Foundation pit supporting device and using method thereof

Abstract

The invention relates to the technical field of foundation pit supporting, and discloses a foundation pit supporting device and a using method thereof.The foundation pit supporting device comprises a bottom supporting assembly, the bottom supporting assembly comprises four supporting frames and a plurality of connecting pieces, the four supporting frames are spliced into a supporting frame, and every two adjacent supporting frames are connected in a limited mode through the corresponding connecting piece; the side supporting assembly comprises a plurality of side supporting plates and a plurality of supporting pieces, the side supporting plates are spliced into side plates and installed on the supporting frame, the supporting pieces are arranged on the side supporting plates, and the side supporting plates are connected with the supporting frame through the supporting pieces; and the stabilizing assembly comprises a plurality of first stabilizing pieces and a plurality of second stabilizing pieces, the supporting frame is in limiting connection with the foundation pit through the first stabilizing pieces, and the second stabilizing pieces are arranged on the connecting pieces, penetrate through the supporting frame and extend into the soil layer of the foundation pit. The foundation pit supporting structure is simple in structure, convenient to splice on site and suitable for foundation pits of different sizes, stable supporting is formed between the overall structure and the foundation pits after the overall structure is installed, and then the foundation pit supporting effect is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit support, and in particular to a foundation pit support device and a use method thereof. 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 situation of nearby buildings on site, and waterproofing and drainage should be done well. BIM technology should be used in advance to collect relevant information such as the building data of the foundation pit for modeling, excavation and finally foundation pit support. Foundation pit support refers to the engineering measures taken during foundation pit excavation to ensure the stability of the pit wall, protect the safety of the main underground project during construction, and protect the surrounding environment from damage.

[0003] Support is an essential equipment for foundation pits. The traditional reinforced concrete support foundation pit construction process requires first driving bored piles at the edge of the foundation pit, lowering the steel mesh and pouring concrete, and then excavating the central soil and adding support after the concrete strength reaches the requirement. The overall construction process is complicated and takes a long time. In the existing technology, the support of the foundation pit is realized by combining prefabricated components and various parts. The splicing is relatively complicated, the adaptation range is small, and it cannot be adjusted according to different foundation pits. Moreover, after splicing, a stable support cannot be formed between the foundation pit and the foundation pit, which makes the side wall easy to become unstable.

[0004] Therefore, there is an urgent need for a foundation pit support device and a method of using the same to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a foundation pit support device and a method of using the same to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a foundation pit support device, comprising:

[0007] A bottom support assembly is located at the bottom end of the foundation pit. The bottom support assembly includes four support frames and a plurality of connectors. The four support frames are spliced ​​into a support frame. The support frames are adapted to the foundation pit. Two adjacent support frames are limitedly connected by the connectors.

[0008] A side support assembly, comprising a plurality of side support plates and a plurality of support members, wherein the plurality of side support plates are spliced ​​into a side plate and installed on the support frame and in contact with the inner wall side of the foundation pit, the support members are arranged on the side support plates, and the side support plates are connected to the support frame through the support members;

[0009] The stabilizing component includes a plurality of first stabilizing members and a plurality of second stabilizing members. The supporting frame is connected to the foundation pit through the first stabilizing members. The second stabilizing members are arranged on the connecting member and penetrate the supporting frame and extend into the soil layer of the foundation pit.

[0010] According to a foundation pit support device provided by the present invention, the support frame includes a plurality of support angle plates, a first sliding groove is opened on one side of the support angle plate, and a first slider is fixedly connected to the other side of the support angle plate. The first sliders on two adjacent support angle plates are slidably connected to the first sliding groove, and two adjacent support angle plates on two adjacent support frames are limitedly connected by the connecting piece.

[0011] According to a foundation pit support device provided by the present invention, the supporting angle plate includes a bottom plate and a side plate, the bottom plate and the side plate are fixedly connected and have an L-shaped structure, and the side plates located at both ends of the supporting frame are provided with a second sliding groove, and the connecting member includes a connecting block, and the adjacent two side walls of the connecting block are provided with a second sliding block, and the two second sliding blocks are respectively adapted to the two adjacent second sliding grooves.

[0012] According to a foundation pit support device provided by the present invention, a plug-in groove is provided on the top of the side plate, and the side support plate is plugged into the plug-in groove. The support member includes a fixed block fixedly connected to the side support plate, and the two ends of the fixed block are respectively rotatably connected to one end of two support rods, and the top two sides of the bottom plate are fixedly connected to top blocks, and the top block is provided with concave holes, and the other ends of the two support rods are respectively extended into the two concave holes and abut against the inner walls of the concave holes.

[0013] According to a foundation pit support device provided by the present invention, the first stabilizing member comprises:

[0014] The first connecting block has two third sliding blocks fixedly connected to the side wall, the side plate is provided with two third sliding grooves, and the two third sliding blocks are respectively slidably connected to the two third sliding grooves;

[0015] A second connecting block, the top and bottom of which are both fixedly connected with fourth sliding blocks, the bottom of the first connecting block and the top of the bottom plate are both provided with fourth sliding grooves, and the fourth sliding blocks are slidably connected with the fourth sliding grooves;

[0016] The control box is fixedly connected to the top of the second connection block. Two first plug-in rods are connected in the control box through a control member. The two first plug-in rods are respectively connected to the first connection block and the second connection block.

[0017] According to a foundation pit support device provided by the present invention, the control component includes a support frame rotatably connected to the control box, the support frame is rotatably connected with a horizontal rotation tube and a vertical rotation tube, the two first plug-in rods are respectively slidably connected in the horizontal rotation tube and the vertical rotation tube, the vertical rotation tube is fixedly connected with a first bevel gear, the horizontal rotation tube is fixedly connected with a first gear, the support frame is rotatably connected with a connecting shaft, the two ends of the connecting shaft are respectively fixedly connected with a second bevel gear and a second gear, the second bevel gear is meshed with the first bevel gear, and the second gear is meshed with the first gear.

[0018] According to a foundation pit support device provided by the present invention, the second stabilizing member includes a second plug-in rod, and the second plug-in rod is slidably connected to the connecting block.

[0019] According to a foundation pit support device provided by the present invention, one of the two bottom plates on two adjacent support frames is a single-layer structure, and the other bottom plate is a double-layer structure, and the single-layer bottom plate is located between the double-layer structures.

[0020] According to a foundation pit support device provided by the present invention, the cross-sections of the first slide groove, the second slide groove, the third slide groove and the fourth slide groove are all T-shaped.

[0021] A method for using a foundation pit support device comprises the following steps:

[0022] Splice the four support frames into a support frame and place it at the bottom of the foundation pit;

[0023] A limit connection between two adjacent supporting frames is achieved through a connecting piece;

[0024] Install the first stabilizing member on the supporting frame and extend it into the soil layer to achieve the connection between the supporting frame and the foundation pit;

[0025] Install the second stabilizing member on the connecting member and extend it through the soil layer of the foundation pit;

[0026] The side support plates are installed on the support frames, and are installed on the support frames through support members to achieve support for the foundation pit.

[0027] Compared with the prior art, the present invention has the following advantages and technical effects:

[0028] The present invention provides a foundation pit support device and a method of using the same. Four support frames are spliced ​​into a support frame, and the corners between two adjacent support frames are connected by a connector to ensure the stability of the entire support frame after splicing. The spliced ​​support frame is located at the bottom of the foundation pit, corresponding to the four sides of the foundation pit. After placement, a number of first stabilizing members are provided to achieve a stable connection between the support frame and the foundation pit. A second stabilizing member is installed on the connector to further achieve a stable connection between the four corners of the entire support frame and the foundation pit. After installation, the side support plate is installed on the support frame through the support member to achieve support for the side wall of the foundation pit, thereby achieving support for the entire foundation pit and ensuring the stability of the foundation pit. The present invention has a simple structure, convenient on-site splicing, and is suitable for foundation pits of different sizes. After the overall structure is installed, a stable support is formed between the structure and the foundation pit, thereby ensuring the foundation pit support effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle part;

[0032] Figure 3 For the present invention Figure 1 A partial enlarged view of point B in the middle;

[0033] Figure 4 This is a schematic diagram of the control box structure of the present invention;

[0034] Figure 5 For the present invention Figure 4 A partial enlarged view of point C in the middle;

[0035] Figure 6 This is a schematic diagram of the structure of the second stabilizing member of the present invention;

[0036] Among them, 1. support frame; 101. support angle plate; 1011. bottom plate; 1012. side plate; 1013. second slide groove; 1014. plug-in groove; 102. first slide groove; 103. first slider; 2. foundation pit; 3. side support plate; 4. connecting block; 5. second slider; 6. fixed block; 7. support rod; 8. top block; 9. recessed hole; 10. first connecting block; 11. third slider; 12. third slide groove; 13. fourth slider; 14. fourth slide groove; 15. control box; 16. first plug-in rod; 17. support frame; 18. horizontal rotating tube; 19. vertical rotating tube; 20. first bevel gear; 21. first gear; 22. connecting shaft; 23. second bevel gear; 24. second gear; 25. second plug-in rod; 26. second connecting block. DETAILED DESCRIPTION

[0037] 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.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] In the related technology, a combined foundation pit support device and a method of using the same are disclosed, which relate to the technical field of foundation pit support. The combined foundation pit support device and the method of using the same include a first support plate, a second support plate movably hinged on the first support plate, a connecting block fixedly connected to the second support plate, a card slot fixedly connected to the connecting block, two springs fixedly connected inside the card slot, two first moving blocks slidably connected inside the card slot, the other side ends of the two first moving blocks are respectively fixedly connected to the other side ends of the two springs, a connecting plate fixedly connected to the second support plate, a card block fixedly connected to the connecting plate, the card block cooperates with the card slot, the first moving block returns to its original position and forms a snap-on effect with the card block, so that the two foundation pit supports can be combined at will.

[0040] In the related art, an assembled foundation pit support device and a method thereof are disclosed, including a support device and a protective device, wherein the protective device includes an anti-collapse component, a protective plate, a steel pipe straight rod, a steel pipe cross bar, a support plate, a fixing plate, a base, a tapered rod and a fastening plate. The present invention realizes rapid support and rapid assembly with soil excavation by using prefabricated protective devices for assembly. The combination of the protective device and the support device maximizes the support effect and prevents the soil layer inside the foundation pit from collapsing inward. The assembly and assembly structure is adopted to improve the installation and disassembly speed. At the same time, the combination of the support device and the protective device makes the device structure stable, the support stability is good and the environmental tolerance is high. After the foundation pit support is completed, the support device can be recycled and reused, reducing the construction cost. By adding the anti-collapse component, the guide plate can make the rainwater outside the foundation pit flow to both sides on rainy days, avoiding damage to the support device when the rainwater is too large and the impact force is strong.

[0041] The related technology discloses a foundation pit supporting device for civil engineering and a construction method thereof, the supporting device comprises a supporting plate, a reinforcement plate and a stress groove are arranged on the front surface of the supporting plate, a mounting block is installed inside the stress groove, a rotating connection block is arranged in the middle of the mounting block, an adjusting support column is installed on the top of the rotating connection block, and a positioning base is installed on the bottom of the adjusting support column; the foundation pit supporting device for civil engineering of the present invention can effectively reinforce the supporting plate by using the reinforcement plate and the stress groove, and can also evenly distribute the force applied during support on the surface of the supporting plate; the rotating connection block and the adjusting support column can freely adjust the installation position of the positioning base according to the use requirements; the positioning groove can effectively fix the positioning base to the foundation pit ground by inserting the positioning pile into the ground; the design of connecting and fixing the supporting plate and the positioning base by adjusting the support column facilitates the installation and disassembly of the device.

[0042] In the above-mentioned related technologies, the support of the foundation pit is realized by combining prefabricated components and various parts, but the splicing is relatively complicated, the adaptation range is small, and it cannot be adjusted according to different foundation pits. Moreover, after splicing, a stable support cannot be formed between the foundation pit and the foundation pit, which makes the side wall easy to become unstable. In order to solve the above-mentioned problems, the present application discloses the following solutions:

[0043] Reference Figure 1-Figure 6 The present invention provides a foundation pit support device, comprising:

[0044] The bottom support assembly is located at the bottom end of the foundation pit 2. The bottom support assembly includes four support frames 1 and a plurality of connectors. The four support frames 1 are spliced ​​into a support frame. The support frames 1 are adapted to the foundation pit 2. Two adjacent support frames 1 are limitedly connected by connectors.

[0045] The side support assembly includes a plurality of side support plates 3 and a plurality of support members. The plurality of side support plates 3 are spliced ​​into side plates and installed on the support frame 1 and in contact with the inner wall side of the foundation pit 2. The support members are arranged on the side support plates 3. The side support plates 3 are connected to the support frame 1 through the support members.

[0046] The stabilizing assembly includes a plurality of first stabilizing members and a plurality of second stabilizing members. The supporting frame 1 is limitedly connected to the foundation pit 2 through the first stabilizing members. The second stabilizing members are arranged on the connecting members and penetrate the supporting frame 1 and extend into the soil layer of the foundation pit 2.

[0047] In one embodiment of the present invention, four support frames 1 are spliced ​​into a support frame, and the corners between two adjacent support frames 1 are connected by connecting pieces to ensure the stability of the entire support frame after splicing. The spliced ​​support frame is located at the bottom end of the inside of the foundation pit 2, corresponding to the four sides of the foundation pit 2. After installation, a stable connection between the support frame 1 and the foundation pit 2 is achieved by setting a number of first stabilizing members, and a second stabilizing member is installed on the connecting member to further achieve a stable connection between the four corners of the entire support frame and the foundation pit 2. After the installation is completed, the side support plate 3 is installed on the support frame 1 through the support member to achieve support for the side wall of the foundation pit 2, thereby achieving support for the entire foundation pit 2 and ensuring the stability of the foundation pit 2.

[0048] As an optional embodiment, the supporting frame 1 includes a plurality of supporting angle plates 101, a first sliding groove 102 is provided on one side of the supporting angle plate 101, a first slider 103 is fixedly connected to the other side of the supporting angle plate 101, the first slider 103 on two adjacent supporting angle plates 101 is slidably connected to the first sliding groove 102, and two adjacent supporting angle plates 101 on two adjacent supporting frames 1 are limitedly connected by a connecting piece.

[0049] In one embodiment of the present invention, two adjacent supporting angle plates 101 are connected by a first sliding block 103 and a first sliding groove 102, and are spliced ​​to form a supporting frame 1, which is adapted to foundation pits 2 of different sizes, and the overall installation and adjustment are convenient.

[0050] As an optional embodiment, the supporting angle plate 101 includes a bottom plate 1011 and a side plate 1012, the bottom plate 1011 and the side plate 1012 are fixedly connected and have an L-shaped structure, a second slide groove 1013 is provided on the side plate 1012 at both ends of the supporting frame 1, and the connecting part includes a connecting block 4, and second sliding blocks 5 are provided on the adjacent two side walls of the connecting block 4, and the two second sliding blocks 5 are respectively adapted to the two adjacent second slide grooves 1013.

[0051] In one embodiment of the present invention, the supporting angle plate 101 is formed by a bottom plate 1011 and a side plate 1012 fixedly connected, and the overall structure is an L-shaped structure corresponding to the four sides of the bottom end of the foundation pit 2. In addition, the second slider 5 is inserted into the second slide groove 1013 through the provided connecting block 4 to achieve limiting of the corners of the two supporting angle plates 101, thereby ensuring the stability of the four supporting frames 1 after splicing.

[0052] As an optional embodiment, a plug-in groove 1014 is provided at the top of the side panel 1012, and the side support panel 3 is plugged into the plug-in groove 1014. The support member includes a fixed block 6 fixedly connected to the side support panel 3, and both ends of the fixed block 6 are rotatably connected to one end of two support rods 7. Both sides of the top of the bottom plate 1011 are fixedly connected to top blocks 8, and a recessed hole 9 is provided on the top block 8. The other ends of the two support rods 7 are respectively extended into the two recessed holes 9 and abut against the inner walls of the recessed holes 9.

[0053] In one embodiment of the present invention, referring to Figure 3 After the support angle plate 101 is installed, the corresponding side support plate 3 is inserted into the insertion groove 1014. By adjusting the two support rods 7 so that one end thereof extends into the corresponding recessed hole 9, a triangular structure is formed as a whole, thereby improving the stability of the side support plate 3.

[0054] Specifically, the support rod 7 is composed of two rod parts, and a threaded tube is threadedly connected between opposite ends of the two rod parts. The distance between the two rod parts is adjusted by twisting the threaded tube, so that the support rod 7 is stably supported in the recessed hole 9.

[0055] As an optional implementation, the first stabilizing member includes:

[0056] The first connecting block 10 has two third sliding blocks 11 fixedly connected to the side wall, and the side plate 1012 has two third sliding grooves 12, and the two third sliding blocks 11 are slidably connected to the two third sliding grooves 12 respectively;

[0057] The second connecting block 26 has fourth sliders 13 fixedly connected to both the top and bottom ends. The first connecting block 10 has fourth slide grooves 14 formed on both sides of the bottom end and the top end of the bottom plate 1011. The fourth sliders 13 are slidably connected to the fourth slide grooves 14.

[0058] The control box 15 is fixedly connected to the top of the second connection block 26. Two first plug-in rods 16 are connected to the control box 15 through a control member. The two first plug-in rods 16 are connected to the first connection block 10 and the second connection block 26 respectively.

[0059] In one embodiment of the present invention, referring to Figure 4When in use, first install the first connecting block 10 and the side plate 1012 through the third slider 11 and the third slide groove 12. After installation, there is a gap between the bottom of the first connecting block 10 and the bottom plate 1011. The second connecting block 26 is connected to the gap through the horizontal insertion and the fourth slider 13 and the fourth slide groove 14. After installation, the control parts in the control box 15 control one of the first plug-in rods 16 to penetrate the side plate 1012 horizontally and extend into the soil layer of the foundation pit 2, and control the other first plug-in rod 16 to penetrate the bottom plate 1011 vertically and extend into the soil layer of the foundation pit 2, thereby realizing a stable connection between the entire supporting angle plate 101 and the foundation pit 2.

[0060] As an optional embodiment, the control member includes a support frame 17 rotatably connected to the control box 15, and a horizontal rotating tube 18 and a vertical rotating tube 19 are rotatably connected to the support frame 17. The two first plug-in rods 16 are respectively slidably connected in the horizontal rotating tube 18 and the vertical rotating tube 19. The vertical rotating tube 19 is fixedly connected with a first bevel gear 20, and the horizontal rotating tube 18 is fixedly connected with a first gear 21. A connecting shaft 22 is rotatably connected to the support frame 17, and a second bevel gear 23 and a second gear 24 are respectively fixedly connected at both ends of the connecting shaft 22. The second bevel gear 23 is meshed with the first bevel gear 20, and the second gear 24 is meshed with the first gear 21.

[0061] In one embodiment of the present invention, the horizontal rotating tube 18 and the vertical rotating tube 19 are both rotatably connected to the support frame 17, and the two first plug-in rods 16 are respectively slidably connected in the horizontal rotating tube 18 and the vertical rotating tube 19, and the cross-section of the sliding connection is rectangular, that is, the inside of the horizontal rotating tube 18 and the vertical rotating tube 19 is a rectangular slide groove, and the first plug-in rod 16 is respectively threadedly connected to the bottom wall and the side wall of the control box 15, and penetrates the control box 15 and is threadedly connected to the bottom plate 1011 and the side plate 1012. Specifically, one of the first plug-in rods 16 is controlled by a tool. The plug-in rod 16 rotates, and when it rotates, it is gradually extended into the soil layer through the threaded connection. When one of the first plug-in rods 16 is rotated, the other first plug-in rod 16 is synchronously driven to rotate through the meshing first bevel gear 20, second bevel gear 23, first gear 21 and second gear 24, and moved to extend into the soil layer. Through the vertical and synchronous plug-in of the two first plug-in rods 16, and in coordination with the first connecting block 10 and the second connecting block 26, its stability during installation is guaranteed to avoid its misalignment, and stable force is guaranteed to be smoothly plugged into the soil layer.

[0062] As an optional implementation, the second stabilizing member includes a second plug-in rod 25 , and the second plug-in rod 25 is slidably connected to the connecting block 4 .

[0063] In one embodiment of the present invention, referring to Figure 2The second plug-in rod 25 is slidably connected to the connecting block 4, and a through hole is opened on the bottom plate 1011, which is used to allow the second plug-in rod 25 to pass through the through hole and extend into the soil layer. The second plug-in rod 25 is nailed into the soil layer by a hammering tool, thereby realizing a stable connection between the entire support frame and the foundation pit 2.

[0064] As an optional implementation, one of the two bottom plates 1011 on two adjacent supporting frames 1 is a single-layer structure, and the other bottom plate 1011 is a double-layer structure, and the single-layer bottom plate 1011 is located between the double-layer structures.

[0065] In one embodiment of the present invention, referring to Figure 6 The two adjacent bottom plates 1011 at the corner are one single-layer structure and the other double-layer structure. During installation, the single-layer bottom plate 1011 needs to be inserted into the layer interval of the double-layer bottom plate 1011, so as to achieve stable installation of the two bottom plates 1011 at the corner. After installation, the plug-in connecting block 4 is placed on top to achieve preliminary limiting, and then the second plug-in rod 25 is installed to limit the bottom plate 1011 and the connecting block 4, so as to achieve stable connection between the bottom plate 1011 and the foundation pit 2.

[0066] As an optional implementation, the cross-sections of the first slide groove 102 , the second slide groove 1013 , the third slide groove 12 and the fourth slide groove 14 are all T-shaped.

[0067] In one embodiment of the present invention, the cross-sections of structures such as the slide groove and the slider are all T-shaped, thereby ensuring their stability after connection.

[0068] A method for using a foundation pit support device comprises the following steps:

[0069] Splice four support frames 1 into a support frame and place it at the bottom of the foundation pit 2;

[0070] In one embodiment of the present invention, a plurality of supporting angle plates 101 are spliced ​​together to form a whole supporting frame 1, and four supporting frames 1 are placed on the four sides of the foundation pit 2 respectively.

[0071] A limit connection between two adjacent support frames 1 is achieved through a connecting piece;

[0072] The corners between two adjacent support frames 1 are connected by connecting blocks 4, and the stability of the entire support frame is ensured after the connection.

[0073] Install the first stabilizing member on the supporting frame 1 and extend it into the soil layer to achieve the connection between the supporting frame 1 and the foundation pit 2;

[0074] The first connection block 10 and the second connection block 26 are installed on the corresponding support angle plate 101, and the two first plug-in rods 16 are respectively inserted into the soil layer of the foundation pit 2 along the vertical and horizontal directions to achieve a stable connection between the support frame 1 and the foundation pit 2.

[0075] Install the second stabilizing member on the connecting member and extend it through the soil layer of the foundation pit 2;

[0076] The second plug-in rod 25 is inserted through the connecting block 4 into the soil layer to further ensure the stable connection between the four corners of the supporting frame and the foundation pit 2.

[0077] The side support plate 3 is installed on the support frame 1 and is installed on the support frame 1 through a support member to achieve support for the foundation pit 2.

[0078] The side support plates 3 are installed on the corresponding support angle plates 101 to support the side walls of the entire foundation pit 2.

[0079] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0080] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A foundation pit support device, characterized in that: include: A bottom support assembly is located at the bottom end of the foundation pit (2), the bottom support assembly comprises four support frames (1) and a plurality of connecting pieces, the four support frames (1) are spliced ​​into a support frame, the support frames (1) are adapted to the foundation pit (2), and two adjacent support frames (1) are limitedly connected by the connecting pieces; A side support assembly, comprising a plurality of side support plates (3) and a plurality of support members, wherein the plurality of side support plates (3) are spliced ​​into a side plate and mounted on the support frame (1) and in contact with the inner wall of the foundation pit (2), the support members are arranged on the side support plates (3), and the side support plates (3) are connected to the support frame (1) via the support members; The stabilizing component comprises a plurality of first stabilizing members and a plurality of second stabilizing members, wherein the support frame (1) is positionally connected to the foundation pit (2) via the first stabilizing members, and the second stabilizing members are arranged on the connecting member and penetrate through the support frame (1) and extend into the soil layer of the foundation pit (2).

2. A foundation pit support device according to claim 1, characterized in that: The supporting frame (1) comprises a plurality of supporting angle plates (101), one side of the supporting angle plates (101) is provided with a first sliding groove (102), the other side of the supporting angle plates (101) is fixedly connected with a first sliding block (103), the first sliding blocks (103) on two adjacent supporting angle plates (101) are slidably connected to the first sliding groove (102), and the adjacent two supporting angle plates (101) on two adjacent supporting frames (1) are limitedly connected via the connecting member.

3. A foundation pit support device according to claim 2, characterized in that: The supporting angle plate (101) comprises a bottom plate (1011) and a side plate (1012), wherein the bottom plate (1011) and the side plate (1012) are fixedly connected and present an L-shaped structure, and the side plates (1012) located at both ends of the supporting frame (1) are provided with second slide grooves (1013), and the connecting member comprises a connecting block (4), and second sliding blocks (5) are provided on adjacent side walls of the connecting block (4), and the two second sliding blocks (5) are respectively adapted to the two adjacent second slide grooves (1013).

4. A foundation pit support device according to claim 3, characterized in that: The top of the side plate (1012) is provided with an insertion groove (1014), and the side support plate (3) is inserted into the insertion groove (1014). The support member comprises a fixed block (6) fixedly connected to the side support plate (3), and the two ends of the fixed block (6) are respectively rotatably connected to one end of two support rods (7). The top of the bottom plate (1011) is fixedly connected to top blocks (8) on both sides, and a concave hole (9) is provided on the top block (8). The other ends of the two support rods (7) are respectively extended into the two concave holes (9) and abut against the inner walls of the concave holes (9).

5. A foundation pit support device according to claim 3, characterized in that: The first stabilizing member comprises: The first connecting block (10) has two third sliding blocks (11) fixedly connected to the side wall, the side plate (1012) is provided with two third sliding grooves (12), and the two third sliding blocks (11) are respectively slidably connected to the two third sliding grooves (12); The second connecting block (26) is fixedly connected with a fourth sliding block (13) on both sides of the top and bottom ends, and fourth sliding grooves (14) are provided on both sides of the bottom end of the first connecting block (10) and both sides of the top end of the bottom plate (1011), and the fourth sliding block (13) is slidably connected with the fourth sliding groove (14); A control box (15) is fixedly connected to the top of the second connection block (26); two first plug-in rods (16) are connected inside the control box (15) through a control member; the two first plug-in rods (16) are respectively connected to the first connection block (10) and the second connection block (26).

6. A foundation pit support device according to claim 5, characterized in that: The control member comprises a support frame (17) rotatably connected to the control box (15); a transverse rotating tube (18) and a vertical rotating tube (19) are rotatably connected to the support frame (17); the two first plug-in rods (16) are respectively slidably connected to the transverse rotating tube (18) and the vertical rotating tube (19); a first bevel gear (20) is fixedly connected to the vertical rotating tube (19); a first gear (21) is fixedly connected to the transverse rotating tube (18); a connecting shaft (22) is rotatably connected to the support frame (17); two ends of the connecting shaft (22) are respectively fixedly connected to a second bevel gear (23) and a second gear (24); the second bevel gear (23) is meshed with the first bevel gear (20); and the second gear (24) is meshed with the first gear (21).

7. A foundation pit support device according to claim 3, characterized in that: The second stabilizing member comprises a second plug-in rod (25), and the second plug-in rod (25) is slidably connected to the connecting block (4).

8. A foundation pit support device according to claim 3, characterized in that: One of the two bottom plates (1011) on two adjacent supporting frames (1) is a single-layer structure, and the other bottom plate (1011) is a double-layer structure, and the bottom plate (1011) of the single-layer structure is located between the double-layer structures.

9. A foundation pit support device according to claim 5, characterized in that: The cross-sections of the first slide groove (102), the second slide groove (1013), the third slide groove (12) and the fourth slide groove (14) are all T-shaped.

10. A method for using a foundation pit support device, applicable to the foundation pit support device according to claim 1, characterized in that: The following steps are involved: The four support frames (1) are assembled into a support frame and placed at the bottom of the foundation pit (2); A limiting connection between two adjacent supporting frames (1) is achieved through a connecting piece; The first stabilizing member is installed on the supporting frame (1) and extended into the soil layer to achieve the connection between the supporting frame (1) and the foundation pit (2); The second stabilizing member is installed on the connecting member and extends through the second stabilizing member into the soil layer of the foundation pit (2); The side support plate (3) is installed on the support frame (1), and is installed on the support frame (1) through a support member, so as to support the foundation pit (2).

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