Fabricated foundation pit supporting structure and supporting method thereof

Abstract

The invention discloses an assembly type foundation pit supporting structure and a supporting method thereof.The supporting structure is distributed in the transverse direction and the longitudinal direction of the inner side of a rectangular foundation pit in a surrounding mode and comprises a first supporting component and a second supporting component; the first supporting component comprises a plurality of main components distributed in a rectangular shape and corner connecting components used for connecting the transverse edge corners and the longitudinal edge corners of the main components. The second supporting component is arranged in the depth direction of the foundation pit and comprises a second supporting plate, a T-shaped frame, a sliding plate, a sliding frame A, a sliding frame B, a handle, a rotating rod, a worm, an arc-shaped worm gear, a swing rod and an adjusting ejector rod, the T-shaped frame is installed on the top side of the first supporting plate in a sliding mode, and adjusting grooves are formed in the two sides of the T-shaped frame. The method has the remarkable advantages in the aspects of construction speed, installation convenience, flexible adjustability and structural stability, the construction cost can be greatly reduced, and the construction safety can be improved.

Description

Technical Field

[0001] The invention relates to the field of foundation pit support, and in particular to an assembled foundation pit support structure and a support method thereof. Background Art

[0002] With the advancement of urbanization, foundation pit engineering, as an important part of building construction, faces increasingly complex construction environments and strict safety requirements. In many urban construction projects, especially in deep foundation pits, high groundwater levels and complex geological conditions, traditional foundation pit support technology can no longer meet the growing engineering needs. Traditional foundation pit support structures usually use steel sheet piles, concrete supports and other methods. Although they can provide support to a certain extent, they have long construction periods, high material consumption, cumbersome installation processes and are difficult to adapt to the needs of foundation pits of different sizes, resulting in high construction costs and time waste.

[0003] In addition, the installation and disassembly of traditional support structures are difficult and often require a large amount of manpower and heavy machinery and equipment, which poses a high safety risk during the construction process. Especially when the foundation pit is deep or has a special shape, it is very difficult to adjust and change the traditional support structure, and it is unable to flexibly respond to the challenges brought about by changes in foundation pit size and construction progress. These problems have forced the engineering community to urgently seek a more efficient, safe and flexible foundation pit support solution.

[0004] In order to solve these problems, in recent years, prefabricated foundation pit support structures have gradually become a new technical trend. Prefabricated support structures can significantly improve construction efficiency, shorten construction periods, and adapt to different foundation pit sizes and complex geological conditions by prefabricating components in factories and quickly assembling them on site. The advantages of this prefabricated structure are its modularity, standardization, and adjustability. It can be customized according to specific foundation pit requirements and has higher flexibility.

[0005] However, the existing prefabricated foundation pit support structure still faces some technical bottlenecks, such as:

[0006] Low installation and disassembly efficiency: Most support structures rely on on-site welding or complex connection methods, which takes a long time to install and is also time-consuming and labor-intensive to disassemble, and has a low reuse rate;

[0007] Insufficient support strength and stability: The existing support structure is often unable to flexibly adjust when facing different foundation pit conditions, resulting in insufficient support strength and stability in some foundation pit construction, which is prone to structural deformation or collapse;

[0008] Inconvenient adjustment: The height and support position of the existing support structure often cannot be flexibly adjusted according to changes in the depth and shape of the foundation pit. Under some special foundation pit conditions, this may result in the support structure being unable to fully exert its due supporting force.

[0009] In order to solve the above problems, the prior art discloses the following solutions:

[0010] 1) Publication No. CN117868148A discloses a foundation pit support structure, which includes: multiple supporting columns, multiple cross beams, steel sheet piles, multiple rigid composite anchors and multiple steel tie rods; the multiple supporting columns are spaced along the edge of the foundation pit and vertically arranged in the soil at the edge of the foundation pit; multiple cross beams are sequentially connected between the multiple supporting columns along the direction of the foundation pit edge to form a row of cross beams; at least two rows of cross beams are spaced at preset distances along the depth direction of the foundation pit; the steel sheet piles are vertically arranged in the soil at the edge of the foundation pit, and their front surfaces are close to the supporting columns and cross beams; the multiple rigid composite anchors are arranged in the soil outside the foundation pit, and each rigid composite anchor is correspondingly located at a preset distance directly behind each supporting column, and each supporting column is connected to each rigid composite anchor by a steel tie rod. The application of the present invention can solve the problem that the foundation pit support structure is complex in form and has many procedures for replacing and removing supports.

[0011] 2) Publication No. CN117822607A discloses a deep foundation pit support structure for building construction. In this technical application, it includes a support baffle and also includes: an angle adjustment part, the angle adjustment part is fixedly mounted on the support baffle, and a diagonal support rod is rotatably mounted on the angle adjustment part, a height support rod is fixedly mounted on the diagonal support rod, and a rotating connecting rod is rotatably mounted on the height support rod; and a support monitoring mechanism, the support monitoring mechanism is respectively connected to the support baffle and the angle adjustment part, and is connected to the rotating connecting rod, wherein the support monitoring mechanism includes a support assembly, a water level detection assembly and a reinforcement control assembly; the deep foundation pit support structure for building construction of the present invention can promptly remind the staff to carry out maintenance when the underground water level of the foundation pit is high and the support baffle is tilted or loose, so as to avoid affecting the stability of the support structure due to the liquefaction and increased fluidity of the soil.

[0012] 3) Publication No. CN117188488A discloses a foundation pit support device and a foundation pit support method. In this technical application, it includes a support plate, and both ends of the side of the support plate are provided with a first support component and a second support component; the first support component includes: a strip plug, the strip plug is horizontally arranged on the side of the support plate, and the other side of the support plate abuts against the limit plate, the end of the strip plug passes through the support plate and is fixedly installed at the center of the side of the limit plate, and a vertebral body is fixedly installed on the top of the strip plug, and a reinforcement component for reinforcing the stability of the strip plug is provided inside the strip plug. The present invention can make the limit pin move and rotate synchronously, so that the limit pin can enter the soil more smoothly after extending out of the strip plug and extending out of the strip plug, so as to achieve stable limiting of the strip plug, and further ensure the support safety of the support plate.

[0013] Among the above-mentioned prior art 1, the technology involves a combination of complex structures such as multiple support column piles, crossbeam sections, and steel sheet piles. The construction process is rather cumbersome, requiring multiple times of bracing replacement and removal, and it is rather troublesome to use. In prior art 3, strip-shaped inserts and limit plates are used for structural connection. Although it can provide a certain degree of stability, the overall structure is relatively simple and cannot flexibly adjust the height or shape of the support plate, thus unable to meet the diverse requirements of deep foundation pits and complex geological environments. In prior art 2, the structure has a high degree of complexity and a single shape. Summary of the Invention

[0014] The purpose of the present invention is to provide a prefabricated foundation pit support structure and its support method, which not only have significant advantages in terms of construction speed, installation convenience, flexible adjustability, and structural stability, but also can greatly reduce the construction cost and improve construction safety. Through modular design and enhanced connection methods, the structure has strong adaptability and adjustability in practical applications.

[0015] To achieve the above purpose, the present invention provides the following technical solution: A prefabricated foundation pit support structure, the support structure is distributed around the inner side of a rectangular foundation pit in the horizontal and vertical directions. The support structure includes a first support member and a second support member, wherein:

[0016] The first support member includes a plurality of main members distributed in a rectangle and corner connection members for connecting the horizontal and vertical side corners of the plurality of main members. The main member includes a bottom plate, a limit insertion plate, a first support plate, a side support member A, a side support member B, and a reinforcement plate. The reinforcement plate is connected to the rear side of the bottom plate, and the limit insertion plate is installed on one side of the top of the bottom plate; the cross-section of the limit insertion plate is in an inverted "tu" shape, slots are provided on both sides of the limit insertion plate, and the side support member A is arranged at the rear end of the limit insertion plate; the first support plate is inserted into the inner side of the slot of the limit insertion plate, and the second support member is installed on the first support plate.

[0017] The second support member is arranged along the depth direction of the foundation pit. The second support member includes a second support plate, a T-shaped frame, a sliding plate, a sliding frame A, a sliding frame B, a handle, a rotating rod, a worm, an arc-shaped worm gear, a swinging rod, and an adjusting jack. The T-shaped frame is slidably mounted on the top side of the first support plate, and adjusting grooves are provided on both sides of the T-shaped frame.

[0018] Preferably, the side support member A is a side support rod with its front end hinged to the upper side of the limit insertion plate and a long through hole provided at the rear end. The side support member B is movably installed inside the long through hole, and the shaft end of the side support member B is hinged to the middle of the back side of the limit insertion plate.

[0019] Preferably, the reinforcement plate has an L-shaped cross-section and is inserted into the rear side of the bottom plate. Connection holes are provided at intervals on the reinforcement plate. A front panel is arranged on the front side of the reinforcement plates of multiple main members. The front panel is connected to the connection holes on the reinforcement plate by bolts, and U-shaped grooves are provided at both ends of the front panel.

[0020] Preferably, the corner connecting member includes a connecting plate, studs and clamps, wherein the connecting plate is an L-shaped plate, the connecting plate is adapted to the slot on the limiting plug plate, the two ends of the connecting plate extend into the inner side of the slot respectively, and the front end of the connecting plate is integrally formed with a pad of the same height as the bottom plate.

[0021] Preferably, a stud is provided on the pad, and a clamp is connected to the stud through a nut limiter. The clamp connects two reinforcement plates arranged at the corners through bolts and nuts. Both ends of the front panel extend into the inner side of the clamp and are locked by bolts and nuts.

[0022] Preferably, the above-mentioned first supporting member is formed by splicing multiple main members and corner connecting members. In actual application, multiple main members and corner connecting members are selected. First, according to the size of the rectangular foundation pit, the multiple main members are distributed in a rectangular shape on the inner side of the foundation pit, and then the horizontal and vertical corners of the main members are connected by using the corner connecting members. The corner connecting members have two purposes. One is to connect the reinforcement plate on the front side of the main member with a clamp, and the other is to lock the front panel on the front side of the multiple reinforcement plates. The stability of the multiple main members when spliced ​​is further ensured by the corner connecting members, and the strength is high and the support stability is better. In addition, the first supporting member adopts an assembled structure as a whole, which can adapt to foundation pits of different lengths and widths.

[0023] Preferably, the upper and lower ends of both sides of the T-shaped frame are vertically connected to the slide plate, and the upper and lower slide plates are connected by a support plate and a side baffle plate.

[0024] Preferably, the rotating rod is rotatably mounted on the inner sides of the two slide plates, one side of the rotating rod shaft end is connected to the handle, and a worm is provided on the rotating rod.

[0025] Preferably, the front end of the slide A is slidably connected to the skateboard, the rear end of the slide A is connected to the second supporting plate, and the slide A is provided with a long sliding hole that cooperates with the handle.

[0026] Preferably, the arc-shaped worm wheel is rotatably mounted on the support plate and corresponds to the position of the worm, and the rack on the outer side of the arc-shaped worm wheel is meshed with the worm.

[0027] Preferably, the slide B is L-shaped and fixed on the support plate, pulleys are provided at the upper and lower ends of the inner side of the slide B, the middle of the swing rod is connected to the eccentric side of the arc worm gear through a pin shaft, and the upper and lower ends of the swing rod extend into the inner sides of the upper and lower ends of the slide B respectively and are connected to the pulleys.

[0028] Preferably, the adjusting top rod is coaxially connected to the upper end of the swing rod, and the upper end of the adjusting top rod is connected to the second supporting plate.

[0029] Preferably, the second support member can be detachably installed on the first support member as needed (detachable connection and installation methods such as sliding / snap-on installation), the second support member is used to increase the height of the first support member so that the entire support structure can meet the requirements of different foundation pit depths, the second support member has a smaller volume as a whole, and can be expanded / stretched in length as needed after installation, the second support member is driven to expand / stretch by a handle, specifically, the handle is bravely turned to make the handle drive the rotating rod to rotate, the rotating rod uses the worm thereon to engage the arc-shaped worm gear to rotate the arc-shaped worm gear, and the arc-shaped worm gear will drive the swing rod to swing, and the swing rod drives the adjusting top rod to push upward, and cooperates with the sliding cooperation of the slide A and the slide plate to realize the movement of the second support plate, and the second support plate will extend out of the adjustment slot to further realize outward expansion, the second support plate can support the upper side of the foundation pit, and at the same time, it is small in volume, and can be customized with different heights and different models in actual application to meet the support requirements of foundation pits of different depths.

[0030] The use of foundation pit support structure in practical applications includes the following:

[0031] Step 1: Preparation for installation of support structure;

[0032] Step 1.1: Determine the required components according to the size of the foundation pit. First, measure the actual size of the foundation pit. According to the size of the rectangular foundation pit, select the corresponding number of main components and corner connection components to ensure that the size of each component matches the size of the foundation pit;

[0033] Step 1.2: Prepare the necessary tools and equipment;

[0034] Step 2: Installation of the first support member;

[0035] Layout the main components, distribute multiple main components in a rectangular shape around the foundation pit according to the length and width of the foundation pit, with the bottom plate of each main component facing inwards;

[0036] Connect the main components through the limit plug-in plate and the slot. The limit plug-in plate on the top of each main component will be inserted into the corresponding slot, and the reinforcement plate and the front panel will be locked by bolts. The reinforcement plate and the bottom plate are plugged in. The two ends of the front panel are connected to the reinforcement plate through U-shaped grooves and locked by bolts and nuts;

[0037] Splicing corner connection components: Use L-shaped connection plates and studs to connect the horizontal and vertical corners of the main components. The corner connection components not only connect the reinforcement plate but also lock the front panel when connected;

[0038] Step 3: Installation and adjustment of the second support member;

[0039] Step 3.1: During installation, the second supporting member is installed on the top side of the first supporting plate by sliding;

[0040] Step 3.2: Adjust the height of the second support plate: Turn the handle to drive the rotating rod to rotate, and the arc worm gear is driven by the worm to rotate. The arc worm gear drives the swing rod to swing, and the swing rod then lifts the second support plate by adjusting the top rod, so that the support plate expands outward. At this time, the supporting effect of the second support plate is enhanced to meet the support requirements of foundation pits of different shapes;

[0041] Step 4: Debugging and stability check of support structure:

[0042] Step 4.1: Check the stability of the structure: After all components are installed, check the stability of the overall structure to ensure that all connecting parts (such as bolts, nuts, connecting plates, etc.) are firm and not loose, and that the position of the support plate above the foundation pit is stable and the supporting force is evenly distributed;

[0043] Step 4.2: Perform a load test: If conditions permit, a load test can be performed to check whether the support structure is stable under the simulated pit load to ensure that the structure can withstand the expected load during actual use.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The present invention not only has significant advantages in construction speed, installation convenience, flexible adjustability and structural stability, but can also significantly reduce construction costs and improve construction safety. Through modular design and enhanced connection methods, the structure has strong adaptability and adjustability in practical applications.

[0046] The specific technical effects include:

[0047] 1) Assembled design to meet the needs of quick installation and disassembly:

[0048] The support structure of the present invention adopts an assembled design, and all components are prefabricated in the factory. On site, they only need to be assembled according to the size of the rectangular foundation pit. By connecting the main components and the corner connecting components, the construction of the foundation pit support structure can be completed quickly, saving a lot of construction time.

[0049] Moreover, due to the use of a detachable assembly connection method, when the construction is completed, the support structure can be easily dismantled and reused, reducing resource waste and improving equipment utilization.

[0050] 2) Adapt to different depths of foundation pits:

[0051] By adding a second supporting component, the support needs for foundation pits of different depths can be met. The second supporting component also adopts a portable structure, which is convenient for loading and unloading. In addition, the second supporting component is small in size, which is convenient for extension or contraction as needed after installation, and has strong flexibility and adaptability.

[0052] 3) Enhanced stability and security:

[0053] The corner connection components use L-shaped connection plates and studs to lock the horizontal and vertical corners of the main components. The double locking of the connection plates and clamps greatly improves the stability of the entire structure. In addition, the corner connection components can not only strengthen the splicing of the main components, but also effectively fix the reinforcement plates and front panels to ensure the overall stability of the support structure during the construction process.

[0054] The locking design of the reinforcement plate and the front panel further enhances the support strength, allowing the support structure to withstand greater loads, ensuring sufficient support during foundation pit excavation and reducing the risk of foundation pit collapse.

[0055] 4) Flexible adjustment and precise control:

[0056] Through the cooperation between the worm and the arc-shaped worm gear, the worm gear is used to drive the swing rod to accurately adjust the position of the second support plate. Through this adjustment structure, the outward expansion range of the support plate can be accurately controlled, so that the support structure can be adjusted in time according to the changes in the foundation pit shape during the construction process to ensure the continuous safety of the foundation pit construction;

[0057] The design of the adjustment groove enables the support plate to be extended and retracted when needed to meet the support requirements of different foundation pit depths, widths and complex terrains.

[0058] 5) Modular design to adapt to different foundation pit shapes:

[0059] Due to the modular structure, the foundation pit support structure can flexibly select the required component combination according to the size and shape of the different foundation pits. The various parts of the structure (such as main components, reinforcement plates, front panels, etc.) can be deployed as needed to achieve comprehensive coverage of the foundation pit.

[0060] 6) Optimized support structure design to reduce construction costs:

[0061] The optimized design of the reinforcement plate and the front panel effectively enhances the stability of the overall structure and avoids over-reliance on traditional support materials. The prefabrication and standardized design of the support components not only improves construction efficiency, but also greatly reduces the waste of on-site materials, thereby effectively controlling construction costs; at the same time, since the structural components can be reused, the long-term use cost of the support system has also been effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 It is a schematic diagram of the overall structure of the supporting structure of the present invention;

[0063] Figure 2 It is a schematic diagram of the construction of multiple supporting structures surrounding a foundation pit according to the present invention;

[0064] Figure 3 is a schematic structural diagram of a first supporting member in an embodiment of the present invention;

[0065] Figure 4 for Figure 2 A partial enlarged schematic diagram of the structure in FIG.

[0066] Figure 5 It is a schematic structural diagram of a corner connection component in an embodiment of the present invention;

[0067] Figure 6 The structure of the second supporting member in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0068] Figure 7 The structure of the second supporting member in the embodiment of the present invention is shown in FIG. Figure 2 .

[0069] In the figure:

[0070] 1. First supporting member; 101. Bottom plate; 102. Position limiting plug plate; 103. Front panel; 104. First supporting plate; 105. Side supporting member A; 106. Side supporting member B; 107. Reinforcement plate;

[0071] 2. Corner connecting member; 201. Connecting plate; 202. Stud; 203. Clamp;

[0072] 3. Second supporting member; 301. Second supporting plate; 302. T-shaped frame; 303. Slide plate; 304. Slide A; 305. Slide B; 306. Handle; 307. Turn bar; 308. Worm; 309. Arc worm gear; 310. Swing rod; 311. Adjusting top rod. DETAILED DESCRIPTION

[0073] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0074] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 cannot be understood as a limitation on the present invention.

[0075] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "set", "install", "connect", and "link" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0076] Please refer to Figure 1-Figure 2 , the present invention provides a technical solution: an assembled foundation pit support structure, the support structure is distributed around the inner side of the rectangular foundation pit in the horizontal and vertical directions, and the support structure includes a first support member 1 and a second support member 3.

[0077] Please refer to Figure 1-Figure 4 , in this embodiment, the first support member 1 includes a plurality of main members distributed in a rectangle and corner connection members 2 for connecting the horizontal and vertical side corners of the plurality of main members. The main members include a bottom plate 101, a limit insertion plate 102, a first support plate 104, a side support member A 105, a side support member B 106, and a reinforcement plate 107. The reinforcement plate 107 is connected to the rear side of the bottom plate 101, and the limit insertion plate 102 is installed on one side of the top of the bottom plate 101; the cross-section of the limit insertion plate 102 is in the shape of an inverted Chinese character "tu", and slots are provided on both sides of the limit insertion plate 102, and the side support member A 105 is arranged at the rear end of the limit insertion plate 102; the side support member A 105 is a side support rod with its front end hinged to the upper side of the limit insertion plate 102 and a long opening provided at the rear end, the side support member B 106 is movably installed inside the long opening, and the shaft end of the side support member B 106 is hinged to the middle of the back side of the limit insertion plate 102; the cross-section of the reinforcement plate 107 is in the shape of an L and is inserted into the rear side of the bottom plate 101, connection holes are provided at intervals on the reinforcement plate 107, a front panel 103 is arranged on the front side of the reinforcement plates 107 of the plurality of main members, the front panel 103 is connected to the connection holes on the reinforcement plate 107 by bolts, and U-shaped grooves are provided at both ends of the front panel 103.

[0078] Please refer to Figure 2 , Figure 4 , Figure 5 , the corner connection member 2 includes a connecting plate 201, a stud 202, and a clip 203. The connecting plate 201 is an L-shaped plate member, the connecting plate 201 is adapted to the slots on the limit insertion plate 102, and both ends of the connecting plate 201 extend into the inside of the slots respectively. A cushion plate with the same height as the bottom plate 101 is integrally formed at the front end of the connecting plate 201; a stud 202 is provided on the cushion plate, and a clip 203 is connected to the stud 202 by a nut for limit. The clip 203 connects the two reinforcement plates 107 arranged at the corner by bolts and nuts, and both ends of the front panel 103 extend into the inside of the clip 203 and are locked by bolts and nuts.

[0079] See also Figure 1 , Figure 6 , Figure 7 In this embodiment, the first supporting plate 104 is inserted into the inner side of the slot of the limiting plug plate 102, and the second supporting member 3 is installed on the first supporting plate 104. The second supporting member 3 is arranged along the depth direction of the foundation pit. The second supporting member 3 includes a second supporting plate 301, a T-shaped frame 302, a slide plate 303, a slide A 304, a slide B 305, a handle 306, a rotating rod 307, a worm 308, an arc worm gear 309, a swing rod 310 and an adjusting top rod 311, wherein the T-shaped frame 302 is slidably mounted on the top side of the first supporting plate 104, and adjustment grooves are provided on both sides of the T-shaped frame 302; the upper and lower ends of both sides of the T-shaped frame 302 are vertically connected to the slide plate 303, and the upper and lower slide plates 303 are connected by a support plate and a side baffle (not shown in the figure); the rotating rod 307 is rotatably installed on the inner side of the two slide plates 303, and one side of the shaft end of the rotating rod 307 is connected The handle 306 is connected, and a worm 308 is provided on the rotating rod 307; the front end of the slide A304 is slidably connected to the slide plate 303, and the rear end of the slide A304 is connected to the second support plate 301. The slide A304 is provided with a long sliding hole that cooperates with the handle 306; the arc worm wheel 309 is rotatably installed on the support plate and corresponds to the position of the worm 308, and the rack on the outside of the arc worm wheel 309 is meshed with the worm 308; the slide B305 is L-shaped and fixed on the support plate, and pulleys are provided at the upper and lower ends of the inner side of the slide B305, and the eccentric side of the arc worm wheel 309 is connected to the eccentric side of the arc worm wheel 309 through a pin in the middle of the swing rod 310, and the upper and lower ends of the swing rod 310 extend into the inner sides of the upper and lower ends of the slide B305 respectively and are connected to the pulleys; the adjusting top rod 311 is coaxially connected to the upper end of the swing rod 310, and the upper end of the adjusting top rod 311 is connected to the second support plate 301.

[0080] The use of foundation pit support structure in practical applications includes the following:

[0081] Step 1: Preparation for installation of support structure;

[0082] Step 1.1: Determine the required components according to the size of the foundation pit. First, measure the actual size of the foundation pit. According to the size of the rectangular foundation pit, select the corresponding number of main components and corner connection components 2 to ensure that the size of each component matches the size of the foundation pit;

[0083] Step 1.2: Prepare the necessary tools and equipment;

[0084] Step 2: Installation of the first supporting member 1;

[0085] Step 2.1: Layout the main components, distribute the multiple main components in a rectangular shape around the foundation pit according to the length and width of the foundation pit, with the bottom plate 101 of each main component facing inwards;

[0086] Step 2.2: Connect the main components. Connect the main components through the limit plug plate 102 and the slot. The limit plug plate 102 on the top of each main component will be inserted into the corresponding slot, and the reinforcement plate 107 and the front panel 103 will be locked by bolts. The reinforcement plate 107 is plugged into the bottom plate 101, and the two ends of the front panel 103 are connected to the reinforcement plate 107 through the U-shaped groove and locked by bolts and nuts;

[0087] Step 2.3: Splicing corner connection components 2: Use L-shaped connection plates 201 and studs 202 to connect the horizontal and vertical corners of the main components. When connecting, the corner connection components not only connect the reinforcement plate 107, but also lock the front panel 103;

[0088] Step 3: Installation and adjustment of the second supporting member 3;

[0089] Step 3.1: During installation, the second supporting member 3 is installed on the top side of the first supporting plate 104 by sliding;

[0090] Step 3.2: Adjust the height of the second supporting plate 301: Turn the handle 306 to drive the rotating rod 307 to rotate, and drive the arc worm gear 309 to rotate through the worm 308. The arc worm gear 309 drives the swing rod 310 to swing, and the swing rod 310 then lifts the second supporting plate 301 by adjusting the top rod 311, so that the supporting plate expands outward. At this time, the supporting effect of the second supporting plate 301 is enhanced to meet the support requirements of foundation pits of different shapes;

[0091] Step 4: Debugging and stability inspection of support structure;

[0092] Step 4.1: Check the stability of the structure: After all components are installed, check the stability of the overall structure to ensure that all connecting parts (such as bolts, nuts, connecting plates 201, etc.) are firm and not loose, and that the position of the support plate above the foundation pit is stable and the supporting force is evenly distributed;

[0093] Step 4.2: Perform a load test: If conditions permit, a load test can be performed to check whether the support structure is stable under the simulated pit load to ensure that the structure can withstand the expected load during actual use.

[0094] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembled foundation pit support structure, characterized in that: The support structure is distributed around the inner side of the rectangular foundation pit in the horizontal and vertical directions, and comprises a first support component (1) and a second support component (3), wherein: The first supporting member (1) comprises a plurality of main members distributed in a rectangular shape and a corner connecting member (2) for connecting the transverse and longitudinal corners of the plurality of main members, the main members comprising a bottom plate (101), a limiting plug plate (102), a first supporting plate (104), a side support member A (105), a side support member B (106) and a reinforcing plate (107), the rear side of the bottom plate (101) being connected to the reinforcing plate (107), and the limiting plug plate (102) being installed on one side of the top of the bottom plate (101); the limiting plug plate (102) has an inverted earth-shaped cross section, slots are provided on both sides of the limiting plug plate (102), and the side support member A (105) is provided at the rear end of the limiting plug plate (102); the first supporting plate (104) is inserted into the inner side of the slot of the limiting plug plate (102), and the second supporting member (3) is installed on the first supporting plate (104); The second supporting member (3) is arranged along the depth direction of the foundation pit. The second supporting member (3) comprises a second supporting plate (301), a T-shaped frame (302), a slide plate (303), a slide frame A (304), a slide frame B (305), a handle (306), a rotating rod (307), a worm (308), an arc-shaped worm wheel (309), a swing rod (310) and an adjusting top rod (311), wherein the T-shaped frame (302) is slidably mounted on the top side of the first supporting plate (104), and adjustment grooves are provided on both sides of the T-shaped frame (302); the upper and lower ends of both sides of the T-shaped frame (302) are vertically connected to the slide plate (303), and the upper and lower slide plates (303) are connected by a supporting plate and a side baffle.

2. The assembled foundation pit support structure according to claim 1, characterized in that: The side support member A (105) is a side support rod with a front end hinged to the upper side of the limiting plug plate (102) and a rear end provided with a long opening. The side support member B (106) is movably installed inside the long opening. The axial end of the side support member B (106) is hinged to the middle of the back side of the limiting plug plate (102).

3. The assembled foundation pit support structure according to claim 1, characterized in that: The reinforcing plate (107) has an L-shaped cross section and is plugged into the rear side of the bottom plate (101). The reinforcing plate (107) is provided with connection holes at intervals. A front panel (103) is provided on the front side of the reinforcing plates (107) on the plurality of main components. The front panel (103) is connected to the connection holes on the reinforcing plate (107) by bolts. U-shaped grooves are provided at both ends of the front panel (103).

4. The assembled foundation pit support structure according to claim 1, characterized in that: The corner connection component (2) comprises a connection plate (201), a stud (202) and a clamp (203), wherein the connection plate (201) is an L-shaped plate, the connection plate (201) is adapted to a slot on the limit plug plate (102), the two ends of the connection plate (201) respectively extend into the inner side of the slot, and a pad having the same height as the bottom plate (101) is integrally formed at the front end of the connection plate (201).

5. The assembled foundation pit support structure according to claim 4, characterized in that: The pad is provided with a stud (202), and a clamp (203) is connected to the stud (202) through a nut limiter. The clamp (203) connects two reinforcement plates (107) arranged at an angle through bolts and nuts. The two ends of the front panel (103) extend into the inner side of the clamp (203) and are locked through bolts and nuts.

6. The assembled foundation pit support structure according to claim 1, characterized in that: The rotating rod (307) is rotatably mounted on the inner sides of the two slide plates (303); one side of the shaft end of the rotating rod (307) is connected to the handle (306); and a worm (308) is provided on the rotating rod (307); the front end of the slide A (304) is slidably connected to the slide plate (303); the rear end of the slide A (304) is connected to the second supporting plate (301); and a long sliding hole matching the handle (306) is provided on the slide A (304).

7. The assembled foundation pit support structure according to claim 1, characterized in that: The arc-shaped worm wheel (309) is rotatably mounted on the support plate and corresponds to the position of the worm (308), and the rack on the outer side of the arc-shaped worm wheel (309) is meshed with the worm (308); the slide B (305) is L-shaped and fixed on the support plate, and pulleys are provided at the upper and lower ends of the inner side of the slide B (305); the middle of the swing rod (310) is connected to the eccentric side of the arc-shaped worm wheel (309) through a pin shaft, and the upper and lower ends of the swing rod (310) extend into the inner sides of the upper and lower ends of the slide B (305) respectively and are connected to the pulleys.

8. The assembled foundation pit support structure according to claim 1, characterized in that: The adjusting top rod (311) is coaxially connected to the upper end of the swing rod (310), and the upper end of the adjusting top rod (311) is connected to the second supporting plate (301).

9. A supporting method for an assembled foundation pit supporting structure according to any one of claims 1 to 8, characterized in that: Includes steps: Step 1: Preparation for installation of support structure; Step 1.1: Determine the required components according to the size of the foundation pit. First, measure the actual size of the foundation pit. According to the size of the rectangular foundation pit, select the corresponding number of main components and corner connection components (2) to ensure that the size of each component matches the size of the foundation pit. Step 1.2: Prepare the necessary tools and equipment; Step 2: Installation of the first supporting member (1); Step 2.1: Layout the main components, distribute the main components in a rectangular shape around the foundation pit according to the length and width of the foundation pit, with the bottom plate (101) of each main component facing inwards; Step 2.2: Connect the main components. Connect the main components through the limiting plug plate (102) and the slot. The limiting plug plate (102) on the top of each main component will be inserted into the corresponding slot, and the reinforcing plate (107) and the front panel (103) will be locked by bolts. The reinforcing plate (107) and the bottom plate (101) are plugged together. The two ends of the front panel (103) are connected to the reinforcing plate (107) through U-shaped grooves and locked by bolts and nuts. Step 2.3: Splicing corner connection components (2): Use L-shaped connection plates (201) and studs (202) to connect the horizontal and vertical corners of the main component. When connecting, the corner connection components not only connect the reinforcement plate (107) but also lock the front panel (103); Step 3: Installation and adjustment of the second supporting member (3); Step 3.1: During installation, the second supporting member (3) is installed on the top side of the first supporting plate (104) by sliding; Step 3.2: Adjust the height of the second supporting plate (301): Turn the handle (306) to drive the rotating rod (307) to rotate, and drive the arc worm wheel (309) to rotate through the worm (308), and the arc worm wheel (309) drives the swing rod (310) to swing, and the swing rod (310) then lifts the second supporting plate (301) by adjusting the push rod (311), so that the second supporting plate (301) expands outward; Step 4: Debugging and stability inspection of support structure; Step 4.1: Check the stability of the structure: After all components are installed, check the stability of the overall structure to ensure that all connecting parts are firm and not loose, and that the support plate is stable above the foundation pit and the support force is evenly distributed; Step 4.2: Carry out load test: Carry out load test when conditions permit to check whether the support structure is stable under the simulated foundation pit load and ensure that the structure can withstand the expected load during actual use.

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