Polar region engineering-oriented reinforced and toughened ice material composite foundation and use method

Abstract

The invention discloses a reinforcing and toughening ice material composite foundation for polar region engineering, and particularly relates to the technical field of foundations, the reinforcing and toughening ice material composite foundation comprises a first foundation base, a second foundation base is arranged at the top of the first foundation base, and a supporting assembly is arranged between the first foundation base and the second foundation base; the supporting assembly comprises a first base plate arranged in the middle of the second foundation base, a second base plate is arranged in the middle of the first foundation base, and the first base plate and the second base plate are arranged in a stacked mode. The first base plate and the second base plate are formed by stacking the multiple layers of carbon fiber reinforced ice composite plates, and after basalt fibers and nano zirconium oxide are doped for reinforcement, the defects that pure ice is low in strength and poor in toughness are effectively overcome, so that the second foundation base achieves height fine adjustment within a certain range relative to the first foundation base; height change and ice surface settlement caused by ice layer freezing and thawing can be adapted in real time, it is ensured that the upper structure is always in a horizontal stable state, and the problem that a traditional foundation cannot be dynamically adapted to polar region ice surface deformation is solved.

Description

Technical Field

[0001] This invention belongs to the field of foundation technology, specifically relating to a reinforced and toughened ice material composite foundation for polar engineering and its application method. Background Technology

[0002] As a crucial global area for scientific research, resource development, and strategic security, the polar regions place stringent demands on the adaptability of foundation structures for engineering construction. The polar environment maintains extreme low temperatures of -40℃ to -60℃ for extended periods, and is characterized by frequent freeze-thaw cycles, minor crustal vibrations, and uneven ice surface settlement. Traditional foundation technologies face multiple bottlenecks: Firstly, the tensile strength of concrete and conventional soil foundations decreases by more than 70% below -40℃, significantly increasing the risk of brittle fracture and making them unable to withstand the temperature fluctuations and mechanical loads of the polar environment. Furthermore, the transportation cost of imported building materials is 5-8 times higher than in conventional areas, substantially increasing the total project cost. Secondly, while polar regions are rich in natural ice resources, pure ice itself has inherent defects. Its compressive strength is only 2-3 MPa, its toughness is poor, and its elongation at break is less than 0.5%. It is prone to cracking or even disintegration under load impact or temperature changes, making it unsuitable as a stable load-bearing foundation. In addition, the polar ecosystem is fragile, and the transportation and laying of large quantities of imported building materials would damage the original ice surface ecosystem, failing to meet the requirements of environmental protection and sustainable development. Existing foundation technologies have failed to effectively address the three core needs of "adapting to the low-temperature environment, reducing project costs, and protecting the polar ecosystem."

[0003] With the expansion of polar research stations, the construction of oil and gas development facilities, and the planning of transpolar transportation corridors, there is a need for a foundation structure that can make full use of local natural ice resources, adapt to extreme low-temperature environments, possess high strength and stability, and is easy to construct, environmentally friendly, and sustainable. This is to solve prominent problems such as low-temperature brittleness of traditional foundations, high transportation costs, insufficient mechanical properties of pure ice, and ecological damage, and to support the safe, stable construction and long-term operation of polar engineering projects. Summary of the Invention

[0004] To address the aforementioned issues, this invention discloses a reinforced and toughened ice material composite foundation for polar engineering. Through improvements in materials and structure, it is adapted to extreme low-temperature environments, possesses high strength and high stability, and can fully utilize local natural ice resources. It is also convenient and environmentally friendly to construct.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A reinforced and toughened ice material composite foundation for polar engineering includes a first foundation, a second foundation on top of the first foundation, and a support assembly between the first foundation and the second foundation. The support assembly includes a first pad disposed in the middle of the second foundation, and a second pad disposed in the middle of the first foundation, with the first pad and the second pad stacked on top of each other. The bottom of the first pad and the top of the second pad are respectively provided with a plurality of limiting frames, and each limiting frame is hinged with a first hinge rod. A second hinge rod is hinged to the first hinge rod. One side of the second hinge rod extends to the limiting frame and is hinged to the limiting frame. A limiting sleeve is fixedly provided in the middle of the second hinge rod. A top rod is embedded in the middle of the limiting sleeve. A slider is provided at the end of the top rod. The sliders belonging to the two stacked limiting frames are in contact with each other, so that when the first hinge rod and the second hinge rod deflect, the adjacent sliders abut together to lift the first pad and adjust the height of the second base. A connecting frame is provided between the second foundation and the first pad. Several docking plates are provided on the outside of the connecting frame, and several energy-absorbing bags are provided on each docking plate. The energy-absorbing bags are used to absorb the amplitude generated by crustal movement.

[0006] Optionally, in one possible implementation, the connecting frame includes several reinforcing central crossbars and locking frames, with the locking frames sleeved on the ends of the reinforcing central crossbars and engaging with them to enable rapid on-site assembly. A motor is provided on one side of the limiting frame, with the output end of the motor passing through the limiting frame and extending to one end of the first hinge rod. The motor drives the first hinge rod to deflect, which in turn causes the second hinge rod and the limiting sleeve to deflect, thereby driving the top rod and the slider to adjust their angles, allowing two adjacent top rods to change from an angled state to a vertical state. An extension plate is sleeved on the energy-absorbing bag, with traction rods provided at the top and bottom of the extension plate, and each traction rod extending to the first pad and the second pad respectively. The traction rods are used to connect the first pad, the second pad, the extension plate, the energy-absorbing bag, the docking plate, and the connecting frame together, ensuring the stability of the opposing displacement of the first pad and the second pad, while also reducing the amplitude generated by crustal or ice layer movement. The first pad has several first extended support rods hinged to its outer side, and the second pad has several second extended support rods hinged to its outer side. One end of each of the first and second extended support rods is hinged to a hinge plate, and each pair of adjacent hinge plates is hinged to an oblique extension rod. The first and second pads each include several composite plates, and several buffers are provided between adjacent composite plates to keep each composite plate in an elastic support state. The cross-sections of the second foundation and the first foundation are both set as polygons, and the second foundation covers the first foundation and is slidably connected to the first foundation to achieve splicing as needed.

[0007] The beneficial effects of this invention are as follows: 1. This invention significantly improves the core mechanical properties of the foundation through the layered reinforcement design of the composite pad. The first and second pads are made of multi-layer carbon fiber reinforced ice composite plates. After being reinforced with basalt fiber and nano-zirconia, it effectively makes up for the shortcomings of low strength and poor toughness of pure ice. With the buffer between adjacent composite plates, it improves the bearing capacity of the foundation and completely solves the pain point of low temperature failure of traditional foundations. 2. This invention addresses the problem of uneven settlement of polar ice surfaces and difficulty in adapting foundation height by using adjustable support components to achieve precise height adaptation. By using a motor to drive the first and second hinged rods to deflect, the top rod and sliding ball are linked, allowing the second foundation to make minor height adjustments relative to the first foundation within a certain range. This enables real-time adaptation to height changes and ice surface settlement caused by ice thawing, ensuring the superstructure remains horizontally stable and solving the problem of traditional foundations being unable to dynamically adapt to polar ice surface deformation. 3. This invention addresses the amplitude impact problem caused by polar crustal vibrations and ice layer movement by employing an energy-absorbing and vibration-damping system to achieve multi-dimensional seismic energy reduction. The energy-absorbing bladders on the outer side of the connecting frame are filled with an elastomer to absorb vibration energy. Combined with the rigid connection and limiting of each component by the traction rod, lateral displacement is effectively restricted, attenuating the vibration amplitude. Simultaneously, the elastic support of the buffer disperses the stress generated by instantaneous loads, preventing localized stress concentration and significantly improving the stability of the foundation under dynamic loads, thus solving the problem of vibration damage to foundation structures in polar environments. 4. This invention simplifies the construction process through modular splicing design. The first and second foundations adopt a polygonal structure, combined with a quick-connect method using a reinforced central crossbar and locking frame, allowing for multi-unit splicing without on-site welding, significantly improving construction efficiency. Simultaneously, each component adopts a modular design, facilitating polar transportation and on-site assembly, solving the problems of complex and poor adaptability in traditional foundation construction, reducing construction difficulty and safety risks in extreme environments, significantly reducing the use of external building materials, and resolving the conflict between traditional foundation engineering and polar environmental protection requirements. 5. Based on the foundation splicing, this invention expands the bearing area through an extended support structure; the first extended support rod, the second extended support rod, and the inclined extension rod form a triangular stable support system, which extends the foundation support range outward and ensures the contact stability between the foundation and the ice surface, avoiding the ice surface from cracking due to excessive local stress, and further improving the bearing stability of the foundation on the soft ice surface of the polar region, forming a dual protection system of core bearing and extended dispersion. Attached Figure Description

[0008] Figure 1 This is a front view of the overall structure of the present invention.

[0009] Figure 2 This is a schematic diagram of the support component of the present invention.

[0010] Figure 3 This is a side view of the overall structure of the present invention.

[0011] Figure 4 This is a schematic diagram of the first pad, second pad, limiting frame, motor, top rod, reinforcing central crossbar, and locking frame of the present invention.

[0012] Figure 5 This is a schematic diagram of the limiting frame, first hinge rod, second hinge rod, limiting sleeve, top rod, slider and motor of the present invention.

[0013] Figure 6 This is a schematic diagram of the first pad, second pad, locking frame, reinforcing central crossbar, docking plate, energy-absorbing bag, extension plate and traction rod of the present invention.

[0014] Figure 7 This is a schematic diagram of the first extension support rod, the second extension support rod, the hinge plate, and the inclined extension rod of the present invention.

[0015] Figure 8 This is a schematic diagram showing the various first and second foundations of the present invention assembled together.

[0016] List of identifiers in attached diagrams: 1. First foundation; 2. Second foundation; 3. First pad; 4. Second pad; 5. Limiting frame; 6. First hinge rod; 7. Second hinge rod; 8. Limiting sleeve; 9. Top rod; 10. Sliding ball; 11. Motor; 12. Buffer; 13. Reinforcing center crossbar; 14. Locking frame; 15. Connecting plate; 16. Energy-absorbing bag; 17. Extension plate; 18. Traction rod; 19. First outer extension support rod; 20. Second outer extension support rod; 21. Hinge plate; 22. Inclined extension rod. Detailed Implementation

[0017] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Example

[0018] The reinforced and toughened ice material composite foundation disclosed in this embodiment is applicable to the foundation construction scenario of the newly built scientific research laboratory at Zhongshan Station in Antarctica.

[0019] A reinforced and toughened ice material composite foundation for polar engineering includes a first foundation 1, a second foundation 2, and an intermediate support assembly. Both the first foundation 1 and the second foundation 2 have a regular hexagonal cross-section. Figure 8 As shown, all are made of Q355 low-temperature resistant steel and coated with polyurea anti-corrosion coating to ensure no risk of brittleness at -60℃; The support assembly includes a first pad 3 disposed in the middle of the second foundation 2, and a second pad 4 disposed in the middle of the first foundation 1. The first pad 3 and the second pad 4 are stacked together. Both the first pad 3 and the second pad 4 are composed of multiple layers of carbon fiber reinforced composite panels. Figure 6 As shown, basalt fiber and nano-zirconia are incorporated into the composite board, and several buffers 12 made of polyurethane, butyl rubber or silicone rubber are evenly distributed between adjacent composite boards. A plurality of limiting frames 5 are respectively provided at the bottom of the first pad and the top of the second pad, and a first hinge rod 6 is hinged to each limiting frame. A second hinge rod 7 is hinged to the first hinge rod 6. One side of the second hinge rod 7 extends to the limiting frame and is hinged to the limiting frame 5. A limiting sleeve 8 is fixedly provided in the middle of the second hinge rod 7. A top rod 9 is embedded in the middle of the limiting sleeve 8. A slider 10 is provided at the end of the top rod 9. A motor 11 is provided on one side of the limiting frame 5. The limit bracket 5 is a stainless steel stamping part. Several limit brackets 5 are set for each set of pads, and are evenly distributed at the four corners of the pad. Figure 2 As shown; the first hinge rod 6 and the second hinge rod 7 are made of titanium alloy, and the hinge is equipped with a self-lubricating bearing; the end ball 10 of the push rod 9 is a silicon nitride ceramic ball, and the drive motor 11 is a DC geared motor, which is suitable for working environment at -50℃. A connecting frame is provided between the second foundation 2 and the first pad 3. The connecting frame includes several reinforcing central crossbars 13 and locking frames 14. Several docking plates 15 are provided on the outside of the connecting frame, and several energy-absorbing bags 16 are provided on each docking plate 15. An extension plate 17 is sleeved on the energy-absorbing bag 16, and a traction rod 18 is provided at the top and bottom of the extension plate 17. The reinforcing center crossbar 13 is made of hollow square steel, and the locking frame 14 is a cast aluminum part with elastic claws on the inside. Figure 4 As shown; the docking plate 15 is a steel plate stamping part, and several energy-absorbing bags 16 are evenly distributed on each docking plate 15. The energy-absorbing bags 16 are made of butyl rubber or silicone rubber and filled with polyisobutylene elastomer. The extension plate 17 is an FRP composite material plate and the traction rod 18 is a stainless steel threaded rod equipped with an anti-loosening nut. The outer side of the first pad 3 is hinged with a plurality of first extension rods 19, and the outer side of the second pad 4 is hinged with a plurality of second extension rods 20. One end of each of the plurality of first extension rods 19 and second extension rods 20 is respectively hinged to a hinge plate 21, and each pair of adjacent hinge plates 21 is hinged with a diagonal extension rod 22.

[0020] The first outer extension rod 19, the second outer extension rod 20, the hinge plate 21, and the inclined extension rod 22 are all made of high-strength aluminum alloy, and the hinge joints are sealed with low-temperature grease. Example

[0021] The size of the first base 1 is smaller than that of the second base 2. During installation, the first base 1 is first placed horizontally on the compacted polar ice surface, and the levelness error is adjusted to ≤3‰. Then, the second base 2 is placed on top of the first base 1, ensuring that the two slide together smoothly. Figure 1 As shown; A limiting frame 5 is welded to the bottom of the first pad 3 and the top of the second pad 4 at corresponding positions. One end of the first hinge rod 6 is hinged to the inside of the limiting frame 5, and the other end is hinged to the bottom of the second hinge rod 7. The top side of the second hinge rod 7 is hinged to the limiting frame 5. A limiting sleeve 8 is welded to the middle of the second hinge rod 7. The top rod 9 is embedded into the limiting sleeve 8 and fixed with a pin to ensure that the sliding balls 10 on the two stacked limiting frames 5 are in close contact. Figure 5 As shown; the motor 11 is fixed to the outside of the limiting frame 5, and the output end of the motor 11 passes through the limiting frame 5 and is keyed to one end of the first hinge rod 6; The composite panels are spliced ​​together using buffer 12 to form a first pad 3 and a second pad 4. The buffer 12 is fixed to the pre-drilled mounting holes in the composite panels with bolts. Figure 6 As shown; the reinforcing central crossbar 13 is snapped together with the locking frame 14 to form a connecting frame. A docking plate 15 is welded to the outside of the connecting frame. The energy-absorbing bag 16 is attached to the docking plate 15. The extension plate 17 is fitted onto the outside of the energy-absorbing bag 16. The traction rod 18 passes through the first pad 3, the extension plate 17, the docking plate 15, and the second pad 4 in sequence, and is locked with a lock nut. Figure 3 As shown; Several first extended support rods 19 are hinged to the outside of the first pad 3, and several second extended support rods 20 are hinged to the outside of the second pad 4. Adjacent first extended support rods 19 and second extended support rods 20 are connected by hinge plates 21. Inclined extension rods 22 are hinged between each hinge plate 21 to form a triangular stable support structure. Figure 7 As shown; Based on the required dimensions of the laboratory foundation, each locking bracket 14 is connected to the corresponding first foundation 1 and second foundation 2 along the hexagonal edges to form an integrated foundation system, such as... Figure 8 As shown, the joints are filled with low-temperature resistant sealant, or the foundations are spliced ​​together by steel wire ropes or additional hinge seats, so that the individual first foundation 1 and second foundation 2 can be adjusted in height and angle to adapt to the possible misalignment caused by uneven settlement on the ice surface. The specific working principle is as follows: when it is necessary to adapt to different ice thicknesses or adjust the foundation level, the motor 11 on the limit frame 5 is activated. Figure 5As shown, the output shaft of motor 11 drives the first hinge rod 6 to deflect around the hinge point of the limiting frame 5, which in turn drives the second hinge rod 7 to deflect synchronously, causing the limiting sleeve 8 and the top rod 9 fixed on the second hinge rod 7 to change their angles. As the deflection angle increases, the sliding balls 10 on the two adjacent limiting frames 5 abut against each other and generate an upward pushing force, pushing the first pad 3 to rise in the vertical direction, thereby causing the second base 2 to slide relative to the first base 1, achieving a certain range of height fine adjustment.

[0022] When encountering crustal vibrations or ice layer movement, the amplitude of the vibration is first transmitted to the second foundation 2, and then transmitted through the connecting frame to the energy-absorbing bag 16 on the docking plate 15. Figure 6 As shown, the polyisobutylene elastomer inside the energy-absorbing bag 16 undergoes elastic deformation to absorb vibration energy; at the same time, the traction rod 18 rigidly connects the first pad 3, the second pad 4 and the extension plate 17, restricting the lateral displacement of each component, ensuring the stability of the opposing displacement, further reducing the residual amplitude, and effectively protecting the upper building structure.

[0023] The buffer 12 in the first pad 3 and the second pad 4 is as follows Figure 6 The composite plate is in a pre-compressed state, which keeps it elastically supported. When the superstructure generates instantaneous loads, the buffer 12 disperses stress through elastic deformation, preventing localized stress concentration and cracking of the composite plate. The basalt fiber and nano-zirconia incorporated into the composite plate significantly improve tensile strength and crack resistance. Combined with the restraining effect of low-temperature resistant steel, it can still maintain good mechanical properties in an environment of -45℃, meeting the long-term use requirements of polar engineering.

[0024] The triangular support structure formed by the first extension support rod 19, the second extension support rod 20, and the inclined extension rod 22 is as follows: Figure 7 As shown, extending the support range of the foundation outwards ensures the stability of the contact between the foundation and the ice surface, reduces local pressure, and prevents the ice layer from cracking under pressure; the hexagonal structure design of the first foundation 1 and the second foundation 2 is as follows. Figure 8 As shown, the quick-connection between the locking frame 14 and the reinforcing central crossbar 13 can achieve on-site welding-free splicing, which greatly improves the construction efficiency in harsh polar environments.

[0025] It should be noted that the above content merely illustrates the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. For those skilled in the art, various improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A reinforced and toughened ice material composite foundation for polar engineering, comprising a first foundation (1) and a second foundation (2), characterized in that: The second foundation (2) is placed on top of the first foundation (1), and a support assembly is provided between the first foundation (1) and the second foundation (2); The support assembly includes a first pad (3) disposed in the middle of the second foundation (2), and a second pad (4) disposed in the middle of the first foundation (1). The first pad (3) and the second pad (4) are stacked together. A plurality of limiting frames (5) are respectively provided at the bottom of the first pad (3) and the top of the second pad (4), and a first hinge rod (6) is respectively hinged on each of the limiting frames (5). A second hinge rod (7) is hinged on the first hinge rod (6). One side of the second hinge rod (7) extends to the limiting frame (5) and is hinged to the limiting frame (5). A limiting sleeve (8) is fixedly provided in the middle of the second hinge rod (7). A top rod (9) is embedded in the middle of the limiting sleeve (8). A slider (10) is provided at the end of the top rod (9). The sliders (10) on the two stacked limiting frames (5) are in contact with each other, so that when the first hinge rod (6) and the second hinge rod (7) deflect, the adjacent sliders (10) abut together to lift the first pad (3) and adjust the height of the second base (2). A connecting frame is provided between the second foundation (2) and the first pad (3). Several docking plates (15) are provided on the outside of the connecting frame, and several energy-absorbing bags (16) are provided on each docking plate (15). The energy-absorbing bags (16) are used to absorb the amplitude generated by the crustal movement.

2. The reinforced and toughened ice material composite foundation for polar engineering according to claim 1, characterized in that: The connecting frame includes several reinforcing central crossbars (13) and locking brackets (14), and the locking brackets (14) are sleeved on the end of the reinforcing central crossbars (13) and engaged with the reinforcing central crossbars (13).

3. The reinforced and toughened ice material composite foundation for polar engineering according to claim 2, characterized in that: A motor (11) is provided on one side of the limiting frame (5). The output end of the motor (11) passes through the limiting frame (5) and extends to one end of the first hinge rod (6). The first hinge rod (6) is driven to deflect by the motor (11), which in turn causes the second hinge rod (7) and the limiting sleeve (8) to deflect, thereby driving the top rod (9) and the slider (10) to adjust their angles, so that the two adjacent top rods (9) can change from the angled state to the vertical state.

4. A reinforced and toughened ice material composite foundation for polar engineering according to claim 3, characterized in that: An extension plate (17) is fitted onto the energy-absorbing bladder (16). A traction rod (18) is provided at the top and bottom of the extension plate (17), and each traction rod (18) extends to the first pad (3) and the second pad (4). The traction rod (18) is used to connect the first pad (3), the second pad (4), the extension plate (17), the energy-absorbing bladder (16), the docking plate (15), and the connecting frame together.

5. A reinforced and toughened ice material composite foundation for polar engineering according to claim 4, characterized in that: The outer side of the first pad (3) is hinged with several first extension rods (19), and the outer side of the second pad (4) is hinged with several second extension rods (20).

6. A reinforced and toughened ice material composite foundation for polar engineering according to claim 5, characterized in that: One end of each of the first extension rods (19) and the second extension rod (20) is hinged to a hinge plate (21), and each pair of adjacent hinge plates (21) is hinged to a diagonal extension rod (22).

7. A reinforced and toughened ice material composite foundation for polar engineering according to claim 6, characterized in that: The first pad (3) and the second pad (4) each include a plurality of composite plates, and a plurality of buffers (12) are provided between two adjacent composite plates.

8. A reinforced and toughened ice material composite foundation for polar engineering according to claim 7, characterized in that: The cross-sections of the second foundation (2) and the first foundation (1) are both set as polygons, and the second foundation (2) covers the first foundation (1) and is slidably connected to the first foundation (1).

9. A method of using a foundation, employing the reinforced and toughened ice material composite foundation for polar engineering as described in claim 8, characterized in that: Specifically, the following steps are included: Step 1: Start the motor (11) on the limit frame (5). The output shaft of the motor (11) drives the first hinge rod (6) to deflect around the hinge point of the limit frame (5), which in turn drives the second hinge rod (7) to deflect synchronously, so that the limit sleeve (8) and the top rod (9) fixed on the second hinge rod (7) change the angle. As the deflection angle increases, the sliders (10) on the two adjacent limit frames (5) abut against each other and generate an upward pushing force, pushing the first pad (3) to rise in the vertical direction, thereby driving the second base (2) to slide relative to the first base (1) to achieve a certain range of height fine adjustment. Step 2: The vibration amplitude is first transmitted to the second foundation (2), and then transmitted to the energy-absorbing bag (16) on the docking plate (15) through the connecting frame. The polyisobutylene elastomer inside the energy-absorbing bag (16) undergoes elastic deformation to absorb the vibration energy. At the same time, the traction rod (18) rigidly connects the first pad (3), the second pad (4) and the extension plate (17) to limit the lateral displacement of each component, ensure the stability of the opposing displacement, further reduce the residual amplitude, and protect the upper building structure. Step 3: The buffers (12) in the first pad (3) and the second pad (4) are in a pre-compressed state, so that the composite plate always maintains elastic support. When the upper structure generates instantaneous load, the buffer (12) disperses the stress through elastic deformation, avoiding local stress concentration and cracking of the composite plate. Step four: The triangular support structure formed by the first extended support rod (19), the second extended support rod (20) and the inclined extension rod (22) extends the support range of the foundation outward, increases the contact area, and ensures stability. The regular hexagonal structure design of the first foundation (1) and the second foundation (2), together with the quick snap-fit ​​of the locking frame (14) and the reinforcing central crossbar (13) inside, can realize on-site welding-free splicing, which greatly improves the construction efficiency in the harsh polar environment.

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