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首页> 外文会议>ITA-AITES world tunnel congress >Construction of Expressway Branch Junction Structure Using Non-Cut-and-Cover Enlargement Method to Combine Two Shield Tunnels in Sedimentary Soft Rock
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Construction of Expressway Branch Junction Structure Using Non-Cut-and-Cover Enlargement Method to Combine Two Shield Tunnels in Sedimentary Soft Rock

机译：沉积软岩中两个盾构隧道组合的非挖扩法施工高速公路分支结结构

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摘要

In order to construct an underground two-layer expressway branch junction structure with a height of 14.7 m and a width of 22.3 m, two shield tunnels in each layer were combined by using a non-cut-and-cover enlargement method in sedimentary soft rock. Before and during the construction work, preliminary analysis, in-situ investigations and laboratory tests were conducted to ensure the construction safety and to evaluate the deformation characteristics of sedimentary soft rock. The construction project was safely executed without any water leakage or collapse of tunnel working face. The predicted results from preliminary analysis were almost similar to the measured values. From the detailed investigation of measured results, it was confirmed that the deformation characteristic of the sedimentary soft rock was observed to a small extent as the ground deformation derived from construction work.
机译：为了通过高度为14.7μm和22.3μm的宽度构造地下两层高速公路分支结结构，通过在沉积软岩中使用非切割和盖的放大方法来组合每个层中的两个屏蔽隧道。在施工工作之前和在施工工作之前，进行了初步分析，原位调查和实验室测试，以确保建设安全，评价沉积软岩的变形特征。建筑项目安全地执行，没有任何漏水或隧道工作面的泄漏。初步分析的预测结果几乎类似于测量值。根据测量结果的详细研究，证实沉积软岩的变形特征在很小程度上观察到施工工作的地面变形。

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