The Application of Principal Component Analysis in Stability Evaluation of Foundation Pit

Abstract

The foundation pit stability is the key and difficult point in foundation pit engineering research. The stability and safety of the foundation pit should be ensured not only by its excavation, but also by the surrounding buildings.Because the stability of foundation pit is decided by many complicated factors, it has a certain randomness.This paper adopts the principal component analysis method combined with engineering examples to calculate and analyze the six influencing factors that affect the stability of foundation pit: land subsidence, groundwater level, pile top settlement, horizontal displacement of pile top, reinforced concrete brace and inclination.The results show that inclination and pile top displacement have the most important influence on the stability of foundation pit. According to this study, the principal component analysis method has higher accuracy in the stability evaluation of foundation pit and has certain reference value, which can provide theoretical basis for the stability evaluation of foundation pit in related projects.