河西走廊黄土湿陷性与物理力学特性

Collapsibility and physical and mechanical characteristics of loess in Gansu Corridor

河西走廊地区黄土分布不连续,且原生黄土少见,对其湿陷性评价重视度、准确性不够,公路、铁路这种线性工程,建成以后往往出现路基沉陷变形等病害。为了能够快捷有效地评价河西走廊黄土湿陷性及准确把握该区黄土物理力学性质,在统计分析的基础上,给出了河西走廊黄土物理力学特性一般分布特征;依据影响因子变异性分析和多元线性回归理论,给出了河西走廊地区黄土湿陷系数与黄土物性指标之间的相关性方程。本文成果在河西走廊地区黄土湿陷性评价和工程地质勘察、设计方面具有一定的参考价值。

Because of the discontinuous distribution of loess in Gansu Corridor and the distribution areas of the primary loess are smaller,the importance and accuracy of collapsibility evaluation for the loess are not enough. After the linear projects such as highway and railway engineering are completed,the roadbed subsidence and deformation often occur. In order to rapidly and effectively evaluate the collapsibility of the loess and accurately grasp the physical and mechanical properties of the loess in Gansu Corridor,on the basis of the statistical analysis, the general distribution characteristics of physical and mechanical properties of the loess in Gansu Corridor are given. Based on the analysis of the variability of the influencing factors and the linear regression theory,the correlation equations between the collapsibility coefficient of the loess and the physical property indexes of the loess in Gansu Corridor are given and some suggestions for eliminating collapsibility are put forward. The above study results have certain reference values in the evaluation of loess collapsibility and engineering geological investigation and design in Gansu Corridor area.