宝兰客运专线湿陷性黄土分布规律及地基处理技术分析

宝鸡至兰州客运专线为我国在陇西深厚层湿陷性黄土地区修建的第一条高速铁路客运专线。该线所属区域湿陷性黄土厚度大、等级高,如何准确查明沿线湿陷性黄土的分布规律对于基底沉降控制尤为重要。为了详细查明宝兰客运专线沿线湿陷性黄土的分布规律,勘察中在全线开展详细的工程地质勘察工作,同时,针对深厚层湿陷性黄土,采用深试坑、钻探及静力触探相结合的综合勘察手段,查明沿线湿陷性黄土的分布规律。从宏观上对沿线湿陷性黄土分布规律进行系统的分析,并结合既有郑西客运专线的成功经验,对深厚层湿陷性黄土处理技术进行详细论述。

Distribution Rules of Collapsible Loess and Analysis on Foundation Treatment Technology on Baoji-Lanzhou Passenger Dedicated Line

The passenger dedicated line from Baoji to Lanzhou is the first high speed line in Western part of Gansu Province with deep andthick layer of collapsible loess. In view of collapsible thickness and high grade collapsible loess,it is very important to find out the distribution rules of collapsible loess to control basement subsidence. To understand and analyze the distribution rules along the line,detailed geological survey is carried out with combination of deep test pits,drilling and static contact investigation. Detail treatment of collapsible loess is also discussed with reference to the experiences on Zhenxi passenger dedicated line.