JP2008248494A - Raw water conduit structure for bridge and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and inexpensively provide a conduit structure for a bridge, without dripping and sticking leakage water to concrete of a bridge body and a pier and a surface of a steel member of the bridge body, by flowing downward. <P>SOLUTION: This conduit structure for the bridge is provided with a pair of parallel wires 37 tensioned over in the bridge breadth direction by a clearance 30 of a bridge joint part J and separate in the direction of the clearance 30, a water cut-off gutter 33 inserting the longitudinal direction of a belt-like elastic sheet material 41 into the clearance 30 and hookingly supporting both upper ends by the pair of wires 37 by bending so that a cross-sectional shape in the longitudinal orthogonal direction of this belt-like elastic sheet material 41 becomes a U shape, and an adhering means 39 fixing both upper side surfaces of the water cut-off gutter 33 in close contact to respective opposed surfaces 31a and 31b sandwiching the clearance 30. The water cut-off gutter 33 can be hookingly supported in a single-flow gradient lower on the other end than one end in the longitudinal direction. A conduit of discharging flowed-in water to an external part from the water cut-off gutter 33, is desirably arranged on the downstream side end of the single-flow gradient of the water cut-off gutter 33. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a water guiding structure for a bridge and a method for constructing the same, which treats water leakage between bridge bodies which are upper structures of the bridge or between the joints of the bridge body and the abutment.

  The bridge is supported by the abutments, piers, and foundations of the substructure, such as the main girder, floor slab, and floor set (hereinafter also referred to as “bridge bodies”). Conventionally, the joint part between bridge bodies and the joint part between the bridge body and the abutment parapet (chest wall) have been provided with an extension device that absorbs the displacement between the bridge girders due to temperature difference, drying, etc. Safe and smooth traffic is secured. Usually, joints such as joints and gaps in bridge structures are waterproofed by installing a non-drainage type expansion / contraction device.

For example, in the non-drainage type expansion / contraction device shown in Patent Document 1, an asphalt layer is heated and compacted on the upper side of an elastic material composed of a porous elastic body layer and a rubber plate in a joint portion of a pair of bridge beams supported by bridge piers. Part of which penetrates into the interior through the voids of the porous elastic layer, thereby integrating with the porous elastic layer and bonding the two together. As a result, when a large gap displacement occurs due to the fluctuation of the bridge girder, the stretchable material uniformly expands and contracts according to the gap displacement, and it is avoided that a large force is locally applied, such as wrinkles, cracks, cracks, etc. in the asphalt layer. Damage is prevented from occurring. Moreover, since the lower layer of the stretchable material is a rubber plate, it prevents leakage of rainwater from the asphalt layer side, and prevents a decrease in durability due to water penetration into the bridge girder.
JP 2004-84463 A

By the way, the water stop packing in the existing expansion and contraction device attached to the bottom of the joint part of the bridge where the car that crosses the river or road travels is damaged or dropped due to vibrations, etc. Drainage treatment cannot be performed on the designed fence and leakage occurs under the bridge. The same phenomenon can be seen on large footbridges (human roads).
If this water leakage is left untreated, steel members such as abutments, bridge piers, and bridges provided in the span and concrete members are attached, and rust is generated in the steel members and concrete deterioration is caused in the concrete members. Resulting in structural defects. For this reason, it is necessary to apply special coating to bridge steel members every several years and to perform rust prevention treatment, which increases the cost.
Furthermore, in recent years, dripping water often contains calcium chloride, calcium carbonate, and calcium hydroxide, which are used as snow melting materials, and most of them are alkaline. ) Invites new problems that are likely to deteriorate. There are H steel bridges, PC bridges, RC bridges, etc., but there is a possibility that the concrete surface will also be aged by the acid water of the rain and the alkaline water of the snow melting material. It is necessary to escape outside the bridge. However, the replacement of the existing waterproofing packing (extension device) has to be carried out in a short period of time to close the road with traffic restrictions, remove the expansion device in the width direction, and newly install it. There is a possibility that it is difficult to perform proper construction, and the cost is very high.

  On the other hand, it is possible to install a hard plastic cage under the telescopic device under the bridge, but the material is hard and it is difficult to install it in a narrow space under the bridge. The water-stop packing that is initially attached to the bridge expands and contracts due to vehicle vibration and daily concrete temperature contraction, but it is damaged or dropped due to poor installation or expansion / contraction that is larger than the design. Often no longer. There is also a method of building a Ω-type post-stop water tank using vulcanized rubber sheet, etc., and attaching a Ω-type post-water tank with a stud anchor and a hole, but the joint width is often not uniform. For this reason, there is a problem that it is difficult to set up because the hole position is misaligned or the anchor is difficult to hit because it is a narrow place. Furthermore, even if a waterstop was installed as a retrofit, the water dripping along the surface of concrete and bridge steel members was difficult to conduct reliably and was often leaked.

  The present invention has been made in view of the above situation, and the first object thereof is that water leaks downward from the waterstop, and is attached to the bridge member, the concrete of the pier, or the steel member surface of the bridge member. The purpose of the present invention is to provide a water guiding structure for a bridge in which deterioration of a concrete member and rust of a steel member are prevented, and a construction method thereof, thereby preventing structural defects in the bridge. The second purpose is to provide a water guide structure for a bridge that can be easily and reliably installed even in a narrow gap under a narrow bridge, and a construction method thereof. The purpose is to enable installation at low cost.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The water guide structure for a bridge according to claim 1 of the present invention includes a pair of parallel wires 37 that are stretched across the bridge width direction at the gap 30 of the bridge joint portion J and separated in the direction of the gap 30;
The band-shaped elastic sheet material 41 is inserted into the gap 30 and bent so that the cross-sectional shape of the band-shaped elastic sheet material 41 in the longitudinal orthogonal direction is U-shaped, and the upper ends are caught by the pair of wires 37. The waterstop 33 that was supported,
Adhesive means 39 for tightly fixing both upper side surfaces of the waterstop 33 to the opposing surfaces 31a and 31b sandwiching the gap 30;
It is characterized by comprising.

  In this water guiding structure for bridges, both upper side surfaces of the waterstop 33 are brought into close contact with the opposing surfaces 31a and 31b by the bonding means 39, and water leaking down through the opposing surfaces 31a and 31b is received by the waterstop 33. As a result, this water leaks downward from the waterstop 33 and does not adhere to the concrete of the bridge body or the pier or the steel member surface of the bridge body, resulting in deterioration of the concrete in the concrete member and rust in the steel member. No longer.

  The water guide structure for a bridge according to claim 2 is characterized in that the waterstop 33 is supported by a single-flow gradient whose other end is lower than one end in the longitudinal direction.

  In this bridge water guide structure, the fixing positions of both ends of the wire 37 can be adjusted only on the outside of both sides of the gap 30 in the width direction, and a desired flow direction can be set with an arbitrary gradient.

  The water guiding structure for a bridge according to claim 3 is characterized in that the waterstop 33 is supported by both flow gradients whose both ends are lower than the substantially central portion in the longitudinal direction.

  In this bridge water guide structure, when the wire fixing in the gap 30 is possible, the substantially central portion of the waterstop 33 is fixed higher than both ends, so that the short flow path that bisects the entire length of the waterstop 33 Can be formed.

  The water guide structure for a bridge according to claim 4 is configured such that water that has flowed into the waterstop 33 through the facing surfaces 31a and 31b of the bridge joint portion J is transferred to the downstream end of the flow gradient of the waterstop 33. A water conduit 47 for draining the water from the waterstop 33 is provided.

  In this water guide structure for bridges, the water that flows into the waterstop 33 and flows down along the flow gradient is guided to the water conduit 47 installed at the downstream end, and is appropriately guided to a desired drainage channel.

  The water guiding structure for a bridge according to claim 5 is characterized in that the end in the longitudinal direction of the waterstop 33 is closed by adhering the inner wall facing surfaces of the belt-like elastic sheet material 41 to each other.

  In this bridge water guide structure, the inner wall facing surfaces of the belt-shaped elastic sheet material 41 are bonded to each other, whereby the opening at the longitudinal end of the waterstop 33 bent into a U-shape is closed, and the waterstop The appearance of 33 becomes good. Moreover, the strength at the longitudinal direction end of the waterstop 33 is also increased.

In the construction method of the water guiding structure for a bridge according to claim 6, one end of the pair of wires 37 is fixed to one end in the width direction of the bridge joint portion J,
The pair of wires 37 are passed through the upper ends of the waterstop 33 made of the band-shaped elastic sheet material 41 bent so that the cross-sectional shape in the longitudinal orthogonal direction is U-shaped,
While inserting the other end of the pair of wires 37 into the gap 30 of the bridge joint portion J in the bridge width direction, the waterstop 33 is inserted into the gap 30;
By fixing the other end of the pair of inserted wires 37, the waterstop 33 is supported by the gap 30 of the bridge joint portion J.
The release sheet of the adhesive means 39 provided on both upper side surfaces of the waterstop 33 is removed, and the upper side surfaces are closely fixed to the opposing surfaces 31a and 31b of the gap 30.

  In this construction method of the water conveyance structure for a bridge, it is possible to manually insert the wire 37 into the gap 30 even in the gap 30 under the narrow bridge, and the post-stop water stop is performed only under the bridge without traffic restrictions. The eaves 33 can be installed.

The construction method of the water guide structure for a bridge according to claim 7, the elastic tube 51 that is elastically expandable in the radial direction is inserted through the U-shaped inner space of the waterstop 33 across the width,
One end of the elastic tube 51 is closed or reduced in diameter, and the adhering means 39 provided on both upper side surfaces of the waterstop 33 with the elastic tube 51 expanded by supplying compressed air from the other end. Is pressed to the facing surfaces 31a and 31b from the inner space side.

  In this construction method of the water guide structure for a bridge, the adhesion means 39 after removing the release sheet is pressed against the opposing surfaces 31a and 31b by the elastic tube 51 whose diameter has been expanded, and reliable adhesion to the opposing surfaces 31a and 31b. Fixing is possible.

  According to the water guiding structure for a bridge according to claim 1 of the present invention, a pair of parallel wires are stretched across the bridge width direction of the bridge joint portion, and a band-shaped elastic sheet material is formed in a U shape on the wires. Since both ends of the top of the waterstop bent so as to be supported and both upper side surfaces of the waterstop were fixed to each of the opposing surfaces across the gap by adhesive means, both upper side surfaces of the waterstop Is brought into close contact with the opposing surface by the bonding means, and the water leaking along the opposing surface is received by the waterstop. Therefore, this water leaks downward from the waterstop and does not stick to the concrete of the bridge body or pier or the steel member surface of the bridge body, preventing concrete deterioration in the concrete member and rust in the steel member. . As a result, the occurrence of structural defects can be prevented. In addition, since the belt-like elastic sheet material is used for the waterstop, it is excellent in flexibility, and the waterstop is made U even in a gap under a narrow bridge by giving a hole processing for passing a wire to the upper both ends. It can be easily and reliably attached by bending it into a letter shape.

  According to the water guiding structure for a bridge according to claim 2, since the waterstop is supported by a single flow gradient whose other end is lower than one end in the longitudinal direction, both sides in the width direction of the gap can be obtained without fixing the wire in the gap. The desired flow direction can be set with an arbitrary gradient by adjusting the fixed positions of both ends of the wire only outside the wire.

  According to the water guiding structure for a bridge according to claim 3, since the waterstop is supported by both flow gradients whose both ends are lower than the substantially central portion in the longitudinal direction, when the wire can be fixed in the gap, A short channel that divides the entire length of the waterstop can be formed by raising the substantially central portion of the ridge. As a result, a linear flow gradient can be reliably formed, and pooled water can be hardly generated.

  According to the water conduit structure for a bridge according to claim 4, the water that flows into the waterstop via the opposite surface of the bridge joint portion at the downstream end of the flow gradient of the waterstop is drained from the waterstop to the outside. Since the water pipe is disposed, the water flowing into the waterstop can be appropriately guided to a desired drainage channel. Thereby, the surrounding pollution by drainage can be prevented.

  According to the water guiding structure for a bridge according to claim 5, since the longitudinal ends of the waterstop are closed by adhering the inner wall facing surfaces of the belt-like elastic sheet material, the appearance of the waterstop can be improved. it can. Moreover, it is possible to make it difficult to deform the U-shape of the waterstop.

  According to the construction method of the water guiding structure for a bridge according to claim 6, a band-shaped elastic sheet in which one end of a pair of wires is fixed to one end in a width direction of the bridge joint portion and is bent so that a cross-sectional shape is U-shaped. Pass this wire through the upper ends of a waterstop made of wood, insert the waterstop while inserting the other end of the wire in the direction of the bridge width of the gap, and fix the other end of the pair of inserted wires. Since the water tank is supported by the gap, the release sheet is removed, and both upper side surfaces of the water tank are closely fixed to the opposite surface of the gap, so the wire is manually inserted into the gap even in the gap under the narrow bridge. Thus, the waterstop can be easily and surely attached by bending it into a U-shape. As a result, there is no work on the bridge, and it is possible to install a post-stop water tank only by the construction under the bridge without traffic restrictions. In addition, since it does not take time and effort, it is easy to install, and the construction can be completed in a short time, thereby reducing the construction cost.

  According to the construction method of the water guiding structure for a bridge according to claim 7, an elastic tube that is elastic in the radial direction is inserted into the U-shaped inner space of the waterstop, and one end of the elastic tube is closed or contracted. The adhesive means provided on both sides of the top of the waterstop is pressed against the opposite surface with an elastic tube that is expanded by supplying compressed air from the other end. The means can be securely bonded to the opposing surface, and a high water leakage prevention structure can be obtained.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a water guiding structure for a bridge and a construction method thereof according to the invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a water conduit structure for a bridge according to the present invention, FIG. 2 is a longitudinal sectional view of a main part of a bridge provided with the water conduit structure for a bridge shown in FIG. 1, and FIG. 3 is a water conduit for a bridge shown in FIG. FIG. 4 is a side view of the modification in which the flow gradient is both flows, as viewed from the direction orthogonal to the width direction.
The bridge 17 includes a main girder 19, a floor slab 21, a floor set 23, and the like (which are referred to as “bridge bodies”), which are an upper structure, an abutment 11, a pier (not shown), a foundation (a figure) (Not shown). The water conveyance structure for a bridge according to the present invention is provided at a joint portion between bridge bodies or a joint portion between a bridge body and an abutment parapet (chest wall). In the present embodiment, an example will be described in which the water guide structure for a bridge is provided in a joint portion between a bridge body and an abutment parapet (chest wall), particularly in a portion A in FIG.

  As shown in FIG. 2, a step portion 13 is formed in the upper part of the abutment 11, and the step portion 13 has a main girder 19 of the bridge body placed via a support member 15. An expansion / contraction device 25 is provided at the joint between the floor assembly 23 supported by the main girder 19 and the abutment 11, and the expansion / contraction device 25 has comb-like plate plates 25a, which are alternately meshed with the upper surface opening of the joint. It is covered with 25b. An existing water stop 27 is provided below the gap 29 covered by the plate plates 25a and 25b. In other words, the bridge water guide structure according to the present embodiment has an action of catching water leakage from the existing waterstop 27 and water leakage when the existing waterstop 27 is dropped.

  As shown in FIG. 1, a pair of parallel wires 37 and 37 are inserted into the gap 30 of the bridge joint portion J, and the wires 37 and 37 are connected to turnbuckles, which will be described later, at both ends. Ring portions 37a and 37a are provided. The wires 37, 37 are stretched across the bridge width direction and are separated in the direction of the gap 30 (left-right direction in FIG. 1).

  The longitudinal direction of the belt-like elastic sheet material 41 is inserted into the gap 30. The belt-like elastic sheet material 41 is bent so that the cross-sectional shape in the longitudinal orthogonal direction is U-shaped, and both upper ends are supported by a pair of wires 37 and 37. That is, the belt-like elastic sheet material 41 forms a waterstop 33 having an inner U-shaped flow path. A plurality of wire insertion portions 35 are attached to both ends of the upper portion of the waterstop 33 at predetermined intervals in the longitudinal direction, and the wire insertion portions 35 are fixed to the inner surface side of the waterstop 33. The waterstop 33 secures the flatness of the surface bonded to the opposing surface described later by arranging the wire insertion portion 35 inside.

  As the above-described belt-like elastic sheet material 41, a metallocene-catalyzed polyethylene sheet (for example, “Metalobarrier (trade name)” manufactured by CII Kasei Co., Ltd.) superior in water-stopping, oil resistance, workability, and maintainability compared to conventional rubber materials. ) Can be suitably used.

  The waterstop 33 is bonded to the opposing surfaces 31 a and 31 b of the gap 30 at both upper side surfaces. That is, the adhesive means 39 is provided on both upper side surfaces of the waterstop 33, and the adhesive means 39 adheres and fixes the upper side surfaces of the waterstop 33 to each of the opposing surfaces 31a and 31b across the gap 30. As the bonding means 39, an adhesive butyl tape can be suitably used. The adhesive butyl tape is continuously stuck in the longitudinal direction on both upper side surfaces of the waterstop 33, and for example, a release sheet is stuck on the surface. The release sheet is peeled off after the waterstop 33 is supported at a predetermined position.

  For example, as shown in FIG. 3, the waterstop 33 is supported by a single-flow gradient whose other end (left end in the figure) is lower than one end in the longitudinal direction (right end in the figure). According to this configuration, it is not necessary to fix the wires 37 and 37 in the gap 30, and the fixing positions (vertical height positions) of the ring portions 37 a and 37 a at both ends of the wire only on the outside on both sides in the width direction of the gap 30. Can be adjusted, and a desired flow direction can be set with an arbitrary gradient.

  Further, as shown in FIG. 4, the waterstop 33 may be supported by both flow gradients whose both ends (left and right ends) are lower than the substantially central portion in the longitudinal direction. According to this configuration, when the wire can be fixed in the gap 30, the substantially central portion of the waterstop 33 is fixed higher than both ends, so that a short flow path that bisects the entire length of the waterstop 33 is formed. It can be formed. As a result, a linear flow gradient can be reliably formed, and pooled water can be hardly generated.

FIG. 5 is an enlarged perspective view of the end of a waterstop with a water guide pipe disposed therein, and FIG. 6 is a plan view of FIG.
A water guide pipe 47 is disposed at the downstream end of the water gradient of the waterstop 33, and the water guide pipe 47 transfers the water flowing into the waterstop 33 through the opposing surfaces 31 a and 31 b in the joint portion J. Drain from the basin 33 to the outside. In the illustrated example, the downstream end of the water stop rod 33 is opened in an unblocked state, and the water conduit 47 having an upper portion opened directly below the opening is disposed. However, the connection structure of the water conduit 47 is limited to this. is not. According to this configuration, the water flowing into the waterstop 33 and flowing down along the flow gradient is guided to the water conduit 47 installed at the downstream end, and is appropriately guided to a desired drainage channel. Thereby, the surrounding pollution by drainage can be prevented. In the drawing, reference numeral 43 denotes a turnbuckle connected to the ring portions 37 a and 37 a of the wires 37 and 37, and 45 denotes an anchor that supports the turnbuckle 43.

FIG. 7 is an enlarged perspective view of a waterstop with the end closed, and FIG. 8 is a plan view of FIG.
Further, the waterstop 33 may have the end portion in the longitudinal direction as the closed portion 41a by bonding the inner wall facing surfaces of the belt-like elastic sheet material 41 to each other. In this case, the water conduit 49 is connected to the bottom near the blocking portion 41a. According to this configuration, the inner wall facing surfaces of the belt-shaped elastic sheet material 41 are bonded to each other, whereby the opening at the longitudinal end portion of the waterstop 33 bent into a U shape is closed, and the waterstop 33 Looks good. Moreover, the strength at the longitudinal end of the waterstop 33 is increased, and the U-shape of the waterstop 33 can be made difficult to deform.

  In the water guiding structure for a bridge described above, both upper side surfaces of the waterstop 33 are brought into close contact with the opposing surfaces 31a and 31b by the bonding means 39, and water leaking down through the opposing surfaces 31a and 31b is received by the waterstop 33. . As a result, this water leakage flows downward from the waterstop 33 and does not adhere to the surface of the bridge body, abutment 11, concrete of the pier, or the steel member (main girder 19) of the bridge body, and concrete deterioration in the concrete member The rust in the steel member is not generated.

Next, the construction method of the above-described bridge water guiding structure will be described.
FIG. 9 is a longitudinal sectional view showing a state where the adhesive means is pressed by the elastic tube.
The bridge water-conducting structure is constructed by post-construction on, for example, a bridge joint portion J provided with an existing waterstop 27. First, one end of the pair of wires 37 and 37 is fixed to the anchor 45 via the turnbuckle 43 at one end in the width direction of the bridge joint portion J. Next, a pair of wires 37 are passed through the upper ends (wire insertion part 35) of the waterstop 33 made of the band-shaped elastic sheet material 41 bent so that the cross-sectional shape in the longitudinal orthogonal direction is U-shaped.

  Next, the waterstop 33 is inserted into the gap 30 while the other ends of the pair of wires 37 and 37 are inserted into the gap 30 of the bridge joint portion J in the bridge width direction. The other end of the pair of inserted wires 37 and 37 is fixed by an anchor 45 through a turnbuckle 43. Thereby, the waterstop 33 is supported by the gap 30 of the bridge joint portion J. Finally, the release sheet (not shown) of the bonding means 39 provided on both upper side surfaces of the waterstop 33 is removed, and the upper side surfaces are closely fixed to the facing surfaces 31a and 31b of the gap 30. Thus, even in the gap under the narrow bridge, the wires 37 and 37 can be manually inserted into the gap 30 and the post-stop water dredging can be performed only by the construction under the bridge without restricting traffic on the bridge. 33 can be installed.

  Further, an elastic tube 51 that is elastic in the radial direction is inserted through the width inside the U-shaped inner space of the waterstop 33, and one end of the elastic tube 51 is closed or reduced in diameter and compressed from the other end. You may press the adhesion means 39 provided in the upper both sides | surfaces of the waterstop 33 to the opposing surfaces 31a and 31b from the inner space side with the elastic tube 51 which expanded the diameter by supplying air. By adding such a pressing step of the bonding means 39, the bonding means 39 after removing the release sheet is pressed against the facing surfaces 31a and 31b by the elastic tube 51 whose diameter has been expanded, and the facing surfaces 31a and 31b. Reliable adhesion and fixation to can be achieved. Thereby, a still higher water leakage prevention structure can be obtained.

  According to the above water-conducting structure for a bridge, a pair of parallel wires 37, 37 are stretched across the bridge width direction of the bridge joint portion J, and a belt-like elastic sheet material 41 is U-shaped on the wires 37, 37. Since both ends of the upper part of the waterstop 33 bent so as to be supported and both side surfaces of the upper part of the waterstop 33 are fixed to each of the opposing surfaces 31a and 31b across the gap 30 by the adhesive means 39. The upper both side surfaces of the waterstop 33 are brought into close contact with the opposing surfaces 31a and 31b by the bonding means 39, and the water leaking down along the opposing surfaces 31a and 31b is received by the waterstop 33.

  Therefore, the water leaks downward from the waterstop 33 and does not adhere to the concrete of the bridge body, the pier or the steel member surface of the bridge body, thereby preventing deterioration of the concrete in the concrete member and rust in the steel member. The As a result, the occurrence of structural defects can be prevented. In addition, since the belt-like elastic sheet material 41 is used for the waterstop 33, it is excellent in flexibility, and holes and the like for passing the wires 37, 37 are provided at both upper ends thereof (rings 37a, 37a are attached). Therefore, even in a gap under a narrow bridge, the waterstop 33 can be bent into a U shape and attached easily and reliably.

  In addition to this, the waterstop 33 attached later is made of polyethylene which is soft and excellent in chemical resistance, and therefore has excellent durability. In particular, since it is a material corresponding to strong alkaline water generated from a snow melting material or the like, it is difficult to deteriorate even when it is used for a bridge in a snowy area, and durability can be improved. Moreover, since the wires 37 and 37 are fixed with the anchor 45 via the turnbuckle 43, when there is something wrong, the tension of the wires 37 and 37 can be loosened and the current status of the waterstop 33 can be easily checked. Can be easily replaced.

  Moreover, according to the construction method of the water conveyance structure for a bridge, the water stop which was bent so that one end of a pair of wires 37 and 37 was fixed to one end of the width direction of the bridge joint part J, and a cross-sectional shape might become U shape. By passing the wires 37, 37 through the flange 33, inserting the waterstop 33 while inserting the other end into the gap 30, and fixing the wires 37, 37 drawn from the other gap 30, the waterstop 33 A fishing can be supported by the gap 30. Then, since the release sheet is removed and both upper side surfaces of the waterstop 33 are closely fixed to the opposing surfaces 31a and 31b of the gap 30, the wires 37 and 37 are manually inserted into the gap 30 even in the gap under the narrow bridge. Thus, the waterstop 33 can be easily and reliably attached.

  As a result, it is possible to install the retrofitting waterstop 33 only by the construction under the bridge without applying traffic restrictions. In addition, since it does not take time and effort, it is easy to install, and the construction can be completed in a short time, thereby reducing the construction cost. The release sheet can be peeled off after the waterstop 33 is supported at a predetermined position by pulling a string fastened to one end in the width direction from the other end in the width direction.

It is a longitudinal section of the water guide structure for bridges concerning the present invention. It is a principal part longitudinal cross-sectional view of the bridge provided with the water guide structure for bridges shown in FIG. It is the side view which looked at the water conveyance structure for bridges shown in FIG. 1 from the direction orthogonal to the width direction. It is a side view of the modification which made the flow gradient into both flows. It is an expansion perspective view of the water stop collar part by which the water guide pipe was arrange | positioned. FIG. 6 is a plan view of FIG. 5. It is an expansion perspective view of the waterstop with the edge part closed. FIG. 8 is a plan view of FIG. 7. It is a longitudinal cross-sectional view of the state which presses the adhesion | attachment means with an elastic tube.

Explanation of symbols

DESCRIPTION OF SYMBOLS 17 ... Bridge 30 ... Gap 31a, 31b ... Opposite surface 33 ... Water stop 37 ... Wire 39 ... Adhesive means 41 ... Strip | belt-shaped elastic sheet material 47 ... Water guide pipe 51 ... Elastic tube J ... Joint part

Claims (7)

A pair of parallel wires stretched across the bridge width direction in the gap of the bridge joint portion and spaced apart in the direction of the gap;
A water stop which is inserted in the gap in the longitudinal direction of the belt-like elastic sheet material, bent so that the cross-sectional shape in the longitudinal orthogonal direction of the belt-like elastic sheet material is U-shaped, and is supported by the pair of wires at the upper ends.樋,
Bonding means for tightly fixing the upper both side surfaces of the waterstop to each of the opposing surfaces across the gap;
A water-conducting structure for a bridge characterized by comprising:   The water guide structure for a bridge according to claim 1, wherein the waterstop is supported by a single-flow gradient whose other end is lower than one end in the longitudinal direction.   The water guide structure for a bridge according to claim 1, wherein the waterstop is supported by a double flow gradient whose both ends are lower than a substantially central portion in the longitudinal direction.   A water guide pipe for draining water that has flowed into the waterstop via the facing surface of the bridge joint portion to the outside is disposed at the downstream end of the flow gradient of the waterstop. The water guiding structure for a bridge according to claim 2 or 3, characterized in that:   The water guide structure for a bridge according to claim 4, wherein the longitudinal ends of the waterstop are closed by adhering the inner wall facing surfaces of the belt-like elastic sheet material. Fix one end of a pair of wires to one end in the width direction of the bridge joint,
Pass the pair of wires through the upper ends of the waterstop made of a band-shaped elastic sheet material bent so that the cross-sectional shape in the longitudinal orthogonal direction is U-shaped,
While inserting the other end of the pair of wires into the gap of the bridge joint portion in the width direction of the bridge while inserting the waterstop through the gap,
By fixing the other end of the pair of inserted wires, the waterstop is supported by the gap between the bridge joints,
A method for constructing a water guiding structure for a bridge, wherein a peeling sheet of an adhesive means provided on both upper side surfaces of the waterstop is removed, and the upper side surfaces are closely fixed to opposite surfaces of the gap. An elastic tube that is elastic in the radial direction is inserted across the width into the U-shaped inner space of the waterstop,
One end of the elastic tube is closed or reduced in diameter, and the adhesive means provided on both upper side surfaces of the waterstop with the elastic tube expanded by supplying compressed air from the other end is provided on the inner space side. The method for constructing a water guiding structure for a bridge according to claim 6, wherein the structure is pressed against the opposite surface.

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