盾构法隧道冻结法强度验算

针对某隧道对接区冻结方案的设计计算,给出2种方法:常规的设计计算方法和三维有限元方法。采用这2种方法对东部接头冻结加固方案进行计算,并对结果进行比较分析;采用三维有限元法对西部接头对接区土体加固方案也进行了分析。从中可见,常规的冻结帷幕设计计算方法可以适用于对冻结帷幕厚度的简单设计计算,而三维有限元方法更加适合于对冻结帷幕进行全面的应力和位移分析,从而使设计更加优化。

Strength Checking Computations of Shield Tunnel Freezing Method

This paper provides two kinds of methods according to the design calculation of tunnel jointing freezing program, i.e. routine design calculation method and three dimensional finite element method. The two methods are used for calculation of freezing reinforced program of eastern joint, and the result is compared and analyzed. The three-dimensional finite element method is also used for analysis of the earth body reinforced program in the butt joint area of western joint. In this way, the routine freezing wall design calculation method can be applicable to the simple design calculation of freezing wall thickness, and the three dimensional finite element method is much more applicable to the all-around analysis of stress and displacement of freezing wall so as to optimize the design.