应力吸收层防治沥青加铺层反射裂缝的力学分析

Mechanical Analysis in Performance of SAMI in Retarding Reflective Crack

SAM I应力吸收层是一种新型的防治沥青加铺层反射裂缝材料。为了验证其防反性能,将SAM I与土工布、玻纤格栅等土工材料应力吸收夹层进行对比,分别分析在旧水泥混凝土路面与沥青加铺层之间设置应力吸收夹层以及SAM I时沥青加铺层的力学响应,路面荷载采用实测轮胎接地荷载。对SAM I的合理的厚度与模量范围提出建议,分析结果表明,SAM I应力吸收层防反效果明显优于土工布、土工格栅等土工材料应力吸收夹层。

SAMI is new kind of asphalt mixture with capacity of retarding reflective crack. In order to estimate the performance of retarding crack of SAMI, this paper introduced another anti-crack material： geosynthetics. And it also analyzed the stress responses of asphalt overlaying old PCC pavement with the two kinds of interlayer under measured tire pressure. The analysis indicated that the performance of SAMI is better than geosynthetics in retarding reflective crack.