武汉理工大学土木工程与建筑学院：5天课程课程题目：ElasticVisco-PlasticModelsforClayeySoilsandApplicationsinConsolidationAnalysis粘性土的弹粘塑性模型及其固结分析应用Lecture4:from9:55amto12:55pmon1June2021AGeneral Simple Method forCalculatingConsolidation Settlements ofLayered Clayey Soilswith Vertical Drains under Staged Loadings一种可考虑排水板、多层土和多级荷载的软黏土固结沉降的通用簡罩計算方法Jian-HuaYIN（殷建华）ChairProfessorofSoilMechanicsDepartment of Civil and Environmental Engineering (CEE)TheHong Kong Polytechnic University (PolyU),Hong Kong, ChinaDEPARTMENTOFTHEHONGKONGCIVILANDENVIRONMENTALENGINEERINGPOLYTECHNICUNIVERSITY土木及環境工程學系香港理工大學
1 Jian-Hua YIN (殷建华) Chair Professor of Soil Mechanics Department of Civil and Environmental Engineering (CEE) The Hong Kong Polytechnic University (PolyU), Hong Kong, China A General Simple Method for Calculating Consolidation Settlements of Layered Clayey Soils with Vertical Drains under Staged Loadings 一种可考虑排水板、多层土和多级荷载的软黏土固結 沉降的通用簡單計算方法 武汉理工大学土木工程与建筑学院: 5 天课程 课程题目：Elastic Visco-Plastic Models for Clayey Soils and Applications in Consolidation Analysis 粘性土的弹粘塑性模型及其固结分析应用 Lecture 4: from 9:55 am to 12:55 pm on 1 June 2021
Contents1.Introduction2.Formulation ofa General SimpleMethod for CalculatingConsolidation Settlements ofMulti-layered Soils ExhibitingCreep under Staged Loading3. Verifications with Fully Coupled Finite Element Method andMeasured dataCaseI:Consolidation Settlements of a ClayLayerwith OCR-lor1.5Case Il:Consolidation Settlements of Layered Soils with Vertical Drains underStagedLoading-Unloading-ReloadingCase Ill:Consolidation Settlements of TestEmbankment onLayered Soils withVertical Drains under Staged Loading4.Conclusions and Remarks
2 Contents 1. Introduction 2. Formulation of a General Simple Method for Calculating Consolidation Settlements of Multi-layered Soils Exhibiting Creep under Staged Loading 3. Verifications with Fully Coupled Finite Element Method and Measured data 4. Conclusions and Remarks Case I: Consolidation Settlements of a Clay Layer with OCR=1 or 1.5 Case II: Consolidation Settlements of Layered Soils with Vertical Drains under Staged Loading-Unloading-Reloading Case III: Consolidation Settlements of Test Embankment on Layered Soils with Vertical Drains under Staged Loading
l.IntroductionManyreal projects:Multi-layersof soils,Vertical drains areused for someor all soil layers,andVertical surcharge is applied in multi-staged ramp loading,includingun-loadingandreal loading
3 1. Introduction Many real projects: • Multi-layers of soils, • Vertical drains are used for some or all soil layers, and • Vertical surcharge is applied in multi-staged ramp loading, including un-loading and real loading
SecondRunwaySettlement (updated)98.1299.1200.1201.1202.1209.1204.1205.1206.1208.1209.1210.12*11.1212.12'07.126: The second runway opened on 2 August 2007, but2withthe originally planned terminal portionpostponed. A new terminal building opened in late 2012610Post-construction settlement1214The second airport island (KIX 2)ThefrstaiportistandKiX116aDto18maverogHolocene Clay LayerMa12Sand laveMa1tTreated sandcompactionpilesMa11LMa10cand180mUpper PleistoceneMasavenaverageDoc5NogroundimprovementMas0omaweragMa7LDwBcPleeneClay layerMa4-3Sand layer
Second Runway Settlement (updated) Treated sand compaction piles No ground improvement • The second runway opened on 2 August 2007, but with the originally planned terminal portion postponed • A new terminal building opened in late 2012 Post-construction settlement 9
2.Formulation of a General Simple Method forCalculating Consolidation Settlements ofMulti-layeredSoils ExhibitingCreepunder StagedLoading2.1 Formulation of a general simplified Hypothesis B method2.2CalculationofS2.3 Calculations of U,and U2.4 Calculations of Sereep , Sepf , Secre.dj and Sereepj10
10 2. Formulation of a General Simple Method for Calculating Consolidation Settlements of Multilayered Soils Exhibiting Creep under Staged Loading 2.1 Formulation of a general simplified Hypothesis B method 2.2 Calculation of Sf 2.3 Calculations of Uj and U 2.4 Calculations of Screep , Screep,fj , Screep,dj and Screepj