丰准线黄河特大桥位于内蒙古黄土高原的黄河峡谷。岩溶问题是影响该桥桥基稳定氤￡要问题。本文介绍了通过采用多种有效方法——地质测绘、钻探尤其是无线电波透视探查桥渡区 岩溶取得的成果。并对北方地区的岩溶发育规律进行了探讨。

The extra-long bridge in a railway line from Fengzhun to Zhungeer is located in the gorge of Yellow River in Inner Mongolian Loess Plateau. Karst is the main problem af?fecting the stability of the bridgebase. The main achievement made through several effective methods such as the in-drilling radiowave transimission，the geological mapping and the drilling are introduced，The rules of karst development in North China are also probed here。