地震工程学报
地震工程學報
지진공정학보
China Earthquake Engineering Journal
2014年
3期
555-561
,共7页
地震液化%初判%复判%液化指数%震陷值%谱强度比%危害性评价
地震液化%初判%複判%液化指數%震陷值%譜彊度比%危害性評價
지진액화%초판%복판%액화지수%진함치%보강도비%위해성평개
seismic liquefaction%preliminary judgment%further discrimination%liquefaction in-dex%seismic settlement value%spectrum intensity ratio%hazard evaluation
饱和砂土地震液化有可能诱发极为严重的破坏，已成为土动力学领域的重要研究课题之一。对液化的判别分为初判和复判。初判指根据已有的勘测资料或简单的测试手段，初步判别土层的液化可能。对于初判可能发生地震液化的土层，则再进行复判。鉴于土层液化的影响因素较多，我国规范建议采取经验方法，即标准贯入法，静力触探法，剪切波速法。单一判别方法都有局限性和适用范围，宜用各种方法综合判别。液化危害性评价使用危害性指标，分析液化对建筑物的危害程度。评价方法主要有液化指数法，震陷值法，谱强度比法和综合法。以评价指标为依据，划分液化影响的综合等级，全面反映液化危害程度。
飽和砂土地震液化有可能誘髮極為嚴重的破壞，已成為土動力學領域的重要研究課題之一。對液化的判彆分為初判和複判。初判指根據已有的勘測資料或簡單的測試手段，初步判彆土層的液化可能。對于初判可能髮生地震液化的土層，則再進行複判。鑒于土層液化的影響因素較多，我國規範建議採取經驗方法，即標準貫入法，靜力觸探法，剪切波速法。單一判彆方法都有跼限性和適用範圍，宜用各種方法綜閤判彆。液化危害性評價使用危害性指標，分析液化對建築物的危害程度。評價方法主要有液化指數法，震陷值法，譜彊度比法和綜閤法。以評價指標為依據，劃分液化影響的綜閤等級，全麵反映液化危害程度。
포화사토지진액화유가능유발겁위엄중적파배，이성위토동역학영역적중요연구과제지일。대액화적판별분위초판화복판。초판지근거이유적감측자료혹간단적측시수단，초보판별토층적액화가능。대우초판가능발생지진액화적토층，칙재진행복판。감우토층액화적영향인소교다，아국규범건의채취경험방법，즉표준관입법，정력촉탐법，전절파속법。단일판별방법도유국한성화괄용범위，의용각충방법종합판별。액화위해성평개사용위해성지표，분석액화대건축물적위해정도。평개방법주요유액화지수법，진함치법，보강도비법화종합법。이평개지표위의거，화분액화영향적종합등급，전면반영액화위해정도。
Earthquake liquefaction of saturated sandy soils may induce severe damage,and this is-sue has become an important research topic in the field of soil dynamics.To judge the potential for earthquake liquefaction and to evaluate liquefaction hazards can lead to better control and predic-tion of liquefaction.Liquefaction discrimination may be considered first by making a preliminary judgment.Preliminary judgment,according to available survey data or a simple testing method, may provide a determination of the initial level of soil liquefaction.Further discrimination is neces-sary for soil layers where earthquake liquefaction may occur,as determined by the preliminary judgment.Since there are many factors affecting soil liquefaction,we recommend an empirical method that includes the standard penetration test,the static cone penetration (static sounding) test,and the shear wave velocity method.The single discrimination method has limitations in its scope of application;therefore,a combination of various methods is more reliable.Liquefaction hazard evaluation adopts a harmfulness index to analyze the degree of harm caused to buildings by liquefaction.Evaluation methods mainly include the liquefaction index method,the seismic settle-ment value method,the spectrum intensity ratio method,and the synthetic method.Based on the evaluation index,a comprehensive liquefaction ranking can fully reflect the potential and extent of the liquefaction hazard.
