Intensive deep foundation pit supporting system
By designing an intensive deep foundation pit support system, combined with pile foundation, crown beam, retaining wall, road base and drainage system, the narrow space and traffic guarantee problems in deep foundation pit support and excavation are solved, and the stability and safety of foundation pits are achieved, as well as the trafficability of surrounding roads.
Patent Information
- Application Number
- CN202421405085.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-06-19
AI Technical Summary
When underground construction is carried out in densely populated urban areas, the support and excavation of deep foundation pits face the challenges of narrow space and traffic security, and traditional technologies are difficult to take into account the impact of foundation pit stability, safety and surrounding environment.
Design an intensive deep foundation pit support system, including pile foundation, crown beam, retaining wall, road base and drainage system. Through the combination of pile foundation and crown beam, the design of retaining wall, the backfill of road base and the setting of drainage system, the stability of foundation pit and the passability of surrounding roads is ensured.
It effectively solves the problem of narrow space around the deep foundation pit, ensures the stability and safety of the foundation pit, and ensures the smooth passage of vehicles around the foundation pit, improving the efficiency of urban space utilization.
Smart Images
Figure CN222862289U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, in particular to an intensive deep foundation pit support system. Background Art
[0002] With the development of urban construction, in densely populated urban areas, it is often necessary to carry out underground construction activities in limited spaces, such as subway stations and underground garages. Usually, the edge of the foundation pit of these projects is very close to the "building red line", and the construction space is relatively narrow. The support and excavation of deep foundation pits have become a very challenging task. Not only is it necessary to ensure the stability and safety of the foundation pit, but also the impact on the surrounding environment must be considered. Traditional foundation pit support technology often only considers the stability and safety of the foundation pit, and does not consider the needs of narrow space and traffic security. There are often dead-end roads next to the foundation pit, and there are no ring roads at the construction site. Utility Model Content
[0003] The utility model aims to address the deficiencies of the prior art and provides an intensive deep foundation pit support system, comprising a pile foundation, a crown beam is arranged above the pile foundation for connecting each supporting pile, a retaining wall is arranged on the inner upper part of the crown beam, a road base is arranged on the upper part and the outer side of the crown beam, a road structure layer is arranged above the road base, original soil is arranged on the outer side of the pile foundation, backfill soil is arranged above the original soil as the road base, the backfill soil is arranged below the road structure layer, the retaining wall is used to prevent the backfill soil from entering the foundation pit, and a drainage system is also arranged in the road base.
[0004] Preferably, the retaining wall is cast with concrete, and the retaining wall is a reinforced concrete retaining wall designed with a thickness of about 20 cm on the inner side of the crown beam, and the steel bars of the retaining wall are anchored in the crown beam.
[0005] Preferably, the road base is backfilled with 30 cm of gravel or ballast, and assembled trestle slabs are laid as the road structure layer.
[0006] Preferably, the drainage system comprises a prefabricated drainage ditch buried in the road base, and a load-bearing cover plate is added on the upper part of the prefabricated drainage ditch.
[0007] Compared with the prior art, the beneficial effects of the utility model are: solving the problem of narrow space around deep foundation pits and even the problem of vehicles being unable to pass on the ground, while ensuring the stability and safety of the deep foundation pits, which has important practical significance for the efficient use of urban space. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0009] Figure 1 It is a schematic diagram of the structure of the utility model.
[0010] In the figure: 1. Pile foundation; 2. Cap beam; 3. Retaining wall; 4. Original soil; 5. Backfill soil; 6. Drainage ditch; 7. Load-bearing cover plate; 8. Gravel; 9. Trestle board. DETAILED DESCRIPTION
[0011] The technical solution of the utility model is described in detail below with reference to the accompanying drawings, but the protection scope of the utility model is not limited to the embodiments.
[0012] Reference Figure 1 The utility model discloses an intensive deep foundation pit support system, comprising a pile foundation 1, a crown beam 2 is arranged above the pile foundation 1 for connecting each supporting pile, a retaining wall 3 is arranged on the inner upper part of the crown beam 2, a road base is arranged on the upper part and the outer side of the crown beam 2, a road structure layer is arranged above the road base, original soil 4 is arranged on the outer side of the pile foundation 1, backfill soil 5 is arranged above the original soil 4 as the road base, the backfill soil 5 is arranged below the road structure layer, the retaining wall 3 is used to prevent the backfill soil 5 from entering the foundation pit, and a drainage system is also arranged in the road base. In the utility model, the pile foundation 1 is provided with a cap beam 2 for connecting each supporting pile, a retaining wall 3 is arranged on the inner upper part of the cap beam 2, a road base is arranged on the upper part and the outer side of the cap beam 2, a road structure layer is arranged above the road base, original soil 4 is arranged on the outer side of the pile foundation 1, backfill soil 5 is arranged above the original soil 4 as the road base, the backfill soil 5 is arranged below the road structure layer, the retaining wall 3 is used to prevent the backfill soil 5 from entering the foundation pit, and a drainage system is also arranged in the road base. The base 1 is located around the deep foundation pit to stabilize the soil, buildings and structures outside the foundation pit; the crown beam 2 is located on the top of the supporting piles to connect the supporting piles and enhance the stability of the entire support system; the retaining wall 3 is located on the upper inner side of the crown beam 2 to prevent the backfill soil 5 of the road base from entering the foundation pit and maintain the stability of the roadbed; the road structure layer is located on the upper and outer sides of the crown beam 2 to ensure the passage of vehicles, disperse the traffic load and reduce the impact on the foundation pit; the drainage system collects rainwater and accumulated water on the ground to prevent it from flowing into the foundation pit. The utility model can effectively ensure the safety of deep foundation pit construction and ensure the smooth passage of vehicles around the foundation pit.
[0013] The construction steps of this utility model are as follows:
[0014] Design of supporting piles and crown beam 2: The supporting piles and crown beam 2 are designed according to the geological survey report, soil conditions, foundation pit depth, traffic load and other factors; the supporting piles are in the form of reinforced concrete cast-in-place piles; the crown beam 2 is generally a reinforced concrete structure.
[0015] Design of retaining wall 3: When the area outside the foundation pit is narrow and insufficient for vehicles to pass through, and the top of the crown beam 2 is lower than the designed road surface, a reinforced concrete retaining wall 3 with a thickness of about 20 cm is designed on the inner side of the crown beam 2.
[0016] Support pile construction: The support piles are constructed according to the design drawings and construction plan requirements, generally in reinforced concrete structures.
[0017] Construction of crown beam 2: According to the design drawings and construction plan requirements, cut off the top pile head concrete to expose the steel bars, anchor the pile head steel bars into crown beam 2, and construct crown beam 2.
[0018] Construction of retaining wall 3: According to the design drawings and construction plan requirements, retaining wall 3 is constructed at the top of crown beam 2 close to the foundation pit side, and the steel bars of retaining wall 3 need to be anchored into crown beam 2.
[0019] Road base construction: backfill soil in layers under the road and outside the foundation pit 5. Tamp and compact layer by layer.
[0020] Drainage system construction: a prefabricated drainage ditch 6 is buried in the road base, and a load-bearing cover plate 7 is added on top.
[0021] Construction of road structure layer: backfill 30cm gravel 8 or ballast on the road base, compact it layer by layer, and then lay the assembled trestle board 9 as the road structure layer.
[0022] As above, although the utility model has been shown and described with reference to a specific preferred embodiment, it should not be interpreted as limiting the utility model itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the utility model defined in the attached claims.
Claims
1. An intensive deep foundation pit support system, characterized by: It includes a pile foundation, a cap beam is arranged above the pile foundation for connecting each supporting pile, a retaining wall is arranged on the inner upper part of the cap beam, a road base is arranged on the upper and outer sides of the cap beam, a road structure layer is arranged above the road base, original soil is arranged on the outer side of the pile foundation, backfill soil is arranged above the original soil as the road base, the backfill soil is arranged below the road structure layer, the retaining wall is used to prevent the backfill soil from entering the foundation pit, and a drainage system is also arranged in the road base.
2. The intensive deep foundation pit support system according to claim 1 is characterized in that: The retaining wall is cast in concrete and is a reinforced concrete retaining wall designed with a thickness of about 20 cm on the inner side of the crown beam. The steel bars of the retaining wall are anchored in the crown beam.
3. The intensive deep foundation pit support system according to claim 2 is characterized in that: The road base is backfilled with 30 cm of gravel or ballast, and assembled trestle slabs are laid as the road structure layer.
4. The intensive deep foundation pit support system according to claim 3 is characterized in that: The drainage system comprises a prefabricated drainage ditch buried in the road base, and a load-bearing cover plate is added on the upper part of the prefabricated drainage ditch.