A diagonal bracing structure for a foundation pit support

Abstract

The utility model relates to a kind of inclined strut structure for foundation pit support, belong to construction engineering field.The utility model solves the technical problem that the setting of steel inclined strut can lead to low construction efficiency when construction in limited narrow space.A kind of inclined strut structure for foundation pit support, it includes pipe pile, crown beam, inclined support, support pier, floor and support plate replacement;Pipe pile is set in the side wall of foundation pit along vertical direction, crown beam is set in the top of pipe pile, support plate replacement is set on the inner wall of pipe pile along transverse direction, and support plate replacement is against the outside of floor;Floor includes bottom plate and layer plate, which are set along transverse direction, and reserved hole is formed in the middle of layer plate, bottom plate is set on the top surface of foundation pit, support pier is set on the top surface of bottom plate, support face is set on the side of support pier, one end of inclined support is against support face, inclined support passes through reserved hole, and the other end of inclined support is against the inner side of crown beam.Effective space is saved, which provides convenience for narrow space construction, and then improves construction efficiency.The utility model is used for foundation pit support.

Description

Technical Field

[0001] This utility model relates to a diagonal bracing structure for foundation pit support, belonging to the field of building engineering. Background Technology

[0002] Currently, many engineering projects encounter complex geological formations during construction. Failure to address these complex formations promptly and scientifically can significantly impact the overall construction quality. Therefore, in the actual construction process involving complex formations, construction units need to combine construction specifications with the characteristics of the complex strata, employing appropriate pile foundation and foundation pit support methods to effectively improve the stability and strength of the entire project. For engineering construction, pile foundation engineering is an indispensable part; its construction quality directly affects the safety and stability of the superstructure and, to a large extent, the service life of the entire project.

[0003] When using steel diagonal bracing within the excavation pit to bear the horizontal lateral force of the support, problems arise when constructing in confined spaces. This can lead to insufficient space within the pit, inefficient use of space, and consequently, low construction efficiency and slow progress.

[0004] In summary, the use of steel diagonal bracing in construction within limited, confined spaces can lead to technical problems such as low construction efficiency. Utility Model Content

[0005] This utility model aims to solve the technical problem that the installation of steel diagonal bracing leads to low construction efficiency when constructing in a limited and narrow space. Therefore, it provides a diagonal bracing structure for foundation pit support, which includes pipe piles, capping beams, diagonal bracing, support piers, floor slabs, and replacement support plates.

[0006] The pipe piles are set vertically on the side wall of the foundation pit, the capping beam is set on the top of the pipe piles, and the replacement support plate is set horizontally on the inner wall of the pipe piles, with the replacement support plate abutting against the outer side of the floor slab.

[0007] The floor slab includes a base slab and a floor slab, both arranged horizontally. A reserved hole is opened in the middle of the floor slab. The base slab is set on the top surface of the foundation pit. The support pier is set on the top surface of the base slab. A support surface is set on one side of the support pier. One end of the inclined support abuts against the support surface. The inclined support passes through the reserved hole. The other end of the inclined support abuts against the inner side of the cap beam.

[0008] As another improvement of this utility model, it also includes a triaxial mixing pile and a passive zone mixing pile. The triaxial mixing pile is set on the outside of the pipe pile, the passive zone mixing pile is set on the inside of the pipe pile, and the bottom plate is set on the top surface of the passive zone mixing pile.

[0009] As another improvement of this utility model, backfill soil is provided on the outside of the floor slab.

[0010] As another improvement of this utility model, the backfill soil is cohesive soil or stone powder.

[0011] As another improvement of this utility model, the cap beam includes a first embedded bar and a first embedded steel plate. One end of the first embedded bar is tied to the reinforcing bar of the cap beam, the first embedded steel plate is set on the inner side of the cap beam, and the other end of the first embedded bar is welded to the surface of the first embedded steel plate.

[0012] As another improvement of this utility model, the support pier includes a second embedded bar and a second embedded steel plate. One end of the second embedded bar is tied to the reinforcing bar of the support pier, the second embedded steel plate is set on the support surface of the support pier, and the other end of the second embedded bar is welded to the surface of the second embedded steel plate.

[0013] As another improvement of this utility model, the inner side of the crown beam is parallel to the support surface of the support pier.

[0014] As another improvement of this utility model, it also includes a replacement concrete block, the inner side of which abuts against the base plate, the outer side of which abuts against the pipe pile, and the thickness of the replacement concrete block is the same as the thickness of the base plate.

[0015] As another improvement of this utility model, the concrete type in the replacement support concrete block is the same as that in the floor slab.

[0016] As another improvement of this utility model, the concrete type in the replacement support concrete block is C30.

[0017] The beneficial effects of this utility model are:

[0018] 1. The shelf of this utility model has a reserved hole in the middle, the bottom plate is set on the top surface of the foundation pit, the support pier is set on the top surface of the bottom plate, the support pier has a support surface on one side, one end of the inclined support abuts against the support surface, the inclined support passes through the reserved hole, and the other end of the inclined support abuts against the inner side of the cap beam. The reserved hole of the shelf is constructed at the intersection of the inclined support and the shelf, which effectively saves space, provides convenience for construction in narrow spaces, and thus improves construction efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a diagonal bracing structure for foundation pit support according to this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the diagonal bracing structure for foundation pit support after the diagonal bracing has been removed.

[0021] Figure 3 This is a schematic diagram of the reinforcement details for the cap beam.

[0022] Figure 4 This is a schematic diagram of the reinforcement details for the supporting pier. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] Specific implementation method one: Combining Figures 1 to 4 This embodiment describes a diagonal bracing structure for foundation pit support, which includes pipe piles 1, capping beams 2, diagonal bracing 3, support piers 4, floor slabs, and replacement support plates 5;

[0025] Pipe pile 1 is set vertically on the side wall of the foundation pit, capping beam 2 is set on the top of pipe pile 1, and replacement support plate 5 is set horizontally on the inner wall of pipe pile 1, with replacement support plate 5 abutting against the outer side of the floor slab.

[0026] The floor slab includes a base slab 6 and a floor slab 7, both arranged horizontally. A reserved hole is provided in the middle of the floor slab 7. The base slab 6 is set on the top surface of the foundation pit. The support pier 4 is set on the top surface of the base slab 6. A support surface is provided on one side of the support pier 4. One end of the inclined support 3 abuts against the support surface. The inclined support 3 passes through the reserved hole. The other end of the inclined support 3 abuts against the inner side of the cap beam 2.

[0027] A pre-reserved hole is provided in the middle of the slab. The bottom slab is placed on the top surface of the foundation pit, and the support pier is placed on the top surface of the bottom slab. A support surface is provided on one side of the support pier. One end of the inclined support abuts against the support surface. The inclined support passes through the pre-reserved hole, and the other end of the inclined support abuts against the inner side of the cap beam. The pre-reserved hole of the slab is constructed at the intersection of the inclined support and the slab, which effectively saves space, provides convenience for construction in narrow spaces, and thus improves construction efficiency.

[0028] Specific Implementation Method Two: Combining Figures 1 to 4 This embodiment differs from specific embodiment one in that it also includes triaxial mixing piles 8 and passive zone mixing piles 9. The triaxial mixing piles 8 are located on the outer side of the pipe piles 1, and the passive zone mixing piles 9 are located on the inner side of the pipe piles 1. The base plate 6 is located on the top surface of the passive zone mixing piles 9. This design aims to improve the stability of the foundation pit support. Other components and connection methods are the same as in specific embodiment one.

[0029] Specific implementation method three: Combining Figures 1 to 4This embodiment differs from specific embodiment one in that backfill soil 8 is provided on the outer side of the floor slab. The diagonal supports are removed, and replacement support plates are used for support. Backfill soil is then filled between the outer side of the floor slab and the pipe piles. This design aims to improve the stability of the foundation pit support. Other components and connection methods are the same as in specific embodiment one or two.

[0030] Specific implementation method four: Combination Figures 1 to 4 This embodiment differs from specific embodiment one in that the backfill soil 10 is cohesive soil or stone powder. Using cohesive soil or stone powder can improve the overall stability of the foundation pit. Other components and connection methods are the same as any one of specific embodiments one to three.

[0031] Specific Implementation Method Five: Combining Figures 1 to 4 This embodiment differs from specific embodiment one in that the capping beam 2 includes a first embedded reinforcing bar 21 and a first embedded steel plate 22. One end of the first embedded reinforcing bar 21 is tied to the reinforcing bar of the capping beam 2, and the first embedded steel plate 22 is disposed on the inner side of the capping beam 2. The other end of the first embedded reinforcing bar 21 is welded to the surface of the first embedded steel plate 22. This design aims to form an integral structure between the first embedded steel plate and the capping beam, improving support efficiency. Other components and connection methods are the same as in any one of specific embodiments one to four.

[0032] Specific Implementation Method Six: Combination Figures 1 to 4 This embodiment differs from specific embodiment one in that the supporting pier 4 includes a second embedded reinforcing bar 41 and a second embedded steel plate 42. One end of the second embedded reinforcing bar 41 is tied to the reinforcing bar of the supporting pier 4, and the second embedded steel plate 42 is placed on the supporting surface of the supporting pier 4. The other end of the second embedded reinforcing bar 41 is welded to the surface of the second embedded steel plate 42. This design aims to form an integral structure between the second embedded steel plate and the supporting pier, improving support efficiency. Other components and connection methods are the same as any one of specific embodiments one to five.

[0033] Specific implementation method seven: Combination Figures 1 to 4 This embodiment differs from specific embodiment one in that the inner surface of the capping beam 2 is parallel to the supporting surface of the supporting pier 4. This design facilitates the construction of the diagonal support and improves construction efficiency. Other components and connection methods are the same as any one of specific embodiments one through six.

[0034] Specific implementation method eight: Combination Figures 1 to 4This embodiment differs from specific embodiment one in that it also includes a replacement concrete block 11. The inner side of the replacement concrete block 11 abuts against the base plate 6, and the outer side of the replacement concrete block 11 abuts against the pipe pile 1. The thickness of the replacement concrete block 11 is the same as the thickness of the base plate 6. This design aims to form an integral support structure between the replacement concrete block and the base plate, improving support stability. Other components and connection methods are the same as in any one of specific embodiments one through seven.

[0035] Specific Implementation Method Nine: Combining Figures 1 to 4 This embodiment differs from specific embodiment one in that the concrete type in the replacement concrete block 11 is the same as that in the floor slab. This design aims to create an integral support structure between the replacement concrete block and the base slab, thereby improving support stability. Other components and connection methods are the same as in any one of specific embodiments one through eight.

[0036] Specific Implementation Method Ten: Combining Figures 1 to 4 This embodiment differs from specific embodiment one in that the concrete used in the replacement support concrete block 11 is C30. Other components and connection methods are the same as any one of specific embodiments one through nine.

[0037] Detailed Implementation Method Eleven: Combining Figures 1 to 4 This embodiment differs from Specific Embodiment 1 in that the pipe pile can be replaced by a cast-in-place pile. Other components and connection methods are the same as any one of Specific Embodiments 1 to 10.

[0038] The construction process of this utility model is as follows:

[0039] Step 1: Level the site, construct triaxial mixing piles and passive zone reinforcement mixing piles. After the mixing piles reach initial setting strength, construct the cast-in-place piles / pipe piles after 14 days for the cross-section and 7 days for the cross-section. The cast-in-place piles should be tangent to the passive zone mixing piles by 100mm during construction.

[0040] Step 2: After the concrete strength of the cap beam reaches 80% of the design strength, the foundation pit is excavated in layers and sections. At the same time, a counterweight reinforcement soil platform is reserved at the edge of the foundation pit. After the counterweight soil platform is exposed, wire mesh is promptly installed and shotcrete is applied for protection. After the foundation pit is excavated to the bottom, the cushion layer is poured immediately and the bottom slab and supports are constructed.

[0041] Step 3: After the concrete strength of the support pier and base slab reaches 80% of the design strength, when constructing the steel pipes for the steel inclined supports, grooves should be cut in the counterweight soil platform for the steel pipes. Large-area excavation of the counterweight soil platform is not allowed. A prestress of 100KN should be applied.

[0042] Step 4: Gradually excavate the soil of the counterweight platform to the bottom of the pit and construct the side wall mesh shotcrete and pit bottom cushion layer. Construct the foundation and bottom slab structure, pour the bottom slab and the replacement support plate strip at the edge of the pit, and construct upwards to the second basement floor slab, construct the second basement floor slab and replacement support plate.

[0043] Step 5: Once the strength of the replacement support plate reaches 85%, remove the diagonal supports. Continue construction of the basement structure until the foundation pit is backfilled.

[0044] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A diagonal bracing structure for a foundation pit support, characterized by It includes pipe piles (1), cap beams (2), diagonal bracing (3), support piers (4), floor slabs, and replacement support plates (5). Pipe piles (1) are set vertically on the side wall of the foundation pit, capping beams (2) are set at the top of pipe piles (1), and replacement support plates (5) are set horizontally on the inner wall of pipe piles (1) and the replacement support plates (5) abut against the outer side of the floor slab. The floor slab includes a base slab (6) and a floor slab (7) both arranged in the horizontal direction. A reserved hole is provided in the middle of the floor slab (7). The base slab (6) is set on the top surface of the foundation pit. The support pier (4) is set on the top surface of the base slab (6). A support surface is provided on one side of the support pier (4). One end of the inclined support (3) abuts against the support surface. The inclined support (3) passes through the reserved hole. The other end of the inclined support (3) abuts against the inner side of the cap beam (2).

2. The structure according to claim 1, wherein It also includes a triaxial mixing pile (8) and a passive zone mixing pile (9). The triaxial mixing pile (8) is set on the outside of the pipe pile (1), and the passive zone mixing pile (9) is set on the inside of the pipe pile (1). The bottom plate (6) is set on the top surface of the passive zone mixing pile (9).

3. The structure according to claim 1, wherein Backfill soil (10) is provided on the outside of the floor slab.

4. The structure according to claim 3, wherein The backfill soil (10) is cohesive soil or stone powder.

5. The structure according to claim 1, wherein The cap beam (2) includes a first embedded bar (21) and a first embedded steel plate (22). One end of the first embedded bar (21) is tied to the reinforcing bar of the cap beam (2), and the first embedded steel plate (22) is set on the inner side of the cap beam (2). The other end of the first embedded bar (21) is welded to the surface of the first embedded steel plate (22).

6. The structure according to claim 1, wherein The support pier (4) includes a second embedded bar (41) and a second embedded steel plate (42). One end of the second embedded bar (41) is tied to the reinforcing bar of the support pier (4), and the second embedded steel plate (42) is set on the support surface of the support pier (4). The other end of the second embedded bar (41) is welded to the surface of the second embedded steel plate (42).

7. The diagonal bracing structure for foundation pit support according to claim 1, characterized in that, The inner side of the cap beam (2) is parallel to the support surface of the support pier (4).

8. A diagonal bracing structure for foundation pit support according to claim 1, characterized in that... It also includes a replacement concrete block (11), the inner side of which abuts against the base plate (6), and the outer side of which abuts against the pipe pile (1). The thickness of the replacement concrete block (11) is the same as that of the base plate (6).

9. A diagonal bracing structure for foundation pit support according to claim 8, characterized in that, The concrete type in the replacement support concrete block (11) is the same as that in the floor slab.

10. A diagonal bracing structure for foundation pit support according to claim 9, characterized in that, The concrete type in the replacement support concrete block (11) is C30.

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