摘要
通过现场试验,表明线路中心处加筋垫层中横向格栅拉力值最大,双层格栅中横向格栅拉力顶层较底层减少了29.5%;纵向格栅顶层比底层先发挥作用。铺轨加载增大了纵横两向格栅的拉力,但对路基变形没有影响。加筋垫层提高了复合地基中的桩土应力比。
According to field study, it is shown that the tensile force of geogrid in the crosswise direction is largest in the road center; the upper layer reduce 29.5 percent compared with the lower layer in double-layer grid; geogrid of the upper layer in the longitudinal direction works earlier than the lower layer. Track laying can enlarge the value of the tensile force of geogrid in the longitudinal and crosswise directions; but without influence on the roadbed deformation. The reinforced cushion can increase the value of stress ratio of pile to soil inside composite foundation.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第4期799-802,共4页
Rock and Soil Mechanics
基金
铁道部科学基金项目(2004G026)
关键词
土工格栅
路基变形
桩土应力比
geogrid
roadbed deformation
stress ratio of pile to soil
