四川西北地区砂卵石土的直剪试验研究

Study on Direct Shear Test of Sandy Pebble Soil in Sichuan Northwest Area

通过对大粒径砂卵石土进行直剪试验,研究分析了不同密实度、含水量和粒径大小对砂卵石土抗剪强度指标的影响。结果表明,砂卵石土的抗剪强度指标随着密实度的增大而增大,当增加到一定程度后趋于稳定;含水量对其影响甚微;随着粒径的增大,抗剪强度指标迅速提高。试验结果对四川西北地区砂卵石土的工程设计和施工具有参考价值。

Through direct shear test on large-granule sandy pebble soil,this paper analyzes the influence of different density,water content and granule size on sandy pebble soil shear strength.The result shows that shear strength indicator of sandy pebble soil increases with the increase of density and trends to be stable to a certain extent;water content has little influence on it;it rapidly increases with the increase of granule size.The test result has referential value for engineering design and construction of sandy pebble soil in Sichuan northwest area.