| 摘要: |
| 【目的】研究湿陷性黄土地区砖石古塔“成孔 软化”纠偏技术的关键技术指标，实现纠偏过程的可控性。【方法】结合湿陷性黄土地基变形的特性，通过降低注水后地基土变形模量及强度指标以模拟黄土的软化，通过地基中软化土体积的增加来模拟注水量的增加，对陕西眉县净光寺塔纠偏的全过程进行数值模拟分析。【结果】纠偏过程中塔体一层底面附近的应力较大，应对该部位进行重点监测，必要时进行加固补强；当注水量达到12.31 m3时，塔体开始大幅回倾且回倾速率较快，塔体应力亦显著增大。【结论】获得了“成孔 软化”纠偏技术的关键技术指标。 |
| 关键词: 湿陷性黄土 砖石古塔 纠偏工程 数值分析 |
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| 基金项目:国家自然科学基金项目（50868011）；科技部西部科技行动计划项目（建科［2001］第002号（2001～2005）） |
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| Numerical analysis of deviation rectification process of for Masonry Pagoda |
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| Abstract: |
| 【Objective】The research was to study the key point of the technology of hole-drilled and soften,which is a deviated rectification technology for masonry pagodas in collapsible loess areas,so that the control of the process of deviated rectification can be achieved.【Method】In light of deformation characters of collapsible loess,the soften-loess after water injected was simulated by reduction deformation model and index of strength.The increase of water injection was modified by that of volumes of soften soil,the whole process of deviated rectification of Jingguang Pagoda was numerical simulated.【Result】The stresses in the bottom of the first floor of the tower are higher and that should be monitored or strengthened if necessary.After the volume of water injected reached 12.31 m3,a large range deviation is rectified fast and the stress of the tower is increased remarkably.【Conclusion】The key index of the technology of hole-drilled and soften is given. |
| Key words: collapsible loess masonry pagoda rectification construction numerical analysis |
