基于沉降速率比法计算淤泥质黏土沉降的修正方法  

SETTLEMENT-VELOCITY RATIO BASED CORRECTION METHOD FOR CALCULATING SETTLEMENT OF MUDDY CLAY

作　　者：张优龙[1] 杨坪[1,2] 

机构地区：[1]同济大学土木工程学院地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《工程地质学报》2015年第3期521-525,共5页Journal of Engineering Geology

基　　金：国家自然科学基金项目(41002093);上海市自然科学基金项目(14ZR1442800);地质灾害防治与地质环境保护国家重点实验室开放基金项目(SKLGP2014K013);上海市重点学科建设项目(B308);同济大学青年优秀人才培养计划资助

摘　　要：基于太沙基固结理论和淤泥质黏土的沉降规律,综合考虑瞬时沉降、主-次固结沉降各阶段的影响,提出了一种基于沉降速率比法计算淤泥质黏土沉降的修正方法。该方法仅需要对前期沉降速率进行最小二乘法分析,求得固结系数,从而可对淤泥质黏土沉降全过程进行预测。工程实例表明,该方法预测沉降量与实测值吻合很好,可为同类工程提供参考。Settlement of muddy clay includes immediate settlement and primary-secondary consolidation settlement on the basis of Terzaghi's consolidation theory. Using the settlement law of muddy clay,this paper puts forward a modified settlement-velocity ratio method to calculate muddy clay settlement. The method can predict the settlement of muddy clay by means of getting consolidation coefficient. The consolidation coefficient can be reached by analyzing the settlement velocity with least square method. The example shows that predicted settlements and measured values are anastomotic,which means that the method can provide references for similar projects.

关 键 词：淤泥质黏土沉降速率比沉降预测 固结系数 

分 类 号：TU443[建筑科学—岩土工程]