玉蒙铁路曲江峡谷桥位选址及线路方案比选研究
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摘要
研究目的:结合玉蒙铁路的勘察设计,在地质条件极为复杂的山区峡谷河段,进行重点桥位及线路走向的多方案工程地质条件研究比选,确定合理的桥址及线路方案。研究方法:遵循“线路服从桥位,桥位服从地质选址”的原则。采用地质综合勘探方法,详细查明峡谷区重大工程地质问题,综合比选确定桥址及线路方案。研究结果:作者通过系统的地质研究和对该项目地质选线经验的总结,提出了“复杂地质环境条件下必须坚持重大工程优先选址,并重视宏观区域地质选线”的原则及勘察设计中应注意的问题,最终选定了工程地质条件相对较好的桥址及线路方案。研究结论:玉蒙铁路经过的曲江峡谷地段,地处高烈度地震区、活动断裂带附近,内外动力地质灾害突出,使重大控制工程曲江大桥桥位的选择十分困难。工程技术人员通过系统研究峡谷区的区域地质环境及主要的工程地质问题,比选了8个桥址及4个线路方案,最终选定了5号桥址的C2K线路方案,为工程设计与施工创造了有利条件。
Research purposes: In combination with the survey and design of Yumeng railway,a comparison and research have been performed of engineering geological condition of various proposals for major bridge site and route selection in the gorge section with the complicated geological condition in the mountain area to determine the reasonable proposal of bridge site and route.Research methods: Following the principle of"the route submitting to bridge site and the bridge site submitting to the geology for choice",the paper adopts the integrated prospecting methods for geology and discloses in detail the major engineering geological problems in the gorge area.Research results: Through systematically researching geology and suming up the experience of route selection in geology of this project,the author proposed the principle of "The site selection for the major project must be adhered to and the route selection in macro areal geology must be attached importance to under the condition of complicated geological environment" and the issues must be paid attention to in survey and design.Finally,the proposal of bridge site and route with better engineering geological condition was determined.Research conclusions: As the Qujiang gorge section for the Yumeng railway passing lies in the highly-intensive seismic area,active fault zone nearby and the internal and external dynamic geological disaster is quite remarkable.So it is difficult to choose the site of Qujiang Major bridge——major control work.Nevertheless,the engineering technicians have committed themselves to perform a comparison and research of the local geologic environment and principal engineering geologic problems of 8 bridge sites and 4 route proposals.Finally they determine the C2K route proposal of 5# the bridge site and create the favorable condition for design and construction of project.
Research purposes: In combination with the survey and design of Yumeng railway,a comparison and research have been performed of engineering geological condition of various proposals for major bridge site and route selection in the gorge section with the complicated geological condition in the mountain area to determine the reasonable proposal of bridge site and route.Research methods: Following the principle of"the route submitting to bridge site and the bridge site submitting to the geology for choice",the paper adopts the integrated prospecting methods for geology and discloses in detail the major engineering geological problems in the gorge area.Research results: Through systematically researching geology and suming up the experience of route selection in geology of this project,the author proposed the principle of "The site selection for the major project must be adhered to and the route selection in macro areal geology must be attached importance to under the condition of complicated geological environment" and the issues must be paid attention to in survey and design.Finally,the proposal of bridge site and route with better engineering geological condition was determined.Research conclusions: As the Qujiang gorge section for the Yumeng railway passing lies in the highly-intensive seismic area,active fault zone nearby and the internal and external dynamic geological disaster is quite remarkable.So it is difficult to choose the site of Qujiang Major bridge——major control work.Nevertheless,the engineering technicians have committed themselves to perform a comparison and research of the local geologic environment and principal engineering geologic problems of 8 bridge sites and 4 route proposals.Finally they determine the C2K route proposal of 5# the bridge site and create the favorable condition for design and construction of project.
引文
[1]云南省地震局地震地质队.曲江断裂地震地质填图说明及其现代构造运动综合研究报告[R].昆明:云南省地震局,1987.
[2]刘祖荫,等.1970年通海地震[M].北京:地震出版社,1999.
[3]GB 18306-2001,中国地震动参数区划图[S].
[2]刘祖荫,等.1970年通海地震[M].北京:地震出版社,1999.
[3]GB 18306-2001,中国地震动参数区划图[S].
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