摘要
通过采用荷载结构模式中连续的自由变形圆环法，对某城市地铁区间隧道衬砌圆环内力的计算，发现土的侧向抗力、侧土压力值对内力影响很大，特别是对弯矩的影响，这将对工程造价产生很大影响。提出如将抗力系数取为实验值１／４到１／６，或土压力系数稍高于静止土压力系数，将侧向抗力和侧向土压力综合考虑，内力计算结果将是合理的。
First, the authors computed internal force of shield tunnel's lining of a certain city by using the method of free deformed circular ring,and prove that the influence of soil's lateral force is very big to interanl force of tunnel,especial to the bending moment. The authors suggest: the internal force's value is rational if the coefficient of lateral resistant force is one - forth to one - sixth of tests value, or the coefficient of lateral soil pressure is bigger than the coefficient of earth pressure at rest, or the lateral resistant force is computed together with the lateral earth pres- sure.
出处
《城市轨道交通研究》
2001年第2期28-32,共5页
Urban Mass Transit
关键词
隧道开挖
土压力
盾构法
自由变形圆环法
衬砌圆环
侧土压力
tunnel excavation, shield method, free deformed circular ring, shield tunnel's ling, lateral resistant force, lateral soil pressure
