Sleeve type core concrete-ring sand prefabricated bamboo pile structure for reinforcing soft foundation

Abstract

The sleeve type core concrete-ring sand prefabricated bamboo pile structure comprises a first bamboo pile and a second bamboo pile, the second bamboo pile is arranged in the first bamboo pile in a sleeved mode, a plurality of bamboo body holes used for water drainage are formed in the surface of the first bamboo pile, concrete is filled in the second bamboo pile, and the first bamboo pile and the second bamboo pile are connected in a sleeved mode. An annular cavity is formed between the inner wall of the first bamboo pile and the outer wall of the second bamboo pile and filled with drainage sand. According to the sleeve type core concrete-ring sand prefabricated bamboo pile structure, the sleeve type first bamboo pile and the sleeve type second bamboo pile are adopted, a reinforcing structure and a water drainage structure are formed through grouting and sand injection respectively, the effects of water drainage and soft foundation reinforcing can be achieved, the double functions of water drainage and load bearing are achieved, and the service life of the structure is prolonged. The method can be widely applied to reinforcement treatment of soft foundations. The sleeve type core concrete-ring sand prefabricated bamboo pile structure further has the advantages of being low in cost, convenient to take materials, green and renewable in material and the like.

Description

Technical Field

[0001] The utility model belongs to the field of foundation, and in particular relates to a soft foundation reinforcement structure. Background Art

[0002] As a common adverse geological condition in engineering construction, soft foundation has the characteristics of low bearing capacity and poor stability. For soft foundation with low load bearing capacity, if it is not reinforced before construction, it is very easy to have problems such as excessive settlement and uneven settlement, which will bring great safety risks to the stability of buildings (structures) and the bearing capacity of foundations.

[0003] In the field of construction engineering, soft foundation treatment faces many challenges. Traditional soft foundation treatment technologies, such as using plastic drainage boards to treat soft foundations, have limited treatment effects and are difficult to meet the needs of special projects or extreme loads. They also have high construction technology requirements and poor adaptability. They have high costs and long construction periods. They have pollution and may damage the ecological environment.

[0004] As a natural material, bamboo has its own unique advantages. For example, bamboo is environmentally friendly. Bamboo raw materials are easy to obtain in many areas and are low in cost, which can reduce the cost of the project. Compared with traditional piles, bamboo is lighter, and it is convenient to transport and construct. It can reduce the frequency of using large machinery and equipment and reduce construction energy consumption. However, due to the structure and strength of bamboo, the direct use of bamboo for soft foundation reinforcement is difficult to meet the requirements. Therefore, a soft foundation reinforcement structure based on bamboo is proposed, which has broad application prospects. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies and defects mentioned in the above background technology and provide a sleeve-type core concrete-ring sand prefabricated bamboo pile structure for reinforcing soft foundations with good drainage and reinforcement effect.

[0006] In order to solve the above technical problems, the technical solution proposed by the utility model is:

[0007] A sleeve-type core concrete-ring sand prefabricated bamboo pile structure for reinforcing a weak foundation comprises a first bamboo pile and a second bamboo pile, wherein the second bamboo pile is sleeved in the first bamboo pile, a plurality of bamboo body holes for drainage are provided on the surface of the first bamboo pile, the interior of the second bamboo pile is filled with concrete, an annular cavity is provided between the inner wall of the first bamboo pile and the outer wall of the second bamboo pile, and the annular cavity is filled with drainage sand.

[0008] In the above-mentioned sleeve-type core concrete-ring sand prefabricated bamboo pile structure, preferably, the inner cavity of the first bamboo pile is a bottom-enclosed hollow structure with only the lowest internal bamboo node retained and other internal bamboo nodes removed, and the inner cavity of the second bamboo pile is a hollow structure with all internal bamboo nodes removed. The first bamboo pile retains the lowest internal bamboo node and then removes other bamboo nodes, so that the inner cavity of the first bamboo pile can be smooth, and the lowest internal bamboo node can play a supporting and sealing role. The second bamboo pile removes all internal bamboo nodes to ensure that the inner cavity has good flatness and cleanliness.

[0009] In the above-mentioned sleeve-type core concrete-ring sand prefabricated bamboo pile structure, preferably, the bottom of the second bamboo pile is arranged on the inner bamboo node at the bottom of the inner cavity of the first bamboo pile, and a sealing layer is arranged at the junction of the second bamboo pile and the inner bamboo node at the bottom of the inner cavity of the first bamboo pile. The sealing layer can realize the fixed sealing between the bottom of the second bamboo pile and the first bamboo pile, and prevent the concrete in the second bamboo pile from leaking into the first bamboo pile.

[0010] In the above sleeve-type core concrete-ring sand prefabricated bamboo pile structure, preferably, a positioning and fixing assembly for positioning and fixing the first bamboo pile and the second bamboo pile is further provided between the first bamboo pile and the second bamboo pile. The positioning and fixing assembly can realize the positioning of the first bamboo pile and the second bamboo pile, and prevent the second bamboo pile from shaking inside the first bamboo pile.

[0011] In the above-mentioned sleeve-type core concrete-ring sand prefabricated bamboo pile structure, preferably, the positioning and fixing assembly includes a plurality of orthogonal bamboo strip pairs arranged at different heights of the first bamboo pile and the second bamboo pile, and the first bamboo pile and the second bamboo pile are provided with orthogonal holes for the orthogonal bamboo strip pairs to pass through. The orthogonal bamboo strip pair includes two orthogonal bamboo strips, and the orthogonal holes are equivalent to four holes evenly opened on the first bamboo pile, with the angle between adjacent holes being 90 degrees, and the heights are staggered in pairs, and the second bamboo pile is also provided with four holes at the corresponding position, and the two bamboo strips are respectively inserted into the four holes to realize the orthogonal arrangement and realize the positioning and fixing of the first bamboo pile and the second bamboo pile.

[0012] In the above-mentioned sleeve-type core concrete-ring sand prefabricated bamboo pile structure, preferably, the inner and outer surfaces of the first bamboo pile and the second bamboo pile are both coated with an anti-corrosion material layer. Providing the anti-corrosion material layer is beneficial to improving the anti-corrosion performance of the bamboo material.

[0013] In the above sleeve-type core concrete-ring sand prefabricated bamboo pile structure, preferably, the outer surface of the first bamboo pile is wrapped with a non-woven geotextile by binding with a strap. The non-woven geotextile can filter and prevent fine sand from entering the weak foundation.

[0014] In the above sleeve-type core concrete-surrounded sand prefabricated bamboo pile structure, preferably, the bottom of the first bamboo pile is provided with a sharp corner. Providing a sharp corner at the bottom of the first bamboo pile is conducive to laying a soft foundation for the sleeve-type core concrete-surrounded sand prefabricated bamboo pile structure.

[0015] In the above sleeve-type core concrete-ring sand prefabricated bamboo pile structure, preferably, the diameter of the bamboo body holes is 8-10 mm, and 10-15 bamboo body holes are evenly opened on each section. The arrangement of the above bamboo body holes is conducive to infiltration and drainage, and improves the reinforcement effect of weak foundation.

[0016] The sleeve-type core concrete-ring sand prefabricated bamboo pile structure of the utility model utilizes the natural material of bamboo and combines the construction concept of prefabrication to obtain a soft foundation drainage reinforcement structure with good soft foundation drainage reinforcement effect. When prefabricating the structure, holes are first punched on the surface of the original bamboo, and then a circle of non-woven geotextile is wrapped around it. The small-diameter bamboo tube (i.e., the second bamboo pile, the small-diameter bamboo tube hereinafter refers to the second bamboo pile) is placed in the large-diameter bamboo tube (i.e., the first bamboo pile, the large-diameter bamboo tube hereinafter refers to the first bamboo pile), and the small-diameter bamboo tube is fixed by driving in an orthogonal bamboo strip pair and sealed with a professional wood sealant. Then, the small-diameter bamboo tube is grouting treated (i.e., filled with concrete), and the large-diameter bamboo tube is injected with pure fine sand (i.e., filled with drainage sand). After driving it into the soft foundation, the fine sand in the outer large-diameter bamboo tube can achieve drainage of the soft foundation by capillary action, and the cement mortar in the inner layer can enable the pile body to better transfer the load from the upper structure to the deep foundation, thereby improving the bearing capacity of the soft foundation. The sleeve core concrete-ring sand prefabricated bamboo pile structure is introduced below through a detailed prefabrication method and pile sinking method, and the method may include the following steps:

[0017] Select raw bamboo: Raw bamboo is bamboo that meets the diameter requirements, such as giant dragon bamboo. Raw bamboo is preferably bamboo that has grown for more than three years, and the surface should be free of serious cracks, insect bites, mildew, dryness and other defects. In projects with relatively low load requirements, the diameter of the large-diameter bamboo tube should be greater than 200mm, and the diameter of the small-diameter bamboo tube should be greater than 100mm. In engineering scenarios with larger loads, the diameter of the large-diameter bamboo tube should be greater than 250mm, and the diameter of the small-diameter bamboo tube should be greater than 150mm. The length of the bamboo can be 1.0-6.0m, and the wall thickness should be greater than 5mm.

[0018] Hollow out the bamboo nodes of the original bamboo (keep the inner bamboo nodes at the bottom of the large-diameter bamboo tube): select the original bamboo to be processed, remove the internal bamboo nodes (keep the inner bamboo nodes at the bottom of the large-diameter bamboo tube), and thoroughly clean the inner cavity of the original bamboo to ensure that the inner cavity has good flatness and cleanliness, laying the foundation for subsequent processes.

[0019] Raw bamboo drying: Drying operation is carried out on raw bamboo to accurately control its moisture content to reach the predetermined standard. This step plays a key role in the subsequent performance stability of bamboo in the project. After drying, it is cut and processed according to the design requirements so that its length and diameter meet the pile size requirements.

[0020] Punching holes in bamboo tubes with large diameters: holes are punched on the surface of the original bamboo to form holes in the bamboo body. In order to ensure drainage efficiency and minimize the impact on the strength of the bamboo, the hole diameter can be selected to be around 8-10mm. This size can ensure that fine sand can be injected smoothly without excessively weakening the strength of the bamboo pile. In terms of quantity, 10-15 holes can be punched around the side of each bamboo pile in each divided interval, so that there is enough distribution space for fine sand inside the bamboo pile, which is conducive to drainage through capillary action, so as to ensure that the fine sand can fully play its role in drainage in the weak foundation.

[0021] Anti-corrosion coating on the surface of bamboo tubes of different diameters: After completing the above steps, evenly apply and impregnate the anti-corrosion material on the inner and outer surfaces of the original bamboo. The anti-corrosion material can be any one of tung oil, raw lacquer, ACQ (alkaline copper quaternary ammonium salt), CCA (copper chromium arsenic mixture), asphalt, and coal tar, and it needs to be applied 2 to 3 times. Make sure that the inner and outer surfaces of the original bamboo are fully covered and impregnated, thereby improving the anti-corrosion performance of the original bamboo.

[0022] Install the internal small-diameter bamboo tube: make a pair of orthogonal holes on the bamboo bodies of the large and small bamboo tubes, and then press in orthogonal bamboo strips to fix the small-diameter bamboo tube in the center of the large-diameter bamboo tube, and use professional wood sealant to seal the orthogonal holes and the contact surfaces at the lower ends of the large and small bamboo tubes to prevent leakage of fine sand and concrete. The professional wood sealant can be any one of nail-free glue, white latex, epoxy resin AB glue, silicone sealant, and polyurethane sealant.

[0023] Binding of non-woven geotextile: Select appropriate non-woven geotextile and wrap it tightly around the outer periphery of the large-diameter bamboo tube with a binding tape. The binding tape can be any one of bamboo rattan, bamboo bundle, bamboo fiber sheet, metal strip, and fiber strip. When wrapping, ensure that the non-woven geotextile is flat and wrinkle-free, and is firmly tied to the original bamboo. The role of the non-woven geotextile is to filter and block fine sand from entering the soft soil during the subsequent drainage process.

[0024] Grouting and sand injection: prepare concrete and pure fine sand. During the grouting process, closely observe the changes in grouting pressure and flow rate to ensure the uniformity and density of grouting. When the grouting volume reaches the design requirements or the grouting pressure stabilizes at a certain value for a period of time, close the grouting valve, clean and maintain the grouting equipment, and prepare for the next grouting. When injecting sand, inject fine sand at the upper end. During the injection process, you can use a slender tool (such as bamboo sticks) to gently tamp the fine sand to make the fine sand fill more tightly and form a better capillary structure inside the bamboo tube. The above concrete can use recycled aggregate concrete to reduce the consumption of natural resources and reduce costs. During the grouting process, the density of the recycled aggregate concrete must be ensured to avoid quality problems such as honeycombs and rough surfaces.

[0025] Driving the original bamboo: Driving the original bamboo into the soft foundation, and placing a soft cushion on the upper end of the original bamboo to prevent the upper end of the original bamboo from being crushed during the static pressure method. Specifically, select appropriate static pressure equipment to accurately drive the processed original bamboo into the soft foundation according to the pre-designed pile position. Arrange a soft cushion on the upper end of the bamboo pile to avoid damage to the upper end during the driving process. At the same time, strictly control the driving force and speed to ensure that the original bamboo sinks vertically to prevent tilting or offset. Closely observe the driving of the original bamboo. Once abnormal resistance or other problems are encountered, stop construction immediately, analyze the causes and take effective solutions. Check the original bamboo after driving to confirm that its depth and position meet the design requirements. If there is a deviation, make adjustments in time. Professional measuring tools can be used to measure the elevation of the top of the original bamboo to ensure that the height of each pile is consistent, laying a good foundation for subsequent grouting construction.

[0026] Among the above steps, the last step is on-site construction, and the previous steps can all be prefabricated in batches in the factory.

[0027] The sleeve-type core concrete-ring sand prefabricated bamboo pile structure of the utility model utilizes bamboo to reinforce soft foundations. Bamboo has unique advantages in reinforcing soft foundations. Bamboo raw materials are easy to obtain in many areas and are low in cost, which can reduce the cost of the project. Compared with traditional piles, bamboo is lighter in weight, convenient in transportation and construction operation, can reduce the frequency of use of large-scale machinery and equipment, and reduce construction energy consumption. The use of bamboo effectively saves steel, a non-renewable resource. Steel is often accompanied by high energy consumption and high pollution during the production process. As a renewable resource, bamboo is put into use to a certain extent to alleviate the pressure on the environment, save resources, protect the environment, and reduce pollution during the entire life cycle of the building. At the same time, by carrying out a special structural design on bamboo, adopting a sleeve-type structure, and grouting the second bamboo pile through a grouting process, the internal structure of the bamboo is strengthened, and the strength is significantly improved, which makes up for the lack of its initial strength to a certain extent, can enhance the stability of the foundation, and enable it to play a better role in the reinforcement project of soft foundations. The capillary action formed by injecting sand into the annular cavity between the first bamboo pile and the second bamboo pile can form a drainage body, accelerating the drainage consolidation process of the soft foundation. Through the above grouting and sand injection, the bamboo material can achieve high-quality drainage and reinforcement of the soft foundation.

[0028] Compared with the prior art, the advantages of the utility model are:

[0029] 1. The sleeve-type core concrete-ring sand prefabricated bamboo pile structure of the utility model adopts a sleeve-type first bamboo pile and a second bamboo pile, and adopts grouting and sand injection to form a reinforcement structure and a drainage structure respectively, which can achieve the effect of drainage and reinforcement of soft foundations, has the dual functions of drainage and load bearing, and can be widely used in the reinforcement treatment of soft foundations.

[0030] 2. The sleeve-type core concrete-surrounding sand prefabricated bamboo pile structure of the utility model makes full use of renewable and quickly mature raw bamboo, and has the advantages of low cost, convenient material acquisition, and green and renewable materials. At the same time, the construction method of the sleeve-type core concrete-surrounding sand prefabricated bamboo pile structure is simple and fast, and the transportation and construction cost is low, and it has good application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 Schematic diagram of the structure of a sleeve-type core concrete-ring sand prefabricated bamboo pile structure for reinforcing a soft foundation in an embodiment (non-woven geotextile and binding tape are not shown).

[0033] Figure 2 The schematic diagram of the structure of the non-woven geotextile and the binding tape in the sleeve core concrete-ring sand prefabricated bamboo pile structure for reinforcing the soft foundation of the embodiment.

[0034] Figure 3 Schematic diagram of the cross-sectional structure of a sleeve-core concrete-ring sand prefabricated bamboo pile structure for reinforcing a soft foundation in an embodiment (non-woven geotextile and binding tape are not shown).

[0035] Figure 4 A top view of a sleeve-core concrete-ring sand prefabricated bamboo pile structure for reinforcing a weak foundation according to an embodiment of the present invention (non-woven geotextile and binding tapes are not shown).

[0036] Legend

[0037] 1. The first bamboo stake; 2. The second bamboo stake; 3. Holes in the bamboo body; 5. Binding tape; 6. Drainage sand; 7. Concrete; 8. Non-woven geotextile; 9. Pair of orthogonal bamboo strips; 10. Sealant layer. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and carefully below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.

[0039] It should be noted that when an element is described as being "fixed, fixed, connected or connected to" another element, it can be directly fixed, fixed, connected or connected to the other element, or it can be indirectly fixed, fixed, connected or connected to the other element through other intermediate connectors.

[0040] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present utility model.

[0041] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0042] Example:

[0043] like Figure 1-Figure 4 As shown, the sleeve-type core concrete-ring sand prefabricated bamboo pile structure for reinforcing soft foundation of this embodiment comprises a first bamboo pile 1 and a second bamboo pile 2, wherein the second bamboo pile 2 is sleeved in the first bamboo pile 1, a plurality of bamboo body holes 3 for drainage are opened on the surface of the first bamboo pile 1, the interior of the second bamboo pile 2 is filled with concrete 7, an annular cavity is provided between the inner wall of the first bamboo pile 1 and the outer wall of the second bamboo pile 2, and the annular cavity is filled with drainage sand 6. The concrete 7 is preferably made of renewable aggregate concrete, and the drainage sand 6 is preferably made of pure fine sand.

[0044] like Figure 3 As shown, in this embodiment, the inner cavity of the first bamboo stake 1 is a hollow structure with the bottom closed by only retaining the lowest internal bamboo node and removing other internal bamboo nodes, and the inner cavity of the second bamboo stake 2 is a hollow structure with all internal bamboo nodes removed.

[0045] like Figure 3 As shown, in this embodiment, the bottom of the second bamboo stake 2 is arranged on the inner bamboo node at the bottom of the inner cavity of the first bamboo stake 1, and a sealant layer 10 is arranged at the junction of the second bamboo stake 2 and the inner bamboo node at the bottom of the inner cavity of the first bamboo stake 1. The sealant layer 10 can be made of professional wood sealant, such as nail-free glue.

[0046] like Figure 3 As shown, in this embodiment, a positioning and fixing assembly for positioning and fixing the first bamboo stake 1 and the second bamboo stake 2 is further provided between the first bamboo stake 1 and the second bamboo stake 2. Specifically, the positioning and fixing assembly includes a plurality of orthogonal bamboo strip pairs 9 provided at different heights of the first bamboo stake 1 and the second bamboo stake 2, and orthogonal holes are provided on the first bamboo stake 1 and the second bamboo stake 2 for the orthogonal bamboo strip pairs 9 to pass through. The number of orthogonal bamboo strip pairs 9 can be selected according to needs, such as Figure 3 Two pairs are shown in the figure, and in other embodiments, more orthogonal bamboo strips 9 can be selected according to the situation. After the orthogonal holes are installed with the orthogonal bamboo strips 9, the gaps also need to be sealed with professional wood sealant.

[0047] In this embodiment, the inner and outer surfaces of the first bamboo pile 1 and the second bamboo pile 2 are coated with an antiseptic material layer. The antiseptic material of the antiseptic material layer is not limited, such as tung oil.

[0048] like Figure 2 As shown, in this embodiment, the outer surface of the first bamboo pile 1 is wrapped and covered with a non-woven geotextile 8 by means of a binding belt 5 .

[0049] like Figure 1 As shown, in this embodiment, the bottom of the first bamboo stake 1 is provided with a sharp corner.

[0050] In this embodiment, the diameter of the bamboo body holes 3 is 8-10 mm, and each section is evenly provided with 10-15 bamboo body holes 3. The diameter and number of the bamboo body holes 3 can be selected according to actual conditions.

[0051] The sleeve-type core concrete-ring sand prefabricated bamboo pile structure for reinforcing soft foundations of this embodiment includes the steps of hollowing out the original bamboo joints (retaining the lowermost bamboo joints of the large-diameter bamboo tube), drying the original bamboo, drilling holes in the bamboo tube body of the large-diameter bamboo tube, brushing the surface of the large-diameter bamboo tube with anti-corrosion materials, installing the internal bamboo tube, tying the non-woven geotextile 8, grouting and sand injection, etc. After prefabrication, it can be transported to the construction site and driven into the soft foundation. After being driven into the soft foundation, the fine sand uses capillary action to drain water, and the cement mortar transfers the upper load to the deep of the foundation, thereby realizing drainage reinforcement of the soft foundation. This embodiment makes full use of the renewable and rapidly mature raw bamboo, and has the advantages of convenient material collection and green and renewable materials. At the same time, the construction method of this embodiment is simple, fast and low-cost. The prefabricated bamboo pile structure has the dual functions of drainage and load bearing, and can be widely used in drainage reinforcement of soft foundations.

[0052] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A sleeve-type core concrete-ring sand prefabricated bamboo pile structure for reinforcing soft foundations, characterized in that: The invention comprises a first bamboo pile (1) and a second bamboo pile (2), wherein the second bamboo pile (2) is sleeved in the first bamboo pile (1), a plurality of bamboo body holes (3) for drainage are provided on the surface of the first bamboo pile (1), the interior of the second bamboo pile (2) is filled with concrete (7), an annular cavity is provided between the inner wall of the first bamboo pile (1) and the outer wall of the second bamboo pile (2), and the annular cavity is filled with drainage sand (6).

2. The sleeve core concrete-ring sand prefabricated bamboo pile structure according to claim 1 is characterized in that: The inner cavity of the first bamboo pile (1) is a bottom-enclosed hollow structure in which only the lowest internal bamboo node is retained and other internal bamboo nodes are removed, and the inner cavity of the second bamboo pile (2) is a hollow structure in which all internal bamboo nodes are removed.

3. The sleeve core concrete-ring sand prefabricated bamboo pile structure according to claim 2 is characterized in that: The bottom of the second bamboo pile (2) is arranged on the inner bamboo node at the bottom of the inner cavity of the first bamboo pile (1), and a sealing glue layer (10) is provided at the junction of the inner bamboo node at the bottom of the inner cavity of the second bamboo pile (2) and the first bamboo pile (1).

4. The sleeve core concrete-ring sand prefabricated bamboo pile structure according to claim 2 is characterized in that: A positioning and fixing component for positioning and fixing the first bamboo pile (1) and the second bamboo pile (2) is also provided between the first bamboo pile (1) and the second bamboo pile (2).

5. The sleeve core concrete-ring sand prefabricated bamboo pile structure according to claim 4 is characterized in that: The positioning and fixing assembly comprises a plurality of orthogonal bamboo strip pairs (9) arranged at different heights of the first bamboo pile (1) and the second bamboo pile (2), and the first bamboo pile (1) and the second bamboo pile (2) are provided with orthogonal holes for the orthogonal bamboo strip pairs (9) to pass through.

6. The sleeve core concrete-ring sand prefabricated bamboo pile structure according to any one of claims 1 to 5, characterized in that: The inner and outer surfaces of the first bamboo pile (1) and the second bamboo pile (2) are both coated with an anti-corrosion material layer.

7. The sleeve core concrete-ring sand prefabricated bamboo pile structure according to any one of claims 1 to 5, characterized in that: The outer surface of the first bamboo pile (1) is covered with a non-woven geotextile (8) by binding with a binding belt (5).

8. The sleeve core concrete-ring sand prefabricated bamboo pile structure according to any one of claims 1 to 5, characterized in that: The bottom of the first bamboo stake (1) is provided with a sharp corner.

9. The sleeve core concrete-ring sand prefabricated bamboo pile structure according to any one of claims 1 to 5, characterized in that: The diameter of the bamboo body holes (3) is 8-10 mm, and 10-15 bamboo body holes (3) are evenly arranged on each node.

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