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黄河小浪底坝址大跨度隧洞开挖试验,应用新奥法原理,在对围岩稳定性分析评价的基础上,采用光面爆破和喷锚网配合深孔预应力锚索的支护措施,在多种仪器监测下,顺利地穿越了缓倾角有夹泥层的碎裂砂页岩地层及沿洞线方向宽达15米的F_(236)断层砍碎带,取得了大量数据和资料,为小浪底工程建设提供了重要的科学数据,也可供其他类似地下工程参考。这里简要介绍了试验工程在光面爆破、喷锚网及深孔预应力锚索支护、围岩稳定性监测等方面所取得的成果。
Based on the analysis and evaluation of surrounding rock stability, based on the new Austrian law, based on the experiment of excavation of long-span tunnel in the Xiaolangdi dam site of the Yellow River, A great deal of data and data have been obtained under the monitoring of many kinds of instruments through the fractured sandstone shale with a smooth mud bed and the F_ (236) fault cut zone with a width of 15 meters along the tunnel line. Xiaolangdi project provides important scientific data, but also for other similar underground engineering reference. Here is a brief introduction of the experimental project in the smooth blasting, spray anchor net and deep-hole prestressed anchor support, stability monitoring of the surrounding rock and achieved results.