水泥稳定砂砾容许拉应力的修正  

Modification of Allowable Bending Tensile Stress of Cement-stabilized Sand Gravel

作　　者：历永举[1] 宫亚峰[1] 张淑娟[2] 

机构地区：[1]吉林大学交通学院,吉林长春130025 [2]吉林省交通科学研究所,吉林长春130012

出　　处：《公路工程》2008年第4期129-132,共4页Highway Engineering

摘　　要：基于半刚性基层的干缩和温缩现象,考虑基层在含有收缩裂纹的受力状态时的极限弯拉应力,通过对不同水泥剂量的水泥稳定砂砾的劈裂试验和含裂纹的小梁弯拉试验,把由断裂韧度求出的极限拉应力同相应水泥含量的极限劈裂强度相比较,得出容许拉应力的具体修正方法和水泥稳定砂砾的修正参考值。Based on the phenomena of dry shrinkage and temperature shrinkage of the semi-rigid base, taking into account of the ultimate bending tensile stress of the base in stress state with shrinkage crack, using the split test of cement-stabilized sand gravel in different cement doses and the flexural tensile test of trabecula with crack, comparing the ultimate bending tensile stress solved by the fracture toughness with the ultimate split strength with corresponding cement content, then getting the concrete revision method of allowable bending tensile stress and the modified reference values of cement-stabilized sand gravel.

关 键 词：道路工程 水泥稳定砂砾 容许拉应力 断裂韧度 

分 类 号：U416.2[交通运输工程—道路与铁道工程]