16 formed by the seal grooves 15 and 16 and the joint pieces 11 between the adjacent pieces, a seal member 17 made of a water-swelling rubber having a trapezoidal cross section as shown in FIG. 5 is disposed. Have been. As the water-swelling rubber, chloroprene rubber, urethane rubber, SBR rubber and the like are preferable. The inner end 17a of the sealing material 17 is
Are arranged in the seal grooves 15 and 16 so as to project slightly inward from the inner surface of the seal.

The inner peripheral side flexible water blocking member 5 is made of chloroprene rubber or the like, and has a bulging portion 5a bulging outward at the center.
Horizontal parts 5b, 5b and horizontal part 5 extending to both sides in the axial direction
b, 5b, the mounting end portion 5 which rises to the outer peripheral side at substantially right angles.
c, 5c, and at the mounting ends 5c, 5c, the inner main beams 8, 8 'are fixed by mounting bolts 30, 30' at predetermined intervals in the circumferential direction via ring-shaped pressing plates 19, 19 '. It is fastened to the peripheral part. The mounting ends 5c, 5c are arranged such that their outer peripheral edges are located slightly outer peripheral than the outer peripheral edges of the inner peripheral seal grooves 15, 15 'of the inter-piece joint plates 11, 11'. .

A culvert 2 to which a short cylindrical inner peripheral surface cover rubber 20 made of rubber having good wear resistance, such as chloroprene rubber, EPDM, or natural rubber, is connected to the inner peripheral side of the inner peripheral side flexible water blocking member 5. 2 ', the surface of which is substantially the same as the inner peripheral surface except for the concrete wear allowance, and whose mounting ends 20a, 20a are connected to the inner surfaces of the inner main girders 8, 8' of each joint frame and to the inner peripheral side flexible stopper. The water member 5 is mounted so as to be sandwiched between the mounting members 5c and the outer surfaces of the mounting members 5c.

By disposing the inner peripheral side flexible water-stopping member 5 and the inner peripheral surface cover rubber 20 in this manner, and by tightening the nuts 18, 18 ′ to the mounting bolts 30, 30 ′, the flexible water-stopper is provided. The mounting end portions 5c, 5c of the member 5 are piece-to-piece joint plates 11,
11 ′ sealing material 17 arranged in the inner peripheral side sealing groove 15
, And the mounting end portions 20a of the inner peripheral surface cover rubber 20 are pressed against the inner end portion 17a of the sealing material 17 disposed in the inner peripheral side sealing groove 15,
Sufficient water stoppage is performed for the internal water pressure.

The outer flexible water blocking member 6 is made of chloroprene rubber or the like, and has a bulging portion 6a bulging inward at the center.
Horizontal parts 6b, 6b and horizontal parts 6 extending on both sides in the axial direction
b, 6b, the mounting end 6 which falls at an almost right angle to the inner peripheral side.
c, 6c, and at the mounting end portions 6c, 6c at predetermined intervals in the circumferential direction via ring-shaped holding plates 22, 22 ', mounting bolts 23, 23' at the outer periphery of the inner main beam 8, 8 '. It is fastened to the side part. The mounting ends 6c, 6c are arranged such that their inner peripheral edges are located slightly inward of the inner peripheral edges of the outer peripheral sealing grooves 16, 16 'of the inter-piece joint plates 11, 11'. ing.

By arranging the outer flexible water-stopping member 6 in this manner and tightening the mounting bolts 23, 23 ', the mounting ends 6c, 6c of the flexible water-stopper 6 are connected to the inter-piece joint plate 1
The inner and outer end portions 17a of the seal member 17 disposed in the outer peripheral side seal grooves 16 of the first and the 11 'are pressure-bonded, and sufficient water stoppage against external water pressure is performed.

In the space between the inner peripheral surface cover rubber 20 and the bulging portion 5a of the inner peripheral side flexible water blocking member 5, the inner peripheral surface cover rubber 2 is provided.
A ring-shaped joint material 24 made of urethane foam or the like for preventing deformation is provided. A ring-shaped buffer plate 25 made of rubber or the like is interposed between the outer peripheral plates 10, 10 'of the joint frames 3, 3', and is adhered to the outer peripheral plates 10, 10 '.

A bag is attached to the outer surface of the inner main girders 8, 8 'so as to cover the bolt holes for attaching the outer flexible water blocking member 6 of the inner main girders 8, 8' of the joint frames 3, 3 '. The nuts 26, 26 'are fixed by means of welding, bonding or the like, and cover the bolt holes for the inter-ring bolts 4, 4' for fixing the outer main girders 9, 9 'to the end faces of the segments 100, 100'. The cap nuts 27, 27 'are fixed to the inner surfaces of the outer main beams 9, 9'. The space 28 in the frame formed between the inner main girder 8, the outer main girder 9, and the outer peripheral plate 10, and the space in the frame formed between the inner main girder 8 ', the outer main girder 9', and the outer peripheral plate 10 '. 28 '
In the factory, concretes 31 and 31 'are previously placed. In this case, the concretes 31 and 31 'are expected to be worn by running water, and the wear allowances 31a and 31'a (broken lines in FIG. 2).
A part on the inner peripheral side from B) is provided. The thickness of the wear allowance is usually about 5 mm to 20 mm. The inner peripheral surface of the worn concrete is the same as the inner peripheral surface of the inner peripheral surface cover rubber 20 and the inner peripheral surface of the segments 100 and 100 'after the concrete is worn.

Concrete 3 is placed in the spaces 28 and 28 'in the frame.
At the time of filling 1, 31 ', a mold is arranged from the vicinity of the mounting position of the inner-peripheral-side flexible water-stopping member 5 to the portion near the inner main girder 8, 8' on the inner-peripheral side. By removing the frame, empty spaces 29 and 29 'are formed. The outer peripheral side flexible water blocking member 6 is attached to the cap nut via a holding plate 22, 22 ′ mounted on the inner side in the axial direction.
Are attached to the inner main girders 8, 8 'by mounting bolts 23, 23' which are screwed to the inner main beams 8, 8 '. On the other hand, bolts 30, 30 'are welded and fixed to the inner surfaces of the holding plates 19, 19' mounted on the inner side of the inner peripheral side flexible water blocking member 5 in the axial direction. Are bolts 3 inserted in the spaces 29, 29 'from which the boxes have been removed and welded and fixed to the holding plates 19, 19'.
It is attached to the inner main beam 8, 8 'by mounting nuts 18, 18' screwed to 0, 30 '. When filling concrete, the inter-piece joint plates 11, 11, 11 ', 1
Formwork is arranged in the vicinity of the inter-piece joint plates 11, 11, 11 ', 11' on the inner peripheral side from the vicinity of the joint bolt holes 11a, 11'a of 1 ', and after filling the concrete 31, 31', the formwork is removed. By forming a space (not shown) from which the box has been removed by removing, the mounting bolts 12, 12 'are inserted from the space where the box has been removed when the divided pieces 7, 7' are connected at the construction site. Thus, the mounting operation can be easily performed.

Next, a method of constructing the joint 1 will be described. First, a plurality of divided pieces 7, 7 'are manufactured in a factory, and the cover plate 80 is welded to the skin plate 10,
After adhering the cushioning material 25 between the 10's and disposing the formwork, the concrete pieces 31 and 31 'are filled, the formwork is removed, and the divided pieces 7, 7' forming the box empty space are put on the construction site. Bring in. Segments 100 and 100 'constituting the culverts 2 and 2' also form a boxless space in the same manner from the vicinity of the bolts 4 and 4 'between the rings to the vicinity of the mounting end on the inner peripheral side, and are filled with concrete at the factory. The segments 100 and 100 'filled with the concrete are transported to the construction site.

At the construction site, divided pieces 7
A thrust receiving member is attached to 7 ', and the divided pieces 7, 7' are assembled in a ring shape while being attached to the segments 100, 100 'of the culverts 2, 2', and the divided pieces 7, 7 are attached by bolts 4, 4 'between the rings. And the segments 100, 100 'are fastened, and the circumferentially adjacent ones of the divided pieces 7, 7' are fastened with the mounting bolts 12, 12 '.

After the propulsion process is sequentially performed, the thrust receiving member is removed, the outer peripheral flexible water blocking member 6 is attached, and then the inner peripheral flexible water blocking member 5 and the inner peripheral surface cover rubber 20 are sequentially attached.

Thereafter, the box empty spaces 29, 29 ′ in the frame internal spaces 28, 28 ′, the box empty space for attaching the bolt for attaching the inter-piece joint plate, and the segments 100, 1
Concrete is filled in the box empty space for mounting the bolt between the rings 00 '.

Finally, the concave portions formed in the outer peripheral frames 9, 9 'of the divided pieces and the inner peripheral surfaces of the fastening portions of the segments 100, 100' and the inner peripheral surfaces of the inner main beams 8, 8 'and the concrete 3
The caulking materials 33, 33 'and 34, 34' are applied between the first and 31 'and the surfaces protruding toward the inner peripheral side to stop water, respectively, and the construction is completed.

FIG. 6 is a partial sectional view similar to FIG. 2 showing another embodiment of the present invention. In the embodiments shown in FIG. 6 and subsequent figures, the same or similar components as those in the embodiments in FIGS. 1 to 5 are denoted by the same reference numerals as those in FIGS. 1 to 5, and detailed description will be omitted.

In the present embodiment, the inner peripheral surfaces of the inner main girders 8 and 8 'are located on the outer peripheral side by a predetermined distance from the inner peripheral surfaces of the culverts 2 and 2'. The space inside the frame 2 on the peripheral surface
Ring-shaped inner peripheral side flexible water blocking member mounting plates 40, 40 'are welded and fixed in such a manner as to protrude axially into 8, 28'. Cap nuts 41, 41 'are fixed to the outer peripheral surfaces of the mounting plates 40, 40' so as to cover the bolt holes for mounting the flexible water blocking members on the inner peripheral side of the mounting plates 40, 40 '. Concrete 31, 3 filled in the spaces 28, 28 'in the frame
1 'is formed with spaces 42, 42' which are boxed out on the inner peripheral side from the mounting plates 40, 40 '. This mounting plate 4
Ring-shaped holding plates 43, 43 'are provided on the inner peripheral surfaces of 0, 40'.
The mounting ends 5c, 5c of the inner peripheral side flexible water blocking member 5 are mounted by mounting bolts 44, 44 'screwed to the cap nuts 41, 41' through the nut. The inner peripheral side flexible water blocking member 5 is provided with rising portions 5d, 5d so as to rise from the horizontal portions 5b, 5b to the outer peripheral side.
c, 5c extend axially outward from the outer peripheral ends of the rising portions 5d, 5d, and extend along the outer peripheral surface thereof.
1, 11 'and 11' are pressure-bonded to the inner circumferential surface of the inner end 17a of the seal member 17 disposed in the inner circumferential seal grooves 15 and 15 '. The inner peripheral side of the flexible water blocking member 5 is substantially flush with the inner peripheral surface of the culverts 2 and 2 'to which a short cylindrical inner peripheral surface cover rubber 45 is connected except for the concrete wear allowance. The mounting ends 45a, 45a are formed so that the holding plates 43, 43 'and the mounting end 5c of the inner peripheral side flexible water blocking member 5,
5c.

The rising portion 5 of the inner peripheral flexible water blocking member 5
d, 5d are mounting bolts 51, 51 'screwed to cap nuts 49, 49' fixed to the outer surface of the inner main girders 8, 8 '.
Ring-shaped pressing plates 48, 4 attached to the inner main beams 8, 8 'via ring-shaped spacers 47, 47'.
8 'presses against the holding plates 43, 43'.

This joint and the joint of each embodiment described below are constructed in the same manner as the joint of the embodiment shown in FIGS. Spaces 42, 4 removed from the box after attaching the inner peripheral side flexible water blocking member 5 and the inner peripheral surface cover rubber 45 of this joint.
2 ′ is subjected to caulking 46, 46 ′.

In this embodiment, the spaces 42, 42 'from which the boxes have been removed serve as spaces for bolting the inner peripheral flexible water blocking member. Further, since the inner peripheral side flexible water blocking member 5 is press-fitted to the inner end portion 17a of the inner peripheral side sealing member 17 at the portions protruding into the spaces 28, 28 'in the frame, it is easy to achieve the seal. Further, since the inner peripheral surfaces of the inner main girders 8, 8 'are located on the outer peripheral side with respect to the inner peripheral surfaces of the culverts 2, 2', it is sufficient when caulking the holding plates 43, 43 'and the mounting bolt portions. It can be done with thickness.

FIG. 7 is a partial sectional view similar to FIG. 2 showing another embodiment of the present invention. In this embodiment, the inner peripheral surfaces of the inner main girders 8, 8 'are located on the outer peripheral side by a predetermined distance from the inner peripheral surfaces of the culverts 2, 2', and the inner peripheral end portions of the inner main girders 8, 8 'are arranged. A ring-shaped inner peripheral side flexible water blocking member mounting plate 60, 60 'is welded and fixed so as to protrude inward in the axial direction from the inner main beams 8, 8'. On the inner peripheral surfaces of the mounting plates 60, 60 ', via the holding members 61, 61', the mounting plates 60, 6 '.
High nuts 82, 82 'with lids welded to the outer peripheral surface of 0'
The mounting ends 5c, 5c of the inner peripheral flexible water blocking member 5 are mounted by mounting bolts 62, 62 'screwed to the inner peripheral side, and the inter-piece joint plates 11, 11, 11', 11 'are mounted on the inner peripheral side. At the portions where the seal grooves 15, 15 'are formed, they protrude axially inward from the inner main girders 8, 8'. The inner peripheral side flexible water blocking member 5 is on the inner peripheral side of the inner end of the sealing material 17 disposed in the inner peripheral side sealing grooves 15, 15 'of the inter-piece joint plate on the outer peripheral surface of the mounting ends 5c, 5c. It is crimped on the surface facing. On the inner peripheral side of the inner peripheral side flexible water blocking member 5, a substantially same surface is formed as the inner peripheral surface of the culverts 2, 2 'to which the short cylindrical inner peripheral surface cover rubber 63 is connected, excluding the concrete wear allowance. The mounting ends 63a, 63a are ring-shaped holding members 61, 61 'and the mounting ends 5c of the inner peripheral flexible water blocking member 5,
5c, so that the joint is flat. Holding member 61, 6
1 ′ has bolt mounting recesses 61a, 61 ′ on its inner peripheral surface.
a are formed at a predetermined interval.
The depth of 1'a is set so that the top surfaces of the heads of the attached bolts 62, 62 'are equal to or less than the inner peripheral surfaces of the culverts 2, 2', and the bolts 62, 62 'are held down. Member 6
The flatness of the joint is more reliably ensured by being accommodated within 1, 61 '. A joint material 64 for preventing deformation of the inner peripheral surface cover rubber 63 is disposed between the inner peripheral surface cover rubber 63 and the inner peripheral side flexible water blocking member 5.
4, deformation of the inner peripheral surface cover rubber 63 due to the internal water pressure is prevented to some extent, and the inner peripheral surface cover rubber 63 can maintain a flat surface.

According to the present embodiment, since the inner peripheral side flexible water blocking member mounting plates 60, 60 'are fixed by welding so as to protrude inward in the axial direction from the inner main girders 8, 8'. The number of places where it is difficult to fill concrete into the body spaces 28, 28 'is reduced, and the width of the load applied to the inner peripheral side flexible water blocking member 5 is reduced, so that it is possible to cope with a higher internal water pressure. Also, the piece-to-piece joint plates 11, 11, 11 ', 1
1 ′ projects axially inward from the inner main girders 8, 8 ′ at portions where the inner peripheral side seal grooves 15, 15 ′ are formed,
The inner peripheral flexible water blocking member 5 is press-fitted to the inner end 17a of the sealing material 17 disposed in the inner peripheral sealing grooves 15, 15 'on the outer peripheral surfaces of the mounting ends 5c, 5c. Is easier to achieve.

FIG. 8 is a partial sectional view similar to FIG. 2 showing another embodiment of the present invention. In the embodiment of FIG.
The outer peripheral side flexible water blocking member 6, which is a single flexible water blocking member, has its mounting ends 6c, 6c having piece-to-piece joint plates 11, 11, 1.
It is attached to the inner main girders 8, 8 'so as to be pressed against the inner end 17a of the sealing material 17 arranged in the outer peripheral side sealing groove 16 of 1', 11 '. On the inner peripheral side of the flexible water-stopping member 6, a short cylindrical inner peripheral surface cover rubber 70 is connected and connected to the inner peripheral surface of the culvert except for the concrete wear allowance. 70a is pressed against the inner end 17a of the seal member 17 disposed in the inner peripheral seal groove 15 of the inter-piece joint plate 11, 11 'of each joint frame body, facing the inner peripheral side. The mounting bolts 7 are attached to the inner peripheral surfaces of the ring-shaped mounting members 71, 71 'fixed to the inner main girders 8, 8' so as to project inward in the axial direction from the inner peripheral surfaces of the beams 8, 8 '.
2, 72 '.

In the space between the flexible water blocking member 6 and the inner peripheral surface cover rubber 70, a ring-shaped joint support member 7 having an L-shaped cross section is provided.
3, 73 'are formed in the inner main girder 8, 8' by jointing material fixing bolts 75, 75 'screwed to cap nuts 74, 74' fixed to the outer surfaces of the inner main girder 8, 8 'in advance. Mounted on the surface. Inner peripheral surface cover rubber 70 and joint material support member 7
A ring-shaped joint member 76 made of urethane foam or the like is sandwiched between 3, 73 '.
Deformation of the inner peripheral surface cover rubber 70 due to the internal water pressure is prevented to some extent, and the inner peripheral surface cover rubber 70 can maintain a flat surface.

Concrete 31, 31 'and mounting bolt 7
2, caulking 77,
77 'is given.

According to this embodiment, the mounting ends 6c, 6c of the flexible water-stopping member 6 are provided in the inner end 17a of the sealing material 17 arranged in the outer peripheral sealing groove 16 of the inter-piece joint plates 11, 11 '. By being attached to the inner main girder so as to be pressure-bonded to the inner main girder, water stoppage against external water pressure is ensured, while the mounting end portions 70a, 70a of the inner peripheral surface cover rubber 70 are in contact with the inter-piece joint plates 11, 11 '. By being pressed against the inner end portion 17a of the seal member 17 arranged in the peripheral seal groove 15, water stoppage against internal water pressure is ensured.

[0056]

As described above, according to the present invention, on the inner peripheral side and the outer peripheral side of the outer surface of the outer main girder, there are formed seal grooves extending in the circumferential direction which coincide with the seal grooves on the end face of the culvert. A seal groove extending substantially in the axial direction of the joint is formed continuously with the seal groove of the outer main girder on the inner peripheral side and the outer peripheral side of the joint plate between the two pieces, and a seal material is disposed in each seal groove. In addition, the flexible water-stopping member is composed of an inner peripheral side flexible water-stopping member and an outer peripheral side flexible water-stopping member. It is attached to the inner main girder so as to be pressed against the inner end of the seal material disposed in the seal groove, and the outer end of the flexible water blocking member is disposed in the outer seal groove of the inter-piece joint plate. Since it is attached to the inner main girder so as to be crimped to the inner end of the sealed material,
With respect to the internal water pressure, the same water-stopping effect as that obtained by integrally sealing the seal member and the inner peripheral-side flexible water-stopping member arranged in the inner peripheral-side seal groove of the inter-piece joint plate is obtained. The same water-stopping effect as that obtained by integrally sealing the sealing material and the outer-side flexible water-stopping member arranged in the outer-side seal groove of the inter-piece joint plate is obtained, Complete water blocking can be ensured. Therefore, even if the secondary lining concrete is omitted, the water stopping performance is not inferior.

According to one aspect of the present invention, by casting concrete in the space in the frame, the inner peripheral surface of the frame can be smoothed, and the corrosion of the steel material constituting the frame can be prevented. Can be. In addition, since concrete has been cast in the factory in advance, the on-site construction of the joint is easy. Further, a cap nut that covers the surface of the bolt hole for attaching the outer peripheral side flexible water blocking member and the bolt hole for the bolt between the rings was fixed, and the outer peripheral side flexible water blocking member and the joint were attached to the culvert by casting concrete. By performing the operation outside the space inside the frame, the number of places where it is difficult to fill the concrete is reduced, and the construction is facilitated.

According to another aspect of the present invention, the boxed space in the concrete poured into the space inside the frame is:
When constructing a culvert by the shield method, it serves as a tightening space after mounting the thrust receiving member, and also serves as a space for mounting work by inserting the mounting nut for the inner peripheral side flexible water blocking member after removing the thrust receiving member . In addition, since the bolt is welded and fixed to the holding plate, the inner peripheral side flexible water blocking member can be easily mounted by the mounting nut.

According to another aspect of the present invention, a short cylindrical inner peripheral surface cover rubber is formed on the inner peripheral side of the inner peripheral side flexible water blocking member so as to be substantially flush with the inner peripheral surface of the culvert. As a result, the inner peripheral surface of the joint is substantially flush with the inner peripheral surface of the culvert, flatness is ensured, and the occurrence of water flow resistance and the prevention of suspended matter can be prevented.

According to another aspect of the present invention, the inner peripheral side flexible water blocking member is pressure-bonded to the inner end of the inner peripheral side sealing material at the portion protruding into the space in the frame, so that the seal can be easily achieved. It is. Further, since the inner peripheral surface of the inner main girder is located on the outer peripheral side of the inner peripheral surface of the culvert, it is possible to perform caulking on the holding plate and the mounting bolt portion with a sufficient thickness.

According to another aspect of the present invention, the inner circumferential side flexible water blocking member mounting plate is welded and fixed so as to protrude inward in the axial direction from the inner main girder. The number of places that are difficult to fill is reduced, and the width of the load applied to the inner peripheral side flexible water blocking member is reduced, so that it is possible to cope with a higher internal water pressure. Further, the piece-to-piece joint plate projects axially inward from the inner main girder at a portion where the inner circumferential seal groove is formed, and the inner circumferential flexible water blocking member has an inner circumferential surface at an outer circumferential surface of the mounting end thereof. Since it is pressure-bonded to the inner end of the sealing material disposed in the side sealing groove, it is easy to achieve sealing.

According to another aspect of the present invention, the mounting end of the flexible water blocking member is pressed against the inner end of the sealing material disposed in the outer peripheral sealing groove of the inter-piece joint plate. By being attached to the inner main girder, the waterproofness against external water pressure is secured, while the mounting end of the inner peripheral surface cover rubber disposed on the inner peripheral side of the flexible waterproofing member is attached to the inner end of the inter-piece joint plate. By being pressed against the inner end of the seal member arranged in the peripheral seal groove, water stoppage against internal water pressure is ensured.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a culvert constructed by a shield method connected by a joint according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view showing a frame of the joint.

FIG. 4 is a diagram showing a cross-sectional shape of a seal groove.

FIG. 5 is a diagram showing a cross-sectional shape of a seal.

FIG. 6 is a partial cross-sectional view showing another embodiment of the present invention.

FIG. 7 is a partial cross-sectional view showing another embodiment of the present invention.

FIG. 8 is a partial sectional view showing still another embodiment of the present invention.

[Explanation of symbols]

1 Fitting 2, 2 'culvert 3, 3 'joint frame 4, 4 'ring bolt 5 Inner circumference flexible water blocking member 6 Outer side flexible water blocking member 7, 7 'split piece Main digit in 8, 8 ' 9, 9 'outer main girder 10 Outer plate 11, 11 'piece joint plate 13, 14, 15, 16 Seal groove 17 Sealing material 20, 70 Inner peripheral surface cover rubber 25 buffer plate 26, 26 ', 27, 27' Cap nut 28, 28 'Frame body space 31, 31 'concrete

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2001-248392 (JP, A) JP-A-2001-317296 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21D 11 / 04

Claims (12)

(57) [Claims] 1. A method according to claim 1, wherein a pair of joint frames, which are respectively fixed to opposed end surfaces of the culvert to be connected and are continuous in the circumferential direction of the culvert,
A joint in which a flexible water blocking member having flexibility is continuously provided in a circumferential direction in a watertight manner, and a relative displacement of the connected underdrain due to deformation of the flexible water blocking member is provided. The frame body is composed of divided pieces divided into a plurality in the circumferential direction, and each divided piece has a plate-like inner main girder and an outer main girder whose longitudinal direction extends in the circumferential direction and width direction extends in the radial direction, An outer peripheral plate connecting the inner main girder and the outer main girder at an outer peripheral edge, and a pair of inter-piece joint plates connecting the inner main girder and the outer main girder on both side ends; In the joint constituting the joint frame body by mutually connecting the inter-piece joint plates adjacent to each other, the inner surface and the outer surface of the outer surface of the outer main girder are connected to the end surface of the culvert. A circumferentially extending seal groove is formed which coincides with the circumferentially formed seal groove. Seal grooves extending substantially in the axial direction of the joint are formed on the inner peripheral side and the outer peripheral side of the inter-piece joint plate continuously with the seal grooves of the outer main girder, and a seal material is disposed in each seal groove. The flexible water-stopping member comprises an inner peripheral-side flexible water-stopping member and an outer peripheral-side flexible water-stopping member, and the inner peripheral-side flexible water-stopping member has a mounting end portion between the pieces of each joint frame. The joint plate is attached to the inner main girder so as to be pressed against the inner end of the seal material arranged in the inner peripheral seal groove, and the outer peripheral flexible water-stopping member has an attachment end that is connected to each joint. The secondary lining is omitted, being attached to the inner main girder so as to be pressed against the inner end of a sealing material arranged in the outer peripheral side sealing groove of the inter-piece joint plate of the frame body. Type culvert joint. 2. A cap nut is fixed to an outer surface of the inner main girder so as to cover a bolt hole for attaching a flexible water blocking member on an outer peripheral side of the inner main girder of the joint frame. A cap nut is fixed to an inner surface of the outer main girder so as to cover a bolt hole for an inter-ring bolt to be fixed to an end surface of the culvert, and the inner main girder, the outer main girder and the outer peripheral plate of the joint frame body are fixed to each other. The joint according to claim 1, wherein concrete is previously cast in a space in the frame body formed therebetween at a factory. 3. The concrete filled in the space in the frame has a box-free space formed in a portion from the vicinity of the inner peripheral side flexible water blocking member mounting position to the inner peripheral side near the inner main girder. The outer peripheral side flexible water blocking member is attached to the inner main girder by an attachment bolt screwed to the cap nut via a holding plate attached inward in the axial direction, and the inner peripheral side flexible water stopping member is provided. A bolt is welded and fixed to the inner surface of the holding plate mounted on the inner side in the axial direction of the water stopping member, and the inner peripheral side flexible water stopping member is provided in a gap between the inside of the inner main girder and the holding plate. The joint according to claim 2, wherein the joint is attached to the inner main girder by a nut inserted from the inner peripheral surface side and screwed to the bolt on the outer side of the inner main girder. 4. An inner peripheral side of the inner peripheral side flexible water blocking member is formed substantially flush with an inner peripheral surface of a culvert to which a short cylindrical inner peripheral surface cover rubber is connected, and a mounting end thereof. Is mounted between the inner main girder of each joint frame and the mounting end of the inner peripheral side flexible water blocking member so that the inner peripheral side seal groove of the inter-piece joint plate is mounted. The joint according to claim 3, wherein the joint is crimped to an inner end of the disposed sealing material. 5. An inner peripheral surface of the inner main girder is located on the outer peripheral side by a predetermined distance from an inner peripheral surface of the culvert, and the inner peripheral surface of the inner main girder is formed to protrude into the space in the frame. An inner peripheral side flexible water blocking member mounting plate is fixedly welded to the mounting plate, and a cap nut is attached to an outer peripheral surface of the mounting plate so as to cover a bolt hole for mounting the inner peripheral side flexible water blocking member of the mounting plate. Is fixed, and the concrete filled in the space in the frame has a boxed space formed on the inner peripheral side from the mounting plate, and the bag is formed on the inner peripheral surface of the mounting plate via a holding plate. A mounting end portion of the inner peripheral side flexible water blocking member is attached by a mounting bolt screwed to a nut, and the inner peripheral side flexible water blocking member is provided on the outer peripheral surface of the mounting end portion of the inter-piece joint plate. 3. The pressure-sensitive adhesive member is press-fitted to an inner end of a seal member disposed in the inner peripheral side seal groove.
The described joint. 6. An inner peripheral surface of the inner peripheral side flexible water blocking member is formed substantially flush with an inner peripheral surface of a culvert to which a short cylindrical inner peripheral surface cover rubber is connected, and has a mounting end thereof. 6. The joint according to claim 5, wherein the joint is mounted so as to be disposed between the holding plate and the attachment end of the inner peripheral side flexible water blocking member. 7. An inner peripheral surface of the inner main girder is located on the outer peripheral side by a predetermined distance from an inner peripheral surface of the culvert, and an inner peripheral end of the inner main girder is axially inward from the inner main girder. An inner-peripheral flexible water-stopping member mounting plate is welded and fixed so as to protrude from the inner peripheral-side flexible water-stopping member. The piece-to-piece joint plate projects axially inward from the inner main girder at the portion where the inner peripheral side sealing groove is formed, and the inner peripheral side flexible water blocking member is 3. The joint according to claim 2, wherein the outer peripheral surface of the mounting end is crimped to an inner end of a seal material disposed in the inner peripheral seal groove of the inter-piece joint plate. 8. An inner peripheral side of the inner peripheral side flexible water blocking member is formed on the inner peripheral side of the culvert to which a short cylindrical inner peripheral surface cover rubber is connected, and has an attachment end thereof. 8. The joint according to claim 7, wherein the joint is attached so as to be disposed between the holding member and the attachment end of the inner peripheral side flexible water blocking member. 9. The holding member has bolt mounting recesses formed on the inner peripheral surface thereof at predetermined intervals, and the depth of the concave portion is such that the top surface of the head of the mounted bolt is in contact with the inner peripheral surface of the culvert. 9. The joint according to claim 8, wherein the joints are set to be on the same plane. 10. A joint member for preventing deformation of the inner peripheral surface cover rubber is disposed between the inner peripheral surface cover rubber and the inner peripheral side flexible water blocking member. The joint according to any one of claims 4, 6, and 8. 11. A flexible water-blocking member having flexibility extends continuously between a pair of circumferentially continuous joint frames of a culvert fixed to opposed end faces of a culvert to be connected. The joint frame is divided into a plurality of pieces divided in the circumferential direction, the joint frames being divided into a plurality of pieces in the circumferential direction. , Each divided piece is a plate-like inner main girder and outer main girder whose longitudinal direction extends in the circumferential direction and width direction extends in the radial direction,
An outer peripheral plate connecting the inner main girder and the outer main girder at an outer peripheral edge, and a pair of piece-to-piece joint plates connecting the inner main girder and the outer main girder on both side ends; In the joint constituting the joint frame body by mutually connecting the inter-piece joint plates adjacent to each other, the inner surface and the outer surface of the outer surface of the outer main girder are connected to the end surface of the culvert. A seal groove extending in the circumferential direction is formed so as to match the seal groove formed in the circumferential direction, and the inner and outer peripheral sides of the joint plate between the two pieces are also connected to the seal grooves of the outer main girder continuously. A seal groove extending substantially in the axial direction is formed, a seal material is disposed in each seal groove, and the mounting end of the flexible water blocking member has an outer peripheral side of the inter-piece joint plate of each joint frame. Attached to the inner main girder so as to be crimped to the inner end of the seal material arranged in the seal groove On the inner peripheral side of the flexible water-stopping member, a substantially cylindrical surface is formed substantially flush with the inner peripheral surface of the culvert to which the short cylindrical inner peripheral surface cover rubber is connected. It is attached to an attachment member fixed to the inner main girder of each joint frame so as to be pressed against an inner end of a seal material arranged in the inner peripheral side seal groove of the inter-piece joint plate. A culvert joint with no secondary lining. 12. A cap nut is fixed to an outer surface of the inner main girder so as to cover a bolt hole for attaching a flexible water blocking member of the inner main girder of the joint frame, and the outer main girder is connected to a culvert. A cap nut is fixed to the inner surface of the outer main girder so as to cover a bolt hole for an inter-ring bolt to be fixed to an end surface, and the inner main girder, the outer main girder and the outer peripheral plate of the joint frame body are fixed. The joint according to claim 11, wherein concrete is previously cast in a space inside the frame formed in the factory at the factory.