深层水泥搅拌桩承载特性研究进展分析

Research progress of bearing characteristics of deep cement mixing pile

深层水泥搅拌桩以其直径大、自动化控制程度高等优点,在桥隧工程和港口工程地基加固中得到广泛应用。认识深层水泥搅拌桩的受力机理与破坏模式是合理设计与工程利用的前提,深层水泥搅拌桩的长期强度与变形特征也亟待探究。围绕这些问题,对近年来国内外尤其是日本及中国香港地区在深层水泥搅拌桩受力机理、破坏模式及强度增长方面的研究进展进行分析,提出未来要重点关注深层水泥搅拌桩的长期强度、模量增长及“多米诺骨牌式”破坏方式等影响因素,以支撑深层水泥搅拌桩的设计与施工。

Deep cement mixing pile is widely used in the foundation reinforcement of bridge and tunnel engineering and port engineering for its advantages of large diameter and high degree of automation control.It is the premise of rational design and engineering utilization to clarify the mechanical mechanism and failure mode of deep cement mixing pile.The long-term strength and deformation characteristics of deep cement mixing pile also need to be explored.Based on these problems,we analyzed the research progress in the mechanical mechanism,failure mode and strength growth of deep cement mixing pile at home and abroad in recent years,especially in Japan and Hongkong,China.It is proposed that attention should be paid to the long-term strength and modulus growth as well as the"domino type"failure mode of deep cement mixing pile in the future design,so as to support the design and construction of deep cement mixing pile.