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本文所述的软地基上高填土的稳定方法是国外工程中采用过的。该工程跨越一条河谷,建有一座6孔200米长的预应力桥,桥头接线的填方地段最高填土约达15米高。河谷地基上层是2.5～3.0米厚的软质垆坶土层,再往下为砂砾层,最深处距地表约10米。根据三轴压缩试验的结果,垆坶层的粘结力 C=0.2公斤/平方厘米,内摩擦角(?)=13°。以同样方法试验填方土壤的 C=0.15公斤/平方厘米,(?)=20°。稳定计算按公式
The stability of high fill on soft ground as described in this paper is adopted in foreign projects. The project spanned a river valley, built a 6-hole 200-meter-long prestressed bridge, the bridge fill the landfill wiring up to about 15 meters high. The valley floor is 2.5-3.0 m thick upper soft soil layer, then down to the gravel layer, the deepest from the surface of about 10 meters. According to the results of the triaxial compression test, the cohesion force of the ballast layer is C = 0.2 kg / cm and the internal friction angle (?) = 13 °. Soil C = 0.15 kg / cm 2 (?) = 20 ° was tested in the same way. Stable calculation according to formula