北盘江大桥岩体工程地质评价

针对峡谷地区公路大桥勘察的主要工程地质问题，如桥塔边坡稳定性问题，桥基、持力层的选择问题等，以贵州省关岭－兴义公路北盘江特大桥为例，根据岩体力学非线性变形理论，结合岩体结构面模拟及Hock-Brown强度曲线，确定了桥位区边坡的潜在滑动面。对该桥梁勘察中的高边坡稳定性、岩溶地质、桥位持力层的选择以及桥基承载力等问题作了进一步探讨，为实际工程的设计奠定了基础。

STUDY ON ENGINEERING GEOLOGY FOR ROCK MASS OF BEI-PANJIANG BRIDGE

There are many geo technical problems in the survey of highway bridges in valley areas,such as slope stability,bridge foundation and holding stratum decision.Taking the analysis of Beipanjiang special bridge of Guanling Xingyi Highway,Guizhou Province as an example,the article has determined a potential slide on the slope of the bridge location according to the rockmass mechanical non linear theoriesthe,the rockmass discontinuity model as well as the Hock Brown curve.It further studies the slope stability,karst geology,holding stratum and bedrock capability in the geo technique survey for bridge project designs.