Supporting structure for basement foundation pit

Abstract

The invention relates to the field of basement foundation pits, and provides a supporting structure for a basement foundation pit, which comprises a top beam, a middle plate, a supporting assembly and an inclined strut assembly, the middle plate is formed by assembling a plurality of prefabricated plates, and the middle plate is located below the top beam and abuts against the side wall of the foundation pit. The supporting assembly comprises a bottom plate and a bottom pile, the bottom plate is arranged on the bottom wall of the foundation pit, the bottom of the bottom pile is embedded into an underground bedrock layer, and the top of the bottom pile is detachably connected with the bottom plate; the inclined strut assembly is connected with the middle plate and the bottom plate. The top beam is arranged to help maintain the foundation pit structure; the side wall of the foundation pit is surrounded by the middle plate, and the middle plate is formed by assembling a plurality of prefabricated plates on site, so that the construction period can be effectively shortened; the middle plate is connected with the bottom plate through the inclined strut assembly, and the middle plate, the inclined strut assembly and the bottom plate form a triangular supporting structure. And the bottoms of the bottom piles are embedded into the bedrock layer, so that the bottom plate can be stably supported, and the problems that a supporting structure is long in construction period and poor in supporting effect are solved.

Description

Technical Field

[0001] The present application relates to the field of basement foundation pits, and in particular to a supporting structure for basement foundation pits. Background Art

[0002] With the continuous acceleration of urbanization, underground space development has received more and more attention. At present, in the construction industry, especially in the construction of large commercial complexes and high-rise residential areas, basement foundation pit projects occupy an important position.

[0003] In order to prevent the foundation pit structure from being damaged or collapsed, it is usually necessary to set up a support structure in the foundation pit. Traditional basement foundation pit support methods mainly include soil nail walls, steel sheet piles, cement mixing piles and other forms. Although these methods can ensure the safety and stability of the foundation pit to a certain extent, they still have problems such as poor support effect and long construction period when facing soft strata, high groundwater levels and nearby buildings.

[0004] For example, when using steel sheet pile retaining structures, steel sheets need to be driven into the ground to form a continuous wall to prevent soil loss. However, driving a large number of steel sheets into the ground takes a lot of time, and when facing soft soil, the steel sheets driven into the ground may still tilt or even break, making it difficult to achieve a good support effect. Summary of the invention

[0005] In order to solve the problem of long construction period of support structure and poor support effect, the present application provides a support structure for basement foundation pit.

[0006] The present application provides a support structure for a basement foundation pit using the following technical solutions: A supporting structure for a basement foundation pit comprises: a crown beam, an intermediate plate, a supporting assembly and a diagonal bracing assembly.

[0007] The middle plate is assembled from a plurality of prefabricated plates, and the middle plate is located below the crown beam and abuts against the side wall of the foundation pit.

[0008] The support assembly includes a bottom plate and bottom piles. The bottom plate is arranged on the bottom wall of the foundation pit. The bottom of the bottom piles is embedded in the underground bedrock layer, and the top of the bottom piles is detachably connected to the bottom plate.

[0009] The diagonal bracing components are respectively connected to the middle plate and the bottom plate.

[0010] By adopting the above scheme, the construction period can be effectively shortened and the support effect can be improved.

[0011] Optionally, the prefabricated panel has a protruding portion and a recessed portion, and the protruding portion is used to be plugged into the recessed portion of other prefabricated panels.

[0012] By adopting the above solution, the splicing and assembly of prefabricated panels can be completed quickly.

[0013] Optionally, the diagonal brace assembly includes a diagonal brace rod and a connecting plate.

[0014] The connecting plate is located at the junction of the plurality of prefabricated plates and is connected to the corresponding plurality of prefabricated plates.

[0015] The diagonal bracing rod is arranged obliquely and is used to connect the connecting plate and the bottom plate.

[0016] By adopting the above solution, the diagonal bracing rods can support the junctions of multiple prefabricated panels, thereby preventing the edges of the prefabricated panels from being damaged or the multiple prefabricated panels from being separated from each other under the squeezing effect of the soil.

[0017] Optionally, there are multiple diagonal brace assemblies, and at least one connecting plate abuts against the bottom of the crown beam.

[0018] By adopting the above solution, the crown beam can limit the position of the connecting plate abutting against it, and the connecting plate abutting against the crown beam can support the crown beam.

[0019] Optionally, the diagonal brace is hinged to the connecting plate, and one end of the diagonal brace away from the connecting plate abuts against the bottom plate.

[0020] The diagonal brace assembly also includes a limiting member and a locking unit.

[0021] The limiting member is slidably connected to the bottom plate and is used to limit the end of the diagonal bracing rod away from the connecting plate.

[0022] The locking unit is connected to the limiting member and is used to lock the limiting member.

[0023] By adopting the above solution, it is ensured that the end of the diagonal bracing rod away from the connecting plate can be moved to abut against the bottom plate, so as to support the middle plate.

[0024] Optionally, a limiting groove is provided on the bottom plate, and one end of the diagonal support rod away from the connecting plate abuts against the bottom wall of the limiting groove.

[0025] By adopting the above solution, the end of the diagonal brace away from the connecting plate can be limited, ensuring that a stable triangular support structure is formed between the middle plate, the diagonal brace and the bottom plate.

[0026] Optionally, the bottom pile comprises a casting portion and at least one rock embedded member.

[0027] The casting part is plugged into the bottom plate.

[0028] The top of the rock embedded part is located in the casting part, and the bottom of the rock embedded part is embedded in the bedrock layer.

[0029] By adopting the above solution, the rock embedded parts are connected to the casting part and the bedrock layer respectively, so that the bearing capacity of the bottom pile can be effectively improved.

[0030] Optionally, at least one of the rock embedments is arranged at an incline.

[0031] By adopting the above solution, the probability of the casting part of the bottom pile being tilted can be reduced to a certain extent.

[0032] Optionally, the rock embedded part has an outer convex portion, and the outer convex portion is located at the junction of the casting portion and the bedrock layer.

[0033] By adopting the above solution, it is possible to prevent the rock embedded member from bending or breaking at the interface between the casting area and the bedrock layer.

[0034] Optionally, the bottom of the base plate is provided with gripping teeth.

[0035] By adopting the above solution, the gripping force of the bottom plate can be improved and the bottom plate can be prevented from moving laterally.

[0036] The support structure for the basement foundation pit provided by the present application helps maintain the structure of the foundation pit by setting a crown beam; it also encloses the side walls of the foundation pit by setting an intermediate plate, and the intermediate plate is assembled on-site from multiple prefabricated plates, which can effectively shorten the construction period; the intermediate plate is connected to the bottom plate through a diagonal brace assembly, and the intermediate plate, the diagonal brace assembly and the bottom plate form a triangular support structure, which can stably support the inner wall of the foundation pit; the bottom of the bottom pile is embedded in the bedrock layer, so that it can withstand a larger load, and then stably support the bottom plate, effectively solving the problems of long construction period of the support structure and poor support effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the support structure for the basement foundation pit provided in this application.

[0038] Figure 2 This application provides Figure 1 A magnified schematic diagram of center A.

[0039] Figure 3 It is a partial schematic diagram of the support structure for the basement foundation pit provided in this application.

[0040] Figure 4 It is a partial side view of the support structure for the basement foundation pit provided by the present application.

[0041] Description of reference numerals: 1. Crown beam; 2. middle plate; 21. prefabricated plate; 211. raised portion; 212. recessed portion; 3. Support assembly; 31. Bottom plate; 311. Groove; 312. Ground gripper; 313. Limiting groove; 32. Bottom pile; 321. Casting part; 322. Rock embedded part; 3221. External convex part; 4. diagonal brace assembly; 41. diagonal brace rod; 42. connecting plate; 43. connecting bolt; 44. limiter; 45. locking unit; 451. adjusting bolt; 452. mounting block; 200. Bedrock layer. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-4 This application is described in further detail.

[0043] like Figures 1 to 3 As shown, an embodiment of the present application discloses a supporting structure for a basement foundation pit, comprising: a crown beam 1, an intermediate plate 2, a supporting assembly 3 and a diagonal bracing assembly 4.

[0044] Specifically, the crown beam 1 is arranged at the top of the foundation pit and the crown beam 1 is at least partially suspended inside the foundation pit. The crown beam 1 can be prepared by casting on site. The crown beam 1 is obtained by setting a forming mold and a steel cage of the crown beam 1 at a set construction position of the crown beam 1, pouring concrete into the forming mold, and performing demoulding and curing after the concrete solidifies.

[0045] The setting of the crown beam 1 helps maintain the structural stability of the foundation pit and prevent the top of the foundation pit from collapsing. The concrete grade used in the crown beam 1 is C40 or above (compressive strength reaches 40 MPa or above); the steel grade used is not less than HRB400 (the standard value of the yield strength of the steel bar should reach or exceed 400 MPa), so that the crown beam 1 has a higher bearing capacity.

[0046] The middle plate 2 is located below the crown beam 1 and abuts against the side wall of the foundation pit. The middle plate 2 is used to support the side wall of the foundation pit, thereby maintaining the structural stability of the foundation pit. The bottom of the middle plate 2 can abut against the bottom wall of the foundation pit or be inserted into the soil below the bottom wall of the foundation pit. The middle plate 2 can be connected to the crown beam 1, such as by threaded connection, so as to support the crown beam 1.

[0047] The middle plate 2 may be made of a concrete panel made of high-performance fiber-reinforced concrete, so that the middle plate 2 has good compressive strength and durability; of course, a stainless steel plate may also be used, and the specific material is not strictly limited.

[0048] like Figure 3As shown, the middle plate 2 is assembled from a plurality of prefabricated plates 21. For example, a protrusion 211 and a recess 212 are provided on the prefabricated plate 21. The assembly of two prefabricated plates 21 can be completed by plugging the protrusion 211 of the prefabricated plate 21 into the recess 212 of other prefabricated plates 21.

[0049] The thickness of the prefabricated panels 21 is the same, but the lengths or widths of different prefabricated panels 21 are allowed to be different. Multiple prefabricated panels 21 can be used to assemble intermediate panels 2 of different areas, thereby adapting to the side walls of the foundation pit of different sizes. The dimensions of the prefabricated panels 21 can be: length: 4m, width: 2m, thickness: 20cm. After being prepared in the factory, the prefabricated panels 21 can be transported to the location of the foundation pit for on-site assembly, shortening the construction period.

[0050] like Figure 1 to Figure 2 As shown, the support assembly 3 includes a bottom plate 31 and a bottom pile 32, and the bottom plate 31 is arranged on the bottom wall of the foundation pit. The diagonal brace assembly 4 is connected to the middle plate 2 and the bottom plate 31 respectively, so that the middle plate 2, the bottom plate 31 and the diagonal brace assembly 4 can form a triangular support structure. The bottom plate 31 provides support force to the middle plate 2 through the diagonal brace assembly 4 to prevent the side wall of the foundation pit from collapsing. On the contrary, the force applied by the middle plate 2 to the bottom plate 31 through the diagonal brace assembly 4 and the gravity of the bottom plate 31 itself can act on the bottom wall of the foundation pit, thereby preventing the soil at the bottom of the foundation pit from bulging.

[0051] The bottom plate 31 can be a prefabricated concrete plate or a prefabricated stainless steel plate. The arrangement of the bottom plate 31 is equivalent to indirectly increasing the contact area between the diagonal bracing assembly 4 and the bottom of the foundation pit, thereby being able to increase the supporting force of the diagonal bracing assembly 4.

[0052] The bottom of the bottom pile 32 is embedded in the underground bedrock layer 200, so that the bottom pile 32 can bear a large load and will not move with the soft soil above the bedrock layer 200. The bottom of the bottom plate 31 is connected to the top of the bottom pile 32, so that the bottom pile 32 can provide a large supporting force for the bottom plate 31, and then provide strong support for the middle plate 2.

[0053] like Figure 1 to Figure 2 As shown, the bottom pile 32 and the bottom plate 31 can be connected in a detachable manner. For example, a groove 311 is provided below the bottom plate 31 to match the top of the bottom pile 32, and the top of the bottom pile 32 extends into the groove 311. Through the above connection method, the bottom pile 32 can limit the bottom plate 31, thereby preventing the bottom plate 31 from moving laterally. In addition, the installation and removal of the bottom plate 31 are also more convenient.

[0054] There can be multiple grooves 311 under the bottom plate 31 so as to be assembled with multiple bottom piles 32 at the same time to enhance the bearing capacity; or different grooves 311 can be assembled with corresponding bottom piles 32 to achieve adjustable position of the bottom plate 31 .

[0055] like Figure 1 to Figure 2 As shown, further, a gripping tooth 312 may be provided at the bottom of the bottom plate 31, and the gripping tooth 312 is inserted into the soil at the bottom of the foundation pit, thereby preventing the bottom plate 31 from moving. The gripping tooth 312 may be formed integrally with the bottom plate 31. In addition, the groove 311 at the bottom of the bottom plate 31 for inserting the bottom pile 32 may be constructed by a plurality of gripping teeth 312, that is, the top of the bottom pile 32 is inserted into the gap between the plurality of gripping teeth 312, and the plurality of gripping teeth 312 and the bottom pile 32 are mutually limited. This method does not require a separate groove 311 to be provided, which can save costs and production time of the bottom plate 31.

[0056] like Figure 1 and Figure 4 As shown, the diagonal brace assembly 4 includes a prefabricated diagonal brace rod 41 and a prefabricated connecting plate 42. The connecting plate 42 is located at the junction of multiple prefabricated panels 21 and is connected to the corresponding multiple prefabricated panels 21. For example, threaded holes are reserved on the connecting plate 42 and the prefabricated panels 21, and the connecting plate 42 can be threadedly connected to the multiple prefabricated panels 21 through connecting bolts 43. Further, there is at least one group of two prefabricated panels 21 plugged into each other, and the plug-in parts (protrusions 211 and recesses 212) of the two prefabricated panels 21 are connected by the same connecting bolt 43, so that the connecting bolt 43 can limit the two prefabricated panels 21 at the same time to prevent the two prefabricated panels 21 from spreading out.

[0057] The diagonal brace rod 41 is arranged obliquely and is used to connect the connecting plate 42 and the bottom plate 31. The bottom plate 31 supports the connecting plate 42 through the diagonal brace rod 41. Since the connecting plate 42 is located at the junction of multiple prefabricated panels 21, the diagonal brace rod 41 can support the edge of the prefabricated panel 21 to prevent the edge of the prefabricated panel 21 from breaking due to soil compression or the multiple prefabricated panels 21 from being disconnected. The connecting plate 42 can also increase the contact area between the diagonal brace rod 41 and the prefabricated panel 21.

[0058] The connecting plate 42 and the diagonal bracing rod 41 can both be prefabricated stainless steel parts.

[0059] The supporting structure for a basement foundation pit provided in the embodiment of the present application helps maintain the structure of the foundation pit by setting a crown beam 1; it also provides an intermediate plate 2 to enclose the side walls of the foundation pit, and the intermediate plate 2 is assembled on-site from a plurality of prefabricated plates 21, which can effectively shorten the construction period; the intermediate plate 2 is connected to the bottom plate 31 through a diagonal brace assembly 4, and the intermediate plate 2, the diagonal brace assembly 4 and the bottom plate 31 form a triangular supporting structure, which can provide stable support for the inner wall of the foundation pit; the bottom of the bottom pile 32 is embedded in the bedrock layer 200, so that it can withstand a larger load, and then provide stable support for the bottom plate 31, effectively solving the problem of long construction period of the supporting structure and poor support effect.

[0060] like Figure 1As shown, in some embodiments, there are multiple diagonal brace assemblies 4 , and at least one connecting plate 42 is in contact with the bottom of the crown beam 1 .

[0061] Specifically, the top of the middle plate 2 is in contact with the crown beam 1, and the top of the middle plate 2 is provided with a connecting plate 42. The connecting plate 42 is supported by the diagonal brace assembly 4, so that the top of the middle plate 2 can be stably supported. However, since the direction of the force exerted by the diagonal brace assembly 4 on the connecting plate 42 is inclined upward, this force has an upward component. When this upward force component is greater than the sum of the gravity of the connecting plate 42 and the friction force exerted on the connecting plate 42, the connecting plate 42 has a tendency to slide upward. By setting the connecting plate 42 to abut against the bottom of the crown beam 1, the crown beam 1 can curb the tendency of the connecting plate 42 to slide upward. In addition, the diagonal brace rod 41 and the connecting plate 42 can also provide support for the crown beam 1.

[0062] like Figure 1 to Figure 2 As shown, in some embodiments, the diagonal brace rod 41 is hinged to the connecting plate 42, and one end of the diagonal brace rod 41 away from the connecting plate 42 abuts against the bottom plate 31. The diagonal brace assembly 4 also includes a limiter 44 and a locking unit 45. The limiter 44 is slidably connected to the bottom plate 31 and is used to limit the end of the diagonal brace rod 41 away from the connecting plate 42. The locking unit 45 is connected to the limiter 44 and is used to lock the limiter 44.

[0063] Specifically, due to the errors in the excavation of the foundation pit and the production of prefabricated parts such as the diagonal brace rods 41, the prefabricated diagonal brace rods 41 may not meet the actual needs. For example, when there is a height difference between the various parts of the foundation pit bottom wall, the spacing between the connecting plate 42 and the bottom plate 31 may be different from the expected spacing. At this time, if the position for connecting with the diagonal brace rods 41 is set in advance on the bottom plate 31, the prefabricated diagonal brace rods 41 may not be connected to the preset connection positions of the connecting plate 42 and the bottom plate 31 respectively.

[0064] In response to the above problem, this embodiment sets a diagonal support rod 41 and a connecting plate 42 to be hinged, so that the position of the end of the diagonal support rod 41 away from the connecting plate 42 can be adjusted, ensuring that the end of the diagonal support rod 41 away from the connecting plate 42 can contact with the bottom plate 31. After contact, the end of the diagonal support rod 41 away from the connecting plate 42 is limited by the limiting member 44, so that the end of the diagonal support rod 41 away from the connecting plate 42 will not move relative to the bottom plate 31, ensuring that the bottom plate 31 can support the middle plate 2 through the diagonal support rod 41.

[0065] like Figure 1 and Figure 4As shown, a limiting groove 313 is provided on the bottom plate 31, and the limiting groove 313 is used to limit the position of the diagonal support rod 41. Specifically, the end of the diagonal support rod 41 away from the connecting plate 42 abuts against the bottom wall of the limiting groove 313. The sliding direction of the limiting member 44 is parallel to the extending direction of the limiting groove 313. When the position of the end of the diagonal support rod 41 away from the connecting plate 42 is adjusted to contact the bottom wall of the limiting groove 313, the limiting member 44 is moved until it abuts against the diagonal support rod 41, and then the position of the limiting member 44 is locked by the locking unit 45, so that the end of the diagonal support rod 41 away from the connecting plate 42 can be prevented from moving.

[0066] like Figure 1 to Figure 2 As shown, the locking assembly includes an adjusting bolt 451 and a mounting block 452, the mounting block 452 is arranged on the bottom plate 31, the adjusting bolt 451 is arranged along the extension direction of the limiting groove 313, the adjusting bolt 451 is threadedly connected to the mounting block 452, and the adjusting bolt 451 is rotatably connected to the limiting member 44. By screwing the adjusting bolt 451, the limiting member 44 can be driven to move.

[0067] In addition, based on the solution of this embodiment, the placement of the bottom plate 31 during actual construction will be more flexible. Even if there is a deviation in the horizontal or vertical direction between the actual placement position of the bottom plate 31 and the preset placement position, the diagonal brace rod 41 can still abut against different parts of the bottom plate 31 to play a supporting role. Personnel can select the placement position of the bottom plate 31 according to actual needs. For example, by making the bottom plate 31 as close to the middle plate 2 as possible, the bottom plate 31 can be kept away from the middle of the foundation pit to avoid occupying more basement construction space.

[0068] like Figure 1 to Figure 2 As shown, in some embodiments, the bottom pile 32 includes a casting part 321 and at least one rock-embedded member 322. The casting part 321 is plugged into the bottom plate 31. The top of the rock-embedded member 322 is located in the casting part 321, and the bottom thereof is embedded in the bedrock layer 200.

[0069] Specifically, when constructing the bottom pile 32, first dig downward from the bottom of the foundation pit, stop digging when digging to the bedrock layer 200, and obtain a casting hole for setting the casting part 321; then use a drilling device to drill a hole in the bedrock layer 200 to obtain a bedrock hole; then put the bottom of the rock-embedded member 322 into the bedrock hole of the bedrock layer 200, and then pour cement slurry into the bedrock hole to repair the bedrock cracks and stabilize the rock-embedded member 322; finally, place a steel cage in the casting hole and pour concrete to complete the preparation of the bottom pile 32. Among them, the rock-embedded member 322 is connected to the casting part 321 and the bedrock layer 200 respectively, so that the bearing capacity of the bottom pile 32 can be effectively improved.

[0070] Furthermore, at least part of the rock-embedded member 322 is located inside the steel cage in the casting portion 321 and contacts the steel cage, so that the rock-embedded member 322 can limit the steel cage and prevent the steel cage from being deformed.

[0071] The rock embedded member 322 may be a steel bar or a stainless steel pipe.

[0072] like Figure 1 to Figure 2 As shown, further, at least one rock-embedded member 322 is arranged obliquely. That is, an inclined bedrock hole is drilled on the bedrock layer 200, and then the rock-embedded member 322 is obliquely inserted into the bedrock hole, and finally the casting part 321 is constructed. By setting the inclined rock-embedded member 322, the lateral pressure resistance of the bottom pile 32 can be increased, and the probability of the casting part 321 of the bottom pile 32 being inclined can be reduced to a certain extent.

[0073] like Figure 1 to Figure 2 As shown, further, the rock-embedded member 322 has an outer protrusion 3221, and the outer protrusion 3221 is located at the junction of the casting portion 321 and the bedrock layer 200. The width or diameter of the outer protrusion 3221 is greater than the width or diameter of other parts of the rock-embedded member 322, so that the compressive strength of the outer protrusion 3221 is greater than the compressive strength of other parts of the rock-embedded member 322. By providing the outer protrusion 3221 at the junction of the casting portion 321 and the bedrock layer 200, the rock-embedded member 322 can be prevented from bending or breaking at the junction of the casting portion 321 and the bedrock layer 200. In addition, the provision of the outer protrusion 3221 can increase the contact area between the rock-embedded member 322 and the cement slurry and concrete, thereby improving the connection strength.

Claims

1. A supporting structure for a basement foundation pit, characterized in that: include: Crown beam (1); An intermediate plate (2) is assembled from a plurality of prefabricated plates (21), the intermediate plate (2) being located below the crown beam (1) and abutting against the side wall of the foundation pit; A support assembly (3) comprising a bottom plate (31) and bottom piles (32), wherein the bottom plate (31) is arranged on the bottom wall of the foundation pit, the bottom of the bottom piles (32) is embedded in the underground bedrock layer (200), and the top of the bottom piles (32) is detachably connected to the bottom plate (31); A diagonal brace assembly (4) connected to the middle plate (2) and the bottom plate (31) respectively; The diagonal brace assembly (4) comprises a diagonal brace rod (41) and a connecting plate (42); The connecting plate (42) is located at the junction of the plurality of prefabricated plates (21) and is connected to the corresponding plurality of prefabricated plates (21); The diagonal brace (41) is arranged obliquely and is used to connect the connecting plate (42) and the bottom plate (31). The number of the diagonal brace assemblies (4) is plural, and at least one of the connecting plates (42) is in contact with the bottom of the crown beam (1); The diagonal brace rod (41) is hingedly connected to the connecting plate (42), and one end of the diagonal brace rod (41) away from the connecting plate (42) abuts against the bottom plate (31); The diagonal brace assembly (4) further comprises a limiting member (44) and a locking unit (45); The limiting member (44) is slidably connected to the bottom plate (31) and is used to limit the position of one end of the diagonal support rod (41) away from the connecting plate (42); The locking unit (45) is connected to the limiting member (44) and is used to lock the limiting member (44).

2. The supporting structure for a basement foundation pit according to claim 1, characterized in that: The prefabricated plate (21) has a protruding portion (211) and a recessed portion (212); the protruding portion (211) is used for plugging with the recessed portion (212) of another prefabricated plate (21).

3. The supporting structure for a basement foundation pit according to claim 1, characterized in that: The bottom plate (31) is provided with a limiting groove (313), and one end of the diagonal support rod (41) away from the connecting plate (42) abuts against the bottom wall of the limiting groove (313).

4. The supporting structure for a basement foundation pit according to claim 1, characterized in that: The bottom pile (32) comprises a casting portion (321) and at least one rock embedded member (322); The casting portion (321) is plugged into the bottom plate (31); The top of the rock embedded part (322) is located in the casting part (321), and the bottom of the rock embedded part (322) is embedded in the bedrock layer (200).

5. The supporting structure for basement foundation pit according to claim 4, characterized in that: At least one of the rock embedded parts (322) is arranged obliquely.

6. The supporting structure for a basement foundation pit according to claim 4, characterized in that: The rock embedded part (322) has an outer convex portion (3221), and the outer convex portion (3221) is located at the junction of the casting portion (321) and the bedrock layer (200).

7. The supporting structure for a basement foundation pit according to claim 1, characterized in that: The bottom of the bottom plate (31) is provided with ground grabbing teeth (312).

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