Double-row pile enclosure structure
The double-row pile enclosure structure forms a cantilever enclosure through the combination of front and rear piles and anchor cable system, which solves the construction interference problem of traditional support methods under large depths and complex geological conditions, and achieves the improvement of stability and waterproofness, which is suitable for underground projects.
Patent Information
- Application Number
- CN202421983763.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-08-15
AI Technical Summary
Traditional foundation pit support methods require a large amount of internal support under large depths and complex geological conditions, which affects the construction progress and increases risks, especially in areas with space limitations or dense underground pipelines, which are seriously disturbed.
A double-row pile enclosure structure is adopted. Through the combination of front and rear piles, the anchor cable system and waist beam support is combined to form a cantilever enclosure structure to avoid internal support. Combined with the optimization of the configuration of steel sheet piles and steel pipe piles, the waterproof performance is improved.
Provides stability and waterproofness, reduces construction interference, shortens construction period, and is suitable for underground projects with strict internal space requirements to avoid conflicts with underground pipelines.
Smart Images
Figure CN223305020U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of foundation pit enclosure, in particular to a double-row pile enclosure structure. Background Art
[0002] Against the backdrop of the rapid development of underground space engineering, the scale of foundation pit projects continues to expand. To ensure construction safety and stability, the design and implementation of support structures are becoming increasingly important. While traditional foundation pit support technologies, such as pile rows, soil nail walls, and underground diaphragm walls, can meet project requirements to a certain extent, these methods also have some shortcomings as the depth of the foundation pit increases and the complexity of the surrounding environment grows.
[0003] Existing foundation pit support methods include pile rows, soil nail walls, and anchor bolts. These methods often require extensive internal support structures when faced with deep pits and complex geological conditions, hindering construction progress and the utilization of underground space. Traditional support methods are particularly prone to disrupting construction efforts in areas with limited space or dense underground pipelines, increasing both difficulty and risk. Utility Model Content
[0004] To address these issues, the present invention provides a double-row pile enclosure structure. This technology utilizes a combination of front and rear rows of piles, coupled with an anchor cable system and waist beam support, to provide sufficient stability without the need for internal support. This method is particularly suitable for underground projects with stringent requirements for internal space, effectively reducing construction disruptions and shortening project durations. Furthermore, by optimizing the configuration of steel sheet piles and steel pipe piles, the double-row pile enclosure structure significantly improves waterproofing performance, meeting the needs of projects with demanding waterproofing requirements.
[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:
[0006] A double-row pile enclosure structure includes a front row of steel pipe piles, a front row of steel sheet piles, a front row of pile waist beams, a front row of waist beam supporting corbels, anchor cables, a front row of anchor heads, a rear row of anchor heads, a rear row of steel sheet piles, a rear row of steel pipe piles, a rear row of pile waist beams, and a plain concrete force transmission belt. It is characterized in that a front row of steel pipe piles is arranged between the front row of steel sheet piles, the front row of steel sheet piles and the rear row of piles are connected by anchor cables, the two ends of the anchor cables are respectively fixed to the outside of the front row of pile waist beams and the rear row of pile waist beams through the front row of anchor heads and the rear row of anchor heads, the front row of pile waist beams are supported and fixed by the front row of waist beam supporting corbels, and the whole forms a cantilever enclosure structure.
[0007] Furthermore, the rear row of piles can be steel sheet piles or steel pipe piles according to engineering requirements.
[0008] Furthermore, the distance between the front row of steel sheet piles and the rear row of steel sheet piles is greater than or equal to one times the excavation depth of the foundation pit.
[0009] Furthermore, the front row of steel pipe piles and the front row of steel sheet piles are constructed on the same vertical plane, and the two are connected by the tongue and groove of the steel pipe piles.
[0010] Furthermore, a plain concrete force transmission belt is provided between the front row of steel sheet piles and the proposed structure to support the front row of steel sheet piles; pit bottom reinforcement is constructed below the plain concrete force transmission belt and the proposed structure.
[0011] Furthermore, the anchor cable structure may be made of prestressed steel strands or steel bars; the front row and rear row steel sheet piles may be hot-rolled U-shaped steel sheet piles, driven in with a small lock.
[0012] Furthermore, the rear row of steel sheet piles may be arranged continuously or in groups of multiple groups. Preferably, the rear row of steel sheet piles may be constructed continuously or in intervals of two, three, or four groups. The rear row of steel pipe piles may be arranged at equal intervals. Between the rows of steel pipe piles, one or more groups of front row steel sheet piles may be arranged. The front row of steel sheet piles may be constructed in a manner such that one group of steel pipe piles is separated by one group of steel sheet piles, or one group of steel pipe piles is separated by two (or more) groups of steel sheet piles.
[0013] Correspondingly, this solution also provides a double-row pile retaining structure construction method for constructing the above-mentioned double-row pile retaining structure, comprising the following steps:
[0014] S1: Use pile driving machinery to install the front row steel pipe piles, front row steel sheet piles and rear row steel sheet piles in place;
[0015] S2: At the bottom of the foundation pit, a pit reinforcement of a certain depth and width is constructed in front of the front row of steel pipe piles and the front row of steel sheet piles; the pit bottom reinforcement can be carried out by cement soil mixing piles, high pressure rotary jet piles, and compaction grouting.
[0016] S3: Install the front row pile waist beam and the rear row pile waist beam at the corresponding positions of the front row steel sheet piles and the rear row steel sheet piles;
[0017] S4: A front row waist beam support bracket is set under the front row pile waist beam for fixation;
[0018] S5: erect anchor cables and secure the front row anchor heads;
[0019] S6: The anchor cables are prestressed and fixed with rear row anchor heads;
[0020] S7: Carry out foundation pit excavation construction, and construct the internal main structure after the foundation pit is excavated to the bottom. Plain concrete force transmission belts can be constructed during the construction of the internal main structure.
[0021] Furthermore, after the construction of the front and rear steel sheet piles is completed, C 20 The gap between the steel sheet piles and the waist beam is filled with early-strength fine stone concrete, and the filling height is the same as that of the front row pile waist beam and the rear row pile waist beam.
[0022] Furthermore, the anchor cable may pass through the front row steel sheet piles and the rear row steel sheet piles by drilling holes in the front row steel sheet piles and the rear row steel sheet piles or lowering the height of the steel sheet piles at the corresponding passing position.
[0023] The utility model has the following beneficial effects:
[0024] In this solution, the retaining structure formed by the front row of steel sheet piles and steel pipe piles is supported by the front row pile waist beams and the front row waist beam support brackets. The rear row piles are connected to the front row pile waist beams and the rear row pile waist beams by anchor cables. This structural form can provide sufficient stability without the need for internal support and is particularly suitable for underground projects with strict internal space requirements. The steel sheet piles and steel pipe piles in the double-row pile structure can effectively prevent groundwater infiltration. By using materials and construction techniques with good waterproof performance (such as plain concrete force transfer belts), the structure can ensure good waterproofness and meet the needs of projects with high waterproofing requirements.
[0025] The anchor cable system used in this solution allows for flexible adjustment, requiring minimal space for anchor cable placement, making it particularly suitable for sites with numerous surrounding pipelines. Traditional anchor bolting can conflict with or interfere with surrounding pipelines, but this solution overcomes this problem by connecting the front and rear rows of piles with their waist beams. The rear row of piles can be constructed using either steel sheet piles or steel pipe piles, depending on actual needs. The spacing between the front and rear rows of steel sheet piles can be adjusted, providing a flexible construction solution and helping to avoid complex underground pipelines and facilities.
[0026] This new double-row pile retaining structure is easy to construct and requires no maintenance, significantly reducing construction time. It offers reliable water-stopping, is environmentally friendly, and is recyclable. It eliminates the need for internal supports and anchors, which does not affect internal structural construction or surrounding pipeline construction. This new retaining structure is suitable for underground structures with high waterproofing requirements where internal supports are inconvenient to install, and for water supply and drainage station foundation pit retaining projects with numerous surrounding pipelines where anchors are inconvenient to install. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a cross-sectional view of the enclosure structure of Example 1 of the present utility model;
[0028] Figure 2 A plan view of the enclosure structure of Example 1 of the present utility model;
[0029] Figure 3 A three-dimensional diagram of the enclosure structure of Example 1 of the present utility model;
[0030] Figure 4 sectional views of the enclosure structures of Example 2, Example 3 and Example 4 of the present utility model;
[0031] Figure 5 A plan view of the enclosure structure of Example 2 of the present utility model;
[0032] Figure 6 A three-dimensional diagram of the enclosure structure of Example 2 of the present utility model;
[0033] Figure 7 This is a plan view of the enclosure structure of Example 3 of the present utility model;
[0034] Figure 8 A three-dimensional diagram of the enclosure structure of Example 3 of the present utility model;
[0035] Figure 9 A plan view of the enclosure structure of Example 4 of the present utility model;
[0036] Figure 10 A three-dimensional diagram of the enclosure structure of Example 4 of the present utility model;
[0037] Figure 11 This is a structural diagram of a steel pipe pile of the present utility model;
[0038] Figure 12 This is the rear row steel sheet pile anchoring diagram of the utility model;
[0039] Figure 13 This is the anchoring diagram of the front row of steel sheet piles of the present invention.
[0040] Numbers in the figure:
[0041] 1. Front row steel pipe piles; 2. Rear row steel sheet piles; 3. Anchor cables; 4. Front row pile waist beams; 5. Rear row pile waist beams; 6. Front row anchor heads; 7. Rear row anchor heads; 8. Plain concrete force transmission belts; 9. Pit bottom reinforcement; 10. Proposed structure; 11. Front row steel sheet piles; 12. Front row waist beam support corbels; 13. Steel pipe pile tongue and groove; 14. Rear row steel pipe piles. DETAILED DESCRIPTION
[0042] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.
[0043] Example 1
[0044] Please refer to Figure 1 , Figures 2 and 3 , Figures 11 to 13This embodiment discloses a double-row pile enclosure structure and a construction method thereof, including a front row steel pipe pile 1, an anchor cable 3, a front row pile waist beam 4, a rear row pile waist beam 5, a front row anchor head 6, a rear row anchor head 7, a plain concrete force transmission belt 8, a front row steel sheet pile 11, a rear row steel pipe pile 14, and a front row waist beam support corbel 12.
[0045] A piling machine is used to construct the front row steel pipe piles 1, the front row steel sheet piles 11, and the rear row steel pipe piles 14 in place; a pit bottom reinforcement 9 of a certain depth and width is constructed at the bottom of the foundation pit and in front of the front row steel pipe piles 1 and the front row steel sheet piles 11; a front row pile waist beam 4 and a rear row pile waist beam 5 are erected at the corresponding positions of the front row steel sheet piles 11 and the rear row steel pipe piles 14; the front row pile waist beam 4 is fixed with a front row waist beam support corbel 12; an anchor cable 3 is erected and fixed with a front row anchor head 6; prestressing is applied to the anchor cable 3 and fixed with a rear row anchor head 7 to form a cantilever retaining structure; foundation pit excavation construction is carried out, and the internal main structure 10 is constructed after the foundation pit is excavated to the bottom, and a plain concrete force transmission belt 8 can be constructed during the construction of the internal main structure 10.
[0046] Furthermore, the front row of steel pipe piles 1 and the front row of steel sheet piles 11 are installed alternately at intervals, and the front row of steel pipe piles 1 and the front row of steel sheet piles 11 are connected by a steel pipe pile tongue and groove.
[0047] Furthermore, the distance between the front row of steel pipe piles 1 and the front row of steel sheet piles 11 and the rear row of steel pipe piles 14 is greater than or equal to one time of the foundation pit excavation depth.
[0048] Furthermore, a plain concrete force transmission belt 8 may be provided between the front row of steel pipe piles 1 and the front row of steel sheet piles 11 and the proposed structure 10 to support the front row of steel sheet piles.
[0049] Furthermore, the anchor cable 3 should be prestressed when connected, and the soil should be backfilled after the front pile waist beam 4, the rear pile waist beam 5, the front anchor head 6, and the rear anchor head 7 are fixed at both ends.
[0050] Furthermore, the anchor cable 3 structure may be made of prestressed steel strands or steel bars.
[0051] Furthermore, the front row of steel sheet piles 11 are hot-rolled U-shaped steel sheet piles, which are driven in with a small lock mouth.
[0052] Furthermore, after the construction of the front row steel sheet piles 11 and the rear row steel pipe piles 14 is completed, C 20 The gap between the steel sheet piles and the waist beam is filled with early-strength fine stone concrete, and the filling height is the same as the front row pile waist beam 4 and the rear row steel pipe pile waist beam 5.
[0053] Furthermore, the anchor cable 3 passes through the front row steel sheet piles 11 and the rear row pipe sheet piles 14 by drilling holes in the front row steel sheet piles 11 or lowering the height of the steel sheet piles at the corresponding passing position.
[0054] Furthermore, the rear row of steel pipe piles 2 are constructed at equal intervals.
[0055] Furthermore, according to the soil conditions and the requirements for controlling the deformation of the foundation pit, a pit bottom reinforcement 9 of a certain depth and width can be constructed at the bottom of the foundation pit, in front of the front row of steel pipe piles 1 and the front row of steel sheet piles 11. The pit bottom reinforcement 9 can be made of cement soil mixing piles, high-pressure rotary jet piles, and compaction grouting.
[0056] The construction method of this embodiment includes the following but not limited to the following steps: using a pile driving machine to construct the front row steel pipe piles 1, the front row steel sheet piles 11, and the rear row steel pipe piles 2 in place; constructing a pit bottom reinforcement 9 of a certain depth and width in front of the foundation pit bottom, the front row steel pipe piles 1, and the front row steel sheet piles 11; erecting the front row pile waist beams 4 and the rear row pile waist beams 5 at the corresponding positions of the front row steel sheet piles 11 and the rear row steel pipe piles 2, and the front row pile waist beams 4 are fixed with the front row waist beam support corbels 12; erecting the anchor cable 3, and fixing the front row anchor head 6; applying prestress to the anchor cable 3, and fixing it with the rear row anchor head 7 to form a cantilever retaining structure; carrying out foundation pit excavation construction, and constructing the internal main structure 10 after the foundation pit is excavated to the bottom, and a plain concrete force transmission belt 8 can be constructed during the construction of the internal main structure 10.
[0057] Example 2
[0058] See Figures 4 to 6 , Figures 11 to 13 The rear row of steel sheet piles 2 is constructed in a continuous manner. The anchor cable 3 passes through the front row of steel sheet piles 11 and the rear row of steel sheet piles 2. This can be achieved by drilling holes in the front row of steel sheet piles 11 and the rear row of steel sheet piles 2 or lowering the height of the steel sheet piles at the corresponding crossing position. The rest is the same as in Example 1.
[0059] Example 3
[0060] See Figure 4 、 Figure 6 、 Figure 8 , Figures 11 to 13 The front row construction adopts a group of steel pipe piles 1 and two groups of steel sheet piles 11. The rest is the same as in Example 2.
[0061] Example 4
[0062] See Figure 4 、 Figure 9 、 Figure 10 , Figures 11 to 13 Furthermore, the rear row of steel sheet piles 2 is constructed in three groups at intervals.
Claims
1. A double-row pile enclosure structure, characterized in that: The invention comprises a front row steel pipe pile (1), a front row steel sheet pile (11), a front row pile waist beam (4), a front row waist beam supporting bracket (12), an anchor cable (3), a front row anchor head (6), a rear row anchor head (7), a rear row steel sheet pile (2), a rear row steel pipe pile (14), a rear row pile waist beam (5), and a plain concrete force transmission belt (8). The front row steel pipe pile (1) is arranged between the front row steel sheet piles (11). The front row steel sheet piles (11) and the rear row piles are connected by an anchor cable (3). The two ends of the anchor cable (3) are respectively fixed to the outside of the front row pile waist beam (4) and the rear row pile waist beam (5) through the front row anchor head (6) and the rear row anchor head (7). The front row pile waist beam (4) is supported and fixed by the front row waist beam supporting bracket (12), and the whole forms a cantilever type enclosure structure.
2. The double-row pile enclosure structure according to claim 1, characterized in that: The rear row piles can be selected from steel sheet piles or steel pipe piles according to engineering needs.
3. The double-row pile enclosure structure according to claim 2, characterized in that: The distance between the front row of steel sheet piles (11) and the rear row of steel sheet piles (2) is greater than or equal to one time the excavation depth of the foundation pit.
4. The double-row pile enclosure structure according to claim 1, characterized in that: The front row of steel pipe piles (1) and the front row of steel sheet piles (11) are constructed on the same vertical plane, and the two are connected by a steel pipe pile tongue and groove (13).
5. The double-row pile enclosure structure according to claim 1, characterized in that: A plain concrete force transmission belt (8) is provided between the front row steel sheet piles (11) and the proposed structure (10) to support the front row steel sheet piles (11); and a pit bottom reinforcement (9) is constructed below the plain concrete force transmission belt (8) and the proposed structure (10).
6. The double-row pile enclosure structure according to claim 1, characterized in that: The anchor cable (3) structure may be made of prestressed steel strands or steel bars; the front row steel sheet piles (11) and the rear row steel sheet piles (2) are made of hot-rolled U-shaped steel sheet piles, which are driven in with a small lock.
7. The double-row pile enclosure structure according to claim 1, characterized in that: The rear row steel sheet piles (2) are arranged continuously or multiple groups of rear row steel sheet piles (2) are arranged at intervals; the rear row steel pipe piles (14) are arranged at equal intervals; and a single group or multiple groups of front row steel sheet piles (11) are arranged between the rows of steel pipe piles (1).