浅埋黄土隧道掌子面前方围岩变形规律研究

Study on Deformation Rule of Surrounding Rock in Front of Shallow Loess Tunnel Face

现有地铁施工多通过注浆法加固前方土体以达到控制变形的目的,但对掌子面前方的围岩变形难以测量,注浆对前方土体的效果则更加难以预测。为此,通过室内试验模型,模拟不同注浆效果下的隧道开挖掌子面前方围岩的受力状态及变形,并结合工程实际,特别研究了浅埋黄土隧道掌子面前方围岩变形规律与影响范围。

The existing subway construction mostly uses grouting method to reinforce the front soil to achieve the purpose of controlling deformation, but the deformation of surrounding rock in front of the tunnel face is difficult to measure, and the effect of grouting on the front soil is more difficult to predict. Therefore, through laboratory test model, the stress state and deformation of surrounding rock in front of tunnel excavation face under different grouting effects are simulated. Combining with engineering practice, the deformation gauge and influence range of surrounding rock in front of shallow loess tunnel face are studied in particular.