某山区地基强夯效果检测方法研究

Testing of Effect of Dynamic Compaction in a Mountain Area

强夯地基施工过程中,一般会采用多种检测方法验证强夯效果,但多种试验方法周期较长,如何快速判断出强夯效果,及时给出初步检测意见,成为现场检测工作中需要考虑的问题。根据某山区强夯地基检测前导试验项目分析,在现场采用标准贯入试验、地基土浅层平板载荷试验、多道瞬态面波测试等多种检测方法,对强夯地基承载力和密实程度进行评价,并通过对各试验区强夯前后的面波实验结果对比分析,结合标准贯入试验结果,得出素填土试验区剪切波速与土体密实程度关系,为后期大面积强夯施工提供依据。

During the dynamic compaction,multiple testing methods are used to verify the effectiveness of the ground improvement.However,the duration of some of the testing methods is long.How to quickly and effectively determine the effectiveness of dynamic compaction,to provide preliminary testing results in a timely manner,and to shorten the testing cycle have become a problem that needs to be resolved in on-site testing work.Based on the analysis of the reference test project for the dynamic compaction in a mountainous area,different detection methods such as standard penetration test,shallow plate load test on the treated soil,and multi-channel transient surface wave test were used on site to evaluate the bearing capacity and effectiveness of the dynamic compaction.And by comparing and analyzing the surface wave test results before and after dynamic compaction in each experimental area,combined with the standard penetration test results,the relationship between the shear wave velocity and soil compaction degrees in the plain fill experimental area is obtained,providing a good basis for the large-scale dynamic compaction construction in the later stage.