CN111074848A - Water stop structure for surface layer of expansion joint of hydraulic building and construction method thereof - Google Patents
Water stop structure for surface layer of expansion joint of hydraulic building and construction method thereof Download PDFInfo
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- CN111074848A CN111074848A CN201911302619.7A CN201911302619A CN111074848A CN 111074848 A CN111074848 A CN 111074848A CN 201911302619 A CN201911302619 A CN 201911302619A CN 111074848 A CN111074848 A CN 111074848A
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- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
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- E02B3/16—Sealings or joints
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Abstract
A water stop structure for the surface layer of an expansion joint of a hydraulic structure and a construction method thereof are disclosed, wherein the water stop structure comprises an expansion joint and an elastic water stop strip structure inside the expansion joint; the inner wall of the expansion joint and the building top surfaces at two sides are provided with primer layers, and the elastic water stop strip structure is positioned at the top of the expansion joint; the cross section of the elastic water stop strip structure is rectangular and is provided with a top surface, a bottom surface and two side surfaces; the top surface is provided with a first arc-shaped curved surface structure, and/or the bottom surface is provided with a second arc-shaped curved surface structure; two side surfaces are provided with barb wing-shaped structures extending in the oblique upper direction; the elastic water stop strip structure is internally provided with a hole. The invention has reliable structure and stable stress form, can avoid the problems of sinking, stripping, shearing damage and the like of the expansion joint of the hydraulic building, and prolongs the service life of the hydraulic building.
Description
Technical Field
The invention belongs to the technical field of hydraulic engineering, and particularly relates to a water stop structure for the surface layer of an expansion joint of a hydraulic building and a construction method thereof.
Background
In the existing hydraulic concrete structures, such as water-retaining dams, water gates, aqueducts, tunnels, channels and other water-related projects, because the continuous casting can not be completed once or the concrete expansion caused by temperature change and contraction caused by cold are considered, an expansion joint needs to be arranged during casting, the expansion joint is a part where the leakage of the hydraulic building is easy to occur, the leakage damage not only causes water loss, but also an embedded water-stopping structure such as a rubber water-stopping belt, a copper water-stopping belt and the like is usually arranged in the expansion joint. However, the frequent leakage phenomenon of the embedded water stopping structure is generally shown due to the action of high water pressure and reverse water pressure, construction reasons, environmental reasons and the like. Once the water-stopping structure of the expansion joint is damaged, the water delivery quantity is reduced, and the damages such as collapse of a hydraulic structure main body, frost heaving damage of a foundation, sinking of the foundation and the like can be caused. Therefore, it is necessary to install a water stopping structure on the surface layer of the expansion joint of a newly built or built hydraulic structure. The structure (caulking and surface sealing) and the material of the surface water stop have to meet the functional requirements of the expansion joint, namely, the expansion joint has the characteristics of good durability, adaptability to three-dimensional deformation, strong remodelability, easy repair, high water pressure resistance and the like.
At present, in the operation process of hydraulic buildings, particularly for water delivery tunnels, box culverts, channels, high dams and the like in the large deformation process or under the action of forward and reverse high water pressure, due to the problems of water stop structure design and material durability, the problems of structural damage such as separation of a caulking structure from a telescopic seam wall, collapse and shearing of a surface sealing coating and the like, falling, pulverization, aging durability and the like can occur. In addition, the surface water stopping structure is difficult to repair and transform after being damaged.
Therefore, in order to ensure the safe operation of the engineering, the water stopping structure on the surface layer of the expansion joint has the advantages of high remodelability, easy repair, strong reinforcing capacity, good impermeability, large deformation adaptation, high water pressure resistance and high durability.
Disclosure of Invention
The invention aims to provide a water stop structure for the surface layer of an expansion joint of a hydraulic building and a construction method thereof, which have the advantages of reliable structure and stable stress form and can avoid the problems of sinking, stripping, shearing damage and the like of the expansion joint of the hydraulic building.
In order to achieve the purpose, the invention adopts the following technical scheme:
a water stopping structure for the surface layer of an expansion joint of a hydraulic structure comprises the expansion joint and an elastic water stopping strip structure inside the expansion joint;
the inner wall of the expansion joint and the building top surfaces at two sides are provided with primer layers, and the elastic water stop strip structure is positioned at the top of the expansion joint;
the cross section of the elastic water stop strip structure is rectangular and is provided with a top surface, a bottom surface and two side surfaces; the top surface is provided with a first arc-shaped curved surface structure, and/or the bottom surface is provided with a second arc-shaped curved surface structure; two side surfaces are provided with barb wing-shaped structures extending in the oblique upper direction; the elastic water stop strip structure is internally provided with a hole.
In one embodiment, the cavity is filled with a flowing plastic filler, and a channel is arranged at a position of the side surface corresponding to the top of the cavity, so that the flowing plastic filler flows into a space between the side surface and the inner wall of the expansion joint through the channel.
In one embodiment, the holes are multiple and symmetrical relative to a horizontal plane or a vertical plane; the holes are circular, oval or polygonal; the area of the holes accounts for 30-80% of the area of the cross section of the elastic water stop strip structure, and preferably 50%.
In one embodiment, the included angle between the barb airfoil structure and the side face is 45-90 degrees.
In one embodiment, filler is arranged between the upper and lower adjacent barb wing-shaped structures.
In one embodiment, baffles are arranged on the top surface of the elastic water stop strip structure and extend towards two sides along the horizontal direction, and the two baffles are positioned on the top surfaces of the buildings on two sides of the expansion joint or positioned on the inwards-recessed step part of the inner wall of the expansion joint, so that the top surfaces of the baffles are flush with the top surfaces of the buildings on two sides of the expansion joint; the top of the baffle is of a convex structure, a concave structure or a plane structure.
In one embodiment, the top surface of the elastic water stop strip structure is provided with a sealing coating, and two ends of the sealing coating are fixed in grooves of the building top surface.
In one embodiment, a non-adhesive layer is disposed between the seal coat and the top surface of the elastomeric water stop strip structure.
In one embodiment, the first curved surface structure and the second curved surface structure are both concave structures or convex structures.
A construction method of the water stopping structure for the surface layer of the expansion joint of the hydraulic building comprises the following steps:
(1) grooving at the expansion joint according to the shape of the top surface of the elastic water stop strip structure to form a T-shaped structure, or directly performing the step (2);
(2) cleaning concrete dust and floating slurry on the inner wall and two sides of the expansion joint;
(3) coating a matched priming paint layer of the elastic water stop strip structure, filling flowing plastic filler in the hole according to the structure of the hole of the elastic water stop strip structure, and/or
Fillers are arranged between the barb wing-shaped structures adjacent to the elastic water stop strip structure from top to bottom, and/or
Embedding the elastic water stop strip structure into the expansion joint;
(4) coating a non-bonding layer on the first arc-shaped curved surface structure on the top surface of the elastic water stop strip structure; coating a primer layer matched with the surface sealing coating on the concrete surface on two sides of the top of the expansion joint;
(5) and spraying or brushing a surface sealing coating on the top of the expansion joint.
In one embodiment, the elastic water stop strip structure is made of rubber material, polyurethane material, ethylene propylene diene monomer rubber material or polyurea material; the closed coating is made of polyurethane material or polyurea material; the flowing plastic filler is a GB material or an SR material.
The invention has the beneficial effects that: the water stopping structure for the surface layer of the expansion joint of the hydraulic building has the advantages of reliable structure and stable stress form, can avoid the problems of sinking, stripping, shearing, damage and the like of the expansion joint of the hydraulic building, and prolongs the service life of the hydraulic building.
Drawings
Fig. 1 is a schematic structural view of a water stopping structure used in a surface layer of an expansion joint of a hydraulic structure according to an embodiment 1 of the present invention.
Fig. 1A is a schematic structural view of an elastic water stop strip structure in an embodiment 1 of the water stop structure for a surface layer of an expansion joint of a hydraulic structure according to the present invention.
Fig. 1B is another schematic structural view of an elastic water stop strip structure in an embodiment 1 of the water stop structure for a surface layer of an expansion joint of a hydraulic structure according to the present invention.
Fig. 2 is a schematic structural view of a water stopping structure used in an expansion joint surface layer of a hydraulic structure according to an embodiment 2 of the present invention.
Fig. 3 is a schematic view of the water stopping structure for the surface layer of the expansion joint of the hydraulic structure in the embodiment 3 before being pressed.
Fig. 3A is a schematic view of a water stopping structure for a surface layer of an expansion joint of a hydraulic structure according to an embodiment 3 of the present invention after being pressed.
Fig. 4 is a schematic view of the water stopping structure for the surface layer of the expansion joint of the hydraulic structure in the embodiment 4 before being pressed.
Fig. 4A is a schematic view of a water stopping structure for a surface layer of an expansion joint of a hydraulic structure according to an embodiment 4 of the present invention after being pressed.
Fig. 5 is a schematic structural view of a water stopping structure used in the surface layer of an expansion joint of a hydraulic structure according to an embodiment 5 of the present invention.
Fig. 5A is a schematic structural view of an elastic water stop strip structure in an embodiment 5 of the water stop structure for a surface layer of an expansion joint of a hydraulic structure according to the present invention.
Fig. 5B is another schematic structural view of the elastic water stop strip structure in the embodiment 5 of the water stop structure for the surface layer of the expansion joint of the hydraulic structure of the present invention.
Fig. 5C is another schematic structural view of an elastic water stop strip structure in the embodiment 5 of the water stop structure for the surface layer of an expansion joint of a hydraulic structure of the present invention.
Fig. 6 is a schematic view of a water stopping structure for the surface layer of an expansion joint of a hydraulic structure according to an embodiment 6 of the present invention before tension.
Fig. 6A is a schematic view of a water stopping structure used in the surface layer of an expansion joint of a hydraulic structure according to an embodiment 6 of the present invention after being pulled.
Fig. 7 is a schematic view of the water stopping structure used in the surface layer of the expansion joint of the hydraulic structure according to embodiment 7 before being pulled.
Fig. 7A is a schematic view of the water stopping structure used in the surface layer of the expansion joint of the hydraulic structure according to embodiment 7 after being pulled.
Fig. 8 is a schematic structural view of a water stopping structure used in the surface layer of an expansion joint of a hydraulic structure according to an embodiment 8 of the present invention.
Fig. 9 is a schematic structural view of a water stopping structure used in the surface layer of an expansion joint of a hydraulic structure according to an embodiment 9 of the present invention.
Detailed Description
In order to make the technical scheme and the beneficial effects of the invention more clearly understood, the invention is further described in detail below with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, an embodiment 1 of a water stop structure for a surface layer of an expansion joint of a hydraulic structure according to the present invention includes an expansion joint 1 and an elastic water stop structure 2 inside the expansion joint 1. The elastic water stop strip structure 2 is made of rubber materials, polyurethane materials, ethylene propylene diene monomer rubber materials or polyurea materials.
The inner wall of the expansion joint 1 and the building top surfaces 3 at the two sides are provided with primer layers, and the elastic water stop strip structure 2 is positioned at the top of the expansion joint 1. The flexible water stop strip structure 2 is rectangular in cross section, having a top surface 21, a bottom surface 22 and two side surfaces 23. The top surface 21 has a first curved surface structure 211, and the bottom surface 22 has a second curved surface structure 221. Two sides 23 are equipped with barb airfoil structure 231 that the direction extends to one side, and barb airfoil structure 231 is 45 ~ 90 with the contained angle of side. The elastic water stop strip structure 2 is internally provided with a plurality of holes 4 which are symmetrical relative to a horizontal plane or a vertical plane. In this embodiment, the first arc-shaped curved surface structure 211 and the second arc-shaped curved surface structure 221 are both concave structures, and of course, may also be convex structures. In this embodiment, the top surface 21 of the elastic water stop strip structure 2 is flush with the building top surfaces 3 at both sides of the expansion joint 1.
As shown in fig. 1A and 1B, in addition to the polygonal shape shown in fig. 1, the holes 4 of the elastic water stop strip structure 2 of the present invention may be elliptical and symmetrically arranged. The area of the holes of the elastic water stop strip structure 2 accounts for 30-80%, preferably 50% of the area of the cross section of the elastic water stop strip structure.
As shown in fig. 2, it is an embodiment 2 of the water stopping structure on the surface layer of the expansion joint of the hydraulic structure of the present invention, which is different from embodiment 1 in that the top surface of the elastic water stopping strip structure 2 is provided with a sealing coating 5, the sealing coating 5 is made of polyurethane material or polyurea material, the shape corresponds to the top surface of the elastic water stopping strip structure 2, and both ends of the sealing coating 5 are fixed in the grooves 31 of the building top surface 3. Further, a non-adhesive layer 6 is arranged between the seal coating 5 and the top surface of the elastic water stop strip structure 2.
As shown in fig. 3, it is an embodiment 3 of the water stop structure on the surface layer of the expansion joint of the hydraulic structure of the present invention, which is different from embodiment 2 in that the inside of the hole 4 is filled with the flowing plastic filler 41, the side surface 23 is provided with a channel 42 corresponding to the top of the hole 4, so that the flowing plastic filler 41 flows into between the side surface 23 and the inner wall of the expansion joint 1 through the channel 42. Fig. 3 shows the whole structure of this embodiment before being pressed, and in fig. 3A, the whole structure of this embodiment flows the plastic filler 41 under the pressure to be squeezed out, and is blocked between the barb airfoil structure and the inner wall of the expansion joint, so as to form a compact water stop structure.
As shown in fig. 4, it is an embodiment 4 of the water stopping structure on the surface layer of the expansion joint of the hydraulic structure of the present invention, and the difference from the embodiment 3 is that the holes 4 of the elastic water stopping strip structure 2 of the present invention are diamond-shaped and symmetrically arranged. Fig. 4 shows the whole structure of this embodiment before being pressed, and in fig. 4A, the whole structure of this embodiment flows the plastic packing 41 to be extruded out under the pressure, and is blocked between the barb wing-shaped structure and the inner wall of the expansion joint, so as to form a compact water stop structure.
As shown in fig. 5, which is an embodiment 5 of the present invention, in this embodiment, the difference from embodiment 2 is that baffles 24 are provided on the top surface of the elastic water stop strip structure 2 extending to both sides along the horizontal direction, so that the elastic water stop strip structure 2 is T-shaped, and the two baffles 24 are located on the inwardly recessed step portion 11 of the inner wall of the expansion joint 1, so that the top surfaces of the baffles 24 are flush with the building top surfaces 3 on both sides of the expansion joint 1. The shape of the seal coat 5 corresponds to the top surface of the elastic water stop strip structure 2 and the baffle 24. The top of the baffle 24 may be convex, concave, or planar.
As shown in fig. 5A, 5B, and 5C, in addition to the polygon in fig. 5, the holes 4 of the elastic water stop strip structure 2 of the present invention may be elliptical or diamond-shaped and symmetrically arranged.
As shown in fig. 6, which is an embodiment 6 of the present invention, in this embodiment, the difference from the embodiment 5 is that the cavity 4 is filled with a flowing plastic filler 41 inside two side surfaces, a channel 42 is provided at a position of the side surface 23 corresponding to the top of the cavity 4, so that the flowing plastic filler 41 flows into between the side surface 23 and the inner wall of the expansion joint 1 through the channel 42.
Fig. 6 shows the whole structure of this embodiment before being pulled, and in fig. 6A, the whole structure of this embodiment flows the plastic filler 41 under the action of the tension to be extruded out, and is blocked between the barb wing-shaped structure and the inner wall of the expansion joint, so as to form a compact water stop structure.
As shown in fig. 7, it is an embodiment 7 of the present invention, which is different from the embodiment 6 in that the holes 4 are diamond-shaped. Fig. 7 shows the whole structure of this embodiment before being pressed, and in fig. 7A, the whole structure of this embodiment flows the plastic filler 41 to be extruded out under the pressure, and is blocked between the barb wing-shaped structure and the inner wall of the expansion joint, so as to form a compact water stop structure.
As shown in fig. 8, it is an embodiment 8 of the present invention, and in this embodiment, it is different from embodiment 5 in that the baffle 24 is located on the building top surface 3 at both sides of the expansion joint and is higher than the building top surface 3.
As shown in fig. 9, it is an embodiment 9 of the present invention, and in this embodiment, it is different from embodiment 6 in that the baffle 24 is located on the building top surface 3 at both sides of the expansion joint and is higher than the building top surface 3.
The invention also provides a construction method of the water stopping structure for the surface layer of the expansion joint of the hydraulic building, which comprises the following steps:
(1) grooving at the expansion joint according to the shape of the top surface of the elastic water stop strip structure to form a T-shaped structure, or directly performing the step (2);
(2) cleaning concrete dust and floating slurry on the inner wall and two sides of the expansion joint;
(3) coating a matched priming paint layer of the elastic water stop strip structure, filling flowing plastic filler in the hole according to the structure of the hole of the elastic water stop strip structure, and/or
Fillers are arranged between the barb wing-shaped structures adjacent to the elastic water stop strip structure from top to bottom, and/or
Embedding the elastic water stop strip structure into the expansion joint;
(4) coating a non-bonding layer on the first arc-shaped curved surface structure on the top surface of the elastic water stop strip structure; coating a primer layer matched with the surface sealing coating on the concrete surface on two sides of the top of the expansion joint;
(5) and spraying or brushing a surface sealing coating on the top of the expansion joint.
The elastic water stop strip structure 2 is made of rubber materials, polyurethane materials, ethylene propylene diene monomer rubber materials or polyurea materials; the seal coating 5 is made of polyurethane material or polyurea material; the flowing plastic filler 41 is a GB material, or an SR material.
The first arc-shaped curved surface structure 211 and the second arc-shaped curved surface structure 221 of the elastic water stop strip structure have the function of reducing water pressure, so that the water stop structure can be prevented from being damaged; barb airfoil structure 231 of elastic water stop strip structure 2 can conveniently be under construction, only need with elastic water stop strip structure 2 impress in the expansion joint 1 can. The hole 4 of the invention can also be filled with a flowing plastic filler 41, and when the expansion joint 1 bears forward or reverse or expansion deformation, the filling material is extruded between the side surface 23 and the inner wall of the expansion joint 1 to prevent water seepage. The water stopping structure for the surface layer of the expansion joint of the hydraulic building has the advantages of reliable structure and stable stress form, can avoid the problems of sinking, stripping, shearing, damage and the like of the expansion joint of the hydraulic building, and prolongs the service life of the hydraulic building.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. A water stopping structure for the surface layer of an expansion joint of a hydraulic building is characterized by comprising an expansion joint and an elastic water stopping strip structure inside the expansion joint;
the inner wall of the expansion joint and the building top surfaces at two sides are provided with primer layers, and the elastic water stop strip structure is positioned at the top of the expansion joint;
the cross section of the elastic water stop strip structure is rectangular and is provided with a top surface, a bottom surface and two side surfaces; the top surface is provided with a first arc-shaped curved surface structure, and/or the bottom surface is provided with a second arc-shaped curved surface structure; two side surfaces are provided with barb wing-shaped structures extending in the oblique upper direction; the elastic water stop strip structure is internally provided with a hole.
2. The water stopping structure for the surface layer of the expansion joint of the hydraulic structure as claimed in claim 1, wherein: the hole is filled with the flowing plastic filler, and a channel is arranged at the position, corresponding to the top of the hole, of the side surface, so that the flowing plastic filler flows into the space between the side surface and the inner wall of the expansion joint through the channel.
3. The water stopping structure for the surface layer of the expansion joint of the hydraulic structure as claimed in claim 1 or 2, wherein: the number of the holes is multiple, and the holes are symmetrical relative to a horizontal plane or a vertical plane; the holes are circular, oval or polygonal; the area of the hole accounts for 30-80% of the area of the section of the elastic water stop strip structure.
4. The water stopping structure for the surface layer of the expansion joint of the hydraulic structure as claimed in claim 1 or 2, wherein: the top surface of the elastic water stop strip structure extends towards two sides along the horizontal direction and is provided with a baffle plate, the two baffle plates are positioned on the top surfaces of the buildings at two sides of the expansion joint, or the two baffle plates are positioned on the inwards sunken step part of the inner wall of the expansion joint, so that the top surfaces of the baffle plates are level with the top surfaces of the buildings at two sides of the expansion joint; the top of the baffle is of a convex structure, a concave structure or a plane structure.
5. The water stopping structure for the surface layer of the expansion joint of the hydraulic structure as claimed in claim 4, wherein: barb airfoil structure with the contained angle of side is 45 ~ 90, is equipped with the filler between the barb airfoil structure adjacent from top to bottom.
6. The water stopping structure for the surface layer of the expansion joint of the hydraulic structure as claimed in claim 4, wherein: the top surface of the elastic water stop strip structure is provided with a sealing coating, and two ends of the sealing coating are fixed in the grooves of the top surface of the building.
7. The water stopping structure for the surface layer of the expansion joint of the hydraulic structure as claimed in claim 6, wherein: and a non-bonding layer is arranged between the seal coating and the top surface of the elastic water stop strip structure.
8. The water stopping structure for the surface layer of the expansion joint of the hydraulic structure as claimed in claims 1 and 2, wherein: the first arc-shaped curved surface structure and the second arc-shaped curved surface structure are both concave structures or convex structures.
9. A construction method of a water stopping structure for a surface layer of an expansion joint of a hydraulic structure as claimed in any one of claims 1 to 8, comprising the steps of:
(1) grooving at the expansion joint according to the shape of the top surface of the elastic water stop strip structure to form a T-shaped structure, or directly performing the step (2);
(2) cleaning concrete dust and floating slurry on the inner wall and two sides of the expansion joint;
(3) coating a matched priming paint layer of the elastic water stop strip structure, filling flowing plastic filler in the hole according to the structure of the hole of the elastic water stop strip structure, and/or
Fillers are arranged between the barb wing-shaped structures adjacent to the elastic water stop strip structure from top to bottom, and/or
Embedding the elastic water stop strip structure into the expansion joint;
(4) coating a non-bonding layer on the first arc-shaped curved surface structure on the top surface of the elastic water stop strip structure; coating a primer layer matched with the surface sealing coating on the concrete surface on two sides of the top of the expansion joint;
(5) and spraying or brushing a surface sealing coating on the top of the expansion joint.
10. The construction method of a water stopping structure for a surface layer of an expansion joint of a hydraulic structure as claimed in claim 9, wherein: the elastic water stop strip is made of rubber materials, polyurethane materials, ethylene propylene diene monomer rubber materials or polyurea materials; the closed coating is made of polyurethane material or polyurea material; the flowing plastic filler is a GB material or an SR material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911302619.7A CN111074848A (en) | 2019-12-17 | 2019-12-17 | Water stop structure for surface layer of expansion joint of hydraulic building and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911302619.7A CN111074848A (en) | 2019-12-17 | 2019-12-17 | Water stop structure for surface layer of expansion joint of hydraulic building and construction method thereof |
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| CN111074848A true CN111074848A (en) | 2020-04-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541332A (en) * | 2022-02-21 | 2022-05-27 | 福建江隆水利水电工程有限公司 | River course slope protection surface cast-in-place concrete expansion joint structure and construction method thereof |
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2019
- 2019-12-17 CN CN201911302619.7A patent/CN111074848A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541332A (en) * | 2022-02-21 | 2022-05-27 | 福建江隆水利水电工程有限公司 | River course slope protection surface cast-in-place concrete expansion joint structure and construction method thereof |
| CN114541332B (en) * | 2022-02-21 | 2024-03-19 | 福建江隆水利水电工程有限公司 | River channel slope protection surface cast-in-place concrete expansion joint structure and construction method thereof |
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