Bionic bone spur type reinforcement device and construction method of reaction pile

Abstract

The present invention belongs to the technical field of pile foundation construction reinforcement. A bionic bone spur type reinforcement device and construction method for a reaction pile are provided, the reinforcement device comprising: a pile body, a grouting pipe, a fixed pipe and a grouting pipe head, the grouting pipe is arranged inside the pile body, the grouting pipe is connected and communicated with the grouting pipe head; one end of the grouting pipe head is communicated with the grouting pipe, the fixed pipe and the grouting pipe are at a set angle, the other end of the grouting pipe head is communicated with the first end of the fixed pipe, the second end of the fixed pipe is a grouting port, and a one-way valve is arranged on the grouting port; the fixed pipe is penetrated in the pile body, and the second end of the fixed pipe penetrates the outer wall of the pile body, so as to be used for pouring grouting material into the soil around the pile outside the pile body to form a barbed grouting body; the present invention can quickly and stably form a barbed reaction pile, thereby effectively enhancing the bearing capacity of the composite foundation and reducing the deformation of the pile foundation induced by external loads.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundation construction reinforcement, and in particular to a reaction pile bionic bone spur type reinforcement device and a construction method. Background Art

[0002] The statements in this section merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Pile foundation is a foundation form with high bearing capacity, wide application range and long history. With the improvement of production level and the development of science and technology, the types, processes, design theories, calculation methods and application scope of pile foundations have greatly developed and are widely used in high-rise buildings, ports, bridges and other projects. In construction projects, the barb device is set on the side of the pile to form a pile-barb grouting body-soil composite foundation, thereby increasing the lateral friction resistance of the pile-soil interface and improving the bearing capacity of the pile foundation. This technology increases the friction coefficient between the soil and the pile body by setting a barb structure of a certain shape and size on the side of the pile body, thereby increasing the pull-out and anti-overturning capabilities of the pile foundation.

[0004] The barb structure has various forms, including flange plates, grooved plates, transverse strips, etc. Its design and construction need to consider the mechanical properties of the soil and the stress conditions of the pile foundation. This technology has been widely used in projects such as soft foundations and high-rise buildings. However, there are some difficulties and defects in constructing pile foundations in soft strata. First, the mechanical properties of soft strata are poor and insufficient to support the bearing requirements of traditional pile foundations, so special design and reinforcement measures are required; second, the settlement and deformation of the soil in soft strata are large, which can easily lead to settlement and uneven settlement of the pile foundation, affecting the stability of the building; in addition, the groundwater level and soil humidity in soft strata are high, which may have an adverse effect on the stability of the pile foundation. Therefore, when constructing pile foundations in soft strata, it is necessary to fully consider the stratum conditions and adopt corresponding reinforcement and prevention measures to ensure the safety and reliability of the pile foundation.

[0005] In current technology, the barbs set on the pile body are usually made of metal materials, are short in length, and can only provide a small negative friction resistance; in addition, in soil rich in organic matter or backfill garbage, the metal barbs are prone to corrosion; in addition, when the barbed piles are set by mechanical devices, the barbed piles are not easy to penetrate deep into the soil. Summary of the invention

[0006] In order to solve the technical problems of small bearing capacity and pile side friction resistance when constructing pile foundations in soft strata, the present invention provides a bionic bone spur type reinforcement device and construction method for reaction piles, which can quickly and stably form barbed reaction piles, thereby effectively enhancing the bearing capacity of the composite foundation and reducing the deformation of the pile foundation induced by external loads. It has the advantages of significant foundation reinforcement, soil stabilization, anti-water gushing effect and convenient construction in foundation engineering.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a reaction pile bionic bone spur reinforcement device.

[0009] A bionic bone spur type reinforcement device for a reaction pile, comprising: a pile body, a grouting pipe, a fixing pipe and a grouting pipe head, wherein the grouting pipe is arranged inside the pile body, and the grouting pipe is connected and communicated with the grouting pipe head;

[0010] One end of the grouting pipe head is connected to the grouting pipe, the fixed pipe and the grouting pipe form a set angle, the other end of the grouting pipe head is connected to the first end of the fixed pipe, the second end of the fixed pipe is a grouting port, and a one-way valve is provided on the grouting port;

[0011] The fixing pipe is inserted into the pile body, and the second end of the fixing pipe passes through the outer wall of the pile body, so as to be used for pouring grout into the soil around the pile outside the pile body to form a barbed grouting body.

[0012] As a further limitation of the first aspect of the present invention, one end of the grouting pipe head is connected to the grouting pipe via a spiral thread.

[0013] As a further limitation of the first aspect of the present invention, the angle between the grouting pipe and the fixed pipe is 60°.

[0014] As a further limitation of the first aspect of the present invention, the grouting pipes include a plurality of grouting pipes, and the plurality of grouting pipes are evenly arranged in a reversed manner inside the pile body.

[0015] As a further limitation of the first aspect of the present invention, the grouting pipe is connected to the steel cage of the pile body through a grouting pipe support frame.

[0016] As a further limitation of the first aspect of the present invention, the grouting pipe support frame is a support frame made of stainless steel.

[0017] As a further limitation of the first aspect of the present invention, the fixed pipe is a fixed steel pipe.

[0018] As a further limitation of the first aspect of the present invention, the one-way valve includes a rubber mold and a fixing member, and the rubber mold is fixed to the upper part of the second end of the fixed pipe through the fixing member to form the one-way valve.

[0019] As a further limitation of the first aspect of the present invention, the barbed grouting body is fixed to the pile body.

[0020] In a second aspect, the present invention provides a construction method of the above-mentioned reaction pile bionic bone spur reinforcement device, comprising the following process:

[0021] According to the design requirements, select the grouting pipe of suitable size and drill holes on the pile body to connect the grouting fixing pipe;

[0022] Carry out rust-proof treatment inside and outside the grouting pipe, assemble the grouting pipe, and weld the fixing bracket;

[0023] Connect the fixed bracket to the steel cage and keep the grouting pipe inside the pile body;

[0024] A one-way valve is installed on the grouting port to prevent the grouting port from being blocked before grouting, and the top of the grouting pipe is sealed for protection;

[0025] Prepare grouting slurry for injection into grouting pipes;

[0026] Use a high-pressure grouting pump to inject the grouting slurry into the grouting pipe to ensure that the mixture fills the entire hole and is fully enriched. The grouting slurry enters the soil around the pile outside the pile body through the grouting pipe, grouting pipe head and fixed pipe to form a barbed grouting body;

[0027] Wait for the barbed grouting body to fully solidify and dry, ensure that the barbed grouting body is firmly combined with the soil around the pile, and make the barbed grouting body, grouting pipe, pile body and fixing pipe form a whole.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention innovatively proposes a bionic spur-type reinforcement device for a reaction pile, wherein one end of the grouting pipe head is connected to the grouting pipe, the fixed pipe forms a set angle with the grouting pipe, and the second end of the fixed pipe passes through the outer wall of the pile body to be used for pouring grouting into the pile surrounding soil outside the pile body to form a barbed grouting body, which can quickly pour to form a barbed reaction pile, effectively enhance the bearing capacity of the composite foundation, reduce the deformation of the pile foundation induced by external loads, and thus provide a stable and solid foundation support.

[0030] 2. The barbed reaction piles of the present invention form a three-dimensional network structure in the soil, which effectively improves the interfacial shear strength of the pile-soil system, reduces the loosening and diffusion of the soil, and improves the soil's anti-scouring and anti-deformation capabilities, which is particularly important for areas with unstable soils, can reduce foundation settlement and deformation problems, and ensure the safety and durability of buildings.

[0031] 3. The barbed reaction piles formed by the present invention can also play a role in resisting water gushing. The three-dimensional network structure helps to reduce the penetration of water in the soil and improve the impermeability of the foundation, thereby avoiding the influx of groundwater, reducing the loss and deformation of the foundation and soil, and effectively protecting the structural stability of the foundation.

[0032] 4. The present invention uses barbed reaction piles for foundation treatment, which can effectively reduce the depth of earth excavation and the amount of earth and stone excavation and transportation, thereby saving construction time and cost and improving engineering construction efficiency.

[0033] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0035] Figure 1 A grouting pipe layout diagram provided by the present invention;

[0036] Figure 2 The overall cross-sectional view of the grouting pipe provided by the present invention;

[0037] Figure 3 A local schematic diagram of grouting provided by the present invention;

[0038] Among them, 1. Pile body; 2. Grouting pipe; 3. Grouting pipe support frame; 4. Soil around the pile; 5. Grouting pipe head; 6. One-way valve; 7. Barbed grouting body; 8. Fixed steel pipe; 9. Spiral thread. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0041] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0042] Embodiment 1:

[0043] In this implementation, a reaction pile bionic bone spur reinforcement device is proposed, such as Figure 1 , Figure 2 and Figure 3As shown, it comprises: a pile body 1, a grouting pipe 2, a fixed pipe 8 (playing the role of grouting and connecting the barbed grouting body 7 and the pile body 1) and a grouting pipe head 5, wherein the grouting pipe 2 is arranged inside the pile body 1, and the grouting pipe 2 is connected and communicated with the grouting pipe head 5;

[0044] One end of the grouting pipe head 5 is connected to the grouting pipe 2, and the fixed pipe 8 forms a set angle with the grouting pipe 2. The other end of the grouting pipe head 5 is connected to the first end of the fixed pipe 8. The second end of the fixed pipe 8 is a grouting port, and a one-way valve 6 is provided on the grouting port. The fixed pipe 8 is penetrated in the pile body 1, and the second end of the fixed pipe 8 penetrates the outer wall of the pile body 1 to be used for pouring grouting into the pile surrounding soil 4 outside the pile body 1 to form a barbed grouting body 7 (a number of barbed grouting bodies 7 are connected to the grouting holes, and the formed barbed grouting bodies 7 and the pile body are completely consolidated).

[0045] In this implementation, the grouting pipe 2 is customized according to the design requirements and is divided into sections of 1 m, and each section is connected by a spiral thread 9.

[0046] In this implementation, preferably, one end of the grouting pipe head 5 is connected to the grouting pipe 2 via a spiral thread 9.

[0047] In the present implementation, preferably, the angle between the grouting pipe 2 and the fixed pipe 8 is 60° (ensuring that the angle between the barbed grouting body 77 and the pile body 1 is 60 degrees, forming a barb shape); it can be understood that the angle here can be other angles, such as 45°, 50°, etc., and those skilled in the art can choose according to the specific working conditions, which will not be repeated here.

[0048] In the present implementation, preferably, the grouting pipes 2 include a plurality of grouting pipes, and the plurality of grouting pipes 2 are evenly arranged on the inner side of the pile body 1 in a reverse direction. In this way, a relatively uniform barbed grouting body 7 can be formed around the lower part of the pile body 1, which can effectively ensure the stability of the overall structure.

[0049] In this implementation, preferably, the grouting pipe 2 is connected to the steel cage of the pile body 1 through a grouting pipe support frame 3, the grouting pipe support frame 3 is a support frame made of stainless steel, and the grouting pipe 2 support adopts short steel bars with a diameter of 1 cm.

[0050] In the present implementation, preferably, the fixed pipe 8 is a fixed steel pipe, and the grouting fixed steel pipe is made of 3 cm stainless steel pipe material, or other materials such as hard plastic, etc. can be used, which will not be repeated here.

[0051] In the present implementation, preferably, the one-way valve 6 includes a rubber mold and a fixing part, and the rubber mold is fixed to the upper part of the second end of the fixed pipe 8 by the fixing part to form the one-way valve 6 (the one-way valve 6 uses a rubber film to prevent the soil 4 around the pile from entering the fixed steel pipe and causing blockage); or, it can be understood that the one-way valve 6 design commonly available on the market can also be adopted, which will not be repeated here.

[0052] In this implementation, preferably, after the pouring is completed, the barbed grouting body 7 is fixedly connected to the pile body 1 to form a stable integral structure.

[0053] Embodiment 2:

[0054] This implementation provides a construction method of the reaction pile bionic bone spur reinforcement device described in Example 1, comprising the following steps:

[0055] Step 1: Make the grouting pipe 2. According to the requirements of the design drawings, select a grouting pipe of appropriate size. Drill holes at designated locations and connect the grouting pipe to the fixed steel pipe 8 to ensure the stability and safety of the grouting pipe 2.

[0056] Step 2: Anti-rust treatment. In order to extend the service life of the grouting pipe 2, it is necessary to perform anti-rust treatment on the inside and outside. At the same time, assemble the grouting pipe 2 and weld the fixing bracket 3 to ensure that the grouting pipe 2 remains stable during the construction process.

[0057] Step 3: Connect the fixed support 3. Connect the fixed support 3 to the pile body reinforcement cage to ensure that the grouting pipe 2 is located inside the pile body. This can prevent the grouting pipe 2 from moving or sliding during the grouting process, thereby ensuring the grouting effect.

[0058] Step 4: Install the grouting check valve 6. Install the grouting check valve 6 on the fixed steel pipe 8 to ensure that it will not be blocked before grouting. At the same time, the top of the grouting pipe 2 is sealed to protect the grouting pipe from the external environment.

[0059] Step 5: Prepare cement mixture. According to the design requirements, mix cement with water to make a cement mixture with appropriate consistency and viscosity. This can ensure the smoothness of injection into the grouting pipe and the grouting effect.

[0060] In this implementation, preferably, in this embodiment, a mixture of high-strength cement and fine steel fibers is selected to further improve the shear strength of the grouting body 7 and increase the pile side friction resistance.

[0061] In this implementation, a mixture of high-strength cement and fine steel fibers is selected as the main component of the grouting body. This mixture has excellent mechanical properties and durability. High-strength cement has high strength and hardening speed, which can ensure that the grouting body obtains sufficient strength in a short time to withstand various stresses generated during pile foundation construction; in addition, high-strength cement also has good permeability and hydrophilicity, which is conducive to the uniform diffusion of slurry in the soil layer on the side of the pile and improves the friction resistance on the side of the pile; the addition of fine steel fibers helps to improve the shear strength and tensile strength of the grouting body; steel fibers play a skeleton role in the grouting body, which can effectively disperse and transfer stress, so that the grouting body has better toughness and ductility during the stress process.

[0062] Step 6: Grouting. Use a high-pressure grouting pump to inject the cement mixture into the grouting pipe to ensure that the mixture fully fills the entire hole, thereby strengthening the pile foundation.

[0063] Step 7: Wait for the cement mixture to solidify. After the grouting is completed, it is necessary to wait for the cement mixture to fully solidify and dry. This process can ensure that the cement is firmly bonded to the foundation, so that the grouting cement and the grouting pipe form a whole, thereby improving the stability of the grouting body.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bionic bone spur type reinforcement device for reaction piles, characterized in that: include: A pile body, a grouting pipe, a fixing pipe and a grouting pipe head, wherein the grouting pipe is arranged inside the pile body and is connected and communicated with the grouting pipe head; One end of the grouting pipe head is connected to the grouting pipe, and the fixed pipe and the grouting pipe are at a set angle. The other end of the grouting pipe head is connected to the first end of the fixed pipe, and the second end of the fixed pipe is a grouting port, on which a one-way valve is provided; The fixing pipe is inserted into the pile body, and the second end of the fixing pipe passes through the outer wall of the pile body, so as to be used for pouring grout into the soil around the pile outside the pile body to form a barbed grouting body.

2. The reaction pile bionic bone spur reinforcement device according to claim 1, characterized in that: One end of the grouting pipe head is communicated with the grouting pipe through a spiral threaded interface.

3. The reaction pile bionic bone spur reinforcement device according to claim 1, characterized in that: The included angle between the grouting pipe and the fixed pipe is 60°.

4. The reaction pile bionic bone spur reinforcement device according to claim 1, characterized in that: The grouting pipes include a plurality of grouting pipes, and the plurality of grouting pipes are evenly arranged inside the pile body in a reversed direction.

5. The reaction pile bionic bone spur reinforcement device according to claim 1, characterized in that: The grouting pipe is connected to the steel cage of the pile body through a grouting pipe support frame.

6. The reaction pile bionic bone spur reinforcement device according to claim 5, characterized in that: The grouting pipe support frame is made of stainless steel.

7. The reaction pile bionic bone spur reinforcement device according to claim 1, characterized in that: The fixed pipe is a fixed steel pipe.

8. The reaction pile bionic bone spur reinforcement device according to claim 1, characterized in that: The one-way valve comprises a rubber mold and a fixing member, and the rubber mold is fixed to the upper part of the second end of the fixing pipe through the fixing member to form the one-way valve.

9. The reaction pile bionic bone spur reinforcement device according to claim 1, characterized in that: The barbed grouting body is fixed to the pile body.

10. A construction method for the reaction pile bionic bone spur reinforcement device according to any one of claims 1 to 9, characterized in that: The process includes: According to the design requirements, select the grouting pipe of suitable size and drill holes on the pile body to connect the grouting fixing pipe; Carry out rust-proof treatment inside and outside the grouting pipe, assemble the grouting pipe, and weld the fixing bracket; Connect the fixed bracket to the steel cage and keep the grouting pipe inside the pile body; A one-way valve is installed on the grouting port to prevent the grouting port from being blocked before grouting, and the top of the grouting pipe is sealed for protection; Prepare grouting slurry for injection into grouting pipes; Use a high-pressure grouting pump to inject the grouting slurry into the grouting pipe to ensure that the mixture fills the entire hole and is fully enriched. The grouting slurry enters the soil around the pile outside the pile body through the grouting pipe, grouting pipe head and fixed pipe to form a barbed grouting body; Wait for the barbed grouting body to fully solidify and dry, ensure that the barbed grouting body is firmly combined with the soil around the pile, and make the barbed grouting body, grouting pipe, pile body and fixing pipe form a whole.

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