cdm工法计算理论的改进及验证

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1、天津大学硕士学位论文CDM工法计算理论的改进及验证姓名：王永强申请学位级别：硕士专业：水利工程指导教师：闫澍旺;朱平2001.8.1本文对目前CDM工法的计存在的问题和设计理论在计算外不足之处，说明原设计理论是偏析，指出了其计算模型定承载力等方面存在的的计算方法、拌和体的内力和强度的计算方法和地基承载力的计算方法等方面进行了改进，同时补充了拌和体底部摩擦力的计算方法，使CDM的设计理论和计算模型更加合理。天津港南疆煤码头引桥接岸结构CDM搅拌体是第一例采用新的设计理论进行设计的，通过对现有的陆上施工设备在打设深度、电机功率、桩机稳定性和质量监测

2、系统等方面的改进和研制，使之适用于海上工程并圆满地完成了该工程的施工任务。施工过程中在拌和体的内部和附近埋设了多种监测仪器，在上部结构施工期间和引桥通车后的使用过程中，对拌和体的沉降、位移、内部应力和侧壁土压力进行观测，观测结果验证了新的CDM工法基本计算理论和设计方法的正确性，使得CDM工法已经成为质量高、成本低、技术成熟、易于推广应用的软基处理技术。√Li，L一关键词：CDM工法、粘结力、摩阻力、脱离体、验汪AbstractDetailedanalyseshavebeenmadeforthepresenttheoryofcomputatio

3、nfortheCDMmethod．Problemsinthecomputationmodelandtheshortcomingsofthecomputationtheoryincalculatingtheexteriorandinteriorstabilityandvalidatingthebearingcapacityareexpoundedinthepaper,indicatingthattheinitialcomputationtheorytendstobeconservative．Improvementsaremadetothecomp

4、utationmethodforcalculatingearthpressure．thecomputationmethodforinternalforceandstrengthofthecement．soilmixture．aswellasthecomputationmethodforgroundbearingcapacity．Thecomputationmethodforthefrictionforceinthebottomofthecement-soilmixtureisalsosupplemented．BySOdoing，thedesig

5、ntheoryandthecomputationalmodelsforCDMbecomemoreadequateandreasonable．Thecement．soilmixturebvCDMfortheshoreconnectionstructurefortheapproachtrestleofNanjiangCoalTerminali13TianjinPortwasthefirstcaseinwhichthenewdesigntheorywasemployed．Thelandbasedequipmentandfacilitieswerejn

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7、heexecutionofthejob，quiteanumberofmonitoringinstrumentswerei13stalledinsidethecement-sollmixtureandinthesurroundingareaofthemixturetOmonitorandobservethesettlement．displacement，intemalstressandlateralearthpressureofthecement-soilmixtureduringtheconstructionofthesuperstructur

8、eandaftertheapproachtrestlehasbeeninuse．Theresultsofmonitoringandobservatio