HDPE (high-density polyethylene) impermeable membrane welding structure applied to corner position of slope of foundation pit
By adopting an HDPE anti-seepage film welding structure including transition diaphragm at the corner position of the foundation pit slope, the problem of the anti-seepage film arching or pulling in the corner area caused by the degradation of construction quality, achieving high-quality anti-seepage film construction and strengthening the connection strength.
Patent Information
- Application Number
- CN202420597638.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-03-26
AI Technical Summary
At the corner of the foundation pit slope, it is difficult to achieve high-quality laying in the existing HDPE anti-seepage film construction, resulting in the anti-seepage film not fitting with the substrate and the construction quality is difficult to meet the requirements.
An HDPE anti-seepage welding structure including a transition diaphragm is adopted. The transition diaphragm is laid along the corner position of the slope, and the transition diaphragm on both sides is connected by lapping welding. The bottom and the anti-seepage film at the bottom are welded to form a reinforcement area.
It is realized that different anti-seepage film laying methods are adopted according to the amplitude of different slope angles to ensure construction quality, and the connection strength of the anti-seepage film and the ability to deal with thermal expansion and contraction are strengthened through the reinforcement area and the deformation reserved area.
Smart Images
Figure CN222614310U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of anti-seepage membrane construction, in particular to a HDPE anti-seepage membrane welding structure applied to the corner position of a foundation pit slope. Background Art
[0002] In the construction of HDPE anti-seepage membrane, in the construction of anti-seepage membrane at the corner of the variable pit, due to the different angles of the slope corner, the anti-seepage membrane laying method required is different. The current conventional method is to use the positive anti-seepage membrane to directly lay the slope corner area, resulting in the anti-seepage membrane and the substrate not fitting after construction, and the construction quality is difficult to meet the requirements. Summary of the invention
[0003] The technical problem to be solved by the utility model is to provide a HDPE anti-seepage membrane welding structure applied to the corner position of the foundation pit slope, which can achieve high-quality construction of the anti-seepage membrane in the corner area according to different slope angle amplitudes, and avoid the problem of arching or pulling of the anti-seepage membrane in the corner area causing a decrease in construction quality.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a HDPE anti-seepage membrane welding structure applied to the corner position of the foundation pit slope, including a transition membrane, the transition membrane is laid along the corner position of the slope, and the transition membranes laid between the slopes on both sides are connected by lap welding;
[0005] The bottom of the transition membrane is welded to the anti-seepage membrane arranged at the bottom of the reservoir by means of scar reinforcement to form a reinforcement zone.
[0006] In a preferred solution, the transition membranes on the slope on the same side are overlap-welded to form a weld;
[0007] The welds on the slopes on both sides are staggered along the slope direction, and the spacing between adjacent welds is controlled to be more than 50 cm.
[0008] In a preferred solution, a middle wide membrane arranged along the slope is provided at the center of the corner area of the slope, and both sides of the middle wide membrane are pressed onto one end of the transition membranes arranged on both sides of the slope.
[0009] In a preferred solution, an uneven deformation reserved area is formed between the transition membrane and the reservoir bottom anti-seepage membrane.
[0010] The utility model provides a HDPE anti-seepage membrane welding structure applied to the corner position of the foundation pit slope, which has the following beneficial effects by adopting the above structure:
[0011] (1) According to the different slope angles, different anti-seepage membrane laying methods are adopted to ensure the construction quality of the anti-seepage membrane under different construction conditions;
[0012] (2) The reinforcement zone between the transition membrane and the reservoir bottom anti-seepage membrane can effectively strengthen the connection strength between the anti-seepage membrane on the slope and the reservoir bottom anti-seepage membrane;
[0013] (3) The deformation reserve area set at the junction of the slope and the reservoir bottom can cope with the arching of the anti-seepage membrane caused by thermal expansion and contraction of the anti-seepage membrane due to climatic reasons, resulting in the compression and rupture of the anti-seepage membrane. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model when it is in a small-angle turning area.
[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model when it is in a large-angle turning area.
[0017] Figure 3 It is a structural schematic diagram of the connection position between the side slope and the reservoir bottom of the utility model.
[0018] In the figure: slope 1, reservoir bottom 2, transition membrane 3, weld 4, middle wide membrane 5, reinforcement area 6, deformation reserved area 7. DETAILED DESCRIPTION
[0019] Embodiment 1:
[0020] like Figure 1 In the present invention, a HDPE anti-seepage membrane welding structure applied to the corner position of the foundation pit slope comprises a transition membrane 3, wherein the transition membrane 3 is laid along the corner position of the slope 1, and the transition membrane 3 laid between the slopes 1 on both sides is connected by lap welding;
[0021] The bottom of the transition membrane 3 is welded to the anti-seepage membrane arranged on the reservoir bottom 2 by means of scar reinforcement, and a reinforcement area 6 is formed.
[0022] In a preferred solution, the transition membranes 3 on the same side of the slope 1 are overlap-welded to form a weld 4;
[0023] The welds 4 on the side slopes 1 at both sides are arranged alternately along the direction of the side slopes 1 , and the spacing between adjacent welds 4 is controlled to be more than 50 cm.
[0024] Embodiment 2:
[0025] like Figure 2 As shown, a middle wide membrane 5 arranged along the direction of the slope 1 is arranged at the center of the corner area of the slope 1 , and both sides of the middle wide membrane 5 are pressed onto one end of the transition membrane 3 arranged on both sides of the slope 1 .
[0026] Embodiment 3:
[0027] like Figure 3 As shown, the transition membrane 3 is a trapezoidal sheet structure and is evenly arranged along the corners of the slope 1.
[0028] Embodiment 4:
[0029] like Figure 3 As shown, on the basis of embodiments 1-3, an uneven deformation reserved area 7 is formed between the transition membrane 3 and the anti-seepage membrane of the reservoir bottom 2.
[0030] Based on the above embodiments:
[0031] For places where the corners are right angles or have a very small amplitude, it is recommended to adopt the paving method of Example 1, and the welding points of the slopes on both sides should be staggered by at least 50 cm to avoid stress concentration. At the intersection of the slope and the reservoir bottom, scar filling is used to strengthen and form a reinforcement area 6.
[0032] For places with small corners (narrow places should at least exceed the width of a film), it is recommended to adopt the laying method of Example 2, laying a medium-width film 5 in the middle, welding the membranes of the slopes 1 on both sides to the middle membrane, and using scar patching to strengthen the intersection of the slope and the reservoir bottom.
[0033] Considering that HDPE membrane has the characteristics of thermal expansion and contraction, the temperature is high during construction in the daytime, and the membrane is in an elongated and stretched state; when the temperature drops at night, the membrane shrinks, and the membrane that was originally attached to the base surface will be pulled due to shrinkage, and in serious cases, the membrane may be damaged. In order to avoid damage to the HDPE membrane, it is necessary to fully consider the impact of climate temperature on the thermal expansion and contraction of the membrane during laying, and make provisions. Therefore, if Figure 3 As shown, a deformation reserve area 7 is provided at the junction of the slope 1 and the reservoir bottom 2. Although the overall appearance lacks flatness, it can adapt to a certain proportion of shrinkage.
Claims
1. A HDPE anti-seepage membrane welding structure applied to the corner of a foundation pit slope, comprising a transition membrane (3), characterized in that: The transition membrane (3) is laid along the corner of the slope (1), and the transition membranes (3) laid between the slopes (1) on both sides are connected by lap welding; The bottom of the transition membrane (3) is welded to the anti-seepage membrane arranged on the reservoir bottom (2) by means of scar reinforcement, thereby forming a reinforcement area (6).
2. The HDPE anti-seepage membrane welding structure applied to the corner of the foundation pit slope according to claim 1, characterized in that: The transition membranes (3) on the same side of the slope (1) are overlap-welded to form a weld (4); The welds (4) on the side slopes (1) on both sides are arranged in a staggered manner along the direction of the side slopes (1), and the spacing between adjacent welds (4) is controlled to be more than 50 cm.
3. The HDPE anti-seepage membrane welding structure applied to the corner of the foundation pit slope according to claim 1, characterized in that: A middle wide membrane (5) arranged along the direction of the slope (1) is arranged at the center of the corner area of the slope (1), and both sides of the middle wide membrane (5) are pressed onto one end of the transition membrane (3) arranged on both sides of the slope (1).
4. The HDPE anti-seepage membrane welding structure applied to the corner of the foundation pit slope according to claim 1, characterized in that: An uneven deformation reserved area (7) is formed between the transition membrane (3) and the anti-seepage membrane of the reservoir bottom (2).