论文部分内容阅读
依托工程实例,基于双塌落拱假定,并考虑偏压地形产生的地层推力对连拱隧道衬砌结构造成的影响,建立改进的结构-荷载模型进行偏压连拱隧道衬砌结构荷载计算,并与地层-结构模型以及监测数据比较,得到改进的结构-荷载模型的适用性。结果表明,在隧道周边围岩状态较差,隧道开挖可能引起边坡滑移的情况下,改进的结构-荷载模型可以很好地预测隧道结构的危险位置,适用性较好;对于围岩条件较好或者偏压地形作用不明显时,计算结果相比地层-结构模型以及实测数据更安全。
Based on the engineering example, based on the assumption of double slump arch, and considering the influence of formation thrust generated by the bias topography on the lining structure of multi-arch tunnel, an improved structure-load model is established to calculate the load of lining structure of the double- Stratigraphic-structural models and monitoring data to obtain improved structural-load model applicability. The results show that the improved structure-load model can predict the dangerous position of the tunnel structure well and has good applicability under the conditions of poor surrounding rock and tunneling caused by the tunnel excavation. When the condition is good or the effect of bias topography is not obvious, the calculation result is safer than the stratum-structure model and the measured data.