【摘要】 采用4种条件(层重固结法,层重未固结法,孔隙水压力求孔压系数法,孔隙气压力求孔压系数法)下的最终沉降计算方法,和简化的考虑施工加载过程的非饱和土一维固结方法,对某公路高路堤的沉降进行计算分析,并与实测资料相比较。结果表明:公路路堤各土层在自重作用下固结已经完成,甚至有超固结,简化的非饱和土一维固结计算方法可以满足计算精度的要求;同时揭示,公路路堤沉降监测与一般地基的沉降监测是不同的,对不同的问题应该研究布设测点的方法。更多还原

【Abstract】 Four conditions were adopted in calculating the final settlement of highway embankment. A simplified consolidation method was introduced in the calculation of consolidation of unsaturated soils considering the step by step loading process.The conditions are those that the soil in embankment has already consolidated under its selfweight,and has not been consolidated under its selfweight,pore pressure parameter is calculated in connection with pore water pressure,and pore pressure parameter is determined in relation to pore air pressure. The calculation results are compared with the measured data. The results show that every layer of the highway embankment is consolidated completely,and even overconsolidated, and also that the simplified consolidation method used in this paper is applicable for highway analysis with reasonable accuracy. The leveling survey of highway embankment is quite different from that of common soil base. This is a specific question that should be studied according to its requirements.更多还原