Heat conduction device, and foundation structure and construction method therefor

Abstract

The present disclosure provides a heat conduction device, and a foundation structure and a construction method therefor. The foundation structure comprises a foundation at least partially buried below the ground and one or more heat conduction devices; the foundation comprises a prefabricated concrete foundation and a supporting structure; the concrete foundation is arranged on a thermal insulating layer; the supporting structure is arranged above the concrete foundation and connected to the concrete foundation; the heat conduction device comprises a heat dissipation unit and a heat collection unit; the heat dissipation unit is arranged above the ground; the heat collection unit is buried below the ground; the heat collection unit is in thermal communication with the heat dissipation unit; by means of the heat dissipation unit, the heat collection unit transmits to an overground environment heat of an underground area where the foundation is located. According to the foundation structure, the exposure time of the foundation pit can be effectively shortened, the heat dissipation capacity of the foundation is reduced, and the refreezing rate of the foundation is increased, thereby improving the loading capacity and stability of an enlarged foundation.

Description

Heat conducting device, foundation structure and construction method thereof Technical Field

[0001] The present disclosure relates to the technical field of construction engineering, and in particular to a heat conducting device, a foundation structure and a construction method thereof. Background Art

[0002] my country has widespread permafrost distribution, with seasonally frozen soil accounting for approximately 53.5% of its land area and permafrost covering approximately 21.5%, making it the third largest country in the world in terms of permafrost. Permafrost is extremely sensitive to temperature, and buildings in permafrost areas suffer primarily from frost heave and thaw settlement. In winter, the volume of permafrost increases, squeezing building foundations and causing them to rise. In summer, the volume of permafrost decreases as it thaws, causing foundations to sink. Therefore, there is an urgent need for a technology that can transfer heat from permafrost, thereby lowering soil temperatures and protecting buildings. Summary of the Invention

[0003] In order to solve at least one of the above technical problems, the present disclosure provides a heat conducting device, a foundation structure and a construction method thereof.

[0004] In a first aspect of the present disclosure, a heat conduction device for a foundation is proposed, the heat conduction device comprising: a heat dissipation unit arranged above the ground; and a heat collection unit buried below the ground, the heat collection unit and the heat dissipation unit being thermally connected, the heat collection unit being located outside the foundation so as to transfer heat from the underground area where the foundation is located to the above-ground environment through the heat dissipation unit, wherein the underground area includes at least a portion of the area below the foundation; at least one bend is formed in all structures through which the heat conduction path from the heat dissipation unit to the heat collection unit passes, the at least one bend comprising a first bend, the first bend being arranged on the heat collection unit, the heat dissipation unit being located outside the first bend, the first bend forming a deflection of the heat conduction device so that the heat collection unit is close to the bottom of the foundation.

[0005] According to one embodiment of the present disclosure, the heat collection unit and the heat dissipation unit are both tubular.

[0006] According to one embodiment of the present disclosure, the installation angle of the heat dissipation unit matches the angle of the foundation pit slope formed when the foundation pit is excavated.

[0007] According to one embodiment of the present disclosure, the heat extraction unit includes a first heat extraction section and a second heat extraction section, the first heat extraction section and the second heat extraction section are connected, the first heat extraction section is located at the bottom of the foundation and is horizontally arranged, the second heat extraction section is located beside the foundation and is connected to the heat dissipation unit, and the length of the first heat extraction section is not less than the length of the bottom of the foundation in the axial direction of the first heat extraction section.

[0008] According to one embodiment of the present disclosure, a bend is formed in all structures along the heat conduction path from the heat dissipation unit to the heat collection unit, and the bend is the first bend.

[0009] According to one embodiment of the present disclosure, the heat conduction device includes two heat dissipation units, the two heat dissipation units are thermally connected to two sides of the heat collection unit respectively, and the heat collection unit is provided with two first bends.

[0010] According to one embodiment of the present disclosure, the heat conducting device is a passive heat conducting device.

[0011] According to one embodiment of the present disclosure, the heat conducting device is provided with a closed hollow structure, the heat collection unit and the heat dissipation unit are connected through the hollow structure, a working fluid is provided in the hollow structure, and the heat conducting device uses the working fluid to perform phase change latent heat to transfer the heat collected by the heat collection unit to the ground environment through the heat dissipation unit.

[0012] A second aspect of the present disclosure proposes a foundation structure with a heat-conducting function, characterized in that the foundation structure includes: a foundation at least partially buried underground; and one or more heat-conducting devices, wherein the heat-conducting device is a heat-conducting device for the foundation as described in any of the above embodiments.

[0013] According to one embodiment of the present disclosure, the foundation structure includes a plurality of the heat-conducting devices, and each of the heat-conducting devices is arranged in a horizontal direction.

[0014] According to one embodiment of the present disclosure, the foundation structure further includes: a heat insulation layer, which is arranged between the foundation and the heat extraction unit of the heat conduction device.

[0015] According to one embodiment of the present disclosure, the foundation includes: an assembled concrete foundation, which is arranged on the insulation layer; and a supporting structure, which is arranged above the concrete foundation and connected to the concrete foundation.

[0016] According to one embodiment of the present disclosure, the supporting structure is connected to the concrete foundation via tie rods.

[0017] According to one embodiment of the present disclosure, the concrete foundation includes: an assembled upper foundation, which is arranged at the bottom of the supporting structure; and an assembled lower foundation, which is arranged at the bottom of the upper foundation and connected to the upper foundation.

[0018] According to one embodiment of the present disclosure, the lower foundation is connected to the upper foundation via a tie rod.

[0019] According to one embodiment of the present disclosure, the lower foundation includes a plurality of concrete blocks, and the concrete blocks are connected by steel strands.

[0020] According to one embodiment of the present disclosure, a tongue and groove is provided at the joint of each concrete block, and the tongue and groove is used for pouring cement slurry so that the multiple concrete blocks form the lower foundation.

[0021] A third aspect of the present disclosure provides a construction method for a foundation structure, which is applied to the foundation structure described in any of the above-mentioned embodiments. The construction method includes: excavating a foundation pit; opening an installation groove for the heat-conducting device during the excavation of the foundation pit and installing the heat-conducting device; and starting to install other parts of the foundation structure after completing the excavation of the foundation pit and installing all the heat-conducting devices, so that the heat-conducting device can start conducting heat during the installation of the other parts.

[0022] According to one embodiment of the present disclosure, the foundation pit is excavated in a zoned manner, and the installation groove for the heat conducting device is opened and the heat conducting device is installed immediately after the excavation of each zone is completed.

[0023] According to one embodiment of the present disclosure, the heat extraction unit of the heat conducting device includes a first heat extraction section, which is located at the bottom of the other parts of the foundation structure and is arranged horizontally. There is a certain distance between the installation groove of the first heat extraction section and the base of the foundation pit in the vertical direction.

[0024] According to one embodiment of the present disclosure, the other parts of the foundation structure include a thermal insulation layer and a foundation base, and installing the other parts of the foundation structure includes: installing the thermal insulation layer; and starting to install the foundation base after the thermal insulation layer is installed.

[0025] According to one embodiment of the present disclosure, the foundation includes an assembled concrete foundation and a supporting structure, the concrete foundation includes an assembled upper foundation and an assembled lower foundation, and installing the foundation includes: installing the lower foundation on the insulation layer; installing the upper foundation on the lower foundation; and installing the supporting structure on the upper foundation.

[0026] According to one embodiment of the present disclosure, the lower foundation includes a plurality of concrete blocks, and installing the lower foundation on the insulation layer includes: placing a plurality of concrete blocks on the insulation layer, and installing the plurality of concrete blocks together to form a lower foundation of the foundation.

[0027] According to one embodiment of the present disclosure, installing the plurality of concrete blocks together to form a lower foundation comprises: pouring cement slurry through the tongue and groove provided at the joints of the concrete blocks, so that the plurality of concrete blocks form the lower foundation.

[0028] According to one embodiment of the present disclosure, before excavating the foundation pit, the construction method further includes: prefabricating each of the concrete blocks and the upper foundation at a location outside the foundation pit, and dissipating heat from each of the concrete blocks and the upper foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic diagram of a three-dimensional structure of a heat conduction device for a foundation according to one embodiment of the present disclosure.

[0030] FIG2 is a schematic diagram of a three-dimensional structure of a heat conduction device for a foundation according to another embodiment of the present disclosure.

[0031] FIG3 is a schematic diagram of a three-dimensional structure of a heat conduction device for a foundation according to another embodiment of the present disclosure.

[0032] FIG4 is a schematic diagram of a three-dimensional structure of a foundation structure with a heat conduction function according to an embodiment of the present disclosure.

[0033] FIG5 is a schematic right side view of a foundation structure with a heat conduction function according to another embodiment of the present disclosure.

[0034] FIG6 is a schematic top view of the foundation structure with heat conduction function shown in FIG5 .

[0035] FIG7 is a schematic flow chart of a construction method of a foundation structure according to an embodiment of the present disclosure.

[0036] FIG8 is a schematic flow chart of a construction method of a foundation structure according to another embodiment of the present disclosure.

[0037] FIG9 is a schematic flow chart of a construction method of a foundation structure according to yet another embodiment of the present disclosure.

[0038] FIG10 is a schematic flow chart of a construction method of a foundation structure according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the relevant content and are not intended to limit the present disclosure. It should also be noted that, for ease of description, only the portions relevant to the present disclosure are shown in the accompanying drawings.

[0040] Due to the unique climate and environment of permafrost regions, buildings constructed there are subject to frost heave and thaw subsidence. The Qinghai-Tibet Plateau, located at high altitude, is home to vast expanses of permafrost. With the further development of western China, more construction, bridge, and power projects are being deployed on the plateau. The disturbance of permafrost during foundation construction, coupled with the resulting damage caused by elevated foundation temperatures, poses a significant challenge to structures like houses, bridges, and power towers.

[0041] The following describes the heat conducting device, foundation structure and construction method of the present invention by taking the construction of a bridge foundation in a permafrost region as an example with reference to the accompanying drawings.

[0042] Figure 1 is a schematic three-dimensional diagram of a heat transfer device for a foundation according to one embodiment of the present disclosure. Referring to Figure 1 , the heat transfer device for a foundation according to this embodiment includes a heat dissipation unit 11 and a heat extraction unit 12. The heat dissipation unit 11 is located above ground level 90°, while the heat extraction unit 12 is buried below ground level 90°. The heat extraction unit 12 is thermally connected to the heat dissipation unit 11. The heat extraction unit 12 is located outside the foundation 30 to transfer heat from the underground area where the foundation 30 is located to the aboveground environment via the heat dissipation unit 11. The underground area includes at least a portion of the area below the foundation 30. The heat transfer path from the heat dissipation unit 11 to the heat extraction unit 12 includes at least one bend in all structures along the path. This at least one bend includes a first bend 21. The first bend 21 is located above the heat extraction unit 12, with the heat dissipation unit 11 located outside the first bend 21. The first bend 21 deflects the heat transfer device, bringing the heat extraction unit 12 closer to the bottom of the foundation 30.

[0043] According to the heat conduction device for foundation proposed in the embodiment of the present invention, heat is dissipated in the area near the foundation of the building, especially in the underground area near the bottom of the foundation in the permafrost area. The heat in the bottom area of ​​the foundation is collected by the heat collection unit and the heat is transferred to the ground through the heat dissipation unit. The temperature of the permafrost soil body can be reduced, and the permafrost can be kept in a stable frozen state as much as possible, thereby reducing the degree of temperature change of the permafrost due to climate and environmental changes, thereby reducing the degree of frost heave and thaw subsidence of the permafrost, and preventing the permafrost from becoming soft, melting, and sinking, thereby effectively protecting structural buildings such as bridge foundations in permafrost areas.

[0044] The foundation 30 refers to the underground extension of a building's walls or columns, which are based on the foundation. For building construction in permafrost regions, a suitable foundation structure is essential. For example, an extended foundation (shallow foundation) can be used as the foundation for buildings in permafrost regions. Specifically, the foundation 30 can be an extended foundation. This extended foundation distributes the wall or column load across the foundation's bottom surface, meeting the foundation's bearing capacity and deformation requirements. It also offers advantages such as simple construction methods and equipment, the availability of locally available materials, and economical efficiency.

[0045] The ground 90 in FIG1 shows a ground state after the entire heat conducting device and the foundation 30 are installed and the foundation pit is backfilled. The ground 90 is mainly used to distinguish the above-ground part and the underground part of the heat conducting device and the foundation 30 .

[0046] The heat conducting device is used to transfer the heat existing in the frozen soil area near the foundation 30 below the ground 90 to a place far away from the foundation 30, such as releasing the heat into the atmosphere. The heat collection unit 12 is responsible for collecting the heat, and the heat dissipation unit 11 is responsible for dissipating the heat. "Thermal connectivity" means that the heat collection unit 12 and the heat dissipation unit 11 may or may not be in physical contact with each other or adjacent to each other, but can exchange heat with each other, and the heat collection unit 12 can transfer heat to the heat dissipation unit 11. The heat dissipation unit 11 is exposed above the ground 90 and is arranged on the side of the foundation 30. The heat collection unit 12 can absorb heat from the bottom and side of the foundation 30 to a specific area around the foundation 30, such as absorbing heat from a part of the area within a certain depth directly below the foundation 30.

[0047] It is understood that the coverage of the heat extraction area (i.e., the heat absorption area) can be expanded by changing the performance parameters and dimensions of the heat conduction device, so that the heat extraction area can cover the entire area within a certain depth below the foundation. It should be noted that part or all of the area within this certain depth can be adjacent to the bottom of the foundation 30, that is, the area is immediately adjacent to the bottom of the foundation 30, so as to directly maintain the frozen state of the frozen ground area at the bottom of the foundation 30.

[0048] The heat transfer path is the heat transfer path. The heat collection unit 12 and the heat dissipation unit 11 can be physically connected and directly connected. In this case, the heat transfer path is heat collection unit 12 -> heat dissipation unit 11. In the heat conduction device shown in Figure 1, the heat collection unit 12 and the heat dissipation unit 11 are directly connected.

[0049] The heat conduction device is provided with a turning point for the heat conduction path, namely, a first bend 21. The heat conduction path undergoes a change in direction due to at least the first bend 21. The length direction of the heat dissipation unit 11 differs from the length direction of the heat collection unit 12 due to the first bend 21. For example, the length direction of the heat dissipation unit 11 can be vertically downward, or it can be inclined downward and inclined toward the bottom of the foundation 30 (as shown in Figure 1). Compared to setting the extension direction of the heat collection unit 12 as the length direction of the heat dissipation unit 11, the first bend 21 allows the heat collection unit 12 to be closer to the bottom of the foundation 30. For example, the length direction of part of the heat collection unit 12 is parallel to the bottom plane of the foundation 30, thereby bringing the cooled area closer to the bottom of the foundation 30. Furthermore, the first bend 21 also reduces the distance between the heat dissipation unit 11 and the bottom of the foundation 30, reducing the length of the heat conduction device, which is beneficial for improving heat transfer efficiency and controlling costs.

[0050] It can be understood that multiple bends can be set in all the structures through which the above-mentioned heat conduction path passes, and multiple turns can be made through multiple bends, so that the heat extraction unit 12 can be closer to the bottom of the foundation 30 and more closely fit the side and bottom shape of the foundation 30.

[0051] For example, both the heat extraction unit 12 and the heat dissipation unit 11 can be tubular, such as a round tube. Heat dissipation fins (not shown in FIG. 1 ) can extend outward from the outer tube wall of the heat dissipation unit 11 to increase the contact area with the air, thereby improving heat dissipation efficiency. The heat dissipation fins can be ribs or spiral fins.

[0052] For example, the installation angle of the heat dissipation unit 11 can match the angle of the foundation pit slope formed during excavation. The foundation pit slope (not shown in Figure 1) refers to the slope of the foundation pit sidewall with a certain inclination, which is formed when the foundation pit excavation is completed. The heat dissipation unit 11 can be arranged to tilt downward, so that one end of the heat dissipation unit 11 faces the bottom of the foundation base 30. The tilt angle can be the same as the angle of the foundation pit slope, that is, the same slope. This can facilitate the installation and construction of the heat dissipation unit 11 and improve the heat dissipation effect.

[0053] FIG2 is a schematic diagram of the three-dimensional structure of a heat-conducting device for a foundation according to another embodiment of the present disclosure. Referring to FIG2 , the heat extraction unit 12 may include a first heat extraction section and a second heat extraction section. The first heat extraction section and the second heat extraction section are connected, the first heat extraction section may be located at the bottom of the foundation 30 and may be arranged horizontally, and the second heat extraction section may be located beside the foundation 30 and connected to the heat dissipation unit 11. The length of the first heat extraction section may not be less than the length of the bottom of the foundation 30 in the axial direction of the first heat extraction section. By setting the first heat extraction section horizontally and reasonably setting the length of the first heat extraction section, the heat extraction area of ​​the first heat extraction section can be more closely fitted to the bottom surface of the foundation, thereby improving the heat conduction effect.

[0054] The first heat extraction section and the second heat extraction section together form a heat extraction unit 12. One end of the first heat extraction section can be a closed end, and the other end is connected to the second heat extraction section. The connection between the first heat extraction section and the second heat extraction section is the first bend 21. One end of the second heat extraction section is connected to the first heat extraction section, and the other end is connected to the heat dissipation unit 11. The horizontal portion of the heat extraction unit 12 shown in FIG2 is the first heat extraction section, the inclined portion below the ground is the second heat extraction section, and the inclined portion above the ground is the heat dissipation unit 11. Both the first heat extraction section and the second heat extraction section can transfer heat from the underground near the foundation to the heat dissipation unit 11. The two can be similar or identical in structure, and the difference between the two can only be the different positions in the heat conduction device.

[0055] The bottom structure of the foundation 30 can be horizontally arranged, with a rectangular bottom surface. The first heat extraction section can be arranged so that the axial direction (X) of the first heat extraction section is parallel to the rectangular bottom surface of the foundation 30. By combining the length and horizontal arrangement of the first heat extraction section, the heat extraction area of ​​the first heat extraction section can cover the bottom surface of the foundation 30 within a certain width along the axial direction (X) of the first heat extraction section.

[0056] 1 and 2 , the heat conduction path from the heat dissipating unit 11 to the heat collecting unit 12 may have only one bend formed in all the structures, and this bend is the first bend 21. In this case, the heat conducting device is generally L-shaped.

[0057] Figure 3 is a schematic three-dimensional diagram of a heat transfer device for a foundation according to another embodiment of the present disclosure. Referring to Figure 3, the heat transfer device may include two heat dissipation units 11, each thermally connected to a heat extraction unit 12 on either side. Heat extraction unit 12 is provided with two first bends 21. The provision of two heat dissipation units increases the contact channel and contact area with the atmosphere, thereby improving heat exchange efficiency and reducing the time it takes for frozen soil in the foundation to thaw.

[0058] The heat-conducting device may include two heat-dissipating units 11 and a heat-collecting unit 12. The heat-collecting unit 12 has two first bends 21 on its structure, located at either end of a first heat-collecting section. The heat-collecting unit 12 is provided with two second heat-collecting sections, each connected to the opposite ends of the first heat-collecting section, giving the heat-collecting unit 12 a roughly U-shaped shape. One end of each heat-dissipating unit 11 is connected to a corresponding second heat-collecting section, while the other end of each heat-dissipating unit 11 is a closed end, representing the end of the entire heat-conducting device. The heat-conducting device now has two ends. Two heat-conducting paths exist in the heat-conducting device, each of which follows the same path: heat-collecting unit 12 → heat-dissipating unit 11.

[0059] For example, the heat conducting device may be a passive heat conducting device, which refers to a heat conducting device that does not rely on external energy (such as power) to achieve heat transfer.

[0060] For example, the heat transfer device can be configured as a sealed hollow structure. Heat collection unit 12 and heat dissipation unit 11 can be connected via the hollow structure. A working fluid can be disposed within the hollow structure, and the heat transfer device utilizes the working fluid to generate latent heat to transfer heat collected by heat collection unit 12 to the aboveground environment via heat dissipation unit 11.

[0061] Take a tubular heat-conducting device as an example. The heat-conducting device is an integral tubular structure with a cavity inside, which connects the heat collection unit 12 and the heat dissipation unit 11. The heat-conducting device can be, for example, a hollow steel pipe, and the diameter of the hollow steel pipe can be set to be no less than 8 cm. When the structure of the heat-conducting device only includes a first heat collection section, a second heat collection section, and a heat dissipation unit, the first heat collection section, the second heat collection section, and the heat dissipation unit together constitute the heat-conducting device. The heat-conducting device is an integral structure, and the three components are respectively one part of the integral structure. The first heat collection section and the heat dissipation unit each have a closed end and a connecting end, and the second heat collection unit does not have a closed end but has two connecting ends.

[0062] The cavity of the heat transfer device is filled with a liquefied working fluid with a low boiling point, such as liquid ammonia, which allows the fluid to undergo phase changes even at relatively low temperatures. The heat transfer device utilizes the principle that the working fluid undergoes phase changes when the external temperature changes, absorbing and releasing heat. When the temperature changes and the degree of change meets the phase change conditions of the working fluid, the working fluid changes from one phase to another, absorbing and releasing heat during the phase change, thereby achieving heat transfer.

[0063] Continuing with Figure 3, the heat conduction device is a closed heat conduction pipe with a vacuum cavity inside. Heat extraction unit 12 is the evaporation section of the heat conduction pipe. The evaporation section includes a straight section and an inclined section. The straight section is the first heat extraction section, and the inclined section is the second heat extraction section. A first bend 21 is defined between the straight and inclined sections. The straight section is buried underground below foundation 30, while the inclined section is buried underground beside foundation 30. Heat dissipation unit 11 is the condensation section of the heat conduction pipe and is exposed to the atmosphere above ground level. The working fluid can utilize the space within the cavity to move between the evaporation and condensation sections.

[0064] When the ambient temperature is low, such as in winter, there's a temperature difference between the atmosphere and the permafrost, with the atmospheric temperature lower than the permafrost temperature. The liquid working fluid absorbs the heat from the permafrost, vaporizing and evaporating in the evaporation section. The vaporized working fluid then moves upward within the cavity to the condensation section. Because the condensation section is exposed to the cooler atmosphere, the working fluid returns to liquid form, releasing the absorbed heat into the atmosphere through the condensation section's pipes. After cooling, the liquid working fluid flows back to the evaporation section below under the influence of gravity, where it continues to absorb heat from the permafrost, completing the process of transferring heat from the permafrost to the atmosphere. This achieves both heat exchange and cooling of the permafrost, lowering the soil temperature and improving the stability of the permafrost foundation.

[0065] When the atmospheric temperature is high, such as in summer, the liquid working fluid is completely vaporized, and the gas convection is very small, so it is difficult for the heat in the atmosphere to be transferred to the permafrost through the working fluid, keeping the permafrost in a stable frozen state.

[0066] It can be understood that the foundation 30 can be configured with multiple heat-conducting devices, and each heat-conducting device can be arranged in a horizontal direction, for example, in a direction perpendicular to the axis of the heat extraction unit 12, so that the heating areas of all heat-conducting devices cover the entire area below the foundation 30, further improving the foundation stability of the frozen soil.

[0067] Figure 4 is a schematic diagram of a three-dimensional foundation structure with heat conduction functionality according to one embodiment of the present disclosure. Referring to Figure 4 , the foundation structure includes a foundation 30 and one or more heat conduction devices 10. Foundation 30 is at least partially buried underground. Heat conduction devices 10 can be any of the heat conduction devices for foundations described in any of the aforementioned embodiments.

[0068] The heat conducting device 10 may include a heat dissipation unit 11 and a heat collection unit 12. The heat dissipation unit 11 is disposed above ground level 90, while the heat collection unit 12 is buried below ground level 90. The heat collection unit 12 and the heat dissipation unit 11 are thermally connected. The heat collection unit 12 is located outside the foundation 30 to transfer heat from the underground area where the foundation 30 is located to the aboveground environment via the heat dissipation unit 11. The underground area includes at least a portion of the area below the foundation 30. At least one bend is formed in all structures along the heat conduction path from the heat dissipation unit 11 to the heat collection unit 12. The at least one bend includes a first bend 21. The first bend 21 is disposed on the heat collection unit 12, and the heat dissipation unit 11 is located outside the first bend 21. The first bend 21 forms a deflection in the heat conducting device 10, so that the heat collection unit 12 is close to the bottom of the foundation 30.

[0069] It should be noted that the details not disclosed in the foundation structure with heat conduction function provided in this embodiment can refer to the details disclosed in the heat conduction device for the foundation of the above embodiment proposed in this disclosure, and will not be repeated here.

[0070] According to the foundation structure with heat conduction function proposed in the embodiment of the present invention, a heat conduction device is used to dissipate heat near the foundation of the building, especially the area near the bottom of the foundation underground in the permafrost area. The heat of the bottom area of ​​the foundation is collected by the heat collection unit of the heat conduction device and the heat is transferred to the ground through the heat dissipation unit of the heat conduction device. This can reduce the temperature of the permafrost soil, keep the permafrost in a stable frozen state as much as possible, reduce the degree of temperature change of the permafrost due to climate and environmental changes, thereby reducing the degree of frost heave and thaw subsidence of the permafrost, and prevent the permafrost from becoming soft, melting, or sinking, effectively protecting structural buildings such as bridge foundations in permafrost areas.

[0071] For example, the heat extraction unit 12 and the heat dissipation unit 11 may both be tubular, such as a round tube. The installation angle of the heat dissipation unit 11 may match the angle of the foundation pit slope formed during foundation pit excavation.

[0072] For example, the heat extraction unit 12 may include a first heat extraction section and a second heat extraction section. The first heat extraction section and the second heat extraction section are connected. The first heat extraction section may be located at the bottom of the foundation 30 and may be arranged horizontally. The second heat extraction section may be located beside the foundation 30 and may be connected to the heat dissipation unit 11. The length of the first heat extraction section may be no less than the axial length of the bottom of the foundation 30 in the first heat extraction section.

[0073] For example, only one bend may be formed in all the structures along the heat conduction path from the heat dissipating unit 11 to the heat collecting unit 12 , and the bend is the first bend 21 .

[0074] For example, the heat conducting device 10 may include two heat dissipating units 11 , which are respectively thermally connected to two sides of the heat collecting unit 12 . The heat collecting unit 12 is provided with two first bends 21 .

[0075] For example, the heat conducting device 10 can be a passive heat conducting device 10. The heat conducting device 10 can be provided with a sealed hollow structure. The heat collection unit 12 and the heat dissipation unit 11 can be connected through the hollow structure. A working fluid can be disposed within the hollow structure, and the heat conducting device 10 uses the working fluid to generate latent heat to transfer heat collected by the heat collection unit 12 to the aboveground environment through the heat dissipation unit 11.

[0076] Continuing with Figure 4 , the foundation structure can include multiple heat conducting devices 10, each arranged horizontally. For example, Figure 4 shows three heat conducting devices 10, arranged perpendicular to the axis of the heat extraction unit 12. This allows the heat extraction areas of all heat conducting devices 10 to fully cover the area below the foundation 30, further improving the stability of the frozen ground.

[0077] Continuing to refer to Figure 4, the foundation structure may further include an insulation layer 13. The insulation layer 13 may be disposed between the foundation 30 and the heat collection unit 12 of the heat conducting device 10. The insulation layer 13 is an insulation cushion layer, and the insulation layer 13 may be composed of crushed stone or other insulation materials and laid between the frozen soil and the foundation 30. The heat collection unit 12 is located on the outside of the insulation layer 13, for example, on the lower side and at least one side of the insulation layer 13. When the heat collection unit 12 includes a first heat collection section and a second heat collection section, the first heat collection section may be located at the bottom of the insulation layer 13 and arranged horizontally, and a certain distance may be left between the first heat collection section and the insulation layer 13 in the vertical direction.

[0078] The thermal insulation layer 13 effectively prevents the foundation from transferring heat to the frozen soil during building operation. It also protects the foundation from being exposed during excavation, preventing the frozen soil from thawing and maintaining its frozen state. Immediately after excavation, grooves can be cut in the bottom and sides of the pit and the heat transfer device 10 can be installed, followed by the thermal insulation layer 13.

[0079] The bottom surface of the foundation 30 can be a rectangular plane, and the plane can be a horizontal plane. The top of the thermal insulation layer 13 can be adjacent to the bottom of the foundation 30, and the top surface of the thermal insulation layer 13 can completely cover the bottom surface of the foundation 30 to ensure the thermal insulation effect. For example, the top surface of the thermal insulation layer 13 is a rectangular plane, the bottom surface of the foundation 30 is located at the center of the top surface of the thermal insulation layer 13, and the length and width of the top surface of the thermal insulation layer 13 can be respectively greater than the length and width of the bottom surface of the foundation 30. The heat extraction unit 12 is at least partially located at the bottom of the thermal insulation layer 13, and the heat dissipation unit 11 is located above and beside the thermal insulation layer 13.

[0080] When the bottom surface of the insulation layer 13 is a horizontal rectangular surface, since the length and width of the insulation layer 13 are respectively greater than the length and width of the bottom of the foundation 30, the length of the heat extraction unit 12 can be set to be greater than or equal to the length of the opposite sides of the rectangle of the bottom surface of the insulation layer 13, so that the maximum length of the heat extraction area is greater than the length of the bottom of the insulation layer 13, thereby expanding the heat dissipation range, further increasing the heat dissipation effect, and enhancing the stability of the frozen state of the permafrost.

[0081] At present, when constructing the foundation of a foundation structure, due to the large volume of the foundation, the heat released during construction is large, so the construction process will be detrimental to the freezing state of the foundation. Figure 5 is a right-side schematic diagram of a foundation structure with a heat-conducting function according to another embodiment of the present disclosure. Figure 6 is a top-view schematic diagram of the foundation structure with a heat-conducting function shown in Figure 5. Referring to Figures 5 and 6, the foundation may include an assembled concrete foundation 31 and a supporting structure 37. The concrete foundation 31 is arranged on the thermal insulation layer 13. The supporting structure 37 is arranged above the concrete foundation 31 and is connected to the concrete foundation 31.

[0082] The prefabricated concrete foundation can be prefabricated at a prefabrication yard. A prefabrication yard is a location where concrete or various building components are prepared during construction. The supporting structure 37 can be a bridge pier, a concrete structure that supports the main beam of a bridge. The pier can be prefabricated and can be connected to the concrete foundation 31 by on-site splicing at the prefabrication yard.

[0083] By adopting prefabricated concrete foundations, the foundation can be prefabricated in the factory and transported to the foundation pit for on-site assembly after reaching the required strength, thus reducing the exposure time of the foundation pit. In addition, the hydration heat of the foundation is released during prefabrication, effectively reducing the heat dissipation of the foundation.

[0084] The support structure 37 can be connected to the concrete foundation 31 via tie rods 34. Tie rods 34 are rod-shaped components installed on machinery or buildings to provide traction. High-strength tie rods can be used. The assembled concrete foundation 31 and support structure 37 are connected together via tie rods 34 to form a single unit. If the foundation includes an insulation layer 13, the unit is placed above the insulation layer 13. Loads from the support structure 37 and the structure above are transferred to the insulation layer 13 and, in turn, to the frozen soil 92 via the concrete foundation 31.

[0085] The concrete foundation 31 is placed on the insulation layer 13. The first heat extraction section of the heat extraction unit 12 of the heat conducting device 10 is positioned below the insulation layer 13. For example, the first heat extraction section can be located within the frozen soil 92, with a certain distance between it and the insulation layer 13 above. The heat dissipation unit 11 of the heat conducting device 10 can be installed at an angle that matches the angle of the foundation pit slope 91, thereby reducing construction difficulty and maximizing heat dissipation. Multiple heat dissipation fins 14 can be arranged on the heat dissipation unit 11 to improve heat dissipation efficiency.

[0086] Continuing with Figures 5 and 6 , the prefabricated concrete foundation 31 may include a prefabricated upper foundation 32 and a prefabricated lower foundation 33. The upper foundation 32 is disposed at the bottom of the support structure 37. The lower foundation 33 is disposed at the bottom of the upper foundation 32 and connected to the upper foundation 32. The prefabricated precast concrete foundation 31 is divided into two layers: the upper foundation 32 and the lower foundation 33. The lower foundation 33 may be connected to the upper foundation 32 via tie rods 34, forming a single unitary structure via high-strength tie rods.

[0087] A first groove may be provided on the contact surface between the upper foundation 32 and the support structure 37 , and the depth of the first groove may be set to 5 cm. The length and width of the first groove match the size of the bottom of the support structure 37 .

[0088] A second groove may be provided on the contact surface between the lower foundation 33 and the upper foundation 32. The depth of the second groove may be set to 5 cm. The length and width of the second groove match the size of the bottom of the upper foundation 32.

[0089] The upper foundation 32 can be a single precast concrete block, measuring 360 cm x 360 cm x 85 cm and weighing 27.5 tons. The lower foundation 33 can be comprised of multiple concrete blocks, connected by steel strands 35. Each precast concrete block can be completely prefabricated at a prefabrication site and transported to the site for assembly after cooling.

[0090] The lower foundation 33 can be composed of four precast concrete blocks. Each block can measure 280 cm x 280 cm x 100 cm and weigh 20.4 tons. Prestressed pipes can be embedded within each precast concrete block of the lower foundation 33, and high-strength prestressed steel strands 35 can be used to connect them into a single unit for joint load-bearing.

[0091] The joints of the precast concrete blocks of the lower foundation 33 may be provided with a groove 36 for pouring cement slurry so that the concrete blocks form the lower foundation 33. After the construction of each concrete block is completed, the gaps between the blocks are sealed by the groove 36 to prevent moisture from entering, increase durability, and provide shear resistance between the concrete blocks. The size of the groove 36 can be set to be no less than 8 cm. The joints of each precast concrete block can also be provided with a prestressed steel strand tensioning channel, the channel diameter can be 100 mm, and after the steel strand 35 is tensioned, cement slurry is poured through the groove 36 to complete the pouring.

[0092] By adopting prefabricated concrete foundation and dividing the foundation into blocks, precast concrete components are cast in the prefabrication site in advance, and the precast concrete blocks are reserved with joint grooves and prestressed steel tensioning holes. After the concrete components have completed heat dissipation, they are transported to the foundation pit for layer-by-layer installation. The hydration heat of the foundation is released during prefabrication, which effectively reduces the heat dissipation of the foundation, avoids the melting of frozen soil caused by hydration heat during concrete pouring, and minimizes thermal disturbance to the frozen soil. There is no on-site concrete pouring construction in the entire process, which overcomes the problem of difficult concrete pouring in frozen areas in cold seasons, effectively ensures the quality of the foundation project, and thus improves the bearing capacity and stability of the foundation.

[0093] FIG7 is a flow chart of a construction method for a foundation structure according to an embodiment of the present disclosure. Referring to FIG5 , FIG6 and FIG7 , the construction method M10 of this embodiment may include the following steps S1000 , S2000 and S3000 .

[0094] S1000, carry out foundation pit excavation.

[0095] S2000: during the excavation of the foundation pit, a mounting groove for the heat conducting device 10 is opened, and the heat conducting device 10 is installed.

[0096] S3000: After the foundation pit excavation is completed and all the heat conducting devices 10 are installed, other parts of the foundation structure are installed so that the heat conducting devices 10 can start conducting heat during the installation of other parts.

[0097] According to the construction method of the foundation structure proposed in the embodiment of the present invention, the heat conduction device is installed immediately after the excavation of the foundation pit is completed, so that the heat conduction device can start working immediately after the excavation of the foundation pit is completed, and the effective working time runs through the entire process of construction and operation, which can shorten the refreezing time of the foundation construction, increase the foundation refreezing rate, effectively reduce the disturbance of the expanded foundation to the frozen soil, keep the frozen soil in a stable frozen state as much as possible, and effectively protect the bridge foundation and other structural buildings in the frozen soil area.

[0098] The foundation structure of this embodiment includes a foundation 30 and one or more heat transfer devices 10. The foundation 30 is at least partially buried underground. The heat transfer device 10 may include a heat dissipation unit 11 and a heat extraction unit 12. The heat dissipation unit 11 is located above ground, while the heat extraction unit 12 is buried below ground. The heat extraction unit 12 and the heat dissipation unit 11 are thermally connected. The heat extraction unit 12 is located outside the foundation 30 to transfer heat from the underground area where the foundation 30 is located to the aboveground environment through the heat dissipation unit 11. The underground area includes at least a portion of the area below the foundation 30. All structures along the heat transfer path from the heat dissipation unit 11 to the heat extraction unit 12 have at least one bend formed. This at least one bend includes a first bend 21. The first bend 21 is located above the heat extraction unit 12, and the heat dissipation unit 11 is located outside the first bend 21. The first bend 21 deflects the heat transfer device 10, bringing the heat extraction unit 12 closer to the bottom of the foundation 30.

[0099] For example, the heat extraction unit 12 and the heat dissipation unit 11 may both be tubular, such as a round tube. The installation angle of the heat dissipation unit 11 may match the angle of the foundation pit slope formed during foundation pit excavation.

[0100] For example, the heat extraction unit 12 may include a first heat extraction section and a second heat extraction section. The first heat extraction section and the second heat extraction section are connected. The first heat extraction section may be located at the bottom of the foundation 30 and may be arranged horizontally. The second heat extraction section may be located beside the foundation 30 and connected to the heat dissipation unit 11. The length of the first heat extraction section may be no less than the axial length of the bottom of the foundation 30 in the first heat extraction section.

[0101] For example, only one bend may be formed in all the structures along the heat conduction path from the heat dissipating unit 11 to the heat collecting unit 12 , and the bend is the first bend 21 .

[0102] For example, the heat conducting device 10 may include two heat dissipating units 11 , which are respectively thermally connected to two sides of the heat collecting unit 12 . The heat collecting unit 12 is provided with two first bends 21 .

[0103] For example, the heat conducting device 10 can be a passive heat conducting device 10. The heat conducting device 10 can be provided with a sealed hollow structure. The heat collection unit 12 and the heat dissipation unit 11 can be connected through the hollow structure. A working fluid can be disposed within the hollow structure, and the heat conducting device 10 uses the working fluid to generate latent heat to transfer heat collected by the heat collection unit 12 to the aboveground environment through the heat dissipation unit 11.

[0104] Exemplarily, the foundation structure may include a plurality of heat conducting devices 10 , and each heat conducting device 10 is arranged in a horizontal direction.

[0105] It should be noted that the details not disclosed in the heat-conducting device of the foundation structure to be constructed in this embodiment can refer to the details disclosed in the heat-conducting device for the foundation in the above embodiment proposed in this disclosure, and will not be repeated here.

[0106] During excavation, grooves are cut in the bottom and sides of the foundation pit and heat transfer devices 10 are installed. Once installed, heat transfer devices 10 can immediately begin transferring heat from the frozen soil 92 to the atmosphere. During the subsequent installation of other parts of the foundation structure, including the foundation 30, heat generated and input into the frozen soil 92 during the installation process is absorbed and transferred to the atmosphere. The foundation 30 can be an expanded foundation.

[0107] After all parts of the foundation structure are installed, the foundation pit is backfilled to the original ground. The foundation pit backfill can be carried out in layers, and each layer can be compacted once. The thickness of each layer can be set to no more than 50cm, and the compaction degree can be set to no less than 90%.

[0108] For example, before excavating the foundation pit (step S1000), foundation structural parameters can be determined based on the structure of the above-ground building, and excavation can be performed according to the relevant parameters in the foundation structural parameters. Foundation structural parameters may include foundation dimensions, pit size, heat transfer device size, and number of heat transfer devices. Foundation dimensions can be determined based on bearing capacity and frost pull resistance calculations, while heat transfer device size and number can be determined based on frozen soil data, external environment, and foundation size.

[0109] For example, in step S1000, the foundation pit excavation can be carried out in a zoned manner. Upon completion of excavation of each zone, the installation grooves for the heat conducting device 10 can be opened and the heat conducting device 10 installed. For example, if the foundation is equipped with three heat conducting devices 10, the foundation pit can be divided into three sub-zones. Upon completion of excavation of each sub-zone, the installation grooves for that sub-zone can be opened and the heat conducting device 10 installed. This ensures that during the excavation of subsequent sub-zones, the heat conducting devices 10 in the sub-zones that have already been excavated have already begun operation, thereby reducing the heat generated and transferred to the frozen soil during the excavation of subsequent sub-zones, further reducing the disturbance of the frozen soil caused by excavation, shortening the refrost time of foundation construction, and increasing the foundation refrost rate.

[0110] For example, the installation groove of the first heat extraction section of the heat transfer device 10 can be vertically spaced a certain distance from the base of the foundation pit. For example, the installation groove of the first heat extraction section can be located 25 centimeters deep from the base of the foundation pit. This means that the first heat extraction section is buried 25 centimeters deep from the base of the foundation pit, thus preventing damage to the first heat extraction section during subsequent construction of other parts of the foundation structure.

[0111] Figure 8 is a schematic flow chart of a foundation structure construction method according to another embodiment of the present disclosure. Referring to Figures 5, 6, and 8, the remaining components of the foundation structure may include a thermal insulation layer 13 and a foundation base 30. The thermal insulation layer 13 may be positioned between the foundation base 30 and the heat extraction unit 12 of the heat transfer device 10. At this point, installing the remaining components of the foundation structure in step S3000 may include the following steps S3100 and S3200.

[0112] S3100, install the thermal insulation layer 13.

[0113] S3200: After the thermal insulation layer 13 is installed, the foundation 30 is installed.

[0114] According to the construction method of the foundation structure proposed in the embodiment of the present invention, the installation of the thermal insulation layer is started immediately after all the heat-conducting devices are installed. The thermal insulation layer is used to isolate the base from the atmosphere, thereby avoiding the permafrost heating caused by the large heat inflow due to the exposure of the foundation pit to the atmosphere during the construction of the foundation structure. At the same time, it also avoids the heat generated during the subsequent construction of the foundation from being transferred into the permafrost, effectively shortening the exposure time of the foundation pit, further reducing the disturbance of the permafrost by the expansion of the foundation, and keeping the permafrost in a stable frozen state as much as possible.

[0115] During the construction process, the thermal insulation layer 13 and the heat conducting device 10 work together to protect the base from being exposed during foundation excavation, isolate the heat transmitted from the foundation during operation, and ensure the frozen state of the frozen soil to the greatest extent.

[0116] FIG9 is a flow chart of a construction method of a foundation structure according to another embodiment of the present disclosure. Referring to FIG5 , FIG6 and FIG9 , the foundation 30 may include an assembled concrete foundation 31 and a supporting structure 37. The concrete foundation 31 is arranged on the insulation layer 13. The supporting structure 37 is arranged above the concrete foundation 31 and is connected to the concrete foundation 31. The supporting structure 37 may be connected to the concrete foundation 31 via a tie rod 34. The concrete foundation 31 may include an assembled upper foundation 32 and an assembled lower foundation 33. The upper foundation 32 is arranged at the bottom of the supporting structure 37. The lower foundation 33 is arranged at the bottom of the upper foundation 32 and is connected to the upper foundation 32. The lower foundation 33 may be connected to the upper foundation 32 via a tie rod 34. At this time, the method of installing the foundation in step S3200 may include the following steps S3210, S3220 and S3230.

[0117] S3210, installing the lower foundation 33 on the thermal insulation layer 13.

[0118] S3220, install the upper foundation 32 on the lower foundation 33.

[0119] S3230, installing the supporting structure 37 on the upper foundation 32.

[0120] When installing the assembled lower foundation 33, upper foundation 32 and supporting structure 37, they can all be installed by vehicle hoisting. The vehicle hoist has the advantages of convenience, flexibility, high work efficiency and good maneuverability. The lower foundation 33 is hoisted and accurately positioned, and after positioning, it is placed on the insulation layer 13. Then, the upper foundation 32 is hoisted and accurately positioned, and after positioning, it is placed on the lower foundation 33. The upper foundation 32 and the lower foundation 33 are fixed and bolted to the high-strength tie rods 34, and the lower foundation 33 and the upper foundation 32 are connected as a whole to form a structurally stable concrete foundation 31. Then, the supporting structure 37 is hoisted and accurately positioned, and after positioning, it is placed on the upper foundation 32. The supporting structure 37 is fixed to the upper foundation 32 through high-strength tie rods 34, and the concrete foundation 31 and the supporting structure 37 are connected as a whole to form a structurally stable foundation 30. The supporting structure 37 can be a bridge pier. It is understandable that when determining the foundation structural parameters based on the structure of the upper building, the determined foundation structural parameters may also include the number of tie rods.

[0121] For example, the lower foundation 33 may include a plurality of concrete blocks, which may be connected by steel strands 35. At this point, the method of installing the lower foundation of the foundation on the thermal insulation layer in step S3210 may include placing a plurality of concrete blocks on the thermal insulation layer 13 and assembling the concrete blocks together to form the lower foundation 33 of the foundation 30.

[0122] After each concrete block is placed on the insulation layer 13, high-strength prestressed steel strands 35 are bundled and tensioned through prestressed conduits embedded within the concrete blocks. The tensioning control stress can be set to no less than 0.6 times the allowable value. After tensioning is completed, grouting and anchoring can begin. Cement slurry is poured into the tongue-and-groove 36 at the joints (hole grouting), connecting the concrete blocks into a whole to form a structurally stable lower foundation 33. It will be understood that when determining foundation structural parameters based on the structure of the building above, the determined foundation structural parameters may also include the number of steel strands.

[0123] Illustratively, the method of installing the concrete blocks together to form the lower foundation 33 of the foundation 30 in step S3210 may include: pouring cement slurry through the grooves 36 set at the joints of the concrete blocks, so that the multiple concrete blocks form the lower foundation 33.

[0124] Illustratively, before excavating the foundation pit (step S1000 ), the construction method M10 may further include the following steps: prefabricating concrete blocks and the upper foundation 32 at a location outside the foundation pit, and dissipating heat from the concrete blocks and the upper foundation 32 .

[0125] According to the construction method of the foundation structure proposed in the embodiment of the present invention, prefabricated construction is adopted to divide the foundation into blocks, and precast concrete components are cast in advance in the prefabrication site. The precast concrete block components are reserved with joint grooves and prestressed steel bar tensioning holes. After the concrete components have completed heat dissipation, they are transported to the foundation pit for layer-by-layer installation. The construction process is convenient and fast, effectively shortening the construction period. The hydration heat of the foundation is released during prefabrication, which effectively reduces the heat dissipation of the foundation, avoids the melting of frozen soil caused by hydration heat during concrete pouring, and minimizes thermal disturbance to the frozen soil. There is no on-site pouring of concrete in the entire process, which overcomes the problem of difficulty in pouring concrete in frozen areas in cold seasons, effectively ensures the quality of the foundation project, and thus improves the bearing capacity and stability of the foundation.

[0126] The concrete blocks and upper foundation 32 can be produced in a prefabrication yard or factory during prefabrication, and the curing and heat dissipation time can be no less than 60 days. Each prefabricated prefabricated concrete foundation is prefabricated in the prefabrication yard and transported to the site for assembly after the prefabricated concrete foundation has been heat-dissipated.

[0127] FIG10 is a flow chart of a construction method for a foundation structure according to another embodiment of the present disclosure. Referring to FIG10 , the overall construction method of the construction method M20 for a foundation structure includes the following steps.

[0128] S100: Determine foundation structural parameters according to the structure of the upper building.

[0129] S200: Prefabricate concrete blocks and upper foundations at a location outside the foundation pit, and dissipate heat from the concrete blocks and upper foundations.

[0130] S300 uses a zoning excavation method to excavate the foundation pit. After each area is excavated, the installation groove for the heat conduction device is immediately opened and the heat conduction device is installed.

[0131] S400: After the excavation of the foundation pit is completed and all heat conduction devices are installed, the insulation layer will be installed.

[0132] S500: placing the precast concrete blocks on the thermal insulation layer, and installing the precast concrete blocks together through high-strength prestressed steel strands to form a lower foundation of the foundation.

[0133] S600, prefabricated upper foundation (independent component) with foundation installed on the lower foundation via high-strength tie rods.

[0134] S700, prefabricated bridge piers with foundation installed on prefabricated upper foundation through high-strength tie rods.

[0135] S800, foundation pit backfill.

[0136] Any process or method description in the flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

Claims

1. A heat conduction device for foundation, characterized in that: The heat conducting device comprises: A cooling unit installed above ground; and A heat collection unit buried under the ground, the heat collection unit and the heat dissipation unit are thermally connected, the heat collection unit is located outside the foundation, so as to transfer the heat of the underground area where the foundation is located to the ground environment through the heat dissipation unit, wherein the underground area includes at least a part of the area below the foundation; At least one bend is formed in all structures along which the heat conduction path from the heat dissipation unit to the heat collection unit passes, and the at least one bend includes a first bend, which is arranged on the heat collection unit, and the heat dissipation unit is located on the outside of the first bend. The first bend forms a change of direction of the heat conduction device so that the heat collection unit is close to the bottom of the foundation.

2. The heat conducting device according to claim 1, characterized in that: The heat collection unit and the heat dissipation unit are both in tubular shape.

3. The heat conducting device according to claim 1, characterized in that: The installation angle of the heat dissipation unit matches the angle of the foundation pit slope formed when the foundation pit is excavated.

4. The heat conducting device according to claim 1, characterized in that: The heat extraction unit includes a first heat extraction section and a second heat extraction section, the first heat extraction section and the second heat extraction section are connected, the first heat extraction section is located at the bottom of the foundation and is horizontally arranged, the second heat extraction section is located beside the foundation and is connected to the heat dissipation unit, and the length of the first heat extraction section is not less than the length of the bottom of the foundation in the axial direction of the first heat extraction section.

5. The heat conducting device according to claim 1, characterized in that: A bend is formed in all structures along which the heat conduction path from the heat dissipation unit to the heat collection unit passes, and the bend is the first bend.

6. The heat conducting device according to claim 5, characterized in that: The heat conduction device includes two heat dissipation units, which are thermally connected to two sides of the heat collection unit respectively, and the heat collection unit is provided with two first bending parts.

7. The heat conducting device according to claim 6, characterized in that: The heat conducting device is provided with a closed hollow structure, the heat collecting unit and the heat dissipation unit are connected through the hollow structure, a working medium is arranged in the hollow structure, and the heat conducting device uses the working medium to perform phase change latent heat to transfer the heat collected by the heat collecting unit to the ground environment through the heat dissipation unit.

8. A foundation structure with heat conduction function, characterized in that: The foundation structure comprises: Foundations that are at least partially buried underground; and One or more heat-conducting devices, wherein the heat-conducting device is the heat-conducting device for foundation according to claim 1.

9. The foundation structure according to claim 8, characterized in that: The foundation structure includes a plurality of the heat-conducting devices, each of which is arranged in a horizontal direction. The foundation structure also includes a heat-insulating layer, which is arranged between the foundation and the heat-collecting units of the heat-conducting devices.

10. The foundation structure according to claim 9, characterized in that: The foundation comprises: an assembled concrete foundation, the concrete foundation being arranged on the thermal insulation layer; and A supporting structure is disposed above the concrete foundation and connected to the concrete foundation.

11. The foundation structure according to claim 20, characterized in that: The supporting structure is connected to the concrete foundation via tie rods.

12. The foundation structure according to claim 20, characterized in that: The concrete foundation comprises: An assembled upper foundation, the upper foundation being arranged at the bottom of the supporting structure; and An assembled lower foundation is arranged at the bottom of the upper foundation and connected to the upper foundation.

13. The foundation structure according to claim 12, characterized in that: The lower foundation is connected to the upper foundation via a tie rod.

14. The foundation structure according to claim 12, characterized in that: The lower foundation includes a plurality of concrete blocks, and the concrete blocks are connected by steel strands.

15. The foundation structure according to claim 14, characterized in that: A tongue and groove is arranged at the joint of each concrete block, and the tongue and groove is used for pouring cement slurry so that the multiple concrete blocks form the lower foundation.

16. A construction method for a foundation structure, characterized in that: The construction method is applied to the foundation structure described in any one of claims 9 to 17, and the construction method comprises: Carry out foundation pit excavation; During the excavation of the foundation pit, a mounting groove for the heat conducting device is opened, and the heat conducting device is installed; and After the excavation of the foundation pit is completed and all the heat-conducting devices are installed, the other parts of the foundation structure are installed, so that the heat-conducting devices can start to conduct heat during the installation of the other parts.

17. The construction method according to claim 16, characterized in that: The foundation pit is excavated in a partitioned manner, and when the excavation of each area is completed, the installation groove of the heat conduction device is immediately opened and the heat conduction device is installed.

18. The construction method according to claim 16, characterized in that: The heat collection unit of the heat conducting device includes a first heat collection section, which is located at the bottom of the other parts of the foundation structure and is arranged horizontally. There is a certain distance between the installation groove of the first heat collection section and the bottom of the foundation pit in the vertical direction.

19. The construction method according to claim 16, characterized in that: The other parts of the foundation structure include a heat insulation layer and a foundation base, and the other parts of the foundation structure are installed, including: installing the insulation layer; and After the thermal insulation layer is installed, the foundation is installed.

20. The construction method according to claim 9, characterized in that: The foundation comprises an assembled concrete foundation and a supporting structure, the concrete foundation comprises an assembled upper foundation and an assembled lower foundation, and installing the foundation comprises: installing the lower foundation on the thermal insulation layer; installing the upper foundation on the lower foundation; and The support structure is installed on the upper foundation.

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