Deep foundation pit supporting dewatering anti-seepage structure

Abstract

The utility model provides a kind of deep foundation pit support precipitation anti-seepage structure, including support plate, slope, the top of support plate is provided with slope, detachable joint is connected at the four corners of support plate back to connect the support plate of side, the side of support plate is equipped with several cavities, the inboard of cavity is embedded with sealing strip, expansion strip, the sealing strip is in two sides while expansion strip is in middle, the bottom rim of support plate back is fixedly connected with bolt.The utility model has the advantages that: through slope, joint, cavity, sealing strip, expansion strip, flow guide groove, the joint between support plate is fully sealed, prevent the situation that the collapse caused by the precipitation in foundation pit seepage into foundation pit side wall appears, at the same time, support structure top is not prone to waterlogging, drainage efficiency is high, leakage point quantity is substantially reduced, waterproof performance is further improved.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical engineering technology, and in particular to a deep foundation pit support, dewatering and seepage prevention structure. Background Technology

[0002] Conventional foundation pit support structures typically employ support plates, usually combined with a bracing system to form a complete support system. The main body of the support plates is prefabricated in the factory and assembled on site. The embedment depth needs to be determined based on factors such as soil conditions, foundation pit depth, and groundwater level. Generally, the bottom of the support plate is required to be embedded into a stable soil layer to a certain depth. It is essential to ensure tight joints between the support plates to prevent leakage.

[0003] Traditional deep foundation pit support structures suffer from problems such as joint leakage and low drainage efficiency. Existing sealing structures are unable to accommodate the deformation gaps caused by the thermal expansion and contraction of the support plates, leading to seal failure and leakage. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to propose a deep foundation pit support, dewatering and seepage prevention structure to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0006] To achieve the above objectives, one embodiment of the present invention provides a deep foundation pit support, dewatering and seepage prevention structure, including a support plate and a slope. The top of the support plate is provided with a slope, and the four corners of the back of the support plate are detachably connected with joints to connect to the side support plates. The support plate has several cavities on both sides, and sealing strips and expansion strips are embedded in the inner side of the cavities. The sealing strips are on both sides and the expansion strips are in the middle. A bolt is fixedly connected to the bottom edge of the back of the support plate, and a connecting plate is fitted on the bolt; A fastener is threaded onto the bolt, and a support column is fixedly connected to one side of the connecting plate; The end of the support column is fixedly connected to a support plate, and an anchor rod is inserted into the support plate and driven into the bottom of the foundation pit. Support rods are fixedly connected to both ends of the front side of the support plate, and the support rods are installed behind the support plate by long rods; The back of the support plate is provided with a flow guide channel, which is tree-shaped. The top of the flow guide channel is connected to the slope. After flowing downwards, the flow guide channel becomes a channel and connects to the bottom of the support plate.

[0007] Preferably, the support plate is made of stainless steel, and the top of the slope is located on the front of the support plate.

[0008] The above technical solution is adopted: elastic adaptive sealing structure. Sealed cavities are installed at the joints of the support plates, using a composite structure of heterogeneous materials. Pre-embedded shape memory rubber strips (SMP) on both sides: These strips exhibit shape recovery characteristics within a temperature range of -20℃ to 60℃, and can compensate for joint displacement of 0.5-3mm. The central part is equipped with a super absorbent expansion bar: the expansion rate after water absorption is ≥400%, and the expansion pressure reaches 1.5MPa; Dynamic sealing mechanism: In a dry environment, the SMP strip achieves primary sealing through elastic preload. When water seeps in, the expansion strip expands within 20 seconds to form a secondary dynamic sealing interface.

[0009] Sealing performance: It can withstand 1.2MPa water pressure without leakage. The seal retention rate is high after 50 cycles of deformation.

[0010] Preferably, the sealing strip is made of rubber, and the sealing strip and expansion strip are bonded to or embedded in the inner side of the cavity.

[0011] The top of the support plate is designed with a slope to ensure top drainage and to direct water flow through the diversion channel. The diversion channel is designed in a tree shape, which greatly improves drainage efficiency compared to traditional structures.

[0012] Preferably, of any of the above solutions, the expansion strip is made of water-swellable rubber, the fastener is a nut, and the fastener is tightened onto the surface of the connecting plate.

[0013] The core structure of this device consists of: a ramp, joints, a cavity, sealing strips, expansion strips, and a guide channel. This support structure ensures that the joints between the support plates are fully sealed, preventing rainwater from seeping into the pit sidewalls and causing collapse. Simultaneously, the top of the support structure is less prone to water accumulation, resulting in high drainage efficiency, a significant reduction in the number of leakage points, and further improved waterproofing performance.

[0014] Preferably, in any of the above embodiments, the end of the long rod is threaded with a nut to secure the top of the support rod.

[0015] Preferably, the guide channel is tree-shaped, as described in any of the above schemes.

[0016] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: This deep foundation pit support dewatering and seepage prevention structure, through slopes, joints, cavities, sealing strips, expansion strips, and diversion channels, ensures that the joints between the support plates are fully sealed, preventing dewatering from seeping into the pit sidewalls and causing collapse. At the same time, the top of the support structure is not prone to water accumulation, resulting in high drainage efficiency, a significant reduction in the number of leakage points, and further improvement in waterproofing performance.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a first-view structural schematic diagram of the present invention; Figure 2 This is a structural schematic diagram of the present invention from a second perspective; Figure 3 This is a structural schematic diagram of the present invention from a third-view perspective; Figure 4 This utility model Figure 2 A magnified structural diagram of point A in the middle.

[0019] In the diagram: 1-support plate, 2-slope, 3-joint, 4-cavity, 5-sealing strip, 6-expansion strip, 7-bolt, 8-connecting plate, 9-fastener, 10-support column, 11-support plate, 12-anchor bolt, 13-support rod, 14-long rod, 15-guide channel. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] like Figure 1-4As shown, this deep foundation pit support, dewatering and seepage prevention structure includes a support plate 1 and a slope 2. The top of the support plate 1 is provided with a slope 2, and the four corners of the back of the support plate 1 are detachably connected with joints 3 to connect to the support plates 1 on the side. The support plate 1 has several cavities 4 on both sides. The cavity 4 is fitted with sealing strips 5 and expansion strips 6. The sealing strips 5 are on both sides and the expansion strips 6 are in the middle. A bolt 7 is fixedly connected to the bottom edge of the back of the support plate 1, and a connecting plate 8 is fitted on the bolt 7; A fastener 9 is threaded onto bolt 7, and a support column 10 is fixedly connected to one side of the connecting plate 8. The end of the support column 10 is fixedly connected to a support plate 11, and an anchor rod 12 is inserted into the support plate 11 and the anchor rod 12 is driven into the bottom of the foundation pit. Support rods 13 are fixedly connected to both ends of the front of the support plate 11, and the support rods 13 are installed behind the support plate 1 via long rods 14. A flow channel 15 is provided on the back of the support plate 1. The flow channel 15 is tree-shaped. The top of the flow channel 15 is connected to the slope 2. After the flow channel 15 flows down, it becomes a channel and connects to the bottom of the support plate 1.

[0023] Example 1: The support plate 1 is made of stainless steel, and the top of the ramp 2 is located on the front of the support plate 1. Elastic adaptive sealing structure. A sealing cavity 4 is provided at the joint of the support plate 1, which adopts a composite structure of heterogeneous materials: Pre-embedded shape memory rubber strips (SMP) on both sides: These strips exhibit shape recovery characteristics within a temperature range of -20℃ to 60℃, and can compensate for joint displacement of 0.5-3mm. The centrally located super-absorbent expansion bar 6 has an expansion rate of ≥400% after water absorption and an expansion pressure of up to 1.5MPa. Dynamic sealing mechanism: In a dry environment, the SMP strip achieves primary sealing through elastic preload. When water seeps in, the expansion strip expands within 20 seconds to form a secondary dynamic sealing interface.

[0024] Sealing performance: It can withstand 1.2MPa water pressure without leakage. The seal retention rate is high after 50 cycles of deformation. The sealing strip 5 is made of rubber, and the sealing strip 5 and expansion strip 6 are bonded to or embedded in the inner side of the cavity 4.

[0025] Example 2: The top of the support plate 1 is designed with a slope 2 to ensure top drainage and direct water flow along the guide channel 15. The guide channel 15 is designed in a tree shape, which greatly improves drainage efficiency compared to traditional structures. The expansion strip 6 is made of water-swellable rubber, and the fastener 9 is a nut, which is tightened onto the surface of the connecting plate 8. The end of the long rod 14 is threaded with a nut to fix the top of the support rod 13. The guide channel 15 is tree-shaped.

[0026] The working principle of this utility model is as follows: This system was applied in a 30m deep foundation pit project: The number of leak points has been reduced by 92%.

[0027] The precipitation cycle has shortened by 40%.

[0028] The deformation of the support structure should be controlled within 3mm.

[0029] The front of the support plate 1 faces the inner wall of the pit. The strut 13 is pushed into the predetermined position on the back of the support plate 1, and then the long rod 14 is tightened for fastening. The connecting plate 8 is simultaneously put on the bolt 7, and then fastened with the fastener 9. Anchor bolts 12 are inserted into the support plate 11, and the anchor bolts 12 are inserted into the bottom of the foundation pit; The support plates 1 are connected by joints 3.

[0030] Compared with the prior art, the present invention has the following advantages: This deep foundation pit support dewatering and seepage prevention structure, through the slope 2, joint 3, cavity 4, sealing strip 5, expansion strip 6, and diversion channel 15, ensures that the joints between the support plates 1 are fully sealed, preventing the dewatering in the foundation pit from seeping into the side wall of the foundation pit and causing collapse. At the same time, the top of the support structure is not prone to water accumulation, the drainage efficiency is high, the number of leakage points is greatly reduced, and the waterproof performance is further improved.

Claims

1. A deep foundation pit support, dewatering, and seepage prevention structure, characterized in that, Includes a support plate (1) and a ramp (2). The top of the support plate (1) is provided with a ramp (2). The four corners of the back of the support plate (1) are detachably connected with joints (3) to connect to the side support plates (1). The support plate (1) has several cavities (4) on both sides. The cavity (4) is inlaid with sealing strips (5) and expansion strips (6). The sealing strips (5) are on both sides and the expansion strips (6) are in the middle. A bolt (7) is fixedly connected to the bottom edge of the back of the support plate (1), and a connecting plate (8) is fitted on the bolt (7). A fastener (9) is threaded onto the bolt (7), and a support column (10) is fixedly connected to one side of the connecting plate (8). The end of the support column (10) is fixedly connected to a support plate (11), and an anchor rod (12) is inserted into the support plate (11) and the anchor rod (12) is driven into the bottom of the pit. The support plate (11) is fixedly connected to both ends of the front side with support rods (13), and the support rods (13) are installed behind the support plate (1) by long rods (14); The back of the support plate (1) is provided with a guide groove (15). The guide groove (15) is tree-shaped. The top of the guide groove (15) is connected to the slope (2). After the guide groove (15) flows down, it becomes a channel and connects to the bottom of the support plate (1).

2. The deep foundation pit support, dewatering, and seepage prevention structure as described in claim 1, characterized in that: The support plate (1) is made of stainless steel, and the top of the ramp (2) is located on the front of the support plate (1).

3. The deep foundation pit support, dewatering, and seepage prevention structure as described in claim 2, characterized in that: The sealing strip (5) is made of rubber, and the sealing strip (5) and the expansion strip (6) are bonded to or embedded in the inner side of the cavity (4).

4. The deep foundation pit support, dewatering, and seepage prevention structure as described in claim 3, characterized in that: The expansion strip (6) is made of water-swellable rubber, and the fastener (9) is a nut, which is fastened to the surface of the connecting plate (8).

5. The deep foundation pit support, dewatering, and seepage prevention structure as described in claim 4, characterized in that: The end of the long rod (14) is threaded with a nut to secure the top of the support rod (13).

6. The deep foundation pit support, dewatering, and seepage prevention structure as described in claim 5, characterized in that: The guide channel (15) is tree-shaped.

Images