论文部分内容阅读
近些年国内进行了多处的人工堆山工程,其特点是堆载分层施加、荷载分布面积大、施工期较长且总荷载非常大,常规地基处理不能满足堆山荷载对地基承载力的要求。结合堆山工程逐级施加的堆土荷载之间通常有较长时间间隔的特点,认为地基可在分级堆填间歇时间内发生一定程度固结有效应力提高,导致土体强度增加,因此地基承载力也产生相应的提高,利用固结引起土体强度增长导致的承载力提高是堆山工程成功的关键。应用有效应力法分析了土体固结引起强度增长的机制和计算,提出不排水条件下考虑土体强度增长的地基承载力分析方法,运用该理论对比分析了两个人工堆山工程案例,对堆山工程提出建议可供类似工程参考。
In recent years, many domestic manual pile-hill engineering has been carried out, which is characterized by pile loading and stratification, large load distribution area, long construction period and very large total load. Conventional foundation treatment can not meet the requirement of pile foundation loading Request. In combination with the pile-soil engineering applied by pile-stacking project, there is usually a long time interval between pile-soil loads. It is considered that the effective consolidation of soil can be increased to a certain extent during the intermittent filling of grading, resulting in the increase of soil strength. Therefore, The force also has a corresponding increase, the use of consolidation caused by soil strength caused by the increase of bearing capacity is the key to the success of the pile hill project. The effective stress method is used to analyze the mechanism and calculation of the strength increase caused by soil consolidation. The analysis method of the bearing capacity of foundation considering the increase of soil strength under undrained condition is proposed. By using this theory, Heap Hill project to make recommendations for similar projects for reference.