【作者】 胡琦；

【导师】 朱国元； 蒋军；

【作者基本信息】 浙江大学 ， 防灾减灾及防护工程， 2004， 硕士

【摘要】 纠偏技术的理论研究，大多单纯着眼于土体在应力释放后自身的变形状况，很少考虑到结构和基础的变形及上部荷载的变化与土体变形的相互影响。本文借鉴结构设计中的基础与上部结构共同作用理念，运用ANSYS有限元分析软件，在探讨了单元类别的选择、材料属性选择、载荷、边界条件和分析类别的确定、求解器、求解方法与收敛准则的选择等与有限元建模相关内容的基础上，建立了上部结构和土体共同作用的三维有限元模型。对掏土纠偏过程做了以下9个方面的分析： 1、土体在自重作用下的沉降分析； 2、建筑物在使用阶段的沉降分析； 3、建筑物在使用阶段的内力分析； 4、土体受扰动类型分析； 5、均匀冲水施工过程分析； 6、同一个地方冲水量大小不同对建筑物沉降影响分析； 7、不同沉井冲水对建筑物沉降影响分析； 8、进深不同的土层冲水对建筑物沉降影响分析； 9、不同埋深土体冲水对建筑物沉降影响分析。 得出不均匀沉降结构的内力分布情况与普通结构的区别，冲水掏土纠偏过程中建筑物沉降的规律，以及不同施工方法对沉降的影响。 最后总结了冲水掏土纠偏过程中建筑物沉降的规律，以及本方法的不足之处。更多还原

【Abstract】 Most of the theoretical researching of correcting building technique skimpily focalized point on deformation of soil released stress. The change of loading and deformation of foundation and structure were seldom considered. Based on the theory of cooperation between foundation and structure, paper uses ANSYS finite element software forming three-dimensional finite element model of. Paper also anglicized element type choose , material attribute choose , loading determination, terminal condition determination , anyslys type determination and solution choose, etc. Correcting Buildings with the Method of Drawing out Soil was analyzed through ninth aspects listed below.1 Sedimentation anyslys of soil under the action of deadweight;2 Sedimentation anyslys of structure in using;3 Endogen force anyslys of structure in using; 4 Soil remolding type anyslys;5 Homogenous flush works anyslys;6 Anyslys of the structure sedimentation effects of different flushing amount atthe same place;7 Anyslys of the structure sedimentation effects of different flushing places; 8 Anyslys of the structure sedimentation effects of different horizontal flushingplaces; 9 Anyslys of the structure sedimentation effects of different vertical flushingplaces;Getting the different between the endogen force of common structure and that of slant structure. The rule of stricture sedimentation and the effect of different Soil remolding type were also gained.In the end, paper generalized the rule of stricture sedimentation when the soil was flushed and the shortage of this anyslys method.更多还原