摘要
通过对塑料套管桩复合地基的静载试验并在其周身埋设钢筋应力计,测试塑料套管桩复合地基的荷载传递机制,为以后的塑料套管桩的应用提供一定理论依据。随着荷载的增大,不同深度处桩身轴力均呈现逐渐增大的趋势,但是增加幅度不同,这与土的性质有关。轴力随着深度的加深逐渐减小,塑料套管桩显现出摩擦桩的力学特性并根据理论分析与现场试验对单桩承载力的经验公式进行了修改,并得出侧摩阻力的修正系数为1.30。通过现场堆载试验分析了塑料套管桩的加固效果,得出塑料套管桩软基处理具有可快速堆载,沉降稳定快等优点。
Through the static load tests on the plastic tube piles(TC piles) composite foundation and embedding reinforcement stress gauges,the load transfer behaviors of the TC piles are studied so as to provide certain theoretical basis for their application.The axial forces of piles at different depths all increase gradually with the increasing load,and reduce as the depth increases,but the ranges of reduction are different because of different soil properties.The tests show that the TC piles have frictional characteristics,and the empirical formula of single pile bearing capacity is modified according to the theoretical analysis and field test results.Finally,the lateral friction resistance correction coefficient of 1.30 is got.Besides,the improvement effect of TC piles is analyzed.It is concluded that the TC piles are of advantages of fast-loading and quick stabilization.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2010年第S2期142-145,共4页
Chinese Journal of Geotechnical Engineering
关键词
塑料套管桩
荷载传递机制
静载试验
桩身轴力
侧摩阻力
TC pile
load transfer mechanism
static load test
pile shaft force
lateral friction force
