薄壁无筋隧洞底板在地下水作用下拱起开裂的原因分析及预防处理

The Causes that the Thin Non-reinforced Concrete Base plate of Tunnel Lining Humped and Cracked Under Groundwater Action and Preventive Treatment

薄壁无筋隧洞底板,在地下水较为发育的洞段,经常会出现地下水扬压力将底板拱起、并至其开裂的问题。结合赵山渡引水工程隧洞底板混凝土的拱起开裂及其处理情况,分析了隧洞底板拱起开裂的原因,并提出了预防底板拱起开裂的方法和处理措施。

In the tunnel sections where the groundwater is more plentiful,due to the action of groundwater uplift pressure,usually the thin non-reinforced concrete base plate of tunnel lining humps and even cracks.By combining the humping and cracking of concrete base plate of tunnel in Zhaoshandu Water Diversion Project with its treatment situation,the article analyzes the causes that the humping and cracking of base plate occur and puts forward some methods and treatment measures to prevent humping ＆ cracking of base plate.