Water-rich stratum foundation pit excavation method and device

Abstract

The invention relates to the technical field of foundation pit excavation, in particular to a water-rich stratum foundation pit excavation method and device which comprises pressing ribs and further comprises a protection assembly. The protection assembly comprises a bottom plate, a lap joint plate, an abutting side plate, a communicating component and a supporting component. A plurality of bottom plates are arranged at the bottom of the slope, each bottom plate is provided with a lap joint plate, a plurality of lap joint plates are sequentially arranged above the lap joint plates arranged on the bottom plates in a lap joint mode, the back sides of the bottom plates and the back sides of the lap joint plates abut against the surface of the slope, abutting side plates are fixedly installed on the side edges of the bottom plates and the side edges of the lap joint plates, and the abutting side plates abut against the pressing ribs in a matched mode. The communication component is connected with the lap joint plate, the supporting component is connected with the bottom plate, accumulated water at the bottom of a foundation pit and redundant water in soil on the side edge of a side slope can be rapidly collected and guided by combining the arranged foundation pit excavation device with a corresponding side slope protection structure, and therefore dryness in the foundation pit and stability of the whole foundation pit excavation operation can be guaranteed conveniently.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foundation pit excavation, in particular to a water-rich stratum foundation pit excavation method and device. BACKGROUND

[0002] As an important construction process in civil engineering, foundation pit excavation mainly involves excavation methods, principles, matters needing attention and safety protection measures, etc. In order to ensure the overall processing efficiency, the existing foundation pit excavation is mostly operated by mechanical excavation device, for example, a back-down and forced soil-cutting reverse shovel excavator, which can be matched with a self-unloading vehicle to load and transport soil, or to discard soil near the pit groove. For water-rich stratum foundation pit excavation, detailed geological survey of the location of the foundation pit must be carried out, including the type, distribution and thickness of the soil layer, the physical and mechanical properties of each soil layer (such as bearing capacity and shear strength), and the underground water level and its change. In water-rich stratum, the underground water level is usually high, and the soil permeability may be large, so special attention should be paid. Because the water content in the soil is heavy during the water-rich stratum foundation pit excavation, the water in the soil on the side of the foundation pit is easy to overflow and accumulate in the foundation pit. At this time, the construction personnel need to use water pumps or dig drainage channels and drainage channels to drain water. When using water pumps to absorb water at the bottom of the foundation pit, the absorption range is small and it is very inconvenient to arrange the absorption points. Using drainage channels and drainage channels requires additional operation and design by construction personnel, so that the existing foundation pit excavation device cannot quickly and conveniently absorb and process the water in the soil inside and on the side of the foundation pit. SUMMARY

[0003] The purpose of the present application is to provide a water-rich stratum foundation pit excavation method and device, which can quickly collect and guide the excess water in the soil on the side of the slope and at the bottom of the foundation pit by setting the foundation pit excavation device combined with the corresponding slope protection structure, so as to ensure the dryness of the foundation pit and the stability of the entire foundation pit excavation operation.

[0004] To achieve the above purpose, the present application provides a water-rich stratum foundation pit excavation device, which comprises a pressure bar and a protection assembly; the protection assembly comprises a bottom plate, a lap plate, an abutting side plate, a communication member and a supporting member; A plurality of the bottom plates are arranged at the bottom of the slope, each of the bottom plates is provided with the overlapping plate, a plurality of the overlapping plates are sequentially overlapped above the overlapping plate arranged on the bottom plate, the bottom plate and the back side of the overlapping plate are in abutment with the surface of the slope, the bottom plate and the side edge of the overlapping plate are fixedly installed with the abutment side plate, the abutment side plate is in abutment with the pressing rib, the communication component is connected with the overlapping plate, and the communication between the plurality of bottom plates and the overlapping plates is realized, and the supporting component is connected with the bottom plate to strengthen the supporting stability of the whole bottom plate and the overlapping plate.

[0005] The communication component comprises a through branch pipe, a fine slit plate and an attraction component, the through branch pipe is fixedly installed at the bottom of the overlapping plate, the bottom plate and the overlapping plate are fixedly installed with a plurality of the fine slit plates on the front and back sides, and the attraction component is connected with the bottom plate to guide the accumulated water in the bottom plate.

[0006] The supporting component comprises a supporting frame and a reinforcing support, the supporting frame is fixedly installed in the bottom plate, and the reinforcing support is fixedly installed in the overlapping plate.

[0007] The attraction component comprises a concentrated leakage box, a main pipe and an overlapping pipe, the concentrated leakage box is fixedly installed at the bottom of the bottom plate, the main pipe is connected with the concentrated leakage box and fixedly installed in the bottom plate, and the overlapping pipe is fixedly installed in the overlapping plate.

[0008] The protection assembly further comprises a locking block, a locking groove plate, a clamping component and a manual control component, the bottom plate and the overlapping plate are fixedly installed with the locking block on the top of the two sides, the overlapping plate is fixedly installed with the locking groove plate on the bottom of the two sides, the clamping component is connected with the locking groove plate to limit and lock the locking block matched with the locking groove plate, and the manual control component is connected with the overlapping plate to assist the operator to quickly release the locking of the clamping component.

[0009] The clamping component comprises a stop block and an extrusion spring, the stop block is slidingly installed in the locking groove plate, and the two sides of the extrusion spring are connected with the stop block and the locking groove plate.

[0010] The manual control component comprises a sliding cover, a side guide column and a driving screw rod, the sliding cover is slidingly installed on the locking groove plate, the side guide column is fixedly installed on the side of the stop block close to the sliding cover, and the driving screw rod is threadedly connected with the sliding cover and rotationally installed in the locking groove plate.

[0011] The manual control component further includes a linkage bevel gear, a turning shaft, a drive bevel gear, and a turning cap. The linkage bevel gear is fixedly connected to the drive screw and is located at the top of the drive screw. The turning shaft is rotatably installed in the locking groove plate. The drive bevel gear meshes with the linkage bevel gear and is fixedly sleeved on the turning shaft. The turning cap is fixedly installed on one side of the turning shaft.

[0012] One method for excavating a foundation pit in water-rich strata, using the aforementioned excavation device, includes the following steps. Multiple base plates are laid at specified intervals at the bottom of the slope; By setting ribs to contact the abutting side plates on the side of the base plate, multiple base plates are pressed tightly against the bottom of the slope; Each of the pressed base plates is provided with a lap plate, and then, in the same way as fixing the base plate, the lap plate is pressed by setting the pressure rib in conjunction with the abutting side plate on the side of the lap plate; After the overlapping plate above the base plate is pressed and fixed, multiple layers of overlapping plates are installed and fixed on top of the overlapping plate in sequence, referring to the installation method of the overlapping plate above the base plate, until the top overlapping plate completes the support for the top of the slope. After the base plate and the overlapping plate are installed, the base plate and the overlapping plate are connected by the connecting components. An external water pump is used in conjunction with the connecting component to draw out and drain excess water that has seeped into the base plate and the overlapping plate, as well as excess water that has accumulated at the bottom of the pit.

[0013] This invention discloses a method and apparatus for excavating a foundation pit in a water-rich stratum. First, multiple base plates are laid at specified intervals at the bottom of a slope. Reinforcing ribs are then placed in contact with the abutment plates on the sides of the base plates, thereby pressing the multiple base plates tightly against the bottom of the slope. Each pressed base plate is fitted with a lap plate. Then, similar to fixing the base plates, the reinforcing ribs, in conjunction with the abutment plates on the sides of the lap plates, are used to press the lap plates together. After the lap plates above the base plates are pressed and fixed, multiple layers of lap plates are sequentially installed and fixed above the lap plates, following the installation method of the lap plates above the base plates. The overlapping plates are installed until the top overlapping plate completes the support for the top of the slope. After the bottom plate and the overlapping plate are installed, the bottom plate and the overlapping plate are connected by a connecting member. Finally, an external water pump is used in conjunction with the connecting member to draw out excess water that has seeped into the bottom plate and the overlapping plate, as well as excess water at the bottom of the pit. The pit excavation device combined with the corresponding slope protection structure can quickly collect and guide the water at the bottom of the pit and the excess water in the soil on the side of the slope, so as to ensure the dryness of the pit and the stability of the entire pit excavation operation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall structure of the foundation pit excavation device for water-rich strata of the present invention.

[0016] Figure 2 This is the invention Figure 1 Enlarged view of point A.

[0017] Figure 3 This is a cross-sectional structural diagram of the base plate and the overlapping plate of the present invention.

[0018] Figure 4 This is a schematic diagram of the inner guide groove of the sliding cover of the present invention.

[0019] Figure 5 This is a cross-sectional structural diagram of the sliding cover of the present invention.

[0020] Figure 6 This is the invention Figure 5 Enlarged view of point B.

[0021] Figure 7 This is a cross-sectional structural diagram of the locking groove plate of the present invention.

[0022] Figure 8 This is the invention Figure 7 Enlarged view of point C.

[0023] Figure 9 This is a flowchart of the method for excavating foundation pits in water-rich strata according to the present invention.

[0024] In the diagram: 1-Slope, 101-Reinforcing rib, 102-Base plate, 103-Overlap plate, 104-Abutting side plate, 201-Conducting branch pipe, 202-Narrow joint plate, 203-Centralized drainage box, 204-Main pipe, 205-Overlap pipe, 301-Support frame, 302-Reinforcing bracket, 401-Locking block, 402-Locking groove plate, 403-Stop block, 404-Extrusion spring, 501-Sliding cover, 502-Side guide post, 503-Drive screw, 504-Linkage bevel gear, 505-Turning shaft, 506-Drive bevel gear, 507-Turning cap. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated 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 the present invention, and should not be construed as limiting the present invention.

[0026] In the description of this invention, it should be understood that "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] Please see Figures 1 to 8 This invention provides a device for excavating foundation pits in water-rich strata: it includes reinforcing bars 101 and protective components. The protective components include a base plate 102, an overlapping plate 103, an abutting side plate 104, a connecting component, and a supporting component. The connecting component includes a guide branch pipe 201, a slotted plate 202, and a suction component. The supporting component includes a support frame 301 and a reinforcing bracket 302. The suction component includes a centralized drainage box 203, a main pipe 204, and an overlapping pipe 205. This solution addresses the problem of water in the soil during foundation pit excavation in water-rich strata. Because of the high water content, water in the soil on the side of the foundation pit easily overflows and accumulates inside the pit. At this time, construction workers need to use water pumps or dig drainage ditches and trenches to drain the water. However, when using water pumps to absorb water accumulated at the bottom of the foundation pit, the absorption range is small and the layout of absorption points is very inconvenient. Using drainage ditches and trenches requires extra operation and design from construction workers. This leads to the problem that existing foundation pit excavation equipment cannot quickly and conveniently absorb and treat the water in the foundation pit and the soil on the side of the foundation pit.

[0028] Furthermore, the system includes a reinforcing rib 101 and a protective component; the protective component includes a base plate 102, an overlapping plate 103, an abutting side plate 104, a connecting member, and a supporting member. Multiple base plates 102 are disposed at the bottom of the slope 1. Each base plate 102 is provided with an overlapping plate 103. Several overlapping plates 103 are sequentially overlapped above the overlapping plates 103 disposed on the base plates 102. The back sides of the base plates 102 and the overlapping plates 103 are in contact with the surface of the slope 1. The sides of the base plates 102 and the overlapping plates 103 are fixedly installed with abutting side plates 104. The abutting side plates 104 are in contact with the reinforcing ribs 101. The connecting member is connected to the overlapping plates 103 to realize the connection between the multiple base plates 102 and the overlapping plates 103. The supporting member is connected to the base plates 102 to enhance the overall support stability of the base plates 102 and the overlapping plates 103.

[0029] Furthermore, the supporting component includes a support frame 301 and a reinforcing bracket 302. The support frame 301 is fixedly installed inside the base plate 102; the reinforcing bracket 302 is fixedly installed inside the overlapping plate 103.

[0030] Specifically, both the base plate 102 and the overlapping plate 103 are hollow, and both have internal grooves for collecting water. Since both the base plate 102 and the overlapping plate 103 are hollow, in order to ensure the overall support stability of the base plate 102 and the overlapping plate 103, the support frame 301 and the reinforcing bracket 302 are fixedly installed inside both the base plate 102 and the overlapping plate 103. Both the support frame 301 and the reinforcing bracket 302 have triangular cross-sections to enhance the support strength of the base plate 102 and the overlapping plate 103. The front and rear sides of the support frame 301 and the reinforcing bracket 302 are respectively attached to the front and rear inner walls of the inner groove of the base plate 102 and the overlapping plate 103. The upper and lower sides of the support frame 301 and the reinforcing bracket 302 are respectively attached to the upper and lower inner walls of the inner groove of the base plate 102 and the overlapping plate 103. In order to ensure that the water collected at the bottom of the inner groove of the base plate 102 and the overlapping plate 103 can communicate with each other, the support frame 301 and the reinforcing bracket 302 are provided with corresponding narrow sides at the bottom without affecting the overall support strength. Multiple long seams are provided on the front and rear sides of the base plate 102 and the overlapping plate 103. Through the long seams, water seeping out of the soil of the slope 1 can enter the corresponding base plate 102 and overlapping plate 103. The bottom of the base plate 102 is also provided with corresponding strip seams so that the water accumulated inside the foundation pit can enter the interior of the base plate 102. In practical use, multiple base plates 102 are first laid at a specified interval at the bottom of the slope 1. Reinforcing ribs 101 are then placed in contact with the abutting side plates 104 on the sides of the base plates 102, thereby pressing the multiple base plates 102 tightly against the bottom of the slope 1. Each pressed base plate 102 is fitted with a lap plate. Then, in the same way as fixing the base plates 102, the reinforcing ribs 101 are used in conjunction with the abutting side plates 104 on the sides of the lap plates 103 to press the lap plates 103 tightly. After the lap plates 103 above the base plates 102 are pressed and fixed, the lap plates 103 are then installed and fixed sequentially above them, following the installation method of the lap plates 103 above the base plates 102. The overlapping plates 103 are installed in multiple layers until the top overlapping plate 103 completes the support for the top of the slope 1. After the bottom plate 102 and the overlapping plates 103 are installed, the bottom plate 102 and the overlapping plates 103 are connected by a connecting member. Finally, an external water pump is used in conjunction with the connecting member to draw out excess water that has seeped into the bottom plate 102 and the overlapping plates 103, as well as excess water at the bottom of the pit. The pit excavation device combined with the corresponding slope protection structure can quickly collect and guide the water at the bottom of the pit and the excess water in the soil on the side of the slope 1, so as to ensure the dryness of the pit and the stability of the entire pit excavation operation.

[0031] Furthermore, the guide branch pipe 201 is fixedly installed at the bottom of the overlapping plate 103; multiple slotted plates 202 are fixedly installed on both the front and rear sides of the base plate 102 and the overlapping plate 103; the suction component is connected to the base plate 102 and is used to guide the water accumulated inside the base plate 102.

[0032] Furthermore, the centralized drain box 203 is fixedly installed at the bottom of the base plate 102; the main pipe 204 is connected to the centralized drain box 203 and fixedly installed inside the base plate 102; the connecting pipe 205 is fixedly installed inside the connecting plate 103.

[0033] In this embodiment, each base plate 102 is fixedly installed with a centralized drain box 203 at its bottom. Each centralized drain box 203 has drainage slits at its top and bottom for guiding accumulated water. The main pipe 204 is fixed above the centralized drain box 203. The overlapping plate 103 is provided with an overlapping pipe 205. At the same time, each overlapping plate 103 has two guiding branch pipes 201 at its bottom. The top of the base plate 102 and the top of the overlapping plate 103 are provided with connecting holes for cooperating with the guiding branch pipes 201 of the upper overlapping plate 103. In addition, the top of the base plate 102 and the bottom of the overlapping plate 103 are also provided with overlapping holes for cooperating with the overlapping pipes 205. The connecting holes on both sides of the overlapping plate 103 at the top can be sealed with plugs under normal circumstances to prevent excessive impurities from entering the corresponding overlapping plate 103 through the connecting holes. Each of the base plates 102 and the overlapping plates 103 has a narrow slot plate 202 fixedly installed within the slot. The narrow slot plate 202 prevents excessive impurities from entering the base plates 102 and the overlapping plates 103. After the base plate 102 and the overlapping plate 103 are engaged, the overlapping hole on the top of the base plate 102 engages with the overlapping pipe 205 on the overlapping plate 103. Simultaneously, the connecting branch pipe 201 on the overlapping plate 103 engages with the connecting hole at the top of the base plate 102. The overlapping plate 103, which engages with the base plate 103, can also connect its own overlapping pipe 205 and the connecting branch pipe 205 in the above manner. The connecting branch pipe 201 cooperates with the lower overlapping plate 103, so that water inside each overlapping plate 103 can continuously flow into the bottom bottom plate 102 through the connecting branch pipe 201. Then, the external water pump connects to the overlapping pipe 205 of the uppermost overlapping plate 103, and then connects to the main pipe 204 of the bottom plate 102 through the overlapping pipe 205 of the lower overlapping plate 103, thereby drawing out the water accumulated inside the bottom plate 102. In this way, as long as the overlapping pipe 205 of all the top overlapping plates 103 is connected to the pumping end of the external water pump, the excess water seeping into the entire foundation pit and the soil on the side of the slope 1 can be drawn out and discharged.

[0034] Preferably, the protective assembly further includes a locking block 401, a locking groove plate 402, a locking component, and a manual control component. The locking component includes a stop block 403 and an extrusion spring 404. The manual control component includes a sliding cover 501, a side guide post 502, and a drive screw 503. The manual control component also includes a linkage bevel gear 504, a turning shaft 505, a drive bevel gear 506, and a turning cap 507.

[0035] Furthermore, the locking blocks 401 are fixedly installed on both sides of the top of the base plate 102 and the overlapping plate 103; the locking groove plate 402 is fixedly installed on both sides of the bottom of the overlapping plate 103; the locking component is connected to the locking groove plate 402 and is used to limit and lock the locking blocks 401 that cooperate with the locking groove plate 402; the hand control component is connected to the overlapping plate 103 and is used to assist the operator in quickly releasing the locking component.

[0036] Furthermore, the stop block 403 is slidably installed inside the locking groove plate 402; the two sides of the extrusion spring 404 are respectively connected to the stop block 403 and the locking groove plate 402.

[0037] In this embodiment, the locking block 401 is adapted to the locking groove track within the locking groove plate 402. The locking groove track within the locking groove plate 402 is "L"-shaped. When installing the base plate 102 and the overlapping plate 103, as well as the overlapping plates 103 with each other, the user can assemble them by the cooperation of the locking block 401 and the locking groove track inside the locking groove plate 402. Because the locking groove track is "L"-shaped, the user needs to ensure that the plate to be installed is at a certain height from the corresponding plate, and then assemble them by the locking groove track. The guide moves and presses down, thus ensuring smooth assembly between various outlet pipes and corresponding slots of the plates during installation. Each locking slot plate 402 is provided with a stop block 403 on its locking slot track. The locking slot plate 402 is provided with an extrusion spring 404 in the groove for cooperating with the stop block 403. When the locking block 401 and the locking slot plate 402 are engaged, the stop block 403 will pop out under the action of the extrusion spring 404, thereby limiting and blocking the locking plate and ensuring a stable connection between the two plates. The positions where the stop block 403 and the locking block 401 press against each other during installation are provided with corresponding arc-shaped platforms, so that the stop block 403 can quickly lock into the locking block 401 during installation, facilitating the user's rapid installation of the entire support structure.

[0038] Furthermore, the sliding cover 501 is slidably mounted on the locking groove plate 402; the side guide post 502 is fixedly mounted on the side of the stop block 403 near the sliding cover 501; the driving screw 503 is threadedly connected to the sliding cover 501 and is rotatably mounted in the locking groove plate 402.

[0039] Furthermore, the linkage bevel gear 504 is fixedly connected to the drive screw 503 and is located at the top of the drive screw 503; the turning shaft 505 is rotatably installed in the locking groove plate 402; the driving bevel gear 506 meshes with the linkage bevel gear 504 and is fixedly sleeved on the turning shaft 505; the turning cap 507 is fixedly installed on one side of the turning shaft 505.

[0040] In this embodiment, each of the locking slot plates 402 is slidably fitted with a sliding cover 501. The sliding cover 501 cooperates with the top guide groove of the locking slot plate 402 through an inner guide plate. The guide plate of the sliding cover 501 is provided with a threaded hole for cooperating with the driving screw 503. The top of the driving screw 503 is fixed with a linkage bevel gear 504. The linkage bevel gear 504 meshes with the driving bevel gear 506 on the turning shaft 505. The outer end of the turning shaft 505 is fixed with a turning cap 507 so that the user can turn the turning cap 507 to drive the turning shaft 505 to rotate, thereby driving the driving screw 503 to rotate through the corresponding bevel gear set, and finally driving the sliding cover 501. The inner side of the sliding cover 501 is provided with a corresponding guide side groove. The side guide post 502 fixed to the side of the stop block 403 cooperates with the guide side groove of the sliding cover 501. When the sliding cover 501 moves upward, the guide post can drive the stop block 403 to move by cooperating with the guide side groove of the sliding cover 501, so that the stop block 403 retracts into the locking groove plate 402. When the sliding cover 501 moves downward, the stop block 403 will pop out again under the action of the extrusion spring 404. This allows the user to control the state of the stop block 403 by controlling the up and down movement of the sliding cover 501. This makes it convenient for the user to quickly release the locking limit between the locking groove plate 402 and the locking block 401 when disassembling the entire connected plate. Meanwhile, since the locking groove track provided on the locking groove plate 402 has an opening, after the corresponding plates are fitted together, the opening of the locking groove track of the inclined groove plate can be blocked by the downward movement of the sliding cover 501, so as to avoid impurities or dirt clogging the locking groove track and preventing the locking block 401 from being quickly removed from the locking groove plate 402 during subsequent disassembly.

[0041] Please see Figure 9 A method for excavating a foundation pit in a water-rich stratum, using the aforementioned excavation device for a foundation pit in a water-rich stratum, includes the following steps: S1: Lay multiple base plates 102 at specified intervals at the bottom of slope 1; S2: By setting the reinforcing rib 101 to contact the abutting side plate 104 on the side of the bottom plate 102, the multiple bottom plates 102 are pressed tightly to the bottom of the slope 1; Specifically, both the base plate 102 and the overlapping plate 103 are hollow, and both have internal grooves for collecting water. Since both the base plate 102 and the overlapping plate 103 are hollow, in order to ensure the overall support stability of the base plate 102 and the overlapping plate 103, the support frame 301 and the reinforcing bracket 302 are fixedly installed inside both the base plate 102 and the overlapping plate 103. Both the support frame 301 and the reinforcing bracket 302 have triangular cross-sections to enhance the support strength of the base plate 102 and the overlapping plate 103. The front and rear sides of the support frame 301 and the reinforcing bracket 302 are respectively attached to the front and rear inner walls of the inner groove of the base plate 102 and the overlapping plate 103. The upper and lower sides of the support frame 301 and the reinforcing bracket 302 are respectively attached to the upper and lower inner walls of the inner groove of the base plate 102 and the overlapping plate 103. In order to ensure that the water collected at the bottom of the inner groove of the base plate 102 and the overlapping plate 103 can communicate with each other, the support frame 301 and the reinforcing bracket 302 are provided with corresponding narrow sides at the bottom without affecting the overall support strength. Multiple long seams are provided on the front and rear sides of the base plate 102 and the overlapping plate 103. Through the long seams, water seeping out of the soil in the slope 1 can enter the corresponding base plate 102 and the overlapping plate 103. The bottom of the base plate 102 is also provided with corresponding slots so that water accumulated inside the foundation pit can enter the interior of the base plate 102.

[0042] S3: Each pressed base plate 102 is provided with a lap plate, and then, in the same way as fixing the base plate 102, the lap plate 103 is pressed by setting the pressure rib 101 in conjunction with the abutting side plate 104 on the side of the lap plate 103. S4: After the overlapping plate 103 above the base plate 102 is pressed and fixed, multiple layers of overlapping plates 103 are installed and fixed on the overlapping plate 103 in sequence, referring to the installation method of the overlapping plate 103 above the base plate 102, until the top overlapping plate 103 completes the support for the top of the slope 1. Specifically, the locking block 401 is adapted to the locking groove track within the locking groove plate 402. The locking groove track within the locking groove plate 402 is "L"-shaped. When the user installs the base plate 102 and the overlapping plate 103, as well as the overlapping plates 103 with each other, assembly can be performed through the cooperation of the locking block 401 and the locking groove track within the locking groove plate 402. Since the locking groove track is "L"-shaped, the user needs to ensure that the plate being installed is at a certain height from the corresponding plate, and then guide it through the locking groove track. The movement and pressing ensure smooth assembly between various outlet pipes and corresponding slots of the plates during installation. Each locking slot plate 402 is equipped with a stop block 403 on its locking slot track. The locking slot plate 402 is equipped with an extrusion spring 404 in the groove for cooperating with the stop block 403. When the locking block 401 and the locking slot plate 402 are engaged, the stop block 403 will pop out under the action of the extrusion spring 404, thereby limiting and blocking the locking plate and ensuring a stable connection between the two plates. The positions where the stop block 403 and the locking block 401 press against each other during installation are provided with corresponding arc-shaped platforms, so that the stop block 403 can quickly lock into the locking block 401 during installation, facilitating the user's rapid installation of the entire support structure.

[0043] S5: After the base plate 102 and the overlapping plate 103 are installed, the base plate 102 and the overlapping plate 103 are connected by the connecting member. S6: An external water pump is used in conjunction with the connecting component to draw out and drain excess water that has seeped into the base plate 102 and the overlapping plate 103, as well as excess water at the bottom of the pit. Specifically, a centralized drain box 203 is fixedly installed at the bottom of each base plate 102. Each centralized drain box 203 has drainage slits at the top and bottom for guiding accumulated water. A main pipe 204 is fixed above the centralized drain box 203. An overlapping pipe 205 is provided inside the overlapping plate 103. At the same time, two guiding branch pipes 201 are provided at the bottom of each overlapping plate 103. The top of the base plate 102 and the top of the overlapping plate 103 are provided with connecting holes for cooperating with the guiding branch pipes 201 of the upper overlapping plate 103. In addition, the top of the base plate 102 and the bottom of the overlapping plate 103 are also provided with overlapping holes for the user to cooperate with the overlapping pipe 205. After the base plate 102 and the upper overlapping plate 103 are engaged, the overlapping hole on the upper part of the base plate 102 will engage with the overlapping pipe 205 provided on the overlapping plate 103. Simultaneously, the guiding branch pipe 201 provided on the overlapping plate 103 will engage with the communicating hole at the top of the base plate 102. The overlapping plate 103, which engages with the base plate 103 above, can also engage its own overlapping pipe 205 and guiding branch pipe 201 with the overlapping plate 103 below in the same manner. Thus, water inside each overlapping plate 103 can... The water continuously flows into the bottommost base plate 102 through the connecting branch pipe 201. Then, the external water pump connects to the connecting pipe 205 of the topmost overlapping plate 103, and then connects to the main pipe 204 of the base plate 102 through the connecting pipe 205 of the lower overlapping plate 103, thereby drawing out the water accumulated inside the base plate 102. In this way, by connecting all the connecting pipes 205 of the top overlapping plates 103 to the pumping end of the external water pump, the excess water seeping into the entire foundation pit and the soil on the side of the slope 1 can be drawn out and discharged.

[0044] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A foundation pit excavation device for water-rich strata, comprising reinforcing bars, characterized in that, It also includes protective components; The protective assembly includes a base plate, an overlapping plate, an abutting side plate, a connecting member, and a supporting member; Multiple base plates are disposed at the bottom of the slope, and each base plate is provided with an overlapping plate. Several overlapping plates are sequentially overlapped above the overlapping plates on the base plates. The back sides of the base plates and the overlapping plates abut against the slope surface. Abutting side plates are fixedly installed on the sides of the base plates and the overlapping plates. The abutting side plates abut against the reinforcing ribs. A connecting member is connected to the overlapping plates to realize the connection between the multiple base plates and the overlapping plates. A supporting member is connected to the base plates to enhance the overall support stability of the base plates and the overlapping plates.

2. The foundation pit excavation device for water-rich strata as described in claim 1, characterized in that, The connecting component includes a guide branch pipe, a slotted plate, and a suction component. The guide branch pipe is fixedly installed at the bottom of the overlapping plate. Multiple slotted plates are fixedly installed on both the front and rear sides of the base plate and the overlapping plate. The suction component is connected to the base plate and is used to guide the water accumulated inside the base plate.

3. The foundation pit excavation device for water-rich strata as described in claim 1, characterized in that, The supporting component includes a support frame and a reinforcing bracket. The support frame is fixedly installed inside the base plate, and the reinforcing bracket is fixedly installed inside the overlapping plate.

4. The foundation pit excavation device for water-rich strata as described in claim 2, characterized in that, The suction component includes a central drain box, a main pipe, and a connecting pipe. The central drain box is fixedly installed at the bottom of the base plate. The main pipe is connected to the central drain box and is fixedly installed inside the base plate. The connecting pipe is fixedly installed inside the connecting plate.

5. The foundation pit excavation device for water-rich strata as described in claim 1, characterized in that, The protective assembly further includes a locking block, a locking groove plate, a locking component, and a manual control component. The locking blocks are fixedly installed on both sides of the top of the base plate and the overlapping plate; the locking groove plates are fixedly installed on both sides of the bottom of the overlapping plate; the locking component is connected to the locking groove plate and is used to limit and lock the locking blocks that cooperate with the locking groove plate; the manual control component is connected to the overlapping plate and is used to assist the operator in quickly releasing the locking component.

6. The excavation device for water-rich strata foundation pits as described in claim 5, characterized in that, The locking component includes a stop block and an extrusion spring. The stop block is slidably installed inside the locking groove plate. The two sides of the extrusion spring are respectively connected to the stop block and the locking groove plate.

7. The foundation pit excavation device for water-rich strata as described in claim 6, characterized in that, The manual control component includes a sliding cover, a side guide post, and a drive screw. The sliding cover is slidably mounted on the locking groove plate. The side guide post is fixedly mounted on the side of the stop block near the sliding cover. The drive screw is threadedly connected to the sliding cover and rotatably mounted in the locking groove plate.

8. The foundation pit excavation device for water-rich strata as described in claim 7, characterized in that, The manual control component also includes a linkage bevel gear, a turning shaft, a drive bevel gear, and a turning cap. The linkage bevel gear is fixedly connected to the drive screw and is located at the top of the drive screw. The turning shaft is rotatably installed in the locking groove plate. The drive bevel gear meshes with the linkage bevel gear and is fixedly sleeved on the turning shaft. The turning cap is fixedly installed on one side of the turning shaft.

9. A method for excavating a foundation pit in water-rich strata, using the foundation pit excavation device for water-rich strata as described in claim 1, characterized in that, Includes the following steps, Multiple base plates are laid at specified intervals at the bottom of the slope; By setting ribs to contact the abutting side plates on the side of the base plate, multiple base plates are pressed tightly against the bottom of the slope; Each of the pressed base plates is provided with a lap plate, and then, in the same way as fixing the base plate, the lap plate is pressed by setting the pressure rib in conjunction with the abutting side plate on the side of the lap plate; After the overlapping plate above the base plate is pressed and fixed, multiple layers of overlapping plates are installed and fixed on top of the overlapping plate in sequence, referring to the installation method of the overlapping plate above the base plate, until the top overlapping plate completes the support for the top of the slope. After the base plate and the overlapping plate are installed, the base plate and the overlapping plate are connected by the connecting components. An external water pump is used in conjunction with the connecting component to draw out and drain excess water that has seeped into the base plate and the overlapping plate, as well as excess water that has accumulated at the bottom of the pit.

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