摘要
采用土的弹塑性模型和弹性力学理论,分别对桩周土和桩身应力的传递及变形进行了分析,建立了单桩的受力模型,并得到了其理论解,证明单桩承载力随成桩时间的增长而有明显的提高;通过某工程的粉喷桩单桩载荷试验资料,分析了在饱和土层中,粉喷桩复合地基单桩承载力的时间效应问题,且地下水对其也具有较大的影响。掌握单桩承载力的时间效应规律,对粉喷桩复合地基的优化设计及确定载荷试验的时间具有重要的意义。
Using elasto-plastic model and elastic mechanics theory,the stress transfer and deformation of pile along the pile are analysed respectively. The calculation model of single pile is built and the theoretic solutions are gained. The increase of bearing capacity of single pile is obvious with time. According to the data of static loading test for single cement soil pile,the time effect on bearing capacity of single cement soil pile is analysed in the saturated soil. The influences of groundwater on the bearing capacity are considered too. The presented results are of important significance to optimizing design of the cement soil pile composite foundation and deciding the time of the loading test.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2002年第4期586-589,共4页
Chinese Journal of Rock Mechanics and Engineering
关键词
粉喷桩
承载力
时间效应
龄期
cement soil pile,bearing capacity,time effect,age
