Low-temperature adaptability reinforcement structure for joint waterstops in arid and cold regions of panel dams

Abstract

This utility model relates to the field of seepage prevention structure technology in water conservancy engineering, specifically disclosing a low-temperature adaptable reinforcement structure for the joint waterstop of a panel dam in arid and cold regions. It includes: a concrete panel, which forms the main body of the panel dam and serves as the foundational load-bearing component of the waterstop structure; a seepage-proof base is fixedly installed at the joint between the concrete panels, and the surface of the seepage-proof base has a bottom arc-shaped waterstop section; the seepage-proof base and the bottom arc-shaped waterstop section constitute the main waterstop body of the foundation. In this low-temperature adaptable reinforcement structure for the joint waterstop of a panel dam in arid and cold regions, the middle layer of the composite main waterstop's metal reinforcement skeleton enhances tear resistance and resists tensile forces generated by dam shrinkage or earthquakes. Its inner layer of metal nails is embedded in the waterstop base plate for fixation, preventing low-temperature deformation from causing the waterstop to peel off from the base plate. Simultaneously, the disc springs within the circular grooves on the outer wall of the composite main waterstop can compensate for lateral displacement caused by low-temperature shrinkage of the concrete panel through elastic deformation.

Description

Technical Field

[0001] This utility model relates to the field of anti-seepage structure technology in water conservancy projects, specifically to a low-temperature adaptable reinforcement structure for the joint waterstop of panel dams in arid and cold regions. Background Technology

[0002] In water conservancy projects in arid and cold regions, concrete-faced rockfill dams are a commonly used type of dam. The joint waterstop is the core component that ensures the seepage prevention function of the dam body. It is known that this region has environmental characteristics such as extreme low temperature, large diurnal temperature difference, and frequent freeze-thaw cycles. Moreover, the dam body is affected by the coupling effect of multiple fields such as temperature field, seepage field, and stress field. Therefore, the waterstop must meet the triple basic requirements of seepage prevention, freeze resistance, and earthquake resistance. In conventional construction, the waterstop is fixed by anchoring devices, and the joint gap is filled with sealant or foam board to meet the basic water-stopping requirements under normal low temperature environment.

[0003] When the dam body experiences joint displacement due to low-temperature shrinkage, the existing waterstop is prone to tensile cracking or separation from the concrete interface, forming a seepage channel. Furthermore, due to the freezing and thawing cycle, the water that seeps into the joint freezes and expands, which will generate periodic compressive stress on the waterstop, leading to local damage to the waterstop. At the same time, it will accelerate the aging and debonding of the waterstop and the concrete contact surface, further weakening the seepage prevention capability. Utility Model Content

[0004] The purpose of this utility model is to provide a low-temperature adaptable reinforcement structure for the joint waterstop of panel dams in arid and cold regions, in order to solve the problems mentioned in the background art, such as the waterstop being prone to tensile cracking or peeling from the concrete interface when the dam body is displaced due to low temperature shrinkage, forming a leakage channel, and the periodic compressive stress on the waterstop caused by the freezing and thawing cycle of water seeping into the joint, leading to local damage to the waterstop.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-temperature adaptable reinforcement structure for the joint waterstop of a panel dam in arid and cold regions, comprising a concrete panel, which is the main body of the panel dam and the basic load-bearing component of the waterstop structure. An anti-seepage base is fixedly installed at the joint between the concrete panels, and the surface of the anti-seepage base has a bottom arc-shaped waterstop section. The anti-seepage base and the bottom arc-shaped waterstop section constitute the waterstop body of the foundation. The bottom arc-shaped waterstop section has an arc-shaped protrusion facing the outside of the joint, and both ends of the bottom arc-shaped waterstop section abut against the inner sidewalls of the two concrete panels respectively. The arc-shaped protrusion surface of the bottom arc-shaped waterstop section is covered with a waterstop base plate, and the edge of the waterstop base plate is fixedly connected to the inner sidewall of the concrete panel. The top of the waterstop base plate is covered with a composite main waterstop, which extends along the length of the joint. Connecting grooves are opened on both sides of the composite main waterstop, and waterstop connecting pressure plates are inserted into the connecting grooves. Circular grooves are equidistantly arranged on the outer wall of the composite main waterstop, and disc springs are installed in the circular grooves. An anchor bolts penetrate the central hole of the disc springs, and the anchor bolts pass through the composite main waterstop and the waterstop base plate equidistantly along the joint direction and are threadedly connected to the concrete panel.

[0006] Using the above technical solution, the seepage-proof base and the bottom arc-shaped water-stop section constitute the main body of the basic water-stop, and the arc-shaped protrusion facing inward can initially block water seepage.

[0007] Preferably, the seepage-proof base and the bottom arc-shaped water-stop section form a strip structure with a fan-shaped cross-section, and the seepage-proof base is fixed to the edge of the water-stop bottom plate by pouring concrete.

[0008] Using the above technical solution, the fan-shaped strip structure of the seepage-proof base and the bottom arc-shaped water-stop section can disperse low-temperature shrinkage stress and enhance the water flow blocking effect.

[0009] Preferably, the contact surface between the water-stop base plate and the bottom arc-shaped water-stop section is coated with a waterproof adhesive, and the edge of the water-stop base plate is set in a wavy shape.

[0010] By adopting the above technical solution, the wavy edge design increases the contact area with the concrete panel, improves the connection stability, and further enhances the water-stopping sealing and deformation resistance of the foundation.

[0011] Preferably, the composite main waterstop includes an outer fluorosilicone blended rubber layer, a middle metal reinforcing skeleton, and an inner nail surface, and the metal nails of the inner nail surface of the composite main waterstop are embedded and fixed in the waterstop base plate.

[0012] Using the above technical solution, the fluorosilicone blended rubber layer of the composite main waterstop is protected against low-temperature embrittlement, the metal reinforced skeleton is tear-resistant, and the inner metal nails are embedded in the waterstop base plate to prevent peeling.

[0013] Preferably, the joint coverage width of the composite main waterstop is longer than the joint coverage width of the waterstop base plate.

[0014] Using the above technical solution, the composite main waterstop has a coverage width longer than the waterstop base plate, which can completely cover the joint between the base plate and the concrete panel, forming a secondary seepage prevention coverage and blocking water seepage along the edge of the base plate.

[0015] Preferably, sealing strips are embedded in the surfaces of both sides of the water-stop connecting pressure plate, and the sealing strips are in contact with the surface of the composite main water-stop strip.

[0016] By adopting the above technical solution, the sealing strips on both sides of the water-stop connecting pressure plate are in close contact with the surface of the composite main water-stop, directly sealing the assembly gap between the pressure plate and the water-stop, and preventing water seepage from breaking through the gap.

[0017] Preferably, the inner diameter of the disc spring is the same as the diameter of the anchor bolt, and the threaded connection between the anchor bolt and the concrete panel is coated with a low-temperature resistant and corrosion-resistant coating.

[0018] By adopting the above technical solution, the low-temperature resistant anti-corrosion coating on the bolt thread section prevents bolt corrosion and breakage caused by freeze-thaw cycles.

[0019] Compared with the prior art, the beneficial effects of this utility model are: the low-temperature adaptability reinforcement structure for the joint waterstop of the panel dam in arid and cold regions. 1. The middle layer of the composite main waterstop's metal reinforcement skeleton can improve tear resistance and resist tensile forces caused by dam shrinkage or earthquakes. Its inner layer of metal nails is embedded in the waterstop base plate for fixation, preventing low-temperature deformation from causing the waterstop to peel off from the base plate. At the same time, the disc spring in the circular groove on the outer wall of the composite main waterstop can compensate for the lateral displacement caused by the low-temperature shrinkage of the concrete panel through elastic deformation. When the displacement is small, it maintains the sealing pressure, and when the displacement is large, it avoids excessive stretching of the waterstop by compression or elongation. 2. The cross-sectional fan-shaped structure formed by the seepage-proof base and the bottom arc-shaped waterstop section has an arc-shaped protrusion facing the outside of the joint. It can block the initial seepage through water flow diversion and compression sealing. Secondly, the contact surface between the waterstop base plate and the bottom arc-shaped waterstop section is coated with waterproof adhesive. Combined with the edge wave-shaped design and the pouring concrete for fixation, it can not only prevent water from seeping from the gap between the waterstop section and the panel, but also enhance the bearing capacity of the base waterstop layer and resist the impact of freeze-thaw deformation. The joint coverage width of the composite main waterstop is longer than that of the waterstop base plate, which can completely cover the connection joint between the base plate and the panel. In addition, there are sealing strips embedded on both sides of the waterstop connection pressure plate. 3. Furthermore, the threaded connection between the anchor bolts and the concrete panel is coated with a low-temperature resistant anti-corrosion coating, which can effectively isolate low-temperature water vapor and freeze-thaw media, preventing bolt corrosion and breakage. At the same time, the inner diameter of the disc spring is consistent with the diameter of the anchor bolt shank, ensuring that the bolt force is evenly transmitted to the spring, so that the spring always maintains a constant preload and avoids the loss of preload caused by the thermal expansion and contraction of the bolt at low temperatures. In addition, the edge of the waterstop base plate is fixed to the seepage-proof base by pouring concrete, further enhancing the connection stability between the anchoring system and the dam body. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of this utility model; Figure 2 This is a schematic diagram of the overall disassembled three-dimensional structure of this utility model; Figure 3This is a schematic diagram of the overall internal three-dimensional structure of this utility model; Figure 4 A three-dimensional structural diagram of the installation of the concrete panel and water-stop base plate of this utility model; Figure 5 This is a schematic diagram of the overall internal side section of the present invention. Figure 6 This is a three-dimensional structural diagram of the water-stop base plate and the composite main water-stop strip of this utility model.

[0021] In the diagram: 1. Concrete panel; 2. Impermeable base; 3. Bottom arc-shaped waterstop section; 4. Waterstop base plate; 5. Composite main waterstop strip; 6. Connecting groove; 7. Waterstop connecting pressure plate; 8. Sealing pressure strip; 9. Disc spring; 10. Anchor bolt. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-6 The present invention provides a technical solution: a low-temperature adaptable reinforcement structure for the joint waterstop of a panel dam in arid and cold regions, comprising a concrete panel 1, an anti-seepage base 2, a bottom arc-shaped waterstop section 3, a waterstop bottom plate 4, a composite main waterstop 5, a connecting groove 6, a waterstop connecting pressure plate 7, a sealing pressure strip 8, a disc spring 9, and an anchor bolt 10. Among them, the concrete panel 1 is the main body of the panel dam and the basic load-bearing component of the water-stopping structure. The seepage prevention base 2 is fixedly installed at the joint between the concrete panels 1, and the surface of the seepage prevention base 2 has a bottom arc-shaped water-stopping section 3. The seepage prevention base 2 and the bottom arc-shaped water-stopping section 3 constitute the water-stopping main body of the foundation. The seepage-proof base 2 and the bottom arc-shaped water-stop section 3 form a strip structure with a fan-shaped cross-section. The seepage-proof base 2 and the edge of the water-stop base plate 4 are fixed by pouring concrete. The contact surface between the water-stop base plate 4 and the bottom arc-shaped water-stop section 3 is coated with waterproof adhesive. The edge of the water-stop base plate 4 is set in a wavy shape. The arc-shaped protrusion of the bottom arc-shaped water-stop section 3 faces the outside of the joint. The two ends of the bottom arc-shaped water-stop section 3 abut against the inner sidewall of the concrete panel 1 on both sides. The arc-shaped protrusion surface of the bottom arc-shaped water-stop section 3 is covered with the water-stop base plate 4. The edge of the water-stop base plate 4 is fixedly connected to the inner sidewall of the concrete panel 1. Referring to the attached diagrams in the instruction manual Figures 1-6As shown, at the joint between the concrete panels 1, the waterproof base 2 is first fixedly installed, and then the bottom arc-shaped water-stop section 3 is attached to the surface of the waterproof base 2, as shown. Figures 2-4 As shown, the two ends of the bottom arc-shaped waterstop section 3 abut against the inner wall of the concrete panel 1 to form a fan-shaped basic waterstop body. The waterstop base plate 4 is covered on the arc-shaped protruding surface of the bottom arc-shaped waterstop section 3. Waterproof adhesive is applied to the contact surface between the waterstop base plate 4 and the bottom arc-shaped waterstop section 3. Then, the edge of the waterstop base plate 4 is fixed to the inner wall of the concrete panel 1, and concrete is poured in the gap between the seepage prevention base 2 and the edge of the waterstop base plate 4 to further enhance the connection stability. The composite main waterstop 5 is laid on the top of the waterstop base plate 4 along the joint length direction, so that the metal nails on the inner nail surface of the composite main waterstop 5 are embedded and fixed in the waterstop base plate 4. At the same time, it is ensured that the joint coverage width of the composite main waterstop 5 is longer than that of the waterstop base plate 4, completely covering the connection joint between the waterstop base plate 4 and the concrete panel 1. Waterstop connecting pressure plates 7 are inserted into the connecting grooves 6 on both sides of the composite main waterstop 5, and it is ensured that the sealing pressure strips 8 embedded in the surface of both sides of the composite main waterstop 5 are in close contact with the surface of the composite main waterstop 5, sealing the gap between the pressure plate and the waterstop. A disc spring 9 is installed in the circular groove on the outer wall of the composite main waterstop 5. Anchor bolts 10 are then passed through the middle hole of the disc spring 9, the composite main waterstop 5, and the waterstop base plate 4 in sequence, and finally threadedly connected to the concrete panel 1. The disc spring 9 is pre-compressed by pre-tightening the bolts to ensure that each waterstop layer is tightly bonded. A composite main waterstop 5 is laid on the top of the waterstop base plate 4, and the composite main waterstop 5 extends along the joint length direction. The composite main waterstop 5 includes an outer fluorosilicone blended rubber layer, a middle metal reinforcing skeleton, and an inner nail surface. The metal nails of the inner nail surface of the composite main waterstop 5 are embedded and fixed in the waterstop base plate 4. The joint coverage width of the composite main waterstop 5 is longer than the joint coverage width of the waterstop base plate 4. Connecting grooves 6 are opened on both sides of the composite main waterstop 5, and waterstop connecting pressure plates 7 are inserted and installed in the connecting grooves 6. The outer wall surface of the composite main waterstop 5 is equidistantly arranged with... There is a circular groove, and a disc spring 9 is installed in the circular groove. The middle hole of the disc spring 9 is penetrated by the anchor bolt 10. The anchor bolt 10 is equidistantly inserted into the composite main waterstop 5 and the waterstop base plate 4 along the joint direction and is threadedly connected to the concrete panel 1. Sealing strips 8 are embedded in the two sides of the waterstop connecting pressure plate 7 and are in contact with the surface of the composite main waterstop 5. The inner diameter of the disc spring 9 is the same as the diameter of the rod of the anchor bolt 10. The threaded connection section between the anchor bolt 10 and the concrete panel 1 is coated with a low-temperature resistant anti-corrosion coating. Referring to the attached diagrams in the instruction manual Figures 1-6As shown, during daily use in a low-temperature static environment, the outer fluorosilicone blended rubber layer of the composite main waterstop 5 remains elastic, and the disc spring 9 maintains a pre-compressed state. The pre-tightening force of the anchor bolts 10 ensures that the composite main waterstop 5 is tightly attached to the waterstop base plate 4, and the bottom arc-shaped waterstop section 3 is tightly attached to the seepage-proof base 2. The layers work together to block conventional seepage and prevent sealing failure caused by low temperature. Even if water seeps into the dam body and penetrates along the joints, the fan-shaped structure of the anti-seepage base 2 and the bottom arc-shaped water-stop section 3 first blocks the seepage by adjusting the direction of water flow and squeezing and sealing. Even if a small amount of seepage breaks through the foundation defense line, it will be blocked by the ultra-wide coverage of the composite main water-stop 5 and the sealing strip 8. When the concrete panel 1 undergoes lateral displacement due to freeze-thaw shrinkage, the disc spring 9 compensates for the displacement difference through elastic deformation, avoiding excessive stretching or squeezing damage to the composite main water-stop 5. The composite main water-stop 5 is made by laying a fluorosilicone blended rubber layer on the outer wall of the completed stainless steel reinforced skeleton to form the outer layer, and welding metal nails with downward-pointing tips to form the inner layer on the inner wall of the stainless steel reinforced skeleton. The stainless steel reinforcing skeleton in the middle layer of the composite main waterstop 5 resists the tearing force generated by the earthquake. The wavy structure at the edge of the waterstop base plate 4 and the cast-in-place fixing structure disperse the impact stress. The low-temperature resistant and corrosion-resistant coating of the anchor bolts 10 prevents rust failure. The constant preload of the disc springs 9 ensures that the composite main waterstop 5 does not peel off from the waterstop base plate 4, realizing the coordinated work of foundation seepage prevention and anchoring compensation, and ensuring the reliability of waterstop.

[0024] Working principle: When using the low-temperature adaptable reinforcement structure of the joint waterstop of the panel dam in arid and cold regions, the concrete panel 1 provides the foundation bearing, the outer fluorosilicone rubber layer of the composite main waterstop 5 maintains elasticity, and its inner metal nail is embedded in the waterstop base plate 4 for fixation. The disc spring 9 is installed in the circular groove of the composite main waterstop 5, and the anchor bolt 10 passes through the spring, waterstop and waterstop base plate 4 and is threaded to the concrete panel 1. The pre-tightening force makes each waterstop layer fit together and blocks conventional seepage. As water seeps along the joints, the fan-shaped structure formed by the anti-seepage base 2 and the bottom arc-shaped water-stop section 3 redirects the water flow through the arc-shaped protrusion. Combined with the compression seal, it forms the first line of defense. The water-stop base plate 4 enhances the seal with waterproof adhesive and is fixed by edge pouring to resist deformation. Even if there is a small amount of seepage, it will be sealed a second time by the sealing strip 8 of the composite main water-stop 5 and the water-stop connecting pressure plate 7. The panel shrinkage displacement is compensated by the disc spring 9. When strong deformation occurs, the composite main waterstop 5 middle layer metal skeleton resists tearing, the waterstop base plate 4 wavy edge disperses stress, and the anchor bolt 10 anti-corrosion coating prevents failure. The multi-layer structure works together to ensure reliable waterstop and increase overall practicality.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Low-temperature adaptability reinforcement structure for joint waterstops in panel dams in arid and cold regions, including: The concrete panel (1) is the main body of the panel dam and the basic load-bearing component of the water-stopping structure. The joints between the concrete panels (1) are fixedly installed with anti-seepage bases (2), and the surface of the anti-seepage bases (2) has a bottom arc-shaped water-stopping section (3). The anti-seepage bases (2) and the bottom arc-shaped water-stopping section (3) constitute the water-stopping main body of the foundation. The features are as follows: the arc-shaped protrusion of the bottom arc-shaped water-stop section (3) faces the outside of the joint, and the two ends of the bottom arc-shaped water-stop section (3) respectively abut against the inner sidewall of the two concrete panels (1), the arc-shaped protrusion surface of the bottom arc-shaped water-stop section (3) is covered with a water-stop base plate (4), and the edge of the water-stop base plate (4) is fixedly connected to the inner sidewall of the concrete panel (1); The top of the water-stop base plate (4) is covered with a composite main water-stop strip (5), and the composite main water-stop strip (5) extends along the joint length direction. The composite main water-stop strip (5) is provided with connecting grooves (6) on both sides, and a water-stop connecting pressure plate (7) is inserted and installed in the connecting groove (6). The outer wall surface of the composite main water-stop strip (5) is provided with circular grooves at equal intervals, and a disc spring (9) is installed in the circular groove. The middle hole of the disc spring (9) is penetrated by an anchor bolt (10), and the anchor bolt (10) is inserted through the composite main water-stop strip (5) and the water-stop base plate (4) at equal intervals along the joint direction, and is threadedly connected to the concrete panel (1).

2. The low-temperature-resistant reinforcing structure for the joint waterstop belt of the dry and cold region face rockfill dam according to claim 1, characterized in that: The seepage-proof base (2) and the bottom arc-shaped water-stop section (3) form a strip structure with a fan-shaped cross-section, and the seepage-proof base (2) and the edge of the water-stop bottom plate (4) are fixed by pouring concrete.

3. The low-temperature-resistant reinforcing structure for the joint waterstop belt of the dry and cold region face rockfill dam according to claim 1, characterized in that: The contact surface between the water-stop base plate (4) and the bottom arc-shaped water-stop section (3) is coated with a waterproof adhesive, and the edge of the water-stop base plate (4) is set in a wavy shape.

4. The low-temperature adaptability reinforcement structure for the joint waterstop of arid and cold-region panel dams according to claim 1, characterized in that: The composite main waterstop (5) includes an outer fluorosilicone blended rubber layer, a middle metal reinforcing skeleton and an inner nail surface, and the metal nails of the inner nail surface of the composite main waterstop (5) are embedded and fixed in the waterstop base plate (4).

5. The low-temperature adaptability reinforcement structure for the joint waterstop of arid and cold-region panel dams according to claim 1, characterized in that: The joint coverage width of the composite main waterstop (5) is longer than the joint coverage width of the waterstop base plate (4).

6. The low-temperature adaptability reinforcement structure for the joint waterstop of arid and cold-region panel dams according to claim 1, characterized in that: The sealing strips (8) are embedded in the two sides of the water-stop connecting pressure plate (7), and the sealing strips (8) are in contact with the surface of the composite main water-stop strip (5).

7. The low-temperature adaptability reinforcement structure for the joint waterstop of arid and cold-region panel dams according to claim 1, characterized in that: The inner diameter of the disc spring (9) is the same as the diameter of the rod of the anchor bolt (10), and the threaded connection section between the anchor bolt (10) and the concrete panel (1) is coated with a low-temperature resistant anti-corrosion coating.

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