前言在冰冻地区的中湿及潮湿路段的路面结构中,增设防冻层是防止路面冻胀破坏不可缺少的技术措施。因此,对冰冻地区路面防冻层的设计是路面强度计算之后,必须进行的一项补充设计内容。一般来说,防冻层是指路面基层下的人工基础。将满足强度要求的厚度与防冻层厚度的总和称为路面的抗冻厚度。对防冻层的设计不能看成是一个单纯的计算问题。应该是一个综合分析和评比相结合的设计过程。但应着重指出,即使设置了防冻层丝毫也不能忽视路基排水以及对土基进行改善与加固的问题。关于路面防冻层的设计,就目前来说,国外现有的一些设计方法,还不够十分完 Preface The addition of antifreeze layer in the pavement structure of wet and wet sections in the frozen area is an indispensable technical measure to prevent the frost heaving on the pavement. Therefore, the design of pavement antifreezing layer in the frozen area is a supplementary design that must be carried out after pavement strength calculation. In general, the antifreeze layer is the artificial base under the grassroots. The sum of the thickness that meets the strength requirement and the thickness of the antifreeze layer is called the antifreeze thickness of the pavement. The design of antifreeze layer can not be regarded as a simple calculation problem. Should be a comprehensive analysis and evaluation of a combination of design process. However, it should be emphatically pointed out that the problem of roadbed drainage and improvement and reinforcement of the soil foundation can not be ignored even if the antifreeze layer is installed at the very least. On the design of the road surface antifreeze layer, for now, some of the existing design methods abroad, is not enough