A steel formwork for foundation pit support in construction engineering

Abstract

The present invention discloses a steel formwork for supporting a foundation pit of a construction project, and relates to the field of foundation pit protection, including a concrete block, wherein side grooves are respectively arranged around the upper end of the concrete block, a mounting base mechanism is fixedly connected to the inner wall of the side groove, a lifting mechanism is fixedly connected to the upper side of the mounting base mechanism, and a flipping steel plate mechanism is fixedly connected to one side of the lifting mechanism. The present invention gradually unfolds the folded side block group after being subjected to force by a telescopic scissor-type frame, and two second hydraulic cylinders push the horizontal side block group to fit the inner wall of the foundation pit to achieve support for the inner wall, and two sets of telescopic multi-stage arms respectively increase horizontal stress on the back of the first and second square plates to improve the structural strength of the horizontal side block group after unfolding, and the number of the steel formworks is reasonably planned according to the length of the inner wall of the foundation pit, and each steel formwork can be quickly unfolded and retracted without a lot of time and effort, and is easy to install and disassemble, greatly shortening the disassembly cycle.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit protection, in particular to a steel template for supporting a foundation pit in a construction project. Background Art

[0002] The foundation pit is a pit dug 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. If the excavation is not deep, the side slope can be used to stabilize the soil slope, and the slope size is determined according to relevant construction regulations. If the excavation is deep or there are buildings nearby, the foundation pit wall support method can be used to prevent the outer soil layer from collapsing. The foundation pit support is a support, reinforcement and protection measure for the side walls of the foundation pit and the surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit.

[0003] For example, Chinese patent CN112962623A discloses a steel formwork for supporting a foundation pit of a construction project, comprising rectangular steel frames symmetrically arranged front and back, support mechanisms being arranged on the outer sides of two groups of rectangular steel frames, and a support mechanism being arranged on the outer side of a No. 1 concave steel frame.

[0004] However, in the prior art, the steel formwork used for foundation pit support is generally constructed on-site using steel pipes and steel plates, supported on the pit wall to prevent soil collapse, and the construction between the steel pipes and steel plates requires many connectors, resulting in a long construction period and troublesome disassembly at a later stage. When the disassembled steel pipes and steel plates are used again, they need to be rebuilt, which is very inconvenient to use. Summary of the invention

[0005] The purpose of the present invention is to provide a steel formwork for foundation pit support of a construction project, so as to solve the problem that the steel formwork used for foundation pit support proposed in the above-mentioned background technology is generally built on-site using steel pipes and steel plates, supported on the pit wall to prevent soil collapse, and the construction between the steel pipes and steel plates requires many connecting parts, resulting in a long construction period and troublesome disassembly at a later stage. When the disassembled steel pipes and steel plates are used again, they need to be rebuilt, which is very inconvenient to use.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a steel formwork for foundation pit support of a construction project, comprising a concrete block, wherein side grooves are respectively arranged around the upper end of the concrete block, a mounting base mechanism is fixedly connected to the inner wall of the side groove, a lifting mechanism is fixedly connected to the upper side of the mounting base mechanism, and a flip steel plate mechanism is fixedly connected to one side of the lifting mechanism;

[0007] The lifting mechanism comprises a moving frame, both ends of the upper and lower sides of the moving frame are respectively fixedly connected with side wheel assemblies, and the middle part of the side wheel assembly is rollingly clamped with a T-shaped track;

[0008] A connecting plate is fixedly connected to one side of the mobile frame, two groups of second hydraulic cylinders are fixedly installed on one side of the connecting plate, and the movable rods of the two groups of second hydraulic cylinders are rotatably connected to the center plate, and a number of telescopic multi-stage arms are fixedly connected to both sides of the center plate, one of the telescopic multi-stage arms is rotatably connected to the first square plate, and another of the telescopic multi-stage arms is rotatably connected to the second square plate, and a lower end of each of the first square plates and an upper end of the second square plate are fixedly connected to a steel connecting column, adjacent first square plates are rotatably connected, and adjacent second square plates are rotatably connected, and the outer surface of the outermost steel connecting column of the telescopic multi-stage arm is rotatably connected to a telescopic scissors-type frame, and the middle part of the telescopic scissors-type frame is rotatably connected to an electric cylinder, and the other end of the electric cylinder is rotatably connected to one side of the center plate.

[0009] Preferably, the side wheel assembly comprises an arc-shaped plate, the upper side of the arc-shaped plate is rotatably connected to a plurality of triangular double-layer frames, and the upper end of each triangular double-layer frame is rotatably connected to a disc.

[0010] Preferably, a long bolt is threadedly connected to the lower end of each triangular double-layer frame, and a spring is sleeved on the outer surface of each long bolt.

[0011] Preferably, the spring is located on the outside of the triangular double-layer frame, and the spring is located on the inner side of the protrusion of the arc plate, and one side of each of the arc plates is fixedly connected to one side of the moving frame.

[0012] Preferably, the upper end of the movable frame is rotatably connected to a first hydraulic cylinder, and the lower side of the first hydraulic cylinder is fixedly connected to a bottom plate.

[0013] Preferably, a support plate frame is fixedly connected to the upper side of the base plate, and the T-shaped track is located on one side of the support plate frame.

[0014] Preferably, the lower side of the T-shaped track is fixedly connected to the upper side of the base plate, and a plurality of side connecting plates are fixedly connected between the support plate frame and the T-shaped track.

[0015] Preferably, a V-shaped frame is fixedly connected to the lower side of the base plate, a square frame is fixedly connected to the lower side of the V-shaped frame, and two groups of third hydraulic cylinders are fixedly installed between the square frame and the V-shaped frame.

[0016] Preferably, the two groups of the third hydraulic cylinders are installed back to back, and the movable rod of each of the third hydraulic cylinders is fixedly clamped with a first side clamp, one side of each of the first side clamps is fixedly connected with two groups of smooth rods, one side of each of the first side clamps is fixedly connected with a first side tooth column, the outer surface of the first side tooth column and the outer surface of the smooth rod are slidably clamped with a built-in shelf, and the outer side of the built-in shelf is fixedly connected to the inner wall of the square frame.

[0017] Preferably, a central gear is rotatably connected to the middle of the square frame, and the outer sides of the central gear are respectively meshed with the two groups of the first side tooth columns, and a meshing assembly is provided at the lower end of the built-in shelf, and the outer sides of both ends of the meshing assembly are fixedly connected with second side clamps.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, by setting a flip steel plate mechanism, the movable rod of the electric cylinder extends outward to push the middle position of the telescopic scissor frame. The telescopic scissor frame gradually unfolds after being subjected to force. Each first square plate, the steel connecting column and the second square plate form a side block. Initially, each side block is folded together. After the telescopic scissor frame is subjected to force and unfolded, the head and tail push a steel connecting column respectively, so that the folded side block group gradually unfolds until it is in a horizontal state. After the side block is unfolded, the first square plate and the second square plate drive the telescopic multi-stage arm to extend step by step. After the side block is unfolded, the movable rods of the two second hydraulic cylinders extend to push the horizontal side block group to fit the inner wall of the foundation pit to achieve support for the inner wall. The two groups of telescopic multi-stage arms increase horizontal stress on the backs of the first square plate and the second square plate respectively, thereby improving the structural strength of the horizontal side block group after unfolding and increasing the stability of the support. The number of the steel templates is reasonably planned according to the length of the inner wall of the foundation pit. Each steel template can be unfolded and retracted quickly without a lot of time and energy. It is easy to install and disassemble, and the disassembly cycle is greatly shortened.

[0020] 2. In the present invention, a mounting base mechanism is provided to cast concrete blocks in the edge area of ​​the foundation pit, four sets of side grooves are opened around the concrete blocks, and the steel template is moved to the upper side of the concrete block by means of a crane. Then, two sets of third hydraulic cylinders are started synchronously. Since the two sets of third hydraulic cylinders are installed in opposite directions, the movable rods of the two sets of third hydraulic cylinders are retracted toward the middle, respectively pulling the corresponding first side clamping plates. The first side clamping plates are subjected to force and simultaneously push a first side tooth column and two smooth rods to slide on the inner upper end of the built-in layer frame, and the first side tooth columns on both sides slide toward the middle of the built-in layer frame, and the meshing center gear rotates clockwise in the inner cavity of the square frame. While the center gear rotates, it drives the meshing assembly of the same structure at the lower end of the built-in layer frame to operate, and drives the two second side clamping plates to move toward the middle as well. The two first side clamping plates form a clamping group, and the two second side clamping plates form another clamping group. The two clamping groups are respectively embedded in the side grooves, so that the steel template is installed at the edge of the foundation pit.

[0021] 3. In the present invention, a lifting mechanism is set up, the first hydraulic cylinder is started, the movable rod of the first hydraulic cylinder is extended, and the moving frame is pushed. The moving frame drives the arc plates at the four corners. Each arc plate pushes three groups of triangular double-layer frames. The triangular double-layer frames are limited by springs and long bolts. The three groups of triangular double-layer frames are forced to drive the discs to be close to the middle and fit the outer side of the T-track. The support plate frame, multiple side connecting plates and two T-tracks form a track frame. The moving frame is forced to slide upward in the middle of the track frame, thereby driving the flipping steel plate mechanism upward, adjusting the height of the flipping steel plate mechanism, and increasing the support range on the inner wall of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a steel formwork for supporting a foundation pit of a construction project according to the present invention;

[0023] Figure 2 It is a schematic diagram of the exploded three-dimensional structure of a steel template for supporting a foundation pit of a construction project according to the present invention;

[0024] Figure 3 It is a schematic diagram of the exploded three-dimensional structure of a lifting mechanism in a steel formwork for supporting a foundation pit of a construction project according to the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of a side wheel assembly in a steel formwork for supporting a foundation pit of a construction project according to the present invention;

[0026] Figure 5 It is a three-dimensional structural schematic diagram of a steel plate flipping mechanism in a steel template for supporting a foundation pit of a construction project according to the present invention;

[0027] Figure 6 It is a schematic diagram of a partially unfolded three-dimensional structure of a turning steel plate mechanism in a foundation pit supporting steel formwork of a construction project according to the present invention;

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure inside the installation base mechanism in a steel formwork for supporting a foundation pit of a construction project according to the present invention;

[0029] Figure 8 The present invention is a schematic diagram of a three-dimensional structure of a part of an installation base mechanism in a steel formwork for supporting a foundation pit of a construction project.

[0030] In the figure: 1, concrete block; 2, mounting base mechanism; 21, yoke; 22, third hydraulic cylinder; 23, first side clamping plate; 24, square frame; 25, first side tooth column; 26, smooth rod; 27, built-in shelf; 28, central gear; 29, second side clamping plate; 210, meshing assembly; 3, lifting mechanism; 31, support plate frame; 32, side connecting plate; 33, T-shaped track; 34, bottom plate; 35, moving Frame; 36, first hydraulic cylinder; 37, side wheel assembly; 371, arc plate; 372, spring; 373, long bolt; 374, disc; 375, triangular double-layer frame; 4, flip steel plate mechanism; 41, connecting plate; 42, second hydraulic cylinder; 43, center plate; 44, telescopic multi-stage arm; 45, first square plate; 46, second square plate; 47, electric cylinder; 48, telescopic scissors frame; 49, steel connecting column; 5, side groove. DETAILED DESCRIPTION

[0031] 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 implementation regulations described 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.

[0032] Embodiment 1

[0033] Reference Figure 1-8 As shown: a steel formwork for foundation pit support of a construction project, comprising a concrete block 1, side grooves 5 are arranged around the upper end of the concrete block 1, a mounting base mechanism 2 is fixedly connected to the inner wall of the side groove 5, a lifting mechanism 3 is fixedly connected to the upper side of the mounting base mechanism 2, a flip steel plate mechanism 4 is fixedly connected to one side of the lifting mechanism 3, the lifting mechanism 3 comprises a moving frame 35, both ends of the upper and lower sides of the moving frame 35 are fixedly connected to side wheel assemblies 37, a T-shaped track 33 is rollingly connected to the middle part of the side wheel assembly 37, a connecting plate 41 is fixedly connected to one side of the connecting plate 41, two sets of second hydraulic cylinders 42 are fixedly installed on one side of the connecting plate 41, and the movable rods of the two sets of second hydraulic cylinders 42 are rotatably connected to the movable rods of the two sets of second hydraulic cylinders 42. A center plate 43 is connected, and a plurality of telescopic multi-stage arms 44 are fixedly connected on both sides of the center plate 43, wherein a first square plate 45 is rotatably connected to one of the telescopic multi-stage arms 44, and a second square plate 46 is rotatably connected to another telescopic multi-stage arm 44, and a steel connecting column 49 is fixedly connected to the lower end of each first square plate 45 and the upper end of the second square plate 46, and adjacent first square plates 45 are rotatably connected, and adjacent second square plates 46 are rotatably connected, and the outer surface of the outermost steel connecting column 49 located on the telescopic multi-stage arm 44 is rotatably connected to a telescopic scissor-type frame 48, and the middle part of the telescopic scissor-type frame 48 is rotatably connected to an electric cylinder 47, and the other end of the electric cylinder 47 is rotatably connected to one side of the center plate 43.

[0034] In this embodiment, by setting the flip steel plate mechanism 4, the movable rod of the electric cylinder 47 extends outward to push the middle position of the telescopic scissor frame 48. The telescopic scissor frame 48 is gradually unfolded after being subjected to force. Each first square plate 45, the steel connecting column 49 and the second square plate 46 form a side block. Initially, each side block is folded together. After the telescopic scissor frame 48 is subjected to force and unfolded, the front and rear pushes a steel connecting column 49 respectively, so that the folded side block group is gradually unfolded until it is in a horizontal state. After the side block is unfolded, the first square plate 45 and the second square plate 46 are brought The telescopic multi-stage arm 44 is extended step by step. After the side guard is unfolded, the movable rods of the two second hydraulic cylinders 42 are extended to push the horizontal side guard group to fit the inner wall of the foundation pit to support the inner wall. The two sets of telescopic multi-stage arms 44 increase horizontal stress on the back of the first square plate 45 and the second square plate 46 respectively, so as to improve the structural strength of the horizontal side guard group after unfolding and increase the stability of the support. The number of the steel templates is reasonably planned according to the length of the inner wall of the foundation pit. Each steel template can be unfolded and retracted quickly without much time and effort. It is easy to install and disassemble, which greatly shortens the disassembly cycle.

[0035] Embodiment 2

[0036] according to Figure 1-4 As shown, a steel formwork for supporting a foundation pit of a construction project comprises a concrete block 1, side grooves 5 are arranged around the upper end of the concrete block 1, a mounting base mechanism 2 is fixedly connected to the inner wall of the side groove 5, a lifting mechanism 3 is fixedly connected to the upper side of the mounting base mechanism 2, a flip steel plate mechanism 4 is fixedly connected to one side of the lifting mechanism 3, the lifting mechanism 3 comprises a moving frame 35, and side wheel assemblies 37 are fixedly connected to the upper and lower ends of the moving frame 35, the side wheel assembly 37 comprises an arc plate 371, and a plurality of triangular double-layer frames 375 are rotatably connected to the upper side of the arc plate 371, and a disc 374 is rotatably connected to the upper end of each triangular double-layer frame 375, and a threaded connection is formed at the lower end of each triangular double-layer frame 375. It is connected with long bolts 373, and the outer surface of each long bolt 373 is sleeved with a spring 372, the spring 372 is located on the outside of the triangular double-layer frame 375, and the spring 372 is located on the inner side of the protrusion of the arc plate 371, one side of each arc plate 371 is fixedly connected to one side of the mobile frame 35, the upper end of the mobile frame 35 is rotatably connected to the first hydraulic cylinder 36, the lower side of the first hydraulic cylinder 36 is fixedly connected to the bottom plate 34, the upper side of the bottom plate 34 is fixedly connected to the support plate frame 31, the T-shaped track 33 is located on one side of the support plate frame 31, the lower side of the T-shaped track 33 is fixedly connected to the upper side of the bottom plate 34, and a number of side connecting plates 32 are fixedly connected between the support plate frame 31 and the T-shaped track 33.

[0037] In this embodiment, by setting up the lifting mechanism 3, the first hydraulic cylinder 36 is started. The movable rod of the first hydraulic cylinder 36 extends, pushing the moving frame 35. The moving frame 35 drives the arc-shaped plates 371 at the four corners. Each arc-shaped plate 371 pushes the three groups of triangular double-layer frames 375. Under the fastening and limiting of the springs 372 and the long bolts 373, the three groups of triangular double-layer frames 375 are stressed to drive the disc 374 to closely approach the middle and fit against the outer side of the T-shaped track 33. The support plate frame 31, the multiple side connecting plates 32 and the two T-shaped tracks 33 form a track framework. The moving frame 35 is stressed to slide upward in the middle of the track framework, thereby driving the flipping steel plate mechanism 4 upward to adjust the height of the flipping steel plate mechanism 4 and increase the support range on the inner wall of the foundation pit.

[0038] Embodiment III

[0039] According to Figure 1 、 Figure 2 、 Figure 3 、 Figure 7 and Figure 8 As shown, a C-shaped frame 21 is fixedly connected to the lower side of the bottom plate 34. A square frame 24 is fixedly connected to the lower side of the C-shaped frame 21. Two groups of third hydraulic cylinders 22 are fixedly installed between the square frame 24 and the C-shaped frame 21. The two groups of third hydraulic cylinders 22 are installed in opposite directions. The movable rod of each third hydraulic cylinder 22 is fixedly clamped with a first side clamping plate 23. Two groups of smooth rods 26 are fixedly connected to one side of each first side clamping plate 23. A first side tooth column 25 is fixedly connected to one side of each first side clamping plate 23. An inner layer frame 27 is slidably clamped on the outer surface of the first side tooth column 25 and the outer surface of the smooth rod 26. The outer side of the inner layer frame 27 is fixedly connected to the inner wall of the square frame 24. A central gear 28 is rotatably connected to the middle of the square frame 24. The outer side of the central gear 28 is meshed with the two groups of first side tooth columns 25 respectively. A meshing component 210 is arranged at the lower end of the inner layer frame 27. Two second side clamping plates 29 are fixedly connected to the outer sides of both ends of the meshing component 210.

[0040] In this embodiment, by setting up the mounting base mechanism 2, the concrete block 1 is poured in the edge area of ​​the foundation pit, four sets of side grooves 5 are opened around the concrete block 1, and the steel template is moved to the upper side of the concrete block 1 by means of a crane. Then, the two sets of third hydraulic cylinders 22 are synchronously started. Since the two sets of third hydraulic cylinders 22 are installed in opposite directions, the movable rods of the two sets of third hydraulic cylinders 22 are retracted toward the middle, respectively pulling the corresponding first side clamping plates 23. The first side clamping plates 23 are subjected to force and simultaneously push a first side tooth column 25 and two smooth rods 26 to the built-in layer frame 27. The upper end of the interior slides, and the first side tooth columns 25 on both sides slide toward the middle of the built-in shelf 27. The meshing center gear 28 rotates clockwise in the inner cavity of the square frame 24. While the center gear 28 rotates, it drives the meshing component 210 of the same structure at the lower end of the built-in shelf 27 to operate, and drives the two second side clamps 29 to move toward the middle. The two first side clamps 23 form a clamping group, and the two second side clamps 29 form another clamping group. The two clamping groups are respectively embedded in the side grooves 5, so that the steel template is installed at the edge of the foundation pit.

[0041] The use method and working principle of the device: When using the steel formwork for supporting the foundation pit of a construction project, firstly, a concrete block 1 is poured in the edge area of ​​the foundation pit, four sets of side grooves 5 are opened around the concrete block 1, and the steel formwork is moved to the upper side of the concrete block 1 by means of a crane;

[0042] Next, the two groups of third hydraulic cylinders 22 are started synchronously. Since the two groups of third hydraulic cylinders 22 are installed in opposite directions, the movable rods of the two groups of third hydraulic cylinders 22 shrink toward the middle, pulling the corresponding first side clamps 23 respectively. The first side clamps 23 are forced to push a first side tooth column 25 and two smooth rods 26 to slide on the inner upper end of the built-in layer frame 27 at the same time. The first side tooth columns 25 on both sides slide toward the middle of the built-in layer frame 27, and the meshing center gear 28 rotates clockwise in the inner cavity of the square frame 24. While the center gear 28 rotates, it drives the meshing assembly 210 of the same structure at the lower end of the built-in layer frame 27 to operate, driving the two second side clamps 29 to move toward the middle as well. The two first side clamps 23 form a clamping group, and the two second side clamps 29 form another clamping group. The two clamping groups are respectively embedded in the side grooves 5, so that the steel template is installed at the edge of the foundation pit.

[0043] Then, the first hydraulic cylinder 36 is started, and the movable rod of the first hydraulic cylinder 36 is extended to push the moving frame 35, and the moving frame 35 drives the arc plates 371 at the four corners, and each arc plate 371 pushes three sets of triangular double-layer frames 375, and the triangular double-layer frames 375 are tightened and limited by the springs 372 and the long bolts 373. The three sets of triangular double-layer frames 375 are forced to drive the disc 374 to be close to the middle part and fit the outer side of the T-shaped track 33. The support plate frame 31, multiple side connecting plates 32 and two T-shaped tracks 33 form a track frame. The moving frame 35 is forced to slide upward in the middle of the track frame, thereby driving the flipping steel plate mechanism 4 upward, adjusting the height of the flipping steel plate mechanism 4, and increasing the support range on the inner wall of the foundation pit;

[0044] Next, the electric cylinder 47 is started, and the movable rod of the electric cylinder 47 extends outward, pushing the middle position of the telescopic scissor frame 48. The telescopic scissor frame 48 is gradually unfolded after being stressed, and each first square plate 45, steel connecting column 49 and second square plate 46 form a side block. Initially, each side block is folded together. After the telescopic scissor frame 48 is unfolded under stress, the head and tail push a steel connecting column 49 respectively, so that the folded side block group is gradually unfolded until it is horizontal. After the side block is unfolded, the first square plate 45 and the second square plate 46 drive the telescopic multi-stage arm 44 to extend step by step. After the side block is unfolded, the movable rods of the two second hydraulic cylinders 42 are extended to push the horizontal side block group to fit the inner wall of the foundation pit to support the inner wall. The two groups of telescopic multi-stage arms 44 increase horizontal stress on the back of the first square plate 45 and the second square plate 46 respectively, so as to improve the structural strength of the horizontal side block group after unfolding and increase the stability of the support.

[0045] The number of steel formworks is rationally planned according to the length of the inner wall of the foundation pit. Each steel formwork can be expanded and contracted quickly, does not require a lot of time and effort, is easy to install and disassemble, and greatly shortens the assembly and disassembly cycle.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel formwork for supporting a foundation pit in a construction project, comprising a concrete block, characterized in that: Side grooves are respectively arranged around the upper end of the concrete block, an installation base mechanism is fixedly clamped on the inner wall of the side groove, a lifting mechanism is fixedly connected to the upper side of the installation base mechanism, and a flipping steel plate mechanism is fixedly connected to one side of the lifting mechanism; The lifting mechanism includes a moving frame, side wheel assemblies are respectively fixedly connected to both ends of the upper and lower sides of the moving frame, a T-shaped track is rollingly clamped in the middle of the side wheel assemblies, a first hydraulic cylinder is rotatably connected to the upper end of the moving frame, a bottom plate is fixedly connected to the lower side of the first hydraulic cylinder, a support plate frame is fixedly connected to the upper side of the bottom plate, and the T-shaped track is located on one side of the support plate frame; A connecting plate is fixedly connected to one side of the moving frame, two groups of second hydraulic cylinders are fixedly installed on one side of the connecting plate, the movable rods of the two groups of second hydraulic cylinders are rotatably connected to a central plate, a plurality of telescopic multi-stage arms are fixedly connected to both sides of the central plate, a first square plate is rotatably connected to one of the telescopic multi-stage arms, a second square plate is rotatably connected to the other telescopic multi-stage arm, a steel connecting column is fixedly connected to the lower end of each first square plate and the upper end of each second square plate, adjacent first square plates are rotatably connected, adjacent second square plates are rotatably connected, a telescopic scissor frame is rotatably connected to the outer surface of the steel connecting column located on the outermost side of the telescopic multi-stage arm, an electric cylinder is rotatably connected to the middle of the telescopic scissor frame, and the other end of the electric cylinder is rotatably connected to one side of the central plate.

2. A construction engineering foundation pit support steel formwork according to claim 1, characterized in that: The side wheel assembly includes an arc-shaped plate, a plurality of triangular double-layer frames are rotatably connected to the upper side of the arc-shaped plate, and a disc is rotatably connected to the upper end of each triangular double-layer frame.

3. A construction engineering foundation pit support steel formwork according to claim 2, characterized in that: A long bolt is threadedly connected to the lower end of each triangular double-layer frame, and a spring is sleeved on the outer surface of each long bolt.

4. A construction engineering foundation pit support steel formwork according to claim 3, characterized in that: The spring is located outside the triangular double-layer frame, and the spring is located inside the protrusion of the arc-shaped plate. One side of each arc-shaped plate is fixedly connected to one side of the moving frame.

5. A construction engineering foundation pit support steel formwork according to claim 4, characterized in that: The lower side of the T-shaped track is fixedly connected to the upper side of the bottom plate, and a plurality of side connecting plates are fixedly connected between the support plate frame and the T-shaped track.

6. A construction engineering foundation pit support steel formwork according to claim 5, characterized in that: A U-shaped frame is fixedly connected to the lower side of the bottom plate, a square frame is fixedly connected to the lower side of the U-shaped frame, and two groups of third hydraulic cylinders are fixedly installed between the square frame and the U-shaped frame.

7. A construction engineering foundation pit support steel formwork according to claim 6, characterized in that: The two groups of third hydraulic cylinders are installed back to back, a first side clamping plate is fixedly clamped on the movable rod of each third hydraulic cylinder, two smooth rods are fixedly connected to one side of each first side clamping plate, a first side tooth column is fixedly connected to one side of each first side clamping plate, an inner layer frame is slidably clamped on the outer surface of the first side tooth column and the outer surface of the smooth rod, and the outer side of the inner layer frame is fixedly connected to the inner wall of the square frame.

8. A construction engineering foundation pit support steel formwork according to claim 7, characterized in that: A central gear is rotatably connected to the middle of the square frame, the outer side of the central gear is respectively meshed with the two groups of first side tooth columns, a meshing component is arranged at the lower end of the inner layer frame, and second side clamping plates are fixedly connected to both ends of the meshing component.

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