In deep foundation pit construction, precisely controlling confined water levels, preventing sudden inrush, and controlling deformation of the surrounding environment are core challenges. To solve these problems,Shanghai Construction No.2 Construction Groupinnovatively developed an intelligent dewatering control system for foundation pits. This system represents a major advance in deep foundation pit dewatering technology, achieving a comprehensive upgrade from "manual experience" to "automatic control."

    With the rapid development of urban construction, deep foundation pit projects are increasing in number, especially in regions rich in groundwater, where deep foundation pit construction faces severe challenges from confined water risk. How to precisely controlconfined water levels, prevent sudden inrush, and control deformation of the surrounding environment has become a core challenge in construction technology. Traditional manual measurement and manual pump start/stop methods respond slowly and have low fault tolerance, failing to meet the safety and efficiency requirements of deep foundation pit construction. Therefore, Shanghai Construction No.2 Construction Group independently developed an intelligent dewatering control system for foundation pits, aiming to enhance the informatization, automation, and intelligence level of foundation pit dewatering construction.

Water level monitoring module

    Pump monitoring module: The system automatically starts and stops pumps according to preset upper and lower safety water level limits, achieving intelligent water level control. This not only improves work efficiency but also greatly reduces safety risks caused by improper manual operation.

Pump control module

    Warning display module: Equipped with powerful warning and alarm functions. Once the water level exceeds the safe range or equipment abnormalities occur, the system immediately triggers audible and visual alarms and notifies relevant personnel via SMS, phone calls, and other means. At the same time, cloud platform pop-up alerts respond synchronously, ensuring timely transmission and handling of information.

    The system has built-in multiple anomaly identification mechanisms that can effectively respond to various sudden faults in the complex environment of construction sites. For example, when a water level monitoring sensor is damaged, the system forcibly starts the pumps within its control group and simultaneously issues an alarm; when pump equipment loses power or fails, the system automatically starts other pumps within the control group and reports abnormal data within 5 minutes; when the dewatering system experiences a network interruption, the system triggers a network anomaly alarm. These mechanisms ensure that the system maximizes foundation pit safety and dewatering water level stability under emergency conditions.

    With the support of a "cloud platform," the system enables visualized and data-driven remote monitoring and control. It integrates a fourfold alarm mechanism of local LED display + mobile APP + web page + SMS pop-up; alarm parameters can be set remotely, abnormal conditions are automatically identified, and minute-level warning response is achieved. The visualized large-screen terminal displays in real time all status data such as water levels, pumps, and observation wells, and supports displaying historical water level change curves and layout logic. The data backend management supports functions such as dewatering area configuration, equipment status monitoring, and warning contact settings, and all collected and alarm data can be exported for analysis.

    This dewatering system has been applied on a large scale in multiple projects, including the Dongjiadu Project and the Xinchangcheng Project in Huangpu District. The system has also been successfully applied in the Underground Transportation Hub and Supporting Works of the South Area of Pudong Airport. The foundation pit of this project covers an area of more than 60,000 square meters, with an average depth of more than 30 meters, and more than 80 confined water dewatering wells were managed and controlled in the project. In practical application, the water level remained stable and fluctuated below the safe water level line of 1 meter, and dewatering operations achieved automatic operation, remote visualization, and unattended operation. During construction, there was no sudden inrush and no abnormal structural settlement, and dangerous situations were detected and alarmed in a timely manner on multiple occasions, fully verifying the reliability and efficiency of the system.

Foundation pit water level risk warning and control cloud platform (Pudong Airport South Area Project)

Water level acquisition module and on-site alarm display terminal (Pudong Airport South Area Project)

Pump monitoring module (Pudong Airport South Area Project)

 Confined water level control effect of the intelligent dewatering system inside the pit

    The successful application of the intelligent dewatering control system marks a comprehensive upgrade of deep foundation pit dewatering technology from "manual experience" to "automatic control." Through the application of this innovative approach, Shanghai Construction No.2 Construction Group has not only improved the safety and efficiency of deep foundation pit construction but also provided strong technical support for the efficient development of urban underground space.

    In the future, with continuous technological progress and expanding application scenarios, the intelligent dewatering control system for foundation pits is expected to be promoted and applied in more projects, injecting new vitality into urban construction and development.