A telescopic lattice anchor support structure for an expansive soil slope

Abstract

The application relates to the field of expansive soil slopes, and discloses a telescopic lattice anchor rod supporting structure for an expansive soil slope. In the application, the outer side hollow surface of a slope surface is provided with a sleeve rod, the inner surface of the sleeve rod is inserted with an insertion rod, and the two ends of the insertion rod are in communication with each other. The sleeve rod can be divided into two parts, so that the insertion rod and the air bag can be conveniently installed. The air bag is first installed on the sleeve rod, and the two parts of the sleeve rod are sleeved on the insertion rod, so that the accommodating section and the air bag correspond to each other. The length of the accommodating section is not less than the length of the air bag, the position of the accommodating section corresponds to the air bag during installation, the insertion rod is located at the extrusion section outside the slope surface, and the inner wall of the end of the sleeve rod close to the outer side of the slope surface is provided with internal threads which are threadedly connected with the external threads on the extrusion section.

Description

Technical Field

[0001] This application belongs to the field of expansive soil slope technology, specifically a retractable lattice anchor support structure for expansive soil slopes. Background Technology

[0002] Expansive soil slopes refer to slopes or engineering structures composed of expansive soil. They exhibit the characteristic of expanding upon water absorption and shrinking upon water loss, often leading to engineering problems such as landslides and foundation settlement. Expansive soil contains hydrophilic minerals such as montmorillonite and illite, which expand in volume upon water absorption (free expansion rate ≥40%) and shrink upon water loss, causing surface cracking and structural damage. Their porous nature allows water to easily seep in, accelerating the risk of landslides. Grid anchors are a slope reinforcement technology that combines grid beams (concrete or reinforced concrete mesh structures) with anchors (or cables) to form an integrated support system, used to improve slope stability and prevent landslides or collapses. It combines deep reinforcement and shallow slope protection functions and is widely used in soil slopes, loose deposit slopes, and urban construction scenarios.

[0003] However, the anchor structure commonly used in expansive soil slopes may collapse when subjected to heavy rainfall, due to insufficient strength of the support structure and excessive upper load. Moreover, common support structures still cause surface soil erosion, resulting in poor slope protection and ecological management, thus reducing the effectiveness of expansive soil slopes. Utility Model Content

[0004] The purpose of this application is to address the problems of insufficient strength of the aforementioned support structures and soil erosion on the surface of expansive soil slopes by providing a retractable grid-anchor support structure for expansive soil slopes. The technical solution adopted in this application is as follows: A retractable grid anchor support structure for expansive soil slopes includes a slope surface. An outer sleeve rod is provided on the outer hollow surface of the slope surface. An insert rod is inserted into the inner surface of the outer sleeve rod. The two ends of the insert rod are interconnected. A nut is threaded onto the outer end surface of the outer sleeve rod. A stop plate is provided on the lower surface of the nut. A through groove is opened on the outer wall surface of the outer sleeve rod. An air bladder is fixedly connected to the surface of the through groove. The middle part of the air bladder is fixedly connected to the side wall of the outer sleeve rod. The insert rod includes several compression sections and receiving sections, which are sequentially and alternately connected.

[0005] By adopting the above technical solution, the outer sleeve rod can be divided into two parts, which facilitates the installation of the insert rod and the airbag. The airbag is first installed on the outer sleeve rod, and then the two parts of the outer sleeve rod are fitted over the insert rod, so that the receiving section corresponds to the airbag. The length of the receiving section is not less than the length of the airbag. During installation, the position of the receiving section corresponds to the airbag, thus making the section of the insert rod outside the slope surface the compression section. Furthermore, the inner wall of the end of the outer sleeve rod near the outer side of the slope surface is provided with an internal thread that engages with the external thread on the compression section, facilitating the directional movement of the compression airbag, providing convenience and stability. After first inserting the outer sleeve rod into the anchor holes drilled on the slope surface, the end cap is then used... The insert rod is rotated by the handle, which causes the compression section to compress towards the air bladder. The compressed air bladder expands outwards, aligning the outer rod. Tightening the nut allows the abutment plate to press against the slope surface, sealing the anchor hole and ensuring proper contact with the slope. After removing the end cap, cement mortar is injected into the anchor hole through the hollow insert rod. This mortar coats the outer rod and air bladder, allowing it to penetrate the soil and increase anchoring strength. The end cap is then installed. Because the air bladder protrudes from the outer rod, the combined effect of the cement mortar and the air bladder enhances the pull-out resistance of the outer rod, making it adaptable and practical.

[0006] In a preferred embodiment, the outer sleeve rod is divided into two parts along the axial direction and fixed to each other by a set pipe clamp.

[0007] By adopting the above technical solution, the set pipe clamps can be used to fix the outer sleeve rod, thereby making the outer sleeve rod more stable and reliable during use, and making it practical and stable.

[0008] In a preferred embodiment, the bottom of the outer sleeve rod is threadedly connected to an anchor head, and the outer surface of the anchor head has multiple through holes.

[0009] By adopting the above technical solution, the anchor head is first screwed into the end of the outer sleeve rod, and multiple through holes are opened on its surface to prevent the insertion rod from being blocked and affecting the grouting, thus ensuring its stability and safety.

[0010] In a preferred embodiment, an end cap is threaded onto the outer surface of the insertion rod, and a handle is provided on the outer surface of the end cap.

[0011] By adopting the above technical solution, the end cap can be rotated by rotating the handle, so that the end cap can be tightened on the insertion rod and continue to rotate, thereby driving the inner insertion rod to rotate. Furthermore, the end cap can be removed to pour cement mortar into the interior, making it versatile and adaptable.

[0012] In a preferred embodiment, the inner surface of the slope is provided with expansive soil, the outer surface of the slope is equipped with a grid beam, the inner surface of the grid beam is provided with a water guide pipe, and the inner surface of the grid beam is covered with slope protection vegetation.

[0013] By adopting the above technical solution, the drainage system composed of water pipes and intercepting / drainage ditches can enable the rapid discharge of rainwater, prevent the accumulation of water in the grid structure from increasing the self-weight of the slope, which would lead to a decrease in stability. At the same time, it can also reduce the erosion of the surface soil by rainwater, making it protective and adaptable.

[0014] In a preferred embodiment, a water interception ditch is provided on the top surface of the slope, sloping drainage ditches are provided on both sides of the slope, and a drainage ditch is provided on the top surface of the slope.

[0015] By adopting the above technical solution, the excavation depth of the intercepting ditch, sloping drainage ditch and drainage ditch exceeds the design depth of conventional ditch by more than 10 centimeters, and vegetation protection pads are installed at the bottom. After the installation is completed, the backfill soil is used for deep compaction, thereby forming a drainage system to achieve rapid discharge of rainwater, making it practical and comprehensive.

[0016] In a preferred embodiment, the outer surfaces of the intercepting ditch and the drainage ditch are paved with sloping drainage ditches, the outer surfaces of the expansive soil are provided with vegetation protection mats, and the upper surfaces of the vegetation protection mats are fitted with U-shaped nails.

[0017] By adopting the above technical solution, the vegetation protection mat is made of a high-toughness polyester material that is difficult to degrade. Its characteristics are corrosion resistance, radiation resistance, good durability, and it forms a self-growth system with the slope vegetation, thus enabling it to achieve long-term protection. The U-shaped nails installed can more firmly connect the vegetation protection mat to the surface of the slope, making it versatile and fixed.

[0018] In a preferred embodiment, the outer surfaces of the intercepting ditch, the sloping drainage ditch, and the drainage ditch are provided with waterproof membrane, and the upper outer surface of the waterproof membrane is provided with backfill soil.

[0019] By adopting the above technical solutions, the waterproof membrane can effectively prevent water from seeping into the soil and causing it to expand and deform. The backfill soil can deeply compact the trenches, making them adaptable and protective.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are: In this application, the outer sleeve rod can be divided into two parts, facilitating the installation of the insert rod and airbag. The airbag is first installed on the outer sleeve rod, and then the two parts of the outer sleeve rod are fitted over the insert rod, ensuring that the receiving section corresponds to the airbag. The length of the receiving section is not less than the length of the airbag. During installation, the position of the receiving section corresponds to the airbag, allowing the section of the insert rod located outside the slope surface to be the compression section. Furthermore, the inner wall of the end of the outer sleeve rod near the outer slope surface has an internal thread that engages with the external thread on the compression section, facilitating the directional movement of the compression airbag and providing convenience and stability. After inserting the outer sleeve rod into the pre-drilled anchor holes on the slope surface, the end cap is used for rotation... Rotating the handle with the insert rod causes the compression section to move towards the air bladder, which in turn expands the outer sleeve rod, aligning it with the slope surface. Tightening the nut then secures the abutment plate to the slope surface, sealing the anchor hole and ensuring proper contact with the slope. After removing the end cap, cement mortar is injected into the anchor hole through the hollow insert rod, encapsulating the outer sleeve rod and air bladder. This allows the cement mortar to penetrate the soil, increasing anchor strength. Finally, the end cap is installed. Because the air bladder protrudes from the outer sleeve rod, the combined effect of the cement mortar and the air bladder enhances the pull-out resistance of the outer sleeve rod, making it adaptable and practical. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the intercepting ditch structure in this application; Figure 3 This is a schematic diagram of the drainage ditch structure in this application; Figure 4 This is a schematic diagram of the outer sleeve structure in this application; Figure 5 This is a schematic diagram of the insert structure in this application; Figure 6 This is a schematic diagram of the through-slot structure in this application.

[0022] The markings in the diagram are: 1. Expansive soil; 2. Vegetation protection mat; 3. Interception ditch; 4. U-shaped nail; 5. Slope protection vegetation; 6. Slope drainage ditch; 7. Grid beam; 8. Water pipe; 9. Slope surface; 10. Drainage ditch; 11. Waterproof membrane; 12. Backfill soil; 13. Outer rod; 14. Support plate; 15. Nut; 16. Anchor head; 17. Through hole; 18. Pipe clamp; 19. End cap; 20. Rotary handle; 21. Extrusion section; 22. Receiving section; 23. Through groove; 24. Airbag. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] Example: Reference Figure 1-6 A retractable grid anchor support structure for expansive soil slopes includes a slope surface 9, an outer hollow surface of the slope surface 9 is provided with an outer sleeve rod 13, an inner surface of the outer sleeve rod 13 is inserted with a plug rod, the two ends of the plug rod are connected to each other, and a nut 15 is threadedly connected to the outer end surface of the outer sleeve rod 13. A stop plate 14 is provided on the lower surface of the nut 15. The outer sleeve rod 13 can be divided into two parts, which facilitates the installation of the insert rod and the airbag 24. By first installing the airbag 24 onto the outer sleeve rod 13 and then covering the insert rod with the two parts of the outer sleeve rod 13, the receiving section 22 and the airbag 24 can be aligned. The length of the receiving section 22 is not less than the length of the airbag 24. During installation, the position of the receiving section 22 corresponds to the airbag 24. This allows the section of the insert rod located outside the slope surface 9 to be the extrusion section 21. Furthermore, the inner wall of the end of the outer sleeve rod 13 near the outer side of the slope surface 9 is provided with an internal thread that engages with the external thread on the extrusion section 21, which facilitates the directional movement of the extrusion airbag 24, thus providing convenience and stability.

[0025] Reference Figure 1-6The outer wall surface of the outer sleeve rod 13 is provided with a through groove 23, and an air bag 24 is fixedly connected to the surface of the through groove 23. The middle part of the air bag 24 is fixedly connected to the side wall of the outer sleeve rod 13. The insert rod includes several extrusion sections 21 and receiving sections 22, and the extrusion sections 21 and receiving sections 22 are connected alternately in sequence. After inserting the outer sleeve rod 13 into the pre-drilled anchor hole on the slope surface 9, the insert rod is rotated using the handle 20 on the end cap 19. This causes the compression section 21 to compress towards the air bladder 24, and the compressed air bladder 24 expands outwards, allowing the outer sleeve rod 13 to be centered. Then, the abutment plate 14 is pressed against the slope surface 9 by tightening the nut 15, and the abutment plate 14 seals the anchor hole to achieve contact with the slope surface 9. After removing the end cap 19, cement mortar is injected into the anchor hole through the hollow insert rod, allowing the mortar to coat the outer sleeve rod 13 and the air bladder 24. This allows the cement mortar to penetrate into the soil layer, increasing the anchoring strength. After reinstalling the end cap 19, the air bladder 24 protrudes from the outer sleeve rod 13, and the combined effect of the cement mortar on multiple air bladders improves the pull-out resistance of the outer sleeve rod 13, making it adaptable and practical.

[0026] Reference Figure 4 The outer sleeve rod 13 is divided into two parts along the axial direction and is fixed to each other by a set pipe clamp 18. The set pipe clamp 18 can be used to fix the outer sleeve rod 13, thereby making the outer sleeve rod 13 more stable and reliable during use, making it practical and stable.

[0027] Reference Figure 4 The bottom of the outer sleeve rod 13 is threadedly connected to an anchor head 16, and the outer surface of the anchor head 16 has multiple through holes 17. By first screwing the anchor head 16 into the end of the outer sleeve rod 13, the multiple through holes 17 on its surface can prevent the insertion rod from being blocked and affecting the grouting, thus ensuring stability and safety.

[0028] Reference Figure 5 An end cap 19 is threaded onto the outer surface of the insertion rod, and a handle 20 is provided on the outer surface of the end cap 19. By rotating the handle 20, the end cap 19 can be rotated, thus tightening the end cap 19 onto the insertion rod and allowing it to continue rotating. This, in turn, causes the inner insertion rod to rotate. Furthermore, the end cap 19 can be removed to pour cement mortar into the insertion rod, making it versatile and adaptable.

[0029] Reference Figure 1The inner surface of the slope surface 9 is covered with expansive soil 1, and the outer surface of the slope surface 9 is equipped with a grid beam 7. A water-guiding pipe 8 is installed on the inner surface of the grid beam 7, and slope protection vegetation 5 is laid on the inner surface of the grid beam 7. The drainage system, consisting of the water-guiding pipe 8 and the intercepting / drainage ditch, allows for rapid drainage of rainwater, preventing water accumulation within the grid that could increase the slope's self-weight and reduce stability. It also reduces rainwater erosion of the surface soil, providing both protection and adaptability.

[0030] Reference Figure 1 A water interception ditch 3 is constructed at the top surface of the slope 9, and sloping drainage ditches 6 are constructed on both sides of the slope 9. A drainage ditch 10 is constructed on the top surface of the slope 9. The excavation depth of the water interception ditch 3, sloping drainage ditches 6, and drainage ditch 10 exceeds the design depth of conventional ditches by more than ten centimeters. A vegetation protection mat 2 is installed at the bottom of each ditch. Once fully installed, the ditch is compacted with backfill soil 12 to form a drainage system that allows for rapid rainwater drainage, making it practical and comprehensive.

[0031] Reference Figure 1 The outer surfaces of the intercepting ditch 3 and the drainage ditch 10 are covered with sloping drainage ditches 6, and the outer surface of the expansive soil 1 is covered with vegetation protection mats 2. U-shaped nails 4 are installed on the upper surface of the vegetation protection mats 2. The vegetation protection mats 2 are made of high-toughness polyester material that is difficult to degrade. Its characteristics are corrosion resistance, radiation resistance, and good durability. It also forms a self-growth system with the slope protection vegetation 5, which can achieve long-term protection. The U-shaped nails 4 can make the vegetation protection mats 2 more firmly connected to the surface of the slope 9, so as to make it both diverse and fixed.

[0032] Reference Figure 1-3 Waterproof membrane 11 is installed on the outer surface of intercepting ditch 3, sloping drainage ditch 6, and drainage ditch 10, and backfill soil 12 is installed on the outer surface above the waterproof membrane 11. The waterproof membrane 11 can effectively prevent water from seeping into the soil and causing soil expansion and deformation, and the backfill soil 12 can deeply compact the trenches, making them adaptable and protective.

[0033] The implementation principle of the telescopic grid anchor support structure for expansive soil slopes in this application is as follows: The outer sleeve rod 13 can be divided into two parts, which facilitates the installation of the insert rod and the airbag 24. By first installing the airbag 24 onto the outer sleeve rod 13 and then covering the insert rod with the two parts of the outer sleeve rod 13, the receiving section 22 and the airbag 24 can be aligned. The length of the receiving section 22 is not less than the length of the airbag 24. During installation, the position of the receiving section 22 corresponds to the airbag 24, so that the section of the insert rod located outside the slope surface 9 is the compression section 21. Furthermore, the inner wall of the end of the outer sleeve rod 13 near the outer side of the slope surface 9 is provided with an internal thread that engages with the external thread on the compression section 21, which facilitates the directional movement of the compression airbag 24, providing convenience and stability. The outer sleeve rod 13 is first inserted into the slope surface 9 and then drilled. After the anchor hole is properly formed, the insert rod is rotated using the handle 20 on the end cap 19. This causes the compression section 21 to compress towards the air bladder 24, and the compressed air bladder 24 expands outwards towards the outer sleeve rod 13, thus centering the outer sleeve rod 13. The abutment plate 14 is then tightened to abut against the slope surface 9 by tightening the nut 15, and the abutment plate 14 seals the anchor hole to abut against the slope surface 9. After removing the end cap 19, cement mortar is injected into the anchor hole through the hollow insert rod, allowing the mortar to coat the outer sleeve rod 13 and the air bladder 24. This allows the cement mortar to penetrate into the soil layer, increasing the anchoring strength. After reinstalling the end cap 19, the air bladder 24 protrudes from the outer sleeve rod 13, and the combined effect of the cement mortar on the multiple air bladders increases the pull-out resistance of the outer sleeve rod 13, making it adaptable and practical.

[0034] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A retractable lattice anchor support structure for expansive soil slopes, comprising a slope surface (9), characterized in that: An outer sleeve rod (13) is provided on the hollow outer surface of the slope surface (9). An insert rod is inserted into the inner surface of the outer sleeve rod (13). The two ends of the insert rod are connected to each other. A nut (15) is threaded onto the outer end surface of the outer sleeve rod (13). A stop plate (14) is provided on the lower surface of the nut (15). A through groove (23) is opened on the outer wall surface of the outer sleeve rod (13). An air bladder (24) is fixedly connected to the surface of the through groove (23). The middle part of the air bladder (24) is fixedly connected to the side wall of the outer sleeve rod (13). The insert rod includes several extrusion sections (21) and receiving sections (22). The extrusion sections (21) and receiving sections (22) are connected alternately in sequence.

2. The retractable lattice anchor support structure for expansive soil slopes as described in claim 1, characterized in that: The outer sleeve rod (13) is divided into two parts along the axial direction and is fixed to each other by a set pipe clamp (18).

3. The retractable lattice anchor support structure for expansive soil slopes as described in claim 1, characterized in that: The bottom of the outer sleeve rod (13) is threaded with an anchor head (16), and the outer surface of the anchor head (16) is provided with multiple through holes (17).

4. The retractable lattice anchor support structure for expansive soil slopes as described in claim 1, characterized in that: The outer surface of the insertion rod is threaded with an end cap (19), and the outer surface of the end cap (19) is provided with a handle (20).

5. The retractable lattice anchor support structure for expansive soil slopes as described in claim 1, characterized in that: The inner surface of the slope surface (9) is provided with expansive soil (1), the outer surface of the slope surface (9) is provided with a grid beam (7), the inner surface of the grid beam (7) is provided with a water pipe (8), and the inner surface of the grid beam (7) is covered with slope protection vegetation (5).

6. The retractable lattice anchor support structure for expansive soil slopes as described in claim 1, characterized in that: A water interception ditch (3) is provided on the top surface of the slope (9), a slope drainage ditch (6) is provided on both sides of the slope (9), and a drainage ditch (10) is provided on the top surface of the slope (9).

7. A retractable lattice anchor support structure for expansive soil slopes as described in claim 6, characterized in that: The outer surfaces of the intercepting ditch (3) and the drainage ditch (10) are covered with sloping drainage ditches (6), and the outer surfaces of the expansive soil (1) are provided with vegetation protection mats (2). U-shaped nails (4) are installed on the upper surface of the vegetation protection mats (2).

8. A retractable lattice anchor support structure for expansive soil slopes as described in claim 7, characterized in that: Waterproof membrane (11) is provided on the outer surface of the intercepting ditch (3), the sloping drainage ditch (6) and the drainage ditch (10), and backfill soil (12) is provided on the upper outer surface of the waterproof membrane (11).

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