论文部分内容阅读
采用可视化模型箱,进行桩端刺入离心模型试验。考虑纯砂土、分层介质两种土体情况,研究上覆软弱夹层对桩端刺入的桩侧摩阻力和桩端阻力的发挥性状及阻力随沉降的发展模式的影响。试验表明:分层介质中达到极限桩端阻力所需的桩端刺入量约为纯砂土中的一半,且当桩土相对位移很小时,桩端附近的土体的横向位移和沿深部方向的影响范围基本形成,桩端砂土有比较明显的椭球孔形扩张态势。
Using a visual model box, pierce the centrifuge model test. Considering the situation of pure soil and stratified medium, this paper studies the effect of pile-side friction and pile-end resistance exerted by overlying weak interbed and the influence of resistance on the development mode of settlement. The test results show that the required penetration of pile tip in layered media is about half that of pure sand, and when the relative displacement of pile-soil is small, the lateral displacement of soil near the pile tip and the horizontal displacement along the deep The direction of the impact of the basic form, pile end of the sand there is a more obvious expansion of elliptic hole situation.