Effect of shield tail void closure on lining earth pressure

摘要

Shield tunneling method is often used to built a tunnel in soft soil ground. The earth pressure acting on the lining structure may be affected by various conditions, such as the soil properties, overburden thickness, construction technology, etc. This paper introduces a centrifugal test study of the effect of tail void closure on earth pressure to which lining structure is subjected. Test result shows strong arching action of sandy soil and very small earth pressures acting on the tunnel lining dueto the tail void closure.