基于长寿命路面的固化土路基设计研究

Study on Design of Solidified Soil Subgrade Based on Long-life Pavement

摘要:

路基设计对路面结构的使用寿命有显著影响，因此需要充分考虑外部荷载、沥青组分等因素。分别从不同级配碎石层参数、沥青层参数以及荷载条件出发，探究了各项因素对于路基性能的影响，并在此基础上提出了相应的固化土路基设计要点，结果表明：加固位置与路表越近，加固效果越好；加固深度与结构模量呈正相关，层底拉应变等效和结构最大应变等效均呈现增大趋势；加固路基能够显著影响结构最大应变。

Abstract:

Subgrade design has a significant impact on the service life of pavement structure. Therefore, it is necessary to fully consider the external load, asphalt composition and other factors. Based on the parameter of different graded crushed stone layer, the parameter of asphalt layer and the load conditions, the influence of various factors on the subgrade performance is explored. And on this basis, the corresponding design points of solidified soil subgrade are proposed. The results show that the closer the reinforcement location is to the road surface, the better the reinforcement effect is. The reinforcement depth is positively related to the structural modulus. And the tensile strain equivalent of the bottom layer and the maximum strain equivalent of the structure both show an increasing trend. The reinforced subgrade can significantly affect the maximum strain of the structure.