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施工监测是地下工程施工的重要环节之一。万家寨引黄工程南干1#洞黄土洞段由于施工方法得当,质量控制严格,同时配合了必要的现场量测并及时进行科学分析,从而保证了安全正常施工。现场量测结果表明,按目前设计的刚性结构一次支护施工,围岩变形、收敛值远小于通常情况的变形值。这说明一次支护结构承担了很大一部分山岩压力,这同新奥法原则存在相当大的区别。由于刚性结构容许变形量值极小,在围岩地质条件恶劣的情况下,要特别注意结构变形的监测和分析,以确保施工安全。
Construction monitoring is an important part of underground construction. Wanjiazhai Yellow River Diversion Project South 1 # hole loess section of the loess due to proper construction methods, strict quality control, with the necessary field measurements and timely scientific analysis, thus ensuring the safety of normal construction. Field measurements show that, according to the current design of a rigid structure of a support construction, surrounding rock deformation, the convergence value is much smaller than the usual deformation values. This shows that once the support structure takes a large part of the rock pressure, there is a considerable difference with the new Austrian law. Due to the rigid structure allows a very small amount of deformation, in the case of poor geological conditions surrounding rock, pay special attention to structural deformation monitoring and analysis to ensure construction safety.