土工格栅加筋土陡防护堤的试验

对某土工格栅加筋土陡防护堤进行现场试验研究,分析施工期及竣工后一季度期间的加筋体底部竖向土压力、反包体背部侧向土压力和土工格栅拉筋应变分布规律.试验结果表明:土工格栅加筋土陡防护堤底部垂直土压力在横断面上呈非线性分布,路堤中心附近与坡脚附近的平均垂直土压力相差不是很大;堤中心垂直土压力比不加筋的减少了20%以上;不同高度处的格栅应变沿筋长方向呈非线性分布,格栅最大应变不超过4%;反包体后侧向土压力沿堤高呈上小下大的非线性分布;底部垂直土压力、侧向土压力、格栅应变在工后两个月,趋于稳定;安全稳定的土工格栅加筋土陡防护堤是可行的.

Experimental Study of Geogrid Reinforced Earth Steep Protecting Barrier

A geogrid reinforced earth steep protecting barrier was investigated by field test. Bottom vertical earth pressures and lateral earth pressures of the geogrid reinforced earth steep protecting barrier were researched during construction and a post-construction quarter, and reinforcement strains were also researched. The results of the field test show that the distribution of bottom vertical earth pressures is nonlinear along the width of the protesting barrier, the pressure near the center of protesting barrier is similar to the pressure near the foot. The bottom vertical earth pressure in the center of the reinforced earth protesting barrier is 20% less than that of unreinforced protesting barrier; the distribution of the reinforcement strains along the reinforcement length is nonlinear, and the maximum strain of the geogrid the steep protesting barrier is less than 4%. The distribution of lateral earth pressure on the packed soil mass is nonlinear, as the height increases, the pressure decreases. The bottom vertical earth pressures, lateral earth pressures and geogrid strains after two post-constriction months tends to be stable. Therefore, the building of a geogrid reinforced earth steep protesting barrier is feasible in security and stability.