论文部分内容阅读
在某高速铁路低矮路基DK849+557和DK849+575断面(路基高度3.0m和3.2m)进行了路基填筑试验和现场原位1∶1动载模拟试验。路基填筑试验表明,静态填筑荷载应力基本符合半球形理论假设,桩间土应力实测值与计算结果较为一致。550万次模拟动载试验表明,整个过程中路基不同深度处静态应力、动态应力和动变形水平略有波动,土拱基本处于稳定状态;动应力在路基土拱中基本按照均质体进行传递;提出了路基面动荷载引起CFG桩桩网复合地基桩间土应力采用Boussinesq公式进行计算的方法。
The embankment filling test and in-situ 1: 1 dynamic simulation test were carried out on the DK849 + 557 and DK849 + 575 sections (the height of subgrade of 3.0m and 3.2m) on a low-speed high-speed railway subgrade. Subgrade filling test shows that the static filling load stress basically conforms to the hemispherical theory assumption, the measured soil stress between the pile and the calculated results are more consistent. 5.5 million times of simulated dynamic tests show that the static stress, dynamic stress and dynamic deformation level fluctuate slightly at different depths of the subgrade in the whole process, and the soil arches are basically in steady state. The dynamic stress is basically transmitted in the soil subgrade as homogeneous body The method of Boussinesq formula for calculating soil stress between CFG pile foundation and pile foundation caused by dynamic load of subgrade is proposed.