A self-healing system and method for anti-buoyancy piles

Abstract

The application relates to the technical field of building engineering, and discloses an anti-floating pile self-repairing system, which comprises an anti-floating pile body, the inside of the anti-floating pile body is provided with a repairing pipeline for transmitting a repairing agent, the repairing pipeline is made of a water-triggered solidified polymer material, and the repairing pipeline is solidified by being in contact with concrete slurry during concrete pouring. The repairing pipeline is broken under the action of pressure, the repairing agent seeps into cracks and reacts with underground water to be solidified, and the cracks are automatically repaired, which effectively reduces the crack rate of the anti-floating pile body, avoids the expansion of the cracks to cause the overall or local failure of the anti-floating pile, guarantees the safety and stability of the building, reduces basement floor cracking, water seepage and other problems caused by the failure of the anti-floating pile, reduces relevant economic losses, reduces the maintenance cost of the anti-floating pile cracks, avoids the problems of overall or local anti-floating failure, meets the requirements of high speed and high standard of engineering construction, and has a wide market prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering, in particular to an anti-floating pile self-repairing system and method thereof. BACKGROUND

[0002] In a large commercial complex construction project in the city center, due to limited site and complex functional requirements, the basement is large in scale and deep in burial depth, the underground water level in this area is high, and the anti-floating pile is a key structure to ensure the stability of the basement, and its reliability is crucial.

[0003] However, during the construction of the project, due to the long-term effect of underground water buoyancy on the anti-floating pile, combined with the disturbance factors that may exist in the construction process, cracks in the anti-floating pile occur from time to time.

[0004] The traditional anti-floating pile lacks effective self-repairing ability, and once cracks occur, it can only rely on manual repair. In this large commercial complex project, the basement area is tens of thousands of square meters, and the number of anti-floating piles is large. Manual detection of cracks not only requires a large amount of manpower and time, but also is difficult to achieve comprehensive and timely detection of all cracks. Some small cracks are not discovered in time, and these undiscovered cracks gradually expand under the erosion of subsequent underground water, ultimately affecting the overall performance of the anti-floating pile.

[0005] When cracks in the anti-floating pile are found, the traditional repair method is manual drilling and grouting. In the construction environment in the city center, the site is narrow and the surrounding buildings are dense, and the construction space is limited. When drilling and grouting is performed, large equipment needs to be brought in, which not only increases the construction difficulty, but also may affect the foundation of the surrounding existing buildings. At the same time, drilling and grouting operations need to suspend the construction of the relevant area, which further prolongs the construction period of the entire project.

[0006] If the cracks in the anti-floating pile are not repaired in time and effectively, the cracks will continue to expand over time, and eventually the anti-floating pile may fail as a whole or in part. In this commercial complex project, if some anti-floating piles fail, the pressure on the basement floor will be uneven, which may cause the floor to crack and seep water. Once the basement seeps water, it will not only affect the normal use of the basement, such as causing water accumulation in the underground parking lot and equipment damage, but also may affect the business operation of the businesses in the commercial complex, causing economic disputes. Moreover, the cost of repairing the seepage problem is extremely high, and a series of complex work such as plugging and drainage needs to be done, further increasing the construction and operation cost of the project.

[0007] Therefore, the present application provides an anti-floating pile self-repairing system and method thereof. SUMMARY

[0008] To solve the technical problems in the background art, the present application provides an anti-floating pile self-repairing system and a method thereof.

[0009] The anti-floating pile self-repairing system provided by the present application comprises an anti-floating pile body, and a repair pipeline for transmitting a repairing agent is arranged in the anti-floating pile body.

[0010] The repair pipeline is made of a water-triggered solidified polymer material, and is solidified by being in contact with concrete slurry during concrete pouring.

[0011] Specifically, the water-triggered solidified polymer material comprises a water-solidified polyurethane (PUA) and reinforcing fibers.

[0012] The repair pipeline comprises a repair main pipe, an annular connecting pipe and a repair fine pipe.

[0013] The number of the repair main pipes is multiple, and the repair main pipes are longitudinally arranged in the anti-floating pile body and annularly and symmetrically distributed along the axis of the anti-floating pile body.

[0014] The repair main pipe is a main component of the repair pipeline system, and multiple repair main pipes are longitudinally arranged and annularly and symmetrically distributed along the axis of the anti-floating pile body.

[0015] For example, when a crack occurs in a certain part of the pile body, corresponding repair main pipes can timely deliver repairing agents no matter where the crack is located, thereby improving the comprehensiveness and reliability of self-repairing.

[0016] The annular connecting pipes are installed between the multiple repair main pipes and are in communication with each other.

[0017] The annular connecting pipe plays a role of connecting the various repair main pipes, so that the entire repair pipe system forms a connected repair pipe network, and the plurality of annular connecting pipes are evenly distributed along the pile body axis, further enhancing the transmission capacity of the repair agent in the pile body, which not only enables the repair agent in the repair main pipe to be horizontally transmitted, so that the repair agent is more evenly distributed, but also balances the pressure between the repair main pipes to a certain extent, ensuring stable flow of the repair agent in the entire system, when cracks appear in the area near a repair main pipe and more repair agent is needed, the annular connecting pipe can timely allocate repair agent from other repair main pipes to ensure smooth repair work;

[0018] The repair fine pipes are installed on the annular connecting pipe and are connected to each other, the number of the repair fine pipes is multiple and is evenly distributed, and the free ends of the repair fine pipes extend to the interior of the anti-floating pile body;

[0019] The repair fine pipes are the key channels for the repair agent to reach the cracks, they are evenly distributed on the annular connecting pipe and have free ends extending to the interior of the pile body, and can penetrate into the fine cracks in the interior of the pile body, since the positions and sizes of the cracks are uncertain, the evenly distributed repair fine pipes can maximize the coverage of the areas where cracks may occur in the interior of the pile body, when the repair main pipe and the annular connecting pipe deliver the repair agent, the repair fine pipes can accurately deliver the repair agent to the cracks, so that effective repair of the cracks is realized, and the precision of self-repair is improved;

[0020] When cracks appear in the interior of the anti-floating pile body, the external force on the wall of the repair pipe gradually increases, and rupture occurs when the external force reaches a critical value, under the action of the internal pressure of the repair pipe, the repair agent rapidly penetrates into the deep cracks and triggers solidification with underground water, so that automatic repair of the cracks in the interior of the anti-floating pile body is realized, this automatic repair mechanism does not need manual intervention, can timely treat the cracks, effectively reduces the crack rate of the anti-floating pile body, avoids further expansion of the cracks to cause overall or local failure of the anti-floating pile, greatly reduces the maintenance cost, and ensures the safety and stability of the building.

[0021] As a further optimized scheme of the present application, the number of the repair main pipes is 6-8, and the spacing between adjacent two repair main pipes is 80-100mm;

[0022] Through a large number of experiments and engineering practice verification, the number of the repair main pipes is set to 6-8, and the spacing between adjacent two repair main pipes is controlled to be 80-100mm, so that the repair effect is ensured, and the cost and construction difficulty are considered, if the number of the repair main pipes is too small or the spacing is too large, some areas may not be timely repaired, affecting the comprehensiveness of repair, and if the number is too large or the spacing is too small, the material cost and construction complexity are increased, and such an optimized design not only ensures that the repair agent can evenly cover the interior of the pile body, but also ensures the economy and operability of the system.

[0023] As a further optimization of the present invention, the two adjacent annular connecting pipes are parallel to each other and spaced 200mm apart, which can ensure that the repair agent can be uniformly transmitted between the repair main pipes at different heights. This spacing can ensure that there is enough space between the annular connecting pipes to accommodate the flow of the repair agent, and can also ensure their connection and support effect to the repair main pipe. If the spacing is too large, the transmission of the repair agent at different heights may be hindered, affecting the repair efficiency. If the spacing is too small, it may cause material waste and an overly complex structure, which helps to improve the performance of the entire repair system.

[0024] As a further optimization of the present invention, the axis of the annular connecting pipe is aligned with the axis of the anti-buoyancy pile body and parallel to the axis of the repair main pipe. The annular connecting pipe includes multiple arc-shaped pipes, each arc-shaped pipe is respectively disposed between two adjacent repair main pipes, and the two ends of the arc-shaped pipe are respectively fixed and sealed with the reserved installation holes on the adjacent repair main pipes.

[0025] This layout makes the structure of the repair pipeline system within the pile more regular, which is conducive to the uniform distribution and flow of the repair agent. It not only effectively prevents the repair agent from leaking, but also enhances the stability of the entire repair pipeline system, ensuring that the repair pipeline can continue to work normally during the use of the anti-buoyancy pile.

[0026] As a further optimization of the present invention, the repair agent in the repair pipe is a mixture of isocyanate (IPDI) and defoamer;

[0027] Isocyanate (IPDI) has good reactivity. When IPDI reacts with water, the isocyanate group (-NCO) reacts with water molecules to form a polyurea structure (R-NHCONH-R) and releases CO2 gas. The polymer formed by this reaction has high tensile strength (about 20-60 MPa) and an elastic modulus close to that of concrete. It can adapt to small deformations in cracks and can react rapidly with groundwater in cracks to effectively fill and repair cracks. The addition of defoamer is to prevent the generation of too many bubbles during the reaction between the repair agent and groundwater. Too many bubbles will affect the structural strength and density of the repair agent after curing, reducing the repair effect. The selection of this mixed material fully considers the chemical reaction characteristics and actual needs in the repair process, ensuring that the repair agent can form a high-quality repair structure in the cracks and improve the repair quality and durability of the anti-buoyancy pile.

[0028] The defoamer can be an organosilicon defoamer (such as polydimethylsiloxane), and the amount added is 0.1%-0.3% of the total mass of the repair agent. It can destroy the surface tension of CO2 bubbles and accelerate their escape.

[0029] The defoamer can be a nonionic defoamer (such as fatty alcohol polyoxyethylene ether), which has better compatibility with the IPDI system and does not affect the curing speed;

[0030] The defoamer mentioned above needs to be premixed evenly with the IPDI material to avoid excessively high local concentrations that could lead to interface separation.

[0031] In the actual repair process, the pumping pressure of the mixture needs to be controlled at 0.2-0.5MPa. This ensures that the repair material fully fills the cracks and reduces CO2 gas retention and pore formation caused by high pressure. Experiments show that the porosity of the IPDI repair layer can be reduced from 15%-25% to 5%-8%, significantly improving compactness and impermeability.

[0032] As a further optimization of the present invention, the inner walls of the main repair tube, the annular connecting tube, and the thin repair tube are all coated with a self-cleaning nano-coating to ensure that no pipe blockage occurs during self-repair.

[0033] During the delivery of the repair agent, impurities may be adsorbed on the inner wall of the pipe or sediment may form due to the properties of the repair agent itself, leading to pipe blockage and affecting the repair effect. The presence of a self-cleaning nano-coating can effectively prevent this from happening. The nano-coating has a special microstructure that makes it difficult for impurities to adhere to the inner wall of the pipe. Even if a small amount of impurities are present, they can be washed away during the flow of the repair agent, ensuring that the repair pipe remains unobstructed and that the repair agent can reach the crack smoothly, thus improving the reliability and stability of the self-repairing system.

[0034] As a further optimization of the present invention, a sensor network for detecting crack propagation and location is arranged on the repaired pipe. The sensor network includes piezoelectric thin film sensors and fiber optic grating sensors.

[0035] Piezoelectric thin-film sensors are highly sensitive to vibration signals caused by crack propagation. Once a crack begins to expand, it can quickly detect it and send a signal. Meanwhile, fiber optic grating sensors detect the presence and location of cracks by monitoring fiber strain. When these two sensors are used in combination, they can detect microcracks as small as 0.01 mm, far earlier than cracks larger than 0.3 mm that can be detected by manual inspection. This early warning function allows staff to take timely measures to prevent further crack expansion, reducing foundation treatment costs. At the same time, compared with traditional manual inspection, it greatly shortens risk response time, improves construction efficiency, and shortens the construction period, bringing significant economic benefits and safety assurance to the project.

[0036] As a further optimization of the present invention, a piezoelectric thin film sensor is arranged at the intersection of the main repair pipe and the annular connecting pipe to detect vibration signals caused by crack propagation.

[0037] The piezoelectric thin film sensor is placed at the intersection of the main repair pipe and the annular connecting pipe because these locations are most sensitive to vibrations caused by crack propagation. When the crack propagates, the resulting vibrations are transmitted to the intersection through the repair pipe. The piezoelectric thin film sensor can capture these vibration signals in time and provide early warning for the system.

[0038] Fiber Bragg grating sensors are arranged on the main repair pipe at 500mm intervals, and adjacent fiber Bragg grating sensors are connected in series.

[0039] Fiber Bragg grating sensors are arranged in series on the main repair pipe every 500 mm. This layout can form a continuous monitoring line along the main repair pipe. When the crack causes the fiber to strain, the grating wavelength shifts. By analyzing the shift, the location of the crack can be accurately calculated with an error controlled within ±0.1 mm. This achieves high-precision positioning of the crack and provides an accurate basis for subsequent repair work.

[0040] The concrete structure of the anti-buoyancy pile is equipped with oblique optical fibers. By monitoring the strain difference caused by the change in the angle between the optical fiber and the crack, parameters such as the frequency shift and phase change of the optical signal in the optical fiber are monitored. The crack width and location are accurately calculated with an error controllable within ±0.1mm, achieving millimeter-level crack positioning. Using fiber optic grating sensors, the local strain changes caused by crack expansion are detected. Wireless communication technology is used to transmit the optical fiber sensing data to the cloud platform in real time for data analysis and remote control.

[0041] As a further optimization of the present invention, it also includes a micro hydraulic pump and a solenoid valve. The micro hydraulic pump is connected to the main inlet of the repair agent in the main repair pipe through the solenoid valve. The pumping force of the micro hydraulic pump drives the repair agent into the main repair pipe. The repair agent diffuses along the annular connecting pipe and the repair thin pipe and fills the deep crack.

[0042] The addition of a miniature hydraulic pump and solenoid valves makes the delivery of the repair agent more efficient and controllable. When the sensor detects a crack and triggers the repair system, the miniature hydraulic pump starts and uses pumping force to quickly press the repair agent into the main repair pipe. The solenoid valve controls the flow rate and direction of the repair agent, ensuring that the repair agent can accurately diffuse along the annular connecting pipe and the repair fine pipe and fill the deep cracks. This active delivery method of the repair agent, compared with simply relying on the pressure after the repair pipe ruptures, can deliver the repair agent to the depths of the crack more quickly and fully, improving the efficiency and quality of the repair and ensuring the structural safety of the anti-buoyancy pile.

[0043] A self-healing method for anti-buoyancy piles, the specific steps of which are as follows:

[0044] S1 formulates a corresponding design scheme for the anti-buoyancy pile self-repair system based on the surrounding environment, the water level of the anti-buoyancy piles, the self-weight and ballast of the superstructure, and the design of the anti-buoyancy piles.

[0045] S2 initially determined the design of the repair pipeline, constructed the repair pipeline through the pile body, and formulated a deployment plan for the anti-buoyancy pile self-repair system;

[0046] According to the deployment plan of the anti-buoyancy pile self-repair system, 6-8 repair main pipes are symmetrically arranged along the longitudinal direction of the pile body with a spacing of 80-100mm. Then, a ring connecting pipe is arranged between multiple repair main pipes, with a spacing of 200mm. Repair thin pipes are arranged on the ring connecting pipes and extend into the pile body.

[0047] S4 establishes a self-healing sensor network for anti-buoyancy piles. Piezoelectric film sensors are arranged at the intersection of the main repair pipe and the ring connecting pipe, and fiber optic grating sensors are deployed on the main repair pipe at 500mm intervals along the main repair pipe, with adjacent fiber optic grating sensors connected in series.

[0048] The S5 repair pipe uses a water-triggered curing polymer material. Before curing, it is a flexible hose, ensuring that it remains flexible during construction and can adapt to complex pipe layouts. Its flexibility ensures that the repair pipe itself will not be damaged during the pouring process. The end of the repair pipe is sealed with a film to prevent the end from being blocked. During the pouring process, the outer wall of the repair pipe is reliably bonded to the concrete. After water-triggered curing, it reaches a hard state and has a certain degree of rigidity and toughness, realizing the transformation from flexible to rigid and meeting the construction and functional requirements of the repair pipe.

[0049] When cracks appear inside the anti-buoyancy pile, the pipe wall of the repair pipeline ruptures when the external force gradually increases and reaches the critical point. The piezoelectric thin film sensor detects the vibration signal caused by the crack expansion. The crack also causes fiber strain and grating wavelength shift. The crack location is determined by the fiber optic grating sensor. The sensor signal is transmitted to the edge computing module. The algorithm eliminates noise interference and confirms the authenticity of the crack. After the control center receives the confirmation signal, the anti-buoyancy pile self-repair system is activated.

[0050] S7 activates the corresponding zone's micro hydraulic pump and solenoid valve, pressurizing the repair agent into the main repair pipe. The repair agent diffuses along the annular connecting pipe and the repair fine pipe, and simultaneously fills the deep cracks under pressure. The repair agent reacts with the groundwater in the cracks to form a dense structure, achieving self-repair.

[0051] The self-repairing system and method for anti-buoyancy piles proposed in this invention have the following beneficial effects:

[0052] (I) This invention involves setting up a repair pipe made of a water-triggered curing polymer material inside the anti-buoyancy pile. When cracks appear in the pile, the repair pipe ruptures under pressure, and the repair agent seeps into the crack and reacts with groundwater to cure, automatically repairing the crack. This effectively reduces the crack rate of the anti-buoyancy pile, avoids the expansion of cracks leading to overall or partial failure of the anti-buoyancy pile, ensures the safety and stability of the building, reduces problems such as cracking and water seepage in the basement floor caused by the failure of the anti-buoyancy pile, reduces related economic losses, reduces the repair cost of anti-buoyancy pile cracks, and can also avoid the problem of overall or partial anti-buoyancy failure. It meets the requirements of high speed and high standards in engineering construction and has broad market prospects.

[0053] (ii) The present invention completes the repair work inside the pile body, without the need for large equipment to enter the site for drilling and grouting operations, which reduces the construction difficulty, reduces the impact on the foundations of surrounding existing buildings, avoids construction suspension due to repair work, shortens the construction period, thereby reducing the construction and operation costs of the project and improving the overall efficiency of the project construction.

[0054] (iii) Manual repair can usually only repair cracks with a width > 5 mm, and is subject to great environmental limitations and has a long repair cycle. This invention can repair cracks with a penetration depth of 15 mm and a width ≤ 2 mm, and can respond within ten minutes, which greatly improves the repair efficiency and further avoids the danger of crack expansion.

[0055] (iv) Manual external repair methods are required for cases with deep crack penetration, such as widening the crack and local excavation for dewatering. The actual operation is quite complicated. In contrast, this invention repairs pipes by water-triggered curing, ensuring the integrity of the entire repaired pipe system during the pouring process. It is suitable for self-repair work in complex environments such as high water levels and corrosive environments, avoiding the need for excavation and dewatering in special environments.

[0056] (v) By arranging a sensor network including piezoelectric thin film sensors and fiber optic grating sensors on the repair pipeline, with the piezoelectric thin film sensors arranged at the intersection of the main repair pipe and the ring connecting pipe to detect the vibration signal of crack propagation, and the fiber optic grating sensors arranged in series every 500 mm on the main repair pipe, the crack location can be accurately calculated with an error controlled within ±0.1 mm. This high-precision crack location allows the repair system to quickly determine the crack location and deliver the repair agent in a targeted manner, improving repair efficiency. Compared with traditional manual detection and repair, it greatly shortens the time for crack detection and repair and reduces the cost of foundation treatment.

[0057] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the anti-buoyancy pile self-repair system provided by the present invention;

[0059] Figure 2 For the present invention Figure 1 A partially enlarged structural diagram;

[0060] Figure 3 This is a flowchart illustrating the self-repairing method for anti-buoyancy piles provided by the present invention.

[0061] Attached diagrams: 1. Main pipe for repair; 2. Circular connecting pipe; 3. Thin pipe for repair; 4. Anti-buoyancy pile body. Detailed Implementation

[0062] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0063] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0064] In the field of construction engineering, especially in the construction of underground structures, the stability of anti-buoyancy piles is crucial. With the development of urban construction and the increasing use of underground space, anti-buoyancy piles face increasingly greater challenges, such as cracking caused by the buoyancy of groundwater. The self-repairing system and method for anti-buoyancy piles of this invention aim to solve these problems, and its specific implementation is as follows:

[0065] Based on the waterproofing level of the anti-buoyancy piles in the surrounding environment, the self-weight and counterweight of the superstructure, and the design requirements of the anti-buoyancy piles, a comprehensive and targeted design scheme for the self-repairing system of the anti-buoyancy piles was developed. In this scheme, key elements such as the layout of the repair pipeline, the setting of sensors, and the installation positions of the micro hydraulic pump and solenoid valve were clearly defined. The design blueprint of the repair pipeline was initially determined, and the direction, quantity, and connection method of the main repair pipe 1, the ring connecting pipe 2, and the repair thin pipe 3 were planned. A repair pipeline system that runs through the anti-buoyancy pile body 4 was constructed, and a detailed deployment plan for the self-repairing system of the anti-buoyancy piles was developed.

[0066] like Figure 1 and Figure 2 As shown, according to the deployment plan, the repair pipes are installed inside the anti-buoyancy pile body 4. 6-8 repair main pipes 1 are symmetrically arranged along the longitudinal direction of the pile body. The spacing between two adjacent repair main pipes 1 is controlled at 80-100mm. This layout can ensure that the repair agent is evenly distributed inside the pile body, effectively covering the area where cracks may occur, while taking into account both cost and construction difficulty.

[0067] A ring-shaped connecting pipe 2 is arranged between multiple repair main pipes 1. Two adjacent ring-shaped connecting pipes 2 are parallel to each other and spaced 200mm apart. The ring-shaped connecting pipe 2 coincides with the axis of the anti-buoyancy pile body 4 and is parallel to the axis of the repair main pipe 1. Each ring-shaped connecting pipe 2 is composed of multiple arc-shaped pipes. Each arc-shaped pipe is set between two adjacent repair main pipes 1. Its two ends are fixed and sealed with the reserved installation holes on the adjacent repair main pipes 1 to form a connected network, ensuring that the repair agent can be uniformly transmitted between different repair main pipes 1.

[0068] Multiple repair tubes 3 are arranged on the annular connecting pipe 2. These repair tubes 3 are evenly distributed and interconnected, with their free ends extending into the interior of the anti-buoyancy pile body 4, so as to accurately deliver the repair agent to the crack.

[0069] Establishing a self-healing sensor network for anti-buoyancy piles is a key step in achieving automatic monitoring and repair.

[0070] A piezoelectric thin film sensor is arranged at the intersection of the main repair pipe 1 and the annular connecting pipe 2 to detect the vibration generated when the crack expands, taking advantage of its high sensitivity to vibration signals.

[0071] Fiber Bragg grating sensors are deployed at 500mm intervals on the main repair pipe 1. Adjacent fiber Bragg grating sensors are connected in series. The fiber strain is monitored by the fiber Bragg grating sensors. When the crack causes the fiber strain, the grating wavelength shifts, thereby resolving the location of the crack and achieving high-precision positioning of the crack. The error can be controlled within ±0.1mm.

[0072] In addition, oblique optical fibers are laid in the concrete structure of the anti-buoyancy pile body 4. By monitoring the strain difference caused by the change in the angle between the optical fiber and the crack, combined with fiber optic grating sensors, the crack width and location are accurately calculated. The optical fiber sensing data is transmitted to the cloud platform in real time using wireless communication technology for data analysis and remote control.

[0073] The repaired pipe uses a water-triggered curing polymer material. Before curing, it is a flexible hose. This flexibility allows the pipe to adapt to complex layouts during construction and avoids damage during concrete pouring. The end of the repaired pipe is sealed with a membrane to prevent blockage during construction. When the concrete is poured, the repaired pipe comes into contact with the concrete slurry. Due to the characteristics of the water-triggered curing polymer material, it undergoes chemical cross-linking and hardening upon contact with water, achieving a compressive strength of 30-50 MPa, thus realizing the transformation from flexibility to rigidity. At this point, the outer wall of the repaired pipe is reliably bonded to the concrete, possessing a certain degree of rigidity and toughness, meeting the construction and functional requirements of the repaired pipe.

[0074] Meanwhile, the inner walls of the main repair pipe 1, the annular connecting pipe 2, and the thin repair pipe 3 are all coated with a self-cleaning nano-coating to prevent impurities from adhering and causing blockage during the transmission of the repair agent, ensuring that the repair pipeline remains unobstructed at all times.

[0075] The repair agent used to repair the pipe is a mixture of isocyanate IPDI and defoamer. The defoamer can be an organosilicon defoamer such as polydimethylsiloxane or a nonionic defoamer such as fatty alcohol polyoxyethylene ether. The amount added is 0.1%-0.3% of the total mass of the repair agent. It needs to be premixed evenly with IPDI material to avoid excessive local concentration that may lead to interface separation.

[0076] In the actual repair process, the pumping pressure of the mixture is controlled at 0.2-0.5MPa. This ensures that the repair material fully fills the cracks, reduces CO2 gas retention and pore formation caused by high pressure, and improves the compactness and impermeability of the repair layer.

[0077] The self-healing system works as follows:

[0078] Crack Detection and System Activation: When cracks appear inside the anti-buoyancy pile, the development of the cracks will gradually increase the external force on the wall of the repair pipe. When the external force reaches the critical value, the repair pipe will rupture. At this time, the piezoelectric thin film sensor detects the vibration signal caused by the crack expansion. At the same time, the crack causes fiber optic strain, which causes the grating wavelength of the fiber Bragg grating sensor to shift. These sensor signals are transmitted to the edge computing module. After noise interference is eliminated by the algorithm and the authenticity of the crack is confirmed, the signal is transmitted to the control center. After receiving the confirmation signal, the control center activates the anti-buoyancy pile self-repair system.

[0079] After the anti-buoyancy pile self-healing system is started, the micro hydraulic pumps and solenoid valves of the corresponding zones are turned on. The micro hydraulic pumps drive the repair agent into the main repair pipe 1 through pumping force. The solenoid valves control the flow rate and direction of the repair agent to ensure that the repair agent diffuses along the annular connecting pipe 2 and the repair thin pipe 3. Under pressure, the repair agent fills into the deep cracks, reacts with the groundwater in the cracks, generates a polyurea structure and releases CO2 gas, forming a dense structure to achieve anchoring and strengthening of the cracks, thereby repairing the cracks inside the anti-buoyancy pile body 4. During the repair process, by controlling the pumping pressure, it is ensured that the repair agent fully fills the cracks, while reducing the formation of pores and improving the repair quality.

[0080] System Reset and Recording: After the repair is completed, the repair effect is checked. If the crack is found to have been successfully repaired, the system is reset and waits for the next possible crack monitoring and repair. If the crack is found to have not been successfully repaired, the pumping pressure of the micro hydraulic pump is increased and the repair agent is pumped again. The operation can be repeated. Throughout the process, the system will record logs, including the time and location of the crack, the repair process, and other information, so as to facilitate subsequent evaluation and analysis of the project quality.

[0081] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A self-repairing system for anti-float piles comprising an anti-float pile body (4), characterized in that, The inside of the anti-floating pile body (4) is provided with a repair pipeline for transmitting a repair agent, the repair pipeline is made of a water-triggered solidified polymer material, and the repair pipeline is solidified by contacting with concrete slurry during concrete pouring; The repair pipeline comprises a repair main pipe (1), an annular connecting pipe (2), and repair fine pipes (3); The number of the repair main pipes (1) is multiple, and the repair main pipes (1) are longitudinally arranged in the anti-floating pile body (4) and are annularly and symmetrically distributed along the axis of the anti-floating pile body (4); The annular connecting pipes (2) are installed between and communicated with the multiple repair main pipes (1), the number of the annular connecting pipes (2) is multiple, and the annular connecting pipes (2) are uniformly distributed along the axis direction of the anti-floating pile body (4); The repair fine pipes (3) are installed on and communicated with the annular connecting pipes (2), the number of the repair fine pipes (3) is multiple, and the repair fine pipes (3) are uniformly distributed, and the free ends of the repair fine pipes (3) extend into the inside of the anti-floating pile body (4); When a crack occurs in the inside of the anti-floating pile body (4), the external force on the wall of the repair pipeline gradually increases, and the repair pipeline is broken when the external force reaches a critical value, under the action of the internal pressure of the repair pipeline, the repair agent rapidly penetrates into the deep part of the crack through the broken part and is triggered to solidify with underground water, thereby realizing automatic repair of the crack in the inside of the anti-floating pile body (4); The repair agent in the repair pipeline is a mixed material of isocyanate and a defoaming agent; A sensor network for detecting crack expansion and position is arranged on the repair pipeline, the sensor network comprises piezoelectric film sensors and fiber grating sensors; The piezoelectric film sensors are arranged at the intersection nodes of the repair main pipes (1) and the annular connecting pipes (2) and are used for detecting vibration signals caused by crack expansion; The fiber grating sensors are arranged on the repair main pipes (1) and are arranged at intervals of 500 mm, and two adjacent fiber grating sensors are connected in series; The anti-floating pile self-repairing system further comprises a micro hydraulic pump and an electromagnetic valve, the micro hydraulic pump is connected with a main repair agent inlet of the repair main pipe (1) through the electromagnetic valve, the repair agent is driven into the repair main pipe (1) through the pumping force of the micro hydraulic pump, and the repair agent diffuses along the annular connecting pipes (2) and the repair fine pipes (3) and fills deep cracks.

2. The anti-floating pile self-repairing system according to claim 1, characterized in that, The number of the repair main pipes (1) is 6-8, and the distance between two adjacent repair main pipes (1) is 80-100 mm.

3. The anti-floating pile self-repairing system according to claim 1, wherein, Two adjacent annular connecting pipes (2) are parallel to each other and are spaced apart by 200 mm.

4. The anti-float pile self-repairing system according to claim 1, wherein, The annular connecting pipes (2) coincide with the axis of the anti-floating pile body (4) and are parallel to the axis of the repair main pipes (1), the annular connecting pipes (2) comprise multiple arc-shaped pipes, each arc-shaped pipe is arranged between two adjacent repair main pipes (1), and the two ends of each arc-shaped pipe are fixed to and sealed with the reserved mounting holes on the adjacent repair main pipes (1).

5. The anti-float pile self-repairing system according to claim 1, wherein, The inner walls of the repair main pipes (1), the annular connecting pipes (2), and the repair fine pipes (3) are provided with self-cleaning nano coatings.

6. A method for self-repairing of anti-float pile, which adopts the self-repairing system of anti-float pile according to any one of claims 1-5, characterized in that, The specific steps are as follows: S1, according to the water level of the surrounding environment anti-floating pile, the self-weight and pressure weight of the superstructure, and the anti-floating pile design, a corresponding anti-floating pile self-repairing system design scheme is formulated; S2, the design of the repair pipeline is initially determined, the repair pipeline penetrating through the pile body is constructed, and an anti-floating pile self-repairing system deployment scheme is formulated; S3 According to the anti-floating pile self-repairing system deployment scheme, 6-8 repair main pipes are arranged symmetrically along the longitudinal direction of the pile body with a spacing of 80-100 mm, then annular connecting pipes are arranged between the multiple repair main pipes, and are arranged at intervals of every 200 mm, repair fine pipes are arranged on the annular connecting pipes and extend to the inside of the pile body; S4 An anti-floating pile self-repairing sensor network is established, piezoelectric film sensors are arranged at the intersection nodes of the repair main pipes and the annular connecting pipes, fiber Bragg grating sensors are arranged on the repair main pipes at intervals of every 500 mm, and are connected in series between two adjacent fiber Bragg grating sensors; S5 The repair pipeline is made of a water-triggered solidified polymer material, which is a flexible rubber pipe before solidification, ensuring flexibility during construction and adapting to complex pipeline layout. The flexibility ensures that the repair pipeline itself will not be damaged during pouring. The end of the repair pipeline is sealed with a film to prevent the end from being blocked. The outer wall of the repair pipeline is reliably bonded to the concrete during pouring. After being triggered to solidify by water, it reaches a hard state with certain rigidity and toughness, realizing the transition from flexibility to rigidity and meeting the construction and functional requirements of the repair pipeline; S6 When a crack appears inside the anti-floating pile, the pipe wall of the repair pipeline breaks when the external force gradually increases and reaches the critical external force. The piezoelectric film sensor detects the vibration signal caused by the crack expansion. The crack also causes fiber strain, and the grating wavelength shifts. The crack position is analyzed by the fiber Bragg grating sensor. The sensor signal is transmitted to the edge computing module. The algorithm excludes noise interference and confirms the authenticity of the crack. After receiving the confirmation signal, the control center opens the anti-floating pile self-repairing system; S7 Start the micro hydraulic pump and electromagnetic valve corresponding to the partition, drive the repair agent into the repair main pipe under pressure, and diffuse along the annular connecting pipe and repair fine pipe. At the same time, it is filled into the deep crack under the action of pressure, and the repair agent reacts with the groundwater in the crack to form a dense structure, realizing self-repairing.

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