Inclined inner supporting structure for foundation pit support
By setting up a rotating device in the obliquely inward support structure to adjust the angle between the connection between the steel lattice column and the soil, the problems of low bearing capacity and large construction space demand caused by inconsistent angles of the steel lattice column in the prior art are solved, and higher construction accuracy and bearing capacity, as well as resource and cost savings are achieved.
Patent Information
- Application Number
- CN202422193441.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-06
AI Technical Summary
During the construction process of the existing oblique inward support structure, the angle between the steel lattice column and the soil is difficult to coincide, resulting in low bearing capacity and large external space required for construction, resulting in waste of resources and increased costs.
By setting up a rotating device, the position of the connection between the steel lattice column and the soil can be adjusted, the connection angle between the steel lattice column and the embedded support can be adjusted, the construction accuracy and bearing capacity can be improved, and the demand for external construction space is reduced.
The layout accuracy of steel lattice columns is improved, angle deviation is avoided, the bearing capacity of the oblique inward support structure is enhanced, construction space and resources are saved, and costs are reduced.
Smart Images
Figure CN223003414U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of foundation pit retaining, in particular to an inclined inner support structure for foundation pit retaining. Background Technique
[0002] In order to ensure the construction space of the underground structure and the safety of the surrounding environment during the development of the underground space, protection measures such as retaining walls or support structures are usually required to be set in the foundation pit.
[0003] In recent years, a support system with an inclined inner support structure has emerged. The current inclined inner support structure includes steel lattice columns, retaining piles and capping beams. The steel lattice columns, retaining piles and capping beams are arranged in the foundation pit. The retaining piles are connected to the soil body. The steel lattice columns can resist the horizontal thrust transmitted by the soil outside the foundation pit through the retaining piles and convert it into its own axial force, and effectively transmit the axial load to the soil body with stronger bearing capacity deep in the foundation, enhancing the overall safety and stability of the support system. The capping beam is located at the top of the steel lattice columns and the retaining piles. The capping beam is mainly used to support the retaining piles and transmit the soil pressure downward.
[0004] However, in the existing inclined inner support structure, one end of the steel lattice column is connected to the capping beam, and the other end of the steel lattice column is connected to the soil body. The steel lattice column is generally obliquely driven into the soil body by an inclined pile driving device or implanted into the inclined cement soil of the already constructed soil body. The angle when the inclined pile driving device drives into the soil body is difficult to be consistent with the originally designed angle, and a large construction space beside the foundation pit needs to be reserved when driving the steel lattice column from the ground. The part of the steel lattice column connected to the lower part of the soil body cannot be taken out and is permanently left in the soil body. It is difficult to construct obliquely in the area where local engineering piles are dense; due to the angle when the inclined pile driving device drives into the soil body being difficult to be consistent with the originally designed angle, there is a deviation between the steel lattice column and the originally designed angle, which easily leads to low bearing capacity of the inclined inner support structure, and the steel lattice column will produce a squeezing effect on the surrounding soil during the process of driving into the soil body, which is likely to have an adverse impact on the surrounding already constructed engineering piles. In addition, a large external construction space needs to be reserved when driving the steel lattice column from the ground, which easily causes the steel lattice column to exceed the land use red line after being hoisted on the pile driving equipment. For the part of the steel lattice column connected to the lower part of the soil body left in the soil body, it is easy to cause waste of resources and increase the cost.
[0005] Therefore, there is room for further improvement in the existing inclined inner support structure. Content of the Utility Model
[0006] In view of this, in the existing technology, it is difficult for the angle of the diagonal pile driving equipment when driving into the soil to be consistent with the originally designed angle, and the requirement for the construction space outside the foundation pit is relatively large, resulting in a deviation between the steel lattice column and the originally designed angle, which easily leads to a low bearing capacity of the inclined internal support structure and makes construction difficult. The present application provides an inclined internal support structure for foundation pit enclosure. By setting a rotating device, the position of the connection between the steel lattice column and the soil can be adjusted. By adjusting the position of the steel lattice column through the rotating device, the angle deviation at the connection between the steel lattice column and the soil inside the soil can be reduced, thereby improving the bearing capacity of the internal support structure. In addition, this inclined internal support structure is constructed inside the foundation pit, with a relatively small requirement for the construction space outside the foundation pit, reducing the dependence on the external operation site.
[0007] To achieve the above object, the present utility model provides the following technical solution: An inclined internal support structure for foundation pit enclosure, and the inclined internal support structure is arranged inside the foundation pit;
[0008] The inclined internal support structure includes a steel lattice column, a rotating device, and an embedded support. The rotating device is connected to the embedded support, and the rotating device is rotatably connected to the steel lattice column;
[0009] The rotating device is arranged on the top of the embedded support, and the rotating device is used to adjust the connection angle between the steel lattice column and the embedded support.
[0010] Compared with the existing technology, the inclined internal support structure for foundation pit enclosure in the present application is characterized in that a rotating device is provided. The rotating device is connected to the embedded support, the bottom of the embedded support is connected to the soil, the rotating device is rotatably connected to the steel lattice column, the rotating device is arranged on the top of the embedded support, and the rotating device is used to adjust the connection angle between the steel lattice column and the embedded support. Therefore, the rotating device in the present application can adjust the connection angle between the steel lattice column and the embedded support, greatly improving the layout accuracy of the steel lattice column during construction, avoiding the deviation of the inclination angle and position of the steel lattice column, and ensuring the bearing capacity of the inclined internal support.
[0011] In some embodiments of the present application, the rotating device includes a rotating assembly and a support member; one side of the support member is fixedly connected to the embedded support, and the other side is rotatably connected to the rotating assembly;
[0012] The rotating assembly is connected to the steel lattice column.
[0013] In some embodiments of the present application, the rotating device further includes a support base, one side of the support base is connected to the embedded support, and the other side is fixedly connected to the support member.
[0014] Further, a sliding groove is provided on the support member, at least a part of the rotating assembly is located in the sliding groove, and the sliding groove is used to guide the rotation of the rotating assembly.
[0015] Further, the rotating assembly includes a rotating rod and a fixed support plate, the rotating rod is fixed to the fixed support plate, and the rotating rod can slide along the sliding groove;
[0016] One side of the fixed support plate is rotatably connected to the steel lattice column, and the other side is connected to the support member.
[0017] Further, a fixing member is also provided on the support member, the fixing member is arranged at an interval from the sliding groove, and the fixing member is used to fix the fixed support plate and the support member.
[0018] Further, the sliding groove is arc-shaped, one end of the sliding groove is arranged corresponding to the fixing member, and the other end is arranged at the edge of the support member;
[0019] There is a certain radian between the sliding groove and the fixing member.
[0020] Further, a locking nut is provided on the rotating rod, the locking nut is connected to the rotating rod, and the locking nut is used to lock the rotating rod relative to the support member.
[0021] In some embodiments of the present application, it further includes a retaining pile and a capping beam, and the retaining pile is connected to the capping beam;
[0022] The capping beam is arranged at the top of the retaining pile, and the capping beam is connected to one end of the steel lattice column far away from the embedded support.
[0023] In some embodiments of the present application, multiple adjacent steel lattice columns are connected to the same embedded support;
[0024] Or,
[0025] Each steel lattice column is connected to a corresponding single embedded support.
[0026] An inclined internal support structure for foundation pit enclosure in the present application has at least the following technical effects:
[0027] 1. By setting the embedded support, the strength of the lower end of the steel lattice column and the embedded support is enhanced, the length of the steel lattice column is greatly shortened, thereby reducing the part of the cement-soil mixing pile and the inserted pile at the lower end of the steel lattice column, reducing materials. And for soft soil geology, by setting the embedded support, the steel lattice column can be prevented from directly contacting the soil body, the steel lattice column is directly lapped on the embedded support, and the embedded support can penetrate into harder soil layers and rocks to provide more stable support and increase the bearing capacity of the structure.
[0028] 2. By setting a rotating device, the bottom of the rotating device is connected to the embedded support, and one side of the steel lattice column close to the embedded support is connected to the rotating device. The rotating device is used to adjust the connection angle at the joint between the steel lattice column and the embedded support, greatly improving the layout accuracy of the steel lattice column during construction, avoiding the deviation of the inclination angle and position of the steel lattice column, and ensuring the bearing capacity of the inclined internal support.
[0029] 3. By connecting multiple steel lattice columns to the embedded support or connecting each steel lattice column to the corresponding single embedded support, the position of the engineering pile can be considered during the design of the retaining pile, thus solving the problem that it is difficult to arrange the steel lattice column in the area where the engineering piles are dense locally, which is beneficial to improving the construction efficiency and saving construction time.
[0030] 4. The construction operations of the inclined internal support structure are all located inside the foundation pit. The construction of the embedded support can be completed by using conventional pile-forming machinery, without the need for special inclined pile-driving equipment, and it does not occupy the space outside the foundation pit, thus avoiding the problem of exceeding the land use red line during the construction of the inclined internal support structure, eliminating the construction site restrictions, and improving the applicability of the technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 is a schematic structural diagram of an inclined internal support structure for foundation pit retaining provided by an embodiment of the present application;
[0032] Figure 2 is a schematic relative position structure diagram of the steel lattice column and the rotating device of the inclined internal support structure for foundation pit retaining provided by an embodiment of the present application;
[0033] Figure 3 is Figure 2 an enlarged structural diagram of part A;
[0034] Figure 4 is a schematic structural diagram of the rotating device of the inclined internal support structure for foundation pit retaining provided by an embodiment of the present application;
[0035] Figure 5 is a schematic relative position structure diagram of the steel lattice column, the embedded support and the rotating device of the inclined internal support structure for foundation pit retaining as viewed from above the foundation pit provided by an embodiment of the present application;
[0036] Figure 6 is a schematic structural diagram of the construction method of pre-excavating soil of the inclined internal support structure for foundation pit retaining provided by an embodiment of the present application;
[0037] Figure 7 is a top view schematic diagram of the inclined internal support structure for foundation pit retaining provided by an embodiment of the present application;
[0038] Figure 8It is a schematic diagram of the earthwork excavation at the pre - excavated lattice column and embedded support arrangement as seen from above the foundation pit for the inclined internal support structure provided by an embodiment of the present application;
[0039] Figure 9 It is a schematic structure diagram of connecting three adjacent lattice columns to a single embedded support as seen from above the foundation pit for the inclined internal support structure provided by an embodiment of the present application Figure 1 ;
[0040] Figure 10 It is a schematic structure diagram of connecting three adjacent lattice columns to a single embedded support as seen from above the foundation pit for the inclined internal support structure provided by an embodiment of the present application Figure 2 ;
[0041] Figure 11 It is a schematic diagram of connecting two adjacent lattice columns to a single embedded support as seen from above the foundation pit for the inclined internal support structure provided by an embodiment of the present application;
[0042] Figure 12 It is a cross - sectional schematic diagram of the lattice column of the inclined internal support structure provided by an embodiment of the present application.
[0043] Reference numerals:
[0044] 1. Inclined internal support structure;
[0045] 11. Lattice column; 12. Embedded support; 13. Rotating device; 14. Coping beam; 15. Retaining pile; 16. Basement floor slab; 17. Cushion; 18. Earthwork at lattice column; 19. Earthwork at embedded support;
[0046] 111. Angle steel; 112. Connecting plate; 113. Waterproof steel plate;
[0047] 131. Support member; 132. Rotating assembly; 133. Support base; 134. Chute; 136. Locking nut; 137. Fixing member;
[0048] 1321. Fixed support plate; 1322. Rotating rod. Detailed implementation manners
[0049] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail, clearly, and completely below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.
[0050] In the description of the present application, if the first and second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence of the indicated technical features.
[0051] Those skilled in the art should understand that in the disclosure of the present application, the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present application.
[0052] The following further describes the present application in detail with reference to the drawings, as shown in Figures 1 to 12 description.
[0053] Embodiment 1
[0054] An inclined inner bracing structure for foundation pit retaining provided in this embodiment is applied to foundation pit retaining. Specifically, as Figures 1 to 12 shown, the inclined inner bracing structure 1 is arranged in the foundation pit. The inclined inner bracing structure 1 is constructed inside the foundation pit, with less demand for the external construction space of the foundation pit, reducing the dependence on the external working site. Moreover, the inclined inner bracing structure 1 can reduce the area covered by the inner bracing in the foundation pit, which is beneficial for construction machinery to enter the pit for excavation operations, thereby improving the efficiency of earth excavation in the pit and shortening the construction period. The inclined inner bracing structure 1 includes a steel lattice column 11, a pre-embedded support 12, and a rotating device 13. The rotating device 13 is connected to the pre-embedded support 12 and is rotatably connected to the steel lattice column 11. The rotating device 13 is arranged on the top of the pre-embedded support 12 and is used to adjust the connection angle at the joint of the steel lattice column 11 and the pre-embedded support 12. Under soft soil geological conditions, the bottom soil of the inclined inner bracing structure 1 is reinforced by cement-soil mixing piles. The construction operations of the inclined inner bracing structure 1 are all located inside the foundation pit, and conventional pile-forming machinery can be used to complete the construction of the pre-embedded support 12 without special inclined pile-driving equipment, and it does not occupy the external space of the foundation pit, thus avoiding the problem of exceeding the land use red line during the construction of the inclined inner bracing structure 1, eliminating the construction site limitations, and enhancing the applicability of the technology.
[0055] In the embodiments of the present application, the bottom of the embedded support 12 is connected to the soil mass, and the top of the embedded support 12 is connected to the rotating device 13. The form of the embedded support 12 is adopted to improve the bearing capacity of the steel lattice column 11, strengthen the strength of the lower end of the steel lattice column 11 and the embedded support, and by setting the embedded support 12, the steel lattice column 11 is erected on the embedded support, improving the quality of the reinforcement between the steel lattice column 11 and the soil mass under soft soil geological conditions, reducing the length of the steel lattice column 11, and avoiding the situation that part of the connection between the steel lattice column 11 and the inside of the soil mass is long and non-recoverable, resulting in waste of resources. The steel lattice column 11 is not connected to the soil mass, avoiding the extrusion effect on the surrounding soil mass during the driving process of the steel lattice column 11 into the soil mass, thus avoiding adverse effects on the already constructed engineering piles, saving materials, greatly improving the layout accuracy of the steel lattice column 11 during the construction process, avoiding the deviation of the inclination angle and position of the steel lattice column 11 from the perspective of the construction method, thereby improving the bearing capacity at the connection between the steel lattice column 11 and the soil mass and improving the construction efficiency.
[0056] Specifically, as Figures 2 to 5 shown, the rotating device 13 includes a support member 131 and a rotating assembly 132. The support member 131 has a plate-like structure, the support member 131 has a triangular structure, there are two support members 131, and the two support members 131 are symmetrically arranged. The material of the support member 131 is an alloy material. One side of the support member 131 is fixedly connected to the embedded support 12, and the other side of the support member 131 is rotatably connected to the rotating assembly 132. The angle between the support member 131 and the embedded support 12 is 90°, that is, the support member 131 is vertically connected to the embedded support 12. The rotating assembly 132 is connected to the steel lattice column 11. Among them, the rotating device 13 further includes a support base 133. The support base 133 has a plate-like shape, the material of the support base 133 is an alloy material, the bottom of the support base 133 is fixedly connected to the embedded support 12, the top of the support base 133 is connected to the support member 131, the support base 133 is horizontally arranged, and the angle between the support member 131 and the support base 133 is 90°, that is, the support member 131 is vertically connected to the support base 133. The support base 133 is used for the support member 131, the support base 133 is used to bear the load of the support member 131 and distribute it to the embedded support 12. A channel is provided in the middle of the support base 133, and the shape of the channel is the same as that of the steel lattice column 11. The channel is used to place the steel lattice column 11, and the support member 131 is vertically arranged on both sides of the channel.
[0057] Furthermore, as Figure 4As shown in the figure, a chute 134 is provided on the support member 131. The rotating assembly 132 is at least partially located within the chute 134, and the chute 134 is used to guide the rotation of the rotating assembly 132. Among them, the rotating assembly 132 includes a rotating rod 1322 and a fixed support plate 1321. The rotating rod 1322 is fixed to the fixed support plate 1321. The fixed support plate 1321 is plate-shaped and is vertically arranged. The fixed support plate 1321 is connected to the support member 131. One side of the fixed support plate 1321 is rotatably connected to the steel lattice column 11, and the other side is connected to the support member 131. The fixed support plate 1321 is arranged on the side of the support member 131 away from the steel lattice column 11. By providing the chute 134, when the fixed support plate 1321 moves, the fixed support plate 1321 can drive the rotating rod 1322 to move within the inner cavity of the chute 134.
[0058] Furthermore, a fixing member 137 is also provided on the support member 131. The fixing member 137 is arranged at the top of the chute 134 and is spaced from the chute 134. The fixing member 137 is used to fix the support plate 1321 to the support member 131, enhancing the stability of the support member 131. The chute 134 is arc-shaped. One end of the chute 134 is correspondingly arranged with the fixing member 137, and the other end is arranged at the edge of the support member 131. There is a certain arc between the two ends of the chute 134 and the fixing member 137, and the arc < 90°. Among them, a locking nut 136 is provided on the rotating rod 1322. The locking nut 136 is connected to the rotating rod 1322. The locking nut 136 is used to lock the rotating rod 1322 relative to the support member 131. During the construction process, the steel lattice column 11 is connected and fixed to the hanging end of the small lifting equipment. After moving the steel lattice column 11 to the working position, the fixed support plate 1321 is moved to the required angle of the steel lattice column 11, and the rotating rod 1322 is fixed by the locking nut 136 to fix the use angle of the fixed support plate 1321.
[0059] In addition, the locking nut 136 can also be replaced by other fasteners with locking functions, not limited to the above embodiments, as long as the locking function can be achieved.
[0060] In this embodiment, as Figures 1 to 12As shown in the figure, retaining piles 15 and capping beams 14 are also provided in the foundation pit. The top of the retaining pile 15 is rigidly connected to the capping beam 14. The retaining pile 15 is circular and is arranged at intervals. The retaining pile 15 is arranged along the inner edge of the foundation pit. The retaining pile 15 is formed by pouring reinforced concrete. The retaining pile 15 is used to transfer the load of the upper building to the soil layer with stronger bearing capacity in the depth, or to compact the soft soil layer to improve the bearing capacity and compactness of the foundation soil. The capping beam 14 is rectangular and is arranged horizontally. The capping beam 14 extends along the upper end of the retaining pile 15. The capping beam 14 is located at the top of the retaining pile 15. At least part of the end of the steel lattice column 11 away from the embedded support 12 is connected to the capping beam 14. The capping beam 14 is formed by pouring reinforced concrete. The capping beam 14 is used to maintain the integrity and continuity in the foundation pit, thereby enhancing the seismic effect of the wall. The basement floor 16 is arranged horizontally, that is, the angle between the basement floor 16 and the retaining pile 15 is 90°. The basement floor 16 is arranged above the embedded support 12, that is, the basement floor 16 is vertically connected to the retaining pile 15, and at least part of the steel lattice column 11 passes through the basement floor 16 and is connected to the embedded support 12. After the strength of the basement floor 16 reaches the relevant requirements, the part of the steel lattice column 11 above the top surface of the basement floor 16 is cut off. After the construction of the entire basement structure is completed, the capping beam 14 is chiseled off and the steel lattice column 11 is removed. A cushion layer 17 is provided at the bottom of the basement floor 16. The cushion layer 17 is mainly used to adjust the stress distribution of the load on the foundation and prevent stress concentration.
[0061] Further, as Figures 6 to 8 shown, the positions of the soil 18 at the steel lattice column and the soil 19 at the embedded support are pre-excavated, and then hoisted by a crane to the layout positions of the steel lattice column 11 and the embedded support 12 that have been pre-dug. Then, the angle of the steel lattice column 11 is adjusted by the rotating device 13. Then, the lower end of the steel lattice column 11 and the embedded support 12 are integrally poured, and then the upper end of the steel lattice column 11 is integrally poured to form a whole. The pre-excavation method is beneficial to improving the construction safety and ensuring the stability of the excavation working face. By pre-excavating the positions of the steel lattice column 11 and the embedded support 12 and directly hoisting the steel lattice column 11 to its position, it is possible to avoid the need to reserve a large external construction space when erecting the steel lattice column 11 from the ground, and avoid the situation that the steel lattice column 11 is likely to exceed the land use red line after being placed on the piling equipment. When designing the foundation pit enclosure, the position of the engineering pile can be considered, and each steel lattice column 11 is connected to the corresponding single embedded support 12 to avoid the position of the engineering pile, solve the problem that it is difficult to arrange the steel lattice column 11 in the area where the engineering piles are dense locally, which is beneficial to improving work efficiency and saving costs.
[0062] Further, as Figure 12As shown, the steel lattice column 11 is rectangular, and the size of the steel lattice column 11 should be controlled within the range of 450 - 600 mm to ensure the overall quality of the diagonal bracing structure. The steel lattice column 11 includes angle steel 111 and water-stop steel plate 113. Multiple connecting plates 112 are welded on the angle steel 111. The angle steel 111 and the connecting plate 112 are preferably made of Q235B type. The angle steel 111 is a long steel bar with two sides perpendicular to each other in an angular shape, and the angle steel 111 is used for bearing force. The connecting plate 112 is used to ensure the integrity and overall strength of the steel lattice column 11. The water-stop steel plate 113 is arranged on the angle steel 111. The water-stop steel plate 113 is plate-shaped and is horizontally arranged. The water-stop steel plate 113 is arranged on the basement floor slab 16. The water-stop steel plate 113 is used for waterproof isolation of the steel lattice column 11 to prevent water from entering the steel lattice column 11 and causing damage to the steel lattice column 11. The water-stop steel plate 113 is also used for strengthening and supporting the steel lattice column 11, thereby improving the service life of the steel lattice column 11.
[0063] In addition, for the steel lattice column 11, other components with strong bending resistance can also be selected, such as diagonal columns, diagonal piles, etc. It is not limited to the above embodiments, as long as it can achieve support and fixation.
[0064] Embodiment 2
[0065] The difference between this embodiment and Embodiment 1 is that, in this embodiment, as Figures 9 to 11 shown, when designing the foundation pit enclosure, the position of the engineering pile can be considered, and multiple adjacent steel lattice columns 11 are connected to the same embedded support 12, so as to avoid the position of the engineering pile, solve the problem that it is difficult to arrange the steel lattice column 11 in the area where local engineering piles are dense, which is beneficial to improving the construction efficiency and saving costs.
[0066] The above has introduced this application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand this application and its core idea. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements and modifications can still be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.
Claims
1. An oblique inner support structure for foundation pit enclosure, the oblique inner support structure (1) being arranged in a foundation pit; It is characterized in that The oblique inner support structure (1) comprises a steel lattice column (11), a rotating device (13) and a pre-embedded support (12), wherein the rotating device (13) is connected to the pre-embedded support (12), and the rotating device (13) is rotatably connected to the steel lattice column (11); The rotating device (13) is arranged on the top of the embedded support (12), and the rotating device (13) is used to adjust the connection angle between the steel lattice column (11) and the embedded support (12).
2. The oblique inner support structure for foundation pit protection according to claim 1 is characterized in that: The rotating device (13) comprises a support member (131) and a rotating assembly (132); one side of the support member (131) is fixedly connected to the embedded support (12), and the other side is rotatably connected to the rotating assembly (132); The rotating assembly (132) is connected to the steel lattice column (11).
3. The oblique inner support structure for foundation pit protection according to claim 2 is characterized in that: The rotating device (13) further comprises a supporting base (133), one side of the supporting base (133) being connected to the embedded support (12), and the other side of the supporting base (133) being fixedly connected to the supporting member (131).
4. The oblique inner support structure for foundation pit protection according to claim 2 is characterized in that: The support member (131) is provided with a slide groove (134), the rotating assembly (132) is at least partially located in the slide groove (134), and the slide groove (134) is used to guide the rotation of the rotating assembly (132).
5. The oblique inner support structure for foundation pit protection according to claim 4 is characterized in that: The rotating assembly (132) comprises a rotating rod (1322) and a fixed support plate (1321), the rotating rod (1322) is fixed to the fixed support plate (1321), and the rotating rod (1322) can slide along the sliding groove (134); One side of the fixed support plate (1321) is rotatably connected to the steel lattice column (11), and the other side is connected to the support member (131).
6. The oblique inner support structure for foundation pit protection according to claim 5 is characterized in that: The support member (131) is also provided with a fixing member (137), the fixing member (137) and the slide groove (134) are arranged at a distance, and the fixing member (137) is used to fix the fixed support plate (1321) and the support member (131).
7. The oblique inner support structure for foundation pit protection according to claim 6 is characterized in that: The slide groove (134) is arc-shaped, one end of the slide groove (134) is arranged corresponding to the fixing member (137), and the other end is arranged on the edge of the supporting member (131); There is a certain curvature between the sliding groove (134) and the fixing member (137).
8. The oblique inner support structure for foundation pit protection according to claim 5, characterized in that: The rotating rod (1322) is provided with a locking nut (136), the locking nut (136) is connected to the rotating rod (1322), and the locking nut (136) is used to lock the rotating rod (1322) relative to the support member (131).
9. The oblique inner support structure for foundation pit protection according to claim 1, characterized in that: It also includes a guard pile (15) and a top beam (14), wherein the guard pile (15) is connected to the top beam (14); The top pressure beam (14) is arranged on the top of the retaining pile (15), and the top pressure beam (14) is connected to an end of the steel lattice column (11) away from the embedded support (12).
10. The oblique inner support structure for foundation pit protection according to claim 1, characterized in that: A plurality of the steel lattice columns (11) are connected to the same embedded support (12); or, Each of the steel lattice columns (11) is connected to a corresponding single embedded support (12).