Anti-floating pile self-repairing system and method thereof

Abstract

The invention relates to the technical field of constructional engineering, and discloses an anti-floating pile self-repairing system which comprises an anti-floating pile body, a repairing pipeline used for conveying a repairing agent is arranged in the anti-floating pile body, the repairing pipeline is made of a water-triggered curing polymer material, and the repairing pipeline is in contact with concrete slurry to be cured during concrete pouring. The repairing pipeline is broken under the action of pressure, the repairing agent permeates into the crack and reacts with underground water to be cured, the crack is automatically repaired, the crack rate of the anti-floating pile body is effectively reduced, overall or local failure of the anti-floating pile caused by crack expansion is avoided, safety and stability of a building are guaranteed, and the service life of the building is prolonged. The problems of basement bottom plate cracking, water seepage and the like caused by failure of the anti-floating piles are solved, related economic losses are reduced, the maintenance cost of cracks of the anti-floating piles is reduced, the problem of overall or local anti-floating failure can be avoided, the requirements of high speed and high standard of engineering construction are met, and the anti-floating pile has wide market prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and particularly to an anti-floating pile self-repair system and method thereof. Background Art

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

[0003] However, during the project construction period, due to the long-term action of groundwater buoyancy on the anti-floating piles and the possible disturbance factors during the construction process, cracks in the anti-floating piles often occur.

[0004] Traditional anti-floating piles lack effective self-repair ability. Once cracks appear, only manual repair can be relied on. In this large commercial complex project, the basement area reaches tens of thousands of square meters and the number of anti-floating piles is numerous. Manual detection of cracks not only requires a large amount of manpower and time, but also it is difficult to comprehensively and timely detect all cracks. Some tiny cracks are not detected in time, and these undetected cracks gradually expand under the subsequent erosion of groundwater, ultimately affecting the overall performance of the anti-floating piles;

[0005] When cracks in the anti-floating piles are found, the traditional repair method is to carry out manual drilling and grouting. In the construction environment in the city center, the site is narrow and there are dense surrounding buildings, and the construction space is limited. When carrying out drilling and grouting operations, large equipment needs to enter the site, which not only increases the construction difficulty, but also may affect the foundations of the surrounding existing buildings. At the same time, the drilling and grouting operations need to suspend the construction in the relevant area, which further prolongs the overall project duration;

[0006] If the cracks in the anti-floating piles are not repaired in a timely and effective manner, over time, the cracks will continue to expand, and ultimately may lead to the overall or partial failure of the anti-floating piles. In this commercial complex project, if some anti-floating piles fail, the pressure borne by the basement floor will be uneven, which will in turn cause problems such as floor cracking and water seepage. Once water seepage occurs in the basement, 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 operations of the merchants in the commercial complex, leading to economic disputes. Moreover, the cost of repairing the water seepage problem is extremely high, and a series of complex works such as plugging and drainage need to be carried out, further increasing the construction and operation costs of the project.

[0007] Therefore, this application proposes an anti-floating pile self-repair system and method thereof. Summary of the Invention

[0008] To solve the technical problems existing in the background art, the present invention proposes an anti-floating pile self-repair system and its method.

[0009] An anti-floating pile self-repair system proposed by the present invention includes an anti-floating pile body. A repair pipeline for transmitting a repair agent is arranged inside the anti-floating pile body. The repair pipeline is made of a water-triggered curing polymer material and cures when contacting concrete slurry during concrete pouring.

[0010] Before curing, it is a flexible rubber hose, ensuring softness during construction to adapt to complex pipeline layouts. The flexibility ensures that the repair pipe itself will not be damaged during pouring. After pouring, due to the characteristics of the water-triggered curing polymer material, the flexible hose remains elastic in the dry state and hardens through chemical cross-linking when encountering water. The compressive strength can reach 30 - 50 MPa. During the pouring process, the outer wall of the repair pipe is reliably bonded to the concrete and reaches a hard state after water-triggered curing, having a certain stiffness and toughness, realizing the transformation from flexible to rigid and meeting the construction and functional requirements of the repair pipe.

[0011] Specifically, the water-triggered curing polymer material includes water-curing polyurethane (PUA) and reinforcing fibers. The isocyanate group (-NCO) in the polyurethane prepolymer reacts with water to form a polyurea network, while releasing CO2 to form a dense structure. The flexible hose remains elastic in the dry state and hardens through chemical cross-linking when encountering water, and the compressive strength can reach 30 - 50 MPa.

[0012] The repair pipeline includes a repair main pipe, an annular connecting pipe, and a repair thin pipe.

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

[0014] The repair main pipe is the main component of the repair pipeline system. The multiple repair main pipes are longitudinally arranged and symmetrically distributed in a ring along the axis of the anti-floating pile body. Such a layout can ensure the effective transmission of the repair agent in all parts of the pile body. The symmetrical distribution in a ring enables the repair agent to be evenly dispersed into different areas inside the pile body, avoiding repair blind spots.

[0015] For example, when a crack appears in a certain part of the pile body, no matter which direction the crack is located in the pile body, there will be a corresponding repair main pipe to timely transport the repair agent, improving the comprehensiveness and reliability of self-repair.

[0016] The annular connecting pipe is installed between multiple repair main pipes and is interconnected. The number of annular connecting pipes is multiple and they are evenly distributed along the axis direction of the anti-floating pile body.

[0017] The annular connecting pipe plays a role in connecting each repair main pipe, making the entire repair pipeline system form a connected repair pipe network. Multiple annular connecting pipes are evenly distributed along the axis of the pile body, further enhancing the transmission capacity of the repair agent in the pile body. It can not only laterally transfer the repair agent in the repair main pipe to make the repair agent more evenly distributed, but also balance the pressure between the repair main pipes to a certain extent, ensuring the stable flow of the repair agent in the entire system. When cracks appear in the area near a certain repair main pipe and more repair agent is needed, the annular connecting pipe can timely allocate the repair agent from other repair main pipes to ensure the smooth progress of the repair work;

[0018] The repair capillary pipes are installed on the annular connecting pipe and are interconnected. The number of repair capillary pipes is multiple and evenly distributed, and the free ends of the repair capillary pipes extend towards the inside of the anti-floating pile body;

[0019] The repair capillary pipes are the key channels for the repair agent to finally reach the cracks. They are evenly distributed on the annular connecting pipe, and the free ends extend towards the inside of the pile body, and can penetrate into the fine cracks inside the pile body. Due to the uncertainty of the generation position and size of the cracks, the evenly distributed repair capillary pipes can cover the areas where cracks may appear inside the pile body to the greatest extent. When the repair main pipe and the annular connecting pipe transport the repair agent, the repair capillary pipes can accurately deliver the repair agent to the cracks, realizing the effective repair of the cracks and improving the accuracy of self-repair;

[0020] When cracks appear inside the anti-floating pile body, the external force on the wall of the repair pipeline gradually increases and breaks when the external force reaches the critical value. Under the internal pressure of the repair pipeline, the repair agent quickly penetrates deep into the cracks through the rupture and triggers curing with groundwater, realizing the automatic repair of the cracks inside the anti-floating pile body. This automatic repair mechanism does not require manual intervention, can timely handle the cracks, effectively reduces the crack rate of the anti-floating pile body, avoids the overall or partial failure of the anti-floating pile caused by the further expansion of the cracks, greatly reduces the maintenance cost, and ensures the safety and stability of the building.

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

[0022] Through a large number of experiments and engineering practice verification, setting the number of repair main pipes to 6 - 8 and controlling the adjacent distance to be 80 - 100 mm can balance the cost and construction difficulty while ensuring the repair effect. If the number of repair main pipes is too small or the distance is too large, it may lead to some areas not being able to get the repair agent in time, affecting the comprehensiveness of the repair. While if the number is too large or the distance is too small, it will increase the material cost and construction complexity. Such an optimized design not only ensures that the repair agent can evenly cover the inside of the pile body, but also guarantees the economy and operability of the system.

[0023] As a further optimized solution of the present invention, the adjacent two annular connecting pipes are parallel to each other and spaced 200 mm apart, which can ensure the uniform transmission of the repair agent between the repair main pipes at different heights. This spacing can not only ensure that there is enough space between the annular connecting pipes to accommodate the flow of the repair agent, but also ensure their connection and support effects on the repair main pipes. 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 the structure to be too complex, which helps to improve the performance of the entire repair system.

[0024] As a further optimized solution of the present invention, the axis of the annular connecting pipe coincides with the axis of the anti-floating pile body and is parallel to the axis of the repair main pipe. The annular connecting pipe includes a plurality of arc-shaped pipes, each arc-shaped pipe is respectively arranged 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 in the pile body more regular, which is beneficial to the uniform distribution and flow of the repair agent. It can not only effectively prevent the leakage of the repair agent, but also enhance the stability of the entire repair pipeline system, ensuring that the repair pipeline can continue to work normally during the use of the anti-floating pile.

[0026] As a further optimized solution of the present invention, the repair agent in the repair pipeline is a mixed material 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 release 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, which can adapt to the small deformation of cracks, can react quickly with the groundwater in the cracks, effectively fill and repair the cracks. Adding a defoamer is to prevent excessive bubbles from being generated during the reaction of the repair agent with groundwater. Excessive bubbles will affect the structural strength and compactness of the cured repair agent, reducing the repair effect. The selection of this mixed material fully considers the chemical reaction characteristics and actual needs during the repair process, ensuring that the repair agent can form a high-quality repair structure in the cracks, improving the repair quality and durability of the anti-floating pile;

[0028] The defoamer can be a silicone-based defoamer (such as polydimethylsiloxane), and the addition amount is 0.1% - 0.3% of the total mass of the repair agent, which can break the surface tension of the CO2 bubbles and accelerate their escape;

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

[0030] The above defoamer needs to be premixed evenly with the IPDI material to avoid interfacial separation caused by excessive local concentration;

[0031] During the actual repair process, the pumping pressure of the mixture needs to be controlled at 0.2 - 0.5 MPa, which can not only ensure that the repair material fully fills the cracks, but also reduce the retention of CO2 gas and pore generation 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 the compactness and impermeability.

[0032] As a further optimized solution of the present invention, the inner walls of the repair main pipe, the annular connecting pipe and the repair fine pipe all have self-cleaning nano-coatings to ensure that there is no pipe blockage problem during self-repair;

[0033] During the transmission of the repair agent, impurities may be adsorbed on the inner wall of the pipeline or precipitation may occur due to the characteristics of the repair agent itself, resulting in pipeline blockage and affecting the repair effect. The presence of the self-cleaning nano-coating can effectively prevent this situation. The nano-coating has a special microstructure, making it difficult for impurities to adhere to the inner wall of the pipeline. Even if there are a small amount of impurities, they can be washed away during the flow of the repair agent, ensuring that the repair pipeline always remains unobstructed, guaranteeing that the repair agent can reach the crack smoothly, and improving the reliability and stability of the self-repair system.

[0034] As a further optimized solution of the present invention, a sensor network for detecting crack propagation and location is arranged on the repair pipeline. The sensor network includes piezoelectric film sensors and fiber Bragg grating sensors;

[0035] The piezoelectric film sensor is very sensitive to the vibration signal caused by crack propagation. Once a crack starts to propagate, it can quickly detect it and send a signal. The fiber Bragg grating sensor senses the presence and location of the crack by monitoring the fiber strain. The integrated use of these two sensors can detect micro-cracks of 0.01 mm level, far earlier than cracks > 0.3 mm that can be detected by manual inspection. The early warning function enables the staff to take timely measures to avoid further expansion of the cracks, reducing the foundation treatment cost. At the same time, compared with traditional manual inspection, it greatly shortens the risk response time, improves the construction effect, shortens the construction period, and brings significant economic benefits and safety guarantees to the project construction.

[0036] As a further optimized solution of the present invention, the piezoelectric film sensor is arranged at the cross-junction of the repair main pipe and the annular connecting pipe to detect the vibration signal caused by crack propagation;

[0037] The piezoelectric thin film sensors are arranged at the cross nodes of the repaired main pipe and the annular connecting pipe because these positions are the most sensitive to the vibrations caused by crack propagation. When the crack propagates, the generated vibrations will be transmitted to the cross nodes through the repaired pipeline, and the piezoelectric thin film sensors can capture these vibration signals in a timely manner to provide early warning for the system;

[0038] The fiber Bragg grating sensors are arranged on the repaired main pipe and set at intervals of 500 mm, and are connected in series between adjacent two fiber Bragg grating sensors;

[0039] The fiber Bragg grating sensors are arranged on the repaired main pipe at intervals of 500 mm and connected in series. Such a layout can form a continuous monitoring line along the repaired main pipe. When the crack causes fiber strain, the grating wavelength shifts, and the position of the crack can be accurately calculated by analyzing the shift amount, with the error controllable within ±0.1 mm, achieving high-precision positioning of the crack and providing an accurate basis for subsequent repair work;

[0040] Oblique fibers are arranged in the concrete structure of the anti-floating pile body. By monitoring parameters such as the frequency shift and phase change of the optical signal in the fiber due to the strain difference caused by the change in the angle between the fiber and the crack, the crack width and position are accurately calculated, with the error controllable within ±0.1 mm, achieving millimeter-level positioning of the crack. Using the fiber Bragg grating sensors, the local strain changes caused by crack propagation are transmitted to the cloud platform in real time by wireless communication technology for data analysis and remote control.

[0041] As a further optimized solution of the present invention, it further includes a micro hydraulic pump and a solenoid valve. The micro hydraulic pump is connected to the main repair agent inlet of the repaired main pipe through the solenoid valve, and the repair agent is driven into the repaired main pipe by the pumping force of the micro hydraulic pump, and the repair agent diffuses along the annular connecting pipe and the repair fine pipe to fill the deep cracks;

[0042] The addition of the micro hydraulic pump and the solenoid valve makes the transportation of the repair agent more efficient and controllable. When the sensor detects a crack and triggers the repair system, the micro hydraulic pump starts, and the repair agent is quickly pressed into the repaired main pipe by the pumping force. The solenoid valve plays a role in controlling the flow rate and flow direction of the repair agent to ensure that the repair agent can accurately diffuse along the annular connecting pipe and the repair fine pipe and fill into the deep cracks. This active transportation method of the repair agent can deliver the repair agent to the deep part of the crack more quickly and fully compared to simply relying on the pressure after the repair pipeline ruptures, improving the repair efficiency and quality and ensuring the structural safety of the anti-floating pile.

[0043] A self-repair method for anti-floating piles, the specific steps are as follows:

[0044] S1 According to the anti-floating pile water level set for the surrounding environment, the self-weight and deadweight of the upper structure, and the anti-floating pile design, formulate a corresponding self-repair anti-floating pile system design scheme;

[0045] S2 Initially determine the design of the repair pipeline, construct the repair pipeline that penetrates the pile body, and formulate a deployment plan for the self-repair system of the anti-floating pile;

[0046] S3 According to the deployment plan of the anti-floating pile system, symmetrically arrange 6-8 repair main pipes longitudinally along the pile body at an interval of 80-100 mm, then arrange annular connecting pipes between multiple repair main pipes, and arrange them at intervals of 200 mm. Arrange self-repairing capillary pipes on the annular connecting pipes and extend them into the pile body;

[0047] S4 Establish a self-repair sensor network for anti-floating piles. At the cross-nodes of the repair main pipes and the annular connecting pipes, arrange piezoelectric film sensors, and deploy fiber Bragg grating sensors on the repair main pipes, arranging them at intervals of 500 mm along the repair main pipes, and connecting them in series between adjacent two fiber Bragg grating sensors;

[0048] S5 The repair pipeline uses a water-triggered curable polymer material, which is a flexible rubber hose before curing, ensuring that it remains soft during construction to adapt to complex pipeline layouts. The flexibility ensures that the repair pipe itself will not be damaged during the pouring process. The end of the pipeline is blocked 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 being triggered by water and cured, it reaches a hard state, with a certain stiffness and toughness, realizing the transformation from flexible to rigid, and meeting the construction and functional requirements of the repair pipe;

[0049] S6 When cracks appear inside the anti-floating pile, the pipe wall of the repair pipeline gradually increases in external force, and when the external force reaches the critical value, it breaks. The piezoelectric film sensor detects the vibration signal caused by the crack propagation. The crack will also cause fiber strain and the grating wavelength to shift. The crack position is analyzed through the fiber Bragg grating sensor, and the sensor signal is transmitted to the edge computing module. Through the algorithm, noise interference is excluded and the authenticity of the crack is confirmed. After the control center receives the confirmation signal, the self-repair system of the anti-floating pile is activated;

[0050] S7 Start the micro hydraulic pump and solenoid valve in the corresponding area. The pressure drives the repair agent into the repair main pipe. The repair agent diffuses along the annular connecting pipe and the repair capillary pipe, and at the same time, it is filled into the deep cracks under the pressure drive. The repair agent reacts with the groundwater in the cracks to form a dense structure, realizing self-repair.

[0051] The self-repair system and method of the anti-floating pile proposed by the present invention have the following beneficial effects:

[0052] (1) In the present invention, a repair pipeline made of a water-triggered curable polymer material is arranged inside the anti-floating pile body. When cracks appear in the pile body, the repair pipeline ruptures under pressure, and the repair agent penetrates into the cracks and reacts with groundwater to solidify, automatically repairing the cracks. This effectively reduces the crack rate of the anti-floating pile body, avoids the overall or partial failure of the anti-floating pile caused by the expansion of cracks, ensures the safety and stability of the building, reduces problems such as cracking and water seepage of the basement floor caused by the failure of the anti-floating pile, reduces the related economic losses, reduces the maintenance cost of the anti-floating pile cracks, and can also avoid the problem of overall or partial anti-floating failure, meeting the requirements of high speed and high standards in engineering construction, and having a broad market prospect;

[0053] (2) 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, reducing the construction difficulty, reducing the impact on the foundations of surrounding existing buildings, avoiding construction suspension caused by the repair work, shortening the construction period, thereby reducing the construction and operation costs of the project and improving the overall efficiency of engineering construction;

[0054] (3) Manpower can usually only repair cracks with a width > 5 mm, and is greatly restricted by the environment with a long repair cycle. The present invention can repair cracks with a penetration depth of 15 mm and a width ≤ 2 mm, and can respond within ten minutes, greatly improving the repair efficiency and further avoiding the danger of crack expansion;

[0055] (4) For the case of deep crack penetration depth, the external repair method by manpower requires methods such as expanding the gap for treatment, and also faces situations such as local excavation and dewatering treatment externally, with relatively complex actual operations. However, the present invention ensures the integrity of the entire repair pipeline system during the pouring process through the water-triggered curable repair pipe, is applicable to self-repair work in complex environments such as high water levels and corrosiveness, and avoids situations such as excavation and dewatering in special environments;

[0056] (5) By arranging a sensor network including a piezoelectric film sensor and a fiber Bragg grating sensor on the repair pipeline, the piezoelectric film sensor is arranged at the cross-node of the main repair pipe and the annular connecting pipe to detect crack expansion vibration signals. The fiber Bragg grating sensors are arranged in series on the main repair pipe every 500 mm, and the crack position can be accurately calculated with an error controlled within ±0.1 mm. This high-precision crack positioning enables the repair system to quickly determine the crack position, deliver the repair agent targeted, improve the repair efficiency, and greatly shorten the time for detecting and repairing cracks compared with traditional manual detection and repair, reducing the foundation treatment cost.

[0057] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 Schematic structural diagram of the anti-floating pile self-repair system provided by the present invention;

[0059] Figure 2 For the present invention Figure 1 Partial enlarged structural schematic diagram;

[0060] Figure 3 Schematic flow chart of the anti-floating pile self-repair method provided by the present invention.

[0061] Description of the drawings: 1. Repair main pipe; 2. Annular connecting pipe; 3. Repair thin pipe; 4. Anti-floating pile body. Detailed implementation manners

[0062] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar symbols represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0063] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0064] In the field of construction engineering, especially in the construction of underground structures, the stability of anti-floating piles is crucial. With the development of urban construction and the increasing utilization of underground space, anti-floating piles are facing more and more challenges, such as cracking problems caused by groundwater buoyancy. The anti-floating pile self-repair system and method of the present invention aim to solve these problems, and the specific implementation manners are as follows:

[0065] According to the anti-floating pile waterproof level of the project's surrounding environment, the self-weight and counterweight of the upper structure, and the design requirements of the anti-floating piles, formulate a comprehensive and highly targeted design plan for the self-repair anti-floating pile system. In this plan, clarify key elements such as the layout of the repair pipelines, the setting of sensors, and the installation positions of the micro hydraulic pumps and solenoid valves, initially determine the design blueprint of the repair pipelines, plan the directions, quantities and connection methods of the repair main pipe 1, annular connecting pipe 2 and repair thin pipe 3, construct a repair pipeline system that penetrates the anti-floating pile body 4, and formulate a detailed deployment plan for the anti-floating pile self-repair system.

[0066] As shown in the figure and Figure 2 as shown, according to the deployment plan, the repair pipeline is installed inside the anti-floating pile body 4. 6 - 8 repair main pipes 1 are symmetrically arranged longitudinally along the pile body, and the distance between two adjacent repair main pipes 1 is controlled within 80 - 100 mm. Such a layout can ensure the uniform distribution of the repair agent inside the pile body, effectively cover the areas where cracks may occur, and take into account both cost and construction difficulty;

[0067] Annular connecting pipes 2 are arranged between multiple repair main pipes 1. Two adjacent annular connecting pipes 2 are parallel to each other and spaced 200 mm apart. 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. Each annular connecting pipe 2 is composed of multiple arc-shaped pipes. Each arc-shaped pipe is respectively arranged between two adjacent repair main pipes 1, and 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 evenly transmitted between different repair main pipes 1;

[0068] Multiple repair fine pipes 3 are arranged on the annular connecting pipes 2. These repair fine pipes 3 are evenly distributed and interconnected, and their free ends extend towards the inside of the anti-floating pile body 4 to accurately deliver the repair agent to the crack location.

[0069] Establish an anti-floating pile self-repair sensor network, which is the key link to achieve automatic monitoring and repair;

[0070] Piezoelectric film sensors are arranged at the cross nodes of the repair main pipes 1 and the annular connecting pipes 2. Utilizing their high sensitivity to vibration signals, the vibrations generated during crack propagation are detected;

[0071] Fiber Bragg grating sensors are deployed at intervals of 500 mm on the repair main pipes 1. Two adjacent fiber Bragg grating sensors are connected in series. By monitoring the fiber strain with the fiber Bragg grating sensors, when the crack causes fiber strain, the grating wavelength shifts, and thus the location of the crack is resolved to achieve high-precision positioning of the crack, with the error controllable within ±0.1 mm;

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

[0073] The repair pipeline uses a water-triggered curable polymer material. Before curing, it is a flexible rubber hose. This flexibility enables the pipeline to adapt to complex layouts during construction, avoiding damage during concrete pouring. The end of the pipeline is sealed with a thin film to prevent blockage during construction. When pouring concrete, the repair pipeline comes into contact with the concrete slurry. Due to the characteristics of the water-triggered curable polymer material, it undergoes chemical cross-linking and hardening when encountering water, and the compressive strength can reach 30 - 50 MPa, achieving a transformation from flexible to rigid. At this time, the outer wall of the repair pipe is reliably bonded to the concrete, having a certain stiffness and toughness, meeting the construction and functional requirements of the repair pipe;

[0074] Meanwhile, the inner walls of the main repair pipe 1, the annular connecting pipe 2, and the fine repair pipe 3 are all coated with a self-cleaning nano-coating to prevent blockage problems caused by impurity adhesion during the transmission of the repair agent, ensuring that the repair pipeline is always unobstructed;

[0075] The repair agent in the repair pipeline is a mixed material of isocyanate IPDI and a defoaming agent. The defoaming agent can be a silicone-based defoaming agent such as polydimethylsiloxane or a non-ionic defoaming agent such as fatty alcohol polyoxyethylene ether, and the addition amount is 0.1% - 0.3% of the total mass of the repair agent. It needs to be premixed evenly with the IPDI material to avoid interfacial separation caused by too high local concentration;

[0076] During the actual repair process, the pumping pressure of the mixture is controlled at 0.2 - 0.5 MPa, which can not only ensure that the repair material fully fills the cracks but also reduce the retention of CO2 gas and pore generation caused by high pressure, improving the density and impermeability of the repair layer.

[0077] The working process of the self-repair system is as follows:

[0078] Crack detection and system startup: When cracks appear inside the anti-floating pile, the development of the cracks will gradually increase the external force on the wall of the repair pipeline. When the external force reaches the critical value, the repair pipeline ruptures. At this time, the piezoelectric film sensor detects the vibration signal caused by crack propagation. At the same time, the crack causes strain in the optical fiber, causing the grating wavelength of the fiber Bragg grating sensor to shift. These sensor signals are transmitted to the edge computing module. After excluding noise interference through algorithms and confirming the authenticity of the cracks, the signals are transmitted to the control center. After receiving the confirmation signal, the control center starts the anti-floating pile self-repair system;

[0079] After the self-repair system of the anti-floating pile is activated, the micro hydraulic pump and solenoid valve in the corresponding partition are opened. The micro hydraulic pump drives the repair agent into the main repair pipe 1 through the pumping force. The solenoid valve controls the flow rate and flow direction of the repair agent to ensure that the repair agent diffuses along the annular connecting pipe 2 and the fine repair pipe 3. Under the action of 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, realizing the anchoring and strengthening of the cracks, thereby repairing the cracks inside the anti-floating 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 generation of pores and improving the repair quality;

[0080] System reset and recording: After the repair is completed, the repair effect is detected. If it is detected that the cracks have been successfully repaired, the system resets and waits for the next possible crack monitoring and repair. If it is detected that the cracks have not been successfully repaired, the pumping pressure of the micro hydraulic pump is increased, and the repair agent is pumped again. Repeating the operation is fine. During the whole process, the system will record logs, including information such as the time, location of the cracks, and the repair process, etc., for subsequent evaluation and analysis of the project quality.

[0081] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered within the protection scope of the present invention.

Claims

1. An anti-floating pile self-repairing system, comprising an anti-floating pile body (4), characterized in that, Inside the anti - floating pile body (4), there is a repair pipeline for transmitting the repair agent. The repair pipeline is made of a water - triggered curing polymer material and solidifies when it comes into contact with the concrete slurry during concrete pouring; The repair pipeline includes a repair main pipe (1), an annular connecting pipe (2), and a repair fine pipe (3); The number of repair main pipes (1) is multiple and they are longitudinally arranged inside the anti - floating pile body (4). The multiple repair main pipes (1) are symmetrically distributed in a ring along the axis of (4); The annular connecting pipes (2) are installed between the multiple repair main pipes (1) and are interconnected. The number of annular connecting pipes (2) is multiple and they are evenly distributed along the axis direction of the anti - floating pile body (4); The repair fine pipes (3) are installed on the annular connecting pipes (2) and are interconnected. The number of repair fine pipes (3) is multiple and they are evenly distributed. The free ends of the repair fine pipes (3) extend towards the inside of the anti - floating pile body (4); When cracks appear inside the anti - floating pile body (4), the external force on the pipe wall of the repair pipeline gradually increases and ruptures when the external force reaches the critical value. Under the internal pressure of the repair pipeline, the repair agent quickly penetrates deep into the cracks through the rupture and is triggered to solidify by groundwater, realizing the automatic repair of the cracks inside the anti - floating pile body (4).

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

3. The self-repairing system for anti-floating piles according to claim 1, characterized in that, Adjacent two annular connecting pipes (2) are parallel to each other and spaced 200 mm apart.

4. The self-repairing system for anti-floating piles according to claim 1, characterized in that, The annular connecting pipe (2) coincides with the axis of the anti - floating pile body (4) and is parallel to the axis of the repair main pipe (1). The annular connecting pipe (2) includes multiple arc - shaped pipes. Each arc - shaped pipe is respectively arranged between adjacent two repair main pipes (1), 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 (1).

5. The self-repairing system for anti-floating piles according to claim 1, wherein The repair agent inside the repair pipeline is a mixed material of isocyanate (IPDI) and defoamer.

6. The self-repairing system for anti-floating piles according to claim 1, characterized in that, The inner walls of the repair main pipe (1), the annular connecting pipe (2), and the repair fine pipe (3) all have self - cleaning nano - coatings.

7. The self-repairing system for anti-floating piles according to claim 1, wherein, A sensor network for detecting crack propagation and location is arranged on the repair pipeline. The sensor network includes piezoelectric film sensors and fiber Bragg grating sensors.

8. The self - repairing system for anti - floating piles according to claim 7, characterized in that, The piezoelectric film sensors are arranged at the cross - nodes of the repair main pipe (1) and the annular connecting pipe (2) for detecting the vibration signals caused by crack propagation; The fiber Bragg grating sensors are arranged on the repair main pipe (1) and are spaced at intervals of 500 mm. Adjacent two fiber Bragg grating sensors are connected in series.

9. The self-repairing system for anti-floating piles according to claim 1, characterized in that, It also includes a micro - hydraulic pump and a solenoid valve. The micro - hydraulic pump is connected to the main repair agent inlet of the repair main pipe (1) through the solenoid valve. The repair agent is driven into the repair main pipe (1) by the pumping force of the micro - hydraulic pump, and the repair agent diffuses along the annular connecting pipe (2) and the repair fine pipe (3) to fill the deep cracks.

10. A self-repairing method for anti-floating piles, characterized in that, The specific steps are as follows: S1 According to the anti - floating pile waterproof level of the surrounding environment, the self - weight and counterweight of the upper structure, and the anti - floating pile design, formulate the corresponding self - repair anti - floating pile system design plan; S2 Initially determine the design of the repair pipeline, construct the repair pipeline that penetrates the pile body, and formulate the anti - floating pile self - repair system deployment plan; S3 According to the anti-floating pile system deployment plan, 6 - 8 repair main pipes are symmetrically arranged longitudinally along the pile body at an interval of 80 - 100 mm. Then, annular connecting pipes are arranged between multiple repair main pipes at an interval of every 200 mm, and self-repairing fine pipes are arranged on the annular connecting pipes and extended into the pile body; S4 Establish an anti-floating pile self-repair sensor network. Piezoelectric film sensors are arranged at the cross-nodes of the repair main pipes and the annular connecting pipes, and fiber Bragg grating sensors are deployed on the repair main pipes at an interval of every 500 mm along the repair main pipes, and are connected in series between adjacent two fiber Bragg grating sensors; S5 The repair pipeline uses a water-triggered curable polymer material, which is a flexible rubber hose before curing, ensuring that it remains soft during the construction process to adapt to complex pipeline layouts. The flexibility ensures that the repair pipe itself will not be damaged during the pouring process. The end of the pipeline 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 being triggered by water and cured, it reaches a hard state, with a certain stiffness and toughness, realizing the transformation from flexible to rigid, and meeting the construction and functional requirements of the repair pipe; S6 When cracks appear inside the anti-floating pile, the pipe wall of the repair pipeline ruptures when the external force gradually increases and reaches the critical external force. The piezoelectric film sensor detects the vibration signal caused by the crack propagation. The crack will also cause fiber strain and the grating wavelength to shift. The crack position is analyzed by the fiber Bragg grating sensor. The sensor signal is transmitted to the edge computing module, and the noise interference is excluded through the algorithm and the authenticity of the crack is confirmed. After the control center receives the confirmation signal, the anti-floating pile self-repair system is activated; S7 Start the micro hydraulic pump and solenoid valve in the corresponding partition. The pressure drives the repair agent into the repair main pipe. The repair agent diffuses along the annular connecting pipe and the repair fine pipe, and at the same time is filled into the deep cracks under the pressure drive. The repair agent reacts with the groundwater in the cracks to form a dense structure, realizing self-repair.

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