Stress effect monitoring device and pile group construction method

Abstract

The invention relates to a stress effect monitoring device and a pile group construction method, and relates to the technical field of building construction, the stress effect monitoring device comprises a sensor module, a data acquisition and transmission module, a data processing and control system, a stress release execution module and a power supply module; the sensor module comprises a soil pressure sensor, a moisture content sensor and a displacement sensor, the multiple sensors are evenly distributed in a construction area in a grid shape to form a monitoring network covering the whole construction area, and the data acquisition and transmission module is used for acquiring data of the sensors and transmitting the data to the data processing and control system. The data processing and control system analyzes and processes the received data and sends out a control instruction according to a preset stress threshold value and a model, and the stress release execution module sets a stress release groove and a stress release hole in a construction site according to the control instruction. The intelligent pile pressing device has the effect that pile drilling construction is intelligently and accurately controlled so as to guarantee the smooth proceeding of the pile pressing process.

Description

Technical Field

[0001] The present application relates to building construction, and in particular to a stress effect monitoring device and a pile group construction method. Background Art

[0002] Currently, when carrying out construction in complex geological environments, many challenges are faced, such as groundwater, underground humidity, and the contact between underground structures and the surrounding environment. In order to improve the stability of the building, it is necessary to carry out pile foundation construction at the construction site.

[0003] During the construction of pile groups, due to the concentrated distribution of pile foundations, the pile bodies will continuously squeeze the soil in the site during construction, and produce a soil squeezing effect, resulting in a high excess pore water pressure in the soil around the piles. After squeezing, the soil will be compacted into saturated soil. The excess pore water pressure in the saturated soil is not easy to dissipate. In the subsequent construction process, it will cause great interference to the remaining piles, which can easily cause the adjacent piles to rise or break, and cause cracks, settlement and deformation problems in the surrounding buildings or terrain.

[0004] Therefore, a device is needed to monitor the stress effect during the pile group construction process, so as to achieve accurate stress release during the pile group construction process and ensure the smooth progress of the pile group construction. A stress effect monitoring device and a pile group construction method are needed. Summary of the Invention

[0005] The purpose of this application is to provide a stress effect monitoring device and a pile group construction method to solve the above-mentioned problems.

[0006] In a first aspect, the present application provides a stress effect monitoring device that adopts the following technical solution: comprising a sensor module, a data acquisition and transmission module, a data processing and control system, a stress release execution module, and a power supply module; The sensor module includes a soil pressure sensor, a moisture content sensor, and a displacement sensor. Multiple sensors are evenly distributed in a grid pattern in the construction area to form a monitoring network covering the entire construction area. The data acquisition and transmission module is used to collect sensor data and transmit it to a data processing and control system. The data processing and control system analyzes and processes the received data and issues control instructions based on preset stress thresholds and models. The stress release execution module sets stress release trenches and stress release holes at the construction site according to the control instructions. The power supply module provides power for the entire monitoring device.

[0007] Preferably, the soil pressure sensor is a piezoresistive soil pressure sensor, the surface of which has been treated for corrosion resistance and wear resistance, the moisture content sensor is a moisture content sensor based on the frequency domain reflection principle, and the displacement sensor is a laser displacement sensor.

[0008] Preferably, the data acquisition and transmission module includes a data collector and a wireless transmission module. The data collector is mainly composed of a multi-channel analog-to-digital converter, a microprocessor, a memory and an interface circuit. It collects data from multiple sensors, pre-processes them and converts them into digital signals. The wireless transmission module is a low-power, long-distance wireless communication module, mainly composed of a radio frequency chip and an antenna. The radio frequency chip is responsible for data modulation and demodulation, and the antenna is used to transmit and receive wireless signals.

[0009] Preferably, the data processing and control system includes an industrial computer, which is electrically connected to the data acquisition and transmission module. The industrial computer has a built-in software system, including a data analysis module, which presents the sensor data on the industrial computer.

[0010] Preferably, the stress release execution module includes stress release groove and stress release hole construction equipment, the construction equipment includes an excavator and a drilling rig, and the stress release execution module is electrically connected to a data processing and control system.

[0011] Preferably, the power module includes a solar panel and a battery, the solar panel is composed of a plurality of solar cells, the battery is electrically connected to the solar panel, and the power module also includes a charge controller and an inverter. The charge controller is used to control the charging process of the solar panel to the battery to prevent overcharging and over-discharging of the battery, and the inverter is used to convert the direct current of the battery into alternating current to power equipment requiring alternating current.

[0012] In a second aspect, the present application provides a pile group construction method using the following technical solution: comprising the following steps: Construction preparation: Survey the construction site, determine the pile foundation layout and monitoring device installation location, and install and debug the stress effect monitoring device; Pile foundation construction: Pile foundation construction is carried out according to the pile foundation layout plan. The monitoring device monitors the soil stress changes in real time and transmits the data to the data processing and control system; Stress release and adjustment: The data processing and control system analyzes data and issues control instructions when stress exceeds a preset threshold. The stress release execution module sets stress relief grooves and stress relief holes, continuously monitors during construction, and adjusts stress relief measures based on the monitoring results. Construction monitoring and acceptance: Continuously monitor stress effects throughout the construction process. After construction is completed, inspect the pile group foundation and monitor deformation of surrounding buildings. Conduct acceptance evaluation based on the inspection results.

[0013] Preferably, during the pile foundation construction process, the pile foundation construction parameters, including the pile driving speed and pile driving sequence, are adjusted in a timely manner according to the real-time monitoring data. During the stress release and adjustment process, the stress release effect is evaluated according to the monitoring results. When the stress release is insufficient and new stress concentration areas appear, the size, depth and spacing of the stress release grooves and stress release holes are adjusted, or their number is increased.

[0014] Preferably, during the construction acceptance, the pile body integrity test and single pile bearing capacity test are carried out on the pile foundation, and the settlement and displacement of the surrounding buildings are monitored.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. The piezoresistive soil pressure sensor is mainly composed of a sensitive element, a conversion circuit and a shell. The sensitive element is an elastic body with a strain gauge. When subjected to soil pressure, the elastic body deforms and the resistance value of the strain gauge changes. The conversion circuit converts the resistance value change into an electrical signal output. The shell is made of high-strength, corrosion-resistant and wear-resistant metal material, and the surface is specially treated to improve its corrosion and wear resistance. The soil pressure sensor is buried vertically in the soil to ensure that the sensor is in close contact with the soil and can accurately sense the soil pressure. The piezoresistive sensor has the advantages of high measurement accuracy and fast response speed. It can accurately measure the pressure changes of the soil. After the surface is treated with corrosion resistance and wear resistance, the sensor can work stably for a long time in harsh construction environments and extend its service life. The moisture content sensor based on the frequency domain reflection principle is mainly composed of a transmitting antenna, a receiving antenna, a signal processing circuit and a shell. The transmitting antenna transmits high-frequency electromagnetic waves to the soil. When the electromagnetic waves propagate in the soil, their propagation speed and attenuation are closely related to the moisture content of the soil. The laser line receives the reflected electromagnetic wave signal, and the signal processing circuit analyzes and processes the signal to calculate the moisture content of the soil. The sensor can measure the moisture content of the soil in real time and accurately, providing data support for analyzing the relationship between soil stress and moisture. Moisture content is one of the important factors affecting the stress characteristics of soil. By monitoring the moisture content, we can better understand the stress changes of the soil. The laser displacement sensor is mainly composed of a laser transmitter, a laser receiver, a signal processing unit and a shell. The laser transmitter transmits a beam of laser to the soil surface, and the laser receiver receives the reflected laser signal. The signal processing unit calculates the displacement change of the soil surface based on the time difference between laser emission and reception. The laser displacement sensor has the advantages of high measurement accuracy, wide measurement range, and non-contact measurement. It can accurately measure the local deformation of the soil. During the construction of pile groups, timely detection of abnormal displacement of the soil is crucial to ensuring the stability of the pile foundation and construction safety. Three different sensors can be used to monitor three important data for stress effect monitoring. 2. The multi-channel analog-to-digital converter of the data collector can simultaneously collect analog signals from multiple sensors and convert them into digital signals. The microprocessor processes and stores the digital signals, including filtering, amplification and preprocessing operations to improve the quality and reliability of the data. The memory is used to store the collected data, and the interface circuit is used to communicate with the wireless transmission module. The multi-channel design can collect data from multiple sensors at the same time, improving data collection efficiency. The data preprocessing function can remove noise and interference, improve data accuracy and reliability, and the memory can save historical data for subsequent query and analysis. The industrial computer has powerful computing and storage capabilities and can run complex software systems. The data analysis module in the software system can analyze and process the collected sensor data and draw charts of stress-time curves, moisture content-time curves, and displacement-time curves for staff to view. The high performance of the industrial computer can ensure the efficiency and accuracy of data processing and analysis, and the intuitive graphical interface allows users to view real-time monitoring data. and historical data, timely discover abnormal situations and take corresponding measures. The stress release execution module is mainly composed of construction equipment such as excavators and drilling rigs, and is used to set stress relief trenches and stress relief holes at the construction site. The excavator is used to dig stress relief trenches, and the drilling rig is used to drill stress relief holes. The stress release execution module is connected to the data processing and control system through cables or wirelessly, and can receive control instructions issued by the data processing and control system. By setting stress relief trenches and stress relief holes, the stress in the soil can be effectively released, reducing the squeezing of the soil on the pile foundation, ensuring the stability of the pile foundation and construction safety. It is electrically connected to the data processing and control system to achieve automatic control and improve construction efficiency and accuracy. The solar power supply method has the advantages of environmental protection and energy saving, can reduce dependence on traditional power grids, and reduce operating costs. The use of charging controllers and inverters can ensure the stability and reliability of the power supply system, extend the service life of the battery, and ensure that the device can work normally in various environments. The mutual coordination of multiple modules can make the equipment operation efficiency more accurate and less wear-and-tear; 3. Through detailed investigation and installation and commissioning of monitoring devices in the construction preparation stage, accurate basic data and guarantees are provided for subsequent construction. Real-time monitoring of stress changes during pile foundation construction can timely detect abnormal conditions and take corresponding measures to ensure construction safety. Stress release and adjustment measures can effectively release stress in the soil, reduce the impact on the pile foundation, and improve the stability of the pile foundation. The construction monitoring and acceptance link can comprehensively evaluate the quality and safety of the pile group foundation to ensure that the project meets the design requirements. According to the real-time monitoring data, the pile foundation construction parameters are adjusted in time to effectively control the stress changes in the soil, reduce the squeezing and damage of the soil on the pile foundation, and ensure the construction quality of the pile foundation. At the same time, it can improve construction efficiency and avoid construction interruptions and rework caused by abnormal stress. According to the monitoring results, the stress release measures are adjusted in time to ensure that the stress is effectively released and the subsequent impact of the soil on the pile foundation is reduced. By optimizing the parameters of the stress release trench and stress release hole, it can be Improve the stress release effect, ensure the stability and safety of the pile group foundation, use low strain method and high strain method to detect whether there are defects, cracks, etc. in the pile body, use static load test to determine the bearing capacity of single pile under vertical load, set up settlement observation points and displacement monitoring points on surrounding buildings, use level and total station measuring instruments to monitor the settlement and displacement of buildings regularly, analyze the monitoring data, and judge whether the building is affected by the pile group construction. Pile body integrity detection and single pile bearing capacity detection can ensure the quality and safety of the pile group foundation and ensure that the pile foundation can withstand the design load. Settlement and displacement monitoring of surrounding buildings can timely discover the deformation of buildings caused by pile group construction, take corresponding measures to repair and reinforce them, and protect the safety of surrounding buildings. This method can be used to carry out intelligent and precise control of pile drilling construction to ensure the smooth progress of the pile pressing process and improve the operation level and stress release rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall workflow of this application. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1 , further details of this application are given.

[0018] Example 1: A stress effect monitoring device, referring to Figure 1 , including sensor module, data acquisition and transmission module, data processing and control system, stress release execution module and power supply module; The sensor module includes soil pressure sensors, moisture content sensors and displacement sensors. Multiple sensors are evenly distributed in the construction area in a grid pattern, forming a monitoring network covering the entire construction area. The data acquisition and transmission module is used to collect sensor data and transmit it to the data processing and control system. The data processing and control system analyzes and processes the received data and issues control instructions based on preset stress thresholds and models. The stress release execution module sets stress release trenches and stress release holes at the construction site according to the control instructions. The power supply module provides power for the entire monitoring device.

[0019] The soil pressure sensor is a piezoresistive soil pressure sensor with a surface treated for corrosion resistance and wear resistance. The moisture content sensor is a moisture content sensor based on the frequency domain reflection principle. The displacement sensor is a laser displacement sensor.

[0020] Specifically, the piezoresistive soil pressure sensor is mainly composed of a sensitive element, a conversion circuit and a shell. The sensitive element is an elastic body with a strain gauge. When subjected to soil pressure, the elastic body deforms and the resistance value of the strain gauge changes. The conversion circuit converts the resistance value change into an electrical signal output. The shell is made of high-strength, corrosion-resistant and wear-resistant metal material, and the surface is specially treated to improve its corrosion resistance and wear resistance. The soil pressure sensor is vertically buried in the soil to ensure that the sensor is in close contact with the soil and can accurately sense the soil pressure. The piezoresistive sensor has the advantages of high measurement accuracy and fast response speed. It can accurately measure the pressure changes of the soil. After the surface is treated with corrosion resistance and wear resistance, the sensor can work stably for a long time in harsh construction environments and extend its service life. The moisture content sensor based on the frequency domain reflection principle is mainly composed of a transmitting antenna, a receiving antenna, a signal processing circuit and a shell. The transmitting antenna transmits high-frequency electromagnetic waves to the soil. When the electromagnetic waves propagate in the soil, their propagation speed and attenuation are closely related to the moisture content of the soil. The antenna receives the reflected electromagnetic wave signal, and the signal processing circuit analyzes and processes the signal to calculate the moisture content of the soil. The sensor can measure the moisture content of the soil in real time and accurately, providing data support for analyzing the relationship between soil stress and moisture. Moisture content is one of the important factors affecting the stress characteristics of soil. By monitoring the moisture content, we can better understand the stress changes of the soil. The laser displacement sensor is mainly composed of a laser transmitter, a laser receiver, a signal processing unit and a shell. The laser transmitter emits a beam of laser to the soil surface, and the laser receiver receives the reflected laser signal. The signal processing unit calculates the displacement change of the soil surface based on the time difference between laser emission and reception. The laser displacement sensor has the advantages of high measurement accuracy, wide measurement range, and non-contact measurement. It can accurately measure the local deformation of the soil. During the construction of pile groups, timely detection of abnormal displacement of the soil is crucial to ensuring the stability of the pile foundation and construction safety. Three different sensors can be used to monitor the three important data of stress effect monitoring.

[0021] The data acquisition and transmission module includes a data collector and a wireless transmission module. The data collector is mainly composed of a multi-channel analog-to-digital converter, a microprocessor, a memory and an interface circuit. It collects data from multiple sensors, pre-processes them and converts them into digital signals. The wireless transmission module is a low-power, long-distance wireless communication module, mainly composed of a radio frequency chip and an antenna. The radio frequency chip is responsible for data modulation and demodulation, and the antenna is used to transmit and receive wireless signals.

[0022] Specifically, the data collector's multi-channel analog-to-digital converter can simultaneously collect analog signals from multiple sensors and convert them into digital signals. The microprocessor processes and stores the digital signals, including filtering, amplification and preprocessing operations to improve the quality and reliability of the data. The memory is used to store the collected data, and the interface circuit is used to communicate with the wireless transmission module. The multi-channel design can collect data from multiple sensors at the same time, improving data collection efficiency. The data preprocessing function can remove noise and interference, improve data accuracy and reliability, and the memory can save historical data for subsequent query and analysis.

[0023] The data processing and control system includes an industrial computer, which is electrically connected to the data acquisition and transmission module. The industrial computer has a built-in software system, including a data analysis module, which presents the sensor data on the industrial computer.

[0024] Specifically, industrial computers have powerful computing and storage capabilities and can run complex software systems. The data analysis module in the software system can analyze and process the collected sensor data, and draw graphs of stress-time curves, moisture content-time curves, and displacement-time curves for staff to view. The high performance of industrial computers can ensure the efficiency and accuracy of data processing and analysis, and the intuitive graphical interface allows users to view real-time monitoring data and historical data, detect abnormal situations in a timely manner, and take corresponding measures.

[0025] The stress release execution module includes stress release trench and stress release hole construction equipment, the construction equipment includes an excavator and a drilling rig, and the stress release execution module is electrically connected to the data processing and control system.

[0026] Specifically, the stress release execution module is mainly composed of construction equipment such as excavators and drilling rigs, which are used to set up stress release trenches and stress release holes at the construction site. The excavator is used to dig stress release trenches, and the drilling rig is used to drill stress release holes. The stress release execution module is connected to the data processing and control system through cables or wirelessly, and can receive control instructions issued by the data processing and control system. By setting stress release trenches and stress release holes, the stress in the soil can be effectively released, reducing the squeezing of the soil on the pile foundation, ensuring the stability of the pile foundation and construction safety. It is electrically connected to the data processing and control system to realize automatic control and improve construction efficiency and accuracy.

[0027] The power module includes a solar panel and a battery. The solar panel is composed of multiple solar cells. The battery is electrically connected to the solar panel. The power module also includes a charge controller and an inverter. The charge controller is used to control the charging process of the solar panel to the battery to prevent overcharging and over-discharging of the battery. The inverter is used to convert the direct current of the battery into alternating current to power devices that require alternating current.

[0028] Specifically, solar power supply has the advantages of being environmentally friendly and energy-saving, which can reduce dependence on traditional power grids and lower operating costs. The use of charge controllers and inverters can ensure the stability and reliability of the power supply system, extend the service life of batteries, and ensure that the device can work normally in various environments.

[0029] The implementation principle of the embodiment of the present application is as follows: the piezoresistive soil pressure sensor is mainly composed of a sensitive element, a conversion circuit and a housing. The sensitive element is an elastic body with a strain gauge. When subjected to soil pressure, the elastic body deforms, the resistance value of the strain gauge changes, and the conversion circuit converts the resistance value change into an electrical signal output. The housing is made of high-strength, corrosion-resistant and wear-resistant metal material, and the surface is specially treated to improve its corrosion resistance and wear resistance. The soil pressure sensor is vertically buried in the soil to ensure that the sensor is in close contact with the soil and can accurately sense the soil pressure. The piezoresistive sensor has the advantages of high measurement accuracy and fast response speed, and can accurately measure the pressure changes of the soil. After the surface is treated with corrosion resistance and wear resistance, the sensor can work stably for a long time in harsh construction environments, extending its service life. The moisture content sensor based on the frequency domain reflection principle is mainly composed of a transmitting antenna, a receiving antenna, a signal processing circuit and a housing. The transmitting antenna transmits high-frequency electromagnetic waves to the soil. When the electromagnetic waves propagate in the soil, their propagation speed and attenuation are closely related to the moisture content of the soil. The receiving antenna receives the reflected electromagnetic wave signal, and the signal processing circuit analyzes and processes the signal to calculate the moisture content of the soil. The sensor can measure the moisture content of the soil in real time and accurately, providing data support for analyzing the relationship between soil stress and moisture. Moisture content is one of the important factors affecting the stress characteristics of soil. By monitoring the moisture content, we can better understand the stress changes of the soil. The laser displacement sensor mainly consists of a laser transmitter, a laser receiver, a signal processing unit and a shell. The laser transmitter emits a beam of laser to the soil surface, and the laser receiver receives the reflected laser signal. The signal processing unit calculates the displacement change of the soil surface based on the time difference between laser emission and reception. The laser displacement sensor has the advantages of high measurement accuracy, wide measurement range, and non-contact measurement. It can accurately measure the local deformation of the soil. During the construction of pile groups, timely detection of abnormal displacement of the soil is crucial to ensuring the stability of the pile foundation and construction safety. Three different sensors can be used to monitor the three important data of stress effect monitoring.The multi-channel analog-to-digital converter of the data collector can collect analog signals from multiple sensors at the same time and convert them into digital signals. The microprocessor processes and stores the digital signals, including filtering, amplification and pre-processing operations to improve the quality and reliability of the data. The memory is used to store the collected data, and the interface circuit is used to communicate with the wireless transmission module. The multi-channel design can collect data from multiple sensors at the same time, improving data collection efficiency. The data pre-processing function can remove noise and interference, improve data accuracy and reliability, and the memory can save historical data for subsequent query and analysis. The industrial computer has powerful computing and storage capabilities and can run complex software systems. The data analysis module in the software system can analyze and process the collected sensor data, and draw graphs of stress-time curves, moisture content-time curves, and displacement-time curves for staff to view. The high performance of the industrial computer can ensure the efficiency and accuracy of data processing and analysis, and the intuitive graphics The interface allows users to easily view real-time monitoring data and historical data, detect abnormal situations in a timely manner and take corresponding measures. The stress release execution module is mainly composed of construction equipment such as excavators and drilling rigs, and is used to set stress relief trenches and stress relief holes at the construction site. Excavators are used to dig stress relief trenches, and drilling rigs are used to drill stress relief holes. The stress release execution module is connected to the data processing and control system through cables or wirelessly, and can receive control instructions issued by the data processing and control system. By setting stress relief trenches and stress relief holes, the stress in the soil can be effectively released, reducing the squeezing of the soil on the pile foundation, ensuring the stability of the pile foundation and construction safety. It is electrically connected to the data processing and control system to achieve automated control and improve construction efficiency and accuracy. Solar power supply has the advantages of environmental protection and energy saving, can reduce dependence on traditional power grids, and reduce operating costs. The use of charging controllers and inverters can ensure the stability and reliability of the power supply system, extend the service life of the battery, and ensure that the device can work normally in various environments.

[0030] Example 2: A pile group construction method, referring to Figure 1 , including the following steps: Construction preparation: Survey the construction site, determine the pile foundation layout and monitoring device installation location, and install and debug the stress effect monitoring device; Pile foundation construction: Pile foundation construction is carried out according to the pile foundation layout plan. The monitoring device monitors the soil stress changes in real time and transmits the data to the data processing and control system; Stress release and adjustment: The data processing and control system analyzes data and issues control instructions when stress exceeds a preset threshold. The stress release execution module sets stress relief grooves and stress relief holes, continuously monitors during construction, and adjusts stress relief measures based on the monitoring results. Construction monitoring and acceptance: Continuously monitor stress effects throughout the construction process. After construction is completed, inspect the pile group foundation and monitor deformation of surrounding buildings. Conduct acceptance evaluation based on the inspection results.

[0031] Specifically, through detailed surveys in the construction preparation stage and the installation and commissioning of monitoring devices, accurate basic data and guarantees are provided for subsequent construction. Real-time monitoring of stress changes during pile foundation construction enables timely detection of abnormal situations and the adoption of corresponding measures to ensure construction safety. Stress release and adjustment measures can effectively release stress in the soil, reduce the impact on the pile foundation, and improve the stability of the pile foundation. The construction monitoring and acceptance process can comprehensively evaluate the quality and safety of the pile group foundation to ensure that the project meets the design requirements.

[0032] During the pile foundation construction process, the pile foundation construction parameters, including the pile driving speed and pile driving sequence, are adjusted in a timely manner according to the real-time monitoring data. During the stress release and adjustment process, the stress release effect is evaluated according to the monitoring results. When the stress release is insufficient and new stress concentration areas appear, the size, depth and spacing of the stress release grooves and stress release holes are adjusted, or their number is increased.

[0033] Specifically, timely adjustment of pile foundation construction parameters according to real-time monitoring data can effectively control soil stress changes, reduce soil squeezing and damage to pile foundations, and ensure the construction quality of pile foundations. At the same time, it can improve construction efficiency and avoid construction interruptions and rework due to abnormal stress. Timely adjustment of stress release measures according to monitoring results can ensure that stress is effectively released and reduce the subsequent impact of soil on pile foundations. By optimizing the parameters of stress release trenches and stress release holes, the stress release effect can be improved to ensure the stability and safety of pile group foundations.

[0034] During construction acceptance, the pile body integrity and single pile bearing capacity tests are carried out on the pile foundation, and the settlement and displacement of surrounding buildings are monitored.

[0035] Specifically, the low-strain method and the high-strain method are used to detect whether the pile body has defects, cracks, etc., and a static load test is used to determine the bearing capacity of a single pile under a vertical load. Settlement observation points and displacement monitoring points are set up on surrounding buildings. Level meters and total stations are used to regularly monitor the settlement and displacement of buildings. The monitoring data is analyzed to determine whether the building is affected by the pile group construction. The pile body integrity test and the single pile bearing capacity test can ensure the quality and safety of the pile group foundation and ensure that the pile foundation can withstand the design load. The settlement and displacement monitoring of surrounding buildings can timely discover the deformation of the building caused by the pile group construction, and take corresponding measures to repair and reinforce it to protect the safety of surrounding buildings.

[0036] The implementation principle of the embodiment of the present application is as follows: through detailed investigation and installation and commissioning of monitoring devices in the construction preparation stage, accurate basic data and guarantees are provided for subsequent construction. During the pile foundation construction process, stress changes are monitored in real time, abnormal conditions can be discovered in time and corresponding measures can be taken to ensure construction safety. Stress release and adjustment measures can effectively release stress in the soil, reduce the impact on the pile foundation, and improve the stability of the pile foundation. The construction monitoring and acceptance link can comprehensively evaluate the quality and safety of the pile group foundation to ensure that the project meets the design requirements. According to the real-time monitoring data, the pile foundation construction parameters are adjusted in time to effectively control the stress changes in the soil, reduce the squeezing and damage of the soil on the pile foundation, and ensure the construction quality of the pile foundation. At the same time, it can improve construction efficiency, avoid construction interruptions and rework caused by abnormal stress, and adjust the stress release measures in time according to the monitoring results to ensure that the stress is effectively released and reduce the impact of the soil on the pile foundation. The subsequent impact of pile foundations can be improved by optimizing the parameters of stress relief grooves and stress relief holes to ensure the stability and safety of pile group foundations. Low strain method and high strain method are used for detection to check whether the pile body has defects, cracks, etc. Static load test is used to determine the bearing capacity of single piles under vertical loads. Settlement observation points and displacement monitoring points are set on surrounding buildings. Level meters and total station measuring instruments are used to monitor the settlement and displacement of buildings regularly. The monitoring data is analyzed to determine whether the building is affected by the pile group construction. Pile body integrity detection and single pile bearing capacity detection can ensure the quality and safety of pile group foundations and ensure that the pile foundation can withstand the design load. Settlement and displacement monitoring of surrounding buildings can timely discover the deformation of buildings caused by pile group construction, and take corresponding measures to repair and reinforce them to protect the safety of surrounding buildings.

[0037] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A stress effect monitoring device, characterized in that: It includes sensor module, data acquisition and transmission module, data processing and control system, stress release execution module and power supply module; The sensor module includes a soil pressure sensor, a moisture content sensor, and a displacement sensor. Multiple sensors are evenly distributed in a grid pattern in the construction area to form a monitoring network covering the entire construction area. The data acquisition and transmission module is used to collect sensor data and transmit it to a data processing and control system. The data processing and control system analyzes and processes the received data and issues control instructions based on preset stress thresholds and models. The stress release execution module sets stress release trenches and stress release holes at the construction site according to the control instructions. The power supply module provides power for the entire monitoring device.

2. A stress effect monitoring device according to claim 1, characterized in that: The soil pressure sensor is a piezoresistive soil pressure sensor, the surface of which has been treated for corrosion resistance and wear resistance. The moisture content sensor is a moisture content sensor based on the frequency domain reflection principle. The displacement sensor is a laser displacement sensor.

3. A stress effect monitoring device according to claim 1, characterized in that: The data acquisition and transmission module includes a data collector and a wireless transmission module. The data collector is mainly composed of a multi-channel analog-to-digital converter, a microprocessor, a memory and an interface circuit. It collects data from multiple sensors, pre-processes them and converts them into digital signals. The wireless transmission module is a low-power, long-distance wireless communication module, mainly composed of a radio frequency chip and an antenna. The radio frequency chip is responsible for data modulation and demodulation, and the antenna is used to transmit and receive wireless signals.

4. A stress effect monitoring device according to claim 1, characterized in that: The data processing and control system includes an industrial computer, which is electrically connected to the data acquisition and transmission module. The industrial computer has a built-in software system, including a data analysis module, which presents the sensor data on the industrial computer.

5. The stress effect monitoring device according to claim 1, characterized in that: The stress release execution module includes stress release groove and stress release hole construction equipment, the construction equipment includes an excavator and a drilling rig, and the stress release execution module is electrically connected to a data processing and control system.

6. The stress effect monitoring device according to claim 1, characterized in that: The power module includes a solar panel and a battery. The solar panel is composed of multiple solar cells. The battery is electrically connected to the solar panel. The power module also includes a charge controller and an inverter. The charge controller is used to control the charging process of the solar panel to the battery to prevent overcharging and over-discharging of the battery. The inverter is used to convert the direct current of the battery into alternating current to power devices that require alternating current.

7. A pile group construction method, based on a stress effect monitoring device according to claims 1-6, characterized in that: The following steps are involved: Construction preparation: Survey the construction site, determine the pile foundation layout and monitoring device installation location, and install and debug the stress effect monitoring device; Pile foundation construction: Pile foundation construction is carried out according to the pile foundation layout plan. The monitoring device monitors the soil stress changes in real time and transmits the data to the data processing and control system; Stress release and adjustment: The data processing and control system analyzes data and issues control instructions when stress exceeds a preset threshold. The stress release execution module sets stress relief grooves and stress relief holes, continuously monitors during construction, and adjusts stress relief measures based on the monitoring results. Construction monitoring and acceptance: Continuously monitor stress effects throughout the construction process. After construction is completed, inspect the pile group foundation and monitor deformation of surrounding buildings. Conduct acceptance evaluation based on the inspection results.

8. A pile group construction method according to claim 1, characterized in that: During the pile foundation construction process, the pile foundation construction parameters, including the pile driving speed and pile driving sequence, are adjusted in a timely manner according to the real-time monitoring data. During the stress release and adjustment process, the stress release effect is evaluated according to the monitoring results. When the stress release is insufficient and new stress concentration areas appear, the size, depth and spacing of the stress release grooves and stress release holes are adjusted, or their number is increased.

9. A pile group construction method according to claim 1, characterized in that: During the construction acceptance, the pile body integrity and single pile bearing capacity of the pile foundation are tested, and the settlement and displacement of surrounding buildings are monitored.

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