Monitoring Analysis and Safety Evaluation of Deep Foundation Pit under Complex Conditions

Abstract

The horizontal displacement of pit top and horizontal displacement in deep soil of underground garage deep foundation pit in Radio and TV centre of Shandong province was analyzed. Combing the deformation control value of foundation pit, we thought that the supporting structure was safe and reliable. The supporting structure could not only meet the strength requirements but also meet the deformation control requirements. This deep foundation pit was a successful case under complex conditions. Analyzing the variation rules between monitoring data and construction time, the instructive conclusions were obtained. The deformation of foundation pit external corner was largest. The external corner should be avoided in foundation pit. The dynamic loads around foundation pit had a great influence on the safety and stability of pit. The rainfall was disadvantage factors, so the construction of foundation pit should keep away from the rainy season. The foundation pit floor could limit soil deformation and improve the safety of pit. The pit floor should be constructed as early as possible.

Application of Comprehensive Evaluation Method to Foundation Pit Engineering

“…But establish a reasonable membership function is very difficult, need to constantly test and summary. In this paper, the determination of membership function is referenced the literature [6] , established a trapezoid and trapezium membership function. pit in safe state membership function…”

Safety Management System Prototype/Framework of Deep Foundation Pit Based on BIM and IoT

“…Hu et al [7] identified design and construction factors such as insufficient embedded pile depths and insufficient anchor pull-out resistance as being responsible for foundation pit accidents. Having dynamic loads around deep foundation pits is also a factor in pit collapse [8]. In addition, Xu et al [4] also identified several main risk events that can cause foundation pit accidents, including failure to follow engineering design, collapse of pit bracing structures, falling from a significant height due to a lack of edge protection, and collapse of the pit due to excavation.…”