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在软弱围岩隧道施工中,由于围岩软弱松散、破碎、整体性差,开挖过程中围岩受扰动易出现失稳坍塌等安全事故,稍有不慎就会给施工带来困难,延误工期,甚至会造成严重的安全事故,故对掌子面前方的围岩进行预报和探测显得尤为重要。准确的地质预报和岩性分析不仅可以弥补设计勘测中的不足,而且可以为进一步的施工处理提供必要的信息,及时调整衬砌参数,避免安全事故和成本损失。以武都西隧道为依托工程,采用地质雷达法和岩性分析等组成综合超前地质预报系统,对掌子面前方的富水、围岩岩性以及稳定性进行了综合分析和预判,为及时制订和处理预案提供了可靠的科学依据。
In the construction of weak surrounding rock tunnel, due to the weak loose loose rock, broken, poor integrity, rock disturbed during excavation prone to instability collapse and other accidents, a little careless construction will bring difficulties and delay the construction period , And even cause serious accidents. Therefore, it is especially important to forecast and detect the surrounding rock in front of the face of the palm. Accurate geological prediction and lithology analysis can not only make up for the shortcomings in design and survey, but also provide necessary information for further construction and disposal, adjust lining parameters in time and avoid safety accidents and cost losses. Based on the Wudu Xixi Tunnel, a comprehensive geological prediction system is established by using the methods of geological radar and lithology, and the comprehensive analysis and prediction of the lithology and stability of the rich water and surrounding rock in front of the face are carried out. The timely preparation and processing plans provide a reliable scientific basis.