Bamboo-based concrete structure for reinforcing soft foundation
By setting through holes on bamboo piles and inserting bamboo poles, and adding a concrete cushion layer, the rigid sudden change problem when connecting bamboo piles and concrete is solved, the effective connection and common bearing of bamboo piles and concrete is achieved, and the bearing capacity and stability of the foundation are improved.
Patent Information
- Application Number
- CN202520538961.1
- 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
There is a rigid sudden change problem when connecting bamboo piles to concrete, which restricts the large-scale application of bamboo piles in foundation reinforcement.
The combination of bamboo piles and bamboo poles is used, and the bamboo poles are interspersed in the through holes at the upper end of the bamboo piles, and the concrete cushion is poured on the bamboo piles and bamboo poles to form an integral structure to achieve the effective connection and common bearing between the bamboo piles and concrete.
Through this structural design, the rigid sudden change problem when bamboo piles are connected to concrete is reduced, the bearing capacity and stability of the foundation are improved, and the anti-slip and uneven settlement capabilities of the structure are enhanced.
Smart Images
Figure CN222834882U_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] In civil engineering construction, soft foundations are often encountered. The characteristics of soft foundations are high water content, low bearing capacity, high compressibility, etc. Foundations and buildings cannot be built on them without artificial reinforcement. The treatment methods for soft foundations mainly include drainage consolidation method, compaction method, replacement and mixing method, grouting method, reinforcement method, hot and cold treatment method, etc. Among them, the treatment method of forming a composite foundation by setting piles in soft soil is the most widely used. Bamboo is a renewable material with excellent mechanical properties and environmental protection properties. It has high bending and compressive strength, good elasticity and toughness, low cost, and a wide range of material sources. It can be used as bamboo piles after anti-corrosion treatment.
[0003] When bamboo piles are used to reinforce the foundation, a concrete cushion is usually set on the top of the pile to form a pile raft foundation, which can effectively improve the bearing capacity of the foundation and effectively adjust the uneven settlement of the foundation. However, when a concrete cushion is set above the bamboo piles, there is a problem of rigid mutation in the connection between the bamboo piles and the concrete, which restricts the large-scale application of bamboo piles in foundation treatment. Therefore, overcoming the rigid mutation problem of the connection between bamboo piles and concrete and achieving effective connection and joint bearing of bamboo piles and concrete rafts is a problem that needs to be solved urgently. Utility Model Content
[0004] 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 bamboo-based concrete structure for reinforcing soft foundations which can overcome the rigidity mutation problem of the connection between bamboo piles and concrete.
[0005] In order to solve the above technical problems, the technical solution proposed by the utility model is:
[0006] A bamboo-based concrete structure for reinforcing a soft foundation comprises bamboo piles, bamboo poles and a concrete cushion layer, wherein a plurality of bamboo piles and bamboo poles are provided, the plurality of bamboo piles are uniformly inserted in the soft foundation, and the upper ends of the bamboo piles are located outside the soft foundation, through holes are opened at the upper ends of the bamboo piles for the bamboo poles to pass through, and the bamboo poles are inserted in the through holes, the concrete cushion layer is cast above the soft foundation, and the upper ends of the bamboo piles and the bamboo poles are both located in the concrete cushion layer.
[0007] In the above bamboo-based concrete structure, preferably, the upper end of the bamboo pile is provided with multiple rows of through holes along different heights, and the through holes in the upper and lower adjacent rows are orthogonally distributed, and the bamboo poles are staggered and interspersed in the multiple rows of through holes at different heights in the longitudinal and transverse directions. The through holes in the upper and lower adjacent rows are orthogonally distributed. Taking the upper and lower adjacent rows as an example, it is equivalent to that two rows of holes are evenly opened on the bamboo pile, and the angle between the two rows of holes is 90 degrees, and the heights are staggered in pairs, so that it is convenient for the bamboo poles to be staggered and interspersed in the longitudinal and transverse directions. When arranging the bamboo poles, the bamboo poles in the same direction can be interspersed in the through holes at the same height, that is, the bamboo poles at the same height are arranged in the same direction, that is, the bamboo poles are arranged in the same direction at the same height, and the arrangement directions of the upper and lower adjacent bamboo poles are perpendicular. In this way, by arranging the bamboo poles staggered in the longitudinal and transverse directions, multiple bamboo poles can be combined into a bamboo raft structure, and stably arranged at the upper end of the bamboo pile, and the structural stability is better.
[0008] In the bamboo-based concrete structure, preferably, the inner cavity of the bamboo pile is a bottom-enclosed hollow structure in which only the lowest internal bamboo node is retained and other internal bamboo nodes are removed. The bamboo pile retains the lowest internal bamboo node and then removes other bamboo nodes, so that the inner cavity of the bamboo pile can be smooth, and at the same time, the lowest internal bamboo node can play a supporting and sealing role, which is convenient for pre-casting concrete core.
[0009] In the above-mentioned bamboo-based concrete structure, preferably, the bamboo pile is pre-filled with a pre-cast concrete core, the height of the pre-cast concrete core does not exceed the height position of the through hole, and the upper end of the bamboo pile is post-filled with a post-cast concrete core that is integrally cast with the concrete cushion layer. Pre-filling the pre-cast concrete core in the bamboo pile is beneficial to improving the structural strength of the bamboo pile, and is also convenient for driving the bamboo pile into a weak foundation. The pre-cast concrete core pre-filled in the bamboo pile can be prefabricated in the factory, and the above-mentioned prefabrication process can reduce on-site pouring operations. After the bamboo pole is set on the bamboo pile, the concrete cushion layer is re-cast, so that the upper end of the bamboo pile and the bamboo pole are both located in the concrete cushion layer to form a whole, which is beneficial to the smooth transition of the stiffness of the bamboo pile and the concrete cushion layer, and reduces the problem of sudden change in stiffness when the bamboo pile and the concrete cushion layer are connected.
[0010] In the bamboo-based concrete structure, preferably, the bottom of the bamboo pile is provided with a sharp corner, which is helpful for driving the bamboo pile into a soft foundation.
[0011] In the bamboo-based concrete structure, preferably, the inner and outer surfaces of the bamboo piles and the bamboo poles are provided with anti-corrosion material layers. Providing the anti-corrosion material layers is beneficial to improving the anti-corrosion performance of the bamboo material.
[0012] In the above bamboo-based concrete structure, preferably, the diameter of the bamboo pile is 8-12 cm, the length of the bamboo pile is 2-5 m, the diameter of the bamboo pole is 1-3 cm, and the length of the bamboo pole is 1.5-3 m.
[0013] In the above bamboo-based concrete structure, preferably, multiple bamboo piles are arranged in a "field" character array, the spacing k between adjacent bamboo piles is 40 - 60 cm, the upper end of the bamboo pile is 20 - 25 cm higher than the soft foundation; the vertical spacing h between adjacent upper and lower bamboo poles is not less than 0.5 cm.
[0014] The bamboo-based concrete structure for soft foundation reinforcement of the present utility model uses bamboo to reinforce the soft foundation. Bamboo has unique advantages in reinforcing soft foundations. Bamboo raw materials are easily obtainable and have low costs in many regions, which can reduce the project cost. The weight of bamboo is lighter than that of traditional piles, and transportation and construction operations are convenient, which can reduce the usage frequency of large-scale mechanical equipment and lower the construction energy consumption. The use of bamboo effectively saves the non-renewable resource of steel. The production of steel is often accompanied by high energy consumption and high pollution, while bamboo, as a renewable resource, its use alleviates the pressure on the environment to a certain extent, saves resources, protects the environment, and reduces pollution throughout the life cycle of the building. At the same time, through special structural design of bamboo, by grouting into the bamboo piles, the internal structure of bamboo is strengthened and the strength is significantly improved, which makes up for the deficiency of its initial strength to a certain extent, can enhance the stability of the foundation, and enables it to play a better role in soft foundation reinforcement projects.
[0015] Compared with the prior art, the advantages of the present utility model are as follows:
[0016] 1. The bamboo-based concrete structure for soft foundation reinforcement of the present utility model includes bamboo piles, bamboo poles, and a concrete cushion. The bamboo poles are inserted through the upper ends of the bamboo piles, and the upper ends of the bamboo piles and the bamboo poles are both located within the concrete cushion. The bamboo-based concrete structure formed in this way realizes the effective connection and common bearing of the bamboo piles and the concrete cushion, is beneficial for anti-sliding, is beneficial for resisting uneven settlement, can ensure the smooth transition of the stiffness between the concrete cushion and the bamboo piles, and reduces the problem of rigid mutation when the concrete cushion is connected to the bamboo piles.
[0017] 2. The bamboo-based concrete structure for soft foundation reinforcement of the present utility model makes full use of renewable and fast-growing raw bamboo, has advantages such as low cost, convenient material acquisition, and green and renewable materials, and has good application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0019] Figure 1It is a schematic structural diagram of a bamboo-based concrete structure for reinforcing a soft foundation according to an embodiment.
[0020] Figure 2 1 is a top view of a bamboo-based concrete structure for reinforcing a weak foundation according to an embodiment (the concrete cushion layer is not shown).
[0021] Figure 3 The diagram is a structural diagram of bamboo piles in a bamboo-based concrete structure for reinforcing a soft foundation according to an embodiment.
[0022] Figure 4 It is an enlarged schematic diagram of the connection between bamboo piles and bamboo poles in a bamboo-based concrete structure for reinforcing a soft foundation according to an embodiment.
[0023] Legend:
[0024] 1. Bamboo piles; 11. Precast concrete core; 12. Postcast concrete core; 2. Bamboo poles; 3. Concrete cushion; 4. Through holes. DETAILED DESCRIPTION
[0025] 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.
[0026] 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.
[0027] 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.
[0028] 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.
[0029] Example:
[0030] like Figure 1-Figure 4As shown in the figure, the bamboo-based concrete structure for soft foundation reinforcement in this embodiment includes bamboo piles 1, bamboo poles 2, and a concrete cushion 3. There are multiple bamboo piles 1 and bamboo poles 2. The multiple bamboo piles 1 are evenly inserted into the soft foundation, and the upper ends of the bamboo piles 1 are located outside the soft foundation. A through hole 4 for the bamboo pole 2 to pass through is opened at the upper end of the bamboo pile 1. The bamboo pole 2 is inserted through the through hole 4. The concrete cushion 3 is poured above the soft foundation, and the upper ends of the bamboo piles 1 and the bamboo poles 2 are both located within the concrete cushion 3.
[0031] As Figure 3 , Figure 4 shown in the figure, in this embodiment, multiple rows of through holes 4 are provided at different heights at the upper end of the bamboo pile 1 (this embodiment can be six rows, and other numbers of rows can be selected in other embodiments), and the upper and lower adjacent rows of through holes 4 are orthogonally distributed. The bamboo poles 2 are inserted in a staggered manner in the multiple rows of through holes 4 at different heights in the longitudinal and transverse directions.
[0032] As Figure 3 shown in the figure, in this embodiment, the inner cavity of the bamboo pile 1 is a bottom-closed hollow structure with only the lowest internal bamboo joint retained and other internal bamboo joints removed.
[0033] In this embodiment, a pre-cast concrete core 11 is pre-filled in the bamboo pile 1. The height of the pre-cast concrete core 11 does not exceed the height position of the through hole 4. A post-cast concrete core 12 integrally cast with the concrete cushion 3 is filled at the upper end of the bamboo pile 1.
[0034] In this embodiment, the bottom of the bamboo pile 1 is provided with a sharp corner.
[0035] In this embodiment, anti-corrosion material layers are provided on the inner and outer surfaces of the bamboo piles 1 and the bamboo poles 2.
[0036] In this embodiment, the diameter of the bamboo pile 1 is 8 - 12 cm, the length of the bamboo pile 1 is 2 - 5 m, the diameter of the bamboo pole 2 is 1 - 3 cm, and the length of the bamboo pole 2 is 1.5 - 3 m.
[0037] In this embodiment, the multiple bamboo piles 1 are arranged in a "field" character array. The spacing k between adjacent bamboo piles 1 is 40 - 60 cm, and the upper end of the bamboo pile 1 is 20 - 25 cm higher than the soft foundation; the vertical spacing h between the upper and lower adjacent bamboo poles 2 is not less than 0.5 cm.
[0038] Taking a more specific bamboo-based concrete structure for soft foundation reinforcement as an example, its construction process is briefly described as follows:
[0039] Step 1: Bamboo material selection. Two types of bamboo materials are used. The diameter of the bamboo pile 1 is selected as 10 cm, and the length is selected as 3.0 m; the diameter of the bamboo pole 2 is 2 cm, and the length is selected as 2.5 m. The materials are green, renewable, easily obtained, and inexpensive, which is beneficial to reducing the project cost.
[0040] Step 2: Precast holes in the bamboo pile 1. As Figure 3 As shown in the figure, drill holes with displacement on the side wall of the bamboo pile 1 to form through holes 4 with a diameter of 2.5 cm. The shortest vertical distance between the displaced holes is 0.5 cm, which is convenient for the subsequent connection of the bamboo pole 2 and the bamboo pile 1 to form an integral body.
[0041] Step 3: Remove the bamboo joints inside the bamboo pile 1. The processing factory removes the bamboo joints of the bamboo pile 1 from the bottom end, takes out the internal bamboo joints of the bamboo pile 1, leaving only the top bamboo joint. At the same time, the top end of the bamboo pile 1 is cut into a pointed shape, and the inner wall of the bamboo pile 1 is cleaned to ensure that the inner wall is unobstructed and clean.
[0042] Step 4: Preserve the bamboo. The bamboo pile 1 and the bamboo pole 2 are dried to control the moisture content. The fungi are killed by soaking in a biological fungicide, and coal tar or olive oil is fully applied 2 - 3 times to form an anti-corrosion material layer to achieve the effect of anti-corrosion and anti-mildew.
[0043] Step 5: After the bamboo pile 1 is treated with anti-corrosion, the processing factory pours concrete into it until it reaches 3.5 cm below the nearest through hole 4, forming a pre-cast concrete core 11, which reduces the process difficulty and facilitates on-site construction.
[0044] Step 6: Lay the bamboo pile 1. On the bamboo pile 1, make a mark with a marker pen at a distance of 22 cm from the hole-end. Set the hole-end of the bamboo pile 1 as the upper end, and use an excavator to slowly press the bamboo pile 1 into the soil until it reaches the marked position. Press one bamboo pile 1 every 50 cm (i.e., the spacing k), and the bamboo piles 1 are distributed in a "field" shape. As Figure 2 shown in the figure, a forms a group of bamboo piles 1 with one unit, and at the same time, the end of the bamboo pile 1 is about 22 cm above the ground, and the through holes 4 on the side wall of the bamboo pile 1 are aligned respectively, which is convenient for the subsequent insertion of the bamboo pole 2.
[0045] Step 7: As Figure 4 shown in the figure, insert the bamboo pole 2 into the through holes 4 on the side wall of the bamboo pile 1 in a staggered and crossed manner to form a six-layer bamboo raft. The spacing h between the upper and lower bamboo rafts is 1 cm, so that the bamboo raft and the bamboo pile 1 are more closely connected together, enhancing the ability of the bamboo pile 1 to resist uneven settlement.
[0046] Step 8: Set up a formwork closely to the bamboo raft and pour the concrete cushion 3 to a thickness of 25 cm. When pouring the concrete cushion 3, inject concrete into the bamboo pile 1 at the same time, so that the bamboo raft, the bamboo pile 1 and the concrete cushion 3 form an integral body, increasing the contact area between the bamboo pile 1 and the concrete cushion 3 and enhancing the integrity of the group of bamboo piles 1.
[0047] Step 9: Remove the formwork and use concrete to level the side of the concrete cushion 3 to prevent the corrosion of the concrete cushion 3 by the bamboo raft.
[0048] The bamboo-based concrete structure for reinforcing soft foundations of this embodiment is simple to construct, is low-cost and easy to obtain from local materials, is anti-slip, and is able to resist uneven settlement. It ensures a smooth transition in stiffness between the bamboo pile 1 and the concrete cushion layer 3, and reduces the problem of sudden stiffness changes when the concrete cushion layer 3 is connected to the bamboo pile 1.
[0049] 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 bamboo-based concrete structure for reinforcing soft foundations, characterized in that: It includes bamboo piles (1), bamboo poles (2) and a concrete cushion layer (3). There are multiple bamboo piles (1) and multiple bamboo poles (2). The multiple bamboo piles (1) are evenly inserted into the soft foundation, and the upper ends of the bamboo piles (1) are located outside the soft foundation. A through hole (4) for the bamboo pole (2) to pass through is opened at the upper end of the bamboo pile (1). The bamboo pole (2) is inserted through the through hole (4). The concrete cushion layer (3) is poured above the soft foundation, and the upper ends of the bamboo piles (1) and the bamboo poles (2) are both located within the concrete cushion layer (3); The inner cavity of the bamboo pile (1) is a bottom-closed hollow structure with only the bottommost internal bamboo joint remaining and other internal bamboo joints removed; a precast concrete core (11) is pre-filled in the bamboo pile (1), and the height of the precast concrete core (11) does not exceed the height position of the through hole (4). A post-cast concrete core (12) integrally cast with the concrete cushion layer (3) is filled at the upper end of the bamboo pile (1).
2. The bamboo-based concrete structure according to claim 1, characterized in that: Multiple rows of the through holes (4) are provided at different heights at the upper end of the bamboo pile (1), and the upper and lower adjacent rows of the through holes (4) are orthogonally distributed. The bamboo poles (2) are inserted in a staggered manner in the multiple rows of the through holes (4) at different heights along the longitudinal and transverse directions.
3. The bamboo-based concrete structure according to claim 1, characterized in that: The bottom of the bamboo pile (1) is provided with a sharp corner.
4. The bamboo-based concrete structure according to claim 1, characterized in that: Anticorrosion material layers are provided on the inner and outer surfaces of the bamboo pile (1) and the bamboo pole (2).
5. The bamboo-based concrete structure according to any one of claims 1 to 4, characterized in that: The diameter of the bamboo pile (1) is 8 - 12 cm, the length of the bamboo pile (1) is 2 - 5 m, the diameter of the bamboo pole (2) is 1 - 3 cm, and the length of the bamboo pole (2) is 1.5 - 3 m.
6. The bamboo-based concrete structure according to any one of claims 1 to 4, characterized in that: The multiple bamboo piles (1) are arranged in a "field" - shaped array, the spacing k between adjacent bamboo piles (1) is 40 - 60 cm, and the upper end of the bamboo pile (1) is 20 - 25 cm higher than the soft foundation; the vertical spacing h between the upper and lower adjacent bamboo poles (2) is not less than 0.5 cm.