摘要
在分期堆载预压过程中,需要对每一级堆载以及对下一级堆载高度下进行地基稳定性计算,并根据计算结果确定加堆高度和时间。计算时,根据不同堆载高度下的比奥固结理论有限单元法计算结果,用考虑地基强度增长总应力法和考虑超孔隙水压力的有效应力法分别进行地基稳定性计算,以保证地基在每一次加载时的稳定性。结合具体的工程实例,得到了一个很有用的结论:考虑地基土强度增长的总应力法和考虑超孔隙水压力的有效应力法进行地基稳定性计算所得的安全系数趋于相等。
In the process of the preloading, the foundation stability is calculated from one stage of filling height to next stage of filling height. According to the foundation stability the filling height and the loading time of the next stage could be given out. According to the results of Biot's consolidation theory in each filling height, the foundation stability is calculated with the total stress method considering the strength increase and the effective stress method considering the over-static water pressure. Then an useful result is that the foundation stability factors calculated by the two methods are approximate equality.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第6期955-958,共4页
Rock and Soil Mechanics
基金
湖北省水电工程施工与管理重点实验室基金项目(三峡大学)(No.HEF200405)
武汉科技学院基金项目(No.20043231)资助。
