【摘要】 对处于天津地铁2号线的建国道站～天津站区间隧道修复工程,为减小隧道修复对地层的扰动,必须采用盾构法进行施工。然而,由于普通加固法难以对修复前的土体进行加固,为了更加安全与经济地进行修复,需采用人工冻结法。为了给该修复工程提供冻结法设计参数和确保冻结施工过程的安全,对其典型土层进行了室内实验研究,确定了土体抗压强度、弹性模量、泊松比、剪切强度在不同温度下的损坏状态及其随温度变化的规律,根据所绘制的实验曲线作出了定量分析,得出了具有重要意义的结论。更多还原

【Abstract】 In restoration project of tunnel section from Jianguo Road Station to Tianjin Railway Station of subway line 2 in Tianjin City,in order to reduce disturbance of the project to strata shield construction method must be used.However,due to the ordinary reinforcement method is difficult to reinforce the soil before restoration,in order to ensure safer and more economic construction use of artificial freezing method is required.In order to provide design parameters for freezing method used in the restoration project and ensure safety in the freezing construction process,indoor experimental study on the typical soil was conducted to determine the damage states of soil compressive strength,elastic modulus,Poisson’s ratio,shear strength at different temperature and their changes with temperature.According to the plotted experimental curves quantitative analysis was made,and conclusions with important significance were drawn out.更多还原