A thermal insulation reinforcement structure for saline soil roadbed slopes under freeze-thaw cycles

Abstract

The present invention discloses a heat preservation and reinforcement structure for saline soil roadbed slope under freeze-thaw cycles, comprising a road surface, a roadbed and a slope body, wherein the road surface is laid on the upper part of the roadbed, the slope body is arranged outside the roadbed, an insulation layer is laid on the upper part of the outer inclined surface of the slope body, an anti-seepage layer is laid on the upper part of the insulation layer, an anti-seepage layer is poured on the upper part of the anti-seepage layer, a solar cell panel is set on the upper part of the anti-erosion concrete layer, and heating anchor rods are arranged on the slope top, slope foot and slope surface perpendicular to the slope body, and the heating anchor rods penetrate the heat preservation layer, the anti-seepage layer and the anti-erosion concrete layer; the heat preservation structure can effectively ensure that the roadbed slope body obtains heat preservation, anti-seepage and structural stability through the arrangement of the heat preservation layer, the anti-seepage layer, the anti-erosion concrete layer, the solar cell panel and the heating anchor rods, and effectively solves the problems of salt swelling, frost swelling and thawing settlement and the like occurring in saline soil roadbed slopes in seasonally frozen areas, and has the characteristics of good heat preservation and temperature control effects and high structural stability of the roadbed slope.

Description

Technical Field

[0001] The invention relates to the technical field of slope protection engineering, and in particular to a heat preservation and reinforcement structure for saline soil roadbed slopes under freeze-thaw cycles. Background Art

[0002] Saline soil is widely distributed in my country, and road diseases in saline soil areas are serious. With the development of highway construction, more and more experts and scholars have conducted investigations and research in the field of saline soil roadbed prevention and control. The main causes of saline soil foundation diseases in my country are: saline soil dissolution when it comes into contact with water, salt swelling of sulfate foundations, and corrosion of foundations and underground structures. Therefore, saline soil areas in seasonally frozen areas are affected by freeze-thaw cycles, resulting in frequent salt swelling, freeze-thaw settlement and other diseases in saline soil projects. These often cause engineering problems such as roadbed settlement and deformation, roadbed slope collapse, and insufficient foundation bearing capacity. These diseases seriously affect the stability of the project, pose a huge safety hazard to construction safety, and become the key to the success or failure of projects in saline soil areas.

[0003] Currently, the main method of slope reinforcement is to use existing concrete piles for pouring on-site to enhance the overall stability of the roadbed slope. However, the poured concrete itself contains a certain amount of water, which can easily lead to structural instability of the roadbed slope due to salt swelling, frost heave and thaw settlement of the foundation, and frost heave of the reinforced structure. In-depth research has found that salt swelling, frost heave and thaw settlement, and other diseases in saline soil projects in seasonally frozen areas are all related to the freeze-thaw cycle of water. Currently, there is no effective means to overcome the problems of the above-mentioned existing technologies in the structural stability of foundation slopes in this geological environment.

[0004] Therefore, it is urgent to design a thermal insulation reinforcement structure for saline soil roadbed slopes under freeze-thaw cycles to solve the problems existing in the above-mentioned prior art, reinforce the roadbed slopes, and improve the overall stability of the roadbed slopes. Summary of the Invention

[0005] In response to the above-mentioned problems, the present invention aims to provide a thermal insulation and reinforcement structure for saline soil roadbed slopes under freeze-thaw cycles. This thermal insulation structure can effectively ensure that the main body of the roadbed slope achieves thermal insulation, impermeability and structural stability through the arrangement of an insulation layer, an anti-seepage layer, an anti-erosion concrete layer, solar panels and heating anchor rods, effectively solving the problems of salt swelling, frost heave and thaw settlement that occur in saline soil roadbed slopes in seasonally frozen areas, and has the characteristics of good thermal insulation and temperature control effects and high structural stability of the roadbed slope.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A thermal insulation and reinforcement structure for saline soil roadbed slopes under freeze-thaw cycles comprises a pavement, a roadbed, and a slope body. The pavement is laid on the upper part of the roadbed, and the slope body is arranged outside the roadbed. An insulation layer is laid on the upper part of the outer inclined surface of the slope body, and an anti-seepage layer is laid closely to the upper part of the insulation layer. An anti-erosion concrete layer is poured on the upper part of the anti-erosion concrete layer, and a solar cell panel is set on the upper part of the anti-erosion concrete layer. Heating anchor rods are arranged on the top, toe, and slope surface of the slope perpendicular to the slope body, and the heating anchor rods penetrate the insulation layer, the anti-seepage layer, and the anti-erosion concrete layer.

[0008] Preferably, the insulation layer is made of high-toughness geotextile sandwiched with XPS insulation board, wherein the XPS insulation board is arranged between the high-toughness geotextile on the inner and outer sides;

[0009] The anti-seepage layer is a composite geotextile, wherein the upper and lower layers of the anti-seepage layer are non-woven permeable geotextiles, and the middle layer is a water-isolating geomembrane.

[0010] Preferably, the heating anchor rod comprises a tree-shaped anchor rod and a heating rod.

[0011] The tree-shaped anchor rod is anchored in the main body of the slope;

[0012] The heating rod is arranged in the tree-shaped anchor rod, and a thermal conductor is filled between the tree-shaped anchor rod and the heating rod. A concrete block box is cast at the upper end of the heating rod. A temperature controller, a battery and a charging controller are arranged in the concrete block box. The battery is connected to the heating wire arranged in the heating rod through the temperature controller. The heating wire is a carbon fiber heating cable, which is spirally arranged in the heating rod. A temperature sensor is also provided at the bottom of the heating rod. The bottom of the tree-shaped anchor rod and the heating rod are also provided with detection holes for use with the temperature sensor.

[0013] Preferably, the tree-shaped anchor rod is a double-layer anchor rod;

[0014] A positioning and installation cavity is provided on the inner side of the inner wall of the tree-shaped anchor rod, the heating rod is provided in the positioning and installation cavity, and a heat conductive agent is filled between the heating rod and the inner wall of the tree-shaped anchor rod;

[0015] A grouting interlayer is provided between the outer wall and the inner wall of the tree-shaped anchor rod, and the grouting interlayer is communicated with the grouting connector at the upper end of the tree-shaped anchor rod;

[0016] A positioning platform and a grouting hole are also provided on the outer wall of the tree-shaped anchor rod. The positioning platform is a trapezoidal structure with a larger upper part and a smaller lower part arranged on the outside of the outer wall of the tree-shaped anchor rod; the grouting hole passes through the outer wall of the tree-shaped anchor rod and is connected to the grouting interlayer, and a one-way grouting mechanism is also provided in the grouting hole.

[0017] Preferably, the grouting interlayer is provided with a multi-level surface sealing ring, the sealing ring is arranged in the grouting interlayer through a positioning convex ring, and a grouting pipe connection hole is provided on the sealing ring for use with the grouting pipe.

[0018] Preferably, the one-way grouting mechanism includes a seal, a first return spring and a guide ring.

[0019] The guide collar is fixedly arranged in the grouting hole, and a collar is arranged on the front side of the guide collar to cooperate with the first return spring;

[0020] The first return spring is arranged between the guide collar and the sealing member;

[0021] The seal is a sleeve structure movably arranged on the front ring of the guide ring, and a plurality of slurry leakage holes are arranged on the front end side wall of the seal for use in conjunction with the slurry rotation groove arranged in the grouting hole; the front end head of the seal is a conical structure with a small front and a large rear, and is used in conjunction with the conical notch inside the slurry rotation groove.

[0022] Preferably, the front end of the tree-shaped anchor rod is also integrally provided with a positioning head and a sleeve rod.

[0023] The positioning head is a conical anchoring piece arranged at the lower end of the sleeve rod, and a detection hole with a small inner side and a large outer side is arranged in the middle of the positioning head. The detection hole is used in conjunction with a temperature sensor;

[0024] The sleeve rod is arranged between the tree-shaped anchor rod and the positioning head, and an anchor rod head positioning mechanism is arranged on the sleeve rod.

[0025] Preferably, the anchor head positioning mechanism includes an anchor head positioning assembly and a linkage reset assembly that cooperate with each other, and the anchor head positioning assembly includes a kit, a first linkage rod, a second linkage rod and a second reset spring.

[0026] The sleeve is movably mounted on the sleeve rod, and is provided with a plurality of rotation connection slots for use in conjunction with the first linkage rod;

[0027] The first linkage rod is rotatably connected to the second linkage rod, and the lower end of the second linkage rod is rotatably connected to the positioning head. The first linkage rod is also provided with a plurality of anchoring slots;

[0028] The second return spring is movably sleeved on the sleeve rod and is used in conjunction with the sleeve and the positioning head.

[0029] Preferably, the linkage reset assembly includes a reset adjustment plate, a reset sleeve and a reset rod core.

[0030] The reset adjustment plate is arranged on the first linkage rod, and an inclined giving groove and a spherical clamping groove are arranged on the reset adjustment plate;

[0031] The reset sleeve is arranged on the second linkage rod and is used in conjunction with the reset rod core;

[0032] The reset rod core is arranged in the reset sleeve through the third reset spring, and a clamping ball is also arranged at the front end of the reset rod core, and the clamping ball is used in conjunction with the spherical clamping groove.

[0033] Preferably, a limit plate is further provided at the tail of the reset rod core, and the limit plate is used in conjunction with the third reset spring.

[0034] The beneficial effects of the present invention are as follows: the present invention discloses a heat preservation and reinforcement structure for saline soil roadbed slopes under freeze-thaw cycles. Compared with the prior art, the present invention has the following improvements:

[0035] The present invention designs a heat preservation and reinforcement structure for saline soil roadbed slopes under freeze-thaw cycles, comprising a pavement, a roadbed, a slope body, an insulation layer, an anti-seepage layer, an anti-erosion concrete layer, solar panels, and heating anchors. When in use:

[0036] 1. This structure drives heating anchor rods into the main body of the slope, tightly integrating the main body of the slope with the insulation layer, anti-seepage layer and anti-erosion concrete layer into a whole, effectively reinforcing the roadbed slope and improving the structural stability of the roadbed slope;

[0037] 2. The heating anchor rod is designed to consist of a temperature sensor, temperature controller, battery, charge controller, thermal conductor, heating rod, and tree-shaped anchor rod. Energy is provided by solar panels. When the temperature inside the main slope falls below the set temperature, the intelligent heating anchor rod begins to heat up, maintaining the slope's internal temperature at the appropriate level. This effectively solves problems such as salt heave, frost heave, and thaw settlement that occur on saline soil roadbed slopes in seasonally frozen areas, and provides excellent insulation and temperature control.

[0038] 3. By setting up tree-shaped anchor rods, the soil in the main body of the slope can be improved, the soil strength can be enhanced, and the stability of the slope soil can be ensured. It has the advantages of good insulation and temperature control effects and high structural stability of the roadbed slope. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of the roadbed slope thermal insulation reinforcement structure of the present invention.

[0040] Figure 2 This is the front view of the roadbed slope thermal insulation reinforcement structure of the present invention.

[0041] Figure 3 It is a structural schematic diagram of the heating anchor rod of the present invention.

[0042] Figure 4 This is a cross-sectional view of the heating anchor rod of the present invention.

[0043] Figure 5 It is a structural schematic diagram of the heating rod of the present invention.

[0044] Figure 6 A cross-sectional view of the heating rod of the present invention

[0045] Figure 7 It is a structural schematic diagram of the tree-shaped anchor rod of the present invention.

[0046] Figure 8 It is a cross-sectional view of the tree-shaped anchor rod of the present invention.

[0047] Figure 9 It is a partial enlarged view of the tree-shaped anchor rod A of the present invention.

[0048] Figure 10 It is a cross-sectional view of the one-way grouting mechanism of the present invention.

[0049] Figure 11 It is a partial enlarged view of the tree-shaped anchor rod B of the present invention.

[0050] Figure 12 It is a partial enlarged view of the tree-shaped anchor rod C of the present invention.

[0051] Figure 13 This is a structural diagram of the anchor head positioning mechanism of the present invention in use.

[0052] Figure 14 Schematic diagram of the structure of the first linkage rod and the second linkage rod of the present invention.

[0053] Figure 15 It is a cross-sectional view of the reset adjustment plate of the present invention.

[0054] Figure 16 It is a cross-sectional view of the reduction sleeve of the present invention.

[0055] Figure: 1. Pavement; 2. Roadbed; 3. Main slope; 4. Insulation layer; 5. Anti-seepage layer; 6. Anti-erosion concrete layer; 7. Solar panels; 8. Heating anchors; 9. Drainage ditch; 10. Temperature controller; 11. Battery; 12. Charge controller; 13. Heating guide wire; 14. Tree anchor; 15. Heating rod; 16. Temperature sensor; 17. Concrete block box; 18. Positioning platform; 19. Grouting hole; 20. Kit; 21. First linkage rod; 22. Second linkage rod; 23. Positioning head; 24. Grouting interlayer, 25. Grouting connector, 26. Positioning installation cavity, 27. Sleeve rod, 28. Seal, 29. Leakage hole, 30. First return spring, 31. Guide ring, 32. Sealing ring, 33. Positioning convex ring, 34. Anchoring slot, 35. Second return spring, 36. Anchor plate, 37. Inspection hole, 38. Grouting pipe connection hole, 39. Slurry rotation groove, 40. Reset adjustment plate, 41. Spherical slot, 42. Reset rod core, 43. Yield slot, 44. Spherical slot, 45. Card ball, 46. Third return spring DETAILED DESCRIPTION

[0056] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0057] Example 1: Refer to the attached Figure 1-16 The heat preservation and reinforcement structure of saline soil roadbed slope under freeze-thaw cycle shown in FIG1 includes a pavement 1, a roadbed 2 and a slope body 3, wherein

[0058] The road surface 1 is laid on the upper part of the roadbed 2;

[0059] The slope body 3 is arranged outside the roadbed, and an insulation layer 4 is laid on the upper part of the outer slope of the slope body 3, and an anti-seepage layer 5 is laid close to the upper part of the insulation layer 4. An anti-erosion concrete layer 6 is poured on the upper part of the anti-erosion layer 5, and a solar cell panel 7 is set on the upper part of the anti-erosion concrete layer 6. Heating anchor rods 8 are arranged on the top, foot and slope surface perpendicular to the slope body 3. The heating anchor rods 8 pass through the insulation layer 4, the anti-seepage layer 5 and the anti-erosion concrete layer 6. A drainage ditch 9 is also provided at the foot of the slope body 3.

[0060] Preferably, in order to provide insulation for the roadbed 2 and the slope body 3, the insulation layer 4 is designed to be made of high-toughness geotextile sandwiched with XPS insulation board, wherein the XPS insulation board is arranged between the high-toughness geotextiles on the inner and outer sides. The toughness of the high-toughness geotextile can effectively protect the XPS insulation board, which can prevent heat loss and provide insulation for the inner slope body 3.

[0061] Preferably, in order to play an anti-seepage role and avoid the intrusion of water on the inclined surface of the slope main body 3, which affects the stability of the saline soil of the slope main body 3, the anti-seepage layer 5 is designed to be tightly attached to the upper part of the thermal insulation layer 4. At the same time, in order to play an anti-seepage role, the anti-seepage layer 5 is designed to be a composite geotextile, wherein the upper and lower layers of the anti-seepage layer 5 are non-woven permeable geotextiles, and the middle is a water-isolating geomembrane with resistance to acid and alkali corrosion.

[0062] Preferably, the heating anchor rod 8 includes a tree-shaped anchor rod 14 and a heating rod 15, wherein

[0063] The tree-shaped anchor rod 14 is anchored in the slope body 3.

[0064] The heating rod 15 is installed within the tree-shaped anchor rod 14. A thermal conductive agent is filled between the tree-shaped anchor rod 14 and the heating rod 15. A concrete block 17 is cast in place at the upper end of the heating rod 15. Concrete block 17 houses a temperature controller 10, a battery 11, and a charge controller 12. The battery 11 is connected to a heating wire 13 within the heating rod 15 via the temperature controller 10. The temperature controller 10 controls the heating of the heating wire 13. A temperature sensor 16 is also located at the bottom of the heating rod 15 to provide feedback and control of the heating process. Specifically, when the temperature sensor 16 detects that the slope's internal temperature is below or near 0°C, the temperature controller 10 controls the connection between the battery 11 and the heating wire 13. The heating wire 13 begins operating and transfers heat to the soil through the thermal conductive agent and the tree-shaped anchor rod 14. When the temperature sensor 16 detects that the slope's internal temperature is above a set value, such as 5°C, the battery 11 stops operating.

[0065] Preferably, in order to facilitate real-time monitoring of the internal temperature of the slope, a detection hole 37 is further provided at the bottom of the tree-shaped anchor rod 14 and the heating rod 15 to communicate with the detection probe of the temperature sensor 16.

[0066] Preferably, in order to achieve a good heating effect, the heating guide wire 13 is designed to be a carbon fiber heating cable, which is spirally arranged inside the heating rod 15.

[0067] The construction process and construction principle of the thermal insulation reinforcement structure for saline soil roadbed slope under freeze-thaw cycles described in this embodiment include the following steps:

[0068] S1: Trim the slope surface according to the designed slope, determine the drilling center position of the intelligent heating anchor on the roadbed slope and mark it;

[0069] S2: Drill a hole at the location of the heating anchor rod 8, clean the hole, place the intelligent heating anchor rod into the hole, fix the position and then perform grouting;

[0070] S3: Laying a thermal insulation layer 4 on the upper portion of the slope body 3;

[0071] S4: Laying an anti-seepage layer 5 on the upper portion of the thermal insulation layer 4;

[0072] S5: pouring an anti-erosion concrete layer 6 on the top of the anti-seepage layer 5;

[0073] S6: Install the solar cell panel 7 on the top of the anti-erosion concrete layer 6 .

[0074] Example 2: Different from the above-mentioned Example 1, in order to improve the soil in the slope body 3 and enhance the soil strength by using the tree-shaped anchor rod 14 during use, the tree-shaped anchor rod 14 is designed to be a double-layer anchor rod;

[0075] A positioning and mounting cavity 26 is provided on the inner side of the inner wall of the tree-shaped anchor rod 14 , and the heating rod 15 is provided in the positioning and mounting cavity 26 , and a heat conductive agent is filled between the heating rod 15 and the inner wall of the tree-shaped anchor rod 14 ;

[0076] A grouting interlayer 24 is provided between the outer wall and the inner wall of the tree-shaped anchor rod 14. The grouting interlayer 24 is connected to a grouting connector 25 at the upper end of the tree-shaped anchor rod 14. When in use, the grouting connector 25 is connected to an external grouting pipe to inject grout into the grouting interlayer 24 through the grouting connector 25.

[0077] A positioning platform 18 and a grouting hole 19 are also provided on the outer wall of the tree-shaped anchor rod 14. The positioning platform 18 is a trapezoidal structure with a larger upper part and a smaller lower part, which is provided on the outside of the outer wall of the tree-shaped anchor rod. It is used to position the anchor rod in the anchor hole when in use and to enhance the pull-out resistance of the anchor rod. The grouting hole 19 passes through the outer wall of the tree-shaped anchor rod and is connected with the grouting interlayer 24. In order to prevent the slurry from flowing back during grouting, a one-way grouting mechanism is also provided in the grouting hole 19.

[0078] Preferably, in order to ensure the grouting pressure of each working surface during grouting and avoid excessive slurry penetrating the grouting interlayer 24, resulting in different grouting amounts on each working surface and affecting the anchoring quality of the tree-shaped anchor rod 14 in the slope body 3, the grouting method of the tree-shaped anchor rod 14 is designed to be step-by-step grouting. Specifically, a multi-level surface grouting ring 32 is provided in the grouting interlayer 24, and the grouting ring 32 is fixedly installed in the grouting interlayer 24 by a positioning convex ring 33, and a grouting pipe connection hole 38 is provided on the grouting ring 32 for use with the grouting pipe; when in use, grouting is performed by grouting from bottom to top, which can make the grouting pressure at each grouting hole 19 on a single working plane equal, thereby effectively ensuring the grouting quality on each working plane and ensuring the anchoring effect of the tree-shaped anchor rod 14 in the slope body 3.

[0079] Preferably, in order to prevent the slurry from flowing back during the grouting process, the one-way grouting mechanism is designed to include a seal 28, a first return spring 30 and a guide ring 31, wherein

[0080] The guide collar 31 is fixedly mounted in the grouting hole 19 via a tail positioning ring, and a collar is provided on the front side of the guide collar 31 to cooperate with the first return spring 30;

[0081] The first return spring 30 is installed between the guide ring 31 and the seal 28 and is used to return the seal 28 to the original position so that the seal 28 can seal the grouting hole 19;

[0082] The seal 28 is a sleeve structure movably mounted on the front ring of the guide ring 31, and a plurality of slurry leakage holes 29 are provided on the front end side wall of the seal 28 for use in conjunction with the slurry rotation groove 39 provided in the grouting hole 19. That is, when in use, when grouting is performed through the grouting interlayer 24, the seal 28 is pushed outward under the pressure of the slurry, so that the slurry leakage holes 29 are located at the position of the slurry rotation groove 39, and the slurry enters the slurry leakage holes 29 through the slurry rotation groove 39. The slurry flowing out of the slurry leakage holes 29 is pressed into the surrounding soil outside the grouting hole 19, thereby improving the soil and anchoring the tree-shaped anchor rod 14 at the same time.

[0083] Preferably, in order to enable the seal 28 to play a sealing role to seal the grouting hole 19 after the first return spring 30 is reset, the front end head of the seal 28 is designed to be a conical structure with a small front and a large back, and is used in conjunction with the conical notch on the inner side of the slurry trough 39. That is, when in use, when the inner side of the front end plate of the seal 28 is subjected to slurry pressure, the front end of the seal 28 is stuck in the conical notch to seal the grouting hole 19 to avoid backflow during the grouting process.

[0084] Preferably, in order to ensure the anchoring effect of the front end of the tree-shaped anchor rod 14 in the slope body 3 during use, a positioning head 23 and a sleeve rod 27 are integrally formed at the front end of the tree-shaped anchor rod 14.

[0085] The positioning head 23 is a conical anchoring piece provided at the lower end of the sleeve rod 27, and a detection hole 37 with a smaller inner portion and a larger outer portion is provided in the middle of the positioning head 23 to ensure the detection effect of the temperature sensor 16 while preventing external soil from entering the interior of the tree-shaped anchor rod 14;

[0086] The sleeve rod 27 is arranged between the tree-shaped anchor rod 14 and the positioning head 23, and an anchor rod head positioning mechanism is provided on the sleeve rod 27 for positioning and anchoring the front end of the tree-shaped anchor rod 14 in the slope body 3 when in use.

[0087] Preferably, the anchor head positioning mechanism includes an anchor head positioning assembly and a linkage reset assembly that cooperate with each other, and the anchor head positioning assembly includes a kit 20, a first linkage rod 21, a second linkage rod 22 and a second reset spring 35, wherein

[0088] The sleeve 20 is movably mounted on the sleeve rod 27, and a plurality of rotation connection grooves are provided on the sleeve 20 for use with the first linkage rod 21. When in use, the rotation connection of the first linkage rod 21 is achieved by snapping the upper end of the first linkage rod 21 into the rotation connection groove.

[0089] The first linkage rod 21 is rotatably connected to the second linkage rod 22, and the lower end of the second linkage rod 22 is rotatably connected to the positioning head 23. That is, when the sleeve 20 moves along the length direction of the sleeve rod 27, the first linkage rod 21 and the second linkage rod 22 are driven to rotate relative to each other, thereby expanding their anchoring radius and making them closely contact with the surrounding soil.

[0090] The second reset spring 35 is movably mounted on the sleeve rod 27 and is used in conjunction with the sleeve 20 and the positioning head 23 to reset the sleeve 20 so that when the tree-shaped anchor rod 14 is installed, the front end diameter of the tree-shaped anchor rod 14 is not larger than the diameter of the positioning platform 18, so as to facilitate the installation of the tree-shaped anchor rod 14.

[0091] Preferably, in order to ensure the contact area between the first linkage rod 21 and the upper soil when the first linkage rod 21 is expanded and to ensure the anchoring effect of the first linkage rod 21 , a plurality of anchoring slots 34 are further provided on the first linkage rod 21 .

[0092] Preferably, in order to facilitate the application of an inclined component force by the first linkage rod 21 and the second linkage rod 22 when in use, so that the first linkage rod 21 and the second linkage rod 22 can be quickly opened when prestress is applied to the tree anchor rod 14 from the outside, the linkage reset assembly is designed to include a reset adjustment plate 40, a reset sleeve 41 and a reset rod core 42, wherein

[0093] The reset adjustment plate 40 is provided on the first linkage rod 21 and is provided with an inclined paving groove 43 and a spherical clamping groove 44;

[0094] The reset sleeve 41 is hingedly mounted on the second linkage rod 22 and is used in conjunction with the reset rod core 42;

[0095] The reset rod core 42 is movably installed in the reset sleeve 41 through the third reset spring 46, and a card ball 45 is also provided at the front end of the reset rod core 42. The card ball 45 is used in conjunction with the spherical card groove 44. When in use, when the tree anchor 14 is installed, due to the action of the second reset spring 35, the first linkage rod 21 and the second linkage rod 22 are parallel to each other, and the front end diameter of the tree anchor 14 is not larger than the diameter of the positioning platform 18. At this time, it is in an extreme state, and the third reset spring 46 is compressed (the elastic force of the second reset spring 35 is greater than that of the third reset spring 46), the reset rod core 42 is flatly stuck in the give way groove 43. Since the give way groove 43 is an inclined groove, an outward component force is always given to the hinge point of the first linkage rod 21 and the second linkage rod 22. Therefore, when prestress is applied to the tree-shaped anchor rod 14 from the outside, the elastic force of the second reset spring 35 is overcome, the outward component force and the retraction force of the third reset spring 46 to restore the deformation can make the first linkage rod 21 and the second linkage rod 22 open quickly, avoiding the problem that the hinge point cannot rotate when the first linkage rod 21 and the second linkage rod 22 are parallel.

[0096] Preferably, in order to squeeze the third reset spring 46 to contract when the reset rod core 42 moves, a limit plate 47 is further provided at the tail of the reset rod core 42 , and the limit plate 47 is used in conjunction with the third reset spring 46 .

[0097] Preferably, in order to apply prestress to the outside of the tree-shaped anchor rod 14 during use, the tree-shaped anchor rod 14 can be tightly anchored in the soil within the slope body 3. An anchor plate 36 is also provided on the outside of the tree-shaped anchor rod 14. When in use, prestress is applied to the tree-shaped anchor rod 14 by tensioning the rear end of the tree-shaped anchor rod 14. The anchor plate 36 can ensure the prestressing effect of the tree-shaped anchor rod 14 after tensioning.

[0098] The use process and principle of the tree-shaped anchor rod 14 in this embodiment include:

[0099] S1.1: Before drilling, determine the hole position and mark it according to the design requirements and soil conditions; after drilling, rinse the bottom of the hole with clean water until the hole mouth is clear.

[0100] S1.2: Assembly and placement of anchor rod

[0101] Make the anchor rod according to the design requirements, so that the anchor rod is in the center of the drill hole, and install the tree-shaped anchor rod 14 in the drill hole, so that the rod body is always in the center of the drill hole after installation;

[0102] S1.3: Grouting

[0103] Grouting materials should be determined according to design requirements. It is recommended to use cement mortar with a water-cement ratio of 0.38-0.45 and a water-cement ratio of 0.40-0.45. If necessary, a certain amount of admixtures or additives can be added.

[0104] During grouting, a grouting pipe is installed in the grouting interlayer 24 and connected to the grouting connector 25, and grouting is performed step by step from bottom to top, so that the grouting pressure at each grouting hole 19 on a single working plane is equal, thereby effectively ensuring the grouting quality on each working plane and the anchoring effect of the tree-shaped anchor rod 14 in the slope body 3;

[0105] S1.4: Tensioning and Locking

[0106] When the tree anchor rod 14 is tensioned according to the design requirements, prestress is applied. At this time, the first linkage rod 21 and the second linkage rod 22 expand outwards and act on the surrounding soil to achieve prestressed anchoring of the tree anchor rod 14. After tensioning, the tree anchor rod 14 is locked using the anchor plate 36.

[0107] S1.5: Install the heating rod

[0108] The heating rod 15 is installed in the installation cavity 26 , and a heat conductive agent is filled between the heating rod 15 and the inner wall of the tree-shaped anchor rod 14 to fix the heating rod 15 .

[0109] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat preservation and reinforcement structure for saline soil roadbed slopes under freeze-thaw cycles, comprising a pavement, a roadbed, and a slope body, wherein the pavement is laid on top of the roadbed and the slope body is arranged outside the roadbed, and is characterized by: An insulation layer is laid on the upper portion of the outer slope of the main body of the slope, an anti-seepage layer is laid closely to the upper portion of the insulation layer, an anti-erosion concrete layer is poured on the upper portion of the anti-erosion concrete layer, a solar cell panel is set on the upper portion of the anti-erosion concrete layer, and heating anchor rods are provided on the top, foot and slope surface of the slope perpendicular to the main body of the slope, and the heating anchor rods penetrate the insulation layer, the anti-seepage layer and the anti-erosion concrete layer; The heating anchor rod includes a tree-shaped anchor rod and a heating rod. The tree-shaped anchor rod is anchored in the main body of the slope; The heating rod is arranged in the tree-shaped anchor rod, and a thermal conductor is filled between the tree-shaped anchor rod and the heating rod. A concrete block box is cast in place at the upper end of the heating rod. A temperature controller, a battery and a charge controller are arranged in the concrete block box. The battery is connected to a heating wire arranged in the heating rod through the temperature controller. The heating wire is a carbon fiber heating cable, which is spirally arranged in the heating rod. A temperature sensor is also provided at the bottom of the heating rod. The bottoms of the tree-shaped anchor rod and the heating rod are also provided with detection holes for use with the temperature sensor. The tree-shaped anchor rod is a double-layer anchor rod; A positioning and installation cavity is provided on the inner side of the inner wall of the tree-shaped anchor rod, the heating rod is provided in the positioning and installation cavity, and a heat conductive agent is filled between the heating rod and the inner wall of the tree-shaped anchor rod; A grouting interlayer is provided between the outer wall and the inner wall of the tree-shaped anchor rod, and the grouting interlayer is communicated with the grouting connector at the upper end of the tree-shaped anchor rod; The outer wall of the tree-shaped anchor rod is also provided with a positioning platform and a grouting hole. The positioning platform is a trapezoidal structure with a larger upper portion and a smaller lower portion, which is provided on the outer side of the tree-shaped anchor rod; the grouting hole passes through the outer wall of the tree-shaped anchor rod and is connected to the grouting interlayer, and a one-way grouting mechanism is also provided in the grouting hole; The grouting interlayer is provided with a multi-level surface sealing ring, which is arranged in the grouting interlayer through a positioning convex ring, and a grouting pipe connection hole is provided on the sealing ring for use with the grouting pipe; The one-way grouting mechanism includes a seal, a first return spring and a guide ring. The guide collar is fixedly arranged in the grouting hole, and a collar is arranged on the front side of the guide collar to cooperate with the first return spring; The first return spring is arranged between the guide collar and the sealing member; The seal is a sleeve structure movably arranged on the front ring of the guide ring, and a plurality of slurry leakage holes are arranged on the front end side wall of the seal for use in conjunction with the slurry rotation groove arranged in the grouting hole; the front end head of the seal is a conical structure with a small front and a large rear, and is used in conjunction with the conical notch inside the slurry rotation groove.

2. The heat preservation and reinforcement structure for saline soil roadbed slope under freeze-thaw cycles according to claim 1, characterized in that: The insulation layer is made of high-toughness geotextile sandwiched with XPS insulation board, wherein the XPS insulation board is arranged between the high-toughness geotextile on the inner and outer sides; The anti-seepage layer is a composite geotextile, wherein the upper and lower layers of the anti-seepage layer are non-woven permeable geotextiles, and the middle layer is a water-isolating geomembrane.

3. The heat preservation and reinforcement structure for saline soil roadbed slope under freeze-thaw cycles according to claim 1, characterized in that: The front end of the tree-shaped anchor rod is also integrally provided with a positioning head and a sleeve rod. The positioning head is a conical anchoring piece arranged at the lower end of the sleeve rod, and a detection hole with a small inner side and a large outer side is arranged in the middle of the positioning head. The detection hole is used in conjunction with a temperature sensor; The sleeve rod is arranged between the tree-shaped anchor rod and the positioning head, and an anchor rod head positioning mechanism is arranged on the sleeve rod.

4. The heat preservation and reinforcement structure for saline soil roadbed slope under freeze-thaw cycles according to claim 3, characterized in that: The anchor head positioning mechanism includes an anchor head positioning assembly and a linkage reset assembly that cooperate with each other. The anchor head positioning assembly includes a kit, a first linkage rod, a second linkage rod and a second reset spring. The sleeve is movably mounted on the sleeve rod, and is provided with a plurality of rotation connection slots for use in conjunction with the first linkage rod; The first linkage rod is rotatably connected to the second linkage rod, and the lower end of the second linkage rod is rotatably connected to the positioning head. The first linkage rod is also provided with a plurality of anchoring slots; The second return spring is movably sleeved on the sleeve rod and is used in conjunction with the sleeve and the positioning head.

5. The heat preservation and reinforcement structure for saline soil roadbed slope under freeze-thaw cycles according to claim 4, characterized in that: The linkage reset assembly includes a reset adjustment plate, a reset sleeve and a reset rod core. The reset adjustment plate is arranged on the first linkage rod, and an inclined giving groove and a spherical clamping groove are arranged on the reset adjustment plate; The reset sleeve is arranged on the second linkage rod and is used in conjunction with the reset rod core; The reset rod core is arranged in the reset sleeve through the third reset spring, and a clamping ball is also arranged at the front end of the reset rod core, and the clamping ball is used in conjunction with the spherical clamping groove.

6. The heat preservation and reinforcement structure for saline soil roadbed slope under freeze-thaw cycles according to claim 5, characterized in that: The tail of the reset rod core is further provided with a limit plate, and the limit plate is used in conjunction with the third reset spring.

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