摘要
本文明确了隧道稳定性及其位移极限状态的概念 ,提出了隧道稳定性可通过隧道位移来体现和判别。以隧道位移为判据的隧道稳定性分析的关键和难点是围岩及支护结构的位移极限值的确定。根据隧道的变形动态信息反推围岩参数和支护结构实际所受荷载为输入参数 ,进行隧道极限位移的计算模拟 ,辅以室内模拟试验验证和现场资料调查整理的综合手段来确定 ,更能反映隧道的现场实际。本文还介绍了实测位移的时间序列组合模型分析、位移随机反分析、位移随机插值的方法。以隧道周边位移为依据 ,建立隧道稳定性判别准则以及设计体系。它可以直观地与现场量测联系起来 ,建立反馈系统实施控制 ,真正体现隧道施工中的反馈信息、指导施工。
This paper defines the conception of stability and displacements limit of tunnel. The stability criterion and predicating method are established by measured displacements and limit displacements of tunnel. The essential obstacle is the determination of displacements limit of the surrounding rock and the supporting structure. According to the dynamic information of the tunnel variation, we inversely obtain the surrounding rock parameters and take as input parameters the actual load borne by the supporting structure. Then the imitation calculation of the tunnel extreme displacement is carried out and is assisted by a physical model and a case study. A more general time series associate model, the back analysis and the spine interpolation function are used to analyze the measured displacement in tunneling. The stability criterion and design method are established by the measured displacements and limit displacements of tunnel. By this means, the characteristics of ″feedback″ design and construction, and information feedback in NATM can be expressed.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2001年第6期80-83,共4页
China Railway Science
基金
铁道部工程建设科研项目 ( 94 11)
