阿尔金山北缘断裂的构造特征及铁路选线建议.pdfVIP

第59卷 第4期 铁 道 标 准 设 计 Vol.59 No.4 2015年4月 RAILWAY STANDARD DESIGN Apr. 2015 文章编号:1004 2954(2015)04 0009 04 阿尔金山北缘断裂的构造特征及铁路选线建议 张玉玺 (中铁第一勘察设计院集团有限公司,西安 710043) 摘 要:以格库铁路勘察为项目依托,对阿尔金山北缘断裂的构造属性、成因和基本特征进行研究。 采用AMT 物 探、测氡相结合的物探方法,结合详细的地质调查,查明该断裂带位于两大微地块的边界,阿尔金山北缘山脚下,为 一区域性构造断裂带,主断层宽30~200m,倾角40° ~80°,倾向南,为一逆冲断层,影响带宽度为1000 ~3000m, 规模巨大,带内主要不良地质为泥石流和危岩落石。 准确查明该断裂带的以上特征,为铁路工程选线提供重要参 考,结合区段的工程地质特征,提出合理的工程措施建议。 关键词:格库铁路; 断裂构造; AMT物探; 测氡法 中图分类号:U212.32 文献标识码:A DOl:10.13238/ j.issn.1004-2954.2015.04.003 Tectonic Characteristics of North Altyn Border Fault and Suggestions for Railway Route Selection ZHANG Yu-xi (China Railway First Survey and Design Institute Group Ltd. ,Xi’an710043,China) Abstract:Basedonthesurveyof Golmud-Korlarailway,thispaperstudiesthetectonicattribute,genesis and features of the north Altyn border fault. With AMT geophysical prospecting method and in combination with radon method and detailed geological investigation,it is ascertained that the fault is locatedinthetwomicroblockboundaries,atthefootof northernmarginoftheAltyn Mountains,andisa regional tectonicfault zone. The mainfault is30~200mwide at40°~80° angle,dipping to the south, and a thrustfaultwith 1000~3000maffectedwidth,characterizedby mud-rockflow androckfallinthe huge fault zone. Identification of the above features helps providing important references for route selection and recommendationsfor proper engineering measuresinthelight of the geological conditionsof the project. Key words:Golmud-Korla Railway;Fault structure;AMT geophysical prospecting;Radon method 在格库铁路勘察的项目背景下,研究阿尔金山北