【摘要】 软弱下卧土层直接加固法是一种新型软土地基处理方法.该方法充分发挥了上部良好土层的力学性能,在满足工程建设要求的同时,避免了大量土方的开挖和堆放,具有节约成本,缩短工期,清洁环保等优点.简要介绍了软弱下卧土层直接加固法的受力机理和施工方法,基于ABAQUS有限元软件,对该法加固后基础的沉降、应力分布、桩身压缩沿深度变化、桩土应力比及桩土模量比等进行了初步探讨,并与加固前的天然地基进行了对比分析.研究结果表明,在相同上部荷载作用下,采用软弱下卧土层直接加固法能有效地减小基础沉降,显著提高地基承载力,降低地基土的应力水平.更多还原

【Abstract】 Directly reinforced method for the inter-layered soft soil is a kind of new treatment method of soft soil foundation.The mechanical properties of upper better soil is to be taken adequately by this method and the demand of engineering construction is to be meet.Meanwhile,the great number of earth excavation and stacking is avoided,and the advantages of saving cost,shortening the construction period,cleaning and environmental protection are owned in this method.In this paper,the stress mechanism and construction method is briefly introduced.Based on ABAQUS,foundation settlement,stress distribution,compression deformation along pile bodies,pile-soil stress ratio and pile-soil modulus ratio after reinforced by this method are preliminary studied and compared with the un-reinforced natural foundation.The results demonstrate that,under the same top load grade,the foundation settlement is reduced effectively,the base bearing capacity is improved obviously,and the stress level in soil is decreased in the foundation using directly reinforced method for weak soil layers.更多还原