Deep foundation pit supporting structure
Through splicable guard plate structure and anchor rod fixation, the problem of inflexible use of deep foundation pit support structures is solved, flexible support and stable connection are achieved, construction risks and difficulty are reduced, and the applicability and life of the structure are improved.
Patent Information
- Application Number
- CN202422119077.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-08-30
AI Technical Summary
In the prior art, the deep foundation pit support structure is not flexible enough to be used and cannot be dug and supported according to the foundation pit excavation progress, resulting in an increase in the risk of soil collapse on the side wall of the foundation pit and high construction difficulty.
The splicable guard plate structure is adopted, including vertically arranged baffle, connecting assembly and clamping assembly, which is fixed to the side wall of the foundation pit by anchor rods, and combined with adjustable oblique braces and pads, the baffle is flexible laying and stable connection.
It realizes flexible support according to the foundation pit construction progress, reduces the risk of soil collapse, reduces construction difficulty, and is convenient for transportation and recycling, improving the stability and service life of the support structure.
Smart Images
Figure CN223163898U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of foundation pit support, in particular to a deep foundation pit support structure. Background Technique
[0002] Generally, a foundation pit with a excavation depth exceeding 5m, or a foundation pit with a depth not exceeding 5m but with particularly complex geological conditions, surrounding environment and underground pipelines is a deep foundation pit. Generally, a support structure is arranged around the deep foundation pit to bear the earth pressure and water pressure generated by the unloading of the foundation pit excavation.
[0003] After the foundation pit is excavated, the soil at the bottom is prone to heave under the unloading action; workers often set up corresponding support structures for enclosure, such as cast-in-place piles, diaphragm walls, etc.
[0004] However, the construction of cast-in-place piles and diaphragm walls requires workers to first dig a groove structure for setting cast-in-place piles and diaphragm walls on the foundation pit, and then carry out the construction of cast-in-place piles and diaphragm walls, so that the use of cast-in-place piles and diaphragm walls is not flexible enough and cannot be supported as the foundation pit is excavated according to the excavation progress. Summary of the Invention
[0005] The purpose of the utility model is to provide a deep foundation pit support structure, aiming at solving the problems that the general technical foundation pit support structure is not flexible enough in use and cannot be supported as the foundation pit is excavated according to the excavation progress.
[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A deep foundation pit support structure includes a protection plate, the protection plate includes a plurality of vertically arranged baffles, connection components are arranged at the upper and lower ends of the baffles, clamping components are arranged at the left and right ends of the baffles, adjacent baffles are spliced in the height direction and the length direction through the connection components and the clamping components, and a plurality of installation holes are opened on the baffles, anchor rods are inserted in the plurality of installation holes, the lower end of the lowermost baffle is connected with a vertically rotating backing plate, and an inclined strut is detachably arranged between the backing plate and the baffle.
[0007] The beneficial effects are as follows: Installation holes are formed in the baffle plate and anchor rods are provided to fix the baffle plate to the side wall of the foundation pit, which facilitates the staff to lay the baffle plate according to the construction progress, and then support the side wall of the excavated foundation pit. This enables the staff to support and fix the foundation pit side wall as they dig, reducing the impact on construction caused by the soil body collapse of the foundation pit side wall due to stress concentration during the excavation of the foundation pit; The guard plate is composed of several baffle plates spliced through a connection component and a clamping component, enabling the staff to adjust the number of baffle plates according to the actual needs of the foundation pit, reducing the construction difficulty, and the setting of splitting into several baffle plates is also convenient for transportation; When the staff clean the bottom of the foundation pit or carry out construction of other structures, the cushion plate provides a construction platform for the staff, and the setting of the inclined strut further enhances the stability of the baffle plate after installation, and the detachable inclined strut is also convenient for construction and transportation.
[0008] A further technical solution of the present utility model is that the connection component includes a connection block and a connection groove. The connection block and the connection groove are respectively arranged at the upper and lower ends of the baffle plate. The connection block on the adjacent baffle plate is arranged in the connection groove, and an anchor rod penetrating through the connection block and the connection groove is provided on the baffle plate, and one end of the anchor rod is anchored in the side wall of the foundation pit.
[0009] The beneficial effects are as follows: The splicing of adjacent baffle plates in the height direction is realized through the connection groove and the connection block. The connection strength of adjacent baffle plates is improved through the anchor rod. At the same time, the part of the anchor rod penetrating through the connection groove and the connection block and partially penetrating into the side wall of the foundation pit enhances the connection strength between the baffle plate and the soil body.
[0010] A further technical solution of the present utility model is that the clamping component includes a clamping block and a clamping groove. The clamping block and the clamping groove are respectively arranged at the left and right ends of the baffle plate. The clamping block on the adjacent baffle plate is arranged in the clamping groove, and an anchor rod penetrating through the connection block and the connection groove is provided on the baffle plate, and one end of the anchor rod is anchored in the side wall of the foundation pit.
[0011] The beneficial effects are as follows: The connection of adjacent baffle plates in the length direction is realized through the clamping block and the clamping groove. At the same time, the setting of the clamping block and the clamping groove is also convenient for the installation of adjacent baffle plates, and the setting of the anchor rod improves the splicing stability of adjacent baffle plates.
[0012] A further technical solution of the present utility model is that the length of the inclined strut is adjustable.
[0013] The beneficial effects are as follows: When the excavated foundation pit has a certain slope, the angle between the baffle plate and the cushion plate changes with the different slopes of the foundation pit. The adjustable length of the inclined strut enables the length of the inclined strut to be adjusted according to the actual slope of the foundation pit, so that the baffle plate and the cushion plate can be applicable to foundation pits with different slopes.
[0014] A further technical solution of the present utility model is that both ends of the inclined strut in the length direction are respectively hinged to the baffle plate and the cushion plate.
[0015] The beneficial effects are as follows: By hinging both ends of the diagonal brace in the length direction to the baffle and the backing plate, the diagonal brace can adjust its installation angle according to the inclination angle of the baffle.
[0016] A further technical solution of the present utility model is that a plurality of lifting rings are provided on the surface of the baffle.
[0017] The beneficial effects are as follows: Through the arrangement of the lifting rings, the staff can hoist the baffle with external tools, reducing the difficulty of handling the baffle during installation.
[0018] A further technical solution of the present utility model is that mounting rings are provided on the surface of the anchor rod.
[0019] The beneficial effects are as follows: Through the arrangement of the mounting rings, it is convenient for the staff to pull out the anchor rod from the soil after the project is completed, and it is convenient for the staff to remove the baffle and thus achieve recycling.
[0020] A further technical solution of the present utility model is that a protective layer is provided on the surface of the baffle.
[0021] The beneficial effects are as follows: Since the baffle is the main structure for foundation pit support and abuts against the soil, due to the influence of moisture, salts, acid-base substances, microorganisms, etc. in the soil, the baffle is corroded, which affects the service life of the baffle. By providing a protective layer to isolate the direct contact between the baffle and the soil, the corrosion of the baffle is prevented. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of the overall structure of the guard plate installation.
[0023] Figure 2 It is a side view of the guard plate installation structure.
[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the card slot of the baffle.
[0025] In the figure: 1. Guard plate; 2. Baffle; 3. Connection assembly; 31. Connection block; 32. Connection slot; 4. Clamping assembly; 41. Clamping block; 42. Card slot; 5. Mounting hole; 6. Anchor rod; 7. Backing plate; 8. Diagonal brace; 9. Connection plate; 10. Lifting ring; 11. Mounting ring; 12. Protective layer. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] The following further describes the specific embodiments of the present utility model in conjunction with the attached Figures 1-3 drawings.
[0027] As Figure 1 shown, a deep foundation pit support structure includes a guard plate 1, and the guard plate 1 includes a plurality of baffles 2 spliced end to end. The guard plate 1 is formed by splicing a plurality of baffles 2 end to end to support the side wall of the foundation pit.
[0028] Referring to Figure 1 and Figure 2 , in this embodiment, connection components 3 are provided at the upper and lower ends of the baffle 2. The connection components 3 include connection blocks 31 and connection grooves 32. The connection blocks 31 are fixedly connected to the lower end of the baffle 2, and the length direction of the connection blocks 31 is aligned with the left - right direction of the connection plate 9. The connection grooves 32 are formed in the upper end of the baffle 2. The connection blocks 31 and the connection grooves 32 are of matching sizes. The connection blocks 31 on adjacent baffles 2 are installed in the connection grooves 32, thereby realizing the splicing of the guard plate 1 in the height direction.
[0029] Referring to Figure 1 , clamping components 4 are provided at the left and right ends of the baffle 2. The clamping components 4 include clamping blocks 41 and clamping grooves 42. The clamping blocks 41 and the clamping grooves 42 are respectively arranged at the left and right ends of the baffle 2. In this embodiment, there are two groups of clamping blocks 41 and clamping grooves 42. The clamping blocks 41 are fixedly connected to the baffle 2, the clamping grooves 42 are formed in the baffle 2, the clamping blocks 41 and the clamping grooves 42 are of matching sizes, and the clamping blocks 41 on adjacent baffles 2 are installed in the clamping grooves 42, thereby splicing the left and right ends of the baffle 2 to complete the splicing of the guard plate 1 in the length direction.
[0030] Referring to Figure 1 and Figure 2 , a number of installation holes 5 are formed in the baffle 2. Anchor rods 6 are inserted into each of the number of installation holes 5. The anchor rods 6 pass through the installation holes 5 and are inserted into the soil body, thereby connecting and fixing the baffle 2 to the side wall of the foundation pit.
[0031] Referring to Figure 1 and Figure 2 , in order to improve the stability of the splicing of adjacent baffles 2 in the length direction, some of the installation holes 5 are formed in the clamping blocks 41 and the clamping grooves 42. The anchor rods 6 penetrate through the clamping blocks 41 and the clamping grooves 42 and one end of the anchor rods 6 is anchored in the side wall of the foundation pit.
[0032] Referring to Figure 1 and Figure 2 , in order to improve the stability of the splicing of adjacent baffles 2 in the height direction, some of the installation holes 5 are formed in the connection blocks 31 and the connection grooves 32. The anchor rods 6 penetrate through the connection blocks 31 and the connection grooves 32 and one end of the anchor rods 6 is anchored in the side wall of the foundation pit.
[0033] Referring to Figure 1 , when it is necessary to remove the baffle 2 after the construction is completed, in order to facilitate the extraction of the anchor rod 6, in this embodiment, an installation ring 11 is fixedly connected to the surface of the anchor rod 6. Workers can use external tools to connect with the installation ring 11, and then pull out the anchor rod from the side wall of the foundation pit.
[0034] Referring to Figure 1, due to different foundation pit excavation plans, there are foundation pits with stepped construction. During the stepped construction process, workers need to construct at the bottom of the already excavated foundation pit. To facilitate the construction of workers, in this embodiment, the lower end of the baffle 2 at the bottom is connected with a rotatable backing plate 7. The rotatable backing plate 7 enables the backing plate 7 to meet the construction requirements and adjust the angle of the backing plate 7 according to the construction requirements or adjust the installation angle of the backing plate 7 according to the installation angle of the baffle 2.
[0035] Refer to Figure 1 , in this embodiment, the backing plate 7 is hinged with a rotating plate, and the rotating plate matches the size of the connecting groove 32 and is installed in the connecting groove 32.
[0036] Refer to Figure 1 and Figure 2 , to improve the stability of the rotating plate installed in the connecting groove 32, mounting holes 5 corresponding to the connecting groove are provided on the rotating plate. The anchor rod 6 passes through the rotating plate and the connecting groove 32, and one end of the anchor rod 6 is anchored in the side wall of the foundation pit.
[0037] Refer to Figure 2 , in this embodiment, to improve the stability of the installation of the backing plate 7, an anchor rod 6 is also installed on the backing plate 7. The anchor rod 6 passes through the backing plate 7, and one end of the anchor rod 6 is anchored in the soil at the bottom of the foundation pit.
[0038] Refer to Figure 1 and Figure 2 , to improve the stability of the baffle 2 during use, in this embodiment, a diagonal brace 8 is installed between the baffle 2 and the backing plate 7. And to facilitate the installation of the diagonal brace 8, both ends of the diagonal brace 8 in the length direction are hinged to the baffle 2 and the backing plate 7 respectively.
[0039] Refer to Figure 1 and Figure 2 , two opposite connecting plates 9 are fixedly installed on the surfaces of the baffle 2 and the backing plate 7, and both ends of the diagonal brace 8 in the length direction are hinged to the connecting plates.
[0040] Refer to Figure 1 , in this embodiment, two connecting holes are provided on the connecting plate 9 located on the backing plate 7, so that the connecting plate 9 can simultaneously rotatably connect two diagonal braces 8; however, for other embodiments, the number of connecting holes can be adjusted according to actual needs.
[0041] Refer to Figure 1 and Figure 2 , in this embodiment, the diagonal brace 8 includes two threaded rods and a threaded sleeve rotatably connected at the joint of the threaded rods. Rotating the threaded sleeve can adjust the length of the two threaded rods extending from the threaded sleeve according to the actual slope of the foundation pit, so that both ends of the diagonal brace 8 in the length direction are connected to the connecting baffle 2 and the backing plate 7.
[0042] Referring to Figure 1 , in order to facilitate the installation of the baffle 2 by the staff, in this embodiment, two lifting rings 10 are fixedly installed on the surface of the baffle 2, and the staff can connect with the lifting rings 10 through external equipment and then hoist the baffle 2 to the supporting position.
[0043] Referring to Figure 3 , since the baffle 2 needs to be in contact with the soil mass for a long time, in this embodiment, the baffle 2 is made of metal material, and a protective layer 12 is provided on the surface of the baffle 2. The protective layer 12 is an anti-corrosion layer, and the anti-corrosion layer is used to improve the anti-corrosion ability of the baffle 2, thereby improving the service life of the baffle 2. At the same time, using metal material for the baffle 2 also facilitates the staff to recycle the baffle 2 after the support is completed.
[0044] The implementation principle of this embodiment is: before construction, determine the size of the baffle 2 according to the construction requirements, and prefabricate it in the factory after the size of the baffle 2 is determined; and determine the size of the backing plate 7 according to the construction requirements, and prefabricate it in the factory after the size of the backing plate 7 is determined.
[0045] Transport the prefabricated baffle 2 and backing plate 7 in the factory to the construction site, and equip with a corresponding number of anchor bolts 6 and diagonal braces 8, and then carry out the excavation of the foundation pit.
[0046] As the foundation pit is excavated, when the size of the excavated foundation pit reaches the size for laying the baffle 2, lay the baffle 2 on the side wall of the excavated foundation pit and install the anchor bolts 6 to fix the baffle 2.
[0047] As the foundation pit is excavated in the width direction, the size in the width direction of the foundation pit gradually expands. Lay the baffle 2 along the width direction of the foundation pit and splice the adjacent baffles 2 through the clamping blocks 41 and clamping grooves 42, and install the anchor bolts 6 to fix the clamping blocks 41 and clamping grooves 42.
[0048] As the foundation pit is excavated in the depth direction, the size in the depth direction of the foundation pit gradually expands. Splice the connecting blocks 31 and connecting grooves 32 at the upper and lower ends of the adjacent baffles 2 and install the anchor bolts 6 to fix them.
[0049] When the foundation pit is excavated to a certain depth and the bottom of the foundation pit is adjusted, install the backing plate 7 at the bottom of the baffle 2, and install the anchor bolts 6 to fix the backing plate 7 to the bottom of the foundation pit.
[0050] Install the diagonal brace 8 between the baffle 2 and the backing plate 7, and adjust the length of the diagonal brace 8 according to the slope of the baffle 2, so that the two ends in the length direction of the diagonal brace 8 are respectively connected to the baffle 2 and the backing plate 7.
[0051] After the overall construction of the building is completed, the inclined strut 8 is removed. The staff fixes and installs external tools to pull out the anchor rod 6, and then removes the baffle plate 2 and the backing plate 7. For the removed anchor rod 6, baffle plate 2, backing plate 7 and inclined strut 8, it is decided whether to recycle or scrap them according to their usage conditions.
Claims
1. A deep foundation pit support structure, characterized in that, It includes a protective plate (1), the protective plate (1) includes a number of vertically arranged baffles (2), connection components (3) are arranged at the upper and lower ends of the baffles (2), clamping components (4) are arranged at the left and right ends of the baffles (2), adjacent baffles (2) are spliced in the height direction and the length direction through the connection components (3) and the clamping components (4), and a number of mounting holes (5) are formed in the baffles (2), anchor rods (6) are inserted in a number of the mounting holes (5), a cushion plate (7) that rotates up and down is connected to the lower end of the lowermost baffle (2), and a diagonal brace (8) can be arranged between the cushion plate (7) and the baffle (2).
2. The deep foundation pit support structure according to claim 1, characterized in that, The connection component (3) includes a connection block (31) and a connection groove (32), the connection block (31) and the connection groove (32) are respectively arranged at the upper and lower ends of the baffle (2), the connection block (31) on the adjacent baffle (2) is arranged in the connection groove (32), and an anchor rod (6) passing through the connection block (31) and the connection groove (32) is arranged on the baffle (2), and one end of the anchor rod (6) is anchored in the side wall of the foundation pit.
3. A deep foundation pit support structure according to claim 1, characterized in that, The clamping component (4) includes a clamping block (41) and a clamping groove (42), the clamping block (41) and the clamping groove (42) are respectively arranged at the left and right ends of the baffle (2), the clamping block (41) on the adjacent baffle (2) is arranged in the clamping groove (42), and an anchor rod (6) passing through the connection block (31) and the connection groove (32) is arranged on the baffle (2), and one end of the anchor rod (6) is anchored in the side wall of the foundation pit.
4. A deep foundation pit support structure according to claim 1, characterized in that, The length of the diagonal brace (8) is adjustable.
5. A deep foundation pit support structure according to claim 4, characterized in that, Both ends in the length direction of the diagonal brace (8) are respectively hinged to the baffle (2) and the cushion plate (7).
6. The deep foundation pit support structure according to claim 1, characterized in that, A number of lifting rings (10) are arranged on the surface of the baffle (2).
7. A deep foundation pit support structure according to claim 1, characterized in that, Mounting rings (11) are arranged on the surface of the anchor rod (6).
8. A deep foundation pit support structure according to claim 1, characterized in that, A protective layer (12) is arranged on the surface of the baffle (2).