摘要
为评价松软土地区高速铁路路涵过渡段采用倒梯形级配碎石并掺水泥处理方法的适宜性,采用弦式和电阻式土压力计测试过渡段在施工期及联调联试期CFG桩顶和桩间静土压力、基床底层表面及该位置以下50cm处的动土压力变化特征。结果表明:离涵洞中心不同位置的桩顶和桩间土压力,随施工荷载的变化而变化,且桩顶土压力对加载变化更加敏感;过渡段的动应力在纵向上表现为"W"形,其最大值出现在距涵洞中心10m位置处。
Graded gravel added cement in trapezoidal shape was employed to reduce irregularity of transition sections from subgrade to culvert in high-speed railways. To evaluate the suitability, pressure gauges of vibrating string or resistor types were embedded in one section. Static or dynamic soil pressures in subgrade-culvert transition during construction or passing of test cars have been monitored. Pressures in CFG piles or in soils between piles at foundation base are considered in the static test, and pressures on the surface or 50cm below the subgrade bed are observed in the dynamic test. It shows that the pressure on pile top or soils is different with different loadings, and the pressure of top-pile is more sensitive than that of the soils. The dynamic pressures in transition section are in the shape of “W” in line direction. It is about 10m from the centre of culvert where the maximal pressure appears in the dynamic test.
出处
《土木工程学报》
EI
CSCD
北大核心
2012年第8期158-165,共8页
China Civil Engineering Journal
基金
太原高新区科技项目(2008-CXJJ-34)
中国铁建股份有限公司科技研究开发计划课题(09-30C)
关键词
路涵过渡段
试验研究
动态响应
土压力
subgrade-culvert transition section
experimental investigation
dynamic response
soil pressure
作者简介
沈宇鹏（1977-），男，博士，讲师。主要从事路基工程与岩土工程方面的研究。
杜嘉俊（1965-），男，硕士，教授级高级工程师。主要从事桥梁工程建造技术方面的研究。
汪梨园（1982-），男，硕士研究生，工程师。主要从事高速铁路无砟轨道辅设技术方面的研究。
毛远凤（1987-），女，硕士研究生。主要从事高速铁路路基过渡段方面的研究。
