基于改进灰色理论模型的隧道围岩变形预测

发布时间：2018-02-03 10:00

本文关键词： 灰色预测位移预测掌子面　出处：《公路工程》2017年05期 　论文类型：期刊论文

【摘要】：应用灰色预测理论方法建立隧道围岩位移预测模型,给出了灰色预测理论的计算步骤和方法,并在此基础上预测得出隧道施工过程中掌子面前方一定范围内的围岩变形值。以武靖高速公路绥通隧道为试验对象,对比分析了预测值、实测值之间位移-时间曲线的关系,并对以上二个值进行交叉验证。验证结果表明,此模型能较好地体现围岩的应力应变变化规律,对位移值的预测精度能满足规范要求,在实际隧道工程围岩稳定性预测中比其它方法具有更大的适用范围。
[Abstract]:The prediction model of surrounding rock displacement of tunnel is established by using grey prediction theory, and the calculation steps and methods of grey prediction theory are given. On the basis of this, the deformation value of surrounding rock in front of the face of tunnel in the course of tunnel construction is predicted. Taking Suitong Tunnel of Wujing Expressway as the experimental object, the predicted value is compared and analyzed. The relationship between the measured values and the displacement-time curves, and the above two values are cross-validated. The results show that the model can better reflect the stress-strain variation law of surrounding rock. The prediction accuracy of displacement value can meet the requirements of the code, and it has a wider range of application than other methods in predicting the stability of surrounding rock in actual tunnel engineering.
【作者单位】：湖南联智桥隧技术有限公司;中南大学有色金属成矿预测与地质环境监测教育部重点实验室;湖南工业大学;
【基金】：国家自然科学基金项目(51108176)
【分类号】：U456.31
【正文快照】： 1概述隧道的开挖掘进对围岩形成了较大的扰动,破坏了原岩应力原来的平衡状态,从而导致围岩卸荷后不可避免的产生形变,直接影响隧道工程的施工决策。所以,对围岩的变形进行监测并科学地预测预报,不仅是隧道工程最大限度地实现安全性和经济性统一的关键,也是进一步对围岩稳定性

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