Pi-shaped combined pile supporting structure
Through the π-type combined pile support structure, π-type combined piles are formed by using horizontal and vertical piles, and angle support and connecting beams are set up in right angle areas, which solves the problem of low construction efficiency of deep foundation pit support structures and achieves improvements in stability and space utilization.
Patent Information
- Application Number
- CN202422130922.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The existing deep foundation pit support structure has low construction efficiency and is easy to affect the safety of adjacent buildings and underground structures, and takes up a large space.
A π-type combined pile support structure is adopted, including horizontal piles and two rows of vertical piles, to form a π-type combined pile, and angle support and connecting beams are set up in right angle areas to form a stable frame system and enhance overall stiffness.
The construction efficiency of deep foundation pit support structure is improved, the impact on adjacent buildings is avoided, space occupied is reduced, and the stability and deformation resistance of the structure are enhanced.
Smart Images
Figure CN223088441U_ABST
Abstract
Description
Technical Field
[0001] This utility model patent relates to the technical field of support structures, and more specifically, to a π-shaped combined pile support structure. Background Art
[0002] The following schemes can be selected for deep foundation pit support structures: row pile prestressed anchor cable support structure, row pile second tie beam support structure, double (multi)-row pile support structure, diaphragm wall top-down method, etc.
[0003] For the row pile prestressed anchor cable support structure, the row piles can be cast-in-place piles, or secant piles, diaphragm walls, or precast piles (prestressed pipe piles, precast square piles), etc., to form a combined support structure with prestressed anchor cables. The disadvantage is that the prestressed anchor cables often extend outside the land use red line, which will affect the safety of adjacent buildings and structures, the construction of adjacent subways and underground structures, and the development of adjacent plots. In recent years, the use of prestressed anchor cables has been gradually restricted.
[0004] For the row pile second tie beam support structure, the row piles can be cast-in-place piles or secant piles, diaphragm walls, and the second tie beam can be a concrete second tie beam or a steel support, and the planar layout is in the form of opposite bracing, corner bracing, or circular bracing. For linear foundation pits, such as subway stations, open-cut sections, etc., a concrete opposite bracing (or steel support) support structure is often used. For block foundation pits, a combined support structure of concrete opposite bracing, corner bracing, and circular bracing is often used. The disadvantage is that the second tie beam often affects the construction of the civil engineering structure and requires bracing removal and replacement, which affects the construction progress.
[0005] The double (multi)-row pile support structure is a kind of cantilever pile support structure, which occupies little space. The disadvantage is that the applicable depth of the foundation pit is limited.
[0006] For the diaphragm wall top-down method, the diaphragm wall combines the functions of the foundation pit support wall and the basement exterior wall, and makes full use of the basement pile columns and floor slabs as the second tie beam, and the underground part and the above-ground part are constructed simultaneously. The disadvantage is that earth excavation is difficult, the construction progress is slow, and the construction technical requirements are high. Content of the Utility Model
[0007] The purpose of this utility model is to provide a π-shaped combined pile support structure, aiming to solve the problem of low construction efficiency of deep foundation pit support structures in the prior art.
[0008] The utility model is realized as follows. The π-shaped combined pile retaining structure includes a row of horizontal piles arranged along the perimeter of the foundation pit and two rows of vertical piles arranged longitudinally. The two rows of vertical piles are arranged at intervals. The two rows of vertical piles are formed in the foundation pit and are orthogonally butt-jointed with the horizontal piles to form a π-shaped combined pile. A right-angle area is enclosed between the two rows of vertical piles and the horizontal piles. A first corner support is provided in the right-angle area. One end of the first corner support is butt-jointed with the horizontal pile, and the other end is butt-jointed with the vertical pile.
[0009] Optionally, a first connecting beam is constructed between the two rows of vertical piles. The two ends of the first connecting beam are respectively butt-jointed to the two rows of vertical piles. Along the direction deviating from the horizontal pile, a plurality of the first connecting beams are arranged at intervals.
[0010] Optionally, the first connecting beam and the vertical pile are orthogonally butt-jointed.
[0011] Optionally, a capping beam is constructed on the top of the horizontal pile and the top of the vertical pile. The end of the corner support is butt-jointed to the capping beam.
[0012] Optionally, one or more lower-layer corner supports are also arranged in the right-angle area. One end of the lower-layer corner support is butt-jointed with the horizontal pile, and the other end is butt-jointed with the vertical pile. The first corner support and the plurality of lower-layer corner supports are arranged at intervals along the depth of the foundation pit.
[0013] Optionally, waist beams are respectively provided on the horizontal pile and the vertical pile. The two ends of the lower-layer corner support are respectively butt-jointed to the waist beams.
[0014] Optionally, the structure of the first corner support is the same as that of the lower-layer corner support, including two inclined supports arranged obliquely. The two inclined supports are arranged in parallel at intervals. One end of the inclined support is butt-jointed with the horizontal pile, and the other end is butt-jointed with the vertical pile.
[0015] Optionally, a second connecting beam is provided between the two parallel and spaced inclined supports. The two ends of the second connecting beam are respectively butt-jointed to the middle parts of the two inclined supports to form a butt-joint position.
[0016] Optionally, the second connecting beam and the inclined support are orthogonally butt-jointed.
[0017] Optionally, columns are arranged in the right-angle area. The columns are connected to the butt-joint position.
[0018] Compared with the prior art, the π-shaped combined pile support structure provided by the present utility model forms a π-shaped combined pile with a row of horizontal piles and two rows of vertical piles. It can be directly used as a foundation pit support structure, or angle supports can be set in the right-angle areas on both sides of the π-shaped combined pile to form a combined support structure for the foundation pit support with a greater depth. For the support of large deep foundation pits, setting one or more groups of π-shaped combined pile support structures in the middle section on each side of the foundation pit can ensure the stability of the foundation pit support structure; the vertical piles and angle supports are evenly arranged in the pit without exceeding the land use red line. After the underground structure construction is completed, the vertical piles, angle supports, etc. located in the pit will be demolished without occupying underground space.
[0019] Compared with the row pile prestressed anchor cable support structure, the support structure does not exceed the land use red line, avoiding damage to the underground structures, underground pipelines, and building foundations outside the land use red line.
[0020] Compared with the double (multi)-row pile cantilever pile support structure, it occupies less land area and better controls the deformation of the foundation pit.
[0021] Compared with the row pile second tie beam support structure, it avoids the large amount of long cross braces and long corner braces, which are difficult to construct and expensive. Description of the Drawings
[0022] Figure 1 is a plan view of the π-shaped combined pile support structure provided by the present utility model;
[0023] Figure 2 is a sectional view of the π-shaped combined pile support structure provided by the present utility model. Detailed Embodiment
[0024] In order to make the objectives, technical solutions, and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0025] The implementation of the present utility model will be described in detail below with specific embodiments.
[0026] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.
[0027] Referring to Figure 1-2 as shown, it is a preferred embodiment provided by the present utility model.
[0028] The π-shaped composite pile retaining structure provided by the present utility model includes a row of horizontal piles 100 arranged along the perimeter of the foundation pit and two rows of vertical piles 200 arranged longitudinally. The two rows of vertical piles 200 are arranged at intervals, and the two rows of vertical piles 200 are formed in the foundation pit and are orthogonally butt-jointed with the horizontal piles 100 to form a π-shaped composite pile; a right-angle area is enclosed between the two vertical piles 200 and the horizontal piles 100 respectively, and a first-layer corner support is provided in the right-angle area. One end of the first-layer corner support is butt-jointed with the horizontal pile, and the other end of the first-layer corner support is butt-jointed with the vertical pile 200.
[0029] The above-mentioned horizontal piles 100 and two rows of vertical piles 200 form a π-shaped composite pile, which can be directly used as a foundation pit retaining structure, or corner supports can be set in the right-angle areas on both sides of the π-shaped composite pile to form a combined retaining structure for the retaining of deeper foundation pits. For the retaining of large deep foundation pits, setting a group or multiple groups of π-shaped composite pile retaining structures in the middle section of each side of the foundation pit can ensure the stability of the foundation pit retaining structure; the vertical piles 200 and corner supports are evenly arranged in the pit and do not exceed the land use red line. After the underground structure construction is completed, the vertical piles 200, corner supports, etc. located in the pit will be demolished and do not occupy underground space.
[0030] Compared with the row pile prestressed anchor cable retaining structure, the retaining structure does not exceed the land use red line, avoiding damage to the underground structures, underground pipelines, and building foundations outside the land use red line.
[0031] Compared with the double (multi)-row pile cantilever pile retaining structure, it occupies less land area and better controls the deformation of the foundation pit.
[0032] Compared with the row pile second tie beam 310 retaining structure, it avoids the large amount of long cross braces and long corner braces, which are difficult to construct and expensive.
[0033] A first tie beam 210 is constructed between the two rows of vertical piles 200. The two ends of the first tie beam 210 are respectively butt-jointed on the two rows of vertical piles 200, and multiple first tie beams 210 are arranged at intervals along the direction deviating from the horizontal pile 100. In this way, the connection of the multiple first tie beams 210 and the vertical piles 200 forms a more stable frame system, enhancing the overall stiffness of the retaining structure and being beneficial to resisting the horizontal displacement and deformation generated during the foundation pit excavation process.
[0034] The first connecting beam 210 and the vertical row of piles 200 are orthogonally butted. In this way, the first connecting beam 210 and the vertical row of piles 200 arranged orthogonally form a stable grid structure. This enhances the lateral stiffness of a single vertical row of piles 200 and effectively transfers and disperses the forces between the vertical row of piles 200 through the first connecting beam 210, thereby improving the overall stiffness of the entire supporting structure. This makes the supporting structure more stable when bearing external loads and reduces the risk of deformation and displacement.
[0035] Specifically, a capping beam 110 is constructed on the top of the horizontal row of piles 100 and the top of the vertical row of piles 200, and the ends of the corner braces are butted on the capping beam 110.
[0036] In this embodiment, one or more lower-layer corner braces are also arranged in the right-angle area. One end of the lower-layer corner brace is butted with the horizontal row of piles, and the other end of the lower-layer corner brace is butted with the vertical row of piles 200. The first-layer corner brace and multiple lower-layer corner braces are arranged at intervals along the depth of the foundation pit. In this way, as the depth of the foundation pit increases, according to the design of the supporting structure, multiple excavations are carried out to construct the waist beam 120 and the lower-layer corner braces of the lower layer, forming a multi-layer second connecting beam 310 structure.
[0037] The horizontal row of piles 100 and the vertical row of piles 200 are respectively provided with a waist beam 120, and both ends of the lower-layer corner brace are respectively butted on the waist beam 120. In this way, the lower-layer corner brace is butted through the waist beam 120 to form a multi-layer second connecting beam 310 structure.
[0038] The structure of the first-layer corner brace is the same as that of the lower-layer corner brace, including two inclined braces 300 arranged obliquely. The two inclined braces 300 are arranged in parallel at intervals. One end of the inclined brace 300 is butted with the horizontal row of piles 100, and the other end of the inclined brace 300 is butted with the vertical row of piles 200. In this way, a stable triangular support system is formed. This structure performs excellently in resisting horizontal loads, can significantly improve the lateral stiffness of the structure, and reduce the horizontal displacement of the structure.
[0039] A second connecting beam 310 is arranged between the two parallel and spaced inclined braces 300. Both ends of the second connecting beam 310 are respectively butted in the middle of the two inclined braces 300 to form a butting position. In this way, the second connecting beam 310 connects the two inclined braces 300. The second connecting beam 310, as an additional support member, works together with the inclined braces 300 to significantly enhance the overall stiffness of the supporting structure.
[0040] Specifically, the second connecting beam 310 and the inclined brace 300 are orthogonally butted
[0041] In the right-angle area, there are columns 320 arranged, and the columns 320 are connected to the docking positions. In this way, the columns 320 are connected to the docking positions, further enhancing the strength of the second connecting beam 310 and the inclined support 300, and improving the overall stiffness of the support structure.
[0042] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. The π-shaped combined pile retaining structure is characterized in that It includes horizontal row piles arranged along the perimeter of the foundation pit and two rows of vertical row piles arranged longitudinally, with a space between the two rows of the vertical row piles. The two rows of the vertical row piles are formed in the foundation pit and are orthogonally butt-jointed with the horizontal row piles to form a π-shaped composite pile. Right-angle areas are enclosed between the two rows of the vertical row piles and the horizontal row piles respectively. A first corner support is provided in the right-angle area, with one end of the first corner support butt-jointed with the horizontal row pile and the other end butt-jointed with the vertical row pile.
2. The π-shaped combined pile retaining structure according to claim 1, wherein, A first tie beam is constructed between the two rows of the vertical row piles, with both ends of the first tie beam butt-jointed on the two rows of the vertical row piles respectively. Along the direction deviating from the horizontal row pile, a plurality of the first tie beams are arranged at intervals.
3. The π-shaped combined pile retaining structure according to claim 2, characterized in that, The first tie beam and the vertical row pile are orthogonally butt-jointed.
4. The π-shaped combined pile retaining structure according to claim 1, characterized in that, A capping beam is constructed on the top of the horizontal row pile and the top of the vertical row pile, and the end of the corner support is butt-jointed on the capping beam.
5. The π-shaped combined pile retaining structure according to claim 1, characterized in that, One or more lower-layer corner supports are also arranged in the right-angle area, with one end of the lower-layer corner support butt-jointed with the horizontal row pile and the other end butt-jointed with the vertical row pile. The first corner support and the plurality of lower-layer corner supports are arranged at intervals along the depth of the foundation pit.
6. The π-shaped combined pile retaining structure according to claim 5, characterized in that, Waist beams are respectively provided on the horizontal row pile and the vertical row pile, and both ends of the lower-layer corner support are butt-jointed on the waist beams.
7. The π-shaped combined pile retaining structure according to claim 6, wherein, The structure of the first corner support is the same as that of the lower-layer corner support, including two inclined supports arranged obliquely, with the two inclined supports arranged in parallel at intervals. One end of the inclined support is butt-jointed with the horizontal row pile and the other end is butt-jointed with the vertical row pile.
8. The π-shaped combined pile retaining structure according to claim 7, characterized in that, A second tie beam is provided between the two parallel and spaced inclined supports, with both ends of the second tie beam butt-jointed in the middle of the two inclined supports respectively to form a butt-joint position.
9. The π-shaped combined pile retaining structure according to claim 8, characterized in that, The second tie beam and the inclined support are orthogonally butt-jointed.
10. The π-shaped combined pile retaining structure according to claim 8, wherein, Columns are arranged in the right-angle area, and the columns are connected with the butt-joint position.