清水河大桥桥址区岩溶发育规律研究  

Study on Karst Development Regularity of Qingshuihe Bridge Site

作　　者：何旭东[1,2] 林德洪 刘秀伟[1] 田维强 彭运动[3] HE Xu-dong;LIN De-hong;LIU Xiu-wei;TIANWei-qiang;PENG Yun-dong(The 114 Geological Brigade of GuiZhou Geological ProspectingBureau, Zunyi Guizhou 563000, China;Guizhou ProvinceMountain Geological Hazards Prevention and Control EngineeringTechnology Research Center, Guiyang Guizhou 550001, China;China Road Planning and Design Institute Co., Ltd., Beijing100088, China)

机构地区：[1]贵州省地质矿产勘查开发局114地质大队,贵州遵义563000 [2]贵州省山地地质灾害防治工程技术研究中心,贵州贵阳550001 [3]中交公路规划设计院有限公司,北京100088

出　　处：《西部探矿工程》2019年第7期1-5,共5页West-China Exploration Engineering

基　　金：贵州省地矿局地质科研项目(黔地矿科合2017-20号),基于GTS NX的有限元分析方法在复杂高边坡稳定性分析及治理应用研究

摘　　要：清水河大桥为贵瓮高速公路控制性工程之一;桥址处于碳酸盐岩分布区,地表岩溶溶洞现象较发育,勘探钻孔揭示岩蚀现象强发育,查清桥址区岩溶发育规律,合理判断大桥索塔、高墩桩基持力层深度是关系到桥梁建设的可行性。通过对岩溶发育的控制因素分析并结合桥址区岩溶及规模统计,总结岩溶发育规律。提炼了岩溶发育的阶段性、继承性、方向性,高程860m以上岩溶总体发育趋势以水平溶洞为主,多为空洞;高程840m以下岩溶总体发育趋势以垂直溶隙为主,反映了岩溶发育的阶段性和继承性,未发现规模较大的溶洞和水平岩溶管道,地壳抬升期,岩溶发育处于稳定期,为桩基持力层深度确定提供依据,岩溶对大桥建设制约完全可以控制,影响相对较小。Qingshuihe Bridge is one of the control projects of Guiweng expressway;The bridge site is located in the carbonate rock distribution area, and karst caves are well developed on the surface. Exploration boreholes reveal that the karst erosion is well developed. Finding out the law of karst development in bridge site area and reasonably judging the depth of supporting layer of cable tower and pile foundation of high pier are related to the feasibility of bridge construction. Based on the analysis of controlling factors of karst development and the statistics of karst scale in bridge site area, this paper summarizes the law of karst development and puts forward the stages, inheritance and orientation of karst development. The overall development trend of karst above 860m is mainly horizontal karst caves, most of which are voids;The general development trend of karst below 840m elevation is mainly vertical karst fissures. It reflects the stage and inheritance of karst development, and no large-scale karst caves and horizontal karst pipelines have been found. During the period of crustal uplift, karst development is in a stable stage, which provides a basis for determining the depth of bearing stratum of pile foundation. The restriction of karst on bridge construction can be completely controlled, and the influence is relatively small.

关 键 词：清水河大桥 岩溶 发育规律 阶段性 继承性 方向性 

分 类 号：U416[交通运输工程—道路与铁道工程]