Prefabricated concrete core-sand filling drainage bamboo pile for soft foundation reinforcement
By introducing precast concrete cores and drainage sand into the bamboo pile body and opening drainage holes on the outside, the problem of poor bearing capacity and drainage effect of bamboo in weak foundation reinforcement is solved, and efficient reinforcement and drainage effect is achieved.
Patent Information
- Application Number
- CN202520540133.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2035-03-26
AI Technical Summary
The prior art is difficult to meet the load-bearing capacity and drainage effects of weak foundation reinforcement by directly using bamboo.
Precast concrete core-filled sand drainage bamboo piles are used. By opening drainage holes on the outside of the bamboo pile, a precast concrete core is placed in the inner cavity of the bamboo pile, and drainage sand is filled between the precast concrete core and the bamboo pile to improve the bearing capacity and drainage effect of the pile body.
While making full use of the mechanical and environmental protection properties of bamboo, it can improve the bearing capacity of the pile body and accelerate the drainage and consolidation of the foundation, effectively solving the key problems of weak foundation reinforcement.
Smart Images
Figure CN222834879U_ABST
Abstract
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] Composite foundations are often used for soft foundation treatment and reinforcement, and pile composite foundations are widely used. Bamboo is a renewable material with excellent mechanical and environmental performance. It has high bending and compressive strength, good elasticity and toughness, low cost, and a wide range of material sources. After anti-corrosion treatment, it can be used as bamboo piles. It has been used in building foundation reinforcement and foundation design for a long time. However, due to the structure and strength of bamboo, it is difficult to meet the requirements of bearing capacity and drainage effect when bamboo is directly used for soft foundation reinforcement. How to give full play to the mechanical and environmental performance advantages of bamboo piles, improve the bearing capacity of piles and accelerate foundation drainage and consolidation to achieve soft soil foundation reinforcement has become a key issue restricting the application of bamboo in foundation treatment. Utility Model Content
[0003] 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 prefabricated concrete core-filled sand drainage bamboo pile for reinforcing soft foundations with high pile bearing capacity and good drainage effect.
[0004] In order to solve the above technical problems, the technical solution proposed by the utility model is:
[0005] A precast concrete core-sand-filled drainage bamboo pile for reinforcing a soft foundation comprises a bamboo pile, a plurality of drainage holes for drainage are provided on the surface of the bamboo pile, a precast concrete core is provided at the center of the bamboo pile, an annular cavity is provided between the inner wall of the bamboo pile and the outer wall of the precast concrete core, the annular cavity is filled with drainage sand, and a precast concrete pile tip is provided at the lower end of the bamboo pile for facilitating the bamboo pile to be driven into the soft foundation.
[0006] In the above-mentioned precast concrete core-filled sand drainage bamboo pile, preferably, the inner cavity of the bamboo pile is a hollow structure with all internal bamboo nodes removed, the precast concrete pile tip includes an inverted cone and a concrete column arranged above the inverted cone, and the lower end of the bamboo pile is sealed and clamped on the concrete column. The bamboo pile removes all internal bamboo nodes to ensure that the inner cavity has good flatness and cleanliness. The inverted cone can facilitate the bamboo pile to be driven into a weak foundation. The outer diameter of the concrete column needs to match the inner diameter of the bamboo pile for better connection, and the outer diameter of the concrete column can be slightly smaller than the inner diameter of the bamboo pile, and the two are bonded into a whole by waterproof glue.
[0007] In the above-mentioned prefabricated concrete core-sand-filled drainage bamboo pile, preferably, the outer diameter of the concrete column is smaller than the upper outer diameter of the inverted cone portion, and the upper outer diameter of the inverted cone portion is larger than the outer diameter of the bamboo pile. When the upper outer diameter of the inverted cone portion is larger than the outer diameter of the bamboo pile, when the inverted cone portion is driven downward, a hole slightly larger than the outer diameter of the bamboo pile can be provided, which can facilitate better driving of the bamboo pile into a weak foundation.
[0008] In the above-mentioned prefabricated concrete core-filled sand drainage bamboo pile, preferably, the outer surface of the bamboo pile is covered with a non-woven geotextile layer, and the upper edge of the inverted cone portion is provided with a clamping ring for clamping on the surface of the non-woven geotextile layer, and the clamping ring is glued to the outer surface of the non-woven geotextile layer. The non-woven geotextile can filter and block fine sand from entering the weak foundation, but when the bamboo pile is driven into the weak foundation, the non-woven geotextile may be affected by the foundation resistance and detach from the surface of the bamboo pile or become uneven, or wrinkled, affecting its effect. The utility model adds a clamping ring on the upper edge of the inverted cone portion, fixes the lower end of the non-woven geotextile through the clamping ring, and fixes the non-woven geotextile when the bamboo pile is driven downward into the weak foundation, so as to avoid upward detachment due to force. The above-mentioned clamping ring can be made of concrete material and prefabricated with the inverted cone portion. If the inner diameter of the clamping ring is too large, a bamboo gasket can be added between the clamping ring and the non-woven geotextile, and bonded by glue.
[0009] In the above-mentioned prefabricated concrete core-filled sand drainage bamboo pile, preferably, the non-woven geotextile layer is arranged on the outer surface of the bamboo pile by binding with a band. By binding with a band, the non-woven geotextile can be prevented from moving, ensuring that the non-woven geotextile is flat and wrinkle-free, and is firmly bound to the bamboo pile to ensure its effect.
[0010] In the above-mentioned precast concrete core-filled sand drainage bamboo pile, preferably, a positioning protrusion is provided at the center of the concrete column, and a positioning groove for matching with the positioning protrusion is provided at the bottom of the precast concrete core. Through the cooperation of the positioning protrusion and the positioning groove, the lower positioning of the precast concrete core can be achieved, so that the precast concrete core is located at the center of the bamboo pile to leave an annular cavity for filling drainage sand. The above-mentioned positioning protrusion can be obtained by prefabrication of the concrete column, and the positioning groove can be slightly larger than the positioning protrusion to facilitate subsequent assembly.
[0011] In the above-mentioned precast concrete core-sand-filled drainage bamboo pile, preferably, the upper end of the precast concrete core is provided with a positioning through hole, the top of the bamboo pile is provided with a positioning clamping hole, the upper end of the precast concrete core is fixed in the bamboo pile by a positioning rod, the middle part of the positioning rod is inserted in the positioning through hole, and the two ends of the positioning rod are clamped in the positioning clamping hole. The middle part of the positioning rod is inserted in the positioning through hole in the precast concrete core, and the two ends are clamped in the positioning clamping hole. Through the positioning through hole, the positioning clamping hole and the positioning rod, the upper positioning of the precast concrete core can be facilitated, and the precast concrete core can be prevented from moving upward and sliding out. The positioning protrusion and positioning groove below can be cooperated to better realize that the precast concrete core is located in the center of the bamboo pile. The above-mentioned positioning rod can be made of bamboo or steel.
[0012] In the above-mentioned prefabricated concrete core-filled sand drainage bamboo pile, preferably, the inner and outer surfaces of the bamboo pile are 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] The utility model discloses a bamboo pile with precast concrete core and sand filling for drainage used for reinforcing soft foundations. It is a bamboo pile that can take into account both drainage and vertical bearing capacity. Drainage holes are opened on the outside of the bamboo pile, and the precast concrete core is placed in the inner cavity of the bamboo pile. Drainage sand is filled between the precast concrete core and the bamboo pile. After the bamboo pile is driven into the soft foundation, water in the foundation enters the bamboo pile through the drainage holes, and then the water is discharged from the top of the bamboo pile through the capillary effect of the sand particles. At the same time, placing a precast concrete core inside the pile can effectively improve the bearing capacity of the pile. Bamboo material, as the outer shell of the pile body, provides lateral constraints and can prevent sand loss. The non-woven geotextile on the outer coat of the bamboo pile can avoid the problem of reduced drainage capacity caused by clogging of small holes in the pile body. The utility model has the advantages of convenient material acquisition, environmentally friendly and renewable materials, low cost, simple construction, etc., and has significant economic and environmental benefits.
[0014] The prefabricated concrete core-filled sand drainage bamboo pile for reinforcing soft foundation of the utility model can be realized by the following steps: selecting bamboo, hollowing out bamboo joints, drying bamboo, brushing anti-corrosion materials, drilling holes on the outside of bamboo and covering it with non-woven geotextile, installing prefabricated concrete pile tips, installing prefabricated concrete cores, and filling drainage sand in bamboo. The specific steps can be as follows:
[0015] Select bamboo: Choose bamboo that is tough, strong and mature. Perform primary processing on the bamboo and take a 3m long bamboo.
[0016] Hollow out bamboo nodes: open up the bamboo nodes inside the bamboo, then use a high-pressure water gun to clean the impurities, ash and bamboo node membrane inside the bamboo, and ensure the flatness and cleanliness of the inner cavity.
[0017] Drying bamboo: Drying bamboo, using hot air drying method to process, and controlling its predetermined moisture content.
[0018] Apply anti-corrosion material: Apply and impregnate anti-corrosion material on the inner and outer surfaces of the bamboo. The anti-corrosion material can be one of waste engine oil, coal tar, asphalt, and resin glue. Apply 2-3 times to ensure that the inner and outer surfaces of the bamboo are fully covered and impregnated.
[0019] Punch holes on the outside of the bamboo and cover it with non-woven geotextile: Use a small drill to punch holes in the middle of the upper and lower bamboo nodes, make holes in a rice shape around the bamboo, and then cover it with non-woven geotextile. You can first roll the geotextile into a tube with an inner diameter slightly larger than the outer diameter of the bamboo pile. Then, insert the rolled geotextile tube from the top of the pile and slowly pull it down to evenly wrap the geotextile around the opening, and then tie it with straps.
[0020] Install precast concrete pile tip: Precast concrete pile tip, seal the bottom of the bamboo pile on the precast concrete pile tip with epoxy resin adhesive to connect them into a whole.
[0021] Install the precast concrete core: Fix the precast concrete core to the hook of the crane with a steel wire rope, and operate the crane to align the precast concrete core vertically with the upper mouth of the bamboo. Use an auxiliary laser vertical meter to determine whether it is vertical. The laser vertical meter is installed on the top of the concrete core and emits a vertical downward laser beam. The position of the precast concrete core is adjusted by observing whether the laser beam coincides with the central axis of the bamboo, and then slowly lowered to place the precast concrete core into the bamboo pile. Through the cooperation of the positioning protrusion and the positioning groove, and through the cooperation of the positioning through hole, the positioning card hole and the positioning rod, the positioning connection of the precast concrete core and the bamboo pile can be achieved.
[0022] Fill the bamboo with drainage sand: Use a funnel to fill the sand from the top. When the sand completely covers the top of the pile, you can use a wooden hammer to hit the outer wall of the bamboo to make the sand dense. Repeat the filling and hitting operations until the sand completely fills the gap between the bamboo and the precast concrete core.
[0023] The utility model discloses a prefabricated concrete core-sand-filled drainage bamboo pile for reinforcing a soft foundation. The bamboo material is used to reinforce the soft foundation. The bamboo material has unique advantages in reinforcing the soft foundation. The raw materials of the bamboo material are easy to obtain in many areas and the cost is low, which can reduce the project cost. The weight of the bamboo material is lighter than that of the traditional pile body, and the transportation and construction operations are convenient. The use frequency of large-scale mechanical equipment can be reduced, and the energy consumption of construction can be reduced. The use of bamboo material effectively saves steel, a non-renewable resource. The production process of steel is often accompanied by high energy consumption and high pollution. As a renewable resource, the use of bamboo material can alleviate the pressure on the environment to a certain extent, 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 the bamboo material, a bamboo pile that takes into account both drainage and vertical bearing capacity can be obtained. Specifically, drainage holes are opened on the outside of the bamboo pile, a precast concrete core is placed in the inner cavity of the bamboo pile, and drainage sand is filled between the precast concrete core and the bamboo pile. After the bamboo pile is driven into the soft foundation, water in the foundation enters the bamboo pile through the drainage holes, and then the water is discharged from the top of the bamboo pile through the capillary effect of the sand particles. At the same time, placing a precast concrete core inside the pile can effectively improve the pile's bearing capacity.
[0024] Compared with the prior art, the advantages of the utility model are:
[0025] 1. The utility model of the precast concrete core-sand-filled drainage bamboo pile for reinforcing soft foundation has drainage holes on the outside of the bamboo pile, the precast concrete core is placed in the inner cavity of the bamboo pile, and the drainage sand is filled between the precast concrete core and the bamboo pile, which can achieve the effect of drainage and reinforcement of soft foundation, and has the dual functions of drainage and load bearing, and can be widely used in the reinforcement of soft foundation. At the same time, a precast concrete pile tip is arranged under the bamboo pile, which can facilitate the bamboo pile to be driven into the soft foundation.
[0026] 2. The prefabricated concrete core-sand-filled drainage bamboo piles for reinforcing soft foundations of the utility model make full use of renewable and rapidly mature raw bamboo, and have the advantages of low cost, convenient material acquisition, and green and renewable materials. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] 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.
[0028] Figure 1 It is a schematic structural diagram of a prefabricated concrete core-sand-filled drainage bamboo pile for reinforcing a soft foundation according to an embodiment.
[0029] Figure 2 for Figure 1 Top view of the .
[0030] Figure 3 Schematic diagram of the structure of the precast concrete pile tip in the embodiment.
[0031] Figure 4 Schematic diagram of the structure of the precast concrete core in the embodiment (showing the positioning rods).
[0032] Legend
[0033] 1. Bamboo pile; 11. Positioning card hole; 2. Drainage hole; 4. Non-woven geotextile layer; 5. Precast concrete core; 51. Positioning groove; 52. Positioning through hole; 6. Drainage sand; 7. Precast concrete pile tip; 71. Inverted cone; 72. Concrete column; 721. Positioning protrusion; 73. Clamp ring; 8. Binding strap; 9. Positioning rod. DETAILED DESCRIPTION
[0034] 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.
[0035] 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.
[0036] 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.
[0037] 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.
[0038] Example:
[0039] like Figure 1-Figure 4 As shown, the precast concrete core-sand-filled drainage bamboo pile for reinforcing soft foundation of this embodiment comprises a bamboo pile 1, a plurality of drainage holes 2 for drainage are opened on the surface of the bamboo pile 1, a precast concrete core 5 is arranged at the center of the bamboo pile 1, an annular cavity is arranged between the inner wall of the bamboo pile 1 and the outer wall of the precast concrete core 5, the annular cavity is filled with drainage sand 6, and a precast concrete pile tip 7 is arranged at the lower end of the bamboo pile 1 for facilitating the bamboo pile 1 to be driven into the soft foundation.
[0040] In this embodiment, the inner cavity of the bamboo pile 1 is a hollow structure in which all internal bamboo nodes are removed. The precast concrete pile tip 7 includes an inverted cone portion 71 and a concrete column 72 arranged above the inverted cone portion 71. The lower end of the bamboo pile 1 is sealed and clamped on the concrete column 72 by epoxy resin adhesive.
[0041] In this embodiment, the outer diameter of the concrete column 72 is smaller than the upper outer diameter of the inverted cone portion 71 , and the upper outer diameter of the inverted cone portion 71 is larger than the outer diameter of the bamboo pile 1 .
[0042] In this embodiment, the outer surface of the bamboo pile 1 is covered with a non-woven geotextile layer 4, which is tied to the outer surface of the bamboo pile 1 by a binding belt 8. A clamping ring 73 for clamping on the surface of the non-woven geotextile layer 4 is prefabricated on the upper edge of the inverted cone portion 71, and the clamping ring 73 is bonded to the outer surface of the non-woven geotextile layer 4 by epoxy resin adhesive.
[0043] In this embodiment, a positioning protrusion 721 is provided at the center of the concrete column 72 , and a positioning groove 51 for matching with the positioning protrusion 721 is provided at the bottom of the precast concrete core 5 .
[0044] In this embodiment, a positioning through hole 52 is provided at the upper end of the precast concrete core 5, and a positioning clamping hole 11 is provided at the top of the bamboo pile 1. The upper end of the precast concrete core 5 is fixed in the bamboo pile 1 through a positioning rod 9, the middle part of the positioning rod 9 is inserted in the positioning through hole 52, and the two ends of the positioning rod 9 are clamped in the positioning clamping hole 11.
[0045] In this embodiment, the inner and outer surfaces of the bamboo pile 1 are coated with an anti-corrosion material layer. The anti-corrosion material can be one of waste oil, coal tar, asphalt, paint, and resin glue.
[0046] In this embodiment, the length of the bamboo pile 1 can be 3-6m, and the diameter of the bamboo pile 1 can be 12cm. The diameter of the drainage hole 2 can be 3cm, and can be arranged in a cross shape. The precast concrete core 5 and the precast concrete pile tip 7 can both be precast with recycled concrete. The drainage sand 6 can be medium-coarse sand.
[0047] The precast concrete core-sand-filled drainage bamboo pile for reinforcing soft foundation of this embodiment is a bamboo pile 1 that can take into account both drainage and vertical bearing capacity. Drainage holes 2 are opened on the outside of the bamboo pile 1, and the precast concrete core 5 is placed in the inner cavity of the bamboo pile 1, and drainage sand 6 is filled between the precast concrete core 5 and the bamboo pile 1. After the bamboo pile 1 is driven into the soft foundation, the water in the foundation enters the bamboo pile 1 through the drainage holes 2, and then the water is discharged from the top of the bamboo pile 1 through the capillary effect of the drainage sand 6 particles. At the same time, placing the precast concrete core 5 inside the pile can effectively improve the pile bearing capacity. This embodiment has the advantages of convenient material acquisition, environmentally friendly and recyclable materials, low cost, simple construction, etc., has significant economic and environmental benefits, and can be widely used in drainage reinforcement of soft foundations.
[0048] 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 prefabricated concrete core-sand-filled drainage bamboo pile for soft foundation reinforcement, characterized in that: The bamboo pile (1) comprises a bamboo pile (1), wherein a plurality of drainage holes (2) for drainage are provided on the surface of the bamboo pile (1), a precast concrete core (5) is provided at the center of the bamboo pile (1), an annular cavity is provided between the inner wall of the bamboo pile (1) and the outer wall of the precast concrete core (5), the annular cavity is filled with drainage sand (6), and a precast concrete pile tip (7) is provided at the lower end of the bamboo pile (1) for facilitating the bamboo pile (1) to be driven into a soft foundation.
2. The precast concrete core-sand filled drainage bamboo pile according to claim 1, characterized in that: The inner cavity of the bamboo pile (1) is a hollow structure with all internal bamboo nodes removed; the prefabricated concrete pile tip (7) comprises an inverted cone portion (71) and a concrete column (72) arranged above the inverted cone portion (71); the lower end of the bamboo pile (1) is sealed and clamped on the concrete column (72).
3. The precast concrete core-sand filled drainage bamboo pile according to claim 2, characterized in that: The outer diameter of the concrete column (72) is smaller than the upper outer diameter of the inverted cone portion (71), and the upper outer diameter of the inverted cone portion (71) is larger than the outer diameter of the bamboo pile (1).
4. The precast concrete core-sand filled drainage bamboo pile according to claim 3, characterized in that: The outer surface of the bamboo pile (1) is covered with a non-woven geotextile layer (4), and the upper edge of the inverted cone portion (71) is provided with a clamping ring (73) for clamping on the surface of the non-woven geotextile layer (4), and the clamping ring (73) is glued to the outer surface of the non-woven geotextile layer (4).
5. The precast concrete core-sand filled drainage bamboo pile according to claim 4, characterized in that: The non-woven geotextile layer (4) is tied to the outer surface of the bamboo pile (1) by means of a binding belt (8).
6. The precast concrete core-sand filled drainage bamboo pile according to claim 2, characterized in that: A positioning protrusion (721) is provided at the center of the concrete column (72), and a positioning groove (51) for matching with the positioning protrusion (721) is provided at the bottom of the precast concrete core (5).
7. The precast concrete core-sand filled drainage bamboo pile according to claim 6, characterized in that: The upper end of the precast concrete core (5) is provided with a positioning through hole (52), and the top of the bamboo pile (1) is provided with a positioning clamping hole (11). The upper end of the precast concrete core (5) is fixed to the bamboo pile (1) via a positioning rod (9), the middle portion of the positioning rod (9) is inserted into the positioning through hole (52), and both ends of the positioning rod (9) are clamped in the positioning clamping hole (11).
8. The precast concrete core-sand filled drainage bamboo pile according to any one of claims 1 to 7, characterized in that: The inner and outer surfaces of the bamboo pile (1) are coated with an anti-corrosion material layer.