北盘江大桥桥址区岩溶发育特征及规律分析

摘要

以北盘江大桥桥址区地质调查、地质钻探和工程物探资料为基础，分析了桥址区岩溶发育特征及规律，并探讨了岩溶发育优势面，结果表明桥址区岩溶多沿垂向裂隙面发育，水平向岩溶发育现象较少，仅层面有溶蚀现象，桥址区主要节理裂隙走向为310°~320°，其裂隙面为岩溶发育的优势面。%In this paper,referring to the results of geological survey,geological exploration and geophysical prospecting in the site of Beipanjiang bridge,the characters and principles,and also preferred plane of karst are analyzed in the site. The resulted show that karst is dominant in verti-cal direction than in horizontal direction,and only some karst develops on terrane plane in the site. And the strike of main joint fissure is 310~320 degree,and the plane of main joint fissure is the preferred plane of karst in the site of Beipanjiang bridge.