滇东南地区岩溶路基塌陷特性及整治对策研究  

Study on Collapse Characteristics and Countermeasures of Karst Subgrade of Southeast Area of Yunnan

作　　者：薛元[1] 邱恩喜[1] 曾锐[1] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《高速铁路技术》2015年第5期48-52,共5页High Speed Railway Technology

摘　　要：根据现场调查,滇东南高原地区既有铁路岩溶塌陷较为频繁、特点比较突出。文章论述了滇东南地区独特的地形地貌、气象条件、地质条件;通过对滇东南地区既有南昆铁路的调查分析、对新建云桂铁路基于水动力条件下塌陷机理分析,从宏观上将水动力单元划分为补给区、径流区、排泄区。针对不同的水动力单元对该区域岩溶塌陷模式和机理进行了分析,提出了针对性的整治对策。通过研究分析和云桂铁路现场岩溶整治实施的实际情况,建议高速铁路路基地段岩溶的勘察、设计、施工中,重视水动力条件的研究和资料收集。为确保铁路运营安全,应采用"探灌结合、动态设计、分序实施",勘察设计施工紧密结合的一体化整治措施。为使工程措施更加有针对性,不能单一地采取注浆加固,而应综合岩溶发育的具体特征采取防排水、换填、跨越、充填等多种类型加固方案。According to the field survey, karst collapse, with prominent features, happened frequently on the existing railway in the southeast Plateau of Yunnan. The unique topography, weather conditions, geological conditions of south- east area of Yunnan are presented in this paper; through investigation and analysis of the existing Nanning Kunming railway, and the analysis of the collapse mechanism based on hydrodynamic conditions of the new Nanning-Kunming high speed railway , the hydrodynamic units are divided into recharge area, runoff area, drainage area from a macro- scopic view. Karst collapse mode and mechanism in the area are analyzed based on the different water power unit, and the specific measures of the regulation are put forward. It is suggested that the importance of the research and data col- lection of hydrodynamic conditions should be attached to in the survey, design, construction of karst subgrade of high- speed railway through research and analysis as well as the actual situation of the karst remediation on the site of Nanning- Kunming high speed railway. In order to ensure the safe operation of railway, ＂ construction with drilling exploration, dynamic design, sequencing implementation＂, and integrated regulation measures with survey, design and construction combined closely are adopted. For making the engineering measures more targeted, the sole grouting reinforcement can- not be used, but reinforcement proposals with multi types, like waterproof and drainage, replacement, crossing and fill- ing, considering the specific characteristics of karst development.

关 键 词：岩溶塌陷 水动力条件 动态设计 

分 类 号：U213.15[交通运输工程—道路与铁道工程]