| 大荷载原煤仓天然地基沉降监测及分析 |
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| 引用本文： | 吕远强,赵金刚,冯伟,董转运.大荷载原煤仓天然地基沉降监测及分析[J].煤田地质与勘探,2018,46(4):122-128. |
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| 作者姓名： | 吕远强 赵金刚 冯伟 董转运 |
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| 作者单位： | 长安大学地质工程与测绘学院;中煤西安设计工程有限责任公司 |
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| 摘 要： | 为了真实反映大荷载原煤仓天然地基沉降变形随上覆荷载的变化特征及规律，确保工程安全，在研究区场地建立了一套沉降监测系统，跟踪测试了建设施工及运营期间荷载作用下原煤仓地基土的沉降变形，并依据实际监测结果，通过"规范方法"及"三维数值分析方法"进行了验证。结果表明:原煤仓地基实际变形满足规范要求的允许值，证明采用第四系湖积砂层作为天然地基方案是可行的；地基土实际沉降主要集中在运营期间，建设及施工阶段所占比例较小（10%~27%），而规范计算该阶段沉降所占比例在40%以上；在沉降计算及预测过程中考虑基础刚度的影响，所得基底土压力分布及沉降计算结果更符合现场实际。研究结果可为类似工程场地设计、建设及安全施工提供理论依据及参考。
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| 关 键 词： | 天然地基 沉降监测 演化规律 三维数值分析 |
| 收稿时间： | 2018-03-02 |
Monitoring and analysis of natural foundation subsidence of raw coal bunker with big load |
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| Abstract: | In order to reflect the characteristics and regularity of natural foundation subsidence of raw coal bunker with big load and to ensure the safety of the project, a set of subsidence monitoring system was built at the study site, after tracking ground subsidence of raw coal bunker with big load during construction and operation, we verified the "standard method" and "three dimensional numerical analysis method" according to the actual monitoring results. The results show that the actual deformation of the foundation of raw coal bunker met the allowable value required in norms and it was proved that the scheme using the Quaternary lacustrine sand layer as natural foundation was feasible; the actual subsidence of the foundation soil is mainly concentrated in the operation period, the proportion of the subsidence during construction stage is small(10% to 27%), while the proportion of subsidence during the construction stage, calculated in the norms is more than 40%. The influence of foundation stiffness during the calculation and prediction process was considered, the calculation results of the pressure distribution and the subsidence of the foundation soil were more consistent with actual situation. The research results can provide theoretical basis and reference for site design, construction and safe operation of similar project. |
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