大秦铁路西段工程地质选线

GEOLOGICAL ALIGNMENT IN THE WEST SEGMENT OF DATONG-QINHUANGDAO RAILWAY LINE

大秦铁路西段大洋河河谷有煤矿采空区，风沙等不良地质，且有京包铁路通过；桑干河峡谷山高谷深，地处燕山沉降带中，地质构造非常复杂，个良地质发育，并有煤矿采空区。在这里能分选出较好的铁路位置，是大秦铁路西段能否顺直的关键。本文介绍了在可行性研究时大洋河和桑干河两大方案的选择、初测阶段桑干河峡谷多方案比选以及定测阶段局部方案确定过程中的综合工程地质勘察工作，从而保证了大秦铁路西段施工的顺利和运营的安全。

here are several bad geological phenomena, such as:the mined-out areas, thestorm of sand along the valley of Dayanghe River in west segment of Da tong - Qi nhuangdao,and the Beijing-Baotou Railway Line passes there situated on Yanshan Mountain subsidencebelt.The Sangganhe River gorge with high mountains and deep valleys is very complicatedin geological structure. Varied harmful geological phenomena are widespread whether a better alignment could be chosen was the key that decided the west segment could be straight.