CN219825281U - Foundation pit support replacing structure capable of reducing influence on main structure - Google Patents
Foundation pit support replacing structure capable of reducing influence on main structure Download PDFInfo
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- CN219825281U CN219825281U CN202320933975.4U CN202320933975U CN219825281U CN 219825281 U CN219825281 U CN 219825281U CN 202320933975 U CN202320933975 U CN 202320933975U CN 219825281 U CN219825281 U CN 219825281U
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- 229910000831 Steel Inorganic materials 0.000 claims description 72
- 239000010959 steel Substances 0.000 claims description 72
- 238000002955 isolation Methods 0.000 claims description 21
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 239000004567 concrete Substances 0.000 claims description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 7
- 238000005452 bending Methods 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 4
- 239000002689 soil Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The utility model relates to the technical field of foundation pit supporting construction, and discloses a foundation pit support replacing structure capable of reducing influence on a main structure. The support structure is provided with a plurality of layers of support replacing structures, and holes for communicating the upper space and the lower space of the support replacing structures are formed in the support replacing structures and serve as constructor passages and future backfill passages. In addition, the support changing assembly is only connected with the enclosure structure and is not connected with the outer wall of the basement; therefore, when the lower part of the support replacing structure is provided with a cavity and the upper part of the support replacing structure is provided with backfill, the support replacing structure can not influence the main body structure even if generating larger bending moment and deformation, the main body structure can be effectively prevented from cracking, and the safety of the underground main body structure is ensured.
Description
Technical Field
The utility model relates to the technical field of foundation pit supporting construction, in particular to a foundation pit support replacing structure capable of reducing influence on a main structure.
Background
With the continuous development of infrastructure construction, the deep foundation pit engineering layers of two or more basements are endless, and in a plurality of foundation pit supporting forms, pile supporting (i.e. guard piles (walls) +inner supporting) structures are widely applied because the pile supporting structures are suitable for foundation pits with different shapes, different depths and different soil textures, and the pile supporting structures have the advantages of high safety coefficient, small deformation and the like.
However, after the construction of the support structure and the excavation of the earthwork are completed, the underground main body structure is removed layer by layer in the construction process from bottom to top, and the water and soil pressure outside the support structure is gradually transferred to the main body structure which is just constructed, so that other support structures are required to replace the inner support before the support structure is removed so as to continuously support the support structure, namely 'support replacement', and the support replacement structure is required to be designed.
The support between each layer plate of the main body structure and the enclosure structure is generally in the form of a reinforced concrete support-changing structure, and can be a support-changing beam or a plate belt which is anchored with the reinforcing steel bars of the underground main body structure and synchronously poured into a whole.
And when the foundation pit fertilizer groove area is backfilled, the existence of the support changing structure can cause the condition that backfill soil is not compact. At this time, there is cavity, top and exists backfill load in the structure below that trades to prop, leads to trades to prop the structure and appears moment of flexure, deformation etc. it can transmit to underground main structure, leads to main structure fracture, damage. Therefore, there is a need for a more reliable bracing structure that reduces the impact on the main structure while ensuring foundation pit safety.
Disclosure of Invention
Aiming at the defects in the prior art, the foundation pit support replacing structure capable of reducing the influence on the main structure is provided, and the phenomena of cracking and breakage of the main structure caused by bending moment and deformation of the support replacing structure are effectively avoided while horizontal load is born.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
can reduce foundation ditch that influences main structure trades and prop structure, its characterized in that: the foundation pit comprises an enclosure structure arranged on the inner peripheral side of a foundation pit and a main body structure arranged on the inner side of the enclosure structure, wherein a certain interval is reserved between the main body structure and the enclosure structure; the main body structure comprises basement outer walls and basement floors arranged between the basement outer walls;
a plurality of layers of support replacing structures are arranged between the main body structure and the enclosure structure, each layer of support replacing structure is composed of a plurality of support replacing assemblies which are horizontally arranged at intervals, a hole for conveying backfill is reserved between every two adjacent support replacing assemblies, one side of each support replacing assembly is fixed on the enclosure structure, and the other side of each support replacing assembly is propped against the outer wall of the basement.
According to the technical scheme, the support changing assembly adopts a beam-shaped structure; the support changing assembly comprises a support changing beam main body, hanging ribs and an isolation layer; one end of the main body on the support beam is fixed on support piles of the enclosure structure, and the number of the support beams corresponds to the number of the support piles one by one; the two ends of the hanging bar are respectively fixed on the support pile and the support beam replacement main body; the isolation layer is located between the other end of the main body of the support beam and the main body structure, and the isolation layer is clamped between the main body of the support beam and the outer wall of the basement.
According to the technical scheme, the support changing assembly adopts a plate-shaped structure; the support changing assembly comprises a support changing plate main body formed by pouring concrete, steel bars arranged in the support changing plate main body, hanging bars obliquely arranged between the enclosure structure and the upper surface of the support changing plate main body, and an isolation layer positioned between the support changing plate main body and the basement outer wall, wherein the steel bars are fixedly connected with the steel bars in the enclosure structure, the support changing plate main body is fixedly connected with the enclosure structure, one ends of the hanging bars are fixed on the steel bars, and the other ends of the hanging bars are fixed on the steel bars in the enclosure structure; the isolation layer is clamped between the support plate main body and the basement outer wall.
According to the technical scheme, the steel bars comprise transverse steel bars and longitudinal steel bars, the transverse steel bars are in a plurality of connected rectangular structures, the transverse steel bars are arranged in the support plate main body at intervals in parallel, and one ends of the transverse steel bars are fixed on the internal steel bars of the enclosure structure; a plurality of longitudinal steel bars are circumferentially distributed at intervals on the inner ring of the transverse steel bar, the longitudinal steel bars are mutually parallel, and the longitudinal steel bars are fixed on the transverse steel bars.
According to the technical scheme, the diameter of the longitudinal steel bar is not less than 10mm, and the interval value range is 0.1 m-0.2 m; the diameter of the transverse steel bar is not less than 10mm, and the distance value range is 0.1 m-0.2 m.
According to the technical scheme, the transverse steel bars are replaced by stirrups.
According to the technical scheme, the width of the support plate main body is not smaller than 2m, and the width of the opening between two adjacent support plate main bodies is not smaller than 1m.
According to the technical scheme, the isolation layer adopts a wood template or an outer wall waterproof material, and only horizontal load is transmitted between the support changing structure and the main body structure; the size of the spacer plate layer is matched with the end size of the main body of the support exchange plate.
According to the technical scheme, the diameter of the hanging ribs is not smaller than 20mm, and the distance between two adjacent hanging ribs on the same support changing assembly is not larger than 2m.
According to the technical scheme, the height of each layer of support replacing structure is consistent with the height of the adjacent basement floor slab.
The utility model has the following beneficial effects:
the support structure is provided with a plurality of layers of support replacing structures, and holes for communicating the upper space and the lower space of the support replacing structures are formed in the support replacing structures and serve as constructor passages and future backfill passages. In addition, the support changing assembly is only connected with the enclosure structure and is not connected with the outer wall of the basement; therefore, when the lower part of the support replacing structure is provided with a cavity and the upper part of the support replacing structure is provided with backfill, the support replacing structure can not influence the main body structure even if generating larger bending moment and deformation, the main body structure can be effectively prevented from cracking, and the safety of the underground main body structure is ensured.
Drawings
FIG. 1 is a schematic cross-sectional view of a bracing-exchanging structure according to an embodiment of the present utility model;
FIG. 2 is a schematic plan view of a bracing-exchanging structure according to an embodiment of the present utility model;
in the figure, 1, an enclosure structure; 2. a basement exterior wall; 3. basement floor; 4. a support changing structure; 4-1, a main body of the support changing plate; 4-2, hanging ribs; 4-3, reinforcing steel bars; 4-31, transverse steel bars; 4-32, longitudinal steel bars; 4-4, an isolation layer; 5. and (5) an opening.
Detailed Description
The utility model will now be described in detail with reference to the drawings and examples.
Referring to fig. 1 to 2, the foundation pit support replacing structure provided by the utility model can reduce the influence on a main structure.
Example 1
The foundation pit comprises an enclosure structure 1 arranged on the inner peripheral side of a foundation pit and a main body structure arranged on the inner side of the enclosure structure, wherein a certain interval is reserved between the main body structure and the enclosure structure; the main body structure comprises a basement outer wall 2 and a basement floor slab 3 arranged between the basement outer walls;
a plurality of layers of support changing structures 4 are arranged between the main body structure and the enclosure structure, each layer of support changing structure is composed of a plurality of support changing assemblies which are horizontally arranged at intervals, a hole 5 for conveying backfill is reserved between every two adjacent support changing assemblies, one side of each support changing assembly is fixed on the enclosure structure, and the other side of each support changing assembly is propped against the outer wall of the basement.
In this embodiment, be equipped with a plurality of layers on envelope and trade and prop the structure, trade and prop the structure and be equipped with the entrance to a cave that the upper and lower space of intercommunication trade and prop the structure, as constructor passageway and future backfill passageway. In addition, the support changing assembly is only connected with the enclosure structure and is not connected with the outer wall of the basement; therefore, when the lower part of the support replacing structure is provided with a cavity and the upper part of the support replacing structure is provided with backfill, the support replacing structure can not influence the main body structure even if generating larger bending moment and deformation, the main body structure can be effectively prevented from cracking, and the safety of the underground main body structure is ensured.
Example 2
The structure and principle of embodiment 2 are similar to those of embodiment 1, except that: a preferred change strut assembly is provided. According to the working condition of construction sites, the support replacing structure is selected, and the applicability of the device is improved.
Specifically, the support changing assembly adopts a beam-shaped structure; the support changing assembly comprises a support changing beam main body, hanging ribs and an isolation layer; one end of the main body on the support beam is fixed on support piles of the enclosure structure, and the number of the support beams corresponds to the number of the support piles one by one; the two ends of the hanging bar are respectively fixed on the support pile and the support beam replacement main body; the isolation layer is located between the other end of the main body of the support beam and the main body structure, and the isolation layer is clamped between the main body of the support beam and the outer wall of the basement. Because the isolating layer is arranged between the support beam main body and the main body structure, the support beam main body and the main body structure are not fixedly connected, only horizontal load is transmitted between the support beam main body and the main body structure, and even if bending moment and deformation are generated under the vertical backfill load at the later stage of the support beam main body, the support beam main body can not influence the main body structure. The hanging rib is used for solving the vertical supporting problem of the support changing structure and bearing the working load of constructors.
Example 3
The structure and principle of embodiment 3 are similar to those of embodiment 1, except that: another preferred change strut assembly is provided. According to the working condition of construction sites, the support replacing structure is selected, and the applicability of the device is improved.
Specifically, the support changing assembly adopts a plate-shaped structure; the support changing assembly comprises a support changing plate main body 4-1 formed by pouring concrete, steel bars 4-3 arranged in the support changing plate main body, hanging bars 4-2 obliquely arranged between the support changing plate main body and the upper surface of the support changing plate main body, and an isolation layer 4-4 positioned between the support changing plate main body and the outer wall of the basement, wherein the steel bars are fixedly connected with the steel bars in the support changing plate main body and the support changing structure, one ends of the hanging bars are fixed on the steel bars, and the other ends of the hanging bars are fixed on the steel bars in the support changing structure; the isolation layer is clamped between the support plate main body and the basement outer wall. Because the isolating layer is arranged between the support plate main body and the main body structure, the support plate main body and the main body structure are not fixedly connected, only horizontal load is transmitted between the support plate main body and the main body structure, and even if bending moment and deformation are generated under the vertical backfill load at the later stage of the support plate main body, the support plate main body structure can not influence the main body structure. The hanging rib is used for solving the vertical supporting problem of the support changing structure and bearing the working load of constructors.
Example 4
The structure and principle of embodiment 4 are similar to those of embodiment 3, except that: the detailed description of the composition mode of the steel bar promotes the stable and reliable structure of the support changing plate.
The steel bars comprise transverse steel bars 4-31 and longitudinal steel bars 4-32, the transverse steel bars are in a plurality of connected rectangular structures, the plurality of transverse steel bars are arranged in the support plate main body at intervals in parallel, and one ends of the transverse steel bars are fixed on the inner steel bars of the enclosure structure; a plurality of longitudinal steel bars are circumferentially distributed at intervals on the inner ring of the transverse steel bar, the longitudinal steel bars are mutually parallel, and the longitudinal steel bars are fixed on the transverse steel bars. In this embodiment, the transverse steel bars are connected to the steel bars inside the enclosure structure in a welding manner.
In the embodiment, the diameter of the longitudinal steel bar is not less than 10mm, and the interval value range is 0.1 m-0.2 m; the diameter of the transverse steel bar is not less than 10mm, and the distance value range is 0.1 m-0.2 m. In the embodiment in the figure, the diameter of the longitudinal steel bars is 14mm, and the spacing is 0.2m; the diameter of the transverse steel bars is 16mm, and the spacing is 0.2m.
Example 5
The structure and principle of embodiment 5 are similar to those of embodiment 4, except that: the other steel bar composition mode is simplified, and the stable and reliable structure and the applicable working condition of the support changing plate are improved. Specifically, the transverse reinforcing steel bars are replaced by stirrups.
Example 6
The structure and principle of embodiment 6 is similar to those of embodiments 3-5, except that: the width of the main body of the support plate is defined, and the width of the opening between two adjacent support plate main bodies is limited.
The width of the main body of the support changing plate is not less than 2m, and the width of the opening between two adjacent main bodies of the support changing plate is not less than 1m.
Example 7
The structure and principle of embodiment 7 is similar to those of embodiments 1 to 6, except that:
the isolation layer adopts a wood template or an outer wall waterproof material, and only horizontal load is transmitted between the support changing structure and the main body structure; the size of the spacer plate layer is matched with the end size of the main body of the support exchange plate. In the embodiment shown, the isolation layer is 3 meters wide and 0.4 meters high;
example 8
The structure and principle of embodiment 8 is similar to those of embodiments 1 to 6, except that:
the diameter of the hanging ribs is not smaller than 20mm, and the distance between two adjacent hanging ribs on the same support changing assembly is not larger than 2m. In the embodiment of the figure, the diameter of the hanging ribs is 25mm, and the distance between two adjacent hanging ribs is 1m.
Example 9
The structure and principle of embodiment 9 are similar to those of embodiments 1 to 8, except that: preferably, the height of each layer of bracing structure corresponds to the height of an adjacent basement floor.
The construction process of the utility model is as follows:
taking a certain engineering design as an example, the design is provided with a three-layer basement, the depth of a foundation pit is 12 meters, and the foundation pit supporting form adopts an enclosure structure (underground continuous wall) +two concrete internal supports.
(1) After the foundation slab is constructed, erecting a support-changing structure template simultaneously with the outer wall of the negative three-layer main body structure and the floor template, and reserving the position of the hole;
(2) Stripping out the steel bars on the enclosure structure and welding the steel bars with the hanging bars; welding the transverse steel bars with the enclosure structure steel bars, laying longitudinal steel bars, connecting the hanging steel bars, and placing a wood template serving as an isolation layer;
(3) Concrete of the support changing assembly and the main structure (the basement outer wall and the basement floor slab) can be poured at the same time, and the labels are C50 concrete;
(4) After maintenance is carried out to the design strength, the second inner support of the upper foundation pit supporting structure can be removed, the support changing structure can play a role, horizontal load is born, the enclosure structure is supported, and the safety of the foundation pit is ensured;
(5) And continuing to construct templates of the main body structure (the basement outer wall and the basement floor) of the negative two layers, and analogizing until the basement structure is constructed, and backfilling the foundation pit.
The foregoing is merely illustrative of the present utility model and is not intended to limit the scope of the utility model, which is defined by the claims and their equivalents.
Claims (10)
1. Can reduce foundation ditch that influences main structure trades and prop structure, its characterized in that: the foundation pit comprises an enclosure structure arranged on the inner peripheral side of a foundation pit and a main body structure arranged on the inner side of the enclosure structure, wherein a certain interval is reserved between the main body structure and the enclosure structure; the main body structure comprises basement outer walls and basement floors arranged between the basement outer walls;
a plurality of layers of support replacing structures are arranged between the main body structure and the enclosure structure, each layer of support replacing structure is composed of a plurality of support replacing assemblies which are horizontally arranged at intervals, a hole for conveying backfill is reserved between every two adjacent support replacing assemblies, one side of each support replacing assembly is fixed on the enclosure structure, and the other side of each support replacing assembly is propped against the outer wall of the basement.
2. The foundation pit bracing-changing structure capable of reducing influence on a main structure according to claim 1, wherein: the support changing assembly adopts a beam-shaped structure; the support changing assembly comprises a support changing beam main body, hanging ribs and an isolation layer; one end of the main body on the support beam is fixed on support piles of the enclosure structure, and the number of the support beams corresponds to the number of the support piles one by one; the two ends of the hanging bar are respectively fixed on the support pile and the support beam replacement main body; the isolation layer is located between the other end of the main body of the support beam and the main body structure, and the isolation layer is clamped between the main body of the support beam and the outer wall of the basement.
3. The foundation pit bracing-changing structure capable of reducing influence on a main structure according to claim 1, wherein: the support changing component adopts a plate-shaped structure; the support changing assembly comprises a support changing plate main body formed by pouring concrete, steel bars arranged in the support changing plate main body, hanging bars obliquely arranged between the enclosure structure and the upper surface of the support changing plate main body, and an isolation layer positioned between the support changing plate main body and the basement outer wall, wherein the steel bars are fixedly connected with the steel bars in the enclosure structure, the support changing plate main body is fixedly connected with the enclosure structure, one ends of the hanging bars are fixed on the steel bars, and the other ends of the hanging bars are fixed on the steel bars in the enclosure structure; the isolation layer is clamped between the support plate main body and the basement outer wall.
4. A foundation pit bracing-changing structure capable of reducing influence on a main structure according to claim 3, wherein: the steel bars comprise transverse steel bars and longitudinal steel bars, the transverse steel bars are in a plurality of connected rectangular structures, the transverse steel bars are arranged in the support plate main body at intervals in parallel, and one ends of the transverse steel bars are fixed on the inner steel bars of the enclosure structure; a plurality of longitudinal steel bars are circumferentially distributed at intervals on the inner ring of the transverse steel bar, the longitudinal steel bars are mutually parallel, and the longitudinal steel bars are fixed on the transverse steel bars.
5. The foundation pit bracing-changing structure capable of reducing influence on a main structure according to claim 4, wherein: the diameter of the longitudinal steel bar is not less than 10mm, and the interval value range is 0.1 m-0.2 m; the diameter of the transverse steel bar is not less than 10mm, and the distance value range is 0.1 m-0.2 m.
6. The foundation pit bracing-changing structure capable of reducing influence on a main structure according to claim 4, wherein: the transverse reinforcing steel bars are replaced by stirrups.
7. A foundation pit bracing-changing structure capable of reducing influence on a main structure according to claim 3, wherein: the width of the main body of the support changing plate is not less than 2m, and the width of the opening between two adjacent main bodies of the support changing plate is not less than 1m.
8. The foundation pit bracing-changing structure capable of reducing influence on a main structure according to any one of claims 1 to 7, wherein: the isolation layer adopts a wood template or an outer wall waterproof material, and only horizontal load is transmitted between the support changing structure and the main body structure; the size of the spacer plate layer is matched with the end size of the main body of the support exchange plate.
9. The foundation pit bracing-changing structure capable of reducing influence on a main structure according to any one of claims 1 to 7, wherein: the diameter of the hanging ribs is not smaller than 20mm, and the distance between two adjacent hanging ribs on the same support changing assembly is not larger than 2m.
10. The foundation pit bracing-changing structure capable of reducing influence on a main structure according to claim 1, wherein: the height of each layer of support replacing structure is consistent with the height of the adjacent basement floor slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320933975.4U CN219825281U (en) | 2023-04-23 | 2023-04-23 | Foundation pit support replacing structure capable of reducing influence on main structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320933975.4U CN219825281U (en) | 2023-04-23 | 2023-04-23 | Foundation pit support replacing structure capable of reducing influence on main structure |
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| Publication Number | Publication Date |
|---|---|
| CN219825281U true CN219825281U (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320933975.4U Active CN219825281U (en) | 2023-04-23 | 2023-04-23 | Foundation pit support replacing structure capable of reducing influence on main structure |
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| Country | Link |
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| CN (1) | CN219825281U (en) |
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2023
- 2023-04-23 CN CN202320933975.4U patent/CN219825281U/en active Active
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