| 基于参数反演的堆载预压软土路基工后沉降及影响因素分析 |
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| 引用本文： | 娄霜.基于参数反演的堆载预压软土路基工后沉降及影响因素分析[J].路基工程,2014,0(3):179-183. |
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| 作者姓名： | 娄霜 |
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| 作者单位： | 安徽交通职业技术学院, 合肥 230051 |
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| 摘 要： | 针对某客运专线铁路软土地基分布广、厚度大和地基处理方式多样的特点，为保证路基工后沉降和稳定性满足规范要求，开展了超载预压现场试验，结合现场观测数据，采用广义开尔文流变模型进行地基参数反演，并进行铺轨施工数值模拟研究和工后沉降预测分析。分析结果表明:数值反演得到的地基参数合理可靠，经过三个月的堆载预压，工后沉降量较未堆载预压工况显著减小。路基填筑完成后的静置时间、堆载预压高度、预压时间对于工后沉降有显著影响，静置时间越长，其工后沉降量越小，增加堆载预压高度、预压时间均可以在短时间内加速地基固结沉降，减小工后
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| 关 键 词： | 软土路基 堆载预压 参数反演 工后沉降 |
| 收稿时间： | 2019-11-10 |
Study on Post-construction Settlement and Its Influence Factors of Stack Preloading Soft Soil Subgrade Based on Parameter Inversion |
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| Authors: | LOU Shuang |
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| Affiliation: | LOU Shuang ( Anhui Communications Vocational ＆ Technical College, Hefei 230051, China) |
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| Abstract: | According to the soft soil subgrade characteristics of wide distribution, great depth and various foundation treatment methods for passenger rail, the surcharge preloading tests are carried out to ensure the stability and settlement of the roadbed can meet the regulatory requirements. Combined with field observation data, using generalized Kelvin rheological model, parameter inversion of foundation, numerical simulation for laying construction and post-construction settlement prediction are analyzed. The results of analysis show that, the foundation parameters derived from the numerical inversion are reasonable and reliable. The settlement after preloading has reduced significantly after three months of preloading. The standing time after the roadbed construction, preloading height and time have significant effect to settlement after construction. The longer the standing time is, the smaller the settlement is. Increasing preloading height and times can accelerate ground consolidation settlement and reduce the settlement in a short time. |
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| Keywords: | soft subgrade stack preloading parameter inversion post-construction settlement |
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