Aqueduct expansion device and aqueduct expansion joint structure
By designing an aqueduct telescopic device including inserts, elastic supports, pressure-bearing plates and telescopic waterstops, the problem of insufficient bearing capacity and allowable displacement in the existing technology is solved, and high water pressure and large displacement are achieved. Quantitative adaptability, suitable for engineering applications of large aqueducts.
Patent Information
- Application Number
- CN202323669549.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2033-12-29
AI Technical Summary
The existing aqueduct telescopic devices have shortcomings in terms of bearing capacity and allowable displacement, and it is difficult to meet the requirements of high water pressure and large displacement of large aqueducts.
An aqueduct telescopic device including inlays, elastic supports, pressure-bearing plates and telescopic waterstops is used. The inlays are C-shaped strip structures. The elastic supports and pressure-bearing plates are combined with the inlays. The telescopic waterstops are glued It is connected to the pressure-bearing plate, and a secondary sealing waterstop is set between the embedded parts to enhance the sealing effect.
The aqueduct telescopic device achieves high bearing capacity and large displacement, can withstand higher water pressure, and provides a mechanical connection method for easy maintenance and replacement on the structure.
Smart Images
Figure CN222375179U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of water conservancy projects, in particular to an aqueduct expansion device which is used for being installed at the joint of an aqueduct and plays a sealing role, and also in particular to an aqueduct expansion joint structure. Background Art
[0002] With the continuous development and improvement of water conservancy engineering construction in my country, aqueducts, as engineering buildings that can effectively regulate the balance of water resources between regions, are increasingly used in actual projects. Aqueducts, also known as water bridges, are mainly used to transport water across rivers, valleys, depressions, roads, etc. Large aqueducts mainly use reinforced concrete structures. The main body of the aqueduct will expand and contract under temperature changes. In order to prevent cracks and damage to the structure of the main body of the aqueduct, gaps of a certain size are often reserved at certain distances along the length of the aqueduct, and expansion joint devices are set at the gaps to make the main body of the aqueduct retractable along the length. At the same time, the aqueduct expansion joint device must also have a water-stopping function. If it does not have a water-stopping function, after the aqueduct leaks, acidic and alkali corrosive substances will react chemically with the concrete at the end of the beam at the expansion joint, resulting in loose concrete and peeling, and corrosion of the structural steel bars.
[0003] Commonly used aqueduct expansion joint devices include adhesive, embedded, and filler types. In the adhesive aqueduct expansion joint device, the deformable rubber waterstop is attached to the concrete at both ends of the reserved gap with an adhesive and pressed tightly. The surface of the waterstop is protected by backfill protective mortar, such as asphalt, mortar, etc. In the embedded aqueduct expansion joint device, the rubber or plastic waterstop is embedded in the wall and floor concrete on both sides of the reserved gap. In the filler aqueduct expansion joint device, a variety of materials, such as polyurethane sealant, high elastic polyurea mortar, asphalt mortar, etc., are embedded in the reserved gap to achieve the purpose of adapting to deformation and waterproofing. In the actual engineering application, the adhesive aqueduct expansion joint device requires multi-level bonding, which has high requirements for bonding construction and is difficult to guarantee the construction quality. In the process of embedding the embedded aqueduct expansion joint device, the concrete near the embedding point must be vibrated in place, otherwise it is easy to cause bypass seepage; at the same time, once the waterstop is damaged, it is difficult to repair and replace it, and the concrete needs to be chiseled out. The filler-type aqueduct expansion joint device mainly relies on the bonding between the filler and concrete to achieve the purpose of water stopping. Before filling, the concrete bonding surface needs to be cleaned, and the construction quality is not easy to guarantee. At the same time, due to the limited expansion and contraction performance of the filler, the filler type is not suitable for large aqueducts that need to adapt to large displacement conditions. Utility Model Content
[0004] The first technical problem to be solved by the utility model is to provide an aqueduct expansion and contraction device with high bearing capacity and large allowable displacement.
[0005] The technical solution adopted in the present invention is: an aqueduct expansion and contraction device, comprising two embedded parts, the embedded parts are strip-shaped structures, the embedded parts are C-shaped in their cross-section, the openings of the two embedded parts are arranged opposite to each other, elastic supports are fixedly arranged in the openings of the two embedded parts respectively, a pressure plate is fixedly arranged between the two elastic supports, the pressure plate and the elastic support are respectively abutted against the two sides of the openings of the two embedded parts, a expansion waterstop is arranged on the side of the pressure plate facing away from the elastic support, and the two sides of the expansion waterstop are respectively sealed and fixed to one side of the openings of the two embedded parts.
[0006] In order to ensure the strength of the embedded parts themselves and ensure the stability of the embedded parts after being installed by mortar, further: the embedded parts are made of metal, and bolts are fixedly arranged on the outer side of the embedded parts.
[0007] In order to fix the telescopic water stop to the pressure plate, the telescopic water stop and the pressure plate are further connected by bonding through a point-shaped or line-shaped bonding area. For example, a first connection block is bonded to one side of the telescopic water stop facing the elastic support, and the first connection block is fixed to the pressure plate by bolts.
[0008] In order to protect the telescopic water stop, further: the side of the telescopic water stop facing away from the elastic support is also fixedly connected with a slag stop plate. For example, the side of the telescopic water stop facing away from the elastic support is bonded with a second connection block, and the slag stop plate is fixedly connected to the second connection block by bolts, and the slag stop plate completely covers the telescopic water stop.
[0009] In order to prevent the expansion and contraction of the telescopic waterstop from causing wear between the telescopic waterstop and the pressure plate, a wear-resistant plate is fixedly arranged on the side of the telescopic waterstop facing the pressure plate. For example, a wear-resistant plate is pasted and fixed on the side of the telescopic waterstop facing the pressure plate, and the wear-resistant plate is a polytetrafluoroethylene plate.
[0010] The telescopic waterstop can expand and contract and deform, and play a sealing role. Specifically: the telescopic waterstop is a pleated rubber.
[0011] Furthermore, the elastic support is made of rubber material, and circular shafts are respectively arranged at both ends of the elastic support, and axial holes are respectively arranged in the openings of the two embedded parts, and an axial hole is arranged on the side of the pressure plate facing away from the telescopic water stop belt. The circular shafts at both ends of the elastic support are respectively connected to the axial holes of the embedded part and the axial holes of the pressure plate and are glued and fixed.
[0012] In order to ensure the sealing effect between the two embedded parts, further: a secondary sealing water stop is provided between the two embedded parts, the secondary sealing water stop is located on the side of the pressure plate facing away from the telescopic water stop, and the two sides of the secondary sealing water stop are respectively sealed and fixed to one side of the opening of the two embedded parts. For example, the secondary sealing water stop is fixed to the embedded part by a pressure plate and bolts.
[0013] The secondary sealing waterstop can expand and contract and deform, and play a sealing role. Specifically: the secondary sealing waterstop is a rubber belt.
[0014] In order to avoid leakage problems caused by the telescopic waterstop being fixed to both sides of the embedded part, further: the telescopic waterstop is fixed to the embedded part by a pressure plate and bolts, and the pressure plate and the bolts are located on the side of the opening facing away from the embedded part.
[0015] The beneficial effects of the aqueduct expansion and contraction device of the utility model are as follows: the elastic support itself has a certain deformation, and no matter whether the two embedded parts have relative displacement or not, the pressure plate always supports the expansion and contraction waterstop, avoiding the fixed middle part of the two sides of the expansion and contraction waterstop from being suspended in the air, so that the expansion and contraction waterstop can withstand a larger force directed from the expansion and contraction waterstop to the bearing plate and perpendicular to the pressure plate, that is, the aqueduct expansion and contraction device can withstand higher water pressure, thereby meeting the high water pressure requirements of large aqueducts. The pressure plate always supports the expansion and contraction waterstop, and the expansion and contraction waterstop can make full use of its own upper expansion and contraction deformation to increase the allowable displacement between the two embedded parts, thereby meeting the large allowable displacement requirements of large aqueducts. The aqueduct expansion and contraction device can adopt a variety of mechanical connection methods to facilitate later replacement and maintenance.
[0016] The utility model also provides an aqueduct expansion joint structure, the purpose of which is to improve the bearing capacity and allowable displacement at the expansion joint. The aqueduct expansion joint structure, the two sections of the aqueduct are connected by any of the above-mentioned aqueduct expansion devices, the inner sides of the connecting ends of the two sections of the aqueduct are respectively provided with connecting grooves, two embedded parts are respectively fixed in the connecting grooves of the two sections of the aqueduct by mortar, the openings of the embedded parts face the joint of the two sections of the aqueduct, and the expansion water stop is located on the side of the pressure plate close to the inner side of the aqueduct.
[0017] Specifically: a connection groove with an L-shaped cross section is arranged at the connection end of the aqueduct, the inner wall of the connection groove is a rough surface that has been roughened, and the mortar is acrylic emulsion mortar.
[0018] The beneficial effects of the aqueduct expansion joint structure of the utility model are: the allowable displacement between the two sections of the aqueduct is large, the expansion and contraction deformation capacity is strong, and the allowable displacement can reach more than 160mm. The expansion joint structure of the aqueduct can withstand higher water pressure, and the theoretical pressure bearing capacity of the pressure plate can reach 140MPa, which fully meets the high water pressure requirements of large aqueducts. The on-site construction of the aqueduct expansion joint structure is fast and convenient, and the construction difficulty is low. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the aqueduct expansion joint structure of the utility model.
[0020] Figure 2 yes Figure 1 The illustrated embodiment is a schematic diagram of the aqueduct expansion and contraction device for separating two aqueduct sections when the device is stretched.
[0021] Figure 3 yes Figure 1 The illustrated embodiment is a schematic diagram of two aqueduct sections when they are compressed near the aqueduct expansion and contraction device.
[0022] Figure numerals: embedded part 1, elastic support 2, pressure plate 3, telescopic waterstop 4, bolt 5, slag retaining plate 6, wear-resistant plate 7, secondary sealing waterstop 8, aqueduct 9, mortar 10, first connecting block 11, second connecting block 12. DETAILED DESCRIPTION
[0023] The utility model will be further described below in conjunction with the accompanying drawings.
[0024] See also Figures 1 to 3 The first subject of the utility model is an aqueduct expansion device, which is used to be installed between the joints of two sections of aqueduct 9 to achieve sealing between the two sections of aqueduct 9. An aqueduct expansion device includes two embedded parts 1, which are used to be fixedly installed on the connecting end of the aqueduct 9 and transmit structural force. The embedded part 1 is a strip structure, that is, the overall shape of the embedded part 1 is consistent with the shape of the connecting end of the aqueduct 9. In order to ensure the strength of the embedded part 1 itself, the embedded part 1 is made of metal, for example, the embedded part 1 is made of steel. Since the embedded part 1 needs to be fixedly installed on the connecting end of the aqueduct 9 through mortar 10, in order to make the embedded part 1 and the mortar 10 more firmly combined to ensure the stability of the embedded part 1 relative to the aqueduct 9, a bolt 5 is fixedly arranged on the outside of the embedded part 1. The bolt 5 is a short steel bar, or a bolt. There are multiple bolts 5, and each bolt 5 is generally welded and fixed to the outside of the embedded part 1. The embedded part 1 is C-shaped in its cross section, and the openings of the two embedded parts 1 are arranged opposite to each other. Elastic supports 2 are fixedly arranged in the openings of the two embedded parts 1, respectively. A pressure plate 3 is fixedly arranged between the two elastic supports 2. The two elastic supports 2 are fixed to one surface of the pressure plate 3. The pressure plate 3 and the elastic supports 2 are respectively abutted against both sides of the openings of the two embedded parts 1.
[0025] In order to adapt to the expansion and contraction deformation between the two embedded parts 1, the elastic support 2 is made of an elastic material, generally a rubber material, and the elastic support 2 makes the deformation of both sides of the aqueduct expansion and contraction device uniform. The elastic support 2 is fixed to the embedded part 1, and the pressure plate 3 is fixed to the elastic support 2, so that the three are relatively fixed, and the two embedded parts 1 can expand and contract and deform. In order not to affect the deformation of the elastic support 2, circular shafts are respectively provided at both ends of the elastic support 2, and axial holes are respectively provided in the openings of the two embedded parts 1, and an axial hole is also provided on the side of the pressure plate 3 facing away from the expansion and contraction water stop 4. The circular shafts at both ends of the elastic support 2 are respectively adapted to the axial holes of the embedded part 1 and the axial holes of the pressure plate 3, and the circular shafts at both ends of the elastic support 2 are respectively inserted into the axial holes of the embedded part 1 and the axial holes of the pressure plate 3 and fixed by bonding.
[0026] A telescopic waterstop 4 is provided on the side of the pressure plate 3 facing away from the elastic support 2, and the two sides of the telescopic waterstop 4 are respectively sealed and fixed to one side of the opening of the two embedded parts 1. The pressure plate 3 enables the telescopic waterstop 4 to withstand a large force, which is directed from the telescopic waterstop 4 to the bearing plate and is perpendicular to the pressure plate 3, that is, the telescopic waterstop 4 can withstand a higher water pressure, thereby meeting the high water pressure requirements of large aqueducts. The telescopic waterstop 4 can be telescopically deformed, providing telescopic deformation capabilities for the two sections of the aqueduct 9, and plays a sealing role. The telescopic waterstop 4 is generally a pleated rubber. In order for the telescopic waterstop 4 to be fixed to the pressure plate 3, the telescopic waterstop 4 is bonded to the pressure plate 3 through a point-shaped or line-shaped bonding area. It is best not to completely fix the telescopic waterstop 4 to the pressure plate 3 to avoid affecting the deformation of the telescopic waterstop 4. For example, the first connecting block 11 is bonded to the side of the telescopic waterstop 4 facing the elastic support 2, and the first connecting block 11 is fixed to the pressure plate 3 by bolts. For another example, when the telescopic waterstop 4 is made of rubber, the first connecting block 11 can be vulcanized and bonded to the telescopic waterstop 4. In order to avoid wear between the telescopic waterstop 4 and the pressure plate 3 due to the expansion and contraction changes of the telescopic waterstop 4, a wear-resistant plate 7 is fixedly arranged on the side of the telescopic waterstop 4 facing the pressure plate 3. The wear-resistant plate 7 is preferably glued and fixed to the side of the telescopic waterstop 4 facing the pressure plate 3 to avoid damage to the telescopic waterstop 4 caused by the fixed wear-resistant plate 7. For example, the wear-resistant plate 7 is a polytetrafluoroethylene plate. As a polymer wear-resistant material, polytetrafluoroethylene can improve the durability of the telescopic waterstop 4. In order to avoid leakage problems on both sides of the telescopic waterstop 4 fixed to the embedded part 1, the telescopic waterstop 4 is fixed to the embedded part 1 by a pressure plate and bolts. The pressure plate and bolts for fixing the telescopic waterstop 4 can be located at any position of the embedded part 1, preferably on the side facing away from the opening of the embedded part 1, so that the mortar 10 can submerge the pressure plate and bolts to improve the waterproof effect.
[0027] In order to ensure the sealing effect between the two embedded parts 1, a secondary sealing waterstop 8 is also arranged between the two embedded parts 1. The secondary sealing waterstop 8 is located on the side of the pressure plate 3 facing away from the telescopic waterstop 4. Both sides of the secondary sealing waterstop 8 are sealed and fixed to one side of the opening of the two embedded parts 1. The secondary sealing waterstop 8 can be telescopically deformed, and is a safety waterproof measure to prevent leakage. The secondary sealing waterstop 8 can also be a rubber belt. For example, the secondary sealing waterstop 8 is fixed to the embedded part 1 by a pressure plate and bolts, and the pressure plate and bolts fixing the secondary sealing waterstop 8 are located between the two elastic supports 2.
[0028] In order to protect the telescopic water stop 4, prevent sharp objects from damaging the telescopic water stop 4, and improve the durability of the aqueduct telescopic device, the telescopic water stop 4 is also fixedly connected to the side of the telescopic water stop 4 facing away from the elastic support 2 with a slag retaining plate 6. The slag retaining plate 6 is preferably a metal plate, such as brass or stainless steel. For example, the side of the telescopic water stop 4 facing away from the elastic support 2 is bonded to the second connecting block 12, and the slag retaining plate 6 is fixedly connected to the second connecting block 12 by bolts, and the slag retaining plate 6 completely covers the telescopic water stop 4.
[0029] The second subject of the utility model is an aqueduct expansion joint structure. Figures 1 to 3 As shown, the aqueduct expansion joint structure, the two sections of aqueduct 9 are connected by the above-mentioned aqueduct expansion device. The inner sides of the connecting ends of the two sections of aqueduct 9 are respectively provided with connecting grooves, and the connecting grooves are used to install the aqueduct expansion device. The two embedded parts 1 of the aqueduct expansion device are respectively fixed in the connecting grooves of the two sections of aqueduct 9 by mortar 10. The thickness of the aqueduct 9 is sufficient to install the aqueduct expansion device. In order to facilitate the installation of the aqueduct expansion device, the connecting end of the aqueduct 9 is provided with a connecting groove with an L-shaped cross-section. The inner wall of the connecting groove is a rough surface that is roughened to facilitate the firm combination of the mortar 10 and the aqueduct 9. For example, the mortar 10 can be made of acrylic mortar, which belongs to a high molecular polymer emulsion modified cement mortar, and has the advantages of excellent bonding, crack resistance, waterproofness, and aging resistance. The life span of long-term immersion in water is more than 50 years, which plays the role of filling the connecting groove, leveling the aqueduct expansion device, and bonding the embedded parts 1 to the aqueduct 9. The opening of the embedded part 1 faces the joint of the two sections of the aqueduct 9, and the telescopic waterstop 4 is located on the side of the pressure plate 3 close to the inner side of the aqueduct 9, so that the telescopic waterstop 4 can withstand higher water pressure with the help of the pressure plate 3.
[0030] When the two sections of aqueduct 9 show a tendency of stretching and compression at the joint due to temperature changes, the aqueduct 9 transfers the force to the embedded part 1 through the mortar 10, and the embedded part 1 transfers the force to the expansion water stop 4 and the elastic support 2, and then to the pressure plate 3 at the same time. During the overall force-bearing process, the expansion and contraction deformation of the aqueduct expansion and contraction device is completed by the elastic support 2, the expansion water stop 4 and the secondary sealing water stop 8.
Claims
1. An aqueduct expansion device, characterized in that: The invention comprises two embedded parts (1), the embedded parts (1) are strip-shaped structures, the cross section of the embedded parts (1) is C-shaped, the openings of the two embedded parts (1) are arranged opposite to each other, elastic supports (2) are respectively fixedly arranged in the openings of the two embedded parts (1), a pressure plate (3) is fixedly arranged between the two elastic supports (2), the pressure plate (3) and the elastic support (2) are respectively abutted against the two sides of the openings of the two embedded parts (1), a telescopic water stop strip (4) is arranged on the side of the pressure plate (3) facing away from the elastic support (2), and the two sides of the telescopic water stop strip (4) are respectively sealed and fixed to the one side of the openings of the two embedded parts (1).
2. The aqueduct expansion device according to claim 1, characterized in that: The embedded part (1) is made of metal, and a bolt (5) is fixedly arranged on the outer side of the embedded part (1).
3. The aqueduct expansion device according to claim 1, characterized in that: The telescopic water stop strip (4) and the pressure plate (3) are bonded and connected via a point-shaped or line-shaped bonding area.
4. The aqueduct expansion device according to claim 1, characterized in that: The side of the telescopic water stop strip (4) facing away from the elastic support (2) is also fixedly connected to a slag blocking plate (6).
5. The aqueduct expansion device according to claim 1, characterized in that: A wear-resistant plate (7) is fixedly arranged on one side of the telescopic water stop strip (4) facing the pressure plate (3).
6. The aqueduct expansion device according to claim 1, characterized in that: The elastic support (2) is made of rubber, and circular shafts are respectively arranged at both ends of the elastic support (2). Axial holes are respectively arranged in the openings of the two embedded parts (1). An axial hole is arranged on the side of the pressure plate (3) facing away from the telescopic water stop belt (4). The circular shafts at both ends of the elastic support (2) are respectively connected to the axial holes of the embedded part (1) and the axial holes of the pressure plate (3) and are fixed by bonding.
7. The aqueduct expansion device according to claim 1, characterized in that: A secondary sealing waterstop (8) is also provided between the two embedded components (1). The secondary sealing waterstop (8) is located on the side of the pressure plate (3) facing away from the telescopic waterstop (4). Both sides of the secondary sealing waterstop (8) are respectively sealed and fixed to one side of the opening of the two embedded components (1).
8. The aqueduct expansion device according to claim 1, characterized in that: The telescopic water stop strip (4) is fixed to the embedded part (1) via a pressure plate and bolts, and the pressure plate and the bolts are located on the side of the opening facing away from the embedded part (1).
9. Aqueduct expansion joint structure, characterized by: The two sections of aqueduct (9) are connected by an aqueduct expansion and contraction device as described in any one of claims 1 to 8 above, and connecting grooves are respectively arranged on the inner sides of the connecting ends of the two sections of aqueduct (9), and two embedded parts (1) are respectively fixed in the connecting grooves of the two sections of aqueduct (9) by mortar (10), and the opening of the embedded parts (1) faces the connecting end of the aqueduct (9), and the expansion and contraction water stop (4) is located on the side of the pressure plate (3) close to the inner side of the aqueduct (9).
10. The aqueduct expansion joint structure according to claim 9, characterized in that: The connection end of the aqueduct (9) is provided with a connection groove with an L-shaped cross section, the inner wall of the connection groove is a rough surface that has been roughened, and the mortar (10) is acrylic mortar.