Orthogonal Numerical Test and Law Analysis of Vertical Earth Pressure on Buried Pipeline
In order to calculate the vertical earth pressure on pipelines more accurately,10 influencing factors were summarized.By altering structural parameters such as trench slope angle and trench width,different burial methods of pipelines were considered.A total of 50 orthogonal numerical test models were established,using 10 factors with 5 levels each.The correlation between vertical earth pressure on pipelines and various factors was evaluated through orthogonal numerical test,and the variation patterns of vertical earth pressure under the influence of highly significant factors were ob-tained through single factor analysis.The results showed that there were a total of 6 highly significant factors,listed in order of significance from greatest to least:the pipe-soil modulus ratio,Poisson′s ra-tio of backfill soil,trench slope angle,undisturbed soil elastic modulus,overlying soil height,and trench width.Among these,trench width and pipe-soil modulus ratio were positively correlated with the vertical earth pressure coefficient,while the overlying soil height,trench slope angle,undisturbed soil elastic modulus and Poisson′s ratio of backfill soil were negatively correlated with the vertical earth pressure coefficient.The study provides a basis for calculating the vertical earth pressure coeffi-cient and for pipeline deformation and stress analysis.
万方数据
维普
