Foundation pit supporting device and mounting method

Abstract

The invention discloses a foundation pit supporting device and an installation method, and belongs to the technical field of foundation pit construction, in the foundation pit supporting device, a side wall body comprises a plurality of external connecting plates, a supporting mechanism is arranged between every two adjacent external connecting plates, each supporting mechanism comprises a main frame body, a first driving assembly and two internal connecting plates, and the internal connecting plates are in sliding connection with the main frame bodies; the first driving assembly drives the inner connecting plate to slide; a connecting slot is formed in the end, away from the first driving assembly, of the inner connecting plate, connecting protrusions are arranged on the two opposite sides of the outer connecting plate, the connecting protrusions can be inserted into the connecting slot so that the second mounting hole can be aligned with the first mounting hole, and the second mounting hole and the first mounting hole are connected through a connecting assembly; the bottom supporting assembly comprises a spiral head and a connecting rope, the connecting rope is detachably connected with the spiral head, a rope penetrating hole is transversely formed in the side wall body in a penetrating mode, and a rope locking piece is arranged on the side, away from the side wall of the foundation pit, of the side wall body. The foundation pit supporting device is adopted in the installation method of the foundation pit supporting device.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit construction, and in particular to a foundation pit supporting device and an installation method. Background Art

[0002] The foundation pit is a soil pit excavated at the foundation design location according to the base elevation and foundation plane dimensions. Before excavation, the excavation plan should be determined based on geological and hydrological data and the conditions of nearby buildings on site, and waterproofing and drainage work should be done. The foundation pit is a temporary project, and its function is to provide a space so that the foundation masonry work can be carried out according to the location specified in the design. In related technologies, in order to avoid the collapse of the foundation pit during construction, support devices are generally set up along the perimeter of the foundation pit to support the side walls of the foundation pit.

[0003] The existing foundation pit support device uses a plurality of connecting plates to connect in sequence to form a wall, and an inclined support is provided on the side of the connecting plate away from the side wall of the foundation pit, and the inclined support is used to support the connecting plate to abut against the side wall of the foundation pit. Since the sizes of each foundation pit are different, the required wall lengths are also different, so it is necessary to set connecting plates of various sizes, which increases the manufacturing cost, and requires targeted installation during assembly, which is difficult to assemble and prolongs the construction time. Summary of the invention

[0004] The object of the present invention is to provide a foundation pit supporting device and an installation method to solve the technical problems of high manufacturing cost and long assembly time existing in the prior art.

[0005] As conceived above, the technical solution adopted by the present invention is:

[0006] A foundation pit support device comprises a side wall and a bottom support assembly;

[0007] The side wall includes a plurality of external plates arranged at intervals, a group of support mechanisms are arranged between adjacent external plates, the support mechanism includes a main frame, a first drive assembly and two internal plates, the internal plates are slidably connected to the main frame, and a group of first drive assemblies are arranged for each of the internal plates, the first drive assembly is arranged in the main frame and located between the two internal plates to drive the internal plates to slide;

[0008] A connecting slot is provided at one end of the internal connecting plate away from the first driving assembly, a first mounting hole is provided at both upper and lower sides of the connecting slot, connecting protrusions are provided at both opposite sides of the external connecting plate, a second mounting hole is provided on the external connecting plate and passes through the connecting protrusion in a vertical direction, the connecting protrusion can be inserted into the connecting slot so that the second mounting hole is aligned with the first mounting hole, and the second mounting hole is connected to the first mounting hole through a connecting assembly;

[0009] The connecting assembly includes a second driving assembly and a second slider, the second driving assembly is arranged on the external plate and is used to drive the second slider to move, the second slider is inserted into the second mounting hole and can be inserted into the first mounting hole;

[0010] The bottom support assembly includes a spiral head and a connecting rope, which is detachably connected to the spiral head. A rope threading hole for threading the connecting rope is transversely arranged on the side wall, and a rope locking member for locking the connecting rope is arranged on the side of the side wall away from the foundation pit.

[0011] Preferably, the second drive assembly includes a drive cylinder; or, the second drive assembly includes a second motor and a second screw, the second motor is used to drive the second screw to rotate, the second screw has two sections of threads with opposite rotation directions, and each section of the thread is threaded with a second slider.

[0012] Preferably, the second driving assembly further includes a first driving gear and a first driven gear, the first driving gear is connected to the motor shaft of the second motor, the first driven gear is fixedly connected to the second screw rod, and the first driven gear is meshed with the first driving gear.

[0013] Preferably, mounting grooves are provided on two opposite sides of the external connecting plate, the mounting grooves are connected to the second mounting holes, and the second driving assembly is arranged in the mounting grooves.

[0014] Preferably, the main frame has a limiting cavity with openings at both ends, the internal connecting plate is slidably disposed in the limiting cavity, and the external connecting plate can be inserted into the limiting cavity along a first direction and plugged with the internal connecting plate.

[0015] Preferably, a limiting protrusion is provided on the surface of the external board, and a limiting groove is provided on the main frame body, the limiting groove extends along the first direction, and the limiting protrusion can slide along the limiting groove.

[0016] Preferably, a avoidance hole is provided on a side of the side wall of the main frame away from the foundation pit, the avoidance hole is connected to the limiting cavity and faces the position of the first driving component, and the rope threading hole is provided on the main frame in the area where the avoidance hole is located.

[0017] Preferably, the first driving component includes a driving cylinder; or, the first driving component includes a first motor, a first screw and a first slider, the first motor is arranged in the main frame and is used to drive the first screw to rotate, the first slider is sleeved on the first screw and is threadedly connected to the first screw, and the first slider is fixedly connected to the internal plate.

[0018] Preferably, it further includes a top support assembly, which includes a plurality of cross bars and reinforcing bars, wherein the cross bars are arranged between two opposite main frames, the cross bars are arranged between two opposite external connecting plates, and the reinforcing bars are arranged between adjacent cross bars.

[0019] A method for installing a foundation pit support device, using the foundation pit support device as described above, comprising:

[0020] The process of connecting the external connecting plate and the internal connecting plate is as follows: inserting the connecting protrusion of the external connecting plate into the connecting slot of the internal connecting plate so that the second mounting hole is aligned with the first mounting hole, and the second driving assembly drives the second slider to move so that the second slider passes through the second mounting hole and at least partially moves into the first mounting hole, so that the second mounting hole is connected to the first mounting hole, that is, the external connecting plate is connected to the internal connecting plate;

[0021] The position adjustment process of the internal connecting plate: before the external connecting plate is connected to the internal connecting plate, the position of the internal connecting plate is adjusted by the first driving assembly; and / or after the external connecting plate is connected to the internal connecting plate, the position of the internal connecting plate is adjusted by the first driving assembly, and when the internal connecting plate slides along the main frame, the external connecting plate is driven to slide along the main frame;

[0022] The installation process of the bottom support assembly is as follows: connect one end of the connecting rope to the spiral head, and drive the spiral head into the soil at the bottom of the foundation pit so that the spiral head is located on the side of the side wall close to the side wall of the foundation pit, pass the other end of the connecting rope through the rope hole on the side wall, and lock the connecting rope with the rope locking piece so that the side wall is against the side wall of the foundation pit.

[0023] Beneficial effects of the present invention:

[0024] The foundation pit support device proposed by the present invention has a side wall body including a plurality of external plates arranged at intervals, a group of support mechanisms are arranged between adjacent external plates, the support mechanism includes a main frame, a first drive assembly and two internal plates, the internal plates are slidably connected to the main frame, and a group of first drive assemblies are arranged for each internal plate, the first drive assembly is arranged in the main frame and located between the two internal plates to drive the internal plates to slide; by adjusting the position of the internal plates, the length of the support mechanism can be adjusted, thereby adapting to foundation pits of different sizes, and the adaptability range is wide, reducing costs. The external plate and the internal plate are plugged into the connection protrusion and the connection slot, and the second slider is driven to move by the second drive assembly, so that the second slider passes through the second mounting hole and at least partially moves into the first mounting hole, so that the second mounting hole is connected to the first mounting hole, that is, the external plate is connected to the internal plate, which is convenient for assembly and disassembly, saves time, and reduces labor intensity. The bottom support assembly includes a spiral head and a connecting rope, one end of the connecting rope is connected to the spiral head, the spiral head is driven into the soil at the bottom of the foundation pit, and the other end of the connecting rope passes through the rope threading hole on the side wall and is locked with the rope locking piece, wherein the spiral head is located on the side of the side wall close to the side wall of the foundation pit, and the rope locking piece is located on the side of the side wall away from the side wall of the foundation pit, does not occupy the internal space of the foundation pit, and realizes that the connecting rope tightens the side wall to prevent collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a first structural schematic diagram of a foundation pit supporting device provided by an embodiment of the present invention;

[0026] Figure 2 is a second structural schematic diagram of the foundation pit supporting device provided by an embodiment of the present invention;

[0027] Figure 3 is a first structural schematic diagram of a side wall provided by an embodiment of the present invention;

[0028] Figure 4 is a second structural schematic diagram of a side wall provided by an embodiment of the present invention;

[0029] Figure 5 is a structural schematic diagram of a support mechanism provided by an embodiment of the present invention;

[0030] Figure 6 is a structural schematic diagram of a main frame provided by an embodiment of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the cooperation between the external board and the internal board provided by an embodiment of the present invention;

[0032] Figure 8 is a structural schematic diagram of an internal connecting plate and a first driving assembly provided in an embodiment of the present invention;

[0033] Fig. 9is a structural schematic diagram of an external board and a connection assembly provided by an embodiment of the present invention;

[0034] Fig.10 is a schematic structural diagram of an external board provided by an embodiment of the present invention;

[0035] Fig.11 is a schematic diagram of the structure of a connection assembly provided by an embodiment of the present invention;

[0036] Fig.12 It is a schematic diagram of the structure of the right-angle piece and the diagonal brace provided in an embodiment of the present invention.

[0037] In the figure:

[0038] 10. Side wall;

[0039] 11. External board; 111. Connecting protrusion; 112. Second mounting hole; 113. Mounting slot; 114. Limiting protrusion;

[0040] 12. Support mechanism; 121. Main frame; 1211. Limiting cavity; 1212. Limiting groove; 1213. Avoidance hole; 122. First driving assembly; 123. Internal connecting plate; 1231. Connection slot; 1232. First mounting hole;

[0041] 13. Connecting assembly; 131. Second driving assembly; 1311. Second motor; 1312. Second screw rod; 1313. First driving gear; 1314. First driven gear; 132. Second slider;

[0042] 20. Bottom support assembly; 21. Screw head; 22. Connecting rope; 23. Right angle piece; 24. Diagonal brace;

[0043] 30. Top support assembly; 31. Cross bar; 32. Reinforcement bar. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0048] See also Figures 1 to 12The embodiment of the present invention provides a foundation pit support device, including a side wall 10 and a bottom support assembly 20; the side wall 10 includes a plurality of external plates 11 arranged at intervals, a group of support mechanisms 12 are arranged between adjacent external plates 11, the support mechanism 12 includes a main frame 121, a first drive assembly 122 and two internal plates 123, the internal plates 123 are slidably connected to the main frame 121, and a group of first drive assemblies 122 are arranged for each internal plate 123, the first drive assembly 122 is arranged on the main frame 121 and is located between the two internal plates 123 to drive the internal plates 123 to slide; a connection slot 1231 is arranged at one end of the internal plate 123 away from the first drive assembly 122, and first mounting holes 1232 are provided on the upper and lower sides of the connection slot 1231, and connection protrusions 111 are provided on the opposite sides of the external plate 11, and the external plate 11 is provided with a A second mounting hole 112 passes through the connecting protrusion 111 in the vertical direction, and the connecting protrusion 111 can be inserted into the connecting slot 1231 so that the second mounting hole 112 is aligned with the first mounting hole 1232, and the second mounting hole 112 is connected to the first mounting hole 1232 through a connecting component 13; the connecting component 13 includes a second driving component 131 and a second slider 132, the second driving component 131 is arranged on the external plate 11 and is used to drive the second slider 132 to move, the second slider 132 is passed through the second mounting hole 112 and can be passed through the first mounting hole 1232; the bottom support component 20 includes a spiral head 21 and a connecting rope 22, the connecting rope 22 is detachably connected to the spiral head 21, a rope threading hole for passing the connecting rope 22 is horizontally passed through the side wall 10, and a rope locking member for locking the connecting rope 22 is arranged on the side of the side wall of the side wall 10 away from the foundation pit.

[0049] By adjusting the position of the internal plate 123, the length of the support mechanism 12 can be adjusted, so as to adapt to foundation pits of different sizes, which can be adapted to a wide range and reduce costs. The external plate 11 and the internal plate 123 are connected through the connecting protrusion 111 and the connecting slot 1231, and the second driving component 131 drives the second slider 132 to move, so that the second slider 132 passes through the second mounting hole 112 and at least partially moves into the first mounting hole 1232, so that the second mounting hole 112 is connected to the first mounting hole 1232, that is, the external plate 11 is connected to the internal plate 123, which is convenient for assembly and disassembly, saves time, and reduces labor intensity. The bottom support assembly 20 includes a spiral head 21 and a connecting rope 22, one end of the connecting rope 22 is connected to the spiral head 21, the spiral head 21 is driven into the soil at the bottom of the foundation pit, and the other end of the connecting rope 22 passes through the rope threading hole on the side wall 10 and is locked with the rope locking member, wherein the spiral head 21 is located on the side of the side wall of the side wall 10 close to the foundation pit, and the rope locking member is located on the side of the side wall of the side wall 10 away from the foundation pit, without occupying the internal space of the foundation pit, so that the connecting rope 22 tightens the side wall 10 to prevent collapse.

[0050] When the external board 11 and the internal board 123 need to be disassembled, the second driving assembly 131 drives the second slider 132 to move, so that the second slider 132 disengages from the first mounting hole 1232 and retracts into the second mounting hole 112, and the connecting protrusion 111 of the external board 11 can be pulled out from the connecting slot 1231 of the internal board 123, so that the external board 11 and the internal board 123 are disengaged.

[0051] In some embodiments, the second driving component 131 can be a driving cylinder, and a driving cylinder is provided for each second slider 132. For an external plate 11, both the upper and lower sides of the connecting protrusion 111 need to be connected to the connecting slot 1231, so four second sliders 132 are provided on each external plate 11.

[0052] In this embodiment, the second driving assembly 131 includes a second motor 1311 and a second screw 1312. The second motor 1311 is used to drive the second screw 1312 to rotate. The second screw 1312 has two sections of threads with opposite rotation directions, and each section of the threads is screwed with a second slider 132. The two second sliders 132 share one second screw 1312, which reduces the power source and saves energy. In other embodiments, a second motor 1311 and a second screw 1312 may also be provided for each second slider 132.

[0053] The second motor 1311 can be directly connected to the second screw rod 1312, or can be indirectly connected to the second screw rod 1312. In this embodiment, the second driving assembly 131 further includes a first driving gear 1313 and a first driven gear 1314, the first driving gear 1313 is connected to the motor shaft of the second motor 1311, the first driven gear 1314 is fixedly connected to the second screw rod 1312, and the first driven gear 1314 is meshed with the first driving gear 1313.

[0054] The external board 11 supports the second motor 1311, the first driving gear 1313 and the first driven gear 1314. For easy assembly, mounting grooves 113 are provided on opposite sides of the external board 11. The mounting grooves 113 are connected to the second mounting holes 112, and the second driving assembly 131 is arranged in the mounting grooves 113. By providing the mounting grooves 113, it is convenient to assemble the second motor 1311, the second screw rod 1312, the first driving gear 1313 and the first driven gear 1314 to the external board 11, and it is also convenient to repair and replace in case of failure, and it is also convenient to route the wires.

[0055] In this embodiment, the first driving assembly 122 includes a driving cylinder, and the driving cylinder drives the inner plate 123 to slide. In other embodiments, the first driving assembly 122 includes a first motor, a first screw and a first slider, the first motor is disposed on the main frame 121 and is used to drive the first screw to rotate, the first slider is sleeved on the first screw and is threadedly connected to the first screw, and the first slider is fixedly connected to the inner plate 123.

[0056] In some embodiments, the internal connecting plate 123 is disposed on the surface of the main frame 121 and is slidably connected to the main frame 121 via a slide rail. In this embodiment, the main frame 121 has a limiting cavity 1211 with openings at both ends, the internal connecting plate 123 is slidably disposed in the limiting cavity 1211, and the external connecting plate 11 can be inserted into the limiting cavity 1211 along a first direction and plugged with the internal connecting plate 123. The limiting cavity 1211 limits the internal connecting plate 123, and the internal connecting plate 123 can be completely located in the limiting cavity 1211, or partially located in the limiting cavity 1211 and partially located outside the limiting cavity 1211.

[0057] In this embodiment, the internal board 123 is completely located inside the main frame 121, and part of the external board 11 is inserted into the limiting cavity 1211, so the limiting cavity 1211 also limits the external board 11. When the position of the internal board 123 is adjusted, the external board 11 can be pushed to move at the same time.

[0058] A limiting protrusion 114 is provided on the surface of the external board 11, and a limiting groove 1212 is provided on the main frame 121. The limiting groove 1212 extends along the first direction, and the limiting protrusion 114 can slide along the limiting groove 1212. When the external board 11 is inserted into the limiting cavity 1211 along the first direction, the limiting protrusion 114 is inserted into the limiting groove 1212, and the limiting protrusion 114 cooperates with the limiting groove 1212 to limit the external board 11.

[0059] The number of the limiting protrusions 114 on the external board 11 can be set according to actual needs. In this embodiment, three limiting protrusions 114 are provided on the external board 11. By providing the limiting protrusions 114 on the external board 11, it is convenient to connect the external board 11 and the bottom support assembly 20.

[0060] A side of the side wall of the main frame 121 away from the foundation pit is provided with an avoidance hole 1213, which is connected to the limiting cavity 1211 and directly faces the position of the first drive assembly 122. By providing the avoidance hole 1213, it is convenient to install the first drive assembly 122 and also convenient to route the first drive assembly 122. By providing the avoidance hole 1213, the first drive assembly 122 is exposed inside the foundation pit, which is convenient for the operator to operate and is convenient for maintenance or replacement in case of failure.

[0061] A rope threading hole is provided on the main frame 121 in the area where the avoidance hole 1213 is located. The rope threading hole is provided in the area where the avoidance hole 1213 is located, so that the connecting rope 22 can pass through the position of the avoidance hole 1213 to connect with the rope locking member. The rope locking member is a locking rod or a locking hook. Since the inner plate 123 is located inside the main frame 121 and the position is adjustable, it is not convenient to set the rope threading hole. The rope threading hole can be set on the external plate 11 and / or the main frame 121. The height of the rope threading hole from the ground can be set according to actual needs. For example, the rope threading hole can be set in the middle position in the height direction of the side wall 10 to play a stable pulling effect on the side wall 10.

[0062] For the bottom support assembly 20, the screw head 21 is located on one side of the side wall of the side wall 10 close to the foundation pit, and the outer surface of the screw head 21 is provided with grooves, protrusions or threads to increase the contact area with the soil and ensure stability. The screw head 21 has a hook for hooking the connecting rope 22 or winding the connecting rope 22 around the hook.

[0063] In order to further improve the stability of the side wall 10, the bottom support assembly 20 also includes a right-angle piece 23 and a diagonal brace 24. The right-angle piece 23 includes two mutually perpendicular base plates. Each right-angle piece 23 is provided with a diagonal brace 24. The diagonal brace 24 is supported between the two base plates. The external plate 11 and the main frame 121 are provided with a right-angle piece 23 on one side of the side wall away from the foundation pit. The right-angle piece 23 is fixedly connected to the bottom soil of the foundation pit, specifically by screws. The diagonal brace 24 and the base plate can be welded. The right-angle piece 23 can be set at a position close to the ground of the side wall 10 to reduce the occupation of the internal space of the foundation pit.

[0064] The foundation pit support device also includes a top support assembly 30, which includes a plurality of cross bars 31 and a reinforcing bar 32. A cross bar 31 is provided between two opposite main frames 121, a cross bar 31 is provided between two opposite external plates 11, and a reinforcing bar 32 is provided between adjacent cross bars 31. By providing the top support assembly 30, it is convenient to support the top of the side wall 10, so that the side wall 10 is more stable. The cross bar 31 and the reinforcing bar 32 can be integrally formed. The cross bar 31 and the main frame 121 or the external plate 11 can be bolted to facilitate installation and disassembly. The reinforcing bar 32 can be perpendicular to the cross bar 31, or can be tilted relative to the cross bar 31. By relatively densely arranging the cross bar 31 and the reinforcing bar 32, dangerous objects such as falling rocks that fall from the top of the foundation pit can be received, thereby protecting the personnel in the foundation pit.

[0065] Generally, the foundation pit is a rectangular pit, and four side walls 10 are arranged along the inner wall of the foundation pit. The four side walls 10 can be independent of each other and assembled separately, and the top support assembly 30 can be arranged between two opposite side walls 10. For each side wall 10, multiple external plates 11 and multiple groups of support mechanisms 12 are arranged alternately in sequence, and the position of the internal plates 123 can be adjusted as needed to adapt to the length or width of the foundation pit.

[0066] This embodiment also provides an installation method of a foundation pit support device, which uses the above-mentioned foundation pit support device, including: a connection process of the external plate 11 and the internal plate 123, a position adjustment process of the internal plate 123, an installation process of the bottom support assembly 20 and an installation process of the top support assembly 30.

[0067] During the connection process between the external board 11 and the internal board 123, the connection protrusion 111 of the external board 11 is inserted into the connection slot 1231 of the internal board 123, so that the second mounting hole 112 is aligned with the first mounting hole 1232, and the second driving component 131 drives the second slider 132 to move, so that the second slider 132 passes through the second mounting hole 112 and at least partially moves into the first mounting hole 1232, so that the second mounting hole 112 is connected to the first mounting hole 1232, that is, the external board 11 is connected to the internal board 123. When the external board 11 and the internal board 123 are disassembled, the second driving component 131 drives the second slider 132 to move, so that the second slider 132 is disengaged from the first mounting hole 1232 and retracted into the second mounting hole 112, so that the external board 11 and the internal board 123 can be disengaged.

[0068] The position adjustment process of the inner plate 123 can be performed before the outer plate 11 is connected to the inner plate 123, or after the outer plate 11 is connected to the inner plate 123. Before the outer plate 11 is connected to the inner plate 123, the position of the inner plate 123 is adjusted by the first driving assembly 122, and then the outer plate 11 is connected to the inner plate 123. After the outer plate 11 is connected to the inner plate 123, the position of the inner plate 123 is adjusted by the first driving assembly 122, and the outer plate 11 is driven to slide along the main frame 121 during the sliding process of the inner plate 123 along the main frame 121. When assembling the side wall 10, as the length of the side wall 10 increases, only the positions of the inner plates 123 at both ends of the side wall 10 are easy to adjust, and other adjustment plates are not easy to adjust because they are located in the middle position. By adjusting the inner plates 123 at both ends of the side wall 10, it is easy to adapt the length or width of the foundation pit.

[0069] During the installation of the bottom support assembly 20, one end of the connecting rope 22 is connected to the spiral head 21, and the spiral head 21 is driven into the soil at the bottom of the foundation pit, so that the spiral head 21 is located on the side of the side wall 10 close to the side wall of the foundation pit, and the other end of the connecting rope 22 is passed through the rope hole on the side wall 10, and the connecting rope 22 is locked with the rope locking piece so that the side wall 10 is against the side wall of the foundation pit.

[0070] The installation process of the bottom support assembly 20 also includes locking one end of the right-angle piece 23 to the external plate 11 or the main frame 121 by bolts, and locking the other end of the right-angle piece 23 to the bottom soil of the foundation pit by screws, and the screws can be driven into the bottom soil.

[0071] During the installation of the top support assembly 30 , for the two oppositely disposed side walls 10 , one end of the cross bar 31 is connected to one side wall 10 by bolts, and the other end of the cross bar 31 is connected to the other side wall 10 by bolts.

[0072] The extension length of the side wall 10 is determined according to the size of the foundation pit. If the length of the side wall 10 is long, the side wall 10 can be divided into multiple sections and installed in sequence. For example, for two sections of the side wall 10, after the first section of the side wall 10 is abutted against the side wall of the foundation pit through the connecting rope 22, the second section of the side wall 10 is connected to the first section of the side wall 10. Specifically, the external plate 11 of the first section of the side wall 10 is connected to the internal plate 123 of the second section of the side wall 10, and then the second side wall 10 is abutted against the side wall of the foundation pit through the connecting rope 22.

[0073] By adjusting the position of the inner connecting plate 123, the length of the support mechanism 12 can be adjusted, thereby changing the length of the side wall 10 to adapt to foundation pits of different sizes. The external connecting plate 11 and the inner connecting plate 123 are plugged into the connection protrusion 111 and the connection slot 1231, and are connected through the connection component 13, which is convenient for assembly and disassembly, and can be recycled after the foundation pit support is completed.

[0074] The spiral head 21 and the connecting rope 22 in the bottom support assembly 20 cooperate to apply tension to the outer side of the side wall 10, and the right-angle piece 23 and the diagonal brace rod 24 cooperate to apply support force to the inner side of the side wall 10, making the side wall 10 more stable. By providing the top support assembly 30, it is convenient to support the top of the side wall 10, making the side wall 10 more stable.

[0075] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A foundation pit support device, characterized in that: It comprises a side wall body (10) and a bottom support assembly (20); The side wall (10) comprises a plurality of external plates (11) arranged at intervals, a group of support mechanisms (12) are arranged between adjacent external plates (11), the support mechanism (12) comprises a main frame (121), a first drive assembly (122) and two internal plates (123), the internal plates (123) are slidably connected to the main frame (121), a group of first drive assemblies (122) are arranged for each of the internal plates (123), the first drive assembly (122) is arranged on the main frame (121) and is located between the two internal plates (123) to drive the internal plates (123) to slide; A connecting slot (1231) is provided at one end of the internal connecting plate (123) away from the first driving assembly (122); first mounting holes (1232) are provided on both upper and lower sides of the connecting slot (1231); connecting protrusions (111) are provided on both opposite sides of the external connecting plate (11); a second mounting hole (112) is provided on the external connecting plate (11) and passes through the connecting protrusion (111) in a vertical direction; the connecting protrusion (111) can be inserted into the connecting slot (1231) so that the second mounting hole (112) is aligned with the first mounting hole (1232); and the second mounting hole (112) is connected to the first mounting hole (1232) via a connecting assembly (13); The connecting component (13) comprises a second driving component (131) and a second sliding block (132); the second driving component (131) is arranged on the external connecting plate (11) and is used to drive the second sliding block (132) to move; the second sliding block (132) is inserted into the second mounting hole (112) and can be inserted into the first mounting hole (1232); The bottom support assembly (20) comprises a spiral head (21) and a connecting rope (22), wherein the connecting rope (22) is detachably connected to the spiral head (21), a rope threading hole for threading the connecting rope (22) is transversely provided on the side wall (10), and a rope locking member for locking the connecting rope (22) is provided on a side of the side wall of the side wall (10) away from the foundation pit.

2. The foundation pit supporting device according to claim 1, characterized in that: The second driving assembly (131) includes a driving cylinder; or the second driving assembly (131) includes a second motor (1311) and a second screw (1312), wherein the second motor (1311) is used to drive the second screw (1312) to rotate, and the second screw (1312) has two sections of threads with opposite rotation directions, and each section of the thread is screwed with a second slider (132).

3. The foundation pit supporting device according to claim 2, characterized in that: The second driving assembly (131) further comprises a first driving gear (1313) and a first driven gear (1314), wherein the first driving gear (1313) is connected to the motor shaft of the second motor (1311), the first driven gear (1314) is fixedly connected to the second screw rod (1312), and the first driven gear (1314) is meshed with the first driving gear (1313).

4. The foundation pit supporting device according to claim 1, characterized in that: The external connecting plate (11) is provided with mounting grooves (113) on opposite sides thereof, the mounting grooves (113) are connected to the second mounting holes (112), and the second driving assembly (131) is arranged in the mounting grooves (113).

5. The foundation pit supporting device according to claim 1, characterized in that: The main frame (121) has a limiting cavity (1211) with openings at both ends, the internal connection plate (123) is slidably arranged in the limiting cavity (1211), and the external connection plate (11) can be inserted into the limiting cavity (1211) along a first direction and plugged into the internal connection plate (123).

6. The foundation pit supporting device according to claim 5, characterized in that: A limiting protrusion (114) is provided on the surface of the external plate (11), and a limiting groove (1212) is provided on the main frame (121), wherein the limiting groove (1212) extends along the first direction, and the limiting protrusion (114) can slide along the limiting groove (1212).

7. The foundation pit supporting device according to claim 5, characterized in that: A side of the main frame (121) away from the side wall of the foundation pit is provided with an avoidance hole (1213), the avoidance hole (1213) is connected with the limiting cavity (1211) and is directly opposite to the position of the first driving component (122), and the main frame (121) is provided with the rope threading hole in the area where the avoidance hole (1213) is located.

8. The foundation pit supporting device according to claim 1, characterized in that: The first driving component (122) includes a driving cylinder; or the first driving component (122) includes a first motor, a first screw and a first slider, the first motor is arranged on the main frame (121) and is used to drive the first screw to rotate, the first slider is sleeved on the first screw and is threadedly connected to the first screw, and the first slider is fixedly connected to the internal plate (123).

9. The foundation pit supporting device according to any one of claims 1 to 8, characterized in that: The invention also comprises a top support assembly (30), wherein the top support assembly (30) comprises a plurality of cross bars (31) and reinforcing bars (32), wherein the cross bars (31) are arranged between two opposite main frames (121), the cross bars (31) are arranged between two opposite external connecting plates (11), and the reinforcing bars (32) are arranged between adjacent cross bars (31).

10. A method for installing a foundation pit support device, characterized in that: The foundation pit supporting device according to any one of claims 1 to 9 comprises: The process of connecting the external connecting plate (11) and the internal connecting plate (123) is as follows: inserting the connecting protrusion (111) of the external connecting plate (11) into the connecting slot (1231) of the internal connecting plate (123) so that the second mounting hole (112) is aligned with the first mounting hole (1232); the second driving component (131) drives the second sliding block (132) to move so that the second sliding block (132) passes through the second mounting hole (112) and at least partially moves into the first mounting hole (1232), thereby realizing the connection between the second mounting hole (112) and the first mounting hole (1232), that is, the external connecting plate (11) and the internal connecting plate (123) are connected; The position adjustment process of the internal connecting plate (123) includes: before the external connecting plate (11) is connected to the internal connecting plate (123), the position of the internal connecting plate (123) is adjusted by the first driving component (122); and / or after the external connecting plate (11) is connected to the internal connecting plate (123), the position of the internal connecting plate (123) is adjusted by the first driving component (122), and when the internal connecting plate (123) slides along the main frame (121), the external connecting plate (11) is driven to slide along the main frame (121); The installation process of the bottom support assembly (20) is as follows: one end of the connecting rope (22) is connected to the spiral head (21), and the spiral head (21) is driven into the soil at the bottom of the foundation pit so that the spiral head (21) is located on the side of the side wall (10) close to the side wall of the foundation pit, the other end of the connecting rope (22) is passed through the rope threading hole on the side wall (10), and the connecting rope (22) is locked with the rope locking member so that the side wall (10) and the side wall of the foundation pit are butted against each other.

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