叙毕铁路斑竹林隧道地质构造特征分析

叙毕铁路斑竹林隧道穿越云贵高原北部扬子准地台滇东台褶带，受多次构造运动的叠加影响，地质构造复杂。通过工程地质调绘，结合既有区域地质资料，综合分析隧区三大构造体系成生及复合关系，并重点研究各构造体系所属的褶皱、断裂发育特征，基本查明了隧区的地质构造，为隧道勘察工作提供了基础地质资料。

Analysis of Geological Tectonic Features of Banzhulin Tunnel on Xuyong-Bijie Railway

The Banzhulin Tunnel on Xuyong-Bijie Railway is across the east Yunnan platform fold belt of Yangtze paraplatform in the north of Yunnan-Guizhou plateau, which is subject to complex geological structure as a result of superposition of multiple tectonic movement. Herein with engineering geological surveying and mapping, the generating and compounding relations of three tectonic systems in the tunnel zone were analyzed on the basis of the existing regional geologic data, with the emphasis laid on the development features of the folds and faults included in the systems, respectively. Thus the geological structure in the tunnel zone was found out substantially, providing the basic geological information for tunnel investigation.