Building deep foundation pit dewatering and supporting construction device

Abstract

The application is a kind of building deep foundation pit dewatering support construction device, which relates to the technical field of foundation pit support structure and comprises support plates and short vertical plates arranged at intervals, a connecting bottom plate fixed between the bottom of the support plates and the short vertical plates, a support pipe connected between the support plates and the short vertical plates, forming a triangular support structure, an inclined filter plate and a water filtering cavity arranged between the support plates and the short vertical plates, the support pipe being communicated with a water pump, and mud water being filtered by the inclined filter plate and then entering the water filtering cavity before being pumped out by the water pump, so that the device can perform dewatering operation while supporting, the support plates and the short vertical plates being connected by the support pipe to form a triangular support, the short nails of the lower fixing structure being inserted into the soil at the bottom of the foundation pit to achieve preliminary fixation, and the long nails of the upper ground nail assembly being fixed to the ground at the top of the foundation pit to form secondary fixation, so that the double fixation structure of one above the other greatly improves the overall overturning resistance and structural stability of the device.

Description

Technical Field

[0001] This invention specifically relates to a construction device for dewatering and supporting deep foundation pits, and pertains to the field of foundation pit support structure technology. Background Technology

[0002] Deep foundation pit excavation is a high-risk operation in modern construction, especially in water-rich geological conditions. Due to insufficient soil bearing capacity and high groundwater levels, without effective support and dewatering measures, it is highly susceptible to safety accidents such as collapse and water inrush. Existing foundation pit support devices have many technical defects in practical applications: First, multiple support plates cannot achieve effective airtight combination, and leakage is easy at the plate joints, resulting in poor waterproofing and water-stopping effects; second, the combination of support plates cannot well adapt to the curvature changes of the foundation pit inner wall, resulting in low fit with the sidewall, leading to stress concentration and poor overall support; third, existing support devices generally do not have dewatering functions, and cannot simultaneously lower the water level during support construction, requiring additional dewatering equipment, increasing construction procedures and costs; fourth, the overall stability of the support structure needs to be improved, and under the combined action of lateral earth pressure and water pressure, the support system is prone to deformation or even instability. In addition, during long-term pumping, traditional dewatering equipment is prone to clogging by construction waste, concrete fragments, plastic products and other debris, making subsequent cleaning and maintenance difficult and seriously affecting the overall service life of the equipment. Therefore, there is an urgent need to propose a construction device for dewatering support in deep foundation pits to improve the above problems. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a deep foundation pit dewatering support construction device that features good sealing performance of the support plate, adaptability to changes in the curvature of the foundation pit, dewatering and drainage functions, and high support stability. This device has significant practical value in ensuring construction safety and improving project efficiency, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a construction device for dewatering and supporting deep foundation pits, comprising support plates and short vertical plates arranged at intervals, a connecting base plate being fixed between the bottoms of the support plates and the short vertical plates to form a U-shaped frame structure, and a support pipe being connected between the support plates and the short vertical plates to form a triangular support structure; An inclined filter plate is fixedly mounted on the upper side of the connecting base plate, which is inclined towards the short vertical plate, and a water filtration chamber is formed on the lower side of the inclined filter plate. The bottom end of the support pipe is fixedly inserted through the inclined filter plate, and filter holes communicating with the water filtration chamber are opened on the inclined filter plate. A water pump is installed on the top of the support plate. The water pump's pumping end is connected to the upper end of the support pipe, and the lower end of the support pipe is connected to the filter chamber. Flexible connecting plates are locked to both sides of the support plate.

[0005] A further improved solution includes a lower fixing structure on the underside of the short upright plate. The lower fixing structure includes an embedded groove on the bottom surface of the short upright plate and multiple telescopic rods installed vertically inside the short upright plate. A horizontal plate is installed at the bottom telescopic end of the telescopic rod, and multiple short nails are fixed on the underside of the horizontal plate for driving into the soil at the bottom of the foundation pit.

[0006] A further improved solution is that an upper ground spike assembly is installed on the top of the support plate, and the upper ground spike assembly is used to fix it to the ground around the top of the pit. The upper ground spike assembly includes multiple rotating rods that are rotatably installed on both sides of the top of the support plate. Multiple long spikes are inserted through the rotating rods, and the long spikes are used to fix it to the ground around the top of the pit.

[0007] In a further improved design, side sealing plates are installed on the left and right sides of the short vertical plate, the inclined filter plate, and the connecting base plate. These side sealing plates are used to seal the sides of the water filtration chamber.

[0008] In a further improved design, dovetail grooves are vertically formed on the left and right sides of the support plate, and dovetail tenons are provided on the left and right sides of the flexible connecting plate to connect with the dovetail grooves.

[0009] In a further improved design, the flexible connecting plate has outwardly extending side protrusions on its front and rear sides, which are tightly attached to both sides of the support plate and are fastened together by bolts.

[0010] A further improved solution is that a water outlet pipe is installed on one side of the water pump outlet end, and a water inlet pipe is installed at the bottom of the water pump. The water inlet pipe is embedded in the inner side of the support plate and connected to the support pipe.

[0011] In a further improved design, the flexible connecting plate is made of elastic silicone or rubber.

[0012] By adopting the above technical solution, the present invention has the following advantages: Improved waterproofing performance: The invention features a simple and ingenious structure. Dovetail grooves are provided on both sides of the support plate, and dovetail tenons are provided on both sides of the flexible connecting plate for mortise and tenon connection. At the same time, the side protrusions are tightly attached to both sides of the support plate and locked with bolts. This dual connection method, combining mortise and tenon connection and bolt locking, achieves effective sealing between the support plates, greatly improving the waterproofing and water-stopping effect. Moreover, by utilizing the flexibility of the flexible connecting plate, it can adapt to the curved inner wall of the foundation pit, allowing each support plate to flexibly adjust its position to fit the inner wall of the foundation pit with different curvatures, thereby improving the applicability and adaptability of the device. Simultaneous support and dewatering: The present invention sets up an inclined filter plate and a water filtration chamber between the support plate and the short vertical plate, which is connected to the water pump through the support pipe. During operation, the mud and water enter the water filtration chamber after being filtered by the inclined filter plate, and then are pumped out by the water pump. This design allows the device to carry out dewatering operations simultaneously while providing support, without the need for additional dewatering equipment, thus simplifying the construction process. Moreover, this invention adopts a triangular support structure combined with a double-fixing design: the support plate and the short vertical plate are connected by a support pipe to form a triangular support, the short nails of the lower fixing structure are inserted into the soil at the bottom of the foundation pit to achieve initial fixation, and the long nails of the upper ground nail assembly are fixed to the ground at the top of the foundation pit to form a secondary fixation. This double-fixing structure, one above and one below, greatly improves the overall anti-overturning ability and structural stability of the device. At the same time, the support pipe not only has a supporting function, but can also directly extract mud and water inside the filter chamber, playing a dual role. Attached Figure Description

[0013] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the connection structure between the flexible connecting plate and the support plate of the present invention; Figure 3 This is a schematic diagram of the connection structure of the water pump, support pipe, inclined filter plate and filter chamber of the present invention; Figure 4 This is a schematic diagram of the installation structure of the side sealing plate of the present invention; Figure 5 This is a schematic diagram of the fixing structure of the present invention; Figure 6 This is a schematic diagram of the combined structure of multiple support plates of the present invention; In the diagram: 1. Support plate; 2. Short upright plate; 21. Lower fixed structure; 210. Embedded groove; 211. Telescopic rod; 212. Horizontal plate; 213. Short nail; 3. Connecting base plate; 4. Upper ground nail assembly; 41. Rotating rod; 42. Long nail; 5. Support pipe; 6. Inclined filter plate; 61. Filter hole; 7. Filter chamber; 71. Side sealing plate; 9. Dovetail groove; 10. Water pump; 101. Water outlet pipe; 102. Water inlet pipe; 12. Flexible connecting plate; 13. Side protrusion; 14. Dovetail tenon. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0015] like Figures 1-6As shown, this invention provides a construction device for dewatering and supporting deep foundation pits, including support plates 1 and short vertical plates 2 arranged at intervals. A connecting base plate 3 is fixed between the bottoms of the support plates 1 and the short vertical plates 2, forming a U-shaped frame structure that can be directly placed in the foundation pit and provide stable support. A support pipe 5 connects the support plates 1 and the short vertical plates 2, forming a triangular support structure to enhance structural strength. An inclined filter plate 6 is fixedly installed on the upper side of the connecting base plate 3, facing the short vertical plate 2, and a water filtration chamber 7 is formed on the lower side of the inclined filter plate 6. The bottom end of the support pipe 5 is fixedly inserted through the inclined filter plate 6, and the inclined filter plate 6 has filter holes 61 that communicate with the water filtration chamber 7, which can filter and collect the mud and water in the foundation pit. A water pump 10 is installed on the top of the support plate 1. The pumping end of the water pump 10 is connected to the upper end of the support pipe 5, and the lower end of the support pipe 5 is connected to the water filtration chamber 7. The water is then transported through the support pipe 5 to the water pump 10 for extraction, realizing the functions of simultaneous support and dewatering.

[0016] The support plate 1 is equipped with an upper ground nail assembly 4, which is used to fix the support plate 1 to the ground around the top of the pit. The upper ground nail assembly 4 includes multiple rotating rods 41 rotatably mounted on both sides of the top of the support plate 1. Multiple long nails 42 are inserted through the rotating rods 41. The angle can be adjusted by flexibly rotating the rotating rods 41. The long nails 42 are fixed to the ground around the top of the pit, forming an upper fixing point. The short vertical plate 2 is equipped with a lower fixing structure 21 on its lower side, which includes an embedded groove 210, a telescopic rod 211, a horizontal plate 212, and short nails 213. The horizontal plate 212 is installed at the bottom of the telescopic rod 211, and multiple short nails 213 are fixed to the bottom of the pit and driven into the soil. This structure provides a lower fixing support point and, together with the upper ground nail assembly 4, achieves double fixing from top to bottom, effectively preventing displacement or tilting of the bottom of the device and enhancing the overall stability.

[0017] Side sealing plates 71 are installed on the left and right sides of the short vertical plate 2, the inclined filter plate 6, and the connecting base plate 3. These side sealing plates 71 are used to seal the two sides of the water filter chamber 7 to prevent mud and water from flowing out or leaking from the side of the water filter chamber, ensuring that the water filter chamber forms an independent closed space. This allows water in the foundation pit to enter the water filter chamber 7 only through the filter holes 61 on the inclined filter plate 6, preventing larger stones or impurities from entering the water filter chamber 7 and blocking the support pipe 5, thus reducing the impact on the pumping structure.

[0018] Furthermore, a water outlet pipe 101 is installed on one side of the water outlet end of the water pump 10 to discharge the pumped water to the outside of the foundation pit, and a water inlet pipe 102 is installed at the bottom of the water pump 10. The water inlet pipe 102 is embedded in the inner side of the support plate 1 and connected to the support pipe 5 to transport the filtered mud and water in the water filter chamber 7 to the water pump 10 for pumping operation.

[0019] In this embodiment, flexible connecting plates 12 are locked to both sides of the support plate 1. The flexible connecting plates 12 realize the airtight combination between the support plates 1 and the position adjustment between the support plates 1. Specifically, dovetail grooves 9 are vertically opened on the left and right sides of the support plate 1, and dovetail tenons 14 are provided on the left and right sides of the flexible connecting plate 12 to be tenoned and mortised to the dovetail grooves 9. The tenon and mortise structure makes the flexible connecting plate 12 and the support plate 1 form a reliable interlocking connection, realizes rapid assembly and positioning, enhances the connection strength and integrity between the support plates, and also facilitates later disassembly, maintenance and replacement. Furthermore, the front and rear sides of the flexible connecting plate 12 are provided with outwardly extending side protrusions 13. The side protrusions 13 are closely attached to the sides of the support plate 1 and are locked with bolts. The design of the side protrusions increases the contact area between the flexible connecting plate 12 and the support plate 1. With the bolt locking, the connection strength and sealing effect are further enhanced, effectively preventing water seepage at the plate joints, and at the same time playing a role in covering and protecting the edges of the support plate 1.

[0020] The flexible connecting plate 12 is made of elastic silicone or rubber. Elastic silicone or rubber has good flexibility and bendability. When facing the inner wall of the foundation pit with curvature, the flexible connecting plate 12 can undergo adaptive deformation, allowing each support plate 1 to flexibly adjust its position and angle, thereby achieving good fit with the inner wall of the foundation pit with different curvatures and improving the support effect. Moreover, the elastic material has good resilience and compressibility. When connected by bolts, the flexible connecting plate 12 can tightly fill the gaps between the support plates 1 to form an effective sealing layer, significantly improving the waterproof and water-stopping effect and preventing leakage at the plate joints. In addition, the underground construction environment has various vibrations and impacts. The flexible connecting plate of elastic material can play a good role in shock absorption and buffering, reducing the impact of external vibrations on the support structure and improving the overall stability and durability of the device.

[0021] In a more specific implementation, when the present invention is used for fixing, one side of the support plate 1 is tightly attached to the inner wall of the foundation pit. Then, the telescopic rod 211 of the lower fixing structure 21 extends out, allowing the short nails 213 on the horizontal plate 212 to be directly inserted into the soil at the bottom of the foundation pit for initial fixing. Then, in conjunction with the use of the ground nail assembly 4, the two rotating rods 41 are flexibly rotated to the required positions, and the long nails 42 are pressed against the ground around the upper side of the foundation pit, thereby forming a secondary fixing and realizing a stable fixing structure of the device with one up and one down. Furthermore, since the support plate 1, the short vertical plate 2, and the connecting bottom plate 3 form a U-shaped frame structure, this also allows for direct... The device is placed directly in the pit, making it less prone to tipping over. Furthermore, a support pipe 5 further connects the support plate 1 and the short vertical plate 2, forming a triangular support structure that strengthens the overall structural strength of the device. Simultaneously, an inclined filter plate 6 and a water filtration chamber 7 are installed on one side of the short vertical plate 2. The inclined filter plate 6 not only filters larger stones or impurities but also supports the support pipe 5. The cavity of the support pipe 5 is connected to the water filtration chamber 7. Thus, while strengthening the structural strength between the support plate 1 and the short vertical plate 2, the support pipe 5 can also work with the pump 10 to extract the mud and water from the water filtration chamber 7, achieving dewatering within the pit. In addition, the various support plates 1 can be combined with flexible connecting plates 12. In specific use, the dovetail tenons 14 on both sides of the flexible connecting plate 12 are respectively inserted into the dovetail grooves 9 of the two support plates 1 to achieve a preliminary mortise and tenon joint connection. Then, the side protrusions 13 of the flexible connecting plate 12 can fit against the front and rear edges of the left and right sides of the support plate 1, and then be locked with bolts to further enhance the connection effect between the flexible connecting plate 12 and the support plate 1, and make the sealing between them more secure and less prone to water leakage. Moreover, by utilizing the characteristics of the flexible connecting plate 12, when facing the inner wall of the foundation pit with a curved arc, the flexible connecting plate 12 can undergo adaptive deformation, allowing the various support plates 1 to flexibly adjust their positions to adapt to the inner wall of the foundation pit, thereby greatly improving the efficiency and effectiveness of use.

[0022] It should be noted that the construction device for dewatering and supporting deep foundation pits of the present invention mainly improves the above-mentioned structure. The functions, components and structures not mentioned can be implemented by using existing components and structures that can achieve the corresponding functions. For example, each telescopic rod can be used by existing pneumatic telescopic cylinders, hydraulic telescopic cylinders or electric push rods.

[0023] The above embodiments illustrate and describe the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A construction device for dewatering and supporting deep foundation pits, characterized in that, It includes a support plate (1) and a short upright plate (2) arranged at intervals. A connecting base plate (3) is fixed between the bottom of the support plate (1) and the short upright plate (2) to form a U-shaped frame structure. A support pipe (5) is connected between the support plate (1) and the short upright plate (2) to form a triangular support structure. The upper side of the connecting base plate (3) is inclined and fixed to the short vertical plate (2), and the lower side of the inclined filter plate (6) forms a water filtration chamber (7). The bottom end of the support pipe (5) is fixed through the inclined filter plate (6), and the inclined filter plate (6) is provided with a filter hole (61) that communicates with the water filtration chamber (7). A water pump (10) is installed on the top of the support plate (1). The water pump (10) is connected to the upper end of the support pipe (5), and the lower end of the support pipe (5) is connected to the filter chamber (7). Flexible connecting plates (12) are locked to both sides of the support plate (1).

2. The construction device for dewatering and supporting deep foundation pits according to claim 1, characterized in that, The lower side of the short upright plate (2) is provided with a lower fixing structure (21). The lower fixing structure (21) includes an embedding groove (210) opened on the bottom surface of the short upright plate (2) and a plurality of telescopic rods (211) installed vertically inside the short upright plate (2). A horizontal plate (212) is installed at the bottom telescopic end of the telescopic rod (211). A plurality of short nails (213) are fixed on the lower side of the horizontal plate (212) for nailing into the soil at the bottom of the foundation pit.

3. The construction device for dewatering and supporting deep foundation pits according to claim 2, characterized in that, The top of the support plate (1) is equipped with an upper ground nail assembly (4), which is fixed to the ground around the top of the pit. The upper ground nail assembly (4) includes multiple rotating rods (41) rotatably mounted on both sides of the top of the support plate (1). Multiple long nails (42) are inserted through the rotating rods (41), which are fixed to the ground around the top of the pit.

4. The construction device for dewatering and supporting deep foundation pits according to claim 3, characterized in that, Side sealing plates (71) are installed on the left and right sides of the short vertical plate (2), the inclined filter plate (6) and the connecting bottom plate (3). The side sealing plates (71) are used to seal the two sides of the water filter chamber (7).

5. A construction device for dewatering and supporting deep foundation pits according to claim 4, characterized in that, The support plate (1) has vertical dovetail grooves (9) on its left and right sides respectively, and the flexible connecting plate (12) has dovetail tenons (14) on its left and right sides that are mortised and tenoned with the dovetail grooves (9).

6. The construction device for dewatering and supporting deep foundation pits according to claim 5, characterized in that, The flexible connecting plate (12) has outwardly extending side protrusions (13) on its front and rear sides respectively. The side protrusions (13) are closely attached to both sides of the support plate (1) and are fastened by bolts.

7. A construction device for dewatering and supporting deep foundation pits according to claim 6, characterized in that, The water pump (10) has an outlet pipe (101) installed on one side of the outlet end, and an inlet pipe (102) installed at the bottom of the water pump (10). The inlet pipe (102) is embedded in the inner side of the support plate (1) and connected to the support pipe (5).

8. A construction device for dewatering and supporting deep foundation pits according to claim 7, characterized in that, The flexible connecting plate (12) is made of elastic silicone or rubber.

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