A frost-resistant pull-out device for anti-tilting pile foundations

Abstract

This invention discloses an anti-tilting pile foundation anti-freezing and pull-out device, comprising a pile body, a pile body on the pile body, pressure sensors and temperature sensors on the side wall of the pile body, a pile base column at the bottom of the pile body, a pile groove inside the pile base column, an electromagnet inside the pile groove, and an electronic control system inside the pile body. The electronic system generates an early warning and then energizes the heating blanket on the side with higher pressure. The heating blanket releases heat, lowering the soil temperature, thereby reducing the frost heave of the soil, reducing the pile side pressure, and preventing the pile foundation from tilting. The inner wall of the pile body has a heating blanket groove, and a heating blanket is placed inside the heating blanket groove. The pile foundation anti-freezing and pull-out device of this invention is buried in the pile groove below the freezing depth and is not affected by the frost heave force of the soil. Therefore, the pile groove does not shift during the freezing and thawing process, avoiding disturbance of the deep soil by the pile bottom and ensuring the safety and stability of the underground space.

Description

Technical Field

[0001] This invention relates to the field of anti-freezing and pull-out technology for pile foundations, specifically an anti-freezing and pull-out device for anti-tilting pile foundations. Background Technology

[0002] my country is the world's third largest country in terms of permafrost, with numerous engineering projects in cold regions. Many "bridge-instead-of-road" structures are used in these projects, with pile foundations being widely applied. However, under the freeze-thaw cycles caused by seasonal changes, these pile foundations experience varying degrees of frost pull-out. Foundation frost pull-out is a common problem in cold-region engineering, referring to the cumulative vertical displacement of the foundation under the influence of soil frost heave. When other underground engineering projects are under construction near the pile foundation, a severe soil squeezing effect may occur, leading to pile foundation tilting. Frost pull-out and tilting of the pile foundation pose significant engineering safety hazards. Therefore, designing an anti-tilting pile foundation frost pull-out device is crucial for ensuring the safe use of building structures in cold regions. Thus, an improved technology is urgently needed to address this problem in existing technologies. Summary of the Invention

[0003] The purpose of this invention is to provide a pile foundation anti-freezing and anti-pulling device that prevents the pile trench from being affected by the frost heave force of the soil, thereby preventing displacement of the pile trench during the freezing, pulling and thawing process, avoiding disturbance of the deep soil by the pile bottom, and ensuring the safety and stability of the underground space, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a pile foundation anti-freezing and pull-out device for preventing tilting, comprising a pile foundation anti-freezing and pull-out device body, wherein a pile body is provided on the pile foundation anti-freezing and pull-out device body, an electronic control system is provided at the top of the pile body, a heat blanket groove is provided on the inner wall of the pile body, the heat blanket groove and the inner wall of the pile body are an integral structure, and a heat blanket is provided inside the heat blanket groove.

[0005] The bottom end of the pile body is provided with a pile base column, which is installed in conjunction with the pile body. The pile base column has a pile groove inside, and an electromagnet is installed inside the pile groove. The electromagnet is installed in conjunction with the pile groove inside the pile base column. The pile groove is a cylindrical shape with an open top and a compact bottom.

[0006] Preferably, the pile body is a cylindrical tube, and the side wall of the pile body is provided with a concrete pouring hole. A pressure sensor and a temperature sensor are installed inside the concrete pouring hole on the side wall of the pile body.

[0007] Preferably, the heating blankets inside the pile are installed at equal angles, with adjacent heating blankets inside the pile forming a 120° angle.

[0008] Preferably, an electromagnet is fitted inside the pile foundation column.

[0009] Preferably, the electronic control system is equipped with a temperature monitoring system, a pressure monitoring system, a heating blanket control system, and an electromagnet control system.

[0010] Preferably, a construction method for an anti-tilting pile foundation frost-resistant pull-out device includes the following steps:

[0011] Step 1: Pour concrete into the pouring hole according to the project requirements. A heating blanket groove is set at equal intervals along the side wall of the pile body. The heating blanket groove is used to install the heating blanket. The heating blanket generates heat after being powered on. Multiple pressure and temperature sensors are installed at equal intervals from top to bottom in each heating blanket groove. The temperature and pressure sensors are used to monitor the temperature and pressure of the soil around the pile in real time. An electromagnet is fixedly connected to the lower part of the pile body. After the electromagnet is powered on, it generates magnetic force to attract the pile body and the pile groove to each other.

[0012] Step 2: The pile trench is buried below the freezing depth. When the pile body is frozen and pulled out, the pile trench is not affected by the frost heave force of the soil. The position of the pile trench remains unchanged during the freezing, pulling out and thawing process. Mark the initial position of the pile foundation. The inner diameter of the pile trench is the same as the outer diameter of the pile body. A stretchable latex film is pasted on the upper part of the pile trench at the contact position with the pile body.

[0013] Step 3: The electronic control system determines whether the pile foundation is tilting or experiencing thawing settlement based on data collected by the pile side pressure and temperature sensors. Then, it intelligently controls the power supply and de-energization of the heating blanket and electromagnet. When the pile side pressure sensor detects unequal soil pressure around the pile in real time, the electronic control system will issue an early warning. Then, the electronic control system controls the heating blanket on the side with higher soil pressure to be energized. The heating blanket releases heat, which lowers the soil temperature, reduces the frost heave effect of the soil, and reduces the pile side pressure. The power is de-energized when the pressure sensors in all directions of the pile side detect equal pile side pressure. When the soil temperature on the pile side reaches a certain temperature, the electronic system determines that the pile foundation has begun to experience thawing settlement and controls the electromagnet to be energized for a certain period of time before de-energizing it.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) When the pile side pressure sensor detects that the soil pressure around the pile is not equal in real time, the electronic control system will generate an early warning. Then, the electronic control system will control the heating blanket on the side with greater soil pressure to be powered on. The heating blanket releases heat to lower the soil temperature, weaken the frost heave effect of the soil, and reduce the pile side pressure.

[0016] (2) The anti-freezing and pull-out device for pile foundation of the invention is buried in the pile trench below the freezing depth and is not affected by the frost heave force of the soil. Therefore, the pile trench does not shift during the freezing, pulling and thawing process, avoiding the disturbance of the deep soil by the pile bottom and ensuring the safety and stability of the underground space. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the anti-freezing and pull-out device for pile foundations of the present invention;

[0018] Figure 2 This is a schematic diagram of the pile structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal electronic control system structure of the pile column of the present invention;

[0020] Figure 4 This is a diagram showing the installation of the heating blanket according to the present invention;

[0021] Figure 5 This is a sectional view of the pile foundation column of the present invention;

[0022] Figure 6 This is a schematic diagram of the electromagnet of the present invention;

[0023] Figure 7 This is a schematic diagram of the electronic control system of the present invention.

[0024] In the diagram: 1. Pile body; 2. Pile trench; 3. Concrete pouring hole; 4. Heating blanket trench; 5. Heating blanket; 6. Pressure sensor; 7. Electromagnet; 8. Electronic control system; 9. Pile foundation column; 10. Temperature sensor; 11. Pile foundation anti-freezing device body; 12. Temperature monitoring system; 13. Pressure monitoring system; 14. Heating blanket control system; 15. Electromagnet control system. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-7 This invention provides a technical solution: an anti-tilting pile foundation anti-freezing and pull-out device, comprising a pile foundation anti-freezing and pull-out device body 11, on which a pile 1 is provided. The pile 1 is a cylindrical tube. A concrete pouring hole 3 is provided on the side wall of the pile 1. A pressure sensor 6 and a temperature sensor 10 are installed inside the concrete pouring hole 3 on the side wall of the pile 1. An electronic control system 8 is provided at the top of the pile 1. The electronic control system 8 is equipped with a temperature monitoring system 12, a pressure monitoring system 13, a heat blanket control system 14, and an electromagnet control system 15. The temperature monitoring system 12, the pressure monitoring system 13, the heat blanket control system 14, and the electromagnet control system 15 monitor the temperature and pressure values ​​of the entire pile foundation anti-freezing and pull-out device body 11 in real time to ensure the normal operation of the equipment.

[0027] The inner wall of the pile body 1 is provided with a heating blanket groove 4. The heating blanket groove 4 and the inner wall of the pile body 1 are an integral structure. The heating blanket 5 is provided inside the heating blanket groove 4. The heating blankets 5 inside the pile body 1 are installed at equal angles. The two adjacent heating blankets 5 inside the pile body 1 are at 120° apart.

[0028] The bottom end of the pile body 1 is provided with a pile base column 9, and an electromagnet 7 is installed inside the pile base column 9. The pile base column 9 is installed in conjunction with the pile body 1. The pile base column 9 is provided with a pile groove 2 inside, and an electromagnet 7 is installed inside the pile groove 2. The electromagnet 7 is installed in conjunction with the pile groove inside the pile base column 9. The pile groove 2 is a cylindrical shape with an open top and a compact bottom.

[0029] Construction method of anti-tilting pile foundation anti-freezing and pull-out device: According to the project requirements, concrete is poured into the pouring hole 3. Three heat blanket grooves 4 are equidistantly set along the side wall of the pile body. The heat blanket grooves 4 are used to install heat blankets 5. Heat blankets 5 generate heat after being powered on. Multiple pressure and temperature sensors 6 are installed equidistantly from top to bottom in the three heat blanket grooves. Temperature and pressure sensors are used to monitor the temperature and pressure of the soil around the pile in real time. Electromagnets 7 are fixedly connected to the lower part of the pile body. Electromagnets 7 generate magnetic force after being powered on, attracting the pile body 1 and the pile groove 2 to each other.

[0030] The pile trench is buried below the frost depth. When the pile body 1 is frozen and pulled out, the pile trench is not affected by the frost heave force of the soil. The position of the pile trench remains unchanged during the freezing, pulling out and thawing process. The initial position of the pile foundation is marked. The inner diameter of the pile trench 2 is the same as the outer diameter of the pile body 1. A stretchable latex film is pasted at the contact position between the upper part of the pile trench 2 and the pile body 1.

[0031] The electronic control system 8 determines whether the pile foundation is tilting or settling based on the data collected by the pile side pressure and temperature sensors 10. Then, it intelligently controls the power supply and de-energization of the heating blanket 5 and the electromagnet 7. When the pile side pressure sensor 6 detects that the soil pressure around the pile 1 is not equal, the electronic control system 8 will generate an early warning. Then, the electronic control system 8 controls the heating blanket 5 on the side with greater soil pressure to be energized. The heating blanket 5 releases heat to lower the soil temperature, weaken the frost heave effect of the soil, and reduce the pile side pressure until the pressure sensors 6 in all directions of the pile side detect that the pile side pressure is equal. When the soil temperature on the pile side reaches a certain temperature, the electronic system determines that the pile foundation has begun to settle and controls the electromagnet to be energized for a certain period of time before de-energizing it.

[0032] The main body 11 of the anti-freezing and pull-out device for the pile foundation can realize intelligent anti-tilting of the foundation. When the pressure sensors 6 at different height positions on the side of the pile body measure the soil pressure around the pile in real time and find that the soil pressure is not equal, it indicates that the pile body may tilt. The electronic system will generate an early warning. Then the electronic control system 8 can turn on the heating blanket on the side with greater pressure. The heating blanket 5 releases heat to lower the soil temperature, thereby weakening the frost heave effect of the soil, reducing the pile side pressure, and playing the role of preventing the pile foundation from tilting.

[0033] A pile groove 2 is fitted at the bottom of the pile body 1. The bottom of the pile groove 2 is dense and heavy. The pile groove 2 is buried below the frost depth. When the pile body 1 is pulled up by freezing, the pile groove 2 is not affected by the frost heave force of the soil. Therefore, the position of the pile groove remains unchanged during the frost pull-up and thawing process, which can mark the initial position of the pile foundation. During the frost pull-up stage, the pile body will move upward under the action of frost pull-up force. The soil in the bottom area of ​​the pile body 1 will accumulate in the area vacated at the bottom after the pile foundation moves upward under the action of confining pressure. When the pile foundation thaws and settles, the soil accumulated at the bottom of the foundation will hinder the pile foundation from returning to its original position. The design of the pile groove in this invention patent can prevent the soil from accumulating at the bottom of the pile body during the upward pull-up process, so that the pile body is not hindered by the soil below when thawing and settling, thereby reducing the cumulative upward pull-up position of the pile body under the action of frost heave force.

[0034] The anti-freezing and pull-out device for pile foundations of this invention is buried in the pile trench below the freezing depth and is not affected by the frost heave force of the soil. Therefore, the pile trench does not shift during the freezing, pulling, and thawing process, avoiding disturbance of the deep soil by the pile bottom and ensuring the safety and stability of the underground space.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pile foundation anti-tilting and anti-freezing device, comprising a pile foundation anti-freezing and anti-freezing device body (11), characterized in that: The pile foundation antifreeze pull-out device body (11) is provided with a pile body (1), and the top of the pile body (1) is provided with an electronic control system (8). Several heat blanket grooves (4) are equidistantly arranged along the pile side wall direction inside the pile body. The heat blanket grooves (4) and the inner wall of the pile body (1) are an integral structure. The heat blanket grooves (4) are provided with heat blankets (5) inside. The bottom end of the pile body (1) is provided with a pile base column (9), which is installed in conjunction with the pile body (1). The pile base column (9) is provided with a pile groove (2) inside, and an electromagnet (7) is provided inside the pile groove (2). The electromagnet (7) is installed in conjunction with the pile groove inside the pile base column (9). The pile groove (2) is a cylindrical shape with an open top and a compact bottom.

2. The anti-tilting pile foundation anti-freezing and pull-out device according to claim 1, characterized in that: The pile body (1) is a cylindrical tube, and the side wall of the pile body (1) is provided with a concrete pouring hole (3). A pressure sensor (6) and a temperature sensor (10) are installed inside the concrete pouring hole (3) on the side wall of the pile body (1).

3. The anti-tilting pile foundation anti-freezing and pull-out device according to claim 1, characterized in that: The heating blankets (5) inside the pile body (1) are installed at equal angles, and the two adjacent heating blankets (5) inside the pile body (1) are at 120° apart.

4. The anti-tilting pile foundation anti-freezing and pull-out device according to claim 1, characterized in that: An electromagnet (7) is fitted inside the pile foundation column (9).

5. The anti-tilting pile foundation anti-freezing and pull-out device according to claim 1, characterized in that: The electronic control system (8) is equipped with a temperature monitoring system (12), a pressure monitoring system (13), a heating blanket control system (14), and an electromagnet control system (15).

6. The construction method for implementing the anti-tilting pile foundation anti-freezing and pull-out device as described in claim 2 includes the following steps: Step 1: Concrete is poured into the concrete pouring hole (3) according to the engineering requirements. Three heat blanket grooves (4) are set at equal intervals along the side wall of the pile body. The heat blanket grooves (4) are used to install heat blankets (5). Heat blankets (5) generate heat after being powered on. Multiple pressure sensors (6) and temperature sensors (10) are installed at equal intervals from top to bottom in the three heat blanket grooves. Temperature sensors (10) and pressure sensors (6) are used to monitor the temperature and pressure of the soil around the pile in real time. Electromagnets (7) are fixedly connected to the lower part of the pile body. Electromagnets (7) generate magnetic force after being powered on, attracting the pile body (1) and the pile groove (2) to each other. Step 2: The pile trench is buried below the freezing depth. When the pile body (1) is frozen and pulled out, the pile trench is not affected by the frost heave force of the soil. During the freezing, pulling out and thawing process, the position of the pile trench remains unchanged. Mark the initial position of the pile foundation. The inner diameter of the pile trench (2) is the same as the outer diameter of the pile body (1). A stretchable latex film is pasted at the contact position between the upper part of the pile trench (2) and the pile body (1). Step 3: The electronic control system (8) determines whether the pile foundation has tilted or thawed based on the data collected by the pile side pressure sensor (6) and temperature sensor (10). Then, it intelligently controls the power supply and de-energization of the heating blanket (5) and the electromagnet (7). When the pile side pressure sensor (6) measures in real time that the soil pressure around the pile (1) is not equal, the electronic control system (8) will generate an early warning. Then, the electronic control system (8) controls the heating blanket (5) on the side with greater soil pressure to be energized. The heating blanket (5) releases heat to lower the soil temperature, weaken the frost heave effect of the soil, and reduce the pile side pressure until the pressure sensors (6) in all directions of the pile side measure that the pile side pressure is equal. When the soil temperature on the pile side reaches a certain temperature, the electronic control system determines that the pile foundation has begun to thaw and controls the electromagnet to be energized for a certain period of time before de-energizing.

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