Multi-self-locking fabricated sheet-pile wall capable of achieving self-resetting after earthquake and construction method of multi-self-locking fabricated sheet-pile wall

Abstract

The invention relates to the technical field of sheet-pile walls, in particular to a post-earthquake self-resetting multiple self-locking assembly type sheet-pile wall which comprises pile bodies fixedly arranged on the ground at intervals in parallel; the adjacent baffles in the height direction of the pile body are mutually embedded through first mortise and tenon joint structures arranged in the length direction of the baffles, and the baffles and the pile body are mutually embedded through second mortise and tenon joint structures arranged in the height direction of the pile body and / or the width direction of the baffles. The reset structures are arranged in the first mortise and tenon areas of the adjacent baffles and used for restoring the initial embedding positions of the first mortise and tenon structures; the monitoring assembly is used for monitoring the pressure between the first mortise and tenon structures and the displacement of the baffle; and the control system is connected with the monitoring assembly and receives and processes the pressure and displacement data of the monitoring assembly. The mortise and tenon joint structure is arranged to be matched with the monitoring assembly and the resetting structure, so that the purposes of active and passive multiple self-locking and automatic resetting of the sheet-pile wall are achieved. The invention further correspondingly discloses a construction method of the sheet-pile wall.

Description

Technical Field

[0001] This invention relates to the field of pile-slab wall technology, and in particular to a post-earthquake self-resetting multi-locking prefabricated pile-slab wall and its construction method. Background Technology

[0002] In the field of geotechnical engineering, self-locking pile-slab walls are a common type of slope protection and foundation pit support structure, and their performance directly affects the safety and long-term stability of the project. However, traditional prefabricated pile-slab walls and the construction methods they rely on have revealed several technical bottlenecks that urgently need to be addressed under long-term use and extreme loads.

[0003] First, the locking status is unknowable, posing a significant safety hazard. Traditional structures rely entirely on periodic manual inspections to determine the locking status, lacking effective quantitative monitoring methods. However, earth pressure is dynamically changing under actual working conditions. For example, rainfall increases soil moisture content, causing a sudden rise in pressure, and long-term traffic loads and other dynamic loads can also cause structural fatigue. These changes leading to a decrease in locking force or loosening of connections are difficult to detect through manual observation and experience alone, easily resulting in "hidden failures." By the time the problem manifests, it has often developed into a serious safety accident.

[0004] Secondly, the reliance on passive response and lack of early warning and resetting capabilities means that existing structures, when exhibiting anomalies such as loose fasteners or panel displacement, cannot achieve early intervention due to the absence of integrated automated monitoring and early warning mechanisms. Maintenance work can only be carried out after the fact, and engineers often have to rely on crude methods such as tapping and listening to sounds and visual inspection to make judgments. This is not only inefficient and wasteful of manpower and resources, but also makes it difficult to accurately locate the problem, resulting in high maintenance costs and poor results. More importantly, traditional structures often suffer irreversible residual deformation after being subjected to strong loads such as earthquakes. This damage permanently weakens the structure's support capacity, and repair is extremely difficult, usually requiring large-scale demolition and reconstruction, which is costly and has far-reaching consequences.

[0005] Finally, there are inherent defects in the connection performance. Traditional mortise and tenon connections inevitably have initial gaps during processing and installation, resulting in insufficient structural rigidity. Furthermore, they are prone to loosening due to fretting wear during long-term use, affecting their long-term durability and load-bearing reliability. Summary of the Invention

[0006] To address at least one of the aforementioned technical problems, this invention proposes a post-earthquake self-resetting multi-locking prefabricated pile-slab wall and its construction method, thereby solving the problems of traditional prefabricated structures being unable to quantify locking force, having monitoring lag, and having a passive locking mechanism.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: The first aspect of this invention provides a post-earthquake self-resetting multi-locking prefabricated pile-slab wall, comprising: The piles are fixedly installed on the ground at intervals and parallel to each other; A plurality of baffles are provided, with adjacent baffles along the height direction of the pile body being fitted together by a first tenon and mortise structure provided along the length direction of the baffles, and the baffles being fitted together with the pile body by a second tenon and mortise structure provided along the height direction of the pile body and / or the width direction of the baffles; A reset structure is provided in the first tenon and mortise area adjacent to the baffle, which is used to restore the initial fitting position of the first tenon and mortise structure through the shape memory effect; A monitoring component is used to monitor the pressure between the first tenon and mortise structure and the displacement of the baffle. A control system is connected to the monitoring component. The control system receives and processes the pressure and displacement data of the monitoring component and controls the pile-slab wall to perform self-reset.

[0008] Preferably, the first tenon structure includes a first tenon spaced apart at the connection of the baffle and a first mortise formed by a groove between adjacent first tenons corresponding to the first tenons; both the first tenon and the first mortise are rectangular.

[0009] Preferably, the second tenon structure includes a second tenon fixedly disposed at both ends of the back side of the baffle along the width direction of the baffle and a second mortise corresponding to the second tenon and disposed along the height direction of the pile body; two second mortises are provided on the pile body adjacent to the baffle along the length direction of the pile wall; both the second tenon and the second mortise are dovetail shaped.

[0010] Preferably, the second tenon is provided with an expansion cavity for filling expansion material along the width direction of the baffle, and the second tenon is provided with an injection channel communicating with the expansion cavity for filling expansion material; the expansion material is a modified polyisocyanate + polyether triol system, and the expansion cavity is a cylindrical cavity.

[0011] Preferably, the reset structure includes a reset layer cast in the first tenon area, an SMA wire pre-embedded in the reset layer along the length of the reset layer, a heat tracing cable buried beside the SMA wire along the length of the reset layer, a temperature sensor buried beside the heat tracing cable for monitoring the temperature of the heat tracing cable, and an anchoring part fixed to both ends of the SMA wire; the SMA wire is corrugated, the anchoring part is a steel sleeve filled with UHPC, and the temperature sensor is a platinum resistance thermometer.

[0012] Preferably, the monitoring component includes a pressure sensor embedded in the second mortise and tenon area where the second tenon and the second mortise are in contact, and a displacement sensor disposed in the first tenon.

[0013] Preferably, the pressure sensor is a MEMS piezoresistive miniature pressure sensor, and the displacement sensor is a fiber Bragg grating sensor.

[0014] Preferably, the surfaces of the second tenon and the second mortise that come into contact are provided with an anti-wear layer, the anti-wear layer is made of UHPC material, and the surface of the anti-wear layer is covered with a friction layer composed of diamond particles.

[0015] A second aspect of the present invention provides a construction method for a post-earthquake self-resetting multi-locking prefabricated pile-slab wall as described in the first aspect, comprising the following steps: S1, Pile construction: According to the design requirements, the pile construction is carried out by driving piles or grouting piles, and a second mortise is processed on the pile body. A UHPC anti-wear layer is poured on the inner side of the second mortise and then ground smooth. S2, fabrication of baffles: According to design requirements, prefabricate a corresponding number of baffles with first tenon and mortise structures on both sides and baffles with first tenon and mortise structures on one side in the factory, and install fiber optic grating sensors at the first tenon; pre-embed steel sleeves for fixing SMA wires at both ends of the baffle, and the steel sleeves are fixedly connected to the main steel reinforcement of the baffle; after pouring a UHPC wear-resistant layer in the second tenon and second mortise area on the back side of the baffle, a pressure sensor is embedded and installed. S3, Baffle Installation: Use hoisting equipment to hoist the bottommost baffle to the installation position, ensuring accurate alignment of the second tenon and the second mortise, allowing the baffle to slide along the second mortise to the designed position under its own weight; install the upper baffles in sequence, ensuring accurate alignment of the first tenon and the first mortise between adjacent baffles; if the first tenon and the first mortise are not aligned, use a pry bar or guide steel piece for alignment guidance to ensure complete tenon and mortise fitting; S4, Reset Structure Construction: Install SMA wires, heat tracing cables, and temperature sensors in the first tenon and mortise area, and fix both ends of the SMA wires to the steel sleeve; use UHPC to pour the reset layer in the first tenon and mortise area and fill the connection gap in the first tenon and mortise area; fill the steel sleeve with UHPC. S5, Construction quality inspection: Check the verticality and flatness of the baffle, as well as the tightness of the tenon and mortise joint of the first and second tenon and mortise structures. S6 connects the MEMS piezoresistive miniature pressure sensor, fiber optic grating sensor, temperature sensor to the control system, and connects the heating cable to the power supply circuit.

[0016] Preferably, the construction method further includes the following steps: pre-setting an expansion cavity inside the second tenon, and simultaneously pre-setting an injection channel communicating with the expansion cavity in the second tenon, filling the expansion cavity with expansion material through the injection channel, so that the second tenon is pressed against the second mortise under the action of expansion force.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a second mortise and tenon structure between the baffle and the pile, enabling the baffle to mechanically interlock with the pile, forming a self-locking mechanism. Under inward compressive force in the horizontal direction, this creates a stable geometric constraint, ensuring that even when the pile-slab wall is subjected to significant lateral earth pressure or vibration due to earthquakes or other causes, the baffle is unlikely to detach from the pile, thus enhancing the reliability of the self-locking between the baffle and the pile. The first mortise and tenon structure resists misalignment and / or displacement of adjacent baffles in their own plane in the horizontal direction, and also limits vertical misalignment caused by uneven settlement of adjacent baffles to a certain extent in the vertical direction. This allows for the formation of a continuous wall with relatively high flatness, verticality, and geometric stability among several baffles, preventing gaps between baffles and ensuring the integrity of the wall surface, thus preventing backfill loss through gaps. Simultaneously, the first mortise and tenon structure transfers the load on the baffle to adjacent baffles, ensuring the entire pile-slab wall shares the load collaboratively, avoiding single-plate stress, and improving the overall integrity and redundancy of the structure. Based on the high sensitivity of the first tenon and mortise area to the slight deformation of the baffle, by setting a reset structure and monitoring components in the first tenon and mortise area of ​​the adjacent baffle, the residual displacement of the first tenon and mortise area after the earthquake is monitored, and the initial fitting position of the first tenon and mortise structure is restored through the shape memory effect of the reset structure, thereby achieving the purpose of multiple self-locking and automatic reset of the pile-slab wall. Attached Figure Description

[0018] Figure 1 A three-dimensional view of a post-earthquake self-resetting multi-locking prefabricated pile-slab wall; Figure 2 A front view of a post-earthquake self-resetting multi-locking prefabricated pile-slab wall; Figure 3 This is a rear view of a post-earthquake self-resetting multi-locking prefabricated pile-slab wall. Figure 4 A top view of a post-earthquake self-resetting multi-locking prefabricated pile-slab wall; Figure 5 This is a perspective view of the baffle in this invention; Figure 6 This is a rear view of the baffle in this invention; Figure 7 This is a front view of the baffle in this invention; Figure 8 This is a top view of the baffle in this invention; Figure 9 This is a perspective view of the pile body in this invention; Figure 10 This is a perspective view of a pile with two second mortises in this invention; Figure 11 This is a schematic diagram of the reset structure in this invention.

[0019] In the figure: 10, pile body; 20, baffle; 30, first tenon structure; 301, first tenon; 302, first mortise; 40, second tenon structure; 401, second tenon; 4011, expansion cavity; 402, second mortise; 50, reset structure; 501, reset layer; 502, SMA wire; 503, heating cable; 504, anchoring part. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments of the present invention.

[0021] Example 1 Please refer to Figures 1-11 As shown, a post-earthquake self-resetting multi-locking prefabricated pile-slab wall includes: 10 piles are fixedly installed on the ground at intervals and parallel to each other; Several baffles 20 are provided. Adjacent baffles 20 along the height direction of the pile body 10 are fitted together by a first tenon structure 30 provided along the length direction of the baffle 20. The baffles 20 and the pile body 10 are fitted together by a second tenon structure 40 provided along the height direction of the pile body 10 and / or the width direction of the baffle 20. The reset structure 50 is disposed in the first tenon and mortise area of ​​the adjacent baffle 20 and is used to restore the initial fitting position of the first tenon and mortise structure 30 through the shape memory effect. A monitoring component is used to monitor the pressure between the first tenon and mortise structure 30 and the displacement of the baffle 20; The control system is connected to the monitoring components. The control system receives and processes the pressure and displacement data of the monitoring components and controls the self-resetting of the pile-slab wall.

[0022] In this embodiment, a second tenon structure 40 is provided between the baffle 20 and the pile 10, enabling the baffle 20 to form a self-locking mechanism with the pile 10 through mechanical interlocking. When subjected to inward compressive force in the horizontal direction, this creates a stable geometric constraint, ensuring that even when the pile wall is subjected to significant lateral earth pressure or vibration due to earthquakes or other reasons, the baffle 20 is unlikely to detach from the pile 10, thus enhancing the reliability of the self-locking between the baffle 20 and the pile 10. The first tenon structure 30, by providing the first tenon structure, can resist misalignment and / or displacement of adjacent baffles 20 within their own plane in the horizontal direction, and in the vertical direction, it can also limit vertical misalignment caused by uneven settlement of adjacent baffles 20 to a certain extent. This allows several baffles 20 to form a continuous wall with relatively high flatness, verticality, and geometric stability, preventing the baffles 20 from detaching and forming gaps, ensuring the integrity of the wall surface, and preventing backfill from flowing out through the gaps. Simultaneously, the first tenon and mortise structure 30 can transfer the load on the baffle 20 to the adjacent baffle 20, enabling the entire pile-slab wall to bear the load collaboratively, avoiding single-plate stress, and improving the integrity and redundancy of the structure. Based on the high sensitivity of the first tenon and mortise area to the slight deformation of the baffle 20, by setting a reset structure 50 and monitoring components in the first tenon and mortise area of ​​the adjacent baffle 20, the residual displacement of the first tenon and mortise area after the earthquake is monitored, and the initial fitting position of the first tenon and mortise structure 30 is restored through the shape memory effect of the reset structure 50, thereby achieving the purpose of multiple self-locking and automatic reset of the pile-slab wall.

[0023] Please refer to Figures 1-3 as well as Figures 5-7 As shown, the first tenon structure 30 mentioned above includes a first tenon 301 spaced apart at the connection of the baffle 20 and a first mortise 302 formed by the groove between adjacent first tenons 301 corresponding to the first tenon 301; both the first tenon 301 and the first mortise 302 are rectangular.

[0024] Understandably, since the baffle 20 needs to be slid into the second mortise 402 of the pile body 10 during the installation of the pile plate wall, the rectangular first tenon 301 and the first mortise 302 facilitate the alignment and installation of the baffle 20 during the installation process. Minor deviations can also be fine-tuned by tools (such as pry bars), which improves the efficiency of construction.

[0025] Meanwhile, the rectangular first tenon structure 30 can ensure the uniformity of force transmission. Specifically, compared with point contact or line contact, when the baffle 20 is subjected to soil pressure, the contact surface of the first tenon structure 30 can uniformly transmit the pressure to the adjacent baffle 20, avoid stress concentration, and prevent local crushing.

[0026] Please refer to Figure 1 , Figure 4 , Figure 5 , Figures 8-10As shown, the above-mentioned second tenon structure 40 includes a second tenon 401 fixedly disposed at both ends of the back side of the baffle 20 along the width direction of the baffle 20, and a second mortise 402 corresponding to the second tenon 401 and opened along the height direction of the pile body 10; two second mortises 402 are provided on the pile body 10 corresponding to the adjacent baffle 20 along the length direction of the pile wall; both the second tenon 401 and the second mortise 402 are dovetail shaped.

[0027] Specifically, the typical characteristic of the dovetail shape is that it is narrow at the root and wide at the end, forming an inverted trapezoidal or wedge-shaped inclined surface (the contact surface between the first tenon 301 and the first mortise 302). This geometric structure allows the first tenon 301 to engage with the first mortise 302, and when subjected to tensile force, the inclined surface transforms it into compressive stress, thus forming a mechanical self-locking mechanism. At the same time, the force is transmitted and distributed at a gentler angle through the inclined surface, avoiding stress concentration, reducing the risk of cracks at the root of the first tenon 301, and improving the durability and bearing capacity of the pile body 10.

[0028] Furthermore, during installation, due to the guiding and restraining effect of the first mortise 302, after the first tenon 301 is aligned and slides into the first mortise 302, the baffle 20 will slide down along the first mortise 302 to the designed position by relying on its own weight.

[0029] Please refer to Figure 5 , Figure 6 and Figure 8 As shown, the second tenon 401 is provided with an expansion cavity 4011 for filling with expansion material along the width direction of the baffle 20, and the second tenon 401 is provided with an injection channel communicating with the expansion cavity 4011 for filling with expansion material. The expansion material is a modified polyisocyanate + polyether triol system, and the expansion cavity 4011 is a cylindrical cavity.

[0030] Understandably, compared to traditional mortise and tenon connections, which rely on machining precision and passive stress after installation, this embodiment, by setting an expansion cavity 4011, allows expansion material to be injected into the cylindrical expansion cavity 4011 after the baffle 20 is installed. As the material solidifies and expands, it applies radial pressure evenly from the inside to the inclined surface, causing the second tenon 401 to press more tightly against the second mortise 402 of the pile body 10. This effectively eliminates micro-gaps caused by machining tolerances and / or installation errors and / or long-term wear, achieving a "zero-gaps" interference fit between the second mortise and tenon structures 40. This reduces micro-movements and deformations at the connection of the second mortise and tenon structures 40, improves the stiffness and initial stability of the first mortise and tenon structure 30, and more effectively resists earth pressure and seismic loads.

[0031] Meanwhile, the cylindrical cavity ensures that the expansion pressure is applied evenly to the second tenon 401, resulting in more uniform contact stress between the second tenon 401 and the second mortise 402, thus preventing concrete crushing or cracking caused by excessive local stress. This not only improves the instantaneous load-bearing capacity but also significantly enhances the fatigue life of the second tenon structure 40 under long-term dynamic loads by suppressing fretting wear and stress concentration.

[0032] It should be noted that the modified polyisocyanate + polyether triol system used in this embodiment involves a polymerization reaction between the polyisocyanate and polyether triol after mixing. This process generates gases such as carbon dioxide, causing the system to rapidly foam and expand. The expansion rate and final pressure of this system can be precisely controlled through formulation ratios and catalysts to meet different engineering locking force requirements.

[0033] Meanwhile, by selecting polyether triols with different functionalities (such as trifunctional ones) to react with polyisocyanates, a three-dimensional network structure with moderate crosslinking density can be formed. This allows the cured foam to have both high compressive strength to withstand continuous soil pressure and the elasticity and toughness to absorb some of the seismic or impact loads.

[0034] Furthermore, "modified" polyisocyanates (such as MDI-based ones) typically have lower vapor pressures and better reaction uniformity than traditional TDI systems, which helps reduce internal defects and shrinkage during the curing process. Specifically, the extremely low late-stage shrinkage ensures that the applied preload does not significantly decrease over time, avoiding a decrease in locking force due to material shrinkage and guaranteeing the long-term effectiveness of the "hydraulic self-locking" effect.

[0035] In order to improve the self-locking capability of the second tenon structure 40, in this embodiment, the surfaces of the second tenon 401 and the second mortise 402 that are in contact are provided with an anti-wear layer. The anti-wear layer is made of UHPC material and a friction layer composed of diamond particles is applied to the surface of the anti-wear layer.

[0036] Understandably, corundum has high hardness and high wear resistance, which can significantly improve the friction coefficient of the contact surface. When earth pressure attempts to push the precast slab to move, the strong friction generates a reverse resistance, hindering the slab from sliding. This, in conjunction with mechanical self-locking, further enhances the overall anti-sliding ability of the structure, adapting to complex and variable soil and rock pressure environments.

[0037] Please refer to Figure 11As shown, in this embodiment, the reset structure 50 includes a reset layer 501 cast in the first tenon-and-mortise area, an SMA (shape memory alloy) wire embedded in the reset layer 501 along its length, a heat tracing cable 503 embedded beside the SMA wire 502 along its length, a temperature sensor embedded beside the heat tracing cable 503 for monitoring its temperature, and anchoring portions 504 fixed to both ends of the SMA wire 502. The monitoring components include a pressure sensor embedded in the second tenon-and-mortise area where the second tenon 401 contacts the second mortise 402, and a displacement sensor disposed in the first tenon 301.

[0038] It should be noted that in this embodiment, both the first tenon structure 30 and the reset layer 501 are cast using UHPC (ultra-high performance concrete), and the SMA wire 502 is corrugated. The anchoring part 504 uses a steel sleeve filled with UHPC, and the temperature sensor is a platinum resistance thermometer. The pressure sensor is a MEMS piezoresistive miniature pressure sensor, and the displacement sensor is a fiber optic grating sensor.

[0039] Specifically, the UHPC reset layer 501 acts as a rigid force transmission medium. During an earthquake, the first tenon and mortise area and the reset layer 501 provide sufficient stiffness to constrain the excessive displacement between the baffles 20. The SMA wire 502 absorbs seismic energy through limited slippage, preventing direct collision between the baffles 20. After the earthquake, the residual displacement between the baffles 20 (misalignment of the first tenon 301 and the first mortise 302) monitored by the displacement sensor is uploaded to the control system via a wireless transmission module. The control system determines whether to initiate self-reset based on the monitoring data. When self-reset is required, the control system sends a command to the heating cable 503 to trigger heating. The heating cable 503 rapidly transfers heat to the SMA wire 502, raising its temperature to the phase transition temperature and activating the shape memory effect. This distributes the concentrated force generated by the SMA wire 502 evenly across the entire contact surface of the first tenon and mortise structure 30. This allows the SMA wire 502 to directly transfer its restoring stress to the UHPC reset layer 501, ensuring that the two adjacent baffles 20 can be pulled back to their initial mating position as a whole.

[0040] To facilitate temperature monitoring of the heat tracing cable 503, this embodiment uses a platinum resistance temperature sensor to ensure that the SMA wire 502 is accurately heated to the phase change temperature for full activation. At the same time, it can also prevent the heat tracing cable 503 from overheating and damaging the SMA wire 502 and the reset layer 501.

[0041] Meanwhile, compared to ordinary concrete, SMA 502 has a smooth surface and extremely high recovery stress, making it prone to bond slip in ordinary concrete. However, UHPC has a dense microstructure, and its cement matrix and fibers can provide sufficient bond strength for SMA 502. When SMA 502 is corrugated, UHPC can fully fill the troughs, forming a very strong mechanical interlock.

[0042] Furthermore, while SMA wire 502 (typically a nickel-titanium alloy) is inherently corrosion-resistant, its phase transition temperature is sensitive to chemical composition, and surrounding components such as the heat tracing cable 503 and sensors require protection. Corrosion can severely impact the long-term reliability of the system. UHPC, with its extremely low permeability, effectively blocks the intrusion of harmful substances such as moisture and chloride ions, providing a relatively dry and stable microenvironment for the SMA wire 502 and the temperature control system (heat tracing cable 503, temperature sensors).

[0043] In this embodiment, the control system can be a MEMS intelligent system, mainly composed of MEMS sensors, actuators, a control system, and a data analysis platform, forming a closed-loop intelligent ecosystem integrating perception, decision-making, and execution. Specifically, the MEMS pressure and displacement sensors embedded in the tenon and mortise joints perceive the locking status and deformation of the structure in real time. The control system analyzes the data and makes intelligent decisions, ultimately triggering the heating cable 503 to activate the SMA wire 502 to perform a reset action. This upgrades the traditional passive protection structure into an intelligent resilient structure with real-time diagnosis, early warning, and post-earthquake self-reset capabilities.

[0044] Example 2 A construction method for a post-earthquake self-resetting multi-locking prefabricated pile-slab wall, as described in Example 1, includes the following steps: S1, Construction of Pile 10: According to the design requirements, pile 10 is constructed by driving or grouting piles, and a second mortise 402 is processed on the pile 10. A UHPC anti-wear layer is poured on the inner side of the second mortise 402 and then ground smooth.

[0045] It should be noted that the driving or grouting of piles ensures that the pile body 10 has sufficient bearing capacity and stability to transfer all loads to the foundation in a stable stratum. A dovetail-shaped second mortise 402 (guide groove) is cast on the pile body 10, providing geometric constraints for the precise installation of the subsequent baffle 20 and the self-locking effect.

[0046] A UHPC anti-wear layer is poured into the second tenon 402 and polished smooth to provide an extremely durable contact surface for long-term friction and seismic reciprocating action with the first tenon 301 of the baffle 20, preventing locking failure due to wear. At the same time, the smooth and hard UHPC surface provides an ideal substrate for applying the diamond abrasive friction layer, ensuring the reliability of friction self-locking.

[0047] S2, Fabrication of baffle 20: According to design requirements, prefabricate a corresponding number of baffles 20 with first tenon and mortise structures 30 on both sides and baffles 20 with first tenon and mortise structures 30 on one side in the factory. Install fiber optic grating sensors in the first tenon 301. Pre-embed steel sleeves for fixing SMA wires 502 at both ends of the baffle 20. The steel sleeves are fixedly connected to the main steel bars of the baffle 20. After pouring a UHPC wear-resistant layer in the second tenon and mortise area where the second tenon 401 and the second mortise 402 contact on the back side of the baffle 20, embed and install pressure sensors.

[0048] It should be noted that factory production ensures the concrete strength, dimensional accuracy, and height accuracy of all embedded parts, which is a prerequisite for rapid on-site assembly.

[0049] A fiber optic grating sensor is installed in the first tenon 301 to directly and accurately monitor the relative displacement between adjacent baffles 20. This is the key input signal for judging earthquake damage and triggering the reset function.

[0050] A pressure sensor is embedded in the second tenon 401 to directly and in real time quantify the locking force between the sheet and the pile, thereby realizing the transformation from "experience-based judgment" to "data perception" and providing core basis for monitoring the structural performance of the pile-slab wall.

[0051] The steel sleeves pre-embedded and connected to the main reinforcement provide a strong end anchoring foundation for the SMA wire 502, ensuring the effective transmission of the restoring force.

[0052] It is understood that the above-mentioned sensors can be selected according to actual testing needs, and this application does not impose any restrictions on them.

[0053] S3, Install the baffle 20; Use hoisting equipment to hoist the baffle 20 located at the bottom layer to the installation position, ensuring that the second tenon 401 and the second mortise 402 are accurately aligned, so that the baffle 20 slides along the second mortise 402 to the design position under its own weight; Install the baffles 20 located at the top layer in sequence, ensuring that the first tenon 301 and the first mortise 302 are accurately aligned between adjacent baffles 20; if the first tenon 301 and the first mortise 302 are not aligned, use a pry bar or guide steel piece to guide the alignment and ensure that the tenon and mortise are fully engaged.

[0054] It should be noted that the middle baffle 20 has a first tenon structure 30 on both sides, while the lower and upper baffles 20 only have a corresponding first tenon structure 30 on the side that contacts the baffle 20. To facilitate on-site installation, the upper and lower baffles 20 can be marked with numbers and installation direction markings.

[0055] S4, Reset Structure 50 Construction: Install SMA wire 502, heat tracing cable 503 and temperature sensor in the first tenon area, and fix both ends of SMA wire 502 to the steel sleeve; use UHPC to cast reset layer 501 in the first tenon area and fill the connection gap in the first tenon area; fill the steel sleeve with UHPC.

[0056] It should be noted that in this embodiment, the SMA wire 502 and the steel sleeve can be fixed by inserting the end of the SMA wire 502 into the pre-embedded steel sleeve, and a limiting block can be welded to the end of the SMA wire 502 for initial fixation. Then, by injecting UHPC into the steel sleeve, the solidified UHPC can form a solid anchor point for the SMA wire 502 with the steel sleeve.

[0057] S5, Construction quality inspection: Check the verticality and flatness of the baffle 20, as well as the tightness of the tenon and mortise fitting of the first tenon and mortise structure 30 and the second tenon and mortise structure 40.

[0058] S6 connects the MEMS piezoresistive miniature pressure sensor, fiber optic grating sensor, temperature sensor and control system, and connects the heat tracing cable 503 to the power supply circuit.

[0059] In order to adapt to active locking under extreme working conditions, in this embodiment, an expansion cavity 4011 is preset inside the second tenon 401, and an injection channel communicating with the expansion cavity 4011 is also preset in the second tenon 401. Expansion material is filled into the expansion cavity 4011 through the injection channel, so that the second tenon 401 is pressed against the second mortise 402 under the action of expansion force.

[0060] Specifically, the aforementioned mechanical self-locking (second tenon structure 40) and friction self-locking (diamond friction layer) are passive locking mechanisms, mainly relying on machining accuracy and external load. However, the expansion force generated by the expanding material within the expansion cavity 4011 creates a continuous and uniform hydraulic self-locking force inside the second tenon 401. This constitutes a triple self-locking system of mechanical-friction-hydraulic, providing extremely high installation safety redundancy for the pile-slab wall.

[0061] The above description is a specific implementation of the embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A post-earthquake self-resetting multi-self-locking fabricated pile-slab wall, characterized in that, The utility model relates to a pile -board wall, including: Pile body (10) is fixedly arranged in the ground in parallel interval; A plurality of baffle (20), along the height direction of the pile body (10) adjacent the baffle (20) through the first mortise and tenon structure (30) of the length direction of the baffle (20) interlocking, the baffle (20) with the pile body (10) through the second mortise and tenon structure (40) of the height direction of the pile body (10) and / or the width direction of the baffle (20) interlocking; Reset structure (50), the first mortise and tenon area of adjacent the baffle (20) is set, for through the initial interlocking position of the first mortise and tenon structure (30) recovery shape memory effect; Monitoring assembly for monitoring the pressure between the first mortise and tenon structure (30) and the displacement of the baffle (20); Control system connected with the monitoring assembly, the control system receives and processes the pressure and displacement data of the monitoring assembly, controls the pile board wall and carries out self-resetting.

2. The post-and-panel wall of claim 1, wherein: The first mortise and tenon structure (30) includes the first tenon (301) arranged at the connecting part of the baffle (20) and the first mortise (302) corresponding to the first tenon (301) formed by the groove between the adjacent first tenons (301);The first tenon (301) and the first mortise (302) are both rectangular.

3. The post-and-panel wall of claim 2, wherein: The second mortise and tenon structure (40) includes the second tenon (401) fixedly arranged at the back side of the baffle (20) at both ends along the width direction of the baffle (20) and the second mortise (402) corresponding to the second tenon (401) and opened along the height direction of the pile body (10);Two second mortises (402) are arranged on the pile body (10) corresponding to the adjacent baffles (20) along the length direction of the pile board wall;The second tenon (401) and the second mortise (402) are both swallow-tailed.

4. The post-and-panel wall of claim 3, wherein: The second tenon (401) is provided with an expansion cavity (4011) for filling expansion material along the width direction of the baffle (20), and the second tenon (401) is provided with an injection channel in communication with the expansion cavity (4011) for filling expansion material; The expansion material is a modified polyisocyanate + polyether triol system, and the expansion cavity (4011) is a cylindrical cavity.

5. The post-tensioned self-centering multi-self-locking fabricated pile-slab wall according to claim 4, wherein, The reset structure (50) includes a reset layer (501) cast in the first mortise and tenon area, an SMA wire (502) pre-buried in the reset layer (501) along the length direction of the reset layer (501), a heat tracing cable (503) buried beside the SMA wire (502) along the length direction of the reset layer (501), a temperature sensor buried beside the heat tracing cable (503) for monitoring the temperature of the heat tracing cable (503), and an anchoring part (504) fixed at both ends of the SMA wire (502);The SMA wire (502) is in a corrugated shape, the anchoring part (504) is a steel sleeve filled with UHPC, and the temperature sensor is a platinum resistance.

6. The post-tensioned self-centering multi-interlocked panelized shear wall of claim 5, wherein, The monitoring component comprises a pressure sensor embedded in a second mortise-tenon area where the second tenon (401) contacts the second mortise (402), and a displacement sensor arranged on the first tenon (301).

7. The post-and-panel wall of claim 6, wherein: The pressure sensor is a MEMS piezoresistive micro pressure sensor, and the displacement sensor is a fiber grating sensor.

8. The post-and-panel wall of any of claims 3-7, wherein, The surfaces of the second tenon (401) and the second mortise (402) where they contact each other are provided with an anti-wear layer, which is made of UHPC material, and a friction layer composed of corundum particles is laid on the surface of the anti-wear layer.

9. The construction method of the post-earthquake self-resetting and multiple self-locking assembled pile-slab wall according to claim 8, characterized in that, The method comprises the following steps: S1, pile body (10) construction: according to the design requirements, the pile body (10) is constructed in the form of piling or cast-in-place pile, and a second mortise (402) is processed on the pile body (10), a UHPC anti-wear layer is cast on the inner side of the second mortise (402), and it is polished flat; S2, making a baffle (20): according to the design requirements, a corresponding number of baffles (20) with a first mortise-tenon structure (30) on both sides and a baffle (20) with a first mortise-tenon structure (30) on one side are prefabricated in the factory, a fiber grating sensor is installed on the first tenon (301); a steel sleeve for fixing the SMA wire (502) is pre-buried at both ends of the baffle (20), and the steel sleeve is fixedly connected with the main reinforcement of the baffle (20); after the UHPC anti-wear layer is cast on the second mortise-tenon area where the second tenon (401) and the second mortise (402) of the back side of the baffle (20) contact each other, the pressure sensor is embedded and installed; S3, baffle (20) installation: using hoisting equipment, the baffle (20) located at the lowermost layer is hoisted to the installation position, ensuring that the position of the second tenon (401) and the second mortise (402) is accurately aligned, so that the baffle (20) slides to the designed position along the second mortise (402) under the action of its own gravity; the baffles (20) located at the upper layers are installed in sequence, and the first tenon (301) and the first mortise (302) between adjacent baffles (20) are accurately aligned during installation; when the first tenon (301) and the first mortise (302) are not accurately aligned, a crowbar or a guide steel piece is used for alignment and guidance to ensure that the mortise-tenon is completely embedded; S4, reset structure (50) construction: SMA wire (502), heating cable (503) and temperature sensor are arranged in the first mortise-tenon area, and the two ends of the SMA wire (502) are fixed with the steel sleeve; a reset layer (501) is cast with UHPC in the first mortise-tenon area and fills the connecting gaps in the first mortise-tenon area; UHPC is filled into the steel sleeve; S5, construction quality inspection: the perpendicularity, flatness of the baffle (20), and the compactness of the mortise-tenon embedding of the first mortise-tenon structure (30) and the second mortise-tenon structure (40) are checked; S6, connecting the MEMS piezoresistive micro pressure sensor, the fiber grating sensor, and the temperature sensor with the control system, and connecting the heating cable (503) with the power supply circuit.

10. The construction method of the post-earthquake self-resetting and multiple self-locking assembled pile-slab wall according to claim 9, characterized in that, The construction method further comprises the following steps: presetting an expansion cavity (4011) in the interior of the second tenon (401), and simultaneously presetting an injection channel in communication with the expansion cavity (4011) in the second tenon (401), filling the expansion cavity (4011) with an expansion material through the injection channel, so that the second tenon (401) is pressed towards the second mortise (402) under the expansion force.

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