Permafrost region foundation treatment structure based on egg dragging type UHPC panel and application of permafrost region foundation treatment structure

Abstract

The invention discloses a permafrost region foundation treatment structure based on an egg dragging type UHPC panel and application of the permafrost region foundation treatment structure, and relates to the technical field of permafrost region foundation construction.The permafrost region foundation treatment structure comprises a permafrost region foundation construction area and a permafrost region groove, the permafrost region foundation construction area is located in a permafrost region and is divided into rectangular areas, and the permafrost region groove is formed in the permafrost region; the permafrost region grooves are rectangular, located on the periphery of the permafrost region foundation construction area and expanded on the periphery of the permafrost region foundation at equal intervals, anchor rods are arranged in the permafrost region foundation construction area and evenly distributed in the permafrost region foundation construction area, and the bottoms of all the anchor rods are inserted into the permafrost region. The top of the anchor rod is fixedly provided with a plurality of egg-towed UHPC (Ultra High Performance Concrete) panels formed by pouring, the plurality of egg-towed UHPC panels are stacked in the height direction, reinforcing pieces are filled among the plurality of egg-towed UHPC panels, and the interiors of the frozen soil region grooves are filled with heat preservation pieces; the structure has good foundation stability, has a frost heaving prevention function and is beneficial to long-acting stability of the foundation in the frozen soil area.

Description

Technical Field

[0001] The present invention belongs to the technical field of foundation construction in permafrost areas, and in particular relates to a permafrost area foundation treatment structure based on an egg-drag type UHPC panel and an application thereof. Background Art

[0002] Permafrost refers to soil and rock with negative temperatures and ice. Due to the presence of ice and unfrozen water, its properties are extremely complex and temperature-sensitive. my country's permafrost area accounts for approximately 22.4% of its land area, making it the third largest country in the world in terms of permafrost. In permafrost areas, both construction and global warming can cause permafrost degradation, leading to thaw settlement and serious damage to the stability of projects in permafrost areas.

[0003] UHPC panels, or ultra-high performance concrete panels, are a building material composed of cement, aggregates, high-efficiency water-reducing agents, and other additives. Compared to traditional concrete, UHPC panels exhibit significantly superior properties, including extremely high compressive, tensile, and flexural strength. Their compressive strength can reach over 130 MPa, several times that of ordinary concrete. This allows UHPC panels to withstand greater loads in building structures, improving overall structural stability and safety. UHPC panels also offer excellent durability and corrosion resistance, maintaining their performance and appearance over time and resisting environmental degradation, thereby extending the lifespan of buildings. Furthermore, UHPC panels offer excellent resistance to UV radiation, ensuring stable performance even in outdoor environments. UHPC panels are lightweight and high-strength. Their relatively low density combined with their exceptionally high strength allows them to reduce the weight of buildings while increasing their load-bearing capacity. This characteristic is particularly valuable in applications such as bridges and high-rise buildings. UHPC panels also offer excellent processability. It can be made into components of various shapes and sizes through various processing methods to meet the needs of complex building structures. At the same time, the construction of UHPC panels is also very convenient, which can greatly shorten the construction period.

[0004] After research by the inventors, it was found that the above-mentioned UHPC board concrete structure can be further strengthened with the help of an egg-tray-shaped design. Since the egg-tray-shaped design can provide better support, similar to the support columns in an egg tray, it can effectively disperse and bear the pressure on the foundation, thereby enhancing the stability of the foundation. Based on the special foundation construction method in permafrost areas and combined with the above-mentioned egg-tray-shaped UHPC board, a foundation treatment structure for permafrost areas based on egg-tray-shaped UHPC panels is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a permafrost area foundation treatment structure based on egg-drag type UHPC panels and to apply it to the construction of foundations in permafrost areas. The structure has good foundation stability and anti-frost heave function, which is beneficial to the long-term stability of the foundation in permafrost areas.

[0006] To achieve the above object, the present invention provides the following technical solutions: A permafrost area foundation treatment structure based on egg-drag UHPC panels and its application, the structure comprising a permafrost area foundation construction area and a permafrost area trench, the permafrost area foundation construction area being located in a permafrost area and divided into rectangular areas, the permafrost area trench being rectangular and located outside the permafrost area foundation construction area and extending equidistantly outside the permafrost area foundation, the permafrost area foundation construction area being provided with anchor rods, the anchor rods being uniformly distributed inside the permafrost area foundation construction area, the bottoms of all the anchor rods being plugged into the permafrost area, the tops of the anchor rods being fixed with cast egg-drag UHPC panels, the egg-drag UHPC panels being stacked in a plurality in the height direction, the spaces between the egg-drag UHPC panels being filled with reinforcements, and the permafrost area trench being filled with insulation components.

[0007] As a preferred solution of the present invention, the top of the foundation construction area in the frozen soil zone is drilled and broken to form a sinking trough area, and a conical sinking trough is deeply dug at the bottom of the sinking trough area, and the conical sinking troughs are evenly distributed at the bottom of the sinking trough.

[0008] As a preferred embodiment of the present invention, one side of the egg-shaped UHPC panel is a conical recessed hole area, and a plurality of conical concave holes are provided inside the conical recessed hole area. The conical concave holes are pushed out to form a conical protrusion on the other side of the egg-shaped UHPC panel. The conical protrusion extends into the inside of the conical sinking trough and is cast in contact with the inner wall of the conical sinking trough. The top of the egg-shaped UHPC panel is flush with the surface of the foundation construction area in the frozen soil area.

[0009] As a preferred embodiment of the present invention, the top of the anchor rod exceeds the top of the egg-shaped UHPC panel by 15-20 cm, and the side of the anchor rod is provided with a conical casting body integrally cast with the egg-shaped UHPC panel. The conical casting body surrounds the side of the anchor rod, and the top of the conical casting body is flush with the top of the anchor rod. The anchor rod is arranged at the distance between the two conical recessed hole areas along the egg-shaped UHPC panel.

[0010] As a preferred embodiment of the present invention, all egg-tow type UHPC panels are backfilled with trapezoidal backfill soil on the sides, the trapezoidal backfill soil covers the permafrost area grooves and the side areas of the egg-tow type UHPC panels, and the surface of the trapezoidal backfill soil is compacted.

[0011] As a preferred solution of the present invention, the reinforcement comprises a mineral admixture mixture, the height of the mineral admixture mixture is 10-15 cm, the mineral admixture mixture is a mixture of fly ash and silica fume, and the mass ratio of fly ash to silica fume is 1:2.

[0012] As a preferred solution of the present invention, the insulation component includes a composite concrete slurry cast inside the permafrost zone groove, the composite concrete slurry includes concrete slurry and cotton wool, and also includes a steel plate arranged in contact with the inner wall of the permafrost zone groove.

[0013] As a preferred solution of the present invention, the cotton wool is woven in a mesh shape and is arranged in multiple layers inside the concrete slurry. The distance between two layers of cotton wool is 2-4 cm, and the thickness of the steel plate is 1-2 cm.

[0014] The present invention also provides a foundation treatment structure used in the field of roadbed or foundation construction.

[0015] The application method is as follows: S1. Dig permafrost trenches at intervals of 80-120 cm outside the permafrost foundation construction area, with a depth of 100-150 cm; S2. Select the egg-shaped UHPC panel forming area inside the permafrost foundation construction area, construct a sunken trough area, and construct it 150-180cm away from the above-mentioned permafrost trench area. Use a pile driver to break it to a depth of 40-60cm. S3. Dig a deep conical sinking trough at the bottom of the sinking trough area to clean the broken soil inside the egg-drag UHPC panel forming area; S4. According to the required number of egg-drag UHPC panels, anchor rods of corresponding height are driven into the sinking tank area; S5. Cast egg-shaped UHPC panels with a thickness of 15-20 cm, reserve conical recessed hole areas, and place anchor rods at alternate positions in the conical recessed hole areas; S6. For multi-layer egg-shaped UHPC panels, add a mineral admixture mixture with a height of 10-15 cm 2-3 hours after the egg-shaped UHPC panels are cast, cast the egg-shaped UHPC panels again on the surface, and use a fixed mold to cast a conical casting to cover the anchor rods; S7. Concrete slurry and cotton woven mesh are poured and placed in sequence inside the permafrost trench, and steel plates are installed on the inner wall of the permafrost trench; S8. After the egg-shaped UHPC panels and concrete slurry to be poured have solidified, the surface of the trapezoidal backfill soil is compacted to completely cover the permafrost trench and the permafrost foundation construction area, completing the foundation structure construction.

[0016] In summary, the beneficial technical effects of the present invention are as follows: the foundation structure utilizes the main structure of egg-drag UHPC panels and anchor rods as the foundation reinforcement body, arranges multiple layers of egg-drag UHPC panels, and adopts a mixture of mineral admixtures for reinforcement, thereby improving the stability and strength of the foundation as a whole; at the same time, based on the special situation of the permafrost zone, an insulation structure is arranged, and the insulation parts are used to maintain the internal temperature of the permafrost zone below the foundation, and steel plates are used for reinforcement to avoid ground seepage water directly flowing into the permafrost zone, thereby avoiding frost heave; at the same time, the composite concrete slurry adopts a composite material composed of cotton wool and ordinary concrete, which can reduce the internal porosity of the concrete and reduce heat loss while improving the strength of the concrete, thereby improving the insulation effect, and also has the effect of reducing the entry of water, further reducing the probability of frost heave. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification, but do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic structural diagram of a permafrost area foundation treatment structure based on an egg-towed UHPC panel according to this embodiment; Figure 2 This is a structural schematic diagram of a permafrost area foundation construction area of ​​a permafrost area foundation treatment structure based on an egg-tow type UHPC panel according to this embodiment; Figure 3 This is a permafrost area foundation treatment structure based on egg-type UHPC panels in this embodiment. Figure 2 Schematic diagram of the cross-section structure along the middle line AA; Figure 4 This is a permafrost area foundation treatment structure based on egg-type UHPC panels in this embodiment. Figure 2 Schematic diagram of the cross-section structure at the middle edge BB; Figure 5 This is a flow chart of an application method of a permafrost region foundation treatment structure based on an egg-drag type UHPC panel according to this embodiment.

[0018] Figure 1: 1. Foundation construction area in permafrost zone; 2. Trench in permafrost zone; 3. Anchor rod; 4. Egg-drag type UHPC panel; 5. Sinking trough area; 6. Conical sinking trough; 7. Conical casting body; 8. Cotton woven mesh; 9. Steel plate. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-5 The present invention provides a technical solution: a permafrost area foundation treatment structure based on egg-drag UHPC panels and its application, comprising a permafrost area foundation construction area 1 and a permafrost area trench 2. The permafrost area foundation construction area 1 is located in the permafrost area and is divided into a rectangular area. The permafrost area trench 2 is rectangular and is located outside the permafrost area foundation construction area 1. It is equidistantly extended outside the permafrost area foundation. Anchor rods 3 are provided inside the permafrost area foundation construction area 1. The anchor rods 3 are evenly distributed inside the permafrost area foundation construction area 1. The bottoms of all the anchor rods 3 are plugged into the permafrost area. A cast egg-drag UHPC panel 4 is fixed on the top of the anchor rod 3. Several egg-drag UHPC panels 4 are stacked in the height direction. Reinforcement parts are filled between several egg-drag UHPC panels 4. The permafrost area trench 2 is filled with insulation parts.

[0022] The top of the permafrost area foundation construction area 1 is drilled and broken to form a sinking trough area 5, and the bottom of the sinking trough area 5 is deeply dug with a conical sinking trough 6, and the conical sinking troughs 6 are evenly distributed at the bottom of the sinking trough.

[0023] One side of the egg-shaped UHPC panel 4 is a conical recessed hole area, and a number of conical concave holes are provided inside the conical recessed hole area. The conical concave holes are pushed out to form a conical protrusion on the other side of the egg-shaped UHPC panel 4. The conical protrusion extends to the inside of the conical sinking trough 6 and is cast in fit with the inner wall of the conical sinking trough 6. The top of the egg-shaped UHPC panel 4 is flush with the surface of the foundation construction area 1 in the frozen soil area.

[0024] The top of the anchor rod 3 extends 15-20 cm beyond the top of the egg-shaped UHPC panel 4. A conical casting 7 integrally cast with the egg-shaped UHPC panel 4 is provided on the side of the anchor rod 3. The conical casting 7 surrounds the side of the anchor rod 3. The top of the conical casting 7 is flush with the top of the anchor rod 3. The anchor rod 3 is arranged at the distance between the two conical recessed hole areas along the egg-shaped UHPC panel 4.

[0025] The bottom of the anchor rod 3 penetrates deep into the permafrost zone, and the top extends out to be cast into one with the egg-shaped UHPC panel 4. The egg-shaped UHPC panel 4 provides a better support effect. Combined with the reinforcement effect of the anchor rod 3 in the vertical direction, the overall stability is further improved. At the same time, the casting place of the anchor rod 3 and the egg-shaped UHPC panel 4 is cast into a conical casting body 7, which improves the stability of the anchor rod 3 and the egg-shaped UHPC panel 4.

[0026] All egg-tow type UHPC panels 4 are backfilled with trapezoidal backfill soil on their sides. The trapezoidal backfill soil covers the frozen soil groove 2 and the side areas of the egg-tow type UHPC panels 4. The surface of the trapezoidal backfill soil is compacted.

[0027] Further based on the structure of the conical casting body 7, backfilling earth thereon can fill the gaps formed between the conical casting bodies 7, while raising the foundation height to avoid rainwater accumulation.

[0028] In this embodiment, based on the egg-drag type UHPC panel 4, a multi-layer egg-drag type UHPC panel 4 can be set. The multi-layer egg-drag type UHPC panel 4 can be used to stack the bearing capacity. Different numbers of egg-drag type UHPC panels 4 can be set as needed to further improve the supporting effect. At the same time, reinforcements are further added between the multi-layer egg-drag type UHPC panels 4. Specifically, the reinforcements include a mineral admixture mixture. The height of the mineral admixture mixture is 10-15 cm. The mineral admixture mixture is a mixture of fly ash and silica ash. The mass ratio of fly ash to silica ash is 1:2.

[0029] Fly ash and silica fume can fully react with cement. In this embodiment, after the egg-drag UHPC panel 4 is cast and formed, before it is completely solidified, a mineral admixture of fly ash and silica fume is added. A surrounding template is used on the periphery to evenly place the mineral admixture. Based on the composite reaction between the mineral admixture and cement, the strength of the egg-drag UHPC panel 4 is enhanced, and the cohesion and durability of the egg-drag UHPC panel 4 are improved.

[0030] The insulation part includes a composite concrete slurry cast inside the permafrost zone groove 2, the composite concrete slurry includes concrete slurry and cotton wool, and also includes a steel plate 9 arranged in contact with the inner wall of the permafrost zone groove 2, wherein the cotton wool is mesh woven and is arranged in multiple layers inside the concrete slurry, the spacing between the two layers of cotton wool is 2-4 cm, and the thickness of the steel plate 9 is 1-2 cm.

[0031] The thermal insulation component is used to maintain the internal temperature of the permafrost zone below the foundation, and is reinforced with steel plate 9 to prevent ground water from flowing directly into the permafrost zone and frost heave. At the same time, the composite concrete slurry uses a composite material composed of cotton wool and ordinary concrete. While improving the strength of the concrete, it can reduce the internal porosity of the concrete and reduce heat loss, thereby improving the thermal insulation effect. At the same time, it also has the effect of reducing the entry of moisture, further reducing the probability of frost heave.

[0032] Based on the above structure, in this embodiment, the sinking tank area is set to 60 cm, the thickness of the egg-shaped UHPC panel is 20 cm, and the height of the mineral admixture mixture is 10 cm. A double-layer egg-shaped UHPC panel foundation is constructed and applied to roadbed or foundation construction in permafrost areas. The application method is as follows: S1. Dig permafrost trenches at intervals of 120 cm outside the permafrost foundation construction area to a depth of 150 cm. S2. Select the egg-shaped UHPC panel forming area inside the permafrost foundation construction area, construct a sunken trough area, and use a pile driver to break it to a depth of 60 cm. S3. Dig a deep conical sinking trough at the bottom of the sinking trough area to clean the broken soil inside the egg-drag UHPC panel forming area; S4. According to the required number of egg-drag UHPC panels, anchor rods of corresponding height are driven into the sinking tank area; S5. Cast egg-shaped UHPC panels with a thickness of 20 cm, reserve conical recessed hole areas, and place anchor rods at alternate positions in the conical recessed hole areas; S6. For the multi-layer egg-shaped UHPC panel, add a mineral admixture mixture with a height of 10 cm 3 hours after the egg-shaped UHPC panel is cast, ensure that the egg-shaped UHPC panel is in an unsolidified state to ensure the combination of the mineral admixture mixture and the egg-shaped UHPC panel, cast the egg-shaped UHPC panel again on its surface, and use a fixed mold to cast a conical casting to cover the anchor rod; S7. Concrete slurry and cotton woven mesh are sequentially poured and placed inside the frozen soil trench. Specifically, after pouring concrete of equal thickness inside the frozen soil trench, the concrete pouring height is flush with the surface of the frozen soil trench. After pouring, formwork is placed outside the concrete, and the cotton woven mesh is covered on the side of the formwork. The next layer of concrete is poured, and this process is repeated until the frozen soil trench is fully filled. A steel plate is installed at the location where it fits the inner wall of the frozen soil trench. After pouring, the formwork is removed and the concrete is allowed to solidify. Due to the removal of the formwork, unsolidified concrete can automatically fill the formwork position. After solidification, a gap exists at the top of the frozen soil trench for subsequent backfilling. S8. After the egg-shaped UHPC panels and concrete slurry to be poured have solidified, the surface of the trapezoidal backfill soil is compacted to completely cover the permafrost trench and the permafrost foundation construction area, completing the foundation structure construction.

[0033] The working principle of the present invention is as follows: the main structure of egg-drag UHPC panels and anchor rods is used as the foundation reinforcement body, multiple layers of egg-drag UHPC panels are set, and a mixture of mineral admixtures is used for reinforcement to improve the overall stability and strength of the foundation. At the same time, based on the special conditions of permafrost areas, an insulation structure is set, which includes a steel plate structure to effectively prevent water infiltration and reduce the risk of frost heave.

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A permafrost area foundation treatment structure based on an egg-tow type UHPC panel, comprising a permafrost area foundation construction area (1) and a permafrost area trench (2), wherein the permafrost area foundation construction area (1) is located in a permafrost area and is divided into a rectangular area, the permafrost area trench (2) is rectangular, located outside the permafrost area foundation construction area (1), and equidistantly extends outside the permafrost area foundation, the permafrost area foundation construction area (1) is provided with anchor rods (3), the anchor rods (3) are uniformly distributed inside the permafrost area foundation construction area (1), the bottoms of all the anchor rods (3) are plugged into the permafrost area, the tops of the anchor rods (3) are fixed with cast egg-tow type UHPC panels (4), the egg-tow type UHPC panels (4) are stacked in a plurality in a height direction, reinforcement members are filled between the plurality of egg-tow type UHPC panels (4), and the permafrost area trench (2) is filled with a thermal insulation member.

2. The permafrost area foundation treatment structure based on the egg-drag type UHPC panel (4) and its application according to claim 1 is characterized in that: The top of the frozen soil area foundation construction area (1) is drilled and broken to form a sinking trough area (5), and the bottom of the sinking trough area (5) is deeply dug with a conical sinking trough (6), and the conical sinking troughs (6) are evenly distributed at the bottom of the sinking trough.

3. The permafrost area foundation treatment structure based on the egg-drag type UHPC panel (4) and its application according to claim 2 is characterized in that: One side of the egg-shaped UHPC panel (4) is a conical concave hole area, and a plurality of conical concave holes are provided inside the conical concave hole area. The conical concave holes are pushed out to form a conical protrusion on the other side of the egg-shaped UHPC panel (4). The conical protrusion extends into the inside of the conical sinking trough (6) and is cast in contact with the inner wall of the conical sinking trough (6). The top of the egg-shaped UHPC panel (4) is flush with the surface of the frozen soil area foundation construction area (1).

4. The permafrost area foundation treatment structure based on the egg-drag type UHPC panel (4) and its application according to claim 1 is characterized in that: The top of the anchor rod (3) exceeds the top of the egg-shaped UHPC panel (4) by 15-20 cm, and the side of the anchor rod (3) is provided with a conical casting body (7) integrally cast with the egg-shaped UHPC panel (4). The conical casting body (7) surrounds the side of the anchor rod (3), and the top of the conical casting body (7) is flush with the top of the anchor rod (3). The anchor rod (3) is arranged at the distance between two conical recessed hole areas along the egg-shaped UHPC panel (4).

5. The permafrost area foundation treatment structure based on the egg-drag type UHPC panel (4) and its application according to claim 4 is characterized in that: All egg-towed UHPC panels (4) are backfilled with trapezoidal backfill soil on their sides, the trapezoidal backfill soil covers the frozen soil groove (2) and the side areas of the egg-towed UHPC panels (4), and the surface of the trapezoidal backfill soil is compacted.

6. The permafrost area foundation treatment structure based on the egg-drag type UHPC panel (4) and its application according to claim 1 is characterized in that: The reinforcement comprises a mineral admixture mixture, the height of the mineral admixture mixture is 10-15 cm, the mineral admixture mixture is a mixture of fly ash and silica fume, and the mass ratio of fly ash to silica fume is 1:

2.

7. The permafrost area foundation treatment structure based on the egg-drag type UHPC panel (4) and its application according to claim 1 is characterized in that: The thermal insulation component includes a composite concrete slurry poured inside the permafrost zone groove (2), the composite concrete slurry includes concrete slurry and cotton wool, and also includes a steel plate (9) arranged to fit the inner wall of the permafrost zone groove (2).

8. The permafrost area foundation treatment structure based on the egg-drag type UHPC panel (4) and its application according to claim 7 is characterized in that: The cotton wool is woven in a mesh shape and is arranged in multiple layers inside the concrete slurry. The distance between two layers of cotton wool is 2-4 cm. The thickness of the steel plate (9) is 1-2 cm.

9. Use of the foundation treatment structure according to claims 1 to 8 in the field of roadbed or foundation construction.

10. The use according to claim 9, characterized in that The application method is as follows: S1. Dig permafrost trenches at intervals of 80-120 cm outside the permafrost foundation construction area, with a depth of 100-150 cm; S2. Select the egg-shaped UHPC panel forming area inside the permafrost foundation construction area, construct a sunken trough area, and construct it 150-180cm away from the above-mentioned permafrost trench area. Use a pile driver to break it to a depth of 40-60cm. S3. Dig a deep conical sinking trough at the bottom of the sinking trough area to clean the broken soil inside the egg-drag UHPC panel forming area; S4. According to the required number of egg-drag UHPC panels, anchor rods of corresponding height are driven into the sinking tank area; S5. Cast egg-shaped UHPC panels with a thickness of 15-20 cm, reserve conical recessed hole areas, and place anchor rods at alternate positions in the conical recessed hole areas; S6. For multi-layer egg-shaped UHPC panels, add a mineral admixture mixture with a height of 10-15 cm 2-3 hours after the egg-shaped UHPC panels are cast, cast the egg-shaped UHPC panels again on the surface, and use a fixed mold to cast a conical casting to cover the anchor rods; S7. Concrete slurry and cotton woven mesh are poured and placed in sequence inside the permafrost trench, and steel plates are installed on the inner wall of the permafrost trench; S8. After the egg-shaped UHPC panels and concrete slurry to be poured have solidified, the surface of the trapezoidal backfill soil is compacted to completely cover the permafrost trench and the permafrost foundation construction area, completing the foundation structure construction.

Images