横穿滑坡变形区隧道受力变形规律及影响因素分析

doi:10.13722/j.cnki.jrme.2015.0628

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摘要横穿滑坡变形区的隧道受力十分不利，为研究滑坡推力作用下隧道的受力变形规律，首先，建立隧道与滑坡土体相互作用的弹性围岩–隧道结构梁模型，采用传递矩阵法推导内力和位移的传递矩阵计算式；然后，通过MATLAB编程，对隧道内力和位移分布特征以及重要参数的影响进行计算分析；最后，采用物理模型试验，验证理论计算结果的正确性。研究结果表明：(1) 当隧道横穿滑体较长时，隧道中部一定范围内的内力几乎为0，隧道弯曲变形程度很小，主要表现为整体位移，主要受滑坡体内的法向地基系数、滑坡推力大小及其分布形式的影响；(2) 滑床内的稳定岩土体对滑体内的隧道起到“锚固”作用，隧道与滑面交界附近范围内隧道受力变形状态最差，最易发生破坏；(3) 物理模型试验得到的结果与理论计算结果相吻合，验证了理论计算方法及结果的正确性。

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	尹静1
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	邓荣贵1
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	李凯甜1
	孙春平2

关键词 ：隧道工程, 滑坡隧道, 弹性地基梁, 传递矩阵法, 内力, 位移, 物理模型试验

Abstract：The stress of the tunnel across landslide deformation zone is very unfavorable. In order to study the stress and deformation laws of the tunnel under sliding force，firstly，the model of elastic rock-the tunnel structure is built on the basis of the interaction between tunnel and soil landslide. The matrix transfer method is adopted to establish the calculation formulas of internal force and displacement of the tunnel. Secondly，the distribution characteristics of the tunnel internal force and displacement and the influence of some important parameters are analyzed by MATLAB programming. Finally，the physical model test is carried out to verify the theoretical results. The studies indicate that，when the across segment of tunnel is long，the internal force is almost zero in a certain range of middle tunnel，and the degree of tunnel bending deformation is small，mainly presented global displacement，which is mainly controlled by the vertical foundation coefficient，the value and distribution of sliding force. The stable rock mass outside the landslide has an anchor effect on the tunnel. The force and deformation state of tunnel is the worst near the boundary of the tunnel and sliding surface，where the tunnel is most prone to failure. The results of physical model test are in good agreement with the theoretical calculation results，which verify the correctness of the theoretical calculation method and results.

Key words： tunnel engineering landslide tunnel elastic foundation beam transfer matrix method internal force displacement physical model test

引用本文:

尹静1，2，邓荣贵1，钟志彬1，李凯甜1，孙春平2. 横穿滑坡变形区隧道受力变形规律及影响因素分析[J]. 岩石力学与工程学报, 2016, 35(S2): 3615-3625.
YIN Jing1，2，DENG Ronggui1，ZHONG Zhibin1，LI Kaitian1，SUN Chunping2. Stress and deformation laws and influence factors analysis of tunnel across the slope deformation zone. , 2016, 35(S2): 3615-3625.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2015.0628 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS2/3615

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