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采动沉降区沥青路面力学性能的研究
摘要
穿越煤采动区的沥青路面,由于地下采动的影响,地面将不均匀沉降,路面结构产生附加应力,其值有可能超过道路允许应力使路面结构破坏,但传统沥青路面设计一般不考虑地基不均匀变形的影响,其抗变形能力有限.提出一种抗变形路面结构--设变形缝沥青路面结构.采用弹性力学理论推导地表不均匀变形引起沥青路面结构附加应力的解析表达式;并进行采动区力学性能的研究;建立路面结构与地基相互作用的有限元模型,分析路面结构在地基不均匀沉降下的受力性能,给出一些设计采动沉降区沥青路面结构的建议和对策。
关键词:采动区,沉降,沥青路面,变形,附加应力
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