中文摘要：

通过直剪试验,对添加EN-1后不同EN-1掺量、养护龄期、压实度和含水率的砒砂岩固化土的凝聚力和内摩擦角进行了测定。结果表明：在试验设计的EN-1掺量、养护龄期、压实度和含水率处理条件下,添加EN-1后,随EN-1掺量的增大和养护龄期的延长,砒砂岩固化土的抗剪强度较素土有不同程度的增大,当EN-1掺量为0.20%和养护龄期为30 d时,其抗剪强度最大。添加EN-1后,砒砂岩固化土的抗剪强度随压实度的增大和含水率的减小而增大。因此,在砒砂岩地区实际应用EN-1固土护坡时,为使EN-1固化土具有良好的抗剪强度并满足工程需要,建议EN-1掺量为0.20%,养护龄期在7-15 d之间,压实度大于95%,含水率略低于最优含水率为宜。

英文摘要：

The cohesion and internal friction angle under the different EN-1 contents,curing ages,compaction degrees and water contents treated with EN-1 were determined by using direct shear test.The results showed that the shear strength of Pisha sandstone solidified soil had varying degrees of increase than plain soil with the increase of EN-1 contents and curing ages under the EN-1 contents,curing ages,compaction degrees and water contents in this experiment after EN-1 were added.The shear strength of Pisha sandstone solidified soil was the biggest when EN-1 content was 0.20% and curing age was 30 d.The shear strength of Pisha sandstone solidified soil increased with the increase of compaction degree and the decrease of water content after EN-1 was added.Consequently,in order to make the EN-1 solidified soil have favorable shear strength and satisfy engineering demand,it suggested that EN-1 content was 0.20%,curing age was 7 - 15 d,compaction degree was greater than 95%,and water content was slightly less than optimum moisture content when EN-1 was used practically to solid and protect slope in Pisha sandstone region.