Bearing platform-pile foundation structure and working method thereof

Abstract

The invention relates to a bearing platform-pile foundation structure and a working method thereof. The structure comprises a prefabricated bearing platform, a prefabricated pile foundation, a sensor, a connector area and a network communication module. The prefabricated bearing platform is connected with the prefabricated pile foundation through the joint area; a self-repairing material is arranged in a joint area and wraps one side of a joint of the prefabricated bearing platform and the prefabricated pile foundation; the sensor is embedded in the joint area; one side of the network communication module is electrically connected with the sensor, and the other side is wirelessly connected with the remote control system. According to the method, a sensor monitors and collects structure health state data in real time, the sensor transmits the structure health state data to a remote control system through a network communication module, the remote control system analyzes the data, and when an abnormal condition is detected, an electric signal is fed back to the sensor; compared with the prior art, the self-repairing material has the advantages of being high in stability, good in durability, suitable for complex environments and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of building foundation engineering, and in particular to a cap-pile foundation structure and a working method thereof. Background Art

[0002] In the traditional prefabricated cap-pile foundation connection, the deviation between the cap and the pile foundation or the construction error may cause quality problems in the connection part during the construction process, thus affecting the safety and long-term use effect of the structure. Although modern technology adopts high-strength bolt connection, grouting material reinforcement and other measures, in some high-risk areas, the structural connection part may still encounter problems such as excessive stress and cracks, and it is difficult to monitor and repair in real time.

[0003] To solve this problem, intelligent monitoring and self-repairing technologies have been gradually applied to structural engineering in recent years. Combined with the joint construction method of the prefabricated cap-pile foundation system, the health status of the joint parts is monitored in real time by intelligent sensors, and self-repairing materials are used to automatically repair the structure after it is damaged, which can effectively improve the safety and reliability of the prefabricated cap-pile foundation system.

[0004] Existing intelligent monitoring technologies have certain limitations in terms of sensor accuracy, real-time performance, and durability. Many traditional sensors cannot work stably and for a long time under harsh environmental conditions, especially in high-load and high-stress infrastructures, where sensors may fail due to drastic changes in the working environment. Secondly, although some self-healing technologies have been successfully applied to materials, their repair effects and speeds are often limited by environmental factors and the properties of the materials themselves, and the level of automation and intelligence of the repairs is insufficient. More importantly, existing technologies generally lack efficient integration solutions, making it difficult to achieve seamless connection between structural health monitoring and self-healing. Summary of the invention

[0005] The purpose of the present invention is to provide a pile foundation structure and a working method thereof in order to overcome the defects of the prior art.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] According to one aspect of the present invention, there is provided a cap-pile foundation structure, which includes a prefabricated cap 1, a prefabricated pile foundation 2, a sensor 3, a joint area 5 and a network communication module 6;

[0008] The prefabricated cap 1 is connected to the prefabricated pile foundation 2 via the joint area 5; the joint area 5 is provided with a self-repairing material 4, which is respectively wrapped around one side of the joint between the prefabricated cap 1 and the prefabricated pile foundation 2, and is used to repair the damaged part of the structure after being stimulated; the sensor 3 is embedded in the joint area 5, and is used to collect structural health status data; the network communication module 6 is electrically connected to the sensor 3 on one side, and wirelessly connected to the remote control system on the other side, and is used to complete the communication process between the sensor 3 and the remote control system. The remote control system is used to analyze and process the structural health status data, and output an excitation signal to the self-repairing material.

[0009] As a preferred technical solution, the self-repairing material 4 is made of expandable cement-based composite material.

[0010] As a preferred technical solution, the self-repairing material 4 is also coated or injected into the crack-prone area in the joint area 5 , wherein the crack-prone area includes the edge of the joint area 5 or the connection transition area in the joint area 5 .

[0011] As a preferred technical solution, the sensor 3 adopts an intelligent sensor, including an optical fiber sensor or a strain gauge sensor, which can monitor the stress, temperature, displacement and crack changes of the structure in real time and provide data feedback.

[0012] As a preferred technical solution, a spare sensor is reserved in the joint area 5 to ensure effective monitoring when a single sensor 3 fails.

[0013] As a preferred technical solution, concrete material is also provided in the joint area 5 , and the concrete material is cast in the joint area 5 by a post-casting method for connection and reinforcement.

[0014] As a preferred technical solution, the concrete material adopts a cement-based composite material composed of silica fume, a water-reducing agent and a fiber-reinforced material, wherein the silica fume accounts for 5% to 10% of the cement mass, the high-efficiency water-reducing agent accounts for 0.5% to 1.5% of the cement mass, the fiber-reinforced material content is 1.5 to 2.5 kilograms per cubic meter of concrete, and the water-cement ratio is 0.25 to 0.35.

[0015] According to another aspect of the present invention, a working method of a cap-pile foundation structure is provided. The method is applied to a cap-pile foundation structure as described above. In the method, a sensor 3 monitors and collects structural health status data in real time. The sensor 3 transmits the structural health status data to a remote control system via a network communication module 6. The remote control system analyzes the data. When an abnormal situation is detected, the self-healing material (4) is directly stimulated to perform repair work.

[0016] As a preferred technical solution, the structural health status data includes stress distribution, temperature change and crack width in the joint area 5.

[0017] As a preferred technical solution, abnormal conditions include: the stress in the joint area 5 exceeds a preset threshold or cracks appear.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The cap-pile foundation structure in the present invention includes a prefabricated cap, a prefabricated pile foundation, a sensor, a joint area and a network communication module. The prefabricated cap is connected to the prefabricated pile foundation through the joint area; the joint area is provided with a self-repairing material, which is respectively wrapped on one side of the joint between the prefabricated cap and the prefabricated pile foundation for repairing cracks; the sensor is embedded in the joint area for collecting structural health status data and stimulating the self-repairing material; the network communication module is electrically connected to the sensor on one side and wirelessly connected to the remote control system on the other side for completing the communication process between the sensor and the remote control system. By monitoring the stress, temperature and crack conditions of the joint part in real time through the sensor, potential problems can be discovered in time and corresponding measures can be taken to prevent the expansion of structural damage. The self-repairing material adopts an expandable cement-based composite material, which can automatically repair after cracks or damage are found, ensuring the long-term stability and durability of the joint part and reducing the subsequent maintenance cost.

[0020] 2. In the cap-pile foundation structure of the present invention, the joint area is also provided with concrete material, which is cast in the joint area by post-casting technology for connection and reinforcement. The concrete material adopts a cement-based composite material composed of silica powder, water reducer and fiber reinforcement material, wherein silica powder accounts for 5% to 10% of the cement mass, high-efficiency water reducer accounts for 0.5% to 1.5% of the cement mass, and the fiber reinforcement material content is 1.5 to 2.5 kilograms per cubic meter of concrete, and its water-cement ratio is 0.25 to 0.35. Through the preset connection of the prefabricated cap and the pile foundation, combined with the post-casting construction technology, it is possible to effectively compensate for construction errors, thereby improving the overall construction efficiency and reducing the difficulty of on-site construction.

[0021] 3. In the present invention, by installing intelligent sensors, the system can monitor the stress, temperature and crack conditions of the joints in real time, detect potential problems in a timely manner, and predict possible risks through data analysis. This enables the structure to respond quickly and intervene effectively when affected by changes in the external environment. The use of self-healing materials further enhances the structure's ability to adapt to complex environments. Self-healing materials can automatically repair themselves through their own chemical reactions when cracks or damage occur. They can not only maintain the stability of the structure in harsh environments, but also avoid long-term damage accumulation caused by external factors, thereby extending the service life of the structure. This not only improves the adaptability of the structure in complex environments, but also enhances its safety and reliability under high load requirements, ensuring that the structure maintains good performance for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the prefabricated cap-pile foundation joint structure based on intelligent monitoring and self-repairing technology in the present invention;

[0023] Figure 2 It is a working principle diagram of the intelligent monitoring system in the present invention;

[0024] Figure 3 This is a schematic diagram of the application of the self-healing material in the joint part in the embodiment;

[0025] In the figure, 1 is a prefabricated foundation, 2 is a prefabricated pile foundation, 3 is a sensor, 4 is a self-healing material, 5 is a joint area, and 6 is a network communication module. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] In the traditional prefabricated cap-pile foundation connection, the deviation between the cap and the pile foundation or the construction error may cause quality problems in the connection part during the construction process, thus affecting the safety and long-term use effect of the structure. Although modern technology adopts high-strength bolt connection, grouting material reinforcement and other measures, in some high-risk areas, the structural connection part may still encounter problems such as excessive stress and cracks, and it is difficult to monitor and repair in real time.

[0028] To solve this problem, intelligent monitoring and self-repairing technologies have been gradually applied to structural engineering in recent years. Combined with the joint construction method of the prefabricated cap-pile foundation system, the health status of the joint parts is monitored in real time by intelligent sensors, and self-repairing materials are used to automatically repair the structure after it is damaged, which can effectively improve the safety and reliability of the prefabricated cap-pile foundation system.

[0029] Existing intelligent monitoring technologies have certain limitations in terms of sensor accuracy, real-time performance, and durability. Many traditional sensors cannot work stably and for a long time under harsh environmental conditions, especially in high-load and high-stress infrastructures, where sensors may fail due to drastic changes in the working environment. Secondly, although some self-healing technologies have been successfully applied to materials, their repair effects and speeds are often limited by environmental factors and the properties of the materials themselves, and the level of automation and intelligence of the repairs is insufficient. More importantly, existing technologies generally lack efficient integration solutions, making it difficult to achieve seamless connection between structural health monitoring and self-healing.

[0030] In this application, these problems are effectively solved by combining the application of smart sensors and self-healing materials. Smart sensors can not only monitor the stress, temperature, cracks and other conditions of the joint in real time, but also provide timely feedback when abnormalities are found to ensure the accuracy and real-time nature of the data. The self-healing material uses an expandable cement-based composite material that can automatically expand when cracks or damage occur, fill cracks and restore the integrity of the structure, greatly improving the efficiency and automation level of repair. In addition, the system in this application realizes data transmission and analysis through a remote monitoring platform, and can determine whether the self-healing material needs to be activated based on the real-time data fed back by the sensor, thereby ensuring the long-term stability and safety of the structure. This integrated technical solution not only solves the problem of difficulty in real-time monitoring and repair in traditional methods, but also greatly improves the durability and reliability of the structure.

[0031] Example 1

[0032] In this embodiment, a cap-pile foundation structure is used to effectively compensate for on-site construction errors and avoid installation difficulties caused by the mismatch between the prefabricated cap 1 and the pile foundation size. Figure 1 As shown, the structure includes a prefabricated cap 1, a prefabricated pile foundation 2, a sensor 3, a joint area 5 and a network communication module 6;

[0033] Among them, the prefabricated foundation 1 is connected to the prefabricated pile foundation 2 through the joint area 5; the joint area 5 is provided with a self-repairing material 4, which is respectively wrapped around one side of the joint between the prefabricated foundation 1 and the prefabricated pile foundation 2. The self-repairing material 4 can automatically repair cracks or other damaged parts after structural damage is found.

[0034] The sensor 3 is embedded in the joint area 5 and is used to collect structural health status data; the sensor 3 is used to detect structural health status data such as stress distribution, temperature change, crack width, etc. of the joint in real time.

[0035] One side of the network communication module 6 is electrically connected to the sensor 3, and the other side is wirelessly connected to the remote control system, which is used to complete the communication process between the sensor 3 and the remote control system. The remote control system performs data transmission and processing, and can monitor the health status of the prefabricated cap 1 and the pile foundation in real time, and automatically send out a warning signal when a potential risk is detected;

[0036] The self-repairing material 4 uses an expandable cement-based composite material that can automatically expand at structural cracks, fill the cracks and achieve self-healing.

[0037] The self-healing material 4 is also coated or injected into the crack prone area in the joint area 5 , wherein the crack prone area includes the edge of the joint area 5 or the connection transition area in the joint area 5 .

[0038] Sensor 3 uses intelligent sensors, including optical fiber sensors or strain gauge sensors, which can monitor the stress, temperature, displacement and crack changes of the structure in real time and provide data feedback. A spare sensor is reserved in the joint area 5 to ensure effective monitoring when a single sensor 3 fails.

[0039] The joint area 5 is also provided with concrete material, which is poured in the joint area 5 by post-casting technology for connection and reinforcement. The concrete material is a cement-based composite material composed of silica fume, water reducing agent and fiber reinforcement material, wherein the silica fume accounts for 5% to 10% of the cement mass, the high-efficiency water reducing agent accounts for 0.5% to 1.5% of the cement mass, the fiber reinforcement material content is 1.5 to 2.5 kg per cubic meter of concrete, and the water-cement ratio is 0.25 to 0.35.

[0040] In this embodiment, the intelligent monitoring technology and the self-repairing material 4 are combined to provide an efficient and stable prefabricated cap-pile foundation joint structure. The specific implementation steps are as follows:

[0041] In this embodiment, the prefabricated cap 1 and the prefabricated pile foundation 2 have been manufactured before construction, and the joint area 5 is pre-set with mounting holes and embedded intelligent sensor positions. The sensor 3 has the monitoring functions of stress, temperature, and crack width, and can collect data of the joint in real time and transmit it to the remote control system through a wireless network.

[0042] In this embodiment, during the construction process, the sensor 3 will continuously monitor the health of the joint. When the stress of the joint exceeds the design range or cracks occur, the sensor 3 will immediately transmit the data to the remote control center through the wireless network. The center analyzes the joint status based on the received data. If cracks have been formed or damaged, the system will immediately start the repair process of the self-healing material 4.

[0043] In this embodiment, the top of the prefabricated pile foundation 2 and the bottom of the prefabricated foundation 1 are coated or injected with a self-repairing material 4, which has the function of automatically expanding or filling cracks. When cracks appear, the self-repairing material 4 will automatically expand in the crack area to form a new cement-based composite structure, completely fill the cracks, and restore the integrity of the joint. The reaction time of the self-repairing material 4 is usually within a few hours to 24 hours, which can greatly improve the durability of the joint.

[0044] In this embodiment, the joint area 5 of the structure is reinforced by post-casting technology. After the concrete is poured, the intelligent sensor is used to monitor the curing of the concrete and the degree of bonding with the self-repairing material 4. Through real-time data feedback, the full bonding of the concrete and the self-repairing material 4 is ensured to avoid the occurrence of voids or uneven reinforcement.

[0045] In this embodiment, during the inspection process after the concrete is cured, the system will start the sensor 3 again to conduct a comprehensive inspection to ensure that there are no potential cracks or structural damage in the joint area 5. The intelligent monitoring system can timely predict the structural changes of the joint part by continuously analyzing the data of the sensor 3 and provide accurate data support for maintenance.

[0046] In this embodiment, the arrangement of the smart sensor and the self-healing material 4 is optimized according to the stress distribution of the joint, the crack development characteristics and the use environment, including the following steps:

[0047] Stress distribution analysis: Analyze the stress distribution in the joint area 5 through finite element simulation or on-site measurement to determine the high stress concentration areas, and focus on arranging smart sensors in these areas to monitor stress changes in real time.

[0048] Sensor arrangement scheme: Multiple groups of sensors 3 are evenly arranged in the joint area 5, and the density of sensors 3 is additionally increased at stress concentration locations (such as shear surfaces and connection interfaces) to ensure the comprehensiveness and accuracy of the monitoring data.

[0049] Self-repairing material layout: Self-repairing material 4 is applied or injected into crack-prone areas (such as joint edges and connection transition areas) to ensure full integration of the material with the concrete joint surface.

[0050] Environmental adaptability adjustment: According to the use environment (such as high humidity, high salt, high temperature and other working conditions), the formula of the self-healing material 4 is adjusted to enhance corrosion resistance, high temperature resistance or cold resistance.

[0051] Redundant design: To ensure long-term stability, multiple sets of spare sensors are reserved in the joint area 5 to ensure effective monitoring when a single sensor 3 fails.

[0052] Dynamic optimization and adjustment: Based on long-term monitoring data, the monitoring threshold of the sensor 3 and the activation conditions of the self-healing material 4 are dynamically adjusted to adapt to changes in the stress and damage characteristics of the joint area 5.

[0053] Example 2

[0054] In this embodiment, a working method of a cap-pile foundation structure is adopted. Figure 2 As shown, in this method, the sensor 3 monitors and collects the structural health status data in real time, and the sensor 3 transmits the structural health status data to the remote control system via the network communication module 6. The remote control system analyzes the data, and when an abnormal situation is detected, the self-healing material (4) is directly stimulated to perform repair work.

[0055] The structural health status data includes stress distribution, temperature change and crack width of the joint area 5; abnormal conditions include: the stress of the joint area 5 exceeds a preset threshold or cracks appear.

[0056] In complex geological environments, factors such as soil changes, groundwater level fluctuations, and earthquakes may have varying degrees of impact on the structure. By installing intelligent sensors, the system can monitor the stress, temperature, and cracks at the joints in real time, detect potential problems in a timely manner, and predict possible risks through data analysis. This technical means enables the structure to respond quickly and intervene effectively when it is affected by changes in the external environment. The use of self-healing materials further enhances the structure's ability to adapt to complex environments. Self-healing materials can automatically repair themselves through their own chemical reactions when cracks or damage occur. They can not only maintain the stability of the structure in harsh environments, but also avoid the accumulation of long-term damage caused by external factors, thereby extending the service life of the structure. The combination of these technical means not only improves the adaptability of the structure in complex environments, but also enhances its safety and reliability under high load requirements, ensuring that the infrastructure maintains good performance for a long time.

[0057] In this embodiment, a prefabricated cap-pile foundation joint structure connected by steel plates and bolts is used. In this embodiment, it is further described how to combine intelligent monitoring and self-repairing materials 4 to improve joint stability and ensure long-term safety during post-casting construction.

[0058] In this embodiment, an intelligent sensor is embedded between the prefabricated cap 1 and the prefabricated pile foundation 2. The sensor 3 is arranged on both sides of the joint area 5 to ensure that the health of the entire joint can be fully monitored. The sensor 3 is connected to the remote control system to provide real-time feedback of the data of the joint area 5.

[0059] In this embodiment, the self-repairing material 4 is a specially formulated cement-based composite material with high expansion and filling capacity. In the joint area 5, the intelligent sensor continuously detects the crack changes and stress distribution at the joint to ensure that the repair can be started immediately when the crack occurs. The self-repairing material 4 can automatically expand after the crack occurs, fill the crack and restore the strength of the joint.

[0060] In this embodiment, the post-casting construction steps mainly include pouring high-performance concrete into the joint area 5. The curing temperature, humidity and crack development of the post-cast concrete are monitored in real time by intelligent sensors to ensure the perfect combination of concrete and self-repairing material 4. Once cracks or damage are detected, the intelligent system will start the self-repairing function to quickly repair the cracked part to avoid structural failure.

[0061] In this embodiment, the concrete material is poured in the joint area 5 by post-casting technology for connection and reinforcement. The concrete material is a cement-based composite material composed of silica fume, water reducing agent and fiber reinforcement material, wherein the silica fume accounts for 5% to 10% of the cement mass, the high-efficiency water reducing agent accounts for 0.5% to 1.5% of the cement mass, the fiber reinforcement material content is 1.5 to 2.5 kg per cubic meter of concrete, and the water-cement ratio is 0.25 to 0.35.

[0062] In this embodiment, the intelligent monitoring system combined with data analysis can evaluate the health status of the joint in real time. When the system detects abnormal data, it will automatically send an alarm to the remote control center and provide a detailed repair plan. Through this real-time feedback mechanism, the construction unit can understand the joint status in time and take necessary measures. This structure has a self-repairing function, and its self-repairing material 4 is used in the joint. Figure 3 shown.

[0063] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A cap-pile foundation structure, characterized in that: The structure comprises a prefabricated foundation (1), a prefabricated pile foundation (2), a sensor (3), a joint area (5) and a network communication module (6); The prefabricated cap (1) is connected to the prefabricated pile foundation (2) via a joint region (5); a self-repairing material (4) is provided in the joint region (5) and is respectively wrapped around one side of the joint between the prefabricated cap (1) and the prefabricated pile foundation (2) for repairing a damaged part of the structure after being stimulated; The sensor (3) is embedded in the joint area (5) and is used to collect structural health status data; The network communication module (6) is electrically connected to the sensor (3) on one side and wirelessly connected to the remote control system on the other side, and is used to complete the communication process between the sensor (3) and the remote control system. The remote control system is used to analyze and process structural health status data and output an excitation signal to the self-repairing material.

2. A cap-pile foundation structure according to claim 1, characterized in that: The self-repairing material (4) is an expandable cement-based composite material.

3. A cap-pile foundation structure according to claim 2, characterized in that: The self-repairing material (4) is also coated or injected into the crack-prone area in the joint area (5), wherein the crack-prone area includes the edge of the joint area (5) or the connection transition area in the joint area (5).

4. The cap-pile foundation structure according to claim 1, characterized in that: The sensor (3) is an intelligent sensor, including an optical fiber sensor or a strain gauge sensor, which can monitor the stress, temperature, displacement and crack changes of the structure in real time and provide data feedback.

5. The cap-pile foundation structure according to claim 1, characterized in that: A spare sensor is reserved in the joint area (5) to ensure effective monitoring when a single sensor fails.

6. The cap-pile foundation structure according to claim 1, characterized in that: The joint area (5) is also provided with concrete material, which is poured into the joint area (5) using a post-casting technique for connection and reinforcement.

7. A cap-pile foundation structure according to claim 6, characterized in that: The concrete material adopts a cement-based composite material composed of silica powder, a water reducing agent and a fiber reinforcement material, wherein the silica powder accounts for 5% to 10% of the cement mass, the water reducing agent accounts for 0.5% to 1.5% of the cement mass, the fiber reinforcement material content is 1.5 to 2.5 kilograms per cubic meter of concrete, and the water-cement ratio is 0.25 to 0.

35.

8. A working method of a cap-pile foundation structure, characterized in that: The method is applied in a cap-pile foundation structure as described in any one of claims 1 to 7. In the method, a sensor (3) monitors and collects structural health status data in real time. The sensor (3) transmits the structural health status data to a remote control system via a network communication module (6). The remote control system analyzes the data and directly stimulates the self-healing material (4) to perform repair work when an abnormal situation is detected.

9. A working method for a cap-pile foundation structure according to claim 8, characterized in that: The structural health status data includes stress distribution, temperature change and crack width in the joint area (5).

10. A working method for a cap-pile foundation structure according to claim 8, characterized in that: The abnormal conditions include: the stress in the joint area (5) exceeds a preset threshold or cracks appear.

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