邻近管线的类矩形盾构隧道施工室内模型试验研究

doi:10.13722/j.cnki.jrme.2019.0282

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摘要关于盾构隧道施工引起管线变形和土层沉降的影响，相对于传统圆形盾构，类矩形盾构施工的研究较为少见，具有一定的新颖性。针对类矩形盾构隧道施工对邻近地下管线及土体沉降的影响，采用室内缩尺寸模型试验，考虑正常管线，非连续管线，非连续破损管线以及4种不同深度处的土体沉降的因素，分析砂土地层中，在管隧垂直工况下，类矩形盾构隧道开挖对地下管线变形及土体沉降的影响。试验结果表明：几种形式的地下管线沉降变形规律一致，均关于隧道轴线对称，呈“V”型分布；非连续管线最大沉降小于连续管线，管线两端在隧道宽度范围外的沉降大于连续管线；非连续管线弯矩变化趋势比连续管线缓和，最大正负弯矩值均小于连续管线；非连续破损管线在管线两侧负向弯矩变化较大；深层土体沉降符合高斯分布，土体最大沉降随土层埋深增加呈正比关系增大。

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	魏纲1
	王辰2
	丁智1
	尹鑫晟1
	丁玉琴1

关键词 ：隧道工程, 类矩形盾构, 模型试验, 非连续管线, 沉降, 弯矩

Abstract：Compared with the traditional circular shield，the research on the influence of shield tunnel construction on pipeline deformation and soil settlement is relatively rare and of certain novelty. For the influence of quasi-rectangular-type shield tunnel construction on adjacent underground pipelines and soil settlement，the indoor shrinkage model test is adopted，normal pipelines，non-continuous pipelines，discontinuous damaged pipelines and soil settlement factors under four different depths are considered. The deformation law of the deformation of the underground pipeline and the settlement of the soil in the sand-soil layer under the vertical conditions of the tunnel and the tunnel are analyzed. The test results show that the settlement and deformation laws of several types of underground pipelines are consistent，and the tunnel axis is symmetrical，and the distribution is V type. The maximum settlement of the discontinuous pipeline is smaller than that of the continuous pipeline，and the settlement of both ends of the pipeline outside the tunnel width is larger than that of the continuous pipeline. The change trend of bending moment of discontinuous pipelines is more relaxed than that of continuous pipelines，and the maximum positive and negative moment of discontinuous pipeline is less than that of continuous pipeline；The negative bending moment of the discontinuous damaged pipeline changes greatly on both sides of the pipeline；The settlement of deep soil conforms to Gaussian distribution，and the maximum settlement of soil increases with the increase of soil depth.

Key words： tunnel engineering quasi-rectangular shield model test discontinuous pipeline settlement bending moment

引用本文:

魏纲1，王辰2，丁智1，尹鑫晟1，丁玉琴1. 邻近管线的类矩形盾构隧道施工室内模型试验研究[J]. 岩石力学与工程学报, 2019, 38(S2): 3905-3912.
WEI Gang1，WANG Chen2，DING Zhi1，YIN Xinsheng1，DING Yuqin1. Study on indoor model test of similar quasi-rectangular shield tunnel adjacent to pipeline. , 2019, 38(S2): 3905-3912.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2019.0282 或 http://rockmech.whrsm.ac.cn/CN/Y2019/V38/IS2/3905

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