Pile foundation system capable of preventing freezing and pulling and thaw collapse

Abstract

The utility model relates to a pile foundation system capable of preventing freezing and pulling and thaw collapse, and belongs to the field of structural engineering. The pile foundation system comprises an aluminum pipe cage arranged in the pile foundation, and a temperature control unit, a pump unit, an electricity storage device, a power generation device and a temperature monitoring device which are arranged outside the pile foundation; the temperature control unit further comprises a main control part, a heating part, a refrigerating part and a liquid storage part; the aluminum pipe cage is connected with a reinforcement cage in a pile foundation through the fixing device, the temperature monitoring device is arranged in a frozen soil area of the pile foundation, monitors the frozen soil temperature in real time and feeds back the frozen soil temperature to the main control component, then the main control component judges whether to heat or refrigerate constant-temperature liquid, and the pump unit conveys the heated or refrigerated constant-temperature liquid into the aluminum pipe cage. And the temperature control of the pile foundation is realized. The anti-freezing and anti-thaw collapse pile foundation is resistant to freezing and pulling and thaw collapse, and the structural stability of the pile foundation in the frozen soil area is improved.

Description

Technical Field

[0001] The utility model belongs to the field of structural engineering and relates to a pile foundation system with the functions of preventing freezing and thawing. Background Art

[0002] More and more infrastructure projects are being carried out in plateau permafrost areas. In infrastructure construction in seasonally frozen areas, due to the influence of geographical location and climate, pile foundations will face the challenges of freeze-up and thaw settlement. These two phenomena have a great impact on the stability of the structure and will also cause a series of problems in on-site construction difficulty and structural stability.

[0003] The freeze-pull phenomenon is mainly caused by the freezing of the pile foundation and the active layer soil under negative temperature conditions, which leads to the increase of the freezing force between the pile and the soil, and the continuous increase of the upward pull force on the pile. Eventually, the pile body will be displaced upward, tilted, pulled up, or even broken. The main manifestations of this freeze-pull phenomenon are upward pull, tilting, and pulling out, which will seriously affect the stability of the pile foundation. In terms of construction difficulty, due to the occurrence of freeze-pull phenomenon, the pile foundation may face pile body stability problems during the construction process, making it difficult to carry out the construction smoothly. In addition, if the freeze-pull phenomenon occurs in a completed project, reinforcement treatment may be required, which increases the project cost and construction difficulty.

[0004] Thaw settlement is the thawing settlement of seasonal frozen soil during the thawing process. Due to natural stress, human factors and differences in soil, thaw settlement is discontinuous in space and uneven in thickness. This uneven thaw settlement will cause settlement differences in pile foundations and affect the stability of the structure. In terms of construction difficulty, thaw settlement may cause uneven settlement of the roadbed and subgrade, which in turn affects the smoothness of the track and increases the requirements for precise control of the track during construction.

[0005] In response to these problems, current technologies usually adopt a single method of pretending to be a casing or actively cooling down, but this method is only effective in preventing freezing or thawing, and cannot achieve the effect of taking both into account. It is not effective in terms of structural stability and construction difficulty during the construction of pile foundations in seasonal frozen soil areas. Therefore, a pile foundation system and construction method that can both prevent freezing and thawing is proposed to solve the problems existing in the prior art, so as to further improve the stability of pile foundations in seasonal frozen soil areas, reduce the impact of freezing and thawing on the structure, and ensure the safety and long-term use of the project. Utility Model Content

[0006] In view of this, the purpose of the utility model is to provide a pile foundation system that is both anti-freeze-uplift and anti-thaw-settlement, to improve the stability of pile foundations in seasonally frozen areas, to reduce the impact of freeze-uplift and thaw-settlement on the structure, and to ensure the safety and long-term use of the project.

[0007] In order to achieve the above object, the utility model provides the following technical solutions:

[0008] A pile foundation system with both anti-freezing and anti-thawing functions, comprising a pile foundation and an aluminum tube cage arranged inside the pile foundation, wherein the aluminum tube cage comprises a plurality of aluminum tubes;

[0009] The pile foundation is arranged below the horizon, and the horizon includes a permafrost area; the aluminum tube cage is arranged in the permafrost area; a constant temperature liquid is injected into the aluminum tube, and the temperature of the pile foundation is kept constant by controlling the temperature of the constant temperature liquid, so as to realize the anti-freezing and anti-thawing settlement of the pile foundation system.

[0010] Optionally, the pile foundation includes a steel cage inside, and the aluminum tube cage is arranged inside the steel cage; and a plurality of aluminum tubes of the aluminum tube cage are evenly arranged in a cross shape.

[0011] Optionally, the aluminum tube cage is connected to the steel cage via a fixing device, and the fixing device includes a connected aluminum tube ring and a steel ring.

[0012] Optionally, the pile foundation system further comprises a temperature monitoring device, a temperature control unit, a pump unit, and a power storage device which are electrically connected in sequence, and the temperature monitoring device, the temperature control unit, the pump unit, and the power storage device form a closed loop; wherein the temperature control unit and the pump unit are connected to the aluminum tube cage through the aluminum tube;

[0013] Optionally, the pile foundation system further includes a power generation device electrically connected to the power storage device.

[0014] Optionally, the temperature monitoring device is arranged in the frozen soil area next to the pile foundation.

[0015] Optionally, the power generation device uses solar power generation and / or wind power generation.

[0016] Optionally, the temperature control unit, the pump unit and the aluminum tube are connected to form a closed loop.

[0017] Optionally, the temperature control unit includes a heating component, a refrigeration component and a liquid storage component which are sequentially connected through the aluminum tube, and also includes a main control component which is electrically connected to the heating component and the refrigeration component respectively, and the main control component controls the opening and closing of the heating component and the refrigeration component.

[0018] Optionally, an inlet valve and an outlet valve are sequentially arranged on the aluminum tube.

[0019] The beneficial effects of the utility model are:

[0020] (1) The pile foundation system of the present invention has a simple structure and a reasonable design, and is particularly suitable for infrastructure construction in western my country. Western my country has a wide range of needs and is rich in solar thermal and wind energy resources. The present invention can be adapted to local conditions, make full use of local clean energy, be green and environmentally friendly, and simultaneously achieve the anti-freezing and anti-thawing effects of the pile foundation system, achieving multiple goals at one stroke.

[0021] (2) The utility model adopts an active temperature control mechanism that uses heat energy for cooling and cold energy for heating, which can take into account both anti-freezing and anti-thawing settlement. Compared with a single solution, it can better meet the use of pile foundations in frozen soil areas.

[0022] (3) The aluminum tubes in the aluminum tube cage of the utility model are evenly distributed, so that the overall pile foundation has a good temperature control effect and uniform temperature conduction.

[0023] (4) The aluminum tube is installed inside the pile foundation, which can increase the structural strength of the pile foundation and is safer for smaller pile foundations. The aluminum tube cage is set inside the steel cage and does not occupy the protective layer space, ensuring the thickness of the pile foundation protective layer and the durability, bearing capacity, earthquake resistance, fire resistance and thermal insulation performance of the pile foundation.

[0024] (5) The aluminum tube cage of the utility model is lowered together with the steel cage and buried in the concrete pile. When pouring concrete, circulating cooling water is introduced into the aluminum tube cage to reduce the temperature of the concrete and solve the problem of hydration heat during the concrete pouring process.

[0025] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0027] Figure 1 It is a cross-sectional diagram of the pile foundation system;

[0028] Figure 2 It is a schematic diagram of the aluminum tube cage;

[0029] Figure 3 It is a schematic diagram of the temperature control unit;

[0030] Figure 4 It is a schematic diagram of a fixed connection device between an aluminum tube cage and a steel cage;

[0031] Figure 5This is the construction process flow chart of the pile foundation system;

[0032] Figure 6 This is the working flow chart of the temperature monitoring device and temperature control unit.

[0033] Reference numerals:

[0034] 1 inlet valve, 2 pile foundation, 3 outlet valve, 4 temperature control unit, 41 main control component, 42 heating component, 43 refrigeration component, 44 liquid storage component, 5 pump unit, 6 power storage device, 7 power generation device, 8 frozen soil line, 9 temperature monitoring device, 10 electric wire, 11 aluminum tube cage, 111 aluminum tube, 12 horizon, 13 fixing device, 131 aluminum tube ring, 132 steel bar ring, 133 bolt, 14 steel bar cage. DETAILED DESCRIPTION

[0035] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0036] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0037] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] See also Figure 1 to Figure 4It is a pile foundation system with both anti-freezing and anti-thawing properties, including a pile foundation 2 and an aluminum tube cage 11 arranged inside the pile foundation 2; the aluminum tube cage 11 includes a plurality of aluminum tubes 111, at least two of which extend out of the pile foundation 2 and are connected in sequence with a temperature control unit 4 and a pump unit 5 arranged outside the pile foundation 2; a constant temperature liquid is injected into the aluminum tubes 111.

[0039] It also includes a temperature monitoring device 9 and an electricity storage device 6, wherein the temperature monitoring device 9, the temperature control unit 4, the pump unit 5, and the electricity storage device 6 are electrically connected in sequence to form a closed loop;

[0040] In some embodiments of the utility model, the power storage device 6 adopts a large-capacity battery to store more electricity; the temperature monitoring device 9 adopts a small and sensitive temperature sensor to transmit the monitored temperature of the frozen soil area to the temperature control unit 4, and the temperature control unit 4 determines whether to heat or cool; the pump unit 5 is used to transport the constant temperature liquid heated or cooled by the temperature control unit 4 to the aluminum tube 111 for circulation, so as to achieve the heating or cooling effect on the pile foundation 2. Since the length and setting height of the aluminum tube 111 may be large, a pump with appropriate power should be selected according to actual usage.

[0041] The pile foundation 2 is arranged below the horizon 12, and the area below the horizon 12 includes a frozen soil area; the pile foundation 2 includes a steel cage 14 inside, and the aluminum tube cage 11 is arranged inside the steel cage 14; the aluminum tubes 111 of the aluminum tube cage 11 are evenly arranged in a cross shape, and the cross-connections of each aluminum tube 111 are interconnected to achieve sufficiently uniform temperature conduction between the constant temperature liquid in the aluminum tube 111 and the pile foundation 2. The aluminum tube cage 11 is arranged inside the steel cage 14 and does not occupy the thickness of the concrete protective layer, so as to ensure the durability, bearing strength, seismic performance and thermal insulation effect of the reinforced concrete pile foundation 2, making the overall structure more complete and safe.

[0042] The aluminum tube cage 11 is manufactured in the factory according to the pre-designed size and shape, and then transported to the construction site for assembly and installation. The aluminum tube cage 11 and the steel cage 14 are coaxial cylindrical, and the diameter of the aluminum tube cage 11 is smaller than the diameter of the steel cage 14. In some embodiments of the utility model, the diameter of the aluminum tube cage 11 is about 10 cm smaller than the diameter of the steel cage 14. The aluminum tube 111 is also a hollow cylinder. The diameter of the aluminum tube 111 is about 1 / 50 of the pile foundation diameter. The spacing between each aluminum tube 111 is about 1m, and the height of the aluminum tube cage 11 should be the vertical height from the bottom of the pile foundation to the frozen soil line 8. The aluminum tube cage 11 is only set in the frozen soil area, and only the temperature of the frozen soil area is controlled, which can not only ensure less heat conduction loss and high efficiency, but also save materials and costs.

[0043] The aluminum tube cage 11 and the steel bar cage 14 are connected by a fixing device 13. An embodiment of the fixing device 13 includes an aluminum tube ring 131 and a steel bar ring 132, which are fixedly connected by bolts 133 to ensure that the aluminum tube cage 11 and the steel bar cage 14 are firmly bound together; the aluminum tube ring 131 and the steel bar ring 132 can be opened to facilitate fastening the aluminum tube and the steel bar in the ring.

[0044] Another embodiment of the fixing device 13 is as follows Figure 4 As shown, the fixing device 13 has two symmetrical structures fixedly connected by bolts 133, wherein each structure is provided with two arc-shaped protrusions, and the two arc-shaped protrusions are respectively fitted with the outer edges of the aluminum tube 111 and the steel bar. The two symmetrical arc-shaped protrusions fitted with the outer edge of the aluminum tube 111 are collectively referred to as the aluminum tube sleeve 131, and the two symmetrical arc-shaped protrusions fitted with the outer edge of the steel bar are collectively referred to as the steel bar sleeve 132. The size of the two sleeves on the fixing device 13 is selected or prefabricated according to the actual diameter of the aluminum tube 111 and the steel bar. When in use, the bolts 133 are first unscrewed, the two symmetrical structures are separated and respectively sleeved on the adjacent steel bars and the aluminum tube 111, and then the bolts 133 are tightened. The structure is simple and easy to use and install.

[0045] The temperature monitoring device 9 is arranged in the frozen soil area beside the pile foundation 2 .

[0046] It also includes a power generation device 7 electrically connected to the power storage device 6; the power generation device 7 can be arranged around the pile foundation 2. According to local conditions, it is preferred to use clean energy, such as solar power generation or wind power generation, or both.

[0047] An inlet valve 1 and an outlet valve 3 are respectively provided on at least two aluminum tubes 111 extending out of the pile foundation 2. The inlet valve 1 and the outlet valve 3 are installed about one meter above the pile foundation horizon 12, and the inlet valve 1 and the outlet valve 3 are located opposite to each other on both sides of the pile foundation. Aluminum tubes 111 are installed at both ends of the inlet valve 1, and a foam protective layer is added to the outside of the aluminum tube 111 outside the pile foundation to reduce temperature consumption. The inlet valve 1 and the outlet valve 3 are electrically connected to the temperature control unit 4. After being heated or cooled by the temperature control unit 4, the constant temperature liquid is transported into the inlet valve 1 by the pump unit 5 to form a cycle.

[0048] The temperature control unit 4 includes a heating component 42, a cooling component 43 and a liquid storage component 44 which are connected in sequence through the aluminum tube 111, and also includes a main control component 41 which is electrically connected to the heating component 42 and the cooling component 43. The main control component 41 determines and issues instructions to the heating component 42 and the cooling component 43 according to the set program, and controls the heating component 42 or the cooling component 43 to start working; the heating component 42 adopts a heating method based on electric energy, and heats the constant temperature liquid in the aluminum tube 111 when it slowly enters; the cooling component 43 can adopt ordinary refrigerant, and a more suitable cooling method and device can also be selected according to actual conditions; the liquid storage component 44 adopts an insulated liquid storage tank, and the constant temperature liquid is first stored in the liquid storage tank after the treatment is completed, and then input into the aluminum tube 111 when needed.

[0049] In some embodiments of the utility model, the temperature monitoring device 9 uses a temperature sensor, drills a hole in the ground outside the pile foundation range, and installs the temperature sensor about one meter below the permafrost line 8, and then backfills with backfill soil; the power generation method of the power generation device 7 is to use local clean energy, which is green and environmentally friendly, such as solar power generation or wind power generation; the constant temperature liquid is salt water, which has the characteristics of low freezing point and good temperature conduction effect.

[0050] The pile foundation construction method applied to the above pile foundation system is as follows: Figure 5 As shown, the following steps are included:

[0051] S1, install and fix the aluminum tube cage 11, lower the aluminum tube cage 11 together with the steel cage 14 into the drilled concrete pile, pour the pile foundation 2 concrete, and connect the temperature control unit 4, the temperature monitoring device 9, the pump unit 5, the power storage device 6 and the aluminum tube 111 extending out of the pile foundation 2;

[0052] S2, the power storage device 6 transmits electric energy to the temperature control unit 4, the temperature monitoring device 9 and the pump unit 5 respectively;

[0053] S3, the temperature monitoring device 9 monitors the temperature of the frozen soil around the pile foundation 2, and feeds back the monitored temperature to the temperature control unit 4 via an electrical signal;

[0054] S4, the temperature control unit 4 determines to heat or cool the constant temperature liquid in the temperature control unit 4 according to the received temperature signal, and when the constant temperature liquid is heated or cooled to within the threshold range, the constant temperature liquid is stored in the liquid storage component 44;

[0055] S5, the pump unit 5 transports the constant temperature liquid in the liquid storage component 44 to the aluminum tube cage 11 through the aluminum tube 111, and circulates the constant temperature liquid in the aluminum tube cage 11 until the temperature monitoring device 9 detects that the frozen soil temperature around the pile foundation 2 is within the threshold range, and the pump unit 5 stops working.

[0056] In step S1, the aluminum tube cage 11 is prefabricated in the factory, and after the inlet valve 1 and the outlet valve 3 are installed, it is transported to the construction site for subsequent assembly. Among them, the temperature monitoring device 9 is installed in the frozen soil about 1m away from the outer surface of the pile foundation, and four holes are drilled around the outer surface of the pile foundation about 1m away from the outer surface of the pile foundation. The hole is deep to 1m below the frozen soil line 8, and the temperature monitoring device 9 is placed at the bottom of the hole and backfilled with backfill soil. After the temperature monitoring device 9 is installed, the constant temperature liquid is added to the liquid storage component 44 of the temperature control unit 4, and the constant temperature liquid fills all the pipes in the temperature control unit 4, and then the power generation device 7 and the power storage device 6 are installed. In some embodiments of the utility model, the temperature monitoring device 9, the temperature control unit 4, the power generation device 7 and the power storage device 6 are connected by wires 10 for power transmission, and the main control component 41 in the temperature control unit 4 and the heating component 42 and the refrigeration component 43 are also connected by wires 10 for power transmission.

[0057] In step S2, the pile foundation system includes a power generation device 7 electrically connected to the power storage device 6. The power generation device 7 transmits electric energy to the power storage device 6. The power storage device 6 first stores the electric energy, and then transmits the stored electric energy to the temperature control unit 4, the temperature monitoring device 9 and the pump unit 5 respectively when starting to work.

[0058] In steps S3 and S4, the temperature control unit 4 includes a heating component 42, a cooling component 43 and a liquid storage component 44 which are connected in sequence through the aluminum tube 111, and also includes a main control component 41 which is electrically connected to the heating component 42 and the cooling component 43 respectively; the main control component 41 receives the temperature signal transmitted from the temperature monitoring device 9, and determines whether the temperature of the frozen soil is within the threshold range, and selects to start the heating component 42 or the cooling component 43 to heat or cool the constant temperature liquid in the liquid storage component 44. After receiving the temperature information from the temperature monitoring device 9, the main control component 41, according to the set program and the temperature conditions of each place of use, when the temperature in the frozen soil area is too low and frozen pull is about to occur, the main control component 41 will choose to start the heating component 42 for heating to keep the constant temperature liquid above 5°C; when the temperature in the frozen soil area is too high and will cause thawing, the main control component 41 will start the cooling component 43 to cool down to ensure that the temperature is below 0°C.

[0059] In step S5, after heating or cooling is completed, the inlet valve 1 and the outlet valve 3 are opened through the control of the main control component 41 in the temperature control unit 4, and the pump unit 5 delivers the constant temperature liquid in the liquid storage component 44 to the aluminum tube 111 outside the pile foundation 2 through the pump unit 5, and then delivers it to the aluminum tube cage 11 inside the pile foundation 2 through the inlet valve 1. After the constant temperature liquid completes the temperature conduction in the aluminum tube cage 11, it enters the temperature control unit 4 through the outlet valve 3, and the cycle is carried out. When the temperature data monitored and transmitted back by the temperature monitoring device 9 meets the set requirements (that is, when the frozen soil will not melt or freeze), the temperature control unit 4 and the pump unit 5 stop working. At this time, only the temperature monitoring device 9 continues to monitor. If the temperature in the frozen soil area changes to outside the threshold range again, the above steps are immediately repeated, thereby realizing active temperature control of the frozen soil area. The above-mentioned "threshold range" should be determined according to the construction season and the temperature conditions in the frozen soil area.

[0060] The working process of the temperature monitoring device 9 and the temperature control unit 4 is as follows: Figure 6 As shown, the temperature monitoring device 9 monitors the temperature T0 of the frozen soil, and the main control component 41 determines whether T0 is within the threshold range T1~T2; if T0 is within the threshold range, the temperature monitoring device 9 continues to monitor the frozen soil temperature; if T0<T1, the main control component 41 controls the opening of the heating component 42 to heat the constant temperature liquid until the frozen soil temperature T0 monitored by the temperature monitoring device 9 is within the threshold range; if T0>T2, the main control component 41 controls the opening of the refrigeration component 43 to cool the constant temperature liquid until the frozen soil temperature T0 monitored by the temperature monitoring device 9 is within the threshold range.

[0061] In some embodiments of the utility model, the temperature monitoring device 9 transmits the frozen soil temperature to the temperature control unit 4 at intervals of Δt; in addition, when the temperature control unit 4 controls the temperature of the constant temperature liquid, it can choose to change the temperature of the constant temperature liquid by ΔT at intervals of Δt, thereby reducing the adverse effects of the excessively fast temperature change of the pile foundation 2 on the surrounding frozen soil. The interval time Δt and the temperature change ΔT can be adjusted according to the actual situation on site to avoid the waste of electric energy caused by frequent monitoring and data transmission.

[0062] The pile foundation 2 system of the utility model has a simple structure and reasonable design, and is particularly suitable for infrastructure construction in western my country. The western region of my country has a wide range of needs, and the local area has extremely rich light, heat and wind energy resources. The utility model can be adapted to local conditions, make full use of local clean energy, be green and environmentally friendly, and simultaneously achieve the anti-freezing and anti-thawing of the pile foundation 2 system, achieving multiple goals at one stroke. The utility model adopts an active temperature control mechanism of thermal energy cooling and cold energy heating, which can take into account both anti-freezing and anti-thawing. Compared with a single solution, it can better meet the use of pile foundations in frozen soil areas. The aluminum tubes 111 in the aluminum tube cage 11 of the utility model are evenly distributed, so that the temperature control effect of the overall pile foundation 2 is good and the temperature conduction is even; the aluminum tubes 111 are installed inside the pile foundation 2, which can increase the structural strength of the pile foundation 2 and is safer for pile foundations of smaller sizes; and the aluminum tube cage 11 is arranged inside the steel cage 14, does not occupy the protective layer space, and ensures the thickness of the protective layer of the pile foundation 2 and the durability, bearing capacity, earthquake resistance, fire resistance and thermal insulation performance of the pile foundation 2; the aluminum tube cage 11 is lowered together with the steel cage 14 and buried in the concrete pile. When pouring concrete, circulating cooling water is introduced into the aluminum tube cage 11 to reduce the temperature during pouring concrete and solve the problem of hydration heat during pouring concrete.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A pile foundation system with both anti-freezing and anti-thawing properties, characterized by: It comprises a pile foundation (2) and an aluminum tube cage (11) arranged inside the pile foundation (2), wherein the aluminum tube cage (11) comprises a plurality of aluminum tubes (111); The pile foundation (2) is arranged below the horizon (12), and the area below the horizon (12) includes a frozen soil area; the aluminum tube cage (11) is arranged in the frozen soil area; A constant temperature liquid is injected into the aluminum tube (111), and the temperature of the pile foundation (2) is kept constant by controlling the temperature of the constant temperature liquid, so as to achieve anti-freezing and anti-thawing effects on the pile foundation system; The pile foundation (2) includes a steel cage (14) inside, and the aluminum tube cage (11) is arranged inside the steel cage (14); a plurality of aluminum tubes (111) of the aluminum tube cage (11) are evenly arranged in a cross shape; The aluminum tube cage (11) and the steel bar cage (14) are connected via a fixing device (13), wherein the fixing device (13) comprises an aluminum tube sleeve ring (131) and a steel bar sleeve ring (132) connected to each other.

2. The pile foundation system with both freeze-up and thaw-sinking resistance according to claim 1, characterized in that: The pile foundation system further comprises a temperature monitoring device (9), a temperature control unit (4), a pump unit (5), and an electricity storage device (6) which are electrically connected in sequence, wherein the temperature monitoring device (9), the temperature control unit (4), the pump unit (5), and the electricity storage device (6) form a closed loop; wherein the temperature control unit (4), the pump unit (5) and the aluminum tube cage (11) are connected via the aluminum tube (111).

3. The pile foundation system with both freeze-up and thaw-sinking resistance according to claim 2 is characterized in that: The pile foundation system also includes a power generation device (7) electrically connected to the power storage device (6).

4. The pile foundation system with both freeze-up and thaw-sinking resistance according to claim 3 is characterized in that: The temperature monitoring device (9) is arranged in the frozen soil area next to the pile foundation (2).

5. The pile foundation system with both freeze-up and thaw-sinking resistance according to claim 3 is characterized in that: The power generation method of the power generation device (7) is solar power generation and / or wind power generation.

6. The pile foundation system with both freeze-up and thaw-sinking resistance according to claim 2, characterized in that: The temperature control unit (4), the pump unit (5) and the aluminum tube (111) are connected to form a closed loop.

7. The pile foundation system with both freeze-up and thaw-sinking resistance according to claim 2, characterized in that: The temperature control unit (4) comprises a heating component (42), a cooling component (43) and a liquid storage component (44) which are sequentially connected through the aluminum tube (111), and also comprises a main control component (41) which is electrically connected to the heating component (42) and the cooling component (43), respectively, and the main control component (41) controls the opening and closing of the heating component (42) and the cooling component (43).

8. The pile foundation system with both freeze-up and thaw-sinking resistance according to claim 1, characterized in that: The aluminum tube (111) is provided with an inlet valve (1) and an outlet valve (3) in sequence.

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