CN215518438U - A repair structure for box culvert expansion joint - Google Patents
A repair structure for box culvert expansion joint Download PDFInfo
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- CN215518438U CN215518438U CN202120182309.2U CN202120182309U CN215518438U CN 215518438 U CN215518438 U CN 215518438U CN 202120182309 U CN202120182309 U CN 202120182309U CN 215518438 U CN215518438 U CN 215518438U
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Abstract
The utility model discloses a repair structure for an expansion joint of a box culvert, which comprises a leakage blocking layer and a waterproof layer, wherein the leakage blocking layer and the waterproof layer are sequentially connected from inside to outside along the longitudinal direction of the expansion joint; the plugging layer comprises a polyurethane water-soluble plugging agent layer, a pitch hemp thread layer and a quick-drying cement layer which are sequentially connected from inside to outside along the longitudinal direction of the expansion joint; the asphalt hemp thread layer and the quick-drying cement layer are provided with a grouting pipe communicated with the polyurethane water-soluble plugging agent layer in a penetrating way; the waterproof layer comprises a first caulking layer, a rubber water stop belt layer and a second caulking layer which are sequentially connected from inside to outside along the longitudinal direction of the expansion joint; the rubber waterstop comprises a bulge part for covering the expansion joint and extending parts connected with two sides of the bulge part; the extension is compressed tightly by the back up coat, and the back up coat includes the stainless steel clamp plate, and the stainless steel clamp plate passes through the crab-bolt to be connected with the extension. The restoration structure for the box culvert expansion joint has the advantages of small damage to the original structure, less construction steps and good restoration effect.
Description
Technical Field
The utility model relates to the field of box culvert trenchless repair, in particular to a repair structure for box culvert expansion joints.
Background
With the advance of urbanization, most of box culverts designed and constructed in early years are close to the design service life, and the construction mode of digging and repairing roads is more and more limited due to more and more underground pipelines and increasing traffic flow.
The traditional expansion joint repairing method needs to destroy an original concrete structure and a middle-buried rubber water stop belt and re-lay a middle-buried rubber water stop belt, so that the original concrete structure is greatly damaged, and potential safety hazards such as sand leakage, collapse and the like are easily caused when the concrete structure which is seriously corroded, seriously loses the structural bearing capacity and seriously leaks water at the position of the expansion joint is damaged improperly. The waterstop pull ring is suitable for repairing expansion joints of most old concrete structures, and has a wide application prospect.
Most old box culverts are of cast-in-place concrete structure, and there are expansion joints at intervals. The old box culverts used up to now for many years are seriously corroded, the loss of the bearing capacity of the structure is serious, and particularly, the water leakage at the position of the expansion joint is serious, so that great potential safety hazards exist. This application adopts waterstop pull ring movement joint restoration technique to the expansion joint, buries a waterstop outside again in original old box culvert promptly to the repair mode of sealed gluey caulking of two ingredient polysulphides has remain the service function of expansion joint.
Disclosure of Invention
The utility model aims to solve the technical problem of non-destructive repair of a concrete box culvert expansion joint, and provides a repair structure for the box culvert expansion joint, which comprises a leakage blocking layer and a waterproof layer, wherein the leakage blocking layer and the waterproof layer are sequentially connected from inside to outside along the longitudinal direction of a telescopic joint;
the plugging layer comprises a polyurethane water-soluble plugging agent layer, a pitch hemp thread layer and a quick-drying cement layer which are sequentially connected from inside to outside along the longitudinal direction of the expansion joint; the asphalt hemp thread layer and the quick-drying cement layer are provided with a grouting pipe communicated with the polyurethane water-soluble plugging agent layer in a penetrating way;
the waterproof layer comprises a first caulking layer, a rubber water stop belt layer and a second caulking layer which are sequentially connected from inside to outside along the longitudinal direction of the expansion joint; the rubber waterstop comprises a bulge part for covering the expansion joint and extending parts connected with two sides of the bulge part;
the extension is compressed tightly by the back up coat, and the back up coat includes the stainless steel clamp plate, and the stainless steel clamp plate passes through the crab-bolt to be connected with the extension.
Further, a foam board layer is arranged between the plugging layer and the waterproof layer.
Further, the thickness of the rubber waterstop is 8mm, the width of the bulge is 50mm, the height of the bulge is 40mm, and the length of the extending part is 125 mm.
Further, one side of the extension part close to the box culvert is provided with a first rib and a second rib which are 6mm high, the distance between the first rib and the protruding part is 80mm, and the distance between the second rib and the protruding part is 105 mm.
Further, the stainless steel pressing plate is a 316L stainless steel pressing plate, and the width of the stainless steel pressing plate is 80 mm.
Furthermore, the periphery of the expansion joint is provided with a reinforcing mesh and is sprayed with high-strength mortar, and the end part of the anchor bolt can penetrate through the reinforcing mesh and the high-strength mortar and is connected with the inner wall of the box culvert.
Further, the reinforcing layer is covered with an anti-corrosion mortar layer.
The utility model has the following beneficial effects:
1. the restoration structure for the box culvert expansion joint has the advantages of small damage to the original structure, less construction steps and good restoration effect.
2. According to the restoration structure for the box culvert expansion joint, the leakage blocking layer and the waterproof layer are arranged, so that underground water cannot leak into the box culvert and sewage cannot leak out of the box culvert while the expansion function of the expansion joint is ensured.
Drawings
Fig. 1 is a schematic cross-sectional structure view of a preferred embodiment of a repair structure for a box culvert expansion joint disclosed by the utility model.
Fig. 2 is a schematic cross-sectional structure view of the rubber waterstop in fig. 1.
Fig. 3 is a schematic cross-sectional structure view of another preferred embodiment of the repair structure for box culvert expansion joints disclosed in the present invention.
In the figure, a polyurethane water-soluble plugging agent layer 1, an asphalt hemp thread layer 2, a grouting pipe 21, a quick-drying cement layer 3, a first caulking layer 4, a rubber water stop 5, a convex part 51, an extension part 52, a first rib 53, a second rib 54, a stainless steel pressing plate 521, an anchor bolt 522, a high-strength mortar layer 523, a second caulking layer 6, a middle-buried rubber water stop 7, an anti-corrosion mortar layer 8, a foam plate 9 and a reinforcing mesh 10.
Detailed Description
The utility model is described in further detail below with reference to the data in conjunction with the figures. It should be understood that the embodiments are only intended to illustrate the utility model and do not limit the scope of the utility model in any way.
As shown in fig. 1, in a preferred embodiment of the present invention, a repairing structure for an expansion joint of a box culvert comprises a leakage blocking layer and a waterproof layer, which are sequentially connected from inside to outside along a longitudinal direction of the expansion joint; wherein the expansion joint is inboard for expansion joint one side near the box culvert outer wall, and the expansion joint is the expansion joint outside for expansion joint one side near the box culvert inner wall.
The plugging layer comprises a polyurethane water-soluble plugging agent layer 1, an asphalt hemp thread layer 2 and a quick-drying cement layer 3 which are sequentially connected from inside to outside along the longitudinal direction of the expansion joint; the asphalt hemp thread layer 2 and the quick-drying cement layer 3 are provided with a grouting pipe 21 communicated with the polyurethane water-soluble plugging agent layer 1 in a penetrating way, namely the asphalt hemp thread layer 2 and the quick-drying cement layer 3 are filled outside the grouting pipe 21.
The function of the plugging layer is as follows: because the old concrete box culvert expansion joint adopts the middle-buried rubber waterstop 75, the service life is long, and the water-stopping effect is poor, even damaged; therefore, the plugging layer is filled with asphalt hemp threads and quick-drying cement at the position of the expansion joint on the basis, and the polyurethane water-soluble plugging agent is injected through the grouting pipe 21 to ensure that the position of the expansion joint is watertight, namely water on the outer side of the box culvert cannot enter the expansion joint; because the water-soluble plugging agent of the water-soluble plugging agent layer 1 has better fluidity, the asphalt hemp threads are filled for plugging, and then the water-soluble plugging agent is injected, so that the leakage of the water-soluble plugging agent can be prevented.
The waterproof layer comprises a first caulking layer 4, a rubber waterstop 5 layer and a second caulking layer 6 which are sequentially connected from inside to outside along the longitudinal direction of the expansion joint; the caulking layer is made of two-component polysulfide sealant, and the rubber water stop 5 comprises a bulge 51 for covering the expansion joint and extending parts 52 connected with two sides of the bulge 51; the waterproof layer has the following functions: on the basis of the original leakage blocking layer, a rubber water stop belt 5 is externally attached to play a dual role in ensuring the waterproof performance of the position of the expansion joint of the box culvert, namely underground water does not leak into the box culvert and sewage does not leak out of the box culvert, the rubber water stop belt 5 is used for stopping water on one hand, and on the other hand, the middle bulge structure can keep the structure extension contractibility of the position of the expansion joint;
the extension part 52 is pressed on the inner wall of the box culvert by a reinforcing layer, the reinforcing layer comprises a stainless steel pressing plate 521, and the stainless steel pressing plate 521 is connected with the extension part 52 through an anchor bolt 522, so that the rubber water stop 5 is tightly fixed on the outer side of the expansion joint. The stainless steel pressing plate 521 is a 316L stainless steel plate, and the width of the stainless steel pressing plate 521 is 80 mm. In this embodiment, be provided with high strength mortar layer 523 between extension 52 and the box culvert inner wall, the tip of crab-bolt 522 can run through high strength mortar layer 523 and with box culvert inner wall connection, high strength mortar layer 523 can prevent that crab-bolt 522 from damaging the structure of box culvert that treats to restore when running through the box culvert inner wall. Wherein the outer surfaces of the first caulking layer 4 and the high-strength mortar layer 523 are aligned; in this embodiment, the repair structure is also covered with a layer of anti-corrosive mortar 8, and the outer surfaces of the second caulk layer 6 and the anti-corrosive mortar layer 8 are aligned.
As shown in fig. 2, in this embodiment, the rubber water stop 5 has a thickness of 8mm, a width of the projection 51 is 50mm, a height of the projection 51 is 40mm, and a length of the extension 52 is 125 mm.
The extension 52 is provided with a first rib 53 and a second rib 54 with the height of 6mm on one side close to the box culvert, the first rib 53 is 80mm away from the boss 51, and the second rib 54 is 105mm away from the boss 51. The ribs of the extension 52 can increase the contact area and increase the friction force, so that the sliding is not easy to occur; and two ribs are arranged to further retain water.
The construction method for the expansion joint repairing structure comprises the following steps:
1) plugging the water seepage part by adopting asphalt hemp threads combined with quick-drying cement at the expansion joint, and burying a grouting pressure pipe during plugging;
2) injecting a polyurethane water-soluble plugging agent into the expansion joint;
3) cutting off the grouting pipe 21, and curing and sealing holes;
4) spraying a layer of high-strength mortar with the same width as the extension part 52 around the expansion joint, and leveling;
5) caulking by using caulking glue, namely a first caulking layer 4;
6) externally attaching a rubber water stop 5, installing a stainless steel pressing plate 521 and an anchor bolt 522;
7) and (3) leveling the inorganic anti-corrosion mortar of the bottom plate, and performing secondary caulking by using sealant in the middle, namely a second caulking layer 6.
Another preferred embodiment as shown in fig. 3 shows a repair structure when the expansion joint is located at the top plate of the box culvert, the expansion joint is provided with a steel mesh 10 at the periphery and sprayed with a high-strength mortar layer 523, and the ends of the anchor bolts 522 can penetrate through the steel mesh 10 and the high-strength mortar layer 523 and are connected with the inner wall of the box culvert. And a foam board 9 layer is also arranged between the leakage blocking layer and the waterproof layer. The outer surfaces of the first caulking layer 4 and the high-strength mortar layer 523 are aligned; the outer surfaces of the second caulking layer 6 and the anti-corrosion mortar layer 8 are aligned.
Because the box culvert roof is restoreed, need set up reinforcing bar net 10 and the spraying has high strength mortar to consolidate to the expansion joint periphery of roof, therefore the expansion joint is darker than the expansion joint of original box culvert, and the high strength mortar layer 523 of later stage spraying is inconsistent with the elasticity performance of original box culvert, guarantees the elasticity performance at expansion joint when consequently can carry out the shutoff to the expansion joint through setting up cystosepiment 9.
The construction method for the roof expansion joint repairing structure comprises the following steps:
1) plugging the water seepage part by adopting asphalt hemp threads combined with quick-drying cement at the expansion joint, and burying a grouting pressure pipe during plugging;
2) injecting a polyurethane water-soluble plugging agent into the expansion joint;
3) cutting off the grouting pipe 21, and curing and sealing holes;
4) planting bars on the top plate, binding and welding a reinforcing mesh 10, embedding a foam plate 9 at the position of the expansion joint, and spraying high-strength mortar;
5) caulking by using caulking glue, namely a first caulking layer 4;
6) externally attaching a rubber water stop 5, installing a stainless steel pressing plate 521 and an anchor bolt 522;
7) and after the stainless steel plate is installed and the anticorrosive mortar is poured, performing secondary caulking by using sealant in the middle, namely a second caulking layer 6.
The technical indexes of the rubber waterstop of the utility model are as follows:
the foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (9)
1. A repair structure for an expansion joint of a box culvert is characterized by comprising a leakage blocking layer and a waterproof layer which are sequentially connected from inside to outside along the longitudinal direction of the expansion joint;
the plugging layer comprises a polyurethane water-soluble plugging agent layer, a pitch hemp thread layer and a quick-drying cement layer which are sequentially connected from inside to outside along the longitudinal direction of the expansion joint; the asphalt hemp thread layer and the quick-drying cement layer are provided with a grouting pipe communicated with the polyurethane water-soluble plugging agent layer in a penetrating way;
the waterproof layer comprises a first caulking layer, a rubber water stop belt layer and a second caulking layer which are sequentially connected from inside to outside along the longitudinal direction of the expansion joint; the rubber water stop comprises a bulge part for covering the expansion joint and extension parts connected with two sides of the bulge part;
the extension part is pressed by the reinforcing layer, the reinforcing layer comprises a stainless steel pressing plate, and the stainless steel pressing plate is connected with the extension part through an anchor bolt;
the repair structure is covered with an anti-corrosive mortar layer.
2. The repairing structure for the box culvert expansion joint as claimed in claim 1, wherein a high-strength mortar layer is arranged between the extension part and the box culvert inner wall, and the end part of the anchor bolt can penetrate through the high-strength mortar layer and is connected with the box culvert inner wall.
3. The repair structure for an expansion joint of a box culvert according to claim 2, wherein the outer surfaces of the first caulking layer and the high-strength mortar layer are aligned; the second caulking layer is aligned with the outer surface of the anti-corrosion mortar layer.
4. The repair structure for an expansion joint of a box culvert according to claim 1, wherein the thickness of the rubber waterstop is 8mm, the width of the bulge is 50mm, the height of the bulge is 40mm, and the length of the extension part is 125 mm.
5. The repair structure for the box culvert expansion joint as claimed in claim 4, wherein a side of the extension part close to the box culvert is provided with a first rib and a second rib with the height of 6mm, the first rib and the bulge part are separated by 80mm, and the second rib and the bulge part are separated by 105 mm.
6. The repair structure for a box culvert expansion joint of claim 1, wherein the stainless steel pressure plate is a 316L stainless steel pressure plate, and the width of the stainless steel pressure plate is 80 mm.
7. The repairing structure for the expansion joint of the box culvert according to claim 1, wherein the expansion joint is provided with a steel mesh at the periphery and coated with a high strength mortar layer, and the ends of the anchor bolts can penetrate through the steel mesh and the high strength mortar layer and are connected with the inner wall of the box culvert.
8. The repairing structure for the expansion joint of the box culvert according to claim 7, wherein a foam board layer is further arranged between the leaking stoppage layer and the waterproof layer.
9. The repair structure for an expansion joint of a box culvert according to claim 8, wherein the outer surfaces of the first caulking layer and the high-strength mortar layer are aligned; the second caulking layer is aligned with the outer surface of the anti-corrosion mortar layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120182309.2U CN215518438U (en) | 2021-01-22 | 2021-01-22 | A repair structure for box culvert expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120182309.2U CN215518438U (en) | 2021-01-22 | 2021-01-22 | A repair structure for box culvert expansion joint |
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| Publication Number | Publication Date |
|---|---|
| CN215518438U true CN215518438U (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120182309.2U Active CN215518438U (en) | 2021-01-22 | 2021-01-22 | A repair structure for box culvert expansion joint |
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| CN (1) | CN215518438U (en) |
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2021
- 2021-01-22 CN CN202120182309.2U patent/CN215518438U/en active Active
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