甘肃湿陷性黄土公路工程地质分区研究

以甘肃黄土地区17条高速公路工程的调查、勘探与测试资料为基础，从湿陷性黄土的分区地貌特征、物理组成、湿陷特性、力学性能等方面，分析工程沿线湿陷性黄土的区域变化规律，并针对公路线性工程及其构筑物的特点，提出了甘肃省湿陷性黄土工程地质分区原则、方法及指标体系。依据三级分区指标体系，将甘肃省湿陷性黄土划分为四个一级分区，九个二级分区和十个三级分区，得到甘肃省湿陷性黄土工程地质分区图，并分析不同工程地质分区内黄土的地貌特征、土层厚度、湿陷性能及其对公路工程建设的影响，为甘肃省黄土地区公路建设提供了基础研究资料。

Engineering Geological Zoning of Collapsible LoessHighway in Gansu Province

Based on the survey,exploration and test data of 17 highway projects in loess region of Gansu province,the regional variation rules of collapsible loess along the project have been analyzed from the aspects of subregional geomorphologic characteristics,physical composition,collapsible characteristics and mechanical properties of collapsible loess.After that,the principles,methods and index system of engineering geological zoning of collapsible loess in Gansu province are proposed according to the characteristics of highway linear engineering and its structures.In the three-level index system of engineering geological zoning map of collapsible loess in Gansu province,there are four level-1 zones,nine level-2 zones and ten level-3 zones.According the map,the topographic characteristics,soil layer thickness,collapsible performance of loess in different engineering geological zoning and its influence on highway engineering construction are evaluated.This study could provide basic research data for highway construction in loess region of Gansu province.