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以莫桑比克首都南部某道路改建项目为依托,根据落锤式弯沉仪(FWD)旧路检测结果,通过实测动态回弹模量、CBR、静态回弹模量的相关性,评价旧路强度和适用层位;根据南非与我国规范的要求,结合道路功能定位,提出旧路利用方案与设计参数,并探讨了两类设计规范兼容应用的可能性。结果表明:可通过FWD检测评估旧路承载能力,提供改建设计参数选取依据;现状路基、路面强度等级应根据动态模量、加州承载比、静态模量关联性判定;路基保持一定的填土高度十分必要;对同时采用我国与南非技术规范的项目,设计指标和参数的选用须统一在同等试验条件下。
Relying on the reconstruction of a road in the southern part of the capital of Mozambique and based on the old FWD test results, the correlation between the dynamic modulus of elasticity, CBR and the static resilience modulus was evaluated to evaluate the strength of the old road and According to the requirements of South Africa and China’s norms, combined with the functional orientation of the road, proposed the use of old roads and design parameters, and discusses the possibility of compatibility of two types of design specifications. The results show that: the FWD test can be used to evaluate the bearing capacity of the old road and provide the basis for selection of the design parameters for the rebuilding; the existing subgrade and pavement strength grades should be judged according to the dynamic modulus, California bearing ratio and static modulus; It is very necessary. For the projects adopting the technical specifications of China and South Africa, the selection of design indexes and parameters shall be unified under the same experimental conditions.