Asphalt concrete impermeable layer reverse arc section crack self-repairing mechanism and reservoir bottom structure

Abstract

The invention discloses a bituminous concrete impermeable layer reverse arc section crack self-repairing mechanism, and relates to the technical field of crack repairing of water conservancy and hydropower engineering, the bituminous concrete impermeable layer reverse arc section crack self-repairing mechanism comprises a heating net, a reinforcing net and an osmometer assembly, the heating net and the reinforcing net are both buried in an impermeable layer in the plane direction of the impermeable layer, and the osmometer assembly is arranged in the impermeable layer. The heating net is located above the reinforcing net, and the osmometer assembly is arranged in the reverse arc section of the impermeable layer and used for monitoring the water seepage pressure of the reverse arc section of the impermeable layer. The invention further provides a reservoir bottom structure which comprises a cushion layer, a leveling cementing layer, an anti-seepage layer and the asphalt concrete anti-seepage layer reverse arc section crack self-repairing mechanism, the anti-seepage layer, the leveling cementing layer and the cushion layer are sequentially arranged from top to bottom, the reinforcing net is arranged in the anti-seepage layer, and the reinforcing net is arranged in the anti-seepage layer. And the heating net is arranged in the reverse arc section of the impermeable layer. According to the invention, the crack can be self-healed, and the cracking part does not need to be chiseled and backfilled again.

Description

Technical Field

[0001] This invention relates to the field of crack repair technology in water conservancy and hydropower engineering, and in particular to a self-repairing mechanism for cracks in the reverse arc section of asphalt concrete anti-seepage layer and a reservoir bottom structure. Background Technology

[0002] With the vigorous development of pumped storage power stations, asphalt concrete panel construction technology has been applied in many projects. Asphalt concrete panels have excellent seepage prevention performance, effectively preventing water leakage, and also have good ductility and elasticity, adapting to uneven foundation deformation. Some projects require expansion excavation to meet reservoir capacity adjustment needs. Due to the irregular shape of the backfill area at the reservoir bottom, local stress concentration occurs. Furthermore, water pressure after reservoir impoundment causes the panel to stretch to both sides in the inverted arc section, and uneven deformation at the excavation-fill junction leads to a significant increase in tensile strain at the inverted arc section. When this strain exceeds the maximum tensile stress, cracks may occur in the inverted arc section of the asphalt concrete panel, affecting the continuity of the asphalt panel structure and reducing its seepage prevention capacity.

[0003] Currently, the cracking problem in the reverse arc section of asphalt concrete anti-seepage layers is typically prevented by local thickening or the use of reinforced structural designs such as polyester mesh. For existing cracks, the raised area is usually chiseled open, the base soil is leveled, and then refilled with asphalt concrete. However, asphalt concrete panels are high-viscosity materials with excellent anti-seepage properties. Chiseling and backfilling operations may damage the integrity and continuity of the panel, leading to increased porosity of the anti-seepage layer and thus reducing its anti-seepage effect. Therefore, there is an urgent need for a self-healing mechanism for cracks in the reverse arc section of asphalt concrete anti-seepage layers to solve the aforementioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a self-healing mechanism for cracks in the reverse arc section of asphalt concrete anti-seepage layer, so as to solve the problems existing in the prior art and enable the cracks to self-heal without having to chisel open the cracked part and refill it.

[0005] To achieve the above objectives, the present invention provides the following solution: This invention provides a self-healing mechanism for cracks in the reverse arc section of an asphalt concrete anti-seepage layer, comprising a heating mesh, a reinforcing mesh, and a piezometer assembly. The heating mesh and the reinforcing mesh are both embedded in the anti-seepage layer along the plane direction of the anti-seepage layer, with the heating mesh located above the reinforcing mesh. The piezometer assembly is disposed within the reverse arc section of the anti-seepage layer and is used to monitor the seepage pressure in the reverse arc section of the anti-seepage layer.

[0006] In some embodiments, a temperature sensor assembly is also included, which is disposed within the reverse arc section of the impermeable layer and above the heating grid. The temperature sensor assembly is used to monitor the temperature of the reverse arc section of the impermeable layer, and both the temperature sensor assembly and the piezometer assembly are connected to a central control system.

[0007] In some embodiments, the heating mesh is a resistance wire heating mesh, which includes multiple resistance wires connected in parallel, and the converging end of the multiple resistance wires is electrically connected to an ammeter and a voltage regulator.

[0008] In some embodiments, the reinforcing mesh is a Kevlar material reinforcing mesh.

[0009] In some embodiments, the piezometer assembly includes a vibrating wire piezometer, a signal cable, and a cover plate. A borehole is drilled on the reverse arc section of the seepage barrier, and fine sand is laid inside the borehole. The vibrating wire piezometer is fixedly installed inside the borehole. The cover plate covers the borehole and can seal the borehole. One end of the signal cable is connected to the vibrating wire piezometer, and the other end passes through the cover plate and is electrically connected to the central control system.

[0010] In some embodiments, the temperature sensor assembly includes a temperature sensor body, a sleeve, and a wire. The first end of the temperature sensor body is conical, and the anti-seepage layer has a receiving hole on its reverse arc section. The temperature sensor is fixedly disposed inside the sleeve, and the sleeve is fixedly disposed inside the receiving hole. The first end of the temperature sensor is in contact with the bottom of the receiving hole. The second end of the temperature sensor is electrically connected to the first end of the wire, and the second end of the wire is electrically connected to the central control system.

[0011] In some embodiments, the heating mesh is located 250mm-350mm from the top of the impermeable layer.

[0012] In some embodiments, the reinforcing mesh is 650mm-750mm away from the top of the impermeable layer.

[0013] In some embodiments, the distance between the first end of the temperature sensor body and the heating grid is 80-120 mm.

[0014] The present invention also provides a reservoir bottom structure, including a cushion layer, a leveling and bonding layer, an impermeable layer, and a self-healing mechanism for cracks in the reverse arc section of the asphalt concrete impermeable layer as described above. The impermeable layer, the leveling and bonding layer, and the cushion layer are arranged sequentially from top to bottom. The reinforcing mesh is provided in the impermeable layer, and the heating mesh is provided in the reverse arc section of the impermeable layer.

[0015] The present invention achieves the following technical effects compared to the prior art: The piezometer component of the self-healing mechanism for cracks in the reverse arc section of the asphalt concrete anti-seepage layer provided by this invention monitors the seepage pressure in the reverse arc section of the seepage layer in real time. After seepage occurs due to cracking in the reverse arc section of the anti-seepage layer at the bottom of the reservoir, the heating network can be controlled to heat the cracked area in a timely manner, allowing the asphalt and aggregate to bond and level again, preventing the crack from expanding and affecting the anti-seepage capacity of the asphalt concrete panel, thus enabling the crack to self-heal without the need to chisel open the cracked area and refill it. Moreover, the piezometer component and the heating network work together. The piezometer component promptly feeds back the collected seepage pressure signal, and the heating network responds accordingly, realizing automatic monitoring and timely repair of cracks, eliminating the need for frequent manual inspections and operations, and improving the timeliness and efficiency of crack repair. Furthermore, the reinforcing network provides structural reinforcement, and its high strength significantly reduces the risk of cracks caused by stress concentration in the reverse arc section, while forming a composite reinforcement structure with the asphalt concrete. The composite reinforcement structure formed by the reinforcing network and the asphalt concrete can effectively disperse and transfer the load, enhancing the overall structural stability of the anti-seepage layer. When subjected to external loads, the reinforcing mesh can bear some of the stress, reduce the stress on the asphalt concrete, thereby reducing the possibility of crack formation and improving the deformation resistance and durability of the impermeable layer. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the reservoir bottom structure in some embodiments of the present invention; Figure 2 This is a cross-sectional view of the reservoir bottom structure in some embodiments of the present invention; Figure 3 This is a schematic diagram of the heating mesh structure in some embodiments of the present invention; Figure 4 This is a schematic diagram of the structure of the piezometer assembly in some embodiments of the present invention; Figure 5 This is a schematic diagram showing the arrangement of the temperature sensor assembly in some embodiments of the present invention; Figure 6 This is a flowchart illustrating the repair process for cracks in the reverse arc section of the anti-seepage layer in some embodiments of the present invention.

[0018] In the diagram: 101-Impermeable layer; 1011-Reverse arc section; 100-Leveling cementing layer; 103-Bedding layer; 1-Heating mesh; 2-Wire; 3-Vibrating wire piezometer; 4-Reinforcing mesh; 5-Sleeve; 6-Temperature sensor body; 7-Ammeter; 8-Voltage regulator; 9-Power supply; 10-Cover plate; 11-Sealing mortar; 12-Signal cable; 13-Fine sand. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The purpose of this invention is to provide a self-healing mechanism for cracks in the reverse arc section of asphalt concrete anti-seepage layer, so as to solve the problems existing in the prior art, enabling the cracks to self-heal without having to chisel open the cracked part and refill it.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 like Figures 1-6As shown, this invention provides a self-healing mechanism for cracks in the reverse arc section of an asphalt concrete anti-seepage layer, comprising a heating net 1, a reinforcing net 4, and a piezometer assembly. Both the heating net 1 and the reinforcing net 4 are embedded in the anti-seepage layer 101 along its planar direction, with the heating net 1 positioned above the reinforcing net 4. The piezometer assembly is installed within the reverse arc section 1011 of the anti-seepage layer 101 to monitor the seepage pressure in this section. The piezometer assembly monitors the seepage pressure in the reverse arc section 1011 of the anti-seepage layer 101 in real time. After seepage occurs due to cracking in the reverse arc section 1011 of the anti-seepage layer 101 at the bottom of the reservoir, the heating net 1 can be controlled to heat the cracked area, allowing the asphalt and aggregate to bond and level again, preventing the crack from widening and affecting the anti-seepage capacity of the asphalt concrete panel. This allows the crack to self-heal without the need to chisel open and refill the cracked area. Furthermore, the piezometer assembly works in conjunction with the heating net 1. The piezometer assembly promptly feeds back the collected seepage pressure signals, and the heating net 1 responds by heating accordingly. This enables automatic monitoring and timely repair of cracks, eliminating the need for frequent manual inspections and operations, thus improving the timeliness and efficiency of crack repair. Additionally, the reinforcing net 4 provides structural reinforcement. Its high strength significantly reduces the risk of cracking caused by stress concentration in the reverse arc section 1011, while simultaneously forming a composite reinforcement structure with the asphalt concrete. This composite reinforcement structure effectively disperses and transfers loads, enhancing the overall structural stability of the impermeable layer 101. When subjected to external loads, the reinforcing net 4 can bear some of the stress, reducing the stress on the asphalt concrete and thus lowering the likelihood of crack formation, improving the deformation resistance and durability of the impermeable layer 101.

[0023] In some embodiments, the self-healing mechanism for cracks in the reverse arc section of the asphalt concrete anti-seepage layer further includes a temperature sensor assembly. The temperature sensor assembly is disposed within the reverse arc section 1011 of the anti-seepage layer 101 and above the heating net 1. The temperature sensor assembly monitors the temperature of the reverse arc section 1011 of the anti-seepage layer 101, and both the temperature sensor assembly and the piezometer assembly are connected to the central control system. Asphalt concrete has an optimal repair temperature range, which must be matched to the asphalt grade. Excessive temperature can lead to asphalt aging and component volatilization, thus reducing the strength and adhesion of the anti-seepage layer 101. The temperature sensor can monitor the temperature of the heating area in real time. When a set threshold is reached, the central control system immediately controls the heating net 1 to stop heating, preventing material damage due to overheating. The temperature sensor assembly monitors the heating temperature and cooling temperature of the asphalt concrete at the cracked area. After the cracked area of ​​the anti-seepage layer 101 cools naturally, the asphalt concrete anti-seepage layer 101 re-bonds to form a whole. The piezometer assembly collects frequency signals through a reading device. Once the seepage pressure returns to normal, the heating net 1 stops heating. The piezometer can monitor the changes in seepage pressure after crack repair (if the pressure returns to normal, it means that the leakage has stopped), and the temperature sensor can simultaneously record the temperature curve of the heating process (if the temperature reaches the standard and is stable). The combination of the two data can allow the central control system to more accurately determine whether the repair is successful, avoiding the problem of false repairs that may occur when relying solely on piezometer data (such as the crack being temporarily sealed by the asphalt softened by high temperature, but not fully bonded, and may crack again after cooling), or the inability to confirm whether the leakage has stopped when relying solely on temperature data.

[0024] In some embodiments, the heating mesh 1 is a resistance wire heating mesh, which includes multiple resistance wires connected in parallel. The converging ends of the multiple resistance wires are electrically connected to an ammeter 7 and a voltage regulator 8. Specifically, both the voltage regulator 8 and the ammeter 7 are located between the resistance wires and the power supply 9, with the ammeter 7 positioned between the voltage regulator 8 and the resistance wires. If a resistance wire fails due to aging or localized damage (such as breakage caused by concrete compression), only that branch stops heating, while the remaining resistance wires can still be powered and generate heat normally. The parallel design ensures that the heating mesh 1 retains most of its heating capacity even in the event of a localized failure, preventing cracks from being repaired in time due to a single resistance wire problem, thus significantly improving the reliability of the heating system. Furthermore, if a switch is installed on each circuit, each individual resistance wire can be independently controlled, allowing the selection of which resistance wire to activate for heating based on the location of the crack. In a parallel circuit, the voltage across each resistance wire is consistent (if the resistance wires are of the same specification, the current and power of each wire are the same), ensuring a more uniform heat distribution across the area covered by heating mesh 1. This avoids the problems of localized overheating and insufficient heating caused by large power differences at both ends due to the superposition of resistances in a series circuit. An ammeter 7 is connected in series at the junction of the resistance wires, providing real-time feedback on the overall or branch current changes of heating mesh 1. By observing these current changes, it is possible to determine in real time whether heating mesh 1 is operating normally. The heating requirements for asphalt concrete vary depending on the scenario. For example, in low-temperature environments (such as winter), the initial temperature of the impermeable layer 101 is low, requiring high power for rapid heating to the repair temperature (to prevent excessive heat loss). When the cracks are shallow, only low-power heating is needed to re-bond the asphalt. If the temperature sensor detects that the local temperature is close to the overheating threshold, the system can reduce the voltage and power through the voltage regulator 8 to prevent asphalt aging. The voltage regulator 8 makes the heating power dynamically adjustable from a fixed value, ensuring that the optimal heating intensity is matched for each repair scenario. The voltage regulator 8 is the core actuator of the central control system, enabling a closed-loop temperature feedback and power adjustment mechanism. When the temperature sensor detects that the temperature in the heating zone has not reached the target value, the system instructs the voltage regulator 8 to increase the voltage and boost the heating power. When the temperature approaches the threshold, the voltage regulator 8 decreases the voltage and reduces the power. When the temperature reaches the target value, the voltage regulator 8 cuts off the voltage and stops heating. This precise temperature control avoids overheating or underheating issues associated with fixed-power heating, maximizing both the repair effect and material safety.

[0025] In some embodiments, the reinforcing mesh 4 is a Kevlar reinforcing mesh. Kevlar reinforcing mesh, also known as para-aramid synthetic fiber, has very high strength, reaching approximately 3.6 GPa, and a higher tensile modulus than steel wire, exhibiting high rigidity. In the asphalt concrete anti-seepage layer 101, it can significantly enhance the structural strength of the reverse arc segment 1011, effectively reducing the risk of cracks caused by stress concentration. Furthermore, Kevlar has a low density and light weight, providing good reinforcement to the anti-seepage layer 101 without adding excessive weight, and will not place an excessive burden on the overall structure of the anti-seepage layer 101. Kevlar fibers also have good chemical and corrosion resistance, resisting the erosion of chemicals and moisture in the soil to a certain extent, ensuring the stable performance of the reinforcing mesh 4 in the anti-seepage layer 101. It also has good thermal stability, not melting at high temperatures, with a glass transition temperature of approximately 345°C, maintaining stable performance within a certain temperature range. When used in conjunction with the heating mesh 1, its performance will not be severely affected by heating. It should be noted that other types of aramid materials or geogrids can also be used for reinforcing mesh 4, as long as they have a certain degree of high temperature resistance and can provide good tensile strength.

[0026] In some embodiments, the piezometer assembly includes a vibrating wire piezometer 3, a signal cable 12, and a cover plate 10. A borehole is drilled in the reverse arc section 1011 of the seepage-proof layer 101, and fine sand 13 is laid inside the borehole. The vibrating wire piezometer 3 is fixedly installed inside the borehole. The cover plate 10 covers the borehole and seals it. Preferably, the cover plate 10 and the borehole are sealed with sealing mortar 11. One end of the signal cable 12 is connected to the vibrating wire piezometer 3, and the other end passes through the cover plate 10 and is electrically connected to the central control system. The vibrating wire piezometer 3 operates based on the principle that pressure changes cause changes in the vibrating wire frequency. It features high measurement accuracy, strong stability (small long-term drift), and good anti-interference ability (unaffected by electromagnetic interference). It can accurately capture minute seepage pressure changes in the reverse arc section 1011 (such as pressure fluctuations caused by minute seepage in the early stages of cracks), avoiding missed or misjudged crack conditions due to monitoring errors. The fine sand 13 laid inside the borehole has the characteristics of uniform pores and good water permeability, which can eliminate pressure transmission blind spots caused by sediment or voids at the bottom of the borehole. When cracks appear in the reverse arc section 1011 and water seeps in, the water can be evenly applied to the sensing end of the vibrating wire piezometer 3 through the fine sand 13 layer, ensuring that the piezometer can quickly and accurately sense the seepage pressure and avoid monitoring lag or data distortion caused by local water accumulation or poor pressure transmission. By drilling a hole in the reverse arc section 1011 and fixing the piezometer therein, compared with surface pasting or suspension, it is possible to effectively avoid displacement or detachment of the piezometer caused by thermal expansion and contraction or structural deformation of the seepage prevention layer 101, ensuring that the piezometer is always in the preset monitoring position and guaranteeing monitoring continuity. The cover plate 10 covers and seals the borehole, achieving two core functions: first, it prevents rainwater, dust, or impurities from the surface of the impermeable layer 101 from entering the borehole, avoiding blockage by the fine sand layer 13 (affecting permeability) or contamination of the piezometer probe (leading to monitoring errors); second, it isolates the area around the borehole from erosion by reservoir water or seepage, preventing borehole enlargement or damage to the piezometer components from water immersion, thus extending the equipment's service life. One end of the signal cable 12 is directly connected to the vibrating wire piezometer 3, and the other end passes through the cover plate 10 and is directly connected to the central control system. This avoids signal interruption or delay caused by environmental factors (such as concrete shielding or electromagnetic interference) that may affect wireless transmission, ensuring real-time feedback of seepage pressure data and providing a rapid response basis for the timely activation of the heating network 1. The cover plate 10 is sealed to prevent cable damage. The part where the signal cable 12 passes through the cover plate 10 is usually treated with sealant or waterproof joint. This can prevent water from seeping into the drill hole from the wire hole, fix the cable position, and prevent the cable from being pulled or worn due to deformation or vibration of the anti-seepage layer 101. This ensures that the signal transmission line is unobstructed for a long time and reduces monitoring interruptions caused by cable failures.

[0027] As a preferred embodiment, multiple piezometer components are provided to enable multi-point real-time monitoring. By evenly distributing multiple piezometer components at key locations of the inverted arc segment 1011 (such as stress concentration points, historically prone-to-cracking areas, and surface transitions), grid-like monitoring of the entire curved surface of the inverted arc segment 1011 can be achieved. This avoids the situation where single-point monitoring only covers a local area, leading to the missed detection of cracks (especially micro-cracks) in other locations, and ensures that all potential seepage risks can be captured.

[0028] In some embodiments, the temperature sensor assembly includes a temperature sensor body 6, a sleeve 5, and a wire 2. The sleeve 5 is preferably a thin-walled steel pipe. The first end of the temperature sensor body 6 is conical. A receiving hole is formed in the reverse arc section 1011 of the impermeable layer 101. The temperature sensor is fixedly installed inside the sleeve 5, which is also fixedly installed inside the receiving hole. The first end of the temperature sensor contacts the bottom of the receiving hole, specifically by insertion and embedding, followed by filling with asphalt. The second end of the temperature sensor is electrically connected to the first end of the wire 2, which is electrically connected to the central control system. The conical shape of the first end of the temperature sensor body 6, which contacts the bottom of the receiving hole, allows for more thorough heat exchange between the temperature sensor and the surrounding medium, enabling rapid and accurate sensing of temperature changes in the reverse arc section 1011 of the impermeable layer 101. The temperature sensor is fixedly installed inside the sleeve 5, which is then fixed inside the receiving hole, making the installation of the temperature sensor more secure and effectively resisting interference and damage from the external environment, such as water flow impact and soil compression. Meanwhile, the sleeve 5 also provides insulation and moisture protection, protecting the normal operation of the temperature sensor body 6 and extending its service life.

[0029] In some embodiments, the heating mesh 1 is 250mm-350mm away from the top of the impermeable layer 101, preferably 300mm. This distance ensures that the heat generated by the heating mesh 1 can be effectively transferred to the impermeable layer 101, so that the impermeable layer 101 can be sufficiently heated when needed to achieve functions such as self-repair of cracks, while also avoiding excessive heat concentration due to the close distance, which may damage the impermeable layer 101.

[0030] In some embodiments, the reinforcing mesh 4 is positioned 650mm-750mm, preferably 700mm, above the top of the impermeable layer 101. This distance places the reinforcing mesh 4 at a certain depth above the impermeable layer 101, allowing it to act as a load-bearing buffer layer to support loads from the upper structure (such as backfill or pavement) or the external environment (such as vehicle traffic or foot traffic). When external pressure is applied, the reinforcing mesh 4 can disperse stress through its tensile and tear resistance properties, preventing the load from being directly transferred to the impermeable layer 101 and reducing the risk of cracking or damage to the impermeable layer 101 due to localized stress concentration.

[0031] In some embodiments, the distance between the first end of the temperature sensor body 6 and the heating grid 1 is 80-120mm, preferably 100mm. This distance allows the temperature sensor to detect temperature changes relatively quickly, and because there is a certain distance between it and the heating grid 1, it does not directly detect the temperature of the concentrated temperature area directly heated by the heating grid 1, but can detect the average temperature of the asphalt concrete after heating, so the data is more in line with the repair needs.

[0032] Example 2 like Figure 2 As shown, this embodiment also provides a reservoir bottom structure, including a cushion layer 103, a leveling and bonding layer 100, an impermeable layer 101, and a self-repairing mechanism for cracks in the reverse arc section 1011 of the asphalt concrete impermeable layer 101 as described in Embodiment 1. The impermeable layer 101, the leveling and bonding layer 100, and the cushion layer 103 are arranged sequentially from top to bottom. Reinforcing mesh 4 is installed within the impermeable layer 101, and heating mesh 1 is installed within the reverse arc section 1011 of the impermeable layer 101. The bonding effect of the leveling and bonding layer 100 can eliminate the interface gaps between the cushion layer 103 and the impermeable layer 101, preventing reservoir water from seeping along the interlayer. The permeability of the cushion layer 103 can guide seepage from the foundation, preventing water from accumulating at the bottom of the impermeable layer 101 and forming high pressure, further reducing leakage or damage to the impermeable layer 101 caused by excessive water pressure, and comprehensively ensuring the impermeability safety of the reservoir bottom.

[0033] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A self-healing mechanism for cracks in the reverse arc section of an asphalt concrete anti-seepage layer, characterized in that: The device includes a heating mesh, a reinforcing mesh, and a piezometer assembly. The heating mesh and the reinforcing mesh are both buried in the seepage barrier along the plane of the seepage barrier, with the heating mesh located above the reinforcing mesh. The piezometer assembly is disposed within the reverse arc section of the seepage barrier and is used to monitor the seepage pressure of the reverse arc section of the seepage barrier.

2. The self-healing mechanism for the reverse arc section cracks in the asphalt concrete anti-seepage layer according to claim 1, characterized in that: It also includes a temperature sensor assembly, which is disposed within the reverse arc section of the impermeable layer and located above the heating network. The temperature sensor assembly is used to monitor the temperature of the reverse arc section of the impermeable layer, and both the temperature sensor assembly and the piezometer assembly are connected to the central control system.

3. The self-healing mechanism for the reverse arc section cracks in the asphalt concrete anti-seepage layer according to claim 2, characterized in that: The heating mesh is a resistance wire heating mesh, which includes multiple resistance wires connected in parallel, and the converging ends of the multiple resistance wires are electrically connected to an ammeter and a voltage regulator.

4. The self-healing mechanism for the reverse arc section cracks in the asphalt concrete anti-seepage layer according to claim 1, characterized in that: The reinforcing mesh is made of Kevlar material.

5. The self-healing mechanism for the reverse arc section cracks in the asphalt concrete anti-seepage layer according to claim 2, characterized in that: The piezometer assembly includes a vibrating wire piezometer, a signal cable, and a cover plate. A borehole is drilled on the reverse arc section of the seepage-proof layer, and fine sand is laid inside the borehole. The vibrating wire piezometer is fixedly installed inside the borehole. The cover plate covers the borehole and can seal the borehole. One end of the signal cable is connected to the vibrating wire piezometer, and the other end passes through the cover plate and is electrically connected to the central control system.

6. The self-healing mechanism for the reverse arc section cracks in the asphalt concrete anti-seepage layer according to claim 2, characterized in that: The temperature sensor assembly includes a temperature sensor body, a sleeve, and a wire. The first end of the temperature sensor body is conical, and the anti-seepage layer has a receiving hole on its reverse arc section. The temperature sensor is fixedly installed inside the sleeve, and the sleeve is fixedly installed inside the receiving hole. The first end of the temperature sensor is in contact with the bottom of the receiving hole. The second end of the temperature sensor is electrically connected to the first end of the wire, and the second end of the wire is electrically connected to the central control system.

7. The self-healing mechanism for the reverse arc section cracks in the asphalt concrete anti-seepage layer according to claim 6, characterized in that: The heating mesh is located 250mm-350mm from the top of the impermeable layer.

8. The self-healing mechanism for the reverse arc section cracks in the asphalt concrete anti-seepage layer according to claim 1, characterized in that: The reinforcing mesh is located 650mm-750mm from the top of the impermeable layer.

9. The self-healing mechanism for the reverse arc section cracks in the asphalt concrete anti-seepage layer according to claim 7, characterized in that: The distance between the first end of the temperature sensor body and the heating grid is 80-120mm.

10. A reservoir bottom structure, characterized in that: The invention includes a subbase, a leveling and bonding layer, an impermeable layer, and a self-healing mechanism for cracks in the reverse arc section of the asphalt concrete impermeable layer as described in any one of claims 1-9. The impermeable layer, the leveling and bonding layer, and the subbase are arranged sequentially from top to bottom. The reinforcing mesh is provided within the impermeable layer, and the heating mesh is provided within the reverse arc section of the impermeable layer.

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