浅析大直径PC桩挤土效应及消散措施

Analysis of the Squeezing Effect and Dissipation Measures of Large-diameter PC Piles

预应力管桩具有质量易保证、施工效率快、造价低等特点。本文依托南美某地铁项目对大直径PC桩单桩、群桩挤土效应进行分析。根据现场实测数据结合有限元解析沉桩土体径向位移、水平位移以及土体径向及水平位移随土体深度变化规律,并提出消散措施削减挤土效应,为类似沉桩工程施工技术提供参考。

Pre stressed pipe piles have the characteristics of easy quality assurance,fast construction efficiency,and low cost.This article analyzes the soil squeezing effect of large-diameter PC pile single pile and group pile based on a subway project in South America.Based on on-site measured data combined with finite element analysis,the radial and horizontal displacement of pile driving soil,as well as the variation law of soil radial and horizontal displacement with soil depth,are analyzed.Dissipation measures are proposed to reduce the squeezing effect,providing reference for similar pile driving engineering construction techniques.