A foundation pit dewatering device and method

Abstract

The present invention discloses a foundation pit dewatering device and method, including a dewatering foundation pit. A first mounting seat is fixedly attached to the bottom of the foundation pit by bolts. A cross beam is screwed and attached to the surface of the first mounting seat. A first support plate is fixedly attached to the surface of the cross beam by bolts. Support beams are symmetrically arranged along the length direction on the side surface of the cross beam. One end of the support beam away from the cross beam is open. A telescopic beam is arranged inside the support beam. A driving assembly for driving the telescopic beam to expand and contract is installed inside the support beam, and a second support plate is fixedly attached to the outside of the telescopic beam through the opening of the support beam. Beneficial effects: The distance between the first support plate and the second support plate can be adjusted according to the needs of the foundation pit to meet the requirements of foundation pit support and reduce the soil loss on the inner wall of the foundation pit during dewatering operations. In addition, a filtering assembly is provided between the first mounting seat and the second mounting seat, which can enable the water at the inner wall of the foundation pit to slowly flow to the extraction area through the water holes, and at the same time block the flow of soil impurities.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit dewatering, and particularly relates to a foundation pit dewatering device and method. Background Art

[0002] The excavation of a foundation pit is a high-risk construction project. In the excavation of a foundation pit under water-rich geological conditions, due to the seriously insufficient bearing capacity of the soil and the high water level, if no safe and effective support and dewatering measures are taken, it is extremely easy to cause collapse and burial accidents. Therefore, to ensure project safety and environmental safety, it is particularly important to improve the dewatering efficiency and support level of the foundation pit.

[0003] Most of the existing foundation pit support devices do not have an adjustment structure, cannot be adjusted according to the width of the foundation pit, etc., and are not convenient for installation, and cannot well meet people's usage requirements; and during dewatering, due to the seriously insufficient bearing capacity of the soil and the high water level, it is easy to cause collapse and burial accidents. Summary of the Invention

[0004] The purpose of the present invention is to provide a foundation pit dewatering device and method, which can adjust the distance between the first support plate and the second support plate according to the needs of the foundation pit to meet the requirements of foundation pit support and reduce the soil loss on the inner wall of the foundation pit during dewatering operations; in addition, a filtering component is provided between the first mounting seat and the second mounting seat, which can make the water at the inner wall of the foundation pit slowly flow to the extraction area through the water holes, and at the same time can block the flow of soil impurities.

[0005] The technical solution of the present invention is realized as follows:

[0006] A foundation pit dewatering device includes a dewatering foundation pit. A first mounting seat is fixed to the bottom of the foundation pit by bolts. A cross beam is screwed to the surface of the first mounting seat, and a first support plate is fixed to the surface of the cross beam by bolts.

[0007] Support beams are symmetrically arranged along the length direction on the side of the cross beam. One end of the support beam away from the cross beam is open. A telescopic beam is arranged inside the support beam. A driving component for driving the telescopic beam to expand and contract is installed inside the support beam, and a second support plate is fixed to the outside of the support beam through the opening of the telescopic beam. The bottom end of the telescopic beam is fixed to the bottom of the foundation pit through a second mounting seat. Support components matching the inner wall of the foundation pit are installed on the sides of the first support plate and the second support plate.

[0008] The tops of the first support plate and the second support plate are connected by a fixing plate. A water pump is installed on the top of the fixing plate. One end of the water pump is connected to a dewatering pipe, and the other end is connected to a reservoir outside the foundation pit through a water outlet pipe. A filtering component is provided between the first mounting seat and the second mounting seat.

[0009] Further, the driving assembly includes a telescopic oil cylinder installed in the support beam, and the output end of the telescopic oil cylinder is fixedly connected to one end of the telescopic beam through a connecting block.

[0010] Further, sliders are provided at both ends of the connecting block, and the sliders are slidably matched with the waist-shaped grooves formed on the side surface of the support beam.

[0011] Further, the support member includes support cylinders installed on the side surfaces of the first support plate and the second support plate. A support rod is threadedly connected inside the support cylinder. One end of the support rod away from the support cylinder is connected to a support plate through a bearing, and the support plate is fixedly connected to the support plate on the inner wall of the foundation pit through soil nails.

[0012] Further, there are two groups of the support members, which are respectively arranged along the height directions of the first support plate and the second support plate.

[0013] Further, the filtering assembly includes a filter mesh plate. Embedding grooves are formed at both ends of the filter mesh plate, and the filter mesh plate is slidably matched with the plug-in plates on the first mounting seat and the second mounting seat through the embedding grooves.

[0014] Further, a plurality of water holes are formed on the side surfaces of the first mounting seat and the second mounting seat, and the water holes are located below the filter mesh plate.

[0015] A foundation pit dewatering method includes the following steps:

[0016] S1: Fix the first mounting seat to the bottom of the foundation pit through bolts, screw a cross beam on the surface of the first mounting seat, and bolt the first support plate to the cross beam.

[0017] S2: Symmetrically install support beams on the side of the cross beam, turn on the telescopic oil cylinder, and drive the telescopic beam installed inside the support beam to extend outside through the telescopic oil cylinder.

[0018] S3: The bottom of the telescopic beam is fixed to the bottom of the foundation pit through the second mounting seat, the top of the telescopic beam is bolted with the second support plate, and a filter mesh plate is installed between the first mounting seat and the second mounting seat.

[0019] S4: Fix the support plate on the inner wall of the foundation pit through the support member.

[0020] S5: Install a fixing plate between the first support plate and the second support plate, and install a water pump. The water inlet pipe connected to the input end of the water pump extends above the filter mesh plate, the outlet pipe is connected to a reservoir outside the foundation pit, and turn on the water pump to perform dewatering operation on the foundation pit.

[0021] The beneficial effects of the present invention are as follows: A support beam is provided on the side of the cross beam. A telescopic oil cylinder is installed inside the support beam. The output end of the telescopic oil cylinder is connected to a telescopic beam. The telescopic beam can extend to the outside through the opening of the support beam, and a second support plate is installed through the telescopic beam. The distance between the first support plate and the second support plate can be adjusted according to the needs of the foundation pit to meet the requirements of foundation pit support, and reduce the soil loss on the inner wall of the foundation pit during the dewatering operation. In addition, a filtering component is provided between the first mounting seat and the second mounting seat, which can make the water at the inner wall of the foundation pit slowly flow to the extraction area through the water holes, and at the same time can block the flow of soil impurities, playing a good static dewatering effect on the dewatering area and the periphery at the bottom of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 Schematic diagram of a foundation pit dewatering device;

[0024] Figure 2 Partial top view of a foundation pit dewatering device;

[0025] Figure 3 For Figure 2 Enlarged view of part A in

[0026] Figure 4 For Figure 1 Enlarged view of part B in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0029] According to an embodiment of the present invention, a foundation pit dewatering device and method are provided.

[0030] Referring toFigures 1-4 , according to the foundation pit dewatering device and method of the embodiments of the present invention, including a dewatering foundation pit 1, a first mounting seat 2 is fixed to the bottom of the foundation pit 1 by bolts, a cross beam 3 is screwed to the surface of the first mounting seat 2, and a first support plate 4 is fixed to the surface of the cross beam 3 by bolts.

[0031] Support beams 5 are symmetrically arranged on the side of the cross beam 3 along its length direction. One end of the support beam 5 away from the cross beam 3 is open. A telescopic beam 6 is arranged in the support beam 5. A driving component 7 for driving the telescopic beam 6 to expand and contract is installed in the support beam 5. The telescopic beam 6 extends to the outside through the opening of the support beam 5 and a second support plate 8 is fixed. The bottom end of the telescopic beam 6 is fixed to the bottom of the foundation pit 1 through a second mounting seat 9. Support components 10 that cooperate with the inner wall of the foundation pit 1 are installed on the sides of the first support plate 4 and the second support plate 8.

[0032] The tops of the first support plate 4 and the second support plate 8 are connected by a fixing plate 11. A water pump 12 is installed on the top of the fixing plate 11. One end of the water pump 12 is connected to a dewatering pipe 13, and the other end is communicated with a reservoir outside the foundation pit 1 through a water outlet pipe 14. A filtering component 15 is arranged between the first mounting seat 2 and the second mounting seat 9.

[0033] Refer to Figures 1-2 , the cross beam 3 is fixed on the first mounting seat 2, and the first support plate 4 is fixed by bolts through the cross beam 3. The first mounting seat 2 is fixed to the bottom of the foundation pit 1 by bolts, which is convenient for disassembly and installation.

[0034] In addition, support beams 5 are arranged on the side of the cross beam 3. A driving component 7 is installed in the support beam 5. The driving component 7 is connected to the telescopic beam 6. The telescopic beam 6 can extend to the outside through the opening of the support beam 5, and a second support plate 8 is installed through the telescopic beam 6, which can be adjusted according to the width of the foundation pit 1 to meet the support requirements of the foundation pit 1. Finally, the inner wall of the foundation pit 1 is supported by the support components 10 installed on the first support plate 4 and the second support plate 8 to avoid serious insufficient bearing capacity of the soil and high water level, resulting in collapse and burial accidents.

[0035] In addition, a filtering component 15 is arranged between the first mounting seat 2 and the second mounting seat 9, which can prevent the bottom mud or impurities from blocking the dewatering pipe 13.

[0036] Further, the driving component 7 includes a telescopic oil cylinder 71 installed in the support beam 5. The output end of the telescopic oil cylinder 71 is fixedly connected to one end of the telescopic beam 6 through a connecting block 72.

[0037] Further, sliding blocks 73 are arranged at both ends of the connecting block 72. The sliding blocks 73 are slidably matched with waist-shaped grooves 74 opened on the side of the support beam 5.

[0038] Refer toFigure 1 and Figure 2 As shown in Figure 2 , in this embodiment, the output end of the telescopic oil cylinder 71 drives the telescopic beam 6 to move along its length direction within the support beam 5 through the connecting block 72. Sliders 73 are provided at both ends of the connecting block 72 and are in sliding fit with the waist-shaped grooves 74, improving the stability of the telescopic beam 6 during telescoping.

[0039] Furthermore, the support component 10 includes a support cylinder 10a installed on the sides of the first support plate 4 and the second support plate 8. A support rod 10b is threadedly connected within the support cylinder 10a. One end of the support rod 10b away from the support cylinder 10a is connected to a support plate 10c through a bearing. The support plate 10c is fixedly connected to the support plate 16 on the inner wall of the foundation pit 1 through soil nails.

[0040] Referring to Figure 1 As shown in Figure 1 , in this embodiment, the support cylinder 10a is bolted to the sides of the first support plate 4 and the second support plate 8 through the base at the bottom, and the support rod 10b is threadedly connected through the threaded groove inside it, used to precisely adjust the distance between the support rod 10b and the inner wall of the foundation pit 1, so that the support plate 10c connected to the support rod 10b abuts against the support plate 16 on the inner wall of the foundation pit 1.

[0041] Then, through the soil nails, the support plate 10c and the support plate 16 on the inner wall of the foundation pit 1 are fixed, thus effectively supporting the foundation pit 1, facilitating the drainage operation of the accumulated water in the foundation pit, and preventing more soil from entering the foundation pit 1.

[0042] Furthermore, there are two groups of the support components 10, which are respectively arranged along the height directions of the first support plate 4 and the second support plate 8.

[0043] Referring to Figure 1 As shown in Figure 1 , by arranging two groups of support components 10 along the height directions of the first support plate 4 and the second support plate 8, the support area on the side of the foundation pit 1 can be increased, and the stability of supporting the foundation pit 1 can be further improved.

[0044] Furthermore, the filtering assembly 15 includes a filter mesh plate 15a. Embedding grooves 15b are opened at both ends of the filter mesh plate 15a, and the filter mesh plate 15a is in sliding fit with the plug-in plates on the first mounting seat 2 and the second mounting seat 9 through the embedding grooves 15b.

[0045] Referring to Figure 1 and 4 As shown in 4 , in this embodiment, by setting the filter mesh plate 15a, it can be avoided that the water inside the foundation pit 1 drives the soil or impurities to flow during the pumping process, thus causing blockage of the drain pipe 13 and improving the pumping efficiency.

[0046] Further, a plurality of water holes are formed in the sides of the first mounting base 2 and the second mounting base 9, and the water holes are located below the filter screen plate 15a.

[0047] Referring to Figure 1 , in this embodiment, by forming a plurality of water holes in the sides of the first mounting base 2 and the second mounting base 9, the water at the inner wall of the foundation pit 1 can slowly flow to the extraction area through the water holes, and at the same time, the flow of soil impurities can be blocked.

[0048] A method for dewatering a foundation pit includes the following steps:

[0049] S1: Fix the first mounting base 2 to the bottom of the foundation pit 1 by bolts, screw the cross beam 3 on the surface of the first mounting base 2, and bolt the first support plate 4 to the cross beam 3;

[0050] S2: Symmetrically install the support beams 5 on the side of the cross beam 3, turn on the telescopic oil cylinder 71, and drive the telescopic beam 6 installed inside the support beam 5 to extend to the outside thereof through the telescopic oil cylinder 71;

[0051] S3: The bottom of the telescopic beam 6 is fixed to the bottom of the foundation pit 1 through the second mounting base 9, the top of the telescopic beam 6 is bolted with the second support plate 8, and the filter screen plate 15a is installed between the first mounting base 2 and the second mounting base 9;

[0052] S4: Fix the support plate 16 on the inner wall of the foundation pit 1 through the support member 10;

[0053] S5: Install a fixing plate 11 between the first support plate 4 and the second support plate 8, and install a water pump 12, so that the downcomer 13 connected to the input end of the water pump 12 extends above the filter screen plate 15a, the outlet pipe 14 is communicated with a reservoir outside the foundation pit 1, and turn on the water pump 12 to perform dewatering operation on the foundation pit 1.

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A foundation pit dewatering method, including a dewatering foundation pit (1), characterized in that, A first mounting base (2) is fixed to the bottom of the foundation pit (1) by bolts. A cross beam (3) is screwed to the surface of the first mounting base (2). A first support plate (4) is fixed to the surface of the cross beam (3) by bolts; Support beams (5) are symmetrically arranged on the side surface of the cross beam (3) along its length direction. One end of the support beam (5) away from the cross beam (3) is open. A telescopic beam (6) is arranged in the support beam (5). A driving assembly (7) for driving the telescopic beam (6) to expand and contract is installed in the support beam (5). The driving assembly (7) is connected to the telescopic beam (6). The telescopic beam (6) extends to the outside through the opening of the support beam (5), and a second support plate (8) is installed through the telescopic beam (6). The bottom end of the telescopic beam (6) is fixed to the bottom of the foundation pit (1) through a second mounting base (9). Support components (10) matched with the inner wall of the foundation pit (1) are installed on the side surfaces of the first support plate (4) and the second support plate (8); The tops of the first support plate (4) and the second support plate (8) are connected by a fixing plate (11). A water pump (12) is installed on the top of the fixing plate (11). One end of the water pump (12) is connected to a water lowering pipe (13), and the other end is communicated with a water storage tank outside the foundation pit (1) through a water outlet pipe (14). A filtering assembly (15) is arranged between the first mounting base (2) and the second mounting base (9); The support component (10) includes a support cylinder (10a) installed on the side surfaces of the first support plate (4) and the second support plate (8). A support rod (10b) is threadedly connected in the support cylinder (10a). One end of the support rod (10b) away from the support cylinder (10a) is connected to a support plate (10c) through a bearing. The support plate (10c) is fixedly connected to a support plate (16) on the inner wall of the foundation pit (1) through a soil nail; The filtering assembly (15) includes a filter mesh plate (15a). Insertion plates (15b) are opened at both ends of the filter mesh plate (15a), and the filter mesh plate (15a) is slidably matched with insertion plates on the first mounting base (2) and the second mounting base (9) through the insertion plates (15b); The following steps are further included: S1: Fix the first mounting base (2) to the bottom of the foundation pit (1) by bolts, screw the cross beam (3) to the surface of the first mounting base (2), and fix the first support plate (4) to the cross beam (3) by bolts; S2: Symmetrically install the support beams (5) on the side surface of the cross beam (3), and start the driving assembly (7) to drive the telescopic beam (6) installed inside the support beam (5) to extend to the outside; S3: The bottom of the telescopic beam (6) is fixed to the bottom of the foundation pit (1) through the second mounting base (9), the top of the telescopic beam (6) is fixed to the second support plate (8) by bolts, and install the filter mesh plate (15a) between the first mounting base (2) and the second mounting base (9); S4: Fix the support plate (16) on the inner wall of the foundation pit (1) through the support component (10); S5: A fixing plate (11) is installed between the first support plate (4) and the second support plate (8), and a water pump (12) is installed such that the downcomer pipe (13) connected to the input end of the water pump (12) extends above the filter screen plate (15a), the outlet pipe (14) communicates with a reservoir outside the foundation pit (1), and the water pump (12) is turned on to perform dewatering operation on the foundation pit (1).

2. The method for dewatering a foundation pit according to claim 1, characterized in that, The driving assembly (7) includes a telescopic oil cylinder (71) installed in the support beam (5), and the output end of the telescopic oil cylinder (71) is fixedly connected to one end of the telescopic beam (6) through a connecting block (72).

3. A foundation pit dewatering method according to claim 2, characterized in that, Sliders (73) are provided at both ends of the connecting block (72), and the sliders (73) are slidably matched with the waist-shaped grooves (74) opened on the side surface of the support beam (5).

4. A foundation pit dewatering method according to claim 1, characterized in that, There are two groups of the support components (10), which are respectively arranged along the height directions of the first support plate (4) and the second support plate (8).

5. A foundation pit dewatering method according to claim 1, characterized in that, A plurality of water holes are opened on the side surfaces of the first mounting seat (2) and the second mounting seat (9), and the water holes are located below the filter screen plate (15a).

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