JP2013129999A - Construction method of buried joint structure, buried joint structure and buried joint construction metal fitting assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a cut-off function in a relatively small girder joint gap part at a low cost.SOLUTION: In a concrete parapet (breast wall) 110 and a concrete slab 120 positioned freely movably across a girder joint gap part G, concrete on an upper surface near the girder joint gap part G is removed to form a parapet (breast wall) construction hole 111 and a slab construction hole 121, a metal fitting assembly 10 which comprises a frame plate 11, a frame plate 12, a trapezoidal buffer material 32, anchor attaching ribs 13 and height adjusting structures 14 or the like, is inclined and face each other across the girder joint gap part G is arranged, is buried by placing site placed concretes 113, 123, and is then covered with a bituminous sheet 140, an asphalt pavement leveling layer and an asphalt pavement surface layer. Further, a secondary cut-off structure 30 for sealing by filling a seal material from a cloth bag 31 with a rubber sheet into a triangular space between the frame plate 11 and the frame plate 12 is constructed and a buried joint structure 100 is obtained.

Description

  The present invention relates to a construction method of a buried joint structure, a buried joint structure, and a buried joint construction fitting assembly.

As for bridges in service, deterioration and damage of girder ends, bearings and piers due to water leakage from the expansion / contraction device (buried joint) have recently been regarded as a problem.
Especially for small and medium-sized concrete bridges, it is very difficult to check and repair damaged parts because the gap between girders is narrow and no repair equipment is available.

The main cause of the above-described deterioration and damage is water leakage from the expansion device. Measures such as replacing the telescopic device have been taken, but the current situation is that water cannot be completely stopped.
The current buried joint is filled with a sealing material between the bridge girder end and the abutment, and water stoppage is incomplete and water leakage occurs in almost all places. There are two ways to stop this water leakage: (a) changing the structure such as the installation of a mini extension floor slab covering the upper part of the girders and the connection of the floor slab, and (b) changing to a steel product joint.

However, the measure (b) has a technical problem that it is expensive and requires a long construction time.
The measure (b) has a technical problem that a steel product joint, which has never been used before, is installed, and costs are also required.

  In Patent Document 1, a pair of holding plates that expand upward are provided on both side surfaces of a pair of inverted U-shaped top covers that straddle the gap between the bridges of the road bridge. Post-cast concrete is cast as a frame, and a porous drain pipe is embedded along the length of the gap between the bottoms of the mortar-like space between the pair of holding plates. A structure is disclosed in which the change in the gap is absorbed and the permeated water from the roadbed is discharged to the road shoulder through the drain pipe.

  However, the technique of Patent Document 1 has a complicated structure and is similar to the countermeasure (b) described above, and the technical problem described above is still not solved.

JP 2004-244970 A

  The objective of this invention is providing the technique which can implement | achieve the water stop function in a comparatively small girder gap part at low cost.

The first aspect of the present invention is a step of providing an installation space on the upper surface of the end portion sandwiching the beam gap portion in each of the abutment and the bridge,
A step of installing a pair of frame plates that are supported on each side of the abutment and the bridge in the installation space and that are inclined and opposed to each other with the gap between the gaps between them so that the gap on the upper side is narrower than the gap on the lower side When,
Placing concrete in the installation space using the frame plate as a mold;
A step of arranging a first waterproof structure on the surface of the concrete so as to cover the space between the girders;
Forming at least one roadbed layer on the waterproof sheet;
Installing a second waterproof structure in a space between the pair of frame plates;
A method for constructing a buried joint structure including

A second aspect of the present invention is a pair of frame plates that are inclined and faced so that the upper side is narrower than the lower side across the abutment and the beam gap between the bridges,
Post-cast concrete placed on the upper surface of each of the abutment and the bridge as a part of the form plate,
A joint material filled in the gap between the post-cast concrete on each side of the abutment and the bridge;
A first waterproof structure disposed on the post-cast concrete so as to cross the beam gap;
At least one roadbed layer formed on the first waterproof structure;
A second waterproof structure disposed between the pair of frame plates;
An embedded joint structure is provided.

A third aspect of the present invention is a pair of rectangular frame plates that are inclined to face each other so that the distance between the long sides facing each other is substantially parallel,
A pair of rail members arranged in parallel with each other on the opposing surfaces of the pair of frame plates along the long side direction of the frame plate;
A plurality of anchor connection members fixed to the back surface opposite to the opposing surface of each of the frame plates;
An installation height adjusting structure that is fixed to each of the anchor connection members and adjusts the height of the pair of the frame plates relative to the virtual installation surface;
At least one temporary fixing bracket fixed so as to straddle the back of the pair of frame plates;
An embedded joint installation metal fitting assembly is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which can implement | achieve the water stop function in a comparatively small girder gap part at low cost can be provided.

It is the perspective view which fractured | ruptured and illustrated a part of construction part of the embedding joint structure which is one embodiment of this invention. It is sectional drawing (AA part of FIG. 5) which shows an example of the construction part of the embedding joint structure which is one embodiment of this invention. It is sectional drawing (AA part of FIG. 5) which expanded and illustrated the part of the secondary water stop structure of the embedding joint structure which is one embodiment of this invention. It is sectional drawing of connection parts, such as a secondary water stop structure in BB of FIG. It is a top view which shows the structural example of the metal fitting assembly used for construction of the embedded joint structure which is one embodiment of this invention. It is the top view (a part of FIG. 5, the bb direction of FIG. 7) which took out and illustrated the height adjustment structure which is a part of metal fitting assembly of this invention. It is sectional drawing (c-c part of FIG. 6) which took out and illustrated the height adjustment structure which is a part of metal fitting assembly of this invention. It is the top view which took out and illustrated the connection part of the metal fitting assembly of the present invention. It is the side view (BB part of FIG. 8) which took out and illustrated the connection part of the metal fitting assembly of this invention. It is the front view which took out the connection metal fitting of the metal fitting assembly of the present invention, and illustrated it. It is the top view (C section of FIG. 5) which took out and illustrated the temporary fix | stop fitting of the metal fitting assembly of this invention. FIG. 12 is a cross-sectional view (part dd in FIG. 11) of a temporary fixing metal part of the metal fitting assembly of the present invention. It is the front view which took out the temporary fixing metal fitting of the metal fitting assembly of the present invention, and illustrated it. It is sectional drawing which shows the structural example of the fabric bag with a rubber sheet which comprises the embedding joint structure of this invention. It is sectional drawing which shows the road shoulder part of the construction location of the buried joint structure of this invention. It is sectional drawing of the AA part in the road shoulder part of FIG. It is a top view of the BB direction in the road shoulder part of FIG. It is a perspective view which shows the modification of the embedding joint structure which is one embodiment of this invention. It is sectional drawing which shows the modification of the embedding joint structure which is one embodiment of this invention. It is a top view (bb direction of FIG. 21) which takes out and shows the height adjustment structure of the anchor attachment bar of the metal fitting assembly in the modification of an embed | buried joint structure. It is sectional drawing (c-c part of FIG. 20) which takes out and shows the height adjustment structure of the anchor attachment bar of the metal fitting assembly in the modification of an embed | buried joint structure.

  The embedding joint of one aspect of the present embodiment is an embedding in which a cloth back with a secondary water-stopping rubber sheet (hereinafter referred to as a cloth back) is installed in addition to water-stopping with a bitumen sheet that has been applied to an existing embedding joint. It is a buried joint with a double water stop structure.

The cloth bag has a structure that seamlessly crosses between the main lines of the road with a guide installed on a stainless steel formwork and support bracket.
With this structure, it is possible to stop water leakage from the joint connection portion. For example, a novel buried joint having an excellent water stop function can be provided for a super-small gap portion (for example, about 0 mm to 30 mm) among concrete bridges.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view illustrating a part of a construction part of an embedded joint structure according to an embodiment of the present invention, with a part thereof broken.

FIG. 2 is a cross-sectional view showing an example of a construction part of an embedded joint structure according to an embodiment of the present invention.
FIG. 3 is an enlarged cross-sectional view illustrating a portion of the secondary water stop structure of the buried joint structure of the present embodiment, and FIG. 4 is a cross-sectional view of a connection portion of the secondary water stop structure and the like.

  FIG. 5 is a plan view showing a configuration example of a metal fitting assembly used in the construction of the buried joint structure of the present embodiment, and FIG. 6, FIG. 7, FIG. 8, FIG. 9, FIG. 12 and 13 are explanatory views illustrating a part of the bracket assembly taken out.

First, an example of the metal fitting assembly 10 (buried joint construction metal fitting assembly) used in the buried joint structure 100 of the present embodiment will be described with reference to FIG.
In the metal fitting assembly 10 of the present embodiment, the elongated rectangular frame plate 11 and the frame plate 12 have the corresponding long sides on the upper side close to each other, the corresponding long sides on the lower side are spaced apart, and the apex angle (opposing angle) are arranged so as to incline and face each other so as to form two sides of an isosceles triangle of 60 degrees, for example.

  The frame plate 11 and the frame plate 12 that are inclined and opposed to each other include a center set dive 15 (first temporary fixing metal fitting) that is fixed over the back surface thereof, and connection metal fittings 16 that are provided at both ends. The opposing state is fixed by being temporarily fixed by the (second temporary fixing bracket).

  Each of the frame plate 11 and the frame plate 12 is provided with a plurality of anchor mounting ribs arranged at predetermined intervals in the length direction on the back surfaces opposite to each other, and having one end fixed to the back surface by welding or the like. 13 (anchor connecting member) is provided.

As described above, the anchor mounting rib 13 is disposed substantially perpendicular to a plane including the lower sides of the frame plate 11 and the frame plate 12 that are inclined and face each other, that is, a virtual installation surface.
A height adjustment structure 14 (installation height adjustment structure) is provided on the free end side of each anchor mounting rib 13.

FIG. 6 is a plan view of the height adjusting structure, and FIG. 7 is a cross-sectional view of the height adjusting structure.
The height adjustment structure 14 includes a nut mounting rib 14a fixed in parallel to the virtual installation surface with respect to one side surface of the anchor mounting rib 13, a fixing nut 14b fixed to the lower surface of the nut mounting rib 14a, It consists of a height adjustment bolt 14c that is screwed onto the nut 14b from above.

  Then, by rotating the height adjusting bolt 14c and changing the length at which the lower end of the height adjusting bolt 14c protrudes from the fixing nut 14b, each part of the metal fitting assembly 10 with respect to the virtual installation surface and the entire The height can be set / adjusted.

  As illustrated in FIG. 9 and FIG. 12 and the like, a pair of cloth bag support rails 17 having a substantially C-shaped cross section are provided in the longitudinal direction on the opposing surfaces of the frame plate 11 and the frame plate 12, respectively. Are arranged along the length direction of the metal fitting assembly 10 so that the openings 17a formed in a slit shape are parallel to the same height.

  That is, between each of the opposed surfaces of the inclined frame plate 11 and the frame plate 12 and the pair of cloth bag support rails 17, rail fixing ribs 18 having a substantially right triangle shape are arranged on the oblique sides of the frame plate 11 and the frame plate. It is fixed to 12 inclined opposing surfaces, and is arranged so that the vertical side supports the back surface of the cloth bag support rail 17.

  Thereby, the opening parts 17a of the pair of cloth bag support rails 17 are in a state of facing the same height in parallel. Note that the back upper edge of the fabric bag support rail 17 in contact with each of the frame plate 11 and the frame plate 12 may be filled with a caulking material (not shown) made of, for example, a modified silicon material and sealed.

  In addition, the metal fitting assembly 10 according to the present embodiment is arbitrarily arranged in the length direction by the connection metal fittings 16 provided as both temporary fixing metal fittings at both ends in the length direction of the frame plate 11 and the frame plate 12 as described above. It is possible to add as many as.

  That is, as illustrated in FIGS. 8, 9, and 10, the connection fitting 16 has a portal shape, and both feet are welded to the end portions of the frame plate 11 and the frame plate 12 that are inclined to face each other. By being fixed by, etc., it functions as a temporary metal fitting for the frame plate 11 and the frame plate 12.

  Further, the connection fitting 16 is provided with a plurality of bolt holes 16b, and the other-side connection fitting 16 is connected by a connection bolt / nut 16a inserted into the bolt hole 16b, so that an arbitrary number of fitting assemblies can be obtained. Ten frame plates 11, frame plates 12, and cloth bag support rails 17 can be added.

In addition, the upper side part 16c (hatching part of FIG. 9, FIG. 10) of the gate-shaped connection metal fitting 16 is exposed from the surface of the concrete to be laid and is cut out during construction as will be described later.
Similarly, as illustrated in FIGS. 11, 12, 13, and the like, both legs of a portal set jivel 15 are welded to the rear surfaces of the center portions in the length direction of the frame plate 11 and the frame plate 12, respectively. The frame plate 11 and the frame plate 12 are temporarily fixed so that the inclined opposed state is maintained.

The upper side 15a (the hatched portion in FIGS. 12 and 13) of this portal-shaped set jible 15 is exposed from the surface of the concrete to be placed and is cut off during construction as will be described later.
In addition, the trapezoidal cushioning material 32 is press-fitted into the gap between the upper sides of the frame plate 11 and the frame plate 12 that are inclined and opposed to each other. The trapezoidal cushioning material 32 has a structure in which a seal main body portion 32a sandwiched between opposed surfaces of the frame plate 11 and the frame plate 12 and a rib 32b serving as a joint are integrally formed, and the rib 32b is formed vertically upward. It is installed so that the space between the plate 11 and the frame plate 12 protrudes.

In addition, a substantially T-shaped padding member 20 that fits in the girder gap G at the same time is installed in the gap between the upper sides of the frame plate 11 and the frame plate 12 that are inclined to face each other.
The specifications of the metal fitting assembly 10 in the present embodiment are as follows as an example. The frame plate 11, the frame plate 12, the anchor attachment ribs 13 and the like are made of stainless steel having a thickness of 6 mm, for example.

  The height dimension in the vertical direction of the frame plate 11 and the frame plate 12 which are inclined and opposed is, for example, 100 mm, and the facing angle θ is 60 degrees as described above. Urethane primers can be applied to the opposing surfaces of the frame plate 11 and the frame plate 12. The anchor attachment rib 13 has a longest portion of 200 mm.

With reference to FIG. 14, an example of a rubber sheet-attached cloth bag 31 that is attached to the metal fitting assembly 10 of the present embodiment and forms a secondary water stop structure described later will be described.
As illustrated in FIG. 14, the cloth bag 31 with a rubber sheet according to the present embodiment includes a cylindrical mesh part 31 a and a rubber sheet part 31 b each forming a half side surface, and a boundary part between both along the length direction. The rib 31c formed in this way, and the guide protrusion 31d formed along the length direction at both ends of the rib 31c.

The mesh portion 31a is porous and allows liquid to pass therethrough, while the rubber sheet portion 31b is dense and does not allow liquid to pass.
As an example of the manufacturing method of the fabric bag 31 with rubber sheet, a rubber sheet is integrally attached to one surface of a pair of long mesh fabrics having the same width, and then both end portions of both sides are ribbed. It is obtained by sticking together in the length direction with a width of 31c, and integrally forming a protruding guide protrusion 31d with rubber or the like at the end of the rib 31c.

In addition, the diameter of the cylindrical part of the cloth bag 31 with a rubber sheet can be 30 mm, for example.
Next, an example of the embedded joint structure 100 of the present embodiment that is constructed using the metal fitting assembly 10 having the above-described configuration will be described.

  The buried joint structure 100 according to the present embodiment is constructed, for example, on an upper part of a girder gap portion G that is a floating portion of a concrete parapet (breast wall) 110 on the abutment side and a concrete floor slab 120 on the bridge side in a road bridge.

  That is, first, the concrete parapet (chest wall) 110 and the upper concrete of the concrete floor slab 120 that are opposed to each other with the girder gap G interposed therebetween are buried in the buried joint construction width W (one side, W / 2) with the girder gap G interposed therebetween. By removing the joint construction depth H and the construction length L in the construction range in the road width direction, each of the concrete parapet (chest wall) 110 and the concrete floor slab 120 has a substantially rectangular parallelepiped parapet (chest wall) construction hole. 111 (installation space) and floor slab construction hole 121 (installation space) are provided.

In the present embodiment, as an example, the inter-girder gap LG ≦ 30 mm, the buried joint construction width W≈650 mm, and the buried joint construction depth H≈130 mm.
Further, a plurality of concrete anchors 112 and concrete anchors 122 are driven and fixed at predetermined positions on the bottom surfaces of the parapet (chest wall) construction hole 111 and the floor slab construction hole 121.

  Next, the clogging member 20 is installed in the girder gap portion G, and the metal fitting assembly 10 is disposed thereon. At this time, according to the construction length L in the length direction (road width direction) of the girder gap portion G, the metal fitting assembly 10 is appropriately connected and installed by the connection fitting 16.

  In addition, both ends of the metal fitting assembly 10 appropriately added to a desired length are disposed on curb portions (road shoulder portions) at both ends in the width direction of the road, and a pair of cloth bag guides that bend upward gradually from the horizontal direction. The cloth bag support fittings 220 including the rails 221 are respectively connected via the connection fittings 16.

FIGS. 15, 16, and 17 are diagrams illustrating this state. In addition, in FIG. 15, although the one road shoulder part 200 is illustrated, the other road shoulder part 200 which is not illustrated is also the same structure.
As illustrated in FIG. 15 and the like, one end of the road shoulder work space 210 provided in the road shoulder portion 200 is connected to the metal fitting assembly 10 (the embedded joint structure 100) via the connection metal fitting 16, and a multi-end portion is formed. The cloth bag support fitting 220 that is gradually bent upward so as to be in the vertically upward direction is disposed.

  The fabric bag guide rail 221 provided on the fabric bag support bracket 220 is provided with the same shape and the same width as the above-described fabric bag support rail 17 of the bracket assembly 10, and the end of the fabric bag support rail 17 in the connection bracket 16. Is smoothly connected to the portion, and the bent portion of the fabric bag support fitting 220 is also continuous.

  Thereafter, the height adjusting bolt 14c of the height adjusting structure 14 provided at the end of each anchor mounting rib 13 is appropriately operated so that the entire metal fitting assembly 10 is substantially horizontal and the parapet (chest wall) construction hole 111 is formed. And it adjusts so that it may become predetermined height from the bottom face of the floor slab construction hole 121. FIG.

  At this time, the caulking material 20 a is filled and sealed in the gaps between the lower sides of the frame plate 11 and the frame plate 12 and the bottom surfaces of the parapet (chest wall) construction hole 111 and the floor slab construction hole 121. For example, a modified silicon-based material can be used as the caulking material 20a.

  Moreover, as illustrated in FIGS. 1 and 2 and the like, the concrete anchor 112 and the concrete anchor 122 are provided in the reinforcing bar through holes 13a of the anchor mounting ribs 13 of the frame plate 11 and the frame plate 12, respectively. In addition, the reinforcing reinforcing bars 114 and the reinforcing reinforcing bars 124 are arranged so as to be in contact with the girder gap portion G at an outer position.

Further, a trapezoidal cushioning material 32 is press-fitted into the gap between the upper part of the frame plate 11 and the frame plate 12 so that the ribs 32b protrude vertically upward from the inside.
Thereafter, as illustrated in FIG. 2 and the like, the metal plate assembly 10 is covered in the parapet (chest wall) construction hole 111 and the floor slab construction hole 121 by using the frame plate 11 and the frame plate 12 as a part of the mold. As described above, the post-cast concrete 113 and the post-cast concrete 123 are cast to the depth of the buried joint construction depth H.

  At this time, the cloth bag support metal fitting in which the cloth bag support rails 17 are installed at the same interval as the metal fitting assembly 10 at both ends of the triangular space formed by the frame plate 11 and the frame plate 12 of the metal fitting assembly 10. Connected to 220 and opened.

  Then, after the post-cast concrete 113 and the post-cast concrete 123 are solidified, the upper side portion 15a of the set gibble 15 and the upper side portion 16c of the connecting bracket 16 exposed from the post-cast concrete 113 and the post-cast concrete 123 are cut out, and the first As the waterproof means, for example, a bituminous sheet 140 (first waterproof structure) is constructed so as to cover the entire upper surface of the post-cast concrete 113 and the post-cast concrete 123.

  Note that the upper side portion 15a of the set jib 15 and the upper side portion 16c of the connection fitting 16 may be excised before placing the concrete (after fixing the anchor mounting rib 13 to the concrete anchor 112 and the concrete anchor 122).

  Thereafter, the asphalt pavement leveling layer 115 and the asphalt pavement leveling layer 125 are flattened to the same thickness as the existing asphalt pavement leveling layer 161, and then paved at a desired width along the rib 32b of the trapezoidal cushioning material 32. Is cut and removed, and the joint material 130 is embedded in the excision space.

  Further, the asphalt pavement surface layer 150 is applied to the same thickness as the existing asphalt pavement surface layer 160 so as to continuously cover the asphalt pavement leveling layer 115, the joint material 130, and the asphalt pavement leveling layer 125.

Then, the secondary water stop structure 30 (2nd waterproof structure) is constructed as a 2nd waterproof means in the space inside the frame board 11 and the frame board 12 which inclines and faces as follows.
That is, first, a pair of fabric bags are supported from the side of the fabric bag support bracket 220 connected to one end of the bracket assembly 10 embedded in the finish concrete 113 and the finish concrete 123 via the fabric bag guide rail 221. The pair of ribs 31c and the guide projection 31d of the rubber sheet-attached cloth bag 31 are inserted into the slit-like opening 17a of the rail 17 and guided, and the tip end portion of the rubber sheet-attached cloth bag 31 is gradually fed. Pull out to the opening of the cloth bag support fitting 220 connected to the opening of the shoulder portion 200 on the opposite side of the fitting assembly 10.

  Thereafter, the liquid sealing material 33 is poured into the open end of the tubular portion of the cloth bag with rubber sheet 31 drawn out to the cloth bag support fitting 220, and the liquid level of the sealing material 33 inside the cloth bag support fitting 220 is increased. By maintaining the height higher than the inside of the metal fitting assembly 10 of the embedded joint structure 100 and oozing out from the mesh portion 31a on the upper side surface, the frame plate 11 and the frame plate 12 are exemplified as shown in FIG. And a frame plate 11 and a frame that fill the sealing space 33 in the sealed space surrounded by the trapezoidal cushioning material 32, the cloth bag support rail 17, the rib 31c, the rubber sheet portion 31b, etc. The space between the plates 12 is sealed with a sealing material 33 or the like to construct a secondary water stop structure 30 that exhibits a waterproof function.

As the sealing material 33, for example, a polybudagen-based water-absorbing gelled water-stopping material can be used.
After the construction of the secondary water stop structure 30, the cloth bag support fitting 220 and the road shoulder work space 210 in the road shoulder 200 are concealed by the sealing material 230.

18, FIG. 19, FIG. 20, and FIG. 21 show modifications of the embedded joint structure 100 of the present embodiment. FIG. 19 is a cross-sectional view of a portion corresponding to FIG. 2 described above.
In this modification, in the metal fitting assembly 10, an anchor mounting bar 19 (anchor connecting member) made of a stainless steel bar having a desired thickness is used instead of the plate-shaped anchor mounting rib 13 described above. The point is different. Others are the same as the structure described so far, and the corresponding members are denoted by the same reference numerals, and redundant description is omitted.

  That is, the anchor attachment bar 19 is fixed to the rear surfaces of the frame plate 11 and the frame plate 12 which are inclined and opposed by a method such as welding, and the virtual installation surface (in this case, the parapet (chest wall) construction hole 111, the floor slab It is bent in the middle so as to be parallel to the bottom surface of the construction hole 121.

As illustrated in FIGS. 20 and 21, the height adjusting structure 14 is provided on the free end side of each anchor mounting bar 19 in the same manner as in the case of the anchor mounting rib 13 described above.
In the case of the modified examples illustrated in FIGS. 18 to 21, instead of the plate-like anchor attachment ribs 13, the anchor attachment bars 19 having similar shapes to the reinforcing reinforcing bars 114 and 124 are used. As illustrated in FIG. 19, when the post-cast concrete 113 and the post-cast concrete 123 are placed, the concrete flow is improved without being disturbed by the anchor mounting rod 19, and the placement time is shortened. There is an advantage that can be realized.

  As described above, in the embedded joint structure 100 of the present embodiment, for example, in the concrete parapet (chest wall) 110 and the concrete floor slab 120 having the narrow girder gap portion G of about 0 mm to 30 mm, the stainless steel web (frame plate) 11 and the frame plate 12) are inclined to create a space that enables the installation of the triangular secondary water stop structure 30.

  Then, the gap change of the girdle gap G is changed by the trapezoidal cushioning material 32 at the top of the secondary water stop structure 30, the asphalt pavement leveling layer 115 covered by the asphalt pavement surface layer 150, and the joint material 130 of the lower asphalt pavement leveling layer 125. Is absorbed.

  In this case, the material of the frame plate 11 and the frame plate 12 is stainless steel and is not easily rusted. Since there is almost no gap at the upper end where the trapezoidal cushioning material 32 of the frame plate 11 and the frame plate 12 is installed, the pavement of the asphalt pave leveling layer 115, the asphalt pave leveling layer 125, the asphalt pavement surface layer 150, etc. is a normal pavement. be able to.

  The bottom width of the substantially triangular shape constituted by the frame plate 11 and the frame plate 12 that are inclined and opposed to each other is, for example, about 10 cm. Although the thickness is reduced, water is blocked on the front and upper surfaces by waterproofing the stainless steel and bituminous sheet 140 of the frame plates 11 and 12, and the rust prevention environment of the reinforcing reinforcing bars 114 and 124 is improved.

If necessary, the reinforcing reinforcing bar 114 and the reinforcing reinforcing bar 124 may be epoxy-coated reinforcing bars having an epoxy-coated structure as an insulator to further improve the rust prevention environment.
Since the bottom width of the substantially triangular shape composed of the frame plate 11 and the frame plate 12 that are inclined and opposed to each other is, for example, about 10 cm, it is possible to absorb construction errors in the finishing of the post-cast concrete 113 and the post-cast concrete 123.

As a result, according to the embedded joint structure 100 using the metal fitting assembly 10 of the present embodiment, the following effects can be expected.
That is, it is possible to reliably stop water leakage from the girder gap portion G between the concrete parapet (chest wall) 110 and the concrete floor slab 120. As a result, it is possible to suppress the deterioration of the end of the girder, the support and the pier due to water leakage from the girder gap G.

  Since the entire buried joint structure 100 of the present embodiment is completely buried under the asphalt pavement surface layer 150 and is not exposed on the road surface, the asphalt pavement surface layer 150 has no irregularities and travels on the asphalt pavement surface layer 150. It is possible to improve running performance and quietness without giving a step impact to the vehicle.

  Furthermore, since construction is performed using a small, simple and inexpensive metal fitting assembly 10 as illustrated in FIG. 5 and the like, materials, production costs, and construction costs are reduced compared to large steel product joints, and the cost is low. A high performance embedded joint structure 100 can be realized.

  Needless to say, the present invention is not limited to the configuration exemplified in the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 Metal fitting assembly 11 Frame board 12 Frame board 13 Anchor attachment rib 13a Reinforcing bar through-hole 14 Height adjustment structure 14a Nut attachment rib 14b Fixing nut 14c Height adjustment bolt 15 Set jib 15a Upper side 16 Connection metal fitting 16a Connection bolt / nut 16b Bolt hole 16c Upper side portion 17 Cloth bag support rail 17a Opening portion 18 Rail fixing rib 19 Anchor mounting rod 20 Filling member 20a Caulking material 30 Secondary water stop structure 31 Cloth bag with rubber sheet 31a Mesh portion 31b Rubber sheet portion 31c Rib 31d Guide protrusion 32 Trapezoidal cushioning material 32a Seal body 32b Rib 33 Sealing material 100 Embedded joint structure 110 Concrete parapet (chest wall)
111 Palpet (chest wall) construction hole 112 Concrete anchor 113 Post-cast concrete 114 Reinforcement reinforcement 115 Asphalt pavement leveling layer 120 Concrete floor slab 121 Floor slab construction hole 122 Concrete anchor 123 Post-cast concrete 124 Reinforcement reinforcement 125 Asphalt pavement leveling layer 130 Joint material 140 Bituminous sheet 150 Asphalt pavement surface layer 160 Existing asphalt pavement surface layer 161 Existing asphalt pavement leveling layer 200 Road shoulder 210 Road shoulder work space 220 Cloth bag support bracket 221 Cloth bag guide rail 230 Sealing material G Girder gap L Construction length LG Girder gap Gap W Embedded joint construction width θ Opposite angle

Claims (12)

In each of the abutment and the bridge, a step of providing an installation space on the upper surface of the end portion sandwiching the girder gap portion;
A step of installing a pair of frame plates that are supported on each side of the abutment and the bridge in the installation space and that are inclined and opposed to each other with the gap between the gaps between them so that the gap on the upper side is narrower than the gap on the lower side When,
Placing concrete in the installation space using the frame plate as a mold;
A step of arranging a first waterproof structure on the surface of the concrete so as to cover the space between the girders;
Forming at least one roadbed layer on the waterproof sheet;
Installing a second waterproof structure in a space between the pair of frame plates;
Construction method of buried joint structure including In the construction method of the buried joint structure according to claim 1,
The second waterproof structure is
A trapezoidal cushioning material that closes the gap between the upper sides of the pair of opposing frame plates;
A pair of rail members disposed on the facing surfaces of the pair of frame plates along the beam clearance portion,
Both sides of the pair of rail members are supported and inserted between the pair of the frame plates, a cylindrical waterproof bag having a waterproof structure on the lower half and a mesh structure on the upper half, and
A sealing material injected from both ends of the waterproof bag and filled in a gap between the pair of frame plates through the mesh structure;
An embedded joint structure construction method characterized by comprising: In the construction method of the buried joint structure according to claim 1,
On the back surface of each of the pair of frame plates on the opposite side to the gap between the girders, in the concrete so as to intersect with the anchors installed on each of the bridge and the abutment via a reinforcing bar in the concrete. A plurality of anchor connecting members to be embedded are fixed,
Each of the anchor connection members is provided with an installation height adjusting structure for adjusting the installation height of each of the frame plates before placing the concrete, and the construction method of the embedded joint structure is characterized in that . In the construction method of the buried joint structure according to claim 3,
The anchor connection member is composed of a plate-like member provided substantially parallel to the depth direction of the installation space or a bar-like member provided substantially parallel to the bottom surface of the installation space. Construction method. In the construction method of the buried joint structure according to any one of claims 1 to 4,
A method for constructing a buried joint structure, wherein a gap between the girder gap portions is 0 mm to 100 mm. A pair of frame plates that are inclined and face each other so that the upper side is narrower than the lower side across the gap between the abutment and the bridge girder,
Post-cast concrete placed on the upper surface of each of the abutment and the bridge as a part of the form plate,
A joint material filled in the gap between the post-cast concrete on each side of the abutment and the bridge;
A first waterproof structure disposed on the post-cast concrete so as to cross the beam gap;
At least one roadbed layer formed on the first waterproof structure;
A second waterproof structure disposed between the pair of frame plates;
An embedded joint structure characterized by including: The embedded joint structure according to claim 6,
A buried joint structure characterized in that a plurality of anchor connection members embedded in the post-cast concrete are fixed to the back surfaces of the pair of frame plates in contact with the post-cast concrete. The embedded joint structure according to claim 7,
The anchor connection member is composed of a plate-like member provided substantially parallel to the depth direction of the installation space or a bar-like member provided substantially parallel to the bottom surface of the installation space. . A pair of rectangular frame plates that are inclined and faced so that the distance between the long sides facing each other is substantially parallel;
A pair of rail members arranged in parallel with each other on the opposing surfaces of the pair of frame plates along the long side direction of the frame plate;
A plurality of anchor connection members fixed to the back surface opposite to the opposing surface of each of the frame plates;
An installation height adjusting structure that is fixed to each of the anchor connection members and adjusts the height of the pair of the frame plates relative to the virtual installation surface;
At least one temporary fixing bracket fixed so as to straddle the back of the pair of frame plates;
The embedded joint construction metal fitting assembly characterized by including. In the embedded joint installation bracket assembly according to claim 9,
The temporary fastener is
A first temporary fixing metal fitting provided at a central portion in the length direction of the pair of frame plates;
A second temporary fixing metal fitting provided at both ends of the frame plate and provided with a screw insertion hole for adding the frame plate in the length direction;
The embedded joint construction metal fitting assembly characterized by including. In the embedded joint installation bracket assembly according to claim 9,
Each said anchor connection member consists of a plate-shaped anchor connection member in which the reinforcing bar insertion hole was formed, The embedded joint installation metal fitting assembly characterized by the above-mentioned. In the embedded joint installation bracket assembly according to claim 9,
Each said anchor connection member consists of a rod-shaped anchor connection member, The embedded joint installation metal fitting assembly characterized by the above-mentioned.