桩长对水泥搅拌桩加固效果影响的数值研究
Numerical Study on Influence of Pile Length on Reinforcement Effect of Cement Mixing Pile

长三角地区的道路工程建设不时遇到软土，此类软土的厚度分布不均匀，主要成分为淤泥质土、粉质粘土和粉砂土，具有显著的区域特征，复合地基法在处理用作此类软土地基区域具有施工周期短、处理效果好等明显特点。目前水泥搅拌桩是目前长江三角洲软土地基复合地基处理的一种典型方法。数值试验作为岩土工程主要研究方法，在工程应用中已日趋成熟。研究基于524国道常熟莫城至辛庄段改扩建工程为依托，根据实测详细勘察阶段的工程地质勘察的岩土参数设定固定的参数模型，以桩身长度为变量，通过数值试验的方法研究水泥搅拌桩水泥搅拌桩桩长对复合地基加固效果。
The road engineering construction in the Yangtze River Delta region often encounters soft soil. The thickness of this kind of soft soil is unevenly distributed, and the main components are muddy soil, silty clay and silty sand, which has significant regional characteristics. The composite foundation method has the obvious characteristics of short construction period and good treatment effect in treating the area used as this kind of soft soil foundation. At present, cement mixing pile is a typical method for foundation treatment of composite foundation in soft soil area of Yangtze River Delta. As the main research method of geotechnical engineering, numerical test has become more and more mature in engineering application. Based on the reconstruction and expansion project of Changshu Mocheng Xinzhuang section of national highway 524, a fixed parameter model is set according to the geotechnical parameters of engineering geological survey in the measured detailed survey stage, and the effect of cement mixing pile length on composite foundation reinforcement is studied by numerical test with pile length as variable.