Foundation pit online monitoring
The excavation of deep foundation pits is a dynamic process. Due to various complicated factors, it is difficult to predict the possible problems from the existing theory. Once the supporting structure is unevenly loaded, the soil will lean and heavy will cause the foundation pit to collapse. Excavation of foundation pits also brings hidden dangers to the safety of surrounding buildings. If the surrounding soil is unstable, it is likely to cause damage to the upper structure and bring about bad social impact. Therefore, monitoring the foundation pit is an indispensable part in the construction of the foundation pit. At present, the foundation pit monitoring is mainly based on manual monitoring, and the monitoring workload is large. Due to factors such as weather, personnel, and site conditions, human error exists. The technical parameters cannot be monitored in real time and the summarization analysis is lagging behind. It is difficult to grasp the problems and risks in the project in a timely manner. All these affect the safety production and management of the project. Online monitoring combined with new technologies such as cloud computing and big data can not be affected by adverse weather, provide continuous data, support real-time viewing, avoid man-made errors, and truly ensure data stability and reliability.
Foundation pit online monitoring system architecture
The sensors of each monitoring project are connected to the wireless nodes. The data is uploaded to the cloud platform's control center through the built-in wireless transmission module of the cloud gateway. The cloud platform can provide real-time display, automatic alarm and data storage functions. The customer accesses the server through a mobile phone or a PC and obtains SMS alarms, data analysis and other related services.
Online monitoring layout
System field deployment
The pit site can use Zigbee technology with low power consumption, ad hoc network, wireless and other advantages, to solve the inconvenience of the construction site power supply, wiring, communication inspection and other issues. The wireless node integrates the vibrating wire, inclinometer sensors, and other third-party RS485 devices that consume less than a certain current (generally defined as 100mA). The Zigbee coordinator collects the integrated DTU module built into the intelligent gateway. The upcoming data is sent to Zhiwu Cloud to realize the information management of the monitoring data of the foundation pit.
In the process of network system deployment, comprehensive consideration must be given to factors such as transmission distance, communication quality, low power consumption, on-site complex construction environment, and a rationally designed and economical networking system. And through the standardized installation process, ensure the stability and reliability of the system.