强震区土坝抗震措施研究

国内大量建于20世纪50～70年代的土坝，坝体施工质量普遍较差，且坝基为密实度较低的粉砂土。在地震作用下极易液化，为此必须开展地震动力安全性性评价，并研究相应的抗震工程措施。针对庆安水库，通过对混凝土连续墙、振冲碎石桩和抛石压重3种常用抗震加固方案的分析，推荐了土坝抗震加固的合理工程措施，可在类似工程中推广使用。

Study on aseismic measures of earth dams in meizoseismal area

The construction qualities of earth dams built in the fifties to seventies of the twentieth century are usually worse and their foundations are the silty soil which has low density and is quite easy to be liquefied under the action of earthquake. It’s necessary to estimate their aseismic safety and study on the corresponding aseismic measures. Aiming at Qing-an Reservoir, the three schemes, such as concrete continuous wall, vibro-replacement stone column and rock pressure, are analyzed by FEM; and the reasonable engineering measure which may be widely used in the analogous project is recommended.