Prefabricated assembly structure joint waterproof sealing performance detection component and detection method thereof

Abstract

The invention relates to the field of municipal engineering prefabricated assembly structures, in particular to a prefabricated assembly structure joint waterproof sealing performance detection component and a detection method. The component comprises a sealing belt and a bolt, wherein the sealing belt consists of a rubber belt, a steel wire and two rows of steel sheets; two sides of the rubber belt are provided with sawteeth, and two ends of the rubber belt are provided with joints with connecting holes. The steel wires are used for adjusting postures, and the steel sheets provide support and conduct pressure. During detection, the sealing tape is wound into a V-shaped embedded joint, and the joint is fastened by a bolt to form a closed ring; sealing after water injection and air exhaust through the inlet and outlet to maintain water pressure; water pressure is conducted through the steel sheet to expand the sealing tape, so that the sawteeth are tightly attached to the seam wall, and the external water pressure working condition is simulated. And the leakage condition is observed in the structure to evaluate the sealing performance. The member provided by the invention can be repeatedly used, is convenient to install, does not damage the joint, can truly reflect the sealing performance of the joint under external pressure, and is low in cost and suitable for field detection.

Description

Technical Field

[0001] This invention relates to the technical field of prefabricated assembly structures in municipal engineering, and in particular to a component and method for testing the waterproof sealing performance of joints in prefabricated assembly structures. Background Technology

[0002] Precast assembly structures have obvious advantages such as being green and low-carbon, convenient to construct, and controllable in quality. However, precast assembly structures are small in size and have many joints. The waterproof sealing of these joints is the key to the quality of the project. In order to eliminate potential problems and ensure construction quality, the testing of the waterproof sealing of the joints has become of paramount importance.

[0003] The waterproof sealing performance testing of precast assembled structure joints currently relies on several methods. One common practice is to simulate the assembly of precast components on a dedicated test bench in the factory or testing site, and then conduct pressurized water injection or spray tests at the joints to observe for leakage. This method relies on fixed testing equipment, and while it can control some variables, it cannot replicate actual construction conditions such as on-site hoisting, positioning, and environmental temperature differences. Another approach is to install a temporary sealing cover or pressurization device at the joint location on-site after component assembly, provided there is sufficient operating space inside the structure. Water or air is then injected into the cover to test the sealing performance. While this method can be performed on-site, it is often limited by confined spaces, cumbersome to install, and frequently requires temporary drilling, pasting, or setting up supporting components at the joint, which can easily interfere with or damage the existing waterproof joint structure. Furthermore, injecting water inside the precast assembled structure or between two rubber sealing rings cannot reflect the waterproof sealing performance of the joint when water pressure seeps from the outside to the inside under actual working conditions.

[0004] The existing testing methods mentioned above have drawbacks in practical applications, including high cost, difficulty in controlling testing quality, impact on joint structure, and inability to reflect the waterproof sealing performance of joints under actual working conditions when water pressure seeps from the outside to the inside. Therefore, there is an urgent need for a new testing tool to overcome these shortcomings. Summary of the Invention

[0005] To overcome the above problems, this invention proposes a component for testing the waterproof sealing performance of prefabricated assembled structure joints. The component includes a rubber sealing strip with built-in steel wire and two rows of steel plates, featuring sealing serrations on the sides and multiple inlets / outlets on the strip body. In use, the sealing strip is formed into a V-shape and embedded into the joint. After tightening the bolts at both ends, water is injected and pressurized. The steel plates convert the water pressure into an expansion force, causing the serrations to fit tightly against the joint wall, thus simulating external water pressure conditions and testing the joint's sealing performance. This component is reusable, easy to install, and allows for non-destructive testing.

[0006] To achieve the above objectives, the present invention specifically adopts the following solution: A component for testing the waterproof sealing performance of prefabricated assembled structure joints, comprising: The sealing strip comprises a rubber strip, steel wire, and two rows of steel sheets. The steel wire is embedded in the middle of the rubber strip along the length of the sealing strip to adjust and maintain the overall posture of the sealing strip during installation. The two rows of steel sheets are spaced apart and symmetrically embedded inside the rubber strip along the length of the sealing strip to provide rigidity support for the sealing strip and to generate an outward mechanical tendency when subjected to water pressure. The rubber strip has continuous serrations on both sides of its edges to ensure a tight fit with the joint sidewalls under pressure, thereby improving sealing. The rubber strip has connectors at both ends with connection holes. The rubber strip has multiple inlets and outlets for water injection, air venting, or sealing during testing. Bolts are used to pass through the connecting holes at both ends of the joint and tighten them, so that the sealing strip forms a closed ring structure.

[0007] Furthermore, the steel wire and two rows of steel sheets are wrapped inside the rubber belt, forming a composite structure with the rubber belt.

[0008] Furthermore, the rubber belt is made of rubber material with elasticity and tensile strength.

[0009] Furthermore, the steel wire, steel sheet, and bolts are all made of stainless steel.

[0010] Furthermore, the serrations are symmetrically distributed along both sides of the rubber belt, and their tooth shape is adapted to engage the joint sidewall surface when subjected to radial pressure.

[0011] Furthermore, the shape of the joint is adapted to the end contour of the rubber belt, enabling a sealed connection between the two end faces after tightening.

[0012] Furthermore, the inlets and outlets are distributed circumferentially along the sealing strip, and their number and position can be configured according to the joint size and inspection requirements, and can be connected or closed by external pipe fittings or sealing devices.

[0013] Furthermore, the two rows of steel sheets are symmetrically arranged on both sides of the steel wire. When water is injected and pressurized, the water pressure can be converted into a tendency for the sealing strip to expand from a V-shape to a flat shape, thereby enhancing the sealing effect of the saw teeth and the joint sidewall.

[0014] Correspondingly, the present invention provides a method for testing the waterproof sealing performance of joints in prefabricated assembled structures, using the aforementioned waterproof sealing testing component, comprising the following steps: Wrap the sealing tape around the outside of the joint, adjust it into a V-shape, and then insert it into the joint groove. Align the joints at both ends and tighten them with bolts to form a closed loop of sealing tape; Water is injected through at least one inlet / outlet located on the side of the joint, while air is expelled through at least one inlet / outlet located at the top of the joint. After the air is expelled, seal the top inlet and outlet, continue to inject water and maintain the set pressure inside the joint for the preset time; Observe the joints inside the prefabricated assembly structure to see if there is any water seepage or leakage, and evaluate the waterproof sealing performance of the joints accordingly. After the inspection is completed, loosen the bolts, remove the sealing tape from the joint, clean it, and reuse it for the inspection of the next joint.

[0015] Furthermore, during the water pressure maintenance process, the water pressure is transmitted to the rubber belt through two rows of steel plates, causing it to generate an outward expansion force, thereby enhancing the tight contact between the saw teeth and the joint sidewall, simulating the real working condition of external water pressure acting on the joint sealing ring.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The testing component uses a sealing strip structure composed of rubber strip, steel wire and steel sheet. The steel wire is embedded in the middle of the strip, giving the sealing strip overall flexibility, which is convenient for bending, insertion and posture adjustment in the confined space of construction. At the same time, two rows of symmetrically distributed steel sheets provide the necessary longitudinal stiffness for the sealing strip, which can stably maintain the preset V-shape and achieve quick and accurate installation without relying on complex external supports.

[0017] The continuous serrated structure on both sides of the sealing strip allows for initial contact with the joint sidewall in its natural state. During subsequent water injection and pressurization, the water pressure is effectively converted into a radial force that expands the V-shaped sealing strip outward through two rows of steel plates. This force directly acts on and strengthens the compression sealing effect between the serrations and the joint sidewall. This water pressure adaptive sealing mechanism improves the sealing reliability of the testing chamber and ensures stable maintenance of the test pressure. Multiple inlets and outlets circumferentially arranged on the sealing strip offer flexible functionality and can be defined as water injection ports, venting ports, or pressure monitoring ports, depending on the joint location and testing requirements. The top inlet and outlet are specifically for venting air, ensuring the testing chamber is filled with water, avoiding pressure instability caused by the air cushion effect, and ensuring that the applied water pressure acts truly and completely on the sealing area of ​​the joint.

[0018] The design of the connector and bolts enables rapid closure and disassembly of the sealing strip. After the two ends of the sealing strip are tightened with bolts, a continuous, closed annular testing cavity is formed. This connection method is robust and provides excellent sealing. After testing, the sealing strip can be easily removed by loosening the bolts, allowing it to be completely removed from the joint without damaging its original structure, thus achieving non-destructive use and recycling of the testing components. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the sealing strip installation position according to a preferred embodiment of the present invention; Figure 2This is a schematic cross-sectional view of the sealing strip inlet and outlet structure of a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the sealing strip testing test elevation of a preferred embodiment of the present invention; Figure 4 This is a cross-sectional schematic diagram of the sealing strip component in its unfolded and used states according to a preferred embodiment of the present invention; Figure 5 This is a cross-sectional schematic diagram of the joint of the sealing strip component in the unfolded state and the usage state according to a preferred embodiment of the present invention; Figure 6 This is a schematic diagram of the bolt connection and fastening plane of the sealing strip component according to a preferred embodiment of the present invention.

[0020] The numbers in the diagram are as follows: 1. Sealing tape; 2. Rubber tape; 3. Steel wire; 4. Steel sheet; 5. Sawtooth; 6. Joint; 7. Bolt; 8. Inlet / outlet. Detailed Implementation

[0021] The present invention will be described more clearly and completely below by way of embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments described herein.

[0022] Please see Figure 1 The prefabricated assembly structure joint waterproof sealing test component provided in this embodiment mainly consists of a sealing strip 1 and bolts 7. The main body of the sealing strip 1 is a rubber strip 2, with a steel wire 3 embedded in the middle along its length, and two rows of spaced steel sheets 4 symmetrically embedded on both sides. The steel wire 3 provides the sealing strip 1 with longitudinal toughness and bendability, while the two rows of steel sheets 4 provide it with the necessary lateral stiffness, allowing it to flexibly adapt to the installation posture while maintaining a stable V-shaped structure.

[0023] Please see Figure 2 and Figure 4 The rubber strip 2 has continuous serrations 5 along both sides of its edges. When the sealing strip 1 is inserted into the joint and subjected to radial pressure, these serrations 5 effectively engage with the concrete sidewalls of the joint, forming a preliminary sealing barrier. Multiple inlets and outlets 8 are provided on the rubber strip 2. These openings can be connected to external pipelines for water injection, air venting, or sealing using specialized clamps, depending on testing requirements.

[0024] Please see Figure 5 and Figure 6 The rubber band 2 has connectors 6 at both ends. The shape of the connectors 6 is specially designed to smoothly transition with the ends of the rubber band 2. Each connector 6 has a pre-drilled hole. During installation, after wrapping the sealing band 1 around the seam, align the connectors 6 at both ends, and use at least two bolts 7 to pass through the corresponding holes and tighten them to form a closed, sealed annular detection cavity.

[0025] Please see Figure 1 and Figure 3 During testing, firstly, select or cut a sealing strip 1 of appropriate length according to the perimeter of the joint to be tested. After the prefabricated components are assembled on site, wrap the sealing strip 1 around the joint and manually adjust its posture so that its cross-section is V-shaped. Then, insert this V-shaped sealing strip 1 into the reserved groove on the outside of the joint or the gap between two sealing waterstops. During this process, use the embedded steel wire 3 to adjust the longitudinal curvature of the sealing strip 1 to conform to the direction of the joint and ensure that at least one inlet / outlet 8 is located at the highest point of the joint.

[0026] After the sealing strip 1 is installed and tightened, connect the water supply pipe through one of the inlet / outlet 8 located at a lower position on the side of the joint, and begin injecting water into the cavity between the sealing strip 1 and the joint sealing ring. Simultaneously, the inlet / outlet 8 at the top of the joint remains open as an air vent, allowing water to smoothly expel air from the cavity. When a steady flow of water is observed from the top inlet / outlet 8, it indicates that the air in the cavity has been largely expelled. At this point, use a clamp or plug to seal the top inlet / outlet 8. Continue injecting water, using a pressure pump to increase the water pressure in the cavity and stabilize it at the preset test pressure value, maintaining this pressure for a specified period of 30 minutes.

[0027] Please see Figure 1 and Figure 4 During the pressure holding process, water pressure is applied evenly to the inner side of the V-shaped sealing strip 1. This pressure is effectively transmitted and distributed through the two embedded rows of steel plates 4, generating a mechanical tendency for the V-shaped opening to expand outward, tending to unfold into a straight line. This expansion tendency is converted into radial pressure, which acts continuously and evenly on the serrations 5 on both sides, making them press more tightly against the concrete surface of the joint sidewall, thereby achieving pressure-adaptive sealing, effectively preventing pressurized water from leaking from the edge of the sealing strip 1, ensuring stable test pressure, and ensuring that all pressure is truly applied to the waterproof sealing system of the joint.

[0028] Throughout the process of maintaining water pressure, inspectors are positioned inside the prefabricated assembly structure to closely observe whether there is water leakage, dampness, or water droplets at the joints. By recording the specific location and severity of the leakage, the waterproof sealing performance of the joint can be visually assessed, and potential defects can be located.

[0029] Please see Figure 5 and Figure 6 After the inspection is completed, first stop pressurizing and open the drain valve to release the pressure. Then loosen and remove the bolts 7 of the connecting joint 6 to release the closed state of the sealing strip 1. Due to the presence of the steel wire 3, the shape of the sealing strip 1 can be easily adjusted and gently pulled out of the joint. After a simple cleaning and inspection of the sealing strip 1, the component can be reused for the inspection of the next joint in the same project or other projects, reducing the cost of a single inspection.

[0030] The prefabricated assembly joint waterproof sealing performance testing component and its testing method of the present invention are simple in construction, safe and reliable, and economical. On the one hand, the waterproof sealing performance testing component has a low cost and can be reused, further reducing the cost of waterproof sealing performance testing. On the other hand, the waterproof sealing performance testing component is easy to install. It can be easily installed and tested under various construction conditions, including confined space operation conditions, simply by relying on its own flexible yet rigid characteristics, without affecting the joint. Finally, the waterproof sealing performance testing component is applicable to various prefabricated assembly joints and can better detect the sealing performance of the joint sealing ring under external water pressure.

[0031] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A component for testing the waterproof sealing performance of prefabricated assembled structure joints, characterized in that, include: The sealing strip (1) consists of a rubber strip (2), a steel wire (3), and two rows of steel sheets (4). The steel wire (3) is embedded in the middle of the rubber strip (2) along the length of the sealing strip (1) to adjust and maintain the overall posture of the sealing strip during installation. The two rows of steel sheets (4) are spaced apart and symmetrically embedded in the rubber strip (2) along the length of the sealing strip (1) to provide rigidity support for the sealing strip and generate an outward mechanical tendency when subjected to water pressure. The rubber strip (2) has continuous serrations (5) on both sides of its edges, which are used to fit tightly against the sidewall of the joint when under pressure to improve the sealing performance; the rubber strip (2) has a connector (6) at both ends, and the connector (6) has a connection hole; the rubber strip (2) has multiple inlets and outlets (8) for water injection, air venting or sealing during testing; Bolts (7) are used to pass through the connecting holes on the joints (6) at both ends and tighten them so that the sealing strip (1) forms a closed ring structure.

2. The prefabricated assembled structure joint waterproof sealing test component according to claim 1, characterized in that, The steel wire (3) and two rows of steel sheets (4) are wrapped inside the rubber belt (2) to form a composite structure with the rubber belt (2).

3. The prefabricated assembled structure joint waterproof sealing test component according to claim 1, characterized in that, The rubber strip (2) is made of rubber material with elasticity and tensile strength.

4. The prefabricated assembled structure joint waterproof sealing test component according to claim 1, characterized in that, The steel wire (3), steel sheet (4) and bolt (7) are all made of stainless steel.

5. The prefabricated assembled structure joint waterproof sealing test component according to claim 1, characterized in that, The serrations (5) are symmetrically distributed on both sides of the rubber strip (2), and their tooth structure is adapted to engage the sidewall surface of the joint when subjected to radial pressure.

6. The prefabricated assembled structure joint waterproof sealing test component according to claim 1, characterized in that, The shape of the connector (6) is adapted to the end profile of the rubber strip (2), enabling a sealed connection between the two end faces after tightening.

7. The prefabricated assembled structure joint waterproof sealing test component according to claim 1, characterized in that, The inlet and outlet (8) are distributed circumferentially along the sealing strip (1). Their quantity and position can be configured according to the joint size and inspection requirements, and can be connected or closed by external pipe fittings or sealing devices.

8. The prefabricated assembled structure joint waterproof sealing test component according to claim 1, characterized in that, The two rows of steel sheets (4) are symmetrically arranged on both sides of the steel wire (3). When water is injected and pressurized, the water pressure can be converted into a tendency for the sealing strip (1) to expand from a V-shape to a flat shape, thereby enhancing the sealing effect of the saw teeth (5) and the joint sidewall.

9. A method for testing the waterproof sealing performance of joints in prefabricated assembled structures, characterized in that, Using as claimed in claim 1 The waterproof sealing test component as described in any one of the 8 includes the following steps: Wrap the sealing tape (1) around the outside of the joint, adjust it into a V-shape, and then place it into the joint groove; Align the joints (6) at both ends and tighten them with bolts (7) to form a closed loop with the sealing strip (1); Water is injected through at least one inlet / outlet (8) located on the side of the joint, while air is expelled through at least one inlet / outlet (8) located at the top of the joint; After the air is exhausted, seal the top inlet and outlet (8), continue to inject water and maintain the water pressure inside the joint at the set pressure for a preset time; Observe the joints inside the prefabricated assembly structure to see if there is any water seepage or leakage, and evaluate the waterproof sealing performance of the joints accordingly. After the inspection is completed, loosen the bolt (7), remove the sealing strip (1) from the joint, clean it, and reuse it for the inspection of the next joint.

10. The detection method according to claim 9, characterized in that, During the water pressure maintenance process, the water pressure is transmitted to the rubber belt (2) through two rows of steel plates (4), which causes it to generate an outward expansion force, thereby enhancing the tight contact between the saw teeth (5) and the joint sidewall, simulating the real working condition of external water pressure acting on the joint sealing ring.

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