基于数值模拟的高填方红黏土地基强夯试验研究

Numerical Simulation-based Dynamic Compaction Test of a High-fill Red Clay-filled Foundation

为减少红黏土高填方地基试夯次数,以云南省在建大型场平工程项目为例,采用Abaqus数值软件模拟不同夯击能级下的地基有效加固范围,综合施工效率、经济投入等比选分析,确定该红黏土填方地基强夯施工最优能级。基于数值模拟所得的强夯能级及加固范围进行现场试夯试验,并通过平板载荷、动力触探等技术手段,对强夯后的红黏土填方地基进行检测,检测结果满足主体结构设计的强度和变形要求,可为高填方红黏土地基处理提供参考。

To minimize the frequency of dynamic compaction passes on high-filled red clay foundations,a large-scale earthwork project currently underway in Yunnan Province is taken as the study case,and the Abaqus numerical software is used to conduct simulations for determining the effective reinforcement range of the foundation across various compaction energy levels.A comprehensive comparative analysis,incorporating construction efficiency and economic factors,is then performed to identify the optimal energy level for dynamic compaction of the red clay filled foundation.Field compaction tests are subsequently carried out,guided by the energy levels and reinforcement ranges obtained from the numerical simulations.Additionally,techniques such as plate loading and dynamic probing are utilized to assess the red clay filled foundation after dynamic compaction.The results from these tests confirm that the post-compaction foundation meets the strength and deformation requirements specified by the main structural design.These research findings provide invaluable guidance for addressing challenges associated with high-filled red clay foundations.