衢丽铁路大型岩堆的工程地质勘察与选线  

Engineering Geological Investigation and Route Selection of Large-scale Rock Heap on Quzhou-Lishui Railway

作　　者：王祥[1] WANG Xiang(China Railway Siyuan Survey and Design Group Co.Ltd,Wuhan,Hubei 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《铁道工程学报》2023年第10期45-48,55,共5页Journal of Railway Engineering Society

摘　　要：研究目的:衢丽铁路位于浙江括苍山脉西北侧,以低山、中低山为主,山势陡峻,岩堆发育,在勘察设计期间,通过测绘、物探、钻探等综合地质勘察手段,查明大型岩堆地段的工程地质条件,为后续线位的选择、工程类型设置、设计和施工提供地质资料。研究结论:(1)马村岩堆为大型岩堆,岩堆体长约300 m,宽200 m,最大厚度达32 m,体积约120万m^(3),主要成分为块石土、碎石土;(2)天然工况下整体和局部稳定安全系数均大于规范要求值1.30,暴雨工况下整体和局部稳定安全系数小于规范要求值1.15,目前岩堆属于基本稳定状态;(3)根据综合勘察结果,原线位从岩堆中部穿越,岩堆处理工程量巨大,对线位进行了局部调整,选择北侧的线位方案可有效减少岩堆对工程的影响,降低处理岩堆的工程费用;(4)本研究成果可为山区铁路岩堆地段的勘察和选线提供参考。Research purposes:Quzhou-Lishui railway is located on the northwest side of the Kuocang mountain range in Zhejiang province.It is characterized by low and medium-low mountains with steep terrain and numerous rock heaps.During the survey and design period,comprehensive geological investigation methods such as surveying,geophysical exploration,and drilling were used,and the engineering geological conditions of the large-scale rock heap section are found out,which provide geological data for the selection of the following line position,project type setting,design and construction.Research conclusions:(1)Macun rock heap is a large rock heap,the rock heap is about 300 m long and 200 m wide,the maximum thickness is 32 m,the volume is about 1.2 million m^(3),and the main components are lump rock soil and crushed rock soil.(2)The overall and local stability factor of safety under natural conditions are larger than the required value of 1.30,and the overall and local stability factor of safety under rainstorm conditions are smaller than the required value of 1.15,the rock pile is basically stable at present.(3)According to the comprehensive investigation results,the original line passes through the middle of the rock heap,the rock heap treatment works are huge,the line position is adjusted locally,and the selection of the line position scheme on the north side can effectively reduce the influence of the rock heap on the project and reduce the engineering cost of rock heap treatment.(4)The research results can provide references for the reconnaissance and route selection of railway rock heap section in mountain area.

关 键 词：铁道工程 岩堆 勘察 选线 

分 类 号：TU42[建筑科学—岩土工程]