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在实际的隧道掘进过程中,往往会遇到膨胀岩石的地层。由于膨胀岩其遇水快速膨胀,使岩体软化、泥化,失水后又收缩干裂,自身强度降低的特性使施工的难度大大提高,影响了施工的进度和隧道的稳定性。文章阐述了膨胀岩的基本特征及其对隧道稳定性的影响,并提出了膨胀岩隧道的施工对策。
In the actual tunneling process, often encounter the expansion of the rock formation. Due to the rapid expansion of the expansive rock with water, the rock mass softens, mud and water shrink and then shrinks. The reduced strength of the rock causes the construction difficulty to be greatly increased, which affects the progress of the construction and the stability of the tunnel. The article expounds the basic characteristics of expansive rock and its impact on the stability of the tunnel, and puts forward the construction measures of the expansive rock tunnel.