Optimum analysis for the back-ward earth pressure has been studied, the best monitoring scheme of shield lining and the worst monitoring scheme of shield lining has also been acquired.
开展了管片工作土压力的反演最优解分析，得到了监测方案的最优布置方案和最差布置方案。
2
The parameterization design program for head-rest structure with the parameterization programming language PCL, and effects of headrest structure parameters on back-ward displacement are analyzed.