下伏采空区对路基稳定性的影响研究-《郑州大学学报(工学版)》

文章信息/Info

作者:: 杨利民; 郭进军; 韩易辰; 郝莹莹; 1.中国建筑第七工程局有限公司,河南郑州,450004;2.郑州大学水利与环境学院,河南郑州,4500013.浙江东洲建设咨询有限公司,浙江杭州,310000

Author(s):: Yang Limin1; Guo Jinjun2; Han Yichen2; Hao Yingying3; 1. China Construction Seventh Engineering Bureau Co., Ltd., Zhengzhou, Henan, 450004; 2. School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou, Henan, 450001; 3. Zhejiang Dongzhou Construction Consulting Co., Ltd., Hangzhou, Zhejiang, 310000

Keywords:: mined-out area; subgrade stability; creep constitutive model; settlement; prediction model

摘要:: 为研究下伏采空区道路修筑技术，综合考虑采空区与道路的相对位置、采空区活跃状态等因素，结合实时监控数据，采用改进蠕变本构模型，分析计算了下伏采空区条件下路基沉降与水平变形规律。计算表明：处于活跃期的采空区对上方路基沉降变形的影响较大，约为稳定期采空区条件下沉降的5倍；当采空区边界距路基底侧80m以外时，可以忽略其对路基变形的影响。在此基础上，推导了矩形截面采空区上方路基沉降的三点法指数曲线预测模型，预测结果与工程监测数据吻合较好，可应用于下伏采空区道路的设计与施工。

Abstract:: To explore the road construction technology across the mined-out area, the relative position between goaf and road and the active state of the mined-out area were considered to analyzed the deformation law of subgrade. The improved creep constitutive model was adopted to simulate settlement and horizontal displacement of road. The critical safety range for road construction was determined in the mined-out area. The prediction model of subgrade settlement was proposed and compared with the accrual engineering monitoring data. The result shows that the model calculation results are in good agreement with the actual data, and the prediction model can be applied to the design and construction of the road above the mined-out area.