摘要
针对朔黄铁路黄土地区某站场路基塌陷问题开展研究,采用高密度电法和地质雷达的综合物探方法,结合工程地质及水文地质调绘、区域气象数据分析、车站排水系统运行状况调查、路基填料调查、挖探、取样及土工试验,综合分析路基塌陷形成的原因和机理,明确需重点整治的病害段落并给出地基加固处理深度。研究表明:通过多种勘察方法综合应用、相互印证,揭示黄土及黄土质填土在地表水渗漏作用下疏松、软化是产生路基塌陷病害的主要原因,其破坏类型为土体松散型破坏。
This paper studied the subgrade collapse of a station located in loess area of Shuozhou-Huanghua Railway. The causes and mechanism of subgrade collapse were comprehensively analyzed by methods including high-density electrical method, ground penetrating radar geophysical exploration, engineering geological, hydrogeological mapping, regional meteorological data analysis, station drainage system operation status investigation, subgrade filling investigation, excavation, sampling and geotechnical tests. Finally, the disease sections that needed to be treated were confirmed, and the depth of foundation reinforcement was suggested. The research results showes that: Through the comprehensive application and mutual confirmation of various investigation methods, it is revealed that the loosening and softening of loess and loess filler under the action of surface water leakage is the main cause of subgrade collapse, and the failure type is incompact soil failure.
作者
马佳
李勤光
Ma Jia;Li Qinguang(China Railway Engineering Design and Consulting Group Co.,Ltd.,Beijing 100055,China)
出处
《铁道勘察》
2022年第3期52-56,共5页
Railway Investigation and Surveying
关键词
路基塌陷
高密度电法
地质雷达
地质调绘
排水系统
综合勘察
subgrade collapse
high-density electrical method
ground penetrating radar
engineering geological mapping
drainage system
integrated survey
