A foundation pit support structure

Abstract

This application relates to the technical field of foundation pit support, and in particular to a foundation pit support structure, which includes several support units. Each support unit includes an arc-shaped support plate, a first fan blade installed on the outer wall of the support plate, and at least one arc-shaped rod installed on the inner wall of the support plate. One side of the support plate has a through-slot for the arc-shaped rods on adjacent support plates to rotate and pass through. The through-slots correspond one-to-one with the arc-shaped rods. The horizontal distance between the arc-shaped rods and the inner wall of the support plate gradually increases from one side of the support plate to the other side. A receiving cavity is provided on the inner side of the support plate. When the support plate rotates on the arc-shaped rods, so that all support plates are coaxially aligned, all support plates will be circumferentially aligned, and the opposite sides of every two adjacent support plates will be spaced apart. A fixing unit is installed on the top of the support plate, located on the side with the larger horizontal distance between the arc-shaped rods and the inner wall of the support plate. This application can improve the support efficiency of foundation pits.

Description

Technical Field

[0001] This application relates to the technical field of foundation pit support, and in particular to a foundation pit support structure. Background Technology

[0002] An excavation pit is a pit dug at the foundation design location according to the base elevation and foundation plane dimensions. The excavation pit support structure can be used to support the excavation pit, prevent the excavation pit from collapsing, and play a role in safety protection.

[0003] A search revealed Chinese Patent Publication No. CN212427111U, which discloses a truss-type foundation pit support structure for building construction. This structure relates to the field of foundation pit support structures and includes foundation pit support plates. The support plates are in the shape of a quarter-cylinder and consist of several groups. These groups are spliced ​​together to form a cylindrical structure, and then joined vertically. An interlocking spiral structure is fixedly welded to the outer ring of the support plates. In this invention, the foundation pit support plates can be spliced ​​together one level at a time during foundation pit construction, preventing collapse during construction and demonstrating strong practicality. Furthermore, the upper part of the support plates is tightened and fixed by tension rods and tension plates, achieving stable support against the inner wall of the foundation pit, replacing the method of fixing from the bottom inside the pit and not affecting construction inside the pit. The interlocking spiral structure on the outside of the support plates ensures good interlocking and fixation with the inner wall of the pit, resulting in a stable overall structure.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: Before supporting the foundation pit, workers need to first place the four sets of foundation pit support plates that are separate from each other, then arrange the four sets of foundation pit support plates neatly according to the height of the interlocking screw mechanism, then align the edges of the four sets of foundation pit support plates, and then splice the four sets of foundation pit support plates together into a cylindrical shape. Finally, the four sets of foundation pit support plates that have been spliced ​​together can be spirally embedded downwards into the foundation pit. The above-mentioned foundation pit support steps are relatively cumbersome and inefficient, and therefore need to be improved. Summary of the Invention

[0005] In order to improve the support efficiency of foundation pits, this application provides a foundation pit support structure.

[0006] This application provides a foundation pit support structure, which adopts the following technical solution: A foundation pit support structure includes several support units. Each support unit includes an arc-shaped support plate, a first fan blade installed on the outer wall of the support plate, and at least one arc-shaped rod installed on the inner wall of the support plate. One side of the support plate is provided with a through groove for the arc-shaped rods on adjacent support plates to rotate through. The through grooves correspond one-to-one with the arc-shaped rods. The horizontal distance between the arc-shaped rods and the inner wall of the support plate gradually increases from one side of the support plate to the other side. The inner side of the support plate is provided with a storage cavity for adjacent support units to rotate and be embedded in.

[0007] When the support plate rotates on the arc-shaped rod, so that all the support plates are set on the same axis, all the support plates will be set in a circumferential manner, and the opposite sides of every two adjacent support plates will be spaced apart.

[0008] The top of the support plate is equipped with a fixing unit for fixing to the ground. The fixing unit is located on the side with the larger horizontal distance between the arc rod and the inner wall of the support plate.

[0009] Optionally, both sides of the support plate are provided with grooves that penetrate the outer wall of the support plate. One of the grooves is provided with an arc-shaped plate that flips on the horizontal plane. One end of the arc-shaped plate is rotatably connected to the groove wall of the groove, and the other end of the arc-shaped plate is used to rotatably engage with the grooves on the adjacent support plates, so that all support units are spliced ​​together into a cylindrical shape.

[0010] Optionally, the groove for the rotatable connection of the arc plate is provided with a torsion spring for causing the arc plate to engage with the groove on the adjacent support plate, and the two ends of the torsion spring are respectively connected to the arc plate and the support plate.

[0011] Optionally, at least one elastic cylinder is installed on the groove wall of the groove for the rotatable locking of the arc plate. The arc plate is provided with a locking groove for the rotatable locking of the elastic cylinder, and the locking groove corresponds one-to-one with the elastic cylinder. When all support units are spliced ​​together into a cylindrical shape, the elastic cylinder can be rotatably locked in the locking groove.

[0012] Optionally, the inner wall of the support plate is provided with a through hole corresponding to the inner side of the elastic cylinder, and the same horizontal pin is inserted through the corresponding through hole and the elastic cylinder.

[0013] Optionally, a second fan blade is installed on the outer wall of the arc-shaped plate. When all support units are spliced ​​together into a cylindrical shape, all the first fan blades and all the second fan blades will together form a complete spiral blade.

[0014] Optionally, an annular groove is provided at the end where the horizontal distance between the arc-shaped rod and the inner wall of the support plate is larger, and a friction sleeve is embedded in the annular groove. The friction sleeve is used to securely embed in the through groove.

[0015] Optionally, the fixing unit includes a mounting plate installed on the top of the support plate, and a plurality of vertical pins are slidably inserted through the mounting plate in the vertical direction.

[0016] In summary, this application includes the following beneficial technical effects:

[0017] 1. By sliding the support plate on the arc-shaped rod, the worker can make the support unit slide into the storage cavity of the adjacent support unit; by sliding the three sets of support units in sequence, the worker can make all three sets of support units stored in the storage cavity of the outer support unit, which facilitates the storage and transportation of the support structure.

[0018] 2. When workers slide the support unit in the reverse direction so that all support plates are set in a coaxial direction, all support plates will be set in a circumferential direction, and the opposite sides of every two adjacent support plates will be spaced apart. At this time, all support plates will form a cylindrical structure with four fractures, realizing the rapid splicing of the support structure and improving the support efficiency of the foundation pit.

[0019] 3. When all three support units are housed in the housing cavity of the outer support unit, the friction sleeve in the housing cavity will be tightly embedded in the through groove of the support plate located in the housing cavity. The friction between the outer wall of the friction sleeve and the wall of the through groove will make it difficult for two adjacent support plates to separate from each other, thereby improving the stability of the support unit when it is housed.

[0020] 4. When all support units are spliced ​​together to form a cylindrical structure with four fracture openings, the arc plate will be located between two adjacent support plates. At this time, the arc plate on the support plate can be rotated and locked into the groove on the adjacent support plate, so that the fracture openings of the cylindrical structure are closed. Therefore, all support units are spliced ​​together to form a complete cylindrical shape so that the support structure can provide stable support for the side of the foundation pit.

[0021] 5. When all support units are assembled into a cylindrical shape, the torsion spring will cause the arc plate to rotate and reset. The arc plate will rotate into the corresponding groove, so that the elastic cylinder rotates and engages in the engagement groove. The arc plate will connect two adjacent support plates into one, so that all support units form a whole under stress, thereby improving the stability of the support structure. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the support structure in use in the embodiments of this application;

[0023] Figure 2 This is a top view of the support structure in the embodiments of this application;

[0024] Figure 3 This is a schematic diagram of the structure inside the support unit in the embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the structure on the outside of the support unit in the embodiments of this application;

[0026] Figure 5 This is a schematic diagram of the inner structure of the support structure in the stowed state in the embodiments of this application;

[0027] Figure 6 This is a schematic diagram of the outer structure of the support structure in the stored state in the embodiment of this application.

[0028] Reference numerals: 1. Support unit; 11. Support plate; 111. First blade; 112. Through slot; 113. Groove; 114. Elastic cylinder; 115. Through hole; 116. Horizontal pin; 12. Arc rod; 121. Connecting rod; 122. Annular groove; 123. Friction sleeve; 13. Receiving cavity; 14. Arc plate; 141. Torsion spring; 142. Second blade; 143. Snap-fit ​​groove; 2. Fixing unit; 21. Mounting plate; 22. Vertical pin. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0030] This application discloses a foundation pit support structure. For example... Figure 1 and Figure 2 As shown, a foundation pit support structure includes several support units 1. In this embodiment, the number of support units 1 is four sets. The support unit 1 includes an arc-shaped support plate 11. A first fan blade 111 is installed on the outer wall of the support plate 11. At least one arc-shaped rod 12 is connected to the inner wall of the support plate 11 by a connecting rod 121. In this embodiment, the number of arc-shaped rods 12 is two and they are arranged at vertical intervals.

[0031] The support plate 11 has two through slots 112 on one side, and the through slots 112 correspond one-to-one with the arc rods 12. The arc rods 12 on the support plate 11 can rotate and pass through the through slots 112 on the adjacent support plates 11, realizing the sliding connection of the two adjacent support plates 11.

[0032] The horizontal distance between the arc-shaped rod 12 and the inner wall of the support plate 11 gradually increases from one side of the support plate 11 to the other side, and the inner side of the support plate 11 is provided with a storage cavity 13.

[0033] like Figure 5 and Figure 6 As shown, by sliding the support plate 11 on the arc-shaped rod 12, the worker can make the support unit 1 slide into the storage cavity 13 of the adjacent support unit 1; by sliding the three sets of support units 1 in sequence, the worker can make all three sets of support units 1 be stored in the storage cavity 13 of the outer support unit 1, which facilitates the storage and transportation of the support structure.

[0034] like Figure 1 and Figure 2 As shown, when the worker slides the support unit 1 in the opposite direction so that all the support plates 11 are arranged coaxially, all the support plates 11 will be arranged circumferentially, and the opposite sides of every two adjacent support plates 11 will be spaced apart. At this time, all the support plates 11 will form a cylindrical structure with four fractures, realizing the rapid splicing of the support structure and improving the support efficiency of the foundation pit.

[0035] A fixing unit 2 is installed on the top of the support plate 11. The fixing unit 2 includes a mounting plate 21 installed on the top of the support plate 11. Several vertical pins 22 are slidably inserted through the mounting plate 21 in the vertical direction. When the support plate 11 is embedded into the foundation pit, the lower surface of the mounting plate 21 will be in contact with the ground, and the vertical pins 22 will be inserted into the ground and press the mounting plate 21 firmly onto the ground, thereby improving the stability of the support structure.

[0036] like Figure 5 and Figure 6 As shown, it is worth noting that the fixing unit 2 and the connecting rod 121 are both located on the side with a larger horizontal distance between the arc rod 12 and the inner wall of the support plate 11. Therefore, when all three sets of support units 1 are housed in the housing cavity 13 of the outer support unit 1, the four sets of fixing units 2 will be arranged in an arc shape, so that the fixing unit 2 will not easily affect the housing of the support unit 1.

[0037] like Figures 3 to 5 As shown, an annular groove 122 is provided at the end with the larger horizontal distance between the arc-shaped rod 12 and the inner wall of the support plate 11, and a friction sleeve 123 is tightly embedded in the annular groove 122. When all three sets of support units 1 are housed in the housing cavity 13 of the outer support unit 1, the friction sleeve 123 in the housing cavity 13 will be tightly embedded in the through groove 112 on the support plate 11 located in the housing cavity 13. The friction between the outer wall of the friction sleeve 123 and the groove wall of the through groove 112 will make it difficult for two adjacent support plates 11 to separate from each other, thereby improving the stability of the support unit 1 when it is housed.

[0038] like Figures 2 to 4 As shown, both sides of the support plate 11 are provided with grooves 113 penetrating the outer wall of the support plate 11. The grooves 113 extend vertically, and one of the grooves 113 contains an arc-shaped plate 14 that flips on the horizontal plane. One end of the arc-shaped plate 14 is rotatably connected to the groove wall of the groove 113. When all the support units 1 are spliced ​​together to form a cylindrical structure with four fracture openings, the arc-shaped plate 14 will be located between two adjacent support plates 11. At this time, the arc-shaped plate 14 on the support plate 11 can be rotatably engaged in the groove 113 on the adjacent support plate 11, so that the fracture openings of the cylindrical structure are closed. Therefore, all the support units 1 are spliced ​​together to form a complete cylindrical shape, so that the support structure can provide stable support for the side of the foundation pit.

[0039] The outer wall of the arc plate 14 is equipped with a second fan blade 142. When all the support units 1 are spliced ​​together into a cylindrical shape, all the first fan blades 111 and all the second fan blades 142 will form a complete spiral blade, so that the entire support structure is spirally embedded into the pit, which improves the stability of the support structure in the pit.

[0040] A torsion spring 141 is provided in the groove 113 for the rotatable connection of the arc plate 14. The two ends of the torsion spring 141 are respectively connected to the arc plate 14 and the support plate 11. When the support plates 11 stored together slide apart, the first blade 111 on the outer wall of the support plate 11 will slide against the inner wall of the arc plate 14 on its outer support plate 11. At this time, the torsion spring 141 will be in a deformed state. When the four support plates 11 are spliced ​​together to form a cylindrical structure with four fractures, the first blade 111 on the outer wall of the support plate 11 will detach from the inner wall of the arc plate 14 on its outer support plate 11. At this time, the torsion spring 141 will gradually return to its natural state and cause the arc plate 14 to rotate and reset. The arc plate 14 on the support plate 11 will rotate and engage with the groove 113 on the adjacent support plate 11, thereby realizing the rapid splicing of the four sets of support units 1.

[0041] At least one elastic cylinder 114 is installed on the groove wall of the groove 113 for the rotatable engagement of the arc plate 14. In this embodiment, there are two elastic cylinders 114, which are arranged at an upper and lower interval. The arc plate 14 is provided with a engagement groove 143 for the rotatable engagement of the elastic cylinder 114, and the engagement groove 143 corresponds to the elastic cylinder 114 one by one.

[0042] When all support units 1 are assembled into a cylindrical shape, the torsion spring 141 will cause the arc plate 14 to rotate and reset. The arc plate 14 will rotate into the corresponding groove 113, so that the elastic cylinder 114 will rotate and engage in the engagement groove 143. The arc plate 14 will connect two adjacent support plates 11 into one, so that all support units 1 form a force-bearing whole, thereby improving the stability of the support structure.

[0043] The inner wall of the support plate 11 is provided with through holes 115 corresponding to the inner side of the elastic cylinder 114, and the same horizontal pin 116 is inserted into the corresponding through holes 115 and elastic cylinder 114. After the support structure is rotated and embedded into the pit, the horizontal pin 116 inserted into the through holes 115 and elastic cylinder 114 can also be inserted into the side of the pit, so that the arc plate 14 and the support plate 11 are pressed and fixed to the side of the pit, thereby improving the support effect of the support structure on the side of the pit.

[0044] The implementation principle of a foundation pit support structure in this application embodiment is as follows: by sliding the support plate 11 on the arc-shaped rod 12, the support unit 1 can be slidably embedded into the storage cavity 13 of the adjacent support unit 1; by sliding the three sets of support units 1 in sequence, the three sets of support units 1 can be stored in the storage cavity 13 of the outer support unit 1, which reduces the overall space occupied by the support structure and facilitates the storage and transportation of the support structure.

[0045] Meanwhile, the friction sleeve 123 inside the storage cavity 13 will be securely embedded in the through groove 112 on the support plate 11 located inside the storage cavity 13. The friction between the outer wall of the friction sleeve 123 and the groove wall of the through groove 112 will make it difficult for two adjacent support plates 11 to separate from each other, thereby improving the stability of the support unit 1 when it is stored, so as to facilitate the synchronous transportation of the four sets of support units 1.

[0046] When the worker slides the support unit 1 in the reverse direction, so that all the support plates 11 are arranged coaxially, all the support plates 11 will be arranged circumferentially, and the opposite sides of every two adjacent support plates 11 will be spaced apart. At this time, all the support plates 11 will form a cylindrical structure with four fracture openings. Then the torsion spring 141 will gradually return to its natural state and cause the arc plate 14 to rotate and reset. The arc plate 14 on the support plate 11 will rotate and engage with the groove 113 on the adjacent support plate 11. The elastic cylinder 114 rotates and engages with the engaging groove 143, so that all the support units 1 form a whole under force, thereby realizing the rapid splicing of the four sets of support units 1 and improving the support efficiency of the foundation pit.

[0047] At the same time, all the first blades 111 and all the second blades 142 will together form a complete spiral blade so that the entire support structure is spirally embedded into the pit. Then, the workers can insert the horizontal pins 116 through the corresponding through holes 115 and elastic cylinders 114 and insert them into the side of the pit, so that the arc plate 14 and the support plate 11 are pressed and fixed to the side of the pit, thereby improving the support effect of the support structure on the side of the pit.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A foundation pit support structure characterized by: The supporting unit (1) comprises an arc-shaped supporting plate (11), a first fan blade (111) mounted on the outer wall of the supporting plate (11), and at least one arc-shaped rod (12) mounted on the inner wall of the supporting plate (11). One side of the supporting plate (11) is provided with a through slot (112) for the arc-shaped rod (12) on the adjacent supporting plate (11) to rotate and pass through. The through slot (112) corresponds to the arc-shaped rod (12). The horizontal distance between the arc-shaped rod (12) and the inner wall of the supporting plate (11) gradually increases from one side of the supporting plate (11) to the other side. The inner side of the supporting plate (11) is provided with a receiving cavity (13) for the rotation and embedding of the adjacent supporting unit (1). When the supporting plate (11) rotates on the arc-shaped rod (12), all the supporting plates (11) are coaxially arranged. Each two adjacent supporting plates (11) are spaced apart from each other. The top of the supporting plate (11) is provided with a fixing unit (2) for fixing on the ground. The fixing unit (2) is located at the side with a larger horizontal distance between the arc-shaped rod (12) and the inner wall of the supporting plate (11).

2. A foundation pit support structure according to claim 1, wherein: Both sides of the supporting plate (11) are provided with grooves (113) penetrating the outer wall of the supporting plate (11). One of the grooves (113) is provided with an arc-shaped plate (14) which is flipped on the horizontal plane. One end of the arc-shaped plate (14) is rotatably connected to the groove wall of the groove (113). The other end of the arc-shaped plate (14) is rotatably connected to the groove (113) of the adjacent supporting plate (11), so that all the supporting units (1) are jointly spliced into a cylindrical shape.

3. A retaining structure according to claim 2, wherein: The groove (113) for the rotation of the arc-shaped plate (14) is provided with a torsion spring (141) for facilitating the arc-shaped plate (14) to be connected to the groove (113) of the adjacent supporting plate (11). The two ends of the torsion spring (141) are connected to the arc-shaped plate (14) and the supporting plate (11) respectively.

4. A retaining structure according to claim 2, wherein: The groove wall of the groove (113) for the rotation of the arc-shaped plate (14) is provided with at least one elastic cylinder (114). The arc-shaped plate (14) is provided with a connecting groove (143) for the rotation of the elastic cylinder (114). The connecting groove (143) corresponds to the elastic cylinder (114). When all the supporting units (1) are jointly spliced into a cylindrical shape, the elastic cylinder (114) is rotatably connected to the connecting groove (143).

5. A retaining structure according to claim 4, wherein: The inner wall of the supporting plate (11) is provided with a through hole (115) corresponding to the inner side of the elastic cylinder (114). The corresponding through hole (115) and the elastic cylinder (114) are provided with the same horizontal plug (116).

6. A retaining structure according to claim 2 wherein: The outer wall of the arc-shaped plate (14) is provided with a second fan blade (142). When all the supporting units (1) are jointly spliced into a cylindrical shape, all the first fan blades (111) and all the second fan blades (142) jointly form a complete spiral blade.

7. A retaining structure according to claim 1 wherein: The horizontal spacing between the arc-shaped rod (12) and the inner wall of the supporting plate (11) is greater at one end, and a ring groove (122) is arranged at the end, a friction sleeve (123) is embedded in the ring groove (122), and the friction sleeve (123) is used for fastening the embedded wear-resistant sleeve in the penetrating groove (112).

8. A retaining structure according to claim 1 wherein: The fixing unit (2) comprises a mounting plate (21) mounted on the top of the supporting plate (11), and a plurality of vertical insertion nails (22) are slidably penetrated in the vertical direction on the mounting plate (21).

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