【作者】 衡涛；

【导师】 米海珍； 宋彧；

【作者基本信息】 兰州理工大学 ， 岩土工程， 2007， 硕士

【摘要】 根据已报道的技术文献，对建筑物纠倾技术的研究重点，更多着眼于纠倾方案的选定、纠倾施工工艺的要求以及严密的变形监测等方面，大多忽视理论分析的指导作用，纠倾效果主要通过技术人员的数据监测或纠倾经验来控制。本文应用ADINA有限元分析软件，在确定了有限元单元类别、材料属性、载荷、边界条件和分析类别、求解器与收敛准则等与有限元建模有关的内容的基础上，建立纠倾地基土的三维Mohr—Coulomb模型，确定应力解除法、应力附加法的挖槽深度、挖孔进深与纠倾效果之间的关系，主要从以下8个方面进行了分析与讨论：1．建筑物在使用阶段的实际沉降；2．确定建筑物纠倾的最佳方案；3．工程实例中不同纠倾方法的效果；4．应力解除法的挖槽深度对建筑物沉降影响；5．应力解除法的挖槽深度对地基应力分布影响；6．应力附加法的钻孔进深对建筑物沉降影响；7．应力附加法的钻孔进深对地基应力分布影响；8．理论模拟结果与实际工程监测数据的比较。分析结果表明：1．挖槽深度为6～7.5m时，应力解除纠倾方法效果最佳；2．挖孔进深为5～7m时，应力附加纠倾方法效果最明显；3．对工程纠倾结果和模拟计算结果进行了比较分析，二者保持相同趋势。更多还原

【Abstract】 According to the papers about inclination-rectifying technique of the building, all of the study focused on the method-chosen, the construction craft and deformation-monitor. In most of these works, the instructional functions of theoretical analysis were neglected for many reasons, but the effect of inclination-rectifying mainly depends on the data-monitored or the engineering experiences. In this article, ADINA finite element analysis software was applied.Based on the finite element model analysis——including the choose of unit type,the defining of material attribute, the enforcement of load and boundary condition , the determination of analysis category and solution method, the consideration of restrain criterion, three-dimensional Mohr-Coulomb analysis model of foundation soil was established. In the end the relations between the vertical and horizontal dig depth and the inclination -rectifying efficiency of tress relief and the stress-attach methods were ensured. The analysis and discussion mainly focused on the following 8 aspects:1. Study on the actual subsidence of building in operational phase.2. Determination of the best presume method of inclination-rectifying of building.3. Study on the effect of differently inclination-rectifying based on practical engineering project.4. Study on the influence of vertical channel-dredging depth to building subsidence in the stress relief method.5.Study on the influence of vertical channel-dredging depth to ground stress distribution in the stress relief method.6. Study on the influence of horizontal dig-holes depth to building subsidence in the stress-attach method.7. Study on the influence of horizontal dig-holes depth to ground stress distribution in the stress-attaches method.8. Comparison between theory analogue result and actual project monitor data.Based on the careful analysis some results were concluded:1.The best presume depth of channel-dredging is 6～7.5m in the stress relief method.2. The best presume depth of dig- hole is 5～7m in the stress-attaches method.3. According to the comparative analysis between practical engineering projects and computation results, both of them had the same development trend.更多还原