Underground diaphragm wall reserved with special cavity for detection and repair

Abstract

The utility model discloses an underground diaphragm wall reserved with a special cavity for detection and repair, which is provided with a reinforcement cage, the reinforcement cage is provided with a plurality of vertical ribs and horizontal ribs, and joints are arranged at two ends of the reinforcement cage in the horizontal direction; the reinforcement cage is provided with a plurality of embedded pipes, the embedded pipes are made of degradable materials, a plurality of U-shaped reserved special cavities are formed in the underground diaphragm wall after the embedded pipes are degraded, one end of each special cavity is connected with a plugging device, and an opening in the other end of each special cavity is connected with a detection device. According to the underground diaphragm wall with the reserved special cavity for detection and repair, the special cavity for detection and repair is reserved in the waterproof hidden danger position of the underground diaphragm wall, and whether the waterproof performance meets the design requirement or not is judged by detecting the air tightness of the special cavity; and by utilizing the reserved special cavity, a flexible sealing waterproof material can be injected into the defect part, so that nondestructive repair is realized.

Description

Technical Field

[0001] This utility model relates to a diaphragm wall with a reserved cavity for testing and repair. Background Technology

[0002] A diaphragm wall is a basic engineering project: a special trenching machine is used on the ground to excavate a narrow, deep trench along the perimeter of the deep excavation project under the condition of mud wall protection; after cleaning the trench, a steel cage is suspended in the trench, and then concrete is poured in using the tremie method to form a unit trench segment; this process is carried out segment by segment to build a continuous reinforced concrete wall underground, which serves the functions of water interception, seepage prevention, load bearing, and soil retention.

[0003] Due to the unavoidable overlapping joints and structural gaps within the concrete during diaphragm wall construction, these areas often become potential waterproofing hazards. Current technology cannot detect or repair these hazards non-destructively. If leakage occurs and is not detected and repaired promptly, it will inevitably weaken the diaphragm wall's water-blocking and soil-retaining functions, and may even further threaten the overall safety and stability of the project. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a diaphragm wall with a reserved cavity for testing and repair. A pre-embedded pipe is reserved at the waterproofing hazard points of the diaphragm wall. By testing the airtightness of the reserved cavity formed after the pre-embedded pipe degrades, the waterproofing performance of the diaphragm wall can be determined to meet design requirements. Furthermore, this reserved cavity allows for the injection of flexible sealing and waterproofing material into the defective areas, achieving non-destructive repair.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a diaphragm wall with a reserved cavity for detection and repair, equipped with a steel cage, wherein the steel cage is provided with a plurality of embedded pipes, and the embedded pipes are made of biodegradable materials.

[0006] Preferably, the reinforcing cage is provided with a number of vertical bars, and each of the pre-embedded pipes is tied to a pair of opposite vertical bars along the direction of the vertical bars, with both ends of the pipe being higher than the top surface of the reinforcing cage, and the middle section being U-shaped at the bottom of the reinforcing cage.

[0007] Preferably, the steel cage has joints at both ends in the horizontal direction, and the embedded pipe is fixed at the joint joint along the joint direction. The two ends of the embedded pipe are higher than the top surface of the joint, and the middle section is bent in a U-shape at the bottom of the joint.

[0008] Preferably, the diameter of the embedded pipe is determined according to the engineering design requirements.

[0009] Preferably, the number and location of the pre-embedded pipes are determined according to the engineering design requirements.

[0010] Preferably, after the pre-embedded pipe degrades, it forms several U-shaped reserved special cavities inside the diaphragm wall. One end of the special cavity is connected to a sealing device, and the opening at the other end is connected to a detection device.

[0011] Preferably, the detection device has a gas pressure sensor at one end facing the dedicated cavity and an external port at the other end.

[0012] Preferably, the gas pressure sensor signal is connected to an external data receiving and display device to display the gas pressure value of the dedicated cavity.

[0013] Preferably, the external port can be connected to a negative pressure device for applying negative pressure to the dedicated cavity.

[0014] Preferably, the external port can be connected to a grouting machine to inject flexible sealing and waterproofing material into the dedicated cavity for non-destructive repair.

[0015] This utility model provides a diaphragm wall with a reserved cavity for detection and repair. A pre-embedded pipe is reserved at the waterproofing potential area of ​​the diaphragm wall. By detecting the airtightness of the reserved cavity formed after the pre-embedded pipe degrades, it can be determined whether the waterproofing performance of the waterproofing potential area of ​​the diaphragm wall meets the design requirements. Furthermore, by using this reserved cavity, flexible sealing waterproofing material can be injected into the defective area to achieve non-destructive repair. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the accompanying drawings are only some embodiments of this utility model. For those skilled in the art, other embodiments and their accompanying drawings can be obtained from the embodiments shown in these drawings without creative effort.

[0017] Figure 1 This is a side view of the steel cage structure of this utility model.

[0018] Figure 2 This is a top view of the steel cage structure of this utility model.

[0019] Figure 3 This is a top view of the second steel cage structure of this utility model.

[0020] In the diagram: vertical rib 1, horizontal rib 2, support plate 3, grouting port 31, embedded pipe 4, joint 5, I-beam 51, sealing plate 52. Detailed Implementation

[0021] The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments described in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope protected by the present utility model.

[0022] As Figures 1 to 3 shown, this embodiment discloses a diaphragm wall reserved with a special cavity for detection and repair, provided with a steel reinforcement cage, the steel reinforcement cage is provided with several vertical bars 1 and horizontal bars 2, and joints 5 are provided at both ends of the steel reinforcement cage in the horizontal direction.

[0023] There are two types of diaphragm walls in this device. One type of joint 5 adopts the form of an I-beam, and the other is a sealing plate 52. The two types of diaphragm walls are arranged at intervals, and the sealing plate 5 is welded to the I-beam by welding to form the steel reinforcement frame of the integral diaphragm wall.

[0024] Two support plates 3 are provided on the steel reinforcement cage, and a pouring port 31 is provided in the middle of the support plate 3. Concrete is poured into the interior from the pouring port 31. The support plate 3 can be used to connect and fix the pouring pipeline.

[0025] A number of embedded pipes 4 made of degradable materials are provided in the steel reinforcement cage of this device. Each of the embedded pipes 4 is tied to a pair of opposite vertical bars 1 along the direction of the vertical bar 1. Both ends thereof are higher than the top surface of the steel reinforcement cage, and the middle section is bent in a U shape at the bottom of the steel reinforcement cage. The distance between the two ports of each embedded pipe 4 is less than the width of the steel reinforcement cage, so as to ensure that the embedded pipe 4 will not be exposed after pouring concrete.

[0026] With such a setting, after the concrete to be poured hardens, a U-shaped reserved special cavity is formed at the seam position of the diaphragm wall after the embedded pipe 4 degrades. One end of the special cavity formed after the degradation of the embedded pipe 4 is selected to block the opening, and the other end of the opening is connected to a detection device for sealing. One end of the detection device facing the special cavity is provided with a gas pressure sensor, and the other end is provided with an external connection port.

[0027] In the later stage, the reserved special cavity can be used to detect the airtightness to check whether the waterproof performance of the diaphragm wall meets the design requirements. The external connection port of the detection device is connected to a negative pressure device, and the special cavity is subjected to negative pressure vacuum treatment by this device. The signal of the gas pressure sensor is connected to an external data receiving and display device for displaying the gas pressure value of the special cavity. When the vacuum negative pressure value at the detection part ≤ -60 kPa and the pressure is maintained for 2 - 5 minutes or more, it can be determined as qualified. If the airtightness of the reserved special cavity meets the requirements, it can be determined that the waterproof performance of this position of the diaphragm wall meets the design requirements.

[0028] If the airtightness does not meet the requirements, it indicates a potential waterproofing hazard. A flexible sealing and waterproofing material can be injected into the dedicated cavity through an external grouting machine connected to the external port for non-destructive repair.

[0029] The quantity and location of the pre-embedded pipes 4 are determined according to the engineering design requirements, and can be set with reference to the following:

[0030] Due to the structural characteristics of diaphragm walls, the joints are more prone to waterproofing issues than the walls themselves. Therefore, the pre-embedded pipes 4 located at the joints should be prioritized, while the pre-embedded pipes at the wall locations can be arranged at intervals to address actual conditions.

[0031] Finally, the diameter of the embedded pipe 4 depends on the engineering design requirements. The factors to be considered are the estimated size of the defect and its impact on the concrete strength. Since the main purpose is to solve the sealing problem of tiny gaps, the diameter should not be too large. Under normal circumstances, a capillary tube can meet the requirements.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and not restrictive in all respects. The scope of this invention is defined by the appended claims, not by the foregoing description, and is therefore intended to encompass all variations falling within the meaning and scope of equivalents of the claims. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A diaphragm wall with a reserved cavity for testing and repair, and equipped with a steel reinforcement cage, characterized in that: The steel cage is provided with several embedded pipes (4), which are made of biodegradable materials. After degradation, the embedded pipes (4) form several U-shaped reserved special cavities inside the diaphragm wall. One end of the special cavity is connected to a sealing device, and the opening at the other end is connected to a detection device.

2. The diaphragm wall according to claim 1, characterized in that: The steel cage is provided with a number of vertical bars (1), and each of the pre-embedded pipes (4) is tied to a pair of opposite vertical bars (1) along the direction of the vertical bars (1). Its two ends are higher than the top surface of the steel cage, and its middle section is U-shaped at the bottom of the steel cage.

3. The diaphragm wall according to claim 1, characterized in that: The steel cage has joints (5) at both ends in the horizontal direction. The embedded pipe (4) is fixed at the joint position of the joint (5) along the joint direction. The two ends of the embedded pipe (4) are higher than the top surface of the joint (5), and the middle section is bent in a U-shape at the bottom of the joint (5).

4. The diaphragm wall according to any one of claims 1-3, characterized in that: The diameter of the pre-embedded pipe (4) is determined according to the engineering design requirements.

5. The diaphragm wall according to any one of claims 1-3, characterized in that: The number and location of the pre-embedded pipes (4) are determined according to the engineering design requirements.

6. The diaphragm wall according to claim 1, characterized in that: The detection device has a gas pressure sensor at one end facing the dedicated cavity and an external port at the other end.

7. The diaphragm wall according to claim 6, characterized in that: The gas pressure sensor signal is connected to an external data receiving and display device to display the gas pressure value of the dedicated cavity.

8. The diaphragm wall according to claim 6, characterized in that: The external port can be connected to a negative pressure device for applying negative pressure to the dedicated cavity.

9. The diaphragm wall according to claim 6, characterized in that: The external port can be connected to a grouting machine to inject flexible sealing and waterproof material into the dedicated cavity for non-destructive repair.

Images