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针对传统地基沉降速率法存在的弊端,基于线性加载地基固结沉降的沉降速率法基本原理,将线性加载模式应用于堆石体指数型衰减蠕变模型,成功模拟了堆石体变形的时变规律。采用地基固结分析与堆石体道基蠕变分析耦合的方法,建立了用于道基工后沉降预测的道基顶沉降速率分析法,并进一步提出可考虑地基条件、工后沉降要求的道基顶沉降速率控制标准。通过国家重点工程的成功运用,验证这一方法的可靠性。道基表面沉降速率工程实践表明,该方法取消了填筑期沉降监测,避免了监测与施工的交互影响,具有普适性和工程实践价值。
Aiming at the shortcomings of traditional settlement rate method, based on the basic principle of settlement rate method of linearly loaded ground consolidation settlement, the linear loading model is applied to exponential decay creep model of rockfill body, and the time-dependent deformation of rockfill body is simulated successfully law. Based on the coupled method of foundation consolidation analysis and creep analysis of rockfill body, the method of settling velocity analysis of the foundation is established, which can be used to predict the settlement of roadbed after foundation construction. Furthermore, it is proposed that the settlement of foundation can be considered considering the conditions of foundation and post-construction settlement Sediment subsidence rate control standard. Through the successful application of national key projects, verify the reliability of this method. The practice of subgrade surface sedimentation rate shows that this method cancels the monitoring of subsidence during the filling period, avoids the interaction between monitoring and construction, and has universal value and practical engineering value.