香港理工大学殷建华老师之PPT.ppt

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1、深基坑开挖与支护设计殷建华TheDepartmentofCivil&StructuralEngineeringTheHongKongPolytechnicUniversity,HongKong,China1OutlineofLecturesbyJHYIN:Lecture1:SubsoilExploration(Chapter2-Das)Lecture2:ShallowFoundations(Chapter3-Das)Lecture3:MatFoundations(Chapter4-Das)Lecture4:LateralEarthPressureandReta

2、iningWalls(Chapter5-Das)Lecture5:SheetPileWalls(Chapter6-Das)Lecture6:BracedCuts(Chapter7-Das)Lecture7:PileFoundations(Chapter8-Das)Lecture8:SoilImprovementandGroundModification(Chapter11-Dasplusothers)EssentialReferences:Das,BrajaM.(2007).PrinciplesofFoundationEngineering(6theditio

3、n),Thomson,UnitedStates(ISBN0-534-40752-8)26.1Introduction6.2ConstructionMethods(施工方法)6.3CantileverSheetPileWalls（悬臂板桩墙）6.4CantileverSheetPilingPenetratingSandySoils6.5CantileverSheetPilingPenetratingClay6.6AnchoredSheetWalls6.7FreeEarthSupportMethodforPenetrationofSandySoil6.8Momen

4、tReductionforAnchoredSheetPileWalls6.9FreeEarthSupportMethodforPenetrationofClayLecture6:SheetPileWalls(Chapter6-Das)板樁墻36.10Anchors6.11UltimateResistanceofAnchorPlatesandBeamsinSand（锚板和锚梁的极限承载力）6.12UltimateResistanceofAnchorPlatesandBeamsinClay(fu=0condition)6.13FactorSafetyforAnch

5、orPlatesandBeamsLecture6:SheetPileWalls(Chapter6-Das)板樁墻46.1IntroductionPurposes:supportingexcavation,retainingsoil,stoppingwaterinflow,…支撑开挖，挡土，阻止水渗流5Diaphragmwallsareundergroundstructuralelementscommonlyusedforretentionsystems,permanentfoundationwalls,deepgroundwaterbarriers.地下连续墙

6、普遍用于支撑体系，永久性的基础外墙，挡水的地下结构体。Diaphragmwallsareconstructedusingtheslurrytrenchtechnique,whichwasdevelopedinEuropeandhasbeenusedinHongKongsincethe1970‘s.地下连续墙施工过程中采用了泥浆护壁。Thetechniqueinvolvesexcavatinganarrowtrenchthatiskeptfullofanengineeredfluidorslurry.泥浆护壁技术是开挖窄槽..Theslurryexertshyd

7、raulicpressureagainstthetrenchwallsandactsasshoringtopreventcollapse.泥浆给窄槽壁施加水压，防止坍塌Slurrytrenchexcavationscanbeconstructedinalltypesofsoil,evenbelowthegroundwatertable.泥浆护壁沟渠开挖适用于各种土层Diaphragmwalls（地下连续墙）:6BentoniteSlurry（工程中配置泥浆的原理图）73-DViewofDiaphragmWallConstruction89Woodensheet

8、pileandconcreteshee