Collapsible loess foundation treatment structure
By using a composite structure of a grey soil cushion layer and an anti-seepage film in the wet loess foundation and the method of adding dry mixing materials in the pre-pressed pile holes, the stability of the wet loess foundation under water wetness and the problem of mixing the dry mixing materials with the soil during filling and compaction, and the effect of improving the foundation bearing capacity and stability is achieved.
Patent Information
- Application Number
- CN202421500780.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The wet loess foundation is prone to voids under water wettability, which reduces structural stability. The dry-mixed material is easily mixed with the soil in the pre-pressed pile hole during filling and compaction, affecting performance and stability.
A composite foundation structure of ash soil cushion layer and an anti-seepage film is adopted. The foundation bearing capacity and stability are improved through the setting of geo-seepage film A and a dust soil cushion layer, and dry mixing materials are added in the pre-pressed pile hole through the guard to prevent soil from entering the dry mixing materials.
Effectively prevent water from seeping into the foundation, eliminate loess sinking, improve the bearing capacity and stability of wet loess, and ensure that the performance and structural stability of dry-mixed materials meet the design requirements.
Smart Images
Figure CN222834885U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, in particular to a collapsible loess foundation treatment structure. Background Art
[0002] Once the loess foundation collapses, it will easily cause safety accidents. Therefore, the methods and effects of handling the wind turbine hoisting site in the thick collapsible loess area will directly affect the safety and progress of the main crane assembly, wind turbine installation project, and main crane dismantling, including the settlement during the later operation period, which will also have a great impact on the quality of the project. Therefore, preventing loess from collapsing, that is, maintaining the stability of the bearing capacity of the collapsible loess foundation, is of great significance and engineering application value for the normal advancement of the hoisting section of the wind power project.
[0003] When the existing technical solution is used,
[0004] (1) Collapsible loess is easily soaked by water, which can cause cavities in the foundation, further reducing the structural stability of the foundation;
[0005] (2) When the dry-mixed materials are filled into the preloaded pile holes in stages and compacted by equipment, they will touch the inner wall of the preloaded pile holes, causing the soil on the inner wall to be mixed into the dry-mixed materials, which can easily lead to the destruction of the performance and structural stability of the dry-mixed materials and fail to meet the design requirements.
[0006] In view of the above problems, the utility model provides a collapsible loess foundation treatment structure. Utility Model Content
[0007] The purpose of the utility model is to provide a structure for treating collapsible loess foundation. The utility model can adopt a composite foundation of a ash soil cushion layer and an impermeable membrane. The ash soil cushion layer can improve the bearing capacity of the foundation. The impermeable membrane has excellent impermeability, which can prevent water from penetrating into the foundation, eliminating the problem of loess collapse from the source, thereby improving the bearing capacity and stability of collapsible loess. Dry-mixed materials can be added to the pre-pressed pile holes through casings, which can avoid the soil on the inner wall of the foundation from entering the dry-mixed materials when the dry-mixed materials are compacted at each stage, affecting the design requirements, thereby solving the problems in the background technology.
[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a collapsible loess foundation treatment structure, comprising a foundation body, the bottom of the foundation body is fixedly connected to a collapsible loess layer, the top of the collapsible loess layer is fixedly connected to a geotechnical impermeable membrane A, the top of the geotechnical impermeable membrane A is fixedly connected to a lime soil cushion layer, the top of the lime soil cushion layer is fixedly connected to a geotechnical impermeable membrane B, a plurality of pre-stressed pile holes are opened on the top of the foundation body, and the inner side walls of the pre-stressed pile holes are slidably connected to casings.
[0009] Furthermore, a first flange is fixedly connected to the top of the casing, and a threaded hole is provided on the top of the first flange, thereby achieving a threaded connection effect.
[0010] Furthermore, the top of the first flange is fixedly connected to the second flange, and the top of the second flange is fixedly connected to a connection constraint structure, thereby achieving a constraint effect.
[0011] Furthermore, a lubricating layer is fixedly connected to the outer surface of the casing, and the casing is made of steel, thereby achieving an effect of enhancing rigidity.
[0012] Furthermore, the geotextile A is manually laid, and the geotextile must overlap by at least 200 mm before overlapping. The geotextile is sewn with an overlap length of not less than 200 mm, and a repair overlap length of not less than 300 mm, thereby achieving the maximum laying effect.
[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0014] The utility model provides a collapsible loess foundation treatment structure.
[0015] (1) Through the setting of geotechnical anti-seepage membrane A and lime soil cushion layer, the effect of improving stability is achieved during use. A composite foundation of lime soil cushion layer and anti-seepage membrane can be adopted. The lime soil cushion layer can improve its foundation bearing capacity. The geotechnical anti-seepage membrane A can fully limit the lateral displacement of soil particles through friction with the soil, increase the stability of the soil, prevent water from seeping into the foundation, eliminate the problem of loess collapse from the source, and improve the bearing capacity and stability of collapsible loess.
[0016] (2) Through the provision of casing and preloaded pile holes, a protective effect is achieved during use. Dry-mixed materials can be added to the preloaded pile holes through the casing, which can prevent the soil on the inner wall of the foundation from entering the dry-mixed materials when the dry-mixed materials are compacted at each stage, thereby affecting the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the basic body of the utility model;
[0018] Figure 2 This is a schematic diagram of the casing of the utility model;
[0019] Figure 3 This is a schematic diagram of the first flange of the utility model;
[0020] Figure 4 It is a schematic diagram of geotechnical anti-seepage membrane A of the utility model.
[0021] In the figure: 1. foundation body; 2. collapsible loess layer; 3. geotechnical anti-seepage membrane A; 4. lime soil cushion layer; 5. geotechnical anti-seepage membrane B; 6. preloaded pile hole; 7. casing; 8. first flange; 9. second flange; 10. connection constraint structure; 101. bolts; 102. connecting column; 103. connecting hole; 11. lubricating layer. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] In order to solve the problem of how to effectively locate and adjust the technology, such as Figure 1-4 As shown, the following preferred technical solutions are provided:
[0024] A collapsible loess foundation treatment structure, comprising a foundation body 1, a collapsible loess layer 2 is fixedly connected to the bottom of the foundation body 1, a geotechnical anti-seepage membrane A3 is fixedly connected to the top of the collapsible loess layer 2, a lime soil cushion layer 4 is fixedly connected to the top of the geotechnical anti-seepage membrane A3, and a geotechnical anti-seepage membrane B5 is fixedly connected to the top of the lime soil cushion layer 4. By setting the geotechnical anti-seepage membrane A3 and the lime soil cushion layer 4, a composite foundation of the lime soil cushion layer 4 and the anti-seepage membrane can be adopted, and the lime soil cushion layer 4 can improve its foundation bearing capacity. The geotechnical anti-seepage membrane A3 can fully limit the lateral displacement of soil particles through friction with the soil body, and can increase the stability of the soil body. The force can make up for the defect of insufficient tensile strength of the soil, prevent water from seeping into the foundation, eliminate the problem of loess collapse from the source, improve the bearing capacity and stability of collapsible loess, thereby achieving a stable and safe effect. A plurality of pre-stressed pile holes 6 are opened on the top of the foundation body 1, and the inner wall of the pre-stressed pile hole 6 is slidably connected with a casing 7. Through the arrangement of the pre-stressed pile hole 6 and the casing 7, dry-mixed materials can be added into the pre-stressed pile hole 7 through the casing 6, which can avoid the soil on the inner wall of the foundation body 1 from participating in the dry-mixed materials when the dry-mixed materials are compacted at each stage, affecting the design requirements, thereby achieving a protective effect.
[0025] Specifically, the casing 7 can be placed inside the preloaded pile hole 6, and the dry-mixed material can be added into the preloaded pile hole 6 through the casing 7, so as to avoid the soil on the inner wall of the foundation body 1 from being mixed into the dry-mixed material when the dry-mixed material is compacted at each stage.
[0026] Further, such as Figure 3 As shown, the following preferred technical solutions are provided:
[0027] The top of the casing 7 is fixedly connected with a first flange 8, and a threaded hole is provided on the top of the first flange 8. The purpose of this design is to align the first flange 8 with the second flange 9 through the threaded hole, thereby achieving a fixed connection effect.
[0028] Further, such as Figure 3 As shown, the following preferred technical solutions are provided:
[0029] The top of the first flange 8 is fixedly connected to the second flange 9, and the top of the second flange 9 is fixedly connected to the connection constraint structure 10. The purpose of this design is to fix the casing 7 to the equipment through the connection constraint structure 10, thereby achieving a connection effect.
[0030] Further, such as Figure 3 As shown, the following preferred technical solutions are provided:
[0031] The outer surface of the casing 7 is fixedly connected with a lubricating layer 11, and the casing 7 is made of steel. The purpose of this design is to place or pull the casing 7 into or out of the pre-pressed pile hole 6 through the lubricating layer 11, thereby achieving a lubricating effect.
[0032] Further, such as Figure 4 As shown, the following preferred technical solutions are provided:
[0033] The geotextile A3 is laid manually. Before overlapping, the geotextile must overlap by at least 200mm. The geotextile is sewn with an overlap length of not less than 200mm and a repair overlap length of not less than 300mm. The purpose of this design is to improve the use effect of the geotextile A3 and the geotextile B5, thereby achieving the effect of splicing.
[0034] Embodiment 1;
[0035] See also Figure 3 The connection constraint structure 10 includes a bolt 101 threadedly connected to the top of the second flange 9. The bolt 101 can fix the first flange 8 and the second flange 9 to avoid disconnection between the first flange 8 and the second flange 9 when the casing 7 is pulled;
[0036] Embodiment 2:
[0037] See also Figure 3 The connection constraint structure 10 includes a connection column 102 fixedly connected to the second flange 9, and a connection hole 103 is fixedly connected inside the connection column 102. The connection hole 103 and the connection column 102 can connect the casing 7 to the equipment, and can easily pull the casing 7 out from the inside of the pre-pressed pile hole 6;
[0038] In summary:
[0039] 1. The foundation is a collapsible loess layer 2, and then the first layer of geotechnical anti-seepage membrane A3 and the lime soil cushion layer 4 are laid thereon respectively. The geotechnical anti-seepage membrane A3 can basically block the upper layer moisture from being transferred to the collapsible loess layer 2 due to its own small permeability coefficient, thereby ensuring the dryness of the soil, reducing the influence of moisture on the collapsible loess layer 2 and the foundation body 1, enhancing the stability of the soil, and improving the bearing capacity of the collapsible loess layer 2. In addition, the geotechnical anti-seepage membrane A3 can fully limit the lateral displacement of soil particles through friction with the soil, thereby increasing the stability of the soil and compensating for the defect of insufficient tensile strength of the soil.
[0040] 2. The casing 7 can be placed inside the pre-pressed pile hole 6, and the dry-mixed material can be added into the pre-pressed pile hole 6 through the casing 7, so as to avoid the soil on the inner wall of the foundation body 1 from being mixed into the dry-mixed material when the dry-mixed material is compacted at each stage;
[0041] 3. The first flange 8 and the second flange 9 are fixedly connected by bolts 101 to avoid disconnection between the first flange 8 and the second flange 9 when pulling the casing 7. The connecting hole 103 and the connecting column 102 can connect the casing 7 to the equipment, and the casing 7 can be easily pulled out from the inside of the preload pile hole 6.
[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0043] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A collapsible loess foundation treatment structure, comprising a foundation body (1), characterized in that: The bottom of the foundation body (1) is fixedly connected to a collapsible loess layer (2), the top of the collapsible loess layer (2) is fixedly connected to a geotechnical anti-seepage membrane A (3), the top of the geotechnical anti-seepage membrane A (3) is fixedly connected to a lime soil cushion layer (4), the top of the lime soil cushion layer (4) is fixedly connected to a geotechnical anti-seepage membrane B (5), and a plurality of pre-pressed pile holes (6) are opened on the top of the foundation body (1), and the inner side walls of the pre-pressed pile holes (6) are slidably connected to casings (7).
2. The collapsible loess foundation treatment structure according to claim 1, characterized in that: The top of the protective tube (7) is fixedly connected to a first flange (8), and a threaded hole is provided on the top of the first flange (8).
3. A collapsible loess foundation treatment structure according to claim 2, characterized in that: The top of the first flange (8) is fixedly connected to a second flange (9), and the top of the second flange (9) is fixedly connected to a connection constraint structure (10).
4. The collapsible loess foundation treatment structure according to claim 1, characterized in that: A lubricating layer (11) is fixedly connected to the outer surface of the casing (7), and the casing (7) is made of steel.
5. The collapsible loess foundation treatment structure according to claim 1, characterized in that: The geotextile A (3) is laid manually. Before overlapping, the geotextile must overlap by at least 200 mm. The geotextile is sewn with an overlap length of not less than 200 mm and a repair overlap length of not less than 300 mm.