地基处理强夯法（英文PPT） .ppt

我们毕业啦 其实是答辩的标题地方 地基处理强夯法（动力固结法） 汇报人 指导老师 introduction preliminary evaluation design considerations contracing procedures constraction monitoring content adjustments during dynamic 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 1 categorize soil type: (1) site investigation (2) general description of soil categories assess site restraints: (1) ground vibrations (2) lateral ground displacements (3) high water table (4) presence of hard or soft layers 2 determine design requirements: (1) tolerable settlement (2) minimum soil property (3) depth of improvement limitation 3 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 plan multiple passes area 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 considerations grid spacing and number of drops surface stabilizing layer applied energy requirements selection 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 height n 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 densify dynamic compaction is generally completed over an area larger than the plan area of the embankment or the loaded area. grid spacing and number of drops a drop point spacing of 1.5to 2.5 times the diameter or width of the tamper is common. multiple passes the 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 layer at sites where the surface is in an extremely loose condition, such as an old landfill, it might be necessary 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 specifications preparation 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 tamper providing the proper equipment with a single cable to raise and drop the tamper equipment providing sufficient cables, swivels, and other equipment other equipment maintaining 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 passes records maintaining 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 description work area equipment required energy application backfill and ground leveling required testing recordkeeping payment 问题讨论研究结果研究背景研究方法 text i ar s providing subsurface information including the geotechnical report to the bidders information defining the extent of the area to be improved. area listing the minimum prequalification requirements requirements specifying 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 description work area required improvement prequalification time during for dynamic compaction site preparation required testing recordkeeping payment close 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 4 23 induced settlement a rise in ground surface between drop point locations is an indication of plastic soil deformation associated with high pore water pressures multiple passes with enough delay pore water pressure measuring units ground heave and pore water pressure vibration readings should be taken using a seismograph. the particle velocity measurements should be below the permissible values . ground v