大同市御河城区段综合整治工程南环桥—京大高速桥段堤基工程地质问题及评价

Engineering Geology Problem Evaluation on the Embankment Foundation of the Urban River Section from Nanmhuan Bridge to Jinda Motorway Bridge in Datong Yu River Comprehensive Regulation Project

文中对于大同市御河城区段综合整治工程中南环桥至京大高速桥段堤基的工程地质问题进行了分析并作出了相应的评价,内容包括:堤基持力土层的工程地质特性分析,低液限粉土层的湿陷问题,砂层的地震液化,堤基的渗透变形和渗透稳定分析,堤基渗透变形的类型及临界水力比降和允许水力比降的确定以及开挖施工基坑临时土壤边坡的确定等。最后还提出了相应的技术建议。

The paper analyzes engineering geology problems in the embankment foundation of the urban river section from Nanhuan Bridge to Jinda Motorway Bridge in DaTong Yu River Comprehensive Regulation Project, and conducts the evaluation on these problems. Its contents include engineering geology characters of bearing capacity strata in the embankment foundation, collapsibility issue of the low liquid limit silt stratum, earthquake liquefaction in sand stratum,seepage in the embankment foundation,seepage defomation and seepage stability analysis of embankment foundation embracing to determine the seepage deformation type,critical and permissible hydraulic gradient, determining the temporary soil side slope of the excavated construction pit etc. At last corresponding technical suggestions are presented.