Super deep underground diaphragm wall deformation automatic real-time monitoring device and operating method thereof

Abstract

The invention belongs to the field of foundation pit engineering, and provides a super deep underground diaphragm wall deformation automatic real-time monitoring device and an operating method thereof. The monitoring device comprises a fiber grating reinforced stress sensor, a fiber grating concrete strain sensor, a denoising analyzing device and an automatic deformation recognizing device. By the aid of the monitoring device and the operating method thereof, horizontal deformation of an underground diaphragm wall can be tracked and monitored in real time, deforming data can be automatically collected and analyzed, real-time capacity, continuity, effectiveness and reliability of monitoring can be guaranteed, processing efficiency of monitoring data of horizontal deformation of the underground diaphragm wall can be improved, and information sharing level of monitoring data of horizontal deformation of the underground diaphragm wall can be raised, the deformation of foundation pits is guaranteed in a controllable range, constructing risks of deep foundation pits can be reduced, and references can be provided for similar foundation pit engineering.

Description

technical field [0001] The invention belongs to the field of foundation pit engineering, and in particular relates to an automatic real-time monitoring device for deformation of an ultra-deep underground diaphragm wall and a working method thereof. Background technique [0002] Due to the requirements of urban construction and economic development, the scarcity of land resources in the city center makes the foundation pit engineering have a trend of "deep, large, tight, close, and difficult", that is, the foundation pit is getting deeper and the span is getting wider and wider. Larger, the construction period is getting tighter and closer, and the surrounding existing buildings are getting closer and closer, and the construction control is getting more and more difficult. There are many factors affecting the safety of deep foundation pit construction, such as high confined water, silty soft soil, karst, karst caves and other unfavorable geology. There are great differences ...

AI Technical Summary

Problems solved by technology

The horizontal deformation monitoring technology of underground diaphragm walls has been developed in the field of foundation pit engineering. The current monitoring methods still mostly use inclinometers for manual measurement. Problems, such as the inclinometer pipe is often damaged during the embedding process, or the inclinometer probe is difficult to lower due to the local deformation of the inclinometer pipe, or it is difficult to lift the inclinometer probe after it is accidentally lowered, which not only leads to the failure of the monitoring point, but also directly leads to the failure of the measuring point. The oblique probe is scrapped, resulting in data loss, and it is difficult to ensure the accuracy of monitoring; for deep foundation pits, the monitoring efficiency of using an inclinometer is not high, and the existing monitoring frequency (1-2 times / day during the excavation stage) is difficult to meet the requirements of the project. Safety control needs for monitoring information; in addition, for ultra-deep and super-large foundation pits, it is often very difficult to obtain deformation data of deep underground diaphragm walls, and the reliability of inclinometer data for underground diaphragm walls with a depth of more than 40 meters is greatly reduced

More importantly, the current processing and analysis of manual inclinometer data requires manual analysis and processing, resulting in untimely transmission and sharing of monitoring information, and causing information blind spots for the construction safety control of deep foundation pits. Safety accidents in foundation pit engineering are also common

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