CAJ | 학술논문

对某深厚黄土地基上土石坝的坝基黄土和筑坝黄土进行动三轴和共振柱等动力试验,求得其动强度、动应力-应变关系,以及用于计算动孔压的动孔压特性曲线及其他动参数.在静力分析的基础上对大坝连同地基进行了三维有效应力动力分析.计算表明,Ⅶ度地震下黄土坝基会出现液化,危及大坝安全.为此,建议了距上下游坝脚一定范围内对坝基进行填土压重的经济便利的大坝抗震措施,并对填土压重的抗液化效果进行了优化分析,最终得到经济合理的填土压重范围和压重厚度.
대모심후황토지기상토석패적패기황토화축패황토진행동삼축화공진주등동력시험,구득기동강도、동응력-응변관계,이급용우계산동공압적동공압특성곡선급기타동삼수.재정력분석적기출상대대패련동지기진행료삼유유효응력동력분석.계산표명,Ⅶ도지진하황토패기회출현액화,위급대패안전.위차,건의료거상하유패각일정범위내대패기진행전토압중적경제편리적대패항진조시,병대전토압중적항액화효과진행료우화분석,최종득도경제합리적전토압중범위화압중후도.
The dynamic triaxial test, resonance column test and other dynamic tests are carried out for the loesses which exist on subgrade and core wall of an earth-rock dam on deep loess foundation. The dynamic shear strength, dynamic stress-strain relation, dynamic pore water pressure curves and other dynamic parameters are obtained. Based on the dynamic test results and static analysis, the dynamic response analysis of the dam with foundation is calculated by 3D nonlinear effective stress FEM. The calculation results show that the loess foundation will be liquefied under the earthquake intensity Ⅶ. Therefore, an economical measure for overcoming the liquefying disaster is proposed. The effect of the resisting measure for earthquake destroying is discussed; and the optimum result is obtained at last.