地基处理强夯法(英文).pptx

IntroductionPreliminary evaluationDesign considerationsContracing proceduresConstraction monitoringCONTENTAdjustments duringdynamic compaction介绍预先评估设计考虑招投标程序建设监管 The mass of the tampers generally ranges from 5.4 to 27.2 Mg,and drop heights range from 12.2to 30.5 m.Lighter tampers and smaller drop heights result in depths of improvement on the order of 3.0 to 4.6 m.Heavier tampers and greater drop heights result in improvements on the order of 6.1 to 9.1 m“”强夯调整1Categorize soil type:(1)Site Investigation(2)General Description of Soil CategoriesAssess site restraints:(1)Ground Vibrations(2)Lateral Ground Displacements(3)High Water Table(4)Presence of Hard or Soft Layers2Determine design requirements:(1)Tolerable Settlement(2)Minimum Soil Property(3)Depth Of Improvement Limitation3论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整Estimate costs:(1)Dynamic Compaction Costs(2)Alternate Ground Improvement Techniques4论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整1.Selection of the tamper mass and drop height to correspond to the required depth of improvement.2.Determination of the applied energy to be used over the project site to result in the desired improvement.3.Selection of the area to densify.4.Determination of the grid spacing and number of phases.5.Establishing the number of passes.6.The need for a surface stabilizing layer.研究背景研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整DEVELOPMENT OF DESIGN PLANMULTIPLE PASSESAREA TO DENSIFY论文绪论研究背景研究方法研究结果问题讨论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整Design considerationsGRID SPACING AND NUMBER OF DROPSSURFACE STABILIZING LAYERAPPLIED ENERGY REQUIREMENTSSELECTION OF TAMPER AND DROP HEIGHT论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整SELECTION OF TAMPER AND DROP HEIGHTn has been found at project sites to range from 0.3 to 0.8.The variation in n is attributed to the:Efficiency of the drop mechanism of the crane.Total amount of energy applied.Type of soil deposit being densified.Presence of energy absorbing layers.Presence of a hard layer above or below the deposit being densified.Contact pressure of the tamper.论文绪论研究背景研究方法研究结果问题讨论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整APPLIED ENERGY REQUIREMENTS研究背景研究方法研究结果问题讨论AREA TO DENSIFYDynamic compaction is generally completed over an area larger than the plan area of the embankment or the loaded area.GRID SPACING AND NUMBER OF DROPSA drop point spacing of 1.5to 2.5 times thediameter or width of the tamper is common.MULTIPLE PASSESThe number of drops that can be applied at a grid point location at onetime could be limited by the depth of the crater.SURFACE STABILIZING LAYERAt sites where the surface is in an extremely loose condition,such as an old landfill,it might beNecessary to add a stabilizing surface material of granular soil to form a working mat.论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整If the design agency and/or their consultant do not have expertise in dynamic compaction,a performance type contract should be selected for the work.performance specificationsPreparation of a method specification requires knowledge of the various facets of dynamic compaction either within the design agency or by their consultants.method specifications 研究背景研究方法研究结果问题讨论论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整研究背景研究方法研究结果问题讨论论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整Two basic types of specifications are used for dynamic compaction projects:method specifications and performance specifications.Providing a tamper of the prescribed size tamperProviding the proper equipment with a single cable to raise and drop the tamperequipmentProviding sufficient cables,swivels,and other equipmentother equipmentMaintaining safety at the job site including a safe working distance safety研究背景研究方法研究结果问题讨论论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整研究背景研究方法研究结果问题讨论论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整研究背景研究方法研究结果问题讨论论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整method specifications The contractors primary duties：Keeping records of the number of drops,the number of passesrecordsMaintaining production to meet the schedule assigned for the project.schedule研究背景研究方法研究结果问题讨论论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整method specifications General descriptionWork areaEquipment requiredEnergy applicationBackfill and ground levelingRequired testingRecordkeepingPayment问题讨论研究结果研究背景研究方法TEXTIARSProviding subsurface information including the geotechnical report to the biddersinformationDefining the extent of the area to be improved.areaListing the minimum prequalification requirements requirementsSpecifying the end product to be achieved.specify论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整performance specifications研究背景研究方法研究结果问题讨论论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整研究背景研究方法研究结果问题讨论论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整Project descriptionWork areaRequiredimprovementPrequalificationTimeduring fordynamiccompactionSite preparationRequired testingRecordkeepingPaymentClose coordination between the design engineer and the person writing the specifications is essential！问题讨论研究结果研究背景研究方法423Induced settlementA rise in ground surface between drop point locations is an indication of plastic soil deformation associated with high pore water pressuresMultiple passes with enough delayPore water pressure measuring unitsGround heave and pore water pressureVibration readings should be taken using a seismograph.The particle velocity measurements should be below the permissible values.Ground vibrations论文绪论论文总结问题讨论研究结果研究背景研究方法论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整1MONITORINGCompete some of the soil borings with in situ tests to determine if the required depth and degree of improvement has been attained.To measure the delayed improvement,additional soil borings and in situ testing should be taken approximately one month.Verification testing问题讨论研究结果研究背景研究方法论文总结ABCMultiple phases and passesThickness of granular working matGround water control论文绪论问题讨论研究结果研究背景研究方法论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结研究背景研究方法研究结果问题讨论论文绪论论文总结论文绪论研究背景研究方法研究结果问题讨论论文总结介绍预先评估设计考虑招投标程序建设监管强夯调整DGround vibrationsBuried energy absorbing layersETHANKS