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通过有限差分的计算方法,用FLAC建立公路地基的流～固耦合模型,以孔隙水的排出过程体现地基的沉降变形过程。采用青临高速公路典型路基断面,并模拟实际施工过程中路基的分层加载过程,对公路地基不同施工阶段(施工期、竣工后)的固结沉降过程进行分析计算,并与现场实测的结果分析对比,对地基的工后沉降速率、最终固结时间和最终沉降量进行预测和分析。
Through the finite difference method, FLAC is used to establish the flow-solid coupling model of highway foundation. The settlement process of the foundation is demonstrated by the discharge process of pore water. Adopting the typical subgrade section of Qinglin Expressway and simulating the process of subgrade loading in the actual construction process, the consolidation and settlement process in different construction stages of the roadbed (construction period and after completion) is analyzed and compared with the field measurement results Analysis and comparison, the foundation of the post-construction settlement rate, the final consolidation time and final settlement forecast and analysis.