大保高速公路四角田膨胀岩隧道施工技术

Construction Technology for Tunneling in Swelling Rock

膨胀岩具有遇水快速膨胀 ,使岩体软化、泥化 ,失水后收缩干裂 ,自身强度降低的特性 ,容易引起隧道已施工完毕的结构出现拱墙错台、拱底起鼓、二衬开裂等多种病害。结合施工实际情况 。

The swelling rock inflates when it absorbs water, and then becomes soft and muddy. It shrinks and splits after losing water. These characteristics may easily cause tunnels diseases like arch wall dislocation, arch bottom heave, and splitting of secondary lining. An introduction is given to tunneling technology for this geological condition.