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首页> 外文会议>International Forum on Energy, Environment Science and Materials >Model Test Research on Excavation Method of Large-span and Shallow-buried Bias Tunnel in Cobble and Gravelly Soil Layer
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Model Test Research on Excavation Method of Large-span and Shallow-buried Bias Tunnel in Cobble and Gravelly Soil Layer

机译：鹅卵石和砾石土层大跨度浅埋偏置隧道挖掘方法的模型试验研究

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摘要

In order to select reasonable excavation method of tunnel engineering in complex conditions, model test was done for large-span and shallow-buried bias tunnel in cobble and gravelly soil layer, the reasonable excavation scheme was determined by analysis of tunnel surrounding rock and internal support stress after excavation. The bench cut method and the four-partial excavation method with temporary diaphragm in top heading are adopted to excavate model tunnel. It is resulted that the reasonable excavation method is the four-partial excavation method with temporary diaphragm in top heading. The large-span and shallow-buried bias tunnel in the cobble and gravelly soil layer is excavated from the shallow excavation site and has less deformation than that of the deep excavation. Model test can correctly reflect some changes of the real formation, and some problems in the construction process can be prevented in advance.
机译：为了在复杂条件下选择隧道工程的合理挖掘方法，在鹅卵石和砾石土层中进行大跨度和浅埋偏置隧道进行模型试验，通过分析隧道周围岩石和内部支撑来确定合理的挖掘方案挖掘后压力。采用基准切割方法和顶部标题中临时隔膜的四部分挖掘方法来挖掘模型隧道。结果，合理的挖掘方法是具有临时膜片中的四部分挖掘方法。在鹅卵石和砾石土层中的大跨度和浅埋偏置隧道从浅挖挖掘部位挖掘，并且具有比深度挖掘的变形更少。模型测试可以正确反映实际形成的一些变化，并且可以提前防止施工过程中的一些问题。

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