Emergency Monitoring and Response Analysis of Horizontal Displacement in a Haidian Foundation Pit Under Heavy Rainfall Conditions

DOI: https://doi.org/10.62517/jcte.202506208

Author(s)

Zhongli Geng1,*, Yan Chen1, Yufei Guo2, Chao Tian2, Bo Lang1

Affiliation(s)

1Beijing Polytechnic College, Beijing, China 2Beijing General Municipal Engineering Design & Research Institute Co., Ltd., Beijing, China *Corresponding Author

Abstract

In response to a significant rainfall-induced risk encountered at an excavation site in Haidian District, Beijing, during the 2021 flood season, a zonal, multi-frequency emergency monitoring scheme was implemented. This scheme established a three-tiered monitoring network utilizing high-precision total stations. Monitoring was conducted according to the Second-Class Displacement Monitoring Standard and integrated a graded early warning system. A total of 458 observations over a 20-day period precisely delineated a three-stage characteristic deformation pattern triggered by rainfall: incipient deformation, accelerated development, and a critical state. The study conclusively identified the optimal window for manual monitoring as 13:00–17:00 local time, effectively mitigating data distortion caused by construction activities and nighttime visibility issues. Following the implementation of emergency control measures, the displacement growth rate markedly decreased to below 0.8 mm per day, validating the scheme's effectiveness. Recommendations for enhancing the system through automated upgrades and intelligent early warning optimization are presented.

Keywords

Excavation Engineering; Lateral Displacement; Emergency Monitoring; Heavy Rainfall; Early Warning System

References

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