SURROUNDING ROCK PRESSURE OF SHALLOW TUNNEL IN ROCK

摘要

As for shallow tunnels through the rock layers, the stability of the overburden rock has a decisive role on the tunnel stability; furthermore, analyzing the stability of the overburden rock and surrounding rock pressure is very important to the supporting design and the choice of excavation method.Method of elastic foundation beam is used to research the moment of overburden rock, and the formula of overburden rock stability and surrounding rock pressure is finished.Seven sections of Jiaozhou bay subsea tunnel are took for example to analyze the surrounding rock pressure ,then the results of theoretical calculation and field data are given at the last of the paper.Studies have shown that as for shallow tunnel in hard rock, the rock pressure calculation method are consistent with the measured results.