渭南地区区域稳定性评价  

Evaluation of Regional Stability of Weinan Area

作　　者：赵文[1] 

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《铁道工程学报》2012年第12期26-31,共6页Journal of Railway Engineering Society

摘　　要：研究目的:通过对渭南地区的地形地貌、地层岩性、基本构造特征、主要活动断裂、地震活动及区内不良地质、特殊岩土分布的分析,提出了稳定性分区,为今后渭南地区铁路、公路工程的地质选线提供参考依据。研究结论:(1)本文根据场地地质情况将渭南地区区域稳定性划为稳定区、基本稳定区、较不稳定区、不稳定区四级。(2)不稳定区为渭河南岸断裂(F3)、渭南塬前断裂(F4)、秦岭山前断裂(F5)、交斜-渭南断裂(F8)所围界的三角区域。渭南地区新建铁路、公路工程应绕避该不稳定区,通过较不稳定区时,应避开活动性较强的塬前断裂,通过其他隐伏活动断裂应大角度通过;(3)通过基本稳定区需考虑抗震设防,要充分考虑边坡稳定性、黄土湿陷性、砂土液化等问题。(4)渭南地区区域稳定性的划分填补了渭南地区区域稳定性评价的空白,为今后渭南地区的铁路、公路等工程的方案比选具有一定的指导意义。Research purposes： Based on the analysis of the topographical conditions, the lithological characteristics, the main active fault zone, the main seismic activity zone, the unfavorable geological condition and the distribution of special rock - soil, the subregions of the regional stability are presented in this paper to provide the reference and basis for the alignments of the railway and highway in the Weinan area. Research conclusions ： （ 1 ） By using the fuzzy comprehensive evaluation method, the regional stability of the Weinan area is divided into four grades： the stable region, the basically stable region, the less stable region and the unstable region. （2） The unstable area includes the delta zone surrounded by the fault zone on the south bank of Weihe River （F3）, the fault zone before the Weinan loess tableland （F4）, the fault zone before Qinlin Mountain （F5） and the Jiaoxie -Weinan fault zone （F8）. The newly -built railway and highway should keep away from the unstable region. If the newly - built railway and highway have to pass the less stable area or the hidden active fault zone, they should avoid the active fault zone before the loess tableland or pass the hidden active fault zone with the big angle. （3） When the railway and highway pass the basically stable area, the measures for the seismic resistance should be taken on consideration of the slope stability, the loess collapsibility and the sandy soil liquefaction. （4） the subregions of the regional stability of the Weinan area fill the vacancy for the regional stability evaluation, and have the guidance to the scheme selection of the railway and highway built in this area.

关 键 词：地质选线 渭南地区 区域稳定性 

分 类 号：P642.4[天文地球—工程地质学]