The pressure differential static level settlement monitoring system is used for long-term monitoring of infrastructure settlement such as foundations, foundation pits, tunnels, tracks, high-speed railways, highways, mountains, slopes, dams, power stations, base towers, and large storage tanks.
1. Overview of the pressure differential static level instrument settlement monitoring system:
The pressure differential static level instrument settlement monitoring system is used for long-term settlement monitoring of infrastructure such as foundations, foundation pits, tunnels, tracks, high-speed railways, highways, mountains, slopes, dams, power stations, base towers, and large storage tanks.
From construction to the end of use, the project hopes to meet the design quality standards, ensure safe use, and extend the service life as much as possible. The purpose of the main body settlement monitoring of the project is to predict the excessive vertical deformation or sinking or floating of the building that may occur during the construction and use of the main structure, and to provide timely feedback on the safety of the building to ensure safety and reliability. It can also provide theoretical basis and experience for future engineering design.
(I) Purpose of settlement monitoring by pressure differential static level
1, Evaluate the safety status of the project based on the data analysis of on-site settlement monitoring;
2, based on data collection, analyze and predict the monitoring data, issue early warnings and alarms, and submit the settlement monitoring report and analysis report to the owner, supervisor, construction unit and safety management group in a timely manner to provide technical support for safety management decisions;
3, accumulate data and information to provide experience for future engineering design and construction;
4、After the settlement monitoring data is analyzed, processed, and necessary calculations and judgments are made, the construction quality is predicted and feedback is given.
(II) The significance of settlement monitoring by pressure differential static level
1、Use modern information technology to guide construction and provide reliable and continuous settlement monitoring data.
2, timely organize monitoring information, establish information feedback data through data processing, compare the on-site measurement results with the predicted values, and judge whether the safety status of the project meets the expected requirements.
3, ensure the safety of buildings through engineering settlement monitoring, and compare the monitoring results with the theoretical predicted values, and use the inverse analysis method to seek theoretical formulas that are closer to reality to guide other similar projects.
(III) Sedimentation is a slow process. In any short period of time, the change in the liquid level of the liquid storage tank will be very subtle. Whether this tiny change can be detected in real time and accurately, reflecting the tiny settlement of the foundation, and preventing it from happening is the key to measuring the quality of a static level product. This places high demands on the real-time and precision of the liquid level sensor integrated in the system. Since it is installed outdoors, the temperature coefficient, waterproofness, and lightning protection of the liquid level sensor are all key technologies. In addition, the installation size and easy replacement of the static level are also important technical indicators. It is composed of a high-precision liquid level meter, a liquid storage tank, a protective cover, a communication gas, a water pipe and other components.
The differential pressure static level is a precision instrument based on the principle of communicating vessels. It measures the relative changes in the liquid level heights of several interconnected liquid storage tanks installed at the measured point and the liquid level heights of the measuring base point (fixed point) to infer the relative position settlement changes of each liquid storage tank installation position.
2. Framework and composition of the pressure differential static level settlement monitoring system:
(I) Framework diagram
(II) System composition:
1, hydraulic pressure differential static level PT500-SZY10 Quantity: several (at least2sets or more);
2、Liquid storage/refillPT500-CYG01 Quantity: several (1piece/set);
3、4G、Outdoor electric box Quantity:1pcs;
8、10mmLiquid pipe Quantity: several meters (calculated according to the distance at the current project site);
9、Communication cable Quantity: several meters (calculated according to the distance of the current project site);
10、Wiring protection tube Quantity: several meters (calculated according to the distance from the current project site);
11、Conduction medium (water or antifreeze) Quantity: several liters (calculated according to the distance from the current project site);
Three, Pressure differential hydrostatic level instrument settlement monitoring system performance parameters:
(I) Main performance parameters of hydraulic pressure differential hydrostatic instrument
1、Range 0～0.5m；1m；2m；5m；10m；
2、Comprehensive accuracy ±0.1%FS；
3、Output signal RS485-RTU（Height and temperature）
4、Resolution 0.01mm
5、Power supply voltage 24VDC(9～30VDC)
6、Working current <50mA(Varies with the range)
7、Lifespan ≥10010,000 times
8、Ambient temperature -40～70℃
9、Humidity/Dew point Humidity90%, no condensation
11, protection level IP67
12, dimensions 85*85*85
(II),4Gmain performance parameters of wireless communication module
1、Operator: China Mobile 4G
2、Data transmission mode: transparent transmission/no sleep
3、Communication protocol:MODBUS RS485-RTU
4、Maximum number of slave access:256points (recommended less than64points)
5, Power supply:12-24VDC
6, Receive and transmit current is less than100mA
7, Contains flow card,500M/month*3yearspan>
(III) Main performance parameters of cloud monitoring platform
1、Equipment configuration, collection, analysis
2、Equipment grouping, networking, adding, deleting management
3、Sedimentation data, real-time data monitoring display
4、Data statistics, query, download
5、Data warning, record, send to users
