摘要
上海软土地区所建的地铁,在运营期间突出的问题是衬砌渗漏水和隧道纵向沉降。渗漏水使纵向沉降增大,纵向沉降的增大又会加剧渗漏,恶性循环,严重影响地铁的运营安全。为此,采用离心模型试验来研究在衬砌发生渗漏水的条件下,隧道纵向长期沉降的发展规律和隧道的力学特性。研究结果表明:隧道渗漏水会加剧纵向沉降和弯矩,增大隧道断面的应力。
In Shanghai,the prominent problem of subway built in soft soil area is water leakage of lining and longitudinal settlement of tunnel in the operation period. The water leakage may aggravate the longitudinal settlement while the deterioration of longitudinal settlement may aggravate the leakage,which forms a vicious circle and seriously influences the operation safety of subway. Therefore,the centrifugal model test is adopted to research the development law and mechanical properties of tunnel under long-term longitudinal settlement of tunnel in case of water leakage of lining. The research results show that the tunnel water leakage will aggravate the longitudinal settlement and bending moment and increase the stress on tunnel section.
出处
《路基工程》
2016年第3期104-107,123,共5页
Subgrade Engineering
关键词
软土地区
地铁隧道
渗漏水
离心模型试验
纵向沉降
隧道力学特性
soft soil area
subway tunnel
water leakage
centrifugal model test
longitudinal settlement
mechanical properties of tunnel
