建筑场地地震液化危害评价及地基处理

HAZARD ASSESSMENT OF SEISMIC LIQUEFACTION FOR CONSTRUCTION SITES AND GROUND TREATMENT

本文分析了地基失稳，计算震陷值及差异震陷等地基失效形式和液化土层的隔震作用，研究了液化指数、地基失效、液化土层隔震与多层房屋震害的关系，根据液化土的双重作用原理划分了液化危害等级，并提出了建筑场地地震液化危害评价方法和按“小震不坏，中震可修，大震不倒”的抗液化处理原则。

Ground instability, calculated seismic settlement values and isolation function of a liquefied soil layer are analyzed herein. The relationship between liquefaction index, ground failure, isolation function of a liquefied soil layer, and earthguake damage of multistoried buildings are also studied in this papar. The classes of liquefaction hazards are determined according to the double function principle of liquefied soil, and methods for assessment of seismic liquefaction hazards at construction sites are suggested.