【作者】 朱奎；

【导师】 龚晓南；

【作者基本信息】 浙江大学 ， 岩土工程， 2002， 硕士

【摘要】 挤土桩施工对环境影响问题越来越受到土木工程界的重视，但目前尚无成熟理论及计算方法。本文主要结合温州地区现状对打桩挤土引起环境影响及防治的措施等有关问题进行了研究。主要内容包括： 首先，在单桩挤土机理分析中，讨论了圆孔扩张理论，并对温州地区饱和粘土地基中挤土桩施工作了相应的分析。在考虑竖向平面内屈服的情况下对单桩挤土效应进行分析，研究了与沉桩挤土有关的土体强度问题。 其次，对单桩挤土引起的孔隙水压力进行分析研究，并结合实测资料探讨孔隙水压力的积累、消散规律及其影响。 再次，提出了一些预防或减缓挤土效应对周围环境影响的合理措施。并对这些防护措施效果进行对比分析。 然后，详细阐述了与挤土效应相关环境监测技术，提出了控制指标。 最后，联系工程实例对群桩施工中深层土体位移问题作了定性分析，总结出桩周土体位移变化的一般规律。更多还原

【Abstract】 The effect on environment during pile driving is received more and more emphases by civil engineers. There is still no perfect method for it . in this paper,some problem of environment’s effect by pile driving and safeguard is further studied according to wenzhou’s experience . The main original works include:Firstly,in the chapter of the mechanism of single pile squeezing against soil,the cavity expansion theory is discussed,and pile settlement in saturated clay in wenzhou is also analysed emphatically,the effect of squeezing against soil due to vertical soil yield is described. The soil strength parameter relating to pile driving is studied.Secondly,pore pressure in soil during pile driving is researched. On the basis of analysis of a large amount of observation datum,the regularity of accumulation,dissipation and influence of pore pressure are found.Thirdly,The author has put forward some effective measures to prevent or reduce the damages to the engineering environment in the vicinity,the author also analyses the different effect caused by different measure,the sheltering effect of driven piles is also discussed.Fourthly,the author has discribed environment monitoring technology relating to the effect of pile driving,and has proposed some operating index.At last,the problem of pile group is qualitatively analysed,some conclusions about soil displacement are obtained.更多还原