某客运专线活动断裂综合勘察与评价研究

Active Faults Integrated Survey and Evaluation Research in a Passenger Line

研究目的:活动断裂与地裂缝在某客运专线北京区域段非常发育,对高速铁路的设计施工和运营安全带来极大地质隐患。本文在前人的研究基础上,应用物探、钻(槽)探及样品测试等综合勘察技术探查铁路沿线活动断裂(地裂缝)的空间分布及地质特征,分析技术可行性及有效性;并根据铁路工程的设计特点对断裂的活动性、地裂缝灾害及区域地震安全性进行评价研究,为铁路地质选线、设计施工及工后防治提供必要的地质依据。研究结论:(1)以工程物探为主要手段的综合勘察技术在活动断裂探查与评价中是有效和可靠的,能够揭示活动断裂及地裂缝的地质特征和空间分布状态,并满足铁路客运专线勘察设计的需求;(2)提出了京北活动断裂区各条断裂的活动性、地裂缝灾害及地震安全性评价,评价结果可作为该客运专线进一步设计与工后防治的依据;(3)本研究成果对类似的铁路勘察设计具有指导性意义,而且在公路、水利水电及其他工民建领域具有推广价值。

Research purposes： Active faults and ground fissures are developed in Beijing area of a passenger dedicated line, which bring about great geologic hazard for the design construction and operation safety of high - speed railway. Based on predecessors＇research, this paper used comprehensive survey technology to probe the spatial distribution and the geological characteristics of the active faults and ground fissures along the railway, such as geophysical prospecting, borehole surveying （trenching）, and the sample test and so on, and analyzed the technical feasibility and effectiveness. According to the design characteristic of railway engineering, evaluated and researched on the fault activity, ground fissure disasters and regional seismic safety, to provide the necessary survey data and the suggestion for the railway geological line selection, design, construction and prevention after construction. Research conclusions： （ 1 ） Engineering geophysical prospecting as the main int exploration and evaluation is effective and reliable, able to reveal the geological egrated survey technology in active fault characteristics and spatial distribution of the active faults and the ground fissures, and meet the needs of railway survey and design of passenger dedicated line. （2） This paper proposed various fracture activity, ground fissure disaster and seismic safety evaluation of Beijing north activity fracture zone, the evaluation results is the basis of the further design of passenger dedicated line and the prevention and control after construction. （3） The research achievements have guiding significance for the similar railway survey and design, and have strong generalization value in the field of highway, water conservancy and hydropower, and other civil.