公路工程中黄土湿陷性问题分析

依据对黄土基本湿陷特性的试验研究,结合公路工程的特点,分析并提出了与公路设计有关的黄土增湿湿陷量的计算方法和黄土增湿速率的确定方法;分析并总结出路堤填土小于或大于某一高度时,可不考虑原状黄土地基的湿陷变形。认为目前执行的国家标准《湿陷性黄土地区建筑规范》来源于工业与民用建筑行业经验,不能适用于公路工程建设的需要。因道路工程线长、面广,地形地质条件多变,相对建筑面积上投资小,在分析与处理湿陷性黄土的方法上应注意行业特点。

Analysis of problems on loess hydrocompaction in highway engineering

Based on the study of the basic characteristic of loess hydrocompaction and combining the peculiarity of highway engineering,authors analysed and put forward the method of computing quantity of deformation under adding damp condition and the measure of ascertaining speed of loess-adding damp,also drew a conclusion:if the high-fill was less or more than a constant height,then the deformation of adding damp on original state loess could be ignored.In the mean time,authors thought the national standard at present Construction Criterion of Loess Hydrocompaction District came from experience of civil engineering,and it could not be the same with highway construction.Because of the long-road,area-wide,complicated geological condition and lower investment in build area,the peculiarity of industry should be concerned when analyzing and dealing with the loess hydrocompaction.