山区高速公路岩溶地质桥梁桩基处理方案分析  

Analysis on Treatment Schemes for Pile Foundation of Karst Geological Bridges of Expressways in Mountainous Area

作　　者：马雷 张浩 Ma Lei;Zhang Hao(Anhui Transport Consulting&Design Institute Co.Ltd.,Hefei 230088,China)

机构地区：[1]安徽省交通规划设计研究总院股份有限公司,合肥市230088

出　　处：《北方交通》2023年第12期13-17,共5页Northern Communications

摘　　要：岩溶地质桥梁桩基的处理需要根据桩位处地层信息、溶洞位置、尺寸、填充情况等因素来确定。宜宾至昭通高速公路二期工程灰岩区长度21.41km,岩溶区桥梁有14座,结合该工程具体案例,从勘察、设计、施工多个角度分析了山区高速公路岩溶地质桥梁桩基础处理方案,得出岩溶区桥梁桩基尺寸、长度、入岩深度和溶洞顶板持力层厚度的取值方法以及溶洞处治的关键技术和控制要点,以确保工程的整体质量,最大程度保证工程的综合效益。The treatment of the pile foundation of the karst geological bridges needs to be determined according to factors such as stratigraphic information at the pile location,karst cave location,size,and filling situation and so on.The length in the limestone area of the phase II project of the Yibin-Zhaotong expressway is 21.41km,and there are 14 bridges in the karst area.In combination with the specific case of this project,the treatment schemes for the pile foundation of the karst geological bridges of expressways in mountainous area are analyzed from multiple perspectives of exploration,design,and construction.The value taking methods for the size,length,rock penetration depth of the pile foundation of the bridges and the thickness of the supporting layer of the karst cave roof in the karst area as well as the key technologies and control points for karst treatment are obtained,so as to ensure the overall quality of the project and guarantee the comprehensive benefits of the project to the most extent.

关 键 词：山区高速公路 桥梁工程 桩基 岩溶地质 溶洞处治 

分 类 号：U445.551[建筑科学—桥梁与隧道工程]