A construction structure for recyclable micro-rubble piles and micro-rubble piles

Abstract

This utility model discloses a construction structure for recyclable micro-gravel piles and the micro-gravel pile itself. The recyclable micro-gravel pile construction structure includes a hollow bamboo tube, a stainless steel tube, and a precast pile tip. The stainless steel tube is fitted over the hollow bamboo tube, and the bottom of the hollow bamboo tube is fixed to the top center of the precast pile tip. The bottom of the inner cavity of the stainless steel tube has a connecting thread, and the top sidewall of the precast pile tip has a connecting thread. The stainless steel tube and the precast pile tip are threaded together. The hollow bamboo tube is filled with reinforcing concrete, and the annular cavity between the stainless steel tube and the hollow bamboo tube is filled with drainage gravel. This utility model, while ensuring the bearing strength, stability, and drainage performance of the pile body, achieves manual rotation and recycling of the stainless steel tube without the need for large equipment. It is easy to operate, improves the utilization rate of metal resources, reduces engineering costs, and is suitable for small-scale projects and construction scenarios where equipment access is difficult.

Description

Technical Field

[0001] This utility model belongs to the field of foundation engineering, and in particular relates to a crushed stone pile construction structure and a crushed stone pile. Background Technology

[0002] In foundation treatment for small and medium-sized buildings, roads, and pipelines, micro-gravel piles have become a common method for solving settlement and seepage problems in poor foundations due to their simple construction, low cost, significant reinforcement effect, and natural drainage properties. However, the metal components (such as protective and reinforcing cylinders) of traditional micro-gravel piles are often firmly bonded to the pile body and soil, making them impossible to separate and recycle after pile completion. This not only wastes metal resources and increases overall project costs but also may hinder construction progress during subsequent site leveling and renovation due to the difficulty in removing discarded metal components.

[0003] Existing recyclable pile structures often rely on specialized large-scale equipment for recovery, which is complex, costly, and lacks a recovery mechanism designed for manual operation, making them unsuitable for small projects or scenarios where equipment access is difficult. Furthermore, traditional pile structures often prioritize load-bearing stability while neglecting drainage performance, or compromise structural robustness to ensure drainage. Additionally, the connection methods between metal components and other parts are often unreasonable, resulting in either weak connections affecting structural stability or overly tight connections that prevent recovery. Therefore, there is an urgent need for a micro-gravel pile structure that combines drainage performance, structural stability, and the ability to be easily recovered manually using a stainless steel cylinder, addressing the pain points of traditional technologies. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the deficiencies and defects mentioned in the background art above, and to provide a recyclable micro (generally no more than 4m in length) crushed stone pile construction structure and micro crushed stone pile. Under the premise of ensuring the bearing strength, stability and drainage performance of the pile body, it can realize the manual rotation and recycling of the stainless steel cylinder without the need for large equipment, which is convenient to operate, improves the utilization rate of metal resources, reduces engineering costs, and is suitable for small projects and construction scenarios where equipment is difficult to enter the site.

[0005] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows:

[0006] A recyclable micro-gravel pile construction structure includes a hollow bamboo tube, a stainless steel tube, and a precast pile tip. The stainless steel tube is sleeved outside the hollow bamboo tube, and the bottom of the hollow bamboo tube is fixed to the top center of the precast pile tip. The bottom of the inner cavity of the stainless steel tube is provided with connecting threads, and the top sidewall of the precast pile tip is provided with connecting threads. The stainless steel tube and the precast pile tip are threadedly connected. The hollow bamboo tube is filled with reinforcing concrete, and the annular cavity between the stainless steel tube and the hollow bamboo tube is filled with drainage gravel.

[0007] This utility model discloses a recyclable micro-gravel pile construction structure, which is an intermediate construction structure, specifically comprising a hollow bamboo tube, a stainless steel tube, a precast pile tip, reinforcing concrete, and drainage gravel. The stainless steel tube is fitted over the hollow bamboo tube, forming a composite pile shell. The hollow bamboo tube serves as a load-bearing support layer, while preventing direct bonding between the grouting-injected reinforcing concrete and the stainless steel tube, thus providing a foundation for manual recycling. The bottom of the inner wall of the stainless steel tube has integrally formed connecting threads for spiral connection with the precast pile tip. This ensures connection stability during pile driving and use, and also allows for separation and recycling through rotation. The stable cavity provided by the stainless steel tube also ensures smooth filling of the drainage gravel. The precast pile tip is connected to the stainless steel tube via threads and simultaneously bonded to the hollow bamboo tube with concrete, providing double fixation to ensure the overall stability of the pile. The annular cavity between the stainless steel tube and the hollow bamboo tube is filled with drainage gravel. After the stainless steel tube is recycled, the continuous gaps formed by the drainage gravel serve as drainage channels, achieving the drainage function. The micro-gravel piles constructed using the recyclable micro-gravel pile construction structure of this utility model are ultimately reinforced with concrete, hollow bamboo tubes, and drainage gravel to form an integral load-bearing structure that balances load-bearing capacity and drainage performance.

[0008] In the above-mentioned recyclable micro-gravel pile construction structure, preferably, the inner cavity of the hollow bamboo tube is a hollow structure with all internal bamboo nodes removed.

[0009] In the above-mentioned recyclable micro-gravel pile construction structure, preferably, the hollow bamboo tube is fixed to the top center of the precast pile tip by concrete.

[0010] In the above-mentioned recyclable micro-gravel pile construction structure, preferably, the inner and outer surfaces of the hollow bamboo tube are coated with an anti-corrosion material layer.

[0011] In the above-mentioned recyclable micro-crushed stone pile construction structure, preferably, the top of the outer wall of the stainless steel cylinder is provided with an anti-slip protrusion or square interface that facilitates manual twisting, and the outer wall of the stainless steel cylinder has a smooth structure.

[0012] In the above-mentioned recyclable micro-gravel pile construction structure, preferably, the precast pile tip is a conical component, and the top sidewall of the precast pile tip is recessed and provided with connecting threads.

[0013] In the above-mentioned recyclable micro-gravel pile construction structure, more preferably, the hollow bamboo tube is made of natural moso bamboo, the cut length is determined according to the foundation treatment depth (usually 1-3m), the inner diameter is 100-180mm, and it is treated with tung oil for 48-72 hours or coated with environmentally friendly anti-corrosion coating to ensure that there is no obvious decay or deformation during the service life.

[0014] In the above-mentioned recyclable micro-gravel pile construction structure, more preferably, the stainless steel cylinder is made of 304 stainless steel with a thickness of 2-4mm, which not only ensures the structural strength of the pile shell, but also has good corrosion resistance and reusability; the upper end of the stainless steel cylinder is provided with anti-slip protrusions or square interfaces, which are convenient for manual gripping or recycling with the help of simple tools; the outer wall is smooth and has no adhesive structure, which reduces the frictional resistance with the soil during recycling.

[0015] In the above-mentioned recyclable micro-crushed stone pile construction structure, more preferably, the precast pile tip is made of reinforced concrete and is conical in shape. The top diameter is consistent with the outer diameter of the stainless steel cylinder. The upper end is inwardly recessed and has an external thread section that matches the internal thread of the stainless steel cylinder. The length of the external thread section is 50-80mm, and the thread profile is triangular thread.

[0016] In the above-mentioned recyclable micro-crushed stone pile construction structure, more preferably, the drainage crushed stone is selected from graded crushed stone with a particle size of 15-40mm, with continuous particle gradation, no soil impurities, and a porosity of 35%-45%, which is conducive to forming a continuous drainage channel.

[0017] In the above-mentioned recyclable micro-gravel pile construction structure, more preferably, the reinforcing concrete is fine stone concrete with a strength grade of not less than C25, the water-cement ratio is 0.45-0.6, and a layered grouting process is adopted during grouting.

[0018] As a general technical concept, this utility model also provides a micro-gravel pile obtained by constructing the above-mentioned recyclable micro-gravel pile construction structure, including a hollow bamboo tube and a precast pile tip. The bottom of the hollow bamboo tube is fixed to the top center of the precast pile tip. The hollow bamboo tube is filled with reinforcing concrete. The top of the precast pile tip and the outer wall of the hollow bamboo tube are filled with drainage gravel.

[0019] Compared with the prior art, the advantages of this utility model are:

[0020] 1. The recyclable micro-crushed stone pile construction structure and micro-crushed stone pile of this utility model can realize convenient manual recycling of stainless steel cylinders. The hollow bamboo tube isolates and reinforces the concrete and stainless steel cylinder. With the spiral connection design of the inner thread of the stainless steel cylinder and the precast pile tip, no large equipment is required for recycling. The stainless steel cylinder can be manually held and rotated to separate. The operation is simple and efficient. The recycled stainless steel cylinder can be reused multiple times after cleaning, which significantly improves the utilization rate of metal resources and reduces the project cost.

[0021] 2. The recyclable micro-gravel pile construction structure and micro-gravel pile of this utility model have both drainage performance and structural stability. The precast pile tip is threadedly connected to the stainless steel cylinder and bonded to the hollow bamboo tube concrete, which is a dual fixing method. It has good stability when driven into the soil. The drainage gravel filling layer forms a continuous drainage channel with excellent drainage performance. The overall load-bearing body formed by the hollow bamboo tube, reinforced concrete and drainage gravel has strong pull-out and compressive strength and excellent deformation resistance, which meets the dual requirements of bearing and drainage for the reinforcement of various poor foundations.

[0022] 3. The recyclable micro-gravel pile construction structure and micro-gravel pile of this utility model have wide applicability, outstanding economy and environmental protection. The stainless steel cylinder can be recycled without large equipment, making it suitable for small projects, narrow sites or construction scenarios where equipment is difficult to access. Bamboo cylinders are widely available and inexpensive, and the recycling and reuse of stainless steel cylinders reduces material costs. The overall structure is easy to construct, and the overall project cost is significantly reduced. At the same time, it reduces the generation of metal waste, and the drainage performance of the gravel pile can accelerate the consolidation of the foundation, combining environmental protection value and engineering practicality. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the construction structure of the recyclable micro-crushed stone pile as an example.

[0025] Figure 2 This is a schematic diagram of the structure of a miniature crushed stone pile as an example (drainage crushed stone is not shown).

[0026] Figure 3 This is a schematic diagram of the structure of a miniature crushed stone pile after it has been driven into the soil, as shown in the example.

[0027] Legend

[0028] 1. Hollow bamboo tube; 2. Stainless steel tube; 3. Connecting thread; 4. Precast pile tip; 5. Reinforced concrete; 6. Drainage gravel. Detailed Implementation

[0029] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0030] It should be noted that when a component is described as being "fixed to, attached to, connected to or connected to" another component, it can be directly fixed to, attached to, connected to or connected to the other component, or it can be indirectly fixed to, attached to, connected to or connected to the other component through other intermediate connectors.

[0031] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention.

[0032] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0033] Example:

[0034] like Figure 1 As shown, the recyclable micro-gravel pile construction structure of this embodiment includes a hollow bamboo tube 1, a stainless steel tube 2, and a precast pile tip 4. The stainless steel tube 2 is sleeved on the outside of the hollow bamboo tube 1. The bottom of the hollow bamboo tube 1 is fixed to the top center of the precast pile tip 4. The bottom of the inner cavity of the stainless steel tube 2 is provided with a connecting thread 3. The top side wall of the precast pile tip 4 is provided with a connecting thread 3. The stainless steel tube 2 and the precast pile tip 4 are threadedly connected. The hollow bamboo tube 1 is filled with reinforcing concrete 5. The annular cavity between the stainless steel tube 2 and the hollow bamboo tube 1 is filled with drainage gravel 6.

[0035] In this embodiment, the inner cavity of the hollow bamboo tube 1 is a hollow structure with all internal bamboo nodes removed.

[0036] In this embodiment, the hollow bamboo tube 1 is fixed to the top center of the precast pile tip 4 by concrete.

[0037] In this embodiment, both the inner and outer surfaces of the hollow bamboo tube 1 are coated with a layer of anti-corrosion material.

[0038] In this embodiment, the top of the outer wall of the stainless steel cylinder 2 is provided with anti-slip protrusions or square interfaces that facilitate manual twisting, and the outer wall of the stainless steel cylinder 2 has a smooth structure.

[0039] In this embodiment, the precast pile tip 4 is a conical component, and the top sidewall of the precast pile tip 4 is recessed and provided with connecting threads 3.

[0040] In this embodiment, more specifically, the stainless steel cylinder 2 is made of 304 stainless steel with a thickness of 3mm and a length of 3-4m. The inner wall is machined with triangular threads, and the upper end is provided with a square interface (the side length can be 60mm). The precast pile tip 4 is a C30 reinforced concrete precast component with an upper external thread section of 60mm in length, which matches the inner thread of the stainless steel cylinder 2. The hollow bamboo tube 1 has an inner diameter of 150mm-170mm and a length of 3-4m, and is treated with tung oil soaking for 72 hours for corrosion prevention. The drainage gravel 6 is made of granite gravel with a particle size of 15-40mm. The reinforcing concrete 5 is made of C25 fine stone concrete with a water-cement ratio of 0.5.

[0041] like Figure 2 , Figure 3 As shown, the miniature crushed stone pile in this embodiment is constructed using the aforementioned miniature crushed stone pile construction structure, specifically obtained by recycling the stainless steel cylinder 2. The miniature crushed stone pile includes a hollow bamboo tube 1 and a precast pile tip 4. The bottom of the hollow bamboo tube 1 is fixed to the top center of the precast pile tip 4. The hollow bamboo tube 1 is filled with reinforcing concrete 5, and drainage crushed stone 6 is filled above the top of the precast pile tip 4 and outside the outer wall of the hollow bamboo tube 1.

[0042] The construction process of the recyclable micro-crushed stone pile structure and the recycling process of the stainless steel cylinder 2 in this embodiment are as follows:

[0043] Site preparation: Level the construction site, clear underground pipelines, rocks and other obstacles, and lay out the pile positions according to the design. The pile position deviation should be controlled within ±50mm.

[0044] Pile assembly: The anti-corrosion hollow bamboo tube 1 is fixed to the center of the top of the precast pile tip 4 with concrete to ensure that the two are not loose. The stainless steel tube 2 is slowly inserted, so that the precast pile tip 4 is connected to the stainless steel tube 2 through threads, thus completing the assembly of the pile shell.

[0045] Pile driving operation: Using a small pile driver or manual hammering, the assembled pile shell is driven into the foundation to the predetermined depth according to the design verticality requirements (deviation ≤1.5%). During the pile driving process, the pile body should be prevented from tilting or deforming.

[0046] Layered grouting: Pour evenly mixed C25 fine aggregate concrete into the hollow bamboo tube 1, applying grout in layers 2-3 times to ensure the core area is densely filled. After grouting, cover the pile body for moisture retention and curing for no less than 10 days.

[0047] Filling with drainage gravel 6: Fill the annular cavity between the hollow bamboo tube 1 and the stainless steel tube 2 with graded drainage gravel 6 with a particle size of 15-40mm in layers. Each layer is 200-300mm thick. Compact the gravel manually or with a small tamping tool to ensure that the density of the drainage gravel 6 is ≥85% and form a continuous drainage channel.

[0048] Stainless steel cylinder 2 recycling: Operators use a simple wrench or sleeve to connect to the square interface at the upper end of the stainless steel cylinder 2, and manually rotate the stainless steel cylinder 2. Utilizing the helical rotation of the inner thread and the precast pile tip 4, the stainless steel cylinder 2 slowly separates upwards. Continue rotating until the stainless steel cylinder 2 is completely detached from the foundation, completing the recycling process. After recycling, the stainless steel cylinder 2 is cleaned, derusted, and inspected. If it is free from deformation and the threads are intact, it can be reused. For foundations with high moisture content, drainage gravel 6 can be added and filled while recycling the stainless steel cylinder 2.

[0049] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A recyclable micropile construction structure, characterized by, The device includes a hollow bamboo tube (1), a stainless steel tube (2), and a precast pile tip (4). The stainless steel tube (2) is fitted over the hollow bamboo tube (1). The bottom of the hollow bamboo tube (1) is fixed to the top center of the precast pile tip (4). The bottom of the inner cavity of the stainless steel tube (2) is provided with a connecting thread (3). The top side wall of the precast pile tip (4) is provided with a connecting thread (3). The stainless steel tube (2) and the precast pile tip (4) are threaded together. The hollow bamboo tube (1) is filled with reinforcing concrete (5). The annular cavity between the stainless steel tube (2) and the hollow bamboo tube (1) is filled with drainage gravel (6).

2. The recyclable micropile construction structure according to claim 1, wherein, The hollow bamboo tube (1) has an inner cavity that is hollow with all internal bamboo nodes removed.

3. The recyclable micro-gravel pile construction structure according to claim 1, characterized in that, The hollow bamboo tube (1) is fixed to the top center of the precast pile tip (4) by concrete.

4. The recyclable micro-gravel pile construction structure according to claim 1, characterized in that, The hollow bamboo tube (1) has a layer of anti-corrosion material on both its inner and outer surfaces.

5. The recyclable micro-gravel pile construction structure according to claim 1, characterized in that, The stainless steel cylinder (2) has a non-slip protrusion or square interface on the top of its outer wall that facilitates manual twisting, and the outer wall of the stainless steel cylinder (2) has a smooth structure.

6. The recyclable micro-gravel pile construction structure according to claim 1, characterized in that, The precast pile tip (4) is a conical component, and the top side wall of the precast pile tip (4) is recessed and provided with connecting threads (3).

7. A micro-crushed stone pile obtained by constructing a recyclable micro-crushed stone pile construction structure as described in any one of claims 1-6, characterized in that, It includes a hollow bamboo tube (1) and a precast pile tip (4). The bottom of the hollow bamboo tube (1) is fixed to the top center of the precast pile tip (4). The hollow bamboo tube (1) is filled with reinforcing concrete (5). The top of the precast pile tip (4) and the outer wall of the hollow bamboo tube (1) are filled with drainage gravel (6).

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