1.Sichuan Chuanjiao road and Bridge Co. Ltd;2.Highway College, Chang'3.'4.an University;5.Hebei transportation planning, design and Research Institute
Application Foundation Project of Ministry of Transport, No.2015319812140; Sichuan Highway and Bridge Construction Group Co., LTD. Technology Development project (Entrusted), No.220221210155;
In order to explore the interaction and sensitivity of various factors affecting the frost heaving force of tunnel lining in seasonal freezing area, relying on cuiyunshan tunnel, an important control project on Yanchong expressway, which undertakes the transfer of personnel for the Winter Olympic Games, orthogonal tests were carried out on the influencing factors of frost heaving force such as frost heaving rate, freezing depth and lining elastic modulus by establishing ANSYS numerical model. The results show that: (1) when considering the influence of various factors on frost heaving force, only its main effect can be considered. (2) The sickness of melt circle, frost heaving rate, lining elastic modulus, frozen surrounding rock elastic modulus and unfrozen surrounding rock elastic modulus all have significant effects on frost heaving force. The sensitivity order of each factor is as follows: frozen rock elastic modulus > frost heaving rate > unfrozen rock elastic modulus > thickness of freeze-thaw circle > lining elastic modulus . (3) Compared with the original parameters, the frost heaving force of each part decreases by more than 30%, and the minimum decrease occurs in the vault, which is 34.20%. Based on this, the measures to control the frost heaving force are put forward, which provides guidance for the tunnel construction in the seasonal freezing area of Hebei Province.
罗燕平,马超,黎忠灏,等. 季冻区隧道冻胀力影响因素交互性及敏感性正交试验分析[J]. 科学技术与工程, , ():复制