Foundation pit reinforcing structure

Abstract

The utility model relates to the field of foundation pit reinforcement, and particularly discloses a foundation pit reinforcement structure which comprises a supporting structure, a backfill back pressure belt and an inclined strut structure, and the supporting structure is arranged in a foundation pit and used for supporting the pit wall of the foundation pit; the backfill back pressure zone is used for being arranged around the pit bottom of the foundation pit; the first end of the inclined strut structure is installed on the pit bottom, and the second end is connected with the supporting structure and used for reinforcing the supporting structure. The stability of the foundation pit is improved.

Description

Technical Field

[0001] This application relates to the field of foundation pit reinforcement, and particularly to a foundation pit reinforcement structure. Background Art

[0002] At present, with the continuous development of underground space, more and more foundation pit projects have emerged. Currently, it is becoming more and more common for the excavation depth of foundation pit projects to reach 20 - 30m. Therefore, the reinforcement of foundation pits has become an important issue that needs to be considered at present.

[0003] In the related art, support piles are set at the pit wall of the foundation pit to support the pit wall.

[0004] For the above - mentioned related art, there are the following defects: when setting the support piles, the closer to the bottom of the foundation pit, the greater the pressure borne by the support piles. The support piles near the bottom of the pit are prone to excessive deformation, the deformation rate is greater than the warning value, or the support piles crack, making it difficult to effectively support the foundation pit. Utility Model Content

[0005] In order to improve the stability of the foundation pit, this application provides a foundation pit reinforcement structure.

[0006] The foundation pit reinforcement structure provided by this application adopts the following technical solution:

[0007] A foundation pit reinforcement structure includes a support structure, a backfill and counter - pressure belt, and a diagonal bracing structure. The support structure is arranged in the foundation pit and is used to support the pit wall of the foundation pit;

[0008] The backfill and counter - pressure belt is used to be arranged around the bottom of the foundation pit;

[0009] The first end of the diagonal bracing structure is used to be installed on the bottom of the pit, and the second end is connected to the support structure to reinforce the support structure.

[0010] By adopting the above - mentioned technical solution, by arranging a support mechanism in the foundation pit to support the pit wall of the foundation pit, arranging a backfill and counter - pressure belt around the bottom of the foundation pit, and reinforcing the support mechanism through a diagonal bracing mechanism, the support effect of the support mechanism on the pit wall is improved, and thus the stability of the foundation pit is improved.

[0011] Optionally, the foundation pit reinforcement structure further includes an intermediate bottom plate. The intermediate bottom plate is used to be installed on the bottom of the pit and is located on the side of the backfill and counter - pressure belt away from the pit wall;

[0012] The intermediate bottom plate is located below the diagonal bracing structure and is connected to the first end of the diagonal bracing structure.

[0013] By adopting the above technical solution, the soil layer at the bottom of the foundation pit has low strength, is prone to deformation, and it is difficult to directly and stably support the inclined strut structure. The foundation pit will be built into a basement later, and the middle floor slab serves as the floor slab in the middle of the basement. By utilizing the middle floor slab, that is, by using the foundation structure of the basement itself to reinforce the inclined strut structure, the first end of the inclined strut structure can be stably supported on the bottom of the pit. And after the construction of the inclined strut structure is completed, the backfill and counterpressure belt can be dug away, and the outer floor slab can be constructed outside the middle floor slab to seal the entire floor slab of the basement.

[0014] Optionally, the support structure includes a plurality of support piles, the support piles are vertically inserted into the bottom of the pit and are in contact with the pit wall;

[0015] The plurality of support piles are spaced apart along the circumference of the bottom of the pit;

[0016] The second end of the inclined strut structure is connected to the support pile.

[0017] By adopting the above technical solution, the support piles are used to support the pit wall, and the inclined strut mechanism is used to support the support piles to improve the stability of the support piles.

[0018] Optionally, the support structure further includes a support waist beam, the support waist beam is arranged inside the plurality of support piles and is connected to the plurality of support piles;

[0019] The second end of the inclined strut structure is connected to the support pile.

[0020] By adopting the above technical solution, the waist beam can connect the plurality of support piles, improve the integrity between the support piles, and further improve the support effect of the support mechanism on the pit wall.

[0021] Optionally, the inclined strut structure includes an inclined strut waist beam, a corbel and an inclined strut assembly, the corbel is installed on the middle floor slab;

[0022] The inclined strut waist beam is arranged inside the plurality of support piles, located above the corbel, and is connected to the plurality of support piles;

[0023] The inclined strut assembly includes an inclined strut, one end of the inclined strut is connected to the corbel, and the other end is connected to the inclined strut waist beam.

[0024] By adopting the above technical solution, the corbel is used to connect one end of the inclined strut to the middle floor slab, and the inclined strut waist beam is used to connect the other end of the inclined strut to the support pile. At the same time, the inclined strut waist beam can further improve the integrity between the support piles, and through the inclined strut waist beam, the inclined strut can reinforce the plurality of support piles.

[0025] Optionally, one end of the inclined strut is welded to the corbel, and the other end is welded to the inclined strut waist beam.

[0026] By adopting the above technical solution, a relatively high connection strength is achieved between the inclined support, the bracket, and the inclined waist beam.

[0027] Optionally, one end of the inclined support is hinged to the bracket, and the other end is hinged to the inclined waist beam.

[0028] By adopting the above technical solution, during the actual construction process, the bracket can be first connected to the middle bottom plate, then one end of the inclined support is hinged to the bracket, and the other end is hinged to the inclined waist beam. After that, by pressing down the inclined waist beam, the inclined waist beam can effectively and firmly resist the retaining piles, and then the inclined waist beam is connected to the retaining piles. Or first connect the inclined waist beam to the retaining piles, then hinge one end of the inclined support to the bracket, and the other end to the inclined waist beam. After that, by pressing down the bracket, the bracket can effectively and firmly resist the middle bottom plate, and then the bracket is connected to the middle bottom plate. Thus, the fault tolerance during the installation of the inclined support can be improved, and the construction efficiency of the inclined support can be increased.

[0029] Optionally, the inclined support structure includes an inclined waist beam, a bracket, and an inclined support assembly. The bracket is installed on the middle bottom plate;

[0030] The inclined waist beam is arranged inside multiple retaining piles and is located above the bracket and is connected to the multiple retaining piles;

[0031] The inclined support assembly includes a hydraulic cylinder. One end of the hydraulic cylinder is connected to the bracket, and the other end is connected to the inclined waist beam.

[0032] By adopting the above technical solution, the bracket is used to connect one end of the hydraulic cylinder to the middle bottom plate, and the inclined waist beam is used to connect the other end of the hydraulic cylinder to the retaining piles. At the same time, the inclined waist beam can further improve the integrity between the retaining piles, and through the inclined waist beam, the hydraulic cylinder can reinforce multiple retaining piles. The hydraulic cylinder can further reinforce multiple retaining piles by extending.

[0033] Optionally, one end of the hydraulic cylinder is welded to the bracket, and the other end is welded to the inclined waist beam.

[0034] By adopting the above technical solution, a relatively high connection strength is achieved between the hydraulic cylinder, the bracket, and the inclined waist beam.

[0035] Optionally, one end of the hydraulic cylinder is hinged to the bracket, and the other end is hinged to the inclined waist beam.

[0036] By adopting the above technical solutions, during the actual construction process, the bracket can be first connected to the middle bottom plate, and then one end of the hydraulic cylinder is hinged to the bracket, and the other end is hinged to the inclined bracing beam. After that, by pressing down the inclined bracing beam, the inclined bracing beam can effectively and firmly resist the retaining pile, and then the inclined bracing beam is connected to the retaining pile. Or first connect the inclined bracing beam to the retaining pile, then hinge one end of the hydraulic cylinder to the bracket and the other end to the inclined bracing beam, and then press down the bracket. In this way, the bracket can effectively and firmly resist the middle bottom plate, and then the bracket is connected to the middle bottom plate. Furthermore, the fault tolerance during the installation of the hydraulic cylinder can be improved, and the construction efficiency of the hydraulic cylinder can be increased.

[0037] In summary, the present application includes at least one of the following beneficial technical effects:

[0038] 1. In the present application, by arranging a retaining structure in the foundation pit to support the pit wall of the foundation pit, a backfill and counter-pressure belt is arranged around the bottom of the foundation pit, and the retaining structure is reinforced by an inclined bracing structure, so that the retaining effect of the retaining structure on the pit wall is improved, and thus the stability of the foundation pit is improved.

[0039] 2. In the present application, by hinging the two ends of the inclined bracing component to the bracket and the inclined bracing beam respectively, the fault tolerance performance during the installation of the inclined bracing component is improved, and the installation efficiency of the inclined bracing component is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0042] Figure 2 is the sectional structural schematic diagram of the embodiment of the present application;

[0043] Figure 3 is the schematic diagram of the first embodiment of the inclined bracing structure;

[0044] Figure 4 is the schematic diagram of the second embodiment of the inclined bracing structure;

[0045] Reference Signs:

[0046] 1. Foundation pit; 11. Pit bottom; 12. Pit wall; 2. Support structure; 21. Support piles; 22. Support waist beam; 3. Diagonal bracing structure; 31. Corbel; 32. Diagonal bracing waist beam; 33. Diagonal bracing assembly; 331. First hinge; 332. Second hinge; 333. Diagonal support; 334. Hydraulic cylinder; 4. Backfill counter-pressure belt; 5. Middle bottom plate; 50. Outer ring bottom plate; 6. Post-casting belt. DETAILED DESCRIPTION

[0047] The following is combined with Figures 1-4 This application is described in further detail.

[0048] Embodiment 1

[0049] Reference Figure 1 and Figure 2 A foundation pit reinforcement structure includes a supporting structure 2, a backfill counterpressure belt 4 and a diagonal bracing structure 3. The supporting structure 2 is arranged in a foundation pit 1, and is used to support a pit wall 12 of the foundation pit 1, and surrounds the pit wall 12. The backfill counterpressure belt 4 is used to be arranged around the pit bottom 11 of the foundation pit 1. The first end of the diagonal bracing structure 3 is used to be installed on the pit bottom 11, and the second end is connected to the supporting structure 2, and is used to reinforce the supporting structure 2.

[0050] Reference Figure 1 and Figure 2 In the embodiment of the present application, a supporting mechanism is arranged in the foundation pit 1 to support the pit wall 12 of the foundation pit 1, a backfill counter-pressure belt 4 is arranged around the pit bottom 11 of the foundation pit 1, and the supporting mechanism is reinforced by a diagonal bracing mechanism, thereby improving the supporting effect of the supporting mechanism on the pit wall 12, thereby improving the stability of the foundation pit 1.

[0051] Reference Figure 1 and Figure 2 The foundation pit reinforcement structure also includes an intermediate bottom plate 5, which is used to be installed on the pit bottom 11 and is located on the side of the backfill counterpressure belt 4 away from the pit wall 12. The intermediate bottom plate 5 is located below the diagonal support structure 3 and is connected to the first end of the diagonal support structure 3. When the intermediate bottom plate 5 is set, a post-casting belt 6 is provided between the intermediate bottom plate 5 and the backfill counterpressure belt.

[0052] Reference Figure 1 and Figure 2 In the embodiment of the present application, the soil layer at the bottom 11 of the foundation pit 1 has low strength and is easily deformed, making it difficult to directly and stably support the diagonal bracing structure 3. The foundation pit 1 will be built into a basement later, and the middle floor 5 is used as the floor in the middle of the basement. The diagonal bracing structure 3 is reinforced by the middle floor 5, that is, by using the foundation structure of the basement itself, so that the first end of the diagonal bracing structure 3 can be stably supported on the bottom 11 of the pit. After the construction of the diagonal bracing structure 3 is completed, the backfill back pressure belt 4 can be dug away, and the outer ring floor 50 can be constructed on the outside of the middle floor 5 to seal the entire floor of the basement.

[0053] Refer to Figure 1 and Figure 2 The support structure 2 includes a support girt 22 and a plurality of support piles 21. The support piles 21 are vertically inserted into the bottom 11 of the pit and are in contact with the pit wall 12. The plurality of support piles 21 are spaced apart along the circumference of the bottom 11 of the pit. The second end of the diagonal bracing structure 3 is connected to the support pile 21. The support girt 22 is arranged inside the plurality of support piles 21 and is connected to the plurality of support piles 21. The second end of the diagonal bracing structure 3 is connected to the support pile 21

[0054] Refer to Figure 1 and Figure 2 In the embodiment of the present application, the support pile 21 is used to support the pit wall 12, and the diagonal bracing mechanism is used to support the support pile 21 to improve the stability of the support pile 21. The girt can connect the plurality of support piles 21 to improve the integrity between the support piles 21, and further improve the support effect of the support mechanism on the pit wall 12

[0055] Refer to Figure 1 、 Figure 2 and Figure 3 The diagonal bracing structure 3 includes a diagonal bracing girt 32, a corbel 31 and a diagonal bracing assembly 33. The corbel 31 is installed on the middle floor slab 5. The diagonal bracing girt 32 is arranged inside the plurality of support piles 21, above the corbel 31, and is connected to the plurality of support piles 21. The diagonal bracing assembly 33 includes a diagonal bracing 333. One end of the diagonal bracing 333 is connected to the corbel 31, and the other end is connected to the diagonal bracing girt 32

[0056] Refer to Figure 1 、 Figure 2 and Figure 3 In the embodiment of the present application, the corbel 31 is used to connect one end of the diagonal bracing 333 to the middle floor slab 5, and the diagonal bracing girt 32 is used to connect the other end of the diagonal bracing 333 to the support pile 21. At the same time, the diagonal bracing girt 32 can further improve the integrity between the support piles 21, and through the diagonal bracing girt 32, the diagonal bracing 333 can reinforce the plurality of support piles 21

[0057] Refer to Figure 1 、 Figure 2 and Figure 3 In the embodiment of the present application, one end of the diagonal bracing 333 is welded to the corbel 31, and the other end is welded to the diagonal bracing girt 32. So that the connection strength between the diagonal bracing 333 and the corbel 31 and the diagonal bracing girt 32 is relatively high

[0058] Refer to Figure 1 、 Figure 2 and Figure 3, in other embodiments, one end of the inclined support 333 is hinged to the bracket 31, and the other end is hinged to the inclined lumbar beam 32. In the embodiment of the present application, during the actual construction process, the bracket 31 can be first connected to the middle bottom plate 5, and then one end of the inclined support 333 is hinged to the bracket 31, and the other end is hinged to the inclined lumbar beam 32. Then, by pressing down the inclined lumbar beam 32, the inclined lumbar beam 32 can effectively and firmly resist the retaining pile 21, and then the inclined lumbar beam 32 is connected to the retaining pile 21. Or first connect the inclined lumbar beam 32 to the retaining pile 21, and then hinge one end of the inclined support 333 to the bracket 31 and the other end to the inclined lumbar beam 32. Then, by pressing down the bracket 31, the bracket 31 can effectively and firmly resist the middle bottom plate 5, and then the bracket 31 is connected to the middle bottom plate 5. Furthermore, the fault tolerance during the installation of the inclined support 333 can be improved, and the construction efficiency of the inclined support 333 can be increased.

[0059] The implementation principle of a foundation pit reinforcement structure in an embodiment of the present application is as follows:

[0060] A retaining structure 2 is arranged in the foundation pit 1 to support the pit wall 12 of the foundation pit 1 and preliminarily support the foundation pit 1. A middle bottom plate 5 is arranged in the middle of the bottom 11 of the foundation pit 1, and a post-cast strip 6 is arranged on the outer edge of the middle bottom plate 5.

[0061] When the foundation pit 1 needs to be reinforced, first, a backfill and counter-pressure belt 4 is arranged, and the backfill and counter-pressure belt 4 presses against the retaining structure 2 towards the pit wall 12 of the foundation pit 1 to reinforce the retaining structure 2 and make the retaining structure 2 not easily deformed.

[0062] Then, an inclined support structure 3 is arranged. One end of the inclined support 333 is connected to the middle bottom plate 5 through the bracket 31, and the other end is connected to the retaining structure 2 through the inclined lumbar beam 32 to further reinforce the retaining structure 2.

[0063] Embodiment Two

[0064] Refer to Figure 1 , Figure 2 and Figure 4 , the difference between Embodiment Two and Embodiment One is that the inclined support structure 3 includes an inclined lumbar beam 32, a bracket 31, and an inclined support assembly 33. The bracket 31 is installed on the middle bottom plate 5. The inclined lumbar beam 32 is arranged inside multiple retaining piles 21 and above the bracket 31 and is connected to the multiple retaining piles 21. The inclined support assembly 33 includes a hydraulic cylinder 334. One end of the hydraulic cylinder 334 is connected to the bracket 31, and the other end is connected to the inclined lumbar beam 32.

[0065] Refer to Figure 1 , Figure 2 and Figure 4, in the embodiment of the present application, the bracket 31 is used to connect one end of the hydraulic cylinder 334 to the middle bottom plate 5, and the inclined bracing beam 32 is used to connect the other end of the hydraulic cylinder 334 to the retaining pile 21. At the same time, the inclined bracing beam 32 can further improve the integrity between the retaining piles 21, and through the inclined bracing beam 32, the hydraulic cylinder 334 can reinforce multiple retaining piles 21. The hydraulic cylinder 334 can further reinforce multiple retaining piles 21 by extending.

[0066] Referring to Figure 1 , Figure 2 and Figure 4 , in the embodiment of the present application, one end of the hydraulic cylinder 334 is welded to the bracket 31, and the other end is welded to the inclined bracing beam 32. In the embodiment of the present application, a relatively high connection strength is achieved between the hydraulic cylinder 334, the bracket 31, and the inclined bracing beam 32.

[0067] Referring to Figure 1 , Figure 2 and Figure 4 , in other embodiments, one end of the hydraulic cylinder 334 is hinged to the bracket 31, and the other end is hinged to the inclined bracing beam 32. In the embodiment of the present application, during the actual construction process, the bracket 31 can be first connected to the middle bottom plate 5, then one end of the hydraulic cylinder 334 is hinged to the bracket 31, and the other end is hinged to the inclined bracing beam 32. After that, by pressing down the inclined bracing beam 32, the inclined bracing beam 32 can effectively and firmly resist the retaining pile 21, and then the inclined bracing beam 32 is connected to the retaining pile 21. Or the inclined bracing beam 32 is first connected to the retaining pile 21, then one end of the hydraulic cylinder 334 is hinged to the bracket 31, and the other end is hinged to the inclined bracing beam 32. After that, by pressing down the bracket 31, the bracket 31 can effectively and firmly resist the middle bottom plate 5, and then the bracket 31 is connected to the middle bottom plate 5. Thus, the fault tolerance during the installation of the hydraulic cylinder 334 can be improved, and the construction efficiency of the hydraulic cylinder 334 can be increased.

[0068] The implementation principle of the foundation pit reinforcement structure in the second embodiment of the present application is as follows:

[0069] A support structure 2 is arranged in the foundation pit 1 to support the pit wall 12 of the foundation pit 1, and the foundation pit 1 is preliminarily supported. A middle bottom plate 5 is arranged in the middle of the bottom 11 of the foundation pit 1, and a post-cast strip 6 is arranged along the outer edge of the middle bottom plate 5.

[0070] When the foundation pit 1 needs to be reinforced, first set the backfill and counterpressure zone 4. The backfill and counterpressure zone 4 presses against the support structure 2 towards the pit wall 12 of the foundation pit 1 to reinforce the support structure 2 and make the support structure 2 not easily deformed.

[0071] Then, the diagonal bracing structure 3 is set up. One end of the hydraulic cylinder 334 is connected to the middle bottom plate 5 through the bracket 31, and the other end is connected to the support structure 2 through the diagonal bracing beam 32 to further reinforce the support structure 2. The hydraulic cylinder 334 is appropriately extended to further reinforce the support structure 2.

[0072] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings as understood by those of ordinary skill in the field to which this application pertains. The terms "first", "second", "third" and similar terms used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "a" or "an" do not denote a limitation of quantity, but mean that there is at least one. The terms such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms such as "upper", "lower", "left" and "right" are only used to indicate the relative positional relationship, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0073] The above are all optional embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. A foundation pit reinforcement structure, characterized in that: It comprises a supporting structure (2), a backfill anti-pressure belt (4) and a diagonal bracing structure (3), wherein the supporting structure (2) is arranged in a foundation pit (1) and is used to support a pit wall (12) of the foundation pit (1); The backfill counter-pressure belt (4) is used to be arranged around the pit bottom (11) of the foundation pit (1); The first end of the diagonal bracing structure (3) is used to be installed on the pit bottom (11), and the second end is connected to the supporting structure (2) to reinforce the supporting structure (2).

2. A foundation pit reinforcement structure according to claim 1, characterized in that: The foundation pit reinforcement structure further comprises an intermediate bottom plate (5), wherein the intermediate bottom plate (5) is used to be installed on the pit bottom (11) and is located on a side of the backfill counter-pressure belt (4) away from the pit wall (12); The middle bottom plate (5) is located below the diagonal bracing structure (3) and is connected to the first end of the diagonal bracing structure (3).

3. A foundation pit reinforcement structure according to claim 2, characterized in that: The support structure (2) comprises a plurality of support piles (21), wherein the support piles (21) are vertically inserted into the pit bottom (11) and are in contact with the pit wall (12); A plurality of the support piles (21) are distributed at intervals along the circumference of the pit bottom (11); The second end of the diagonal bracing structure (3) is connected to the supporting pile (21).

4. A foundation pit reinforcement structure according to claim 3, characterized in that: The support structure (2) further comprises a support waist beam (22), wherein the support waist beam (22) is arranged inside the plurality of support piles (21) and is connected to the plurality of support piles (21).

5. A foundation pit reinforcement structure according to claim 4, characterized in that: The diagonal bracing structure (3) comprises a diagonal bracing waist beam (32), a corbel (31) and a diagonal bracing assembly (33), wherein the corbel (31) is mounted on the middle bottom plate (5); The oblique supporting beam (32) is arranged inside the plurality of supporting piles (21), is located above the corbel (31), and is connected to the plurality of supporting piles (21); The diagonal support assembly (33) comprises a diagonal support (333), one end of the diagonal support (333) is connected to the corbel (31), and the other end is connected to the diagonal support waist beam (32).

6. A foundation pit reinforcement structure according to claim 5, characterized in that: One end of the oblique support (333) is welded to the corbel (31), and the other end is welded to the oblique support waist beam (32).

7. The foundation pit reinforcement structure according to claim 5, characterized in that: One end of the oblique support (333) is hinged to the corbel (31), and the other end is hinged to the oblique support waist beam (32).

8. The foundation pit reinforcement structure according to claim 6, characterized in that: The diagonal bracing assembly (33) comprises a hydraulic cylinder (334), one end of the hydraulic cylinder (334) being connected to the corbel (31), and the other end of the hydraulic cylinder (334) being connected to the diagonal bracing waist beam (32).

9. A foundation pit reinforcement structure according to claim 8, characterized in that: One end of the hydraulic cylinder (334) is welded to the bracket (31), and the other end is welded to the diagonal waist beam (32).

10. The foundation pit reinforcement structure according to claim 8, characterized in that: One end of the hydraulic cylinder (334) is hinged to the bracket (31), and the other end is hinged to the diagonal waist beam (32).

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