A kind of fat groove reinforcing structure and deep foundation pit support structure

Abstract

The utility model relates to a kind of fat groove reinforcing structure and deep foundation pit support structure, relate to building structure field.Fat groove reinforcing structure includes being located between newly excavated foundation pit and existing building basement foundation pit support pile and with each foundation pit support pile top connection concrete crown beam, further include being located between foundation pit support pile and existing building basement grouting solidification backfill soil layer, grouting solidification backfill soil layer extends to the side of existing building strip base and top, the top surface of grouting solidification backfill soil layer is provided with the plain concrete slab of the connection foundation pit support pile side wall and existing building basement side wall, the top of plain concrete slab is provided with backfill soil layer, and backfill soil layer top is provided with the concrete surface layer flush with concrete crown beam.Fat groove reinforcing structure and deep foundation pit support structure form reliable force transmission path by setting up plain concrete slab between foundation pit support pile and existing building basement, and limit on side, and backfill soil layer and concrete surface layer are set on the top of plain concrete slab, can effectively reinforce foundation pit outside soil body, improve construction safety.

Description

Technical Field

[0001] This application relates to the field of building structures, and more specifically, to a trench reinforcement structure and a deep foundation pit support structure. Background Technology

[0002] When a deep foundation pit is excavated next to an existing high-rise building after it has been completed and put into use, and the support structure is to be constructed, the soil in the trench between the basement of the existing high-rise building and the deep foundation pit is backfill soil because the basement of the existing high-rise building is excavated with slope. The soil is relatively loose and the width of the soil is limited, which makes it difficult to meet the needs of bearing and transmitting passive earth pressure and cannot guarantee construction safety. Utility Model Content

[0003] The purpose of this application is to provide a deep foundation pit reinforcement structure and a deep foundation pit support structure. By setting a plain concrete slab between the foundation pit support piles and the basement of the existing building to form a reliable force transmission path for lateral restraint, and setting a backfill soil layer and a concrete surface layer on top of the plain concrete slab, the soil outside the foundation pit can be effectively reinforced and construction safety can be improved.

[0004] This application is implemented as follows:

[0005] This application provides a trench reinforcement structure, which includes foundation pit support piles located between a newly excavated foundation pit and an existing building basement, and a concrete cap beam connected to the top of each foundation pit support pile. It also includes a grouting and solidifying backfill soil layer located between the foundation pit support piles and the existing building basement. The grouting and solidifying backfill soil layer extends to the side and top of the existing building strip foundation. The top surface of the grouting and solidifying backfill soil layer is provided with a plain concrete slab connecting the top side wall of the foundation pit support piles and the side wall of the existing building basement. The top of the plain concrete slab is provided with a backfill soil layer, and the top of the backfill soil layer is provided with a concrete surface layer flush with the concrete cap beam.

[0006] In some alternative implementations, the top of the existing building's base is connected to a steel support column, the top of which is connected to the bottom of the plain concrete slab.

[0007] In some alternative implementations, the steel support column has at least one pair of vertically arranged support steel sections, and the two adjacent support steel sections are connected by multiple connecting steel plates.

[0008] In some alternative implementations, at least one horizontally arranged reinforcing steel plate is embedded in the plain concrete slab, with multiple reinforcing bars at the top and bottom of the reinforcing steel plate.

[0009] In some alternative implementations, the tops of at least one pair of supporting steel sections extend into the plain concrete slab and connect to a reinforcing steel plate.

[0010] In some alternative implementations, the plain concrete slab is connected to the sidewall of the existing building's basement floor slab.

[0011] In some alternative implementations, multiple diagonal braces connect the top of the concrete cap beam to the side wall of the existing building's basement.

[0012] This application also provides a deep foundation pit support structure, which includes the above-mentioned trench reinforcement structure.

[0013] In some alternative implementations, the system also includes multiple reinforced concrete supports with one end connected to the inner wall of the foundation pit support piles and multiple steel lattice columns, each of which is connected to multiple reinforced concrete supports spaced apart along the height direction.

[0014] The beneficial effects of this application are as follows: The trench reinforcement structure provided by this application includes foundation pit support piles located between the newly excavated foundation pit and the basement of the existing building, and concrete cap beams connected to the top of each foundation pit support pile. It also includes a grouting and solidifying backfill soil layer located between the foundation pit support piles and the basement of the existing building. The grouting and solidifying backfill soil layer extends to the side and top of the existing building strip foundation. The top surface of the grouting and solidifying backfill soil layer is provided with a plain concrete slab connecting the side wall of the foundation pit support piles and the side wall of the existing building basement. The top of the plain concrete slab is provided with a backfill soil layer, and the top of the backfill soil layer is provided with a concrete surface layer flush with the concrete cap beam. The trench reinforcement structure and deep foundation pit support structure provided in this application obtain a grout-cured backfill layer by grouting the backfill layer between the foundation pit support piles and the existing building basement. A plain concrete slab is set on the top surface of the grout-cured backfill layer to connect the side wall of the foundation pit support piles and the side wall of the existing building basement to form a reliable force transmission path for lateral restraint. A backfill layer and a concrete surface layer are set on the top of the plain concrete slab, which can effectively reinforce the soil outside the foundation pit and improve construction safety. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a partial cross-sectional structural diagram of the deep foundation pit support structure provided in the embodiments of this application;

[0017] Figure 2 This is a partially enlarged cross-sectional view of the trench reinforcement structure in the deep foundation pit support structure provided in the embodiments of this application.

[0018] In the diagram: 100, foundation pit support pile; 110, concrete cap beam; 120, grouting and curing backfill soil layer; 130, plain concrete slab; 140, backfill soil layer; 150, concrete surface layer; 160, steel support column; 170, supporting steel; 180, connecting steel plate; 200, reinforcing steel plate; 210, reinforcing steel bar; 220, reinforced concrete support; 230, steel lattice column; 240, diagonal brace; 300, newly excavated foundation pit; 310, existing building basement; 320, existing building strip foundation. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] The following describes in further detail the features and performance of the trench reinforcement structure and deep foundation pit support structure of this application with reference to the embodiments.

[0027] like Figure 1 and Figure 2 As shown in the embodiment of this application, a trench reinforcement structure is provided, which includes foundation pit support piles 100 disposed between a newly excavated foundation pit 300 and an existing building basement 310, a concrete cap beam 110 connected to the top of each foundation pit support pile 100, and a grouting and solidified backfill soil layer 120 disposed between the foundation pit support piles 100 and the existing building basement 310. The grouting and solidified backfill soil layer 120 extends to the side and top of the existing building strip foundation 320. The top surface of 0 is provided with a plain concrete slab 130 connecting the side wall of the foundation pit support pile 100 and the side wall of the existing building basement 310. The plain concrete slab 130 is connected to the side wall of the first basement floor slab of the existing building basement 310. The top of the plain concrete slab 130 is provided with a backfill soil layer 140. The top of the backfill soil layer 140 is provided with a concrete surface layer 150 that is flush with the concrete cap beam 110. The top of the concrete cap beam 110 and the side wall of the existing building basement 310 are connected by diagonal braces 240 arranged at intervals.

[0028] The top of the existing building's base 320 is connected to a steel support column 160, and the top of the steel support column 160 is connected to the bottom of the plain concrete slab 130. The steel support column 160 is provided with pairs of supporting steel sections 170 arranged at intervals along its length, and each pair of supporting steel sections 170 is arranged vertically and parallel. Two adjacent supporting steel sections 170 are connected by connecting steel plates 180 arranged at intervals. The plain concrete slab 130 is embedded with reinforcing steel plates 200 arranged at intervals along its length, and each reinforcing steel plate 200 is arranged horizontally. The top and bottom of the reinforcing steel plate 200 are respectively provided with reinforcing steel bars 210 arranged at intervals. The top of each pair of supporting steel sections 170 extends into the plain concrete slab 130 and connects to a reinforcing steel plate 200.

[0029] During the construction of the trench reinforcement structure provided in this application embodiment, the following steps are taken: First, the foundation pit support piles 100 and concrete cap beams 110 of the newly excavated foundation pit 300 are constructed. Diagonal braces 240 are installed at intervals between the top of the concrete cap beam 110 and the side wall of the existing building basement 310 for support. Steel support columns 160 are inserted into the top of the backfill soil, extending to the top of the existing building basement 320. Pairs of supporting steel sections 170 are installed inside the steel support columns 160, and two adjacent supporting steel sections 170 are connected by intermittently arranged connecting steel plates 180. Then, a grouting pipe is installed on the top of the backfill soil for concrete grouting treatment to obtain a grout-cured backfill layer 120. This grout-cured backfill layer 120 extends to the side and top of the existing building basement 320. The bottom elevation of the grout-cured backfill layer 120 and the steel support columns 160 is the foundation surface, and the top elevation is the bottom surface of the first basement floor slab of the existing building basement 310. After the grouting and curing backfill layer 120 reaches the preset strength, the excavation is carried out again to the bottom surface of the first basement floor slab of the existing building basement 310. After the reinforcing steel plate 200 and reinforcing steel bar 210 are tied and fixed to the top of each pair of supporting steel 170, the plain concrete slab 130 is constructed on the top surface of the grouting and curing backfill layer 120 to obtain the side wall of the foundation pit support pile 100 and the side wall of the first basement floor slab of the existing building basement 310. After the concrete strength of the plain concrete slab 130 reaches the standard, the backfill layer 140 is constructed on the top of the plain concrete slab 130 until it is flush with the bottom surface of the concrete cap beam 110. Then, C20 concrete is sprayed on the top surface of the backfill layer 140 to obtain the concrete surface layer 150.

[0030] The trench reinforcement structure provided in this application embodiment is constructed by injecting concrete grout into the backfill soil between the foundation pit support piles 100 of the newly excavated foundation pit 300 and the existing building basement 310 to obtain a grout-cured backfill soil layer 120 for support. A steel support column 160 with an internal supporting steel section 170 is constructed on the top of the existing building strip foundation 320. A plain concrete slab 130 is constructed between the top side wall of the foundation pit support piles 100 and the side wall of the first basement floor slab of the existing building basement 310 for connection. The bottom of the plain concrete slab 130 is connected and supported by the steel support column 160. Thus, the plain concrete slab 130 connects the foundation pit support piles 100 and the existing building basement 310 to form a reliable force transmission path to transmit stress. The steel support column 160 supports the plain concrete slab 130 to ensure stable stress transmission. This ensures that there is a necessary reaction force between the existing building basement 310 and the foundation pit support piles 100 to ensure mutual support and stability, thereby improving the safety of the construction of the newly excavated foundation pit 300.

[0031] Specifically, diagonal braces 240 are installed at intervals between the top of the concrete cap beam 110 and the side wall of the existing basement 310 for support. This supports the side wall of the existing basement 310 through the diagonal braces 240, improving the stability of the existing basement 310. The steel support column 160 contains paired support steel sections 170, which are connected by intermittently arranged connecting steel plates 180. These connecting steel plates 180 form a single unit, and the combination of the connecting steel plates 180 and the support steel sections 170 enhances the structural strength of the steel support column 160 to stabilize the plain concrete slab 130. Intermittently arranged reinforcing steel plates 200 are embedded within the plain concrete slab 130. The top and bottom are respectively equipped with spaced reinforcing steel bars 210, which can improve the structural strength of the plain concrete slab 130 by using the reinforcing steel plate 200 and the reinforcing steel bars 210 to ensure the stability of force transmission. The top of each pair of supporting steel 170 extends into the plain concrete slab 130 and connects to a reinforcing steel plate 200. The connection between the supporting steel 170 and the reinforcing steel plate 200 can improve the structural strength of the connection between the steel support column 160 and the plain concrete slab 130, thereby ensuring the stable stress transmission between the steel support column 160 and the plain concrete slab 130 between the existing building basement 310 and the foundation pit support pile 100, and further transferring the stress between the existing building basement 310 and the foundation pit support pile 100 to the existing building strip foundation 320 for dispersion, thereby improving the structural stability of the foundation pit support pile 100 and the newly excavated foundation pit 300.

[0032] This application embodiment also provides a deep foundation pit support structure, which includes the above-mentioned trench reinforcement structure, reinforced concrete supports 220 spaced apart within the newly excavated foundation pit 300, and steel lattice columns 230 spaced apart within the newly excavated foundation pit 300. The reinforced concrete supports 220 are arranged in groups along the length of the newly excavated foundation pit 300, and each group includes three reinforced concrete supports 220 spaced apart along the height direction. One end of each reinforced concrete support 220 is connected to the inner wall of the foundation pit support pile 100 facing the newly excavated foundation pit 300. Each steel lattice column 230 is connected to three reinforced concrete supports 220 spaced apart along the height direction, and the top of each steel lattice column 230 is inserted into the concrete column at the bottom of the newly excavated foundation pit 300.

[0033] The deep foundation pit support structure provided in this application embodiment connects the foundation pit support piles 100 to the inner wall of the newly excavated foundation pit 300 by setting reinforced concrete supports 220, and uses steel lattice columns 230 to connect the reinforced concrete supports 220 arranged at intervals along the height direction. The steel lattice columns 230 and reinforced concrete supports 220 work together to provide stable support for the foundation pit support piles 100 on the outside of the newly excavated foundation pit 300, and work together with the above-mentioned trench reinforcement structure to ensure the structural stability and reliability of the foundation pit support piles 100.

[0034] In other alternative embodiments, the steel support column 160 may not be provided. Instead, plain concrete slabs 130 and diagonal braces 240 are used to support the foundation pit support piles 100 and concrete cap beams 110 between the foundation pit support piles 100 and the existing building basement 310. This can effectively improve construction efficiency and reduce the construction period while ensuring construction safety.

[0035] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A trench reinforcement structure comprising a foundation pit support pile provided between a newly excavated foundation pit and an existing building basement and a concrete crown beam connected to the top of each of the foundation pit support piles, characterized in that, It also includes a grouting and solidifying backfill soil layer located between the foundation pit support piles and the existing building basement. The grouting and solidifying backfill soil layer extends to the side and top of the existing building strip foundation. The top surface of the grouting and solidifying backfill soil layer is provided with a plain concrete slab connecting the side wall of the foundation pit support piles and the side wall of the existing building basement. The top of the plain concrete slab is provided with a backfill soil layer, and the top of the backfill soil layer is provided with a concrete surface layer flush with the concrete cap beam.

2. The furrower reinforcing structure of claim 1, wherein, The top of the existing building's base is connected to a steel support column, and the top of the steel support column is connected to the bottom of the plain concrete slab.

3. The furrower reinforcing structure of claim 2, wherein, The steel support column is provided with at least one pair of vertically arranged support steel sections, and the two adjacent support steel sections are connected by multiple connecting steel plates.

4. The furrower reinforcing structure of claim 3, wherein, At least one horizontally arranged reinforcing steel plate is embedded in the plain concrete slab, and the top and bottom of the reinforcing steel plate are respectively provided with multiple reinforcing bars.

5. The furrower reinforcing structure of claim 4, wherein, At least one pair of the supporting steel sections extends from the top into the plain concrete slab and connects to a reinforcing steel plate.

6. The furrower reinforcing structure of claim 1, wherein, The plain concrete slab is connected to the side wall of the basement floor of the existing building.

7. The furrower reinforcing structure of claim 1, wherein, Multiple diagonal braces connect the top of the concrete cap beam and the side wall of the existing building's basement.

8. A deep foundation pit support structure characterized by, It includes the fertilizer tank reinforcement structure as described in any one of claims 1 to 7.

9. The deep excavation support structure of Claim 8, wherein, It also includes multiple reinforced concrete supports with one end connected to the inner wall of the foundation pit support pile and multiple steel lattice columns, each of the steel lattice columns being connected to multiple reinforced concrete supports arranged at intervals along the height direction.

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