密实黏土的重塑与特性分析

Remolding of compacted clay and characteristic analysis

在实际工程中,会遇到不同的疏浚土质和各种影响疏浚效率的土质,疏浚工程相关问题的解决都离不开对原状岩土特性的研究。针对国内外对各种疏浚土的重塑技术少有先例可循,阻碍了相关问题的研究。本文进行了密实黏土的重塑工艺研究和重塑土性能分析,并采用冲击夯实法进行密实处理,得到与天然状态密实黏土特性相拟合的重塑方法。结果显示:通过对土体的改良,使用冲击夯实法可实现不同塑性指数、密实程度和标贯击数的黏土重塑;并得到土体含水率和液性指数对密实度和标贯击数的影响趋势,为研究黏土的重塑技术提供借鉴和参考。

In practical engineering, different dredging soil quality and various soil quality that affect dredging efficiency will be encountered. The solution of dredging engineering-related problems cannot be separated from the study of the original rock and soil characteristics. The remolding of all kinds of dredging soil technology at home and abroad for rare precedent, hindered the research of dredging engineering issues. This article carries on the technology research of remodeling compacted clay and the properties analysis of compacted clay. Impact compaction method is adopted to improve the compaction, geting a method which can fit natural characteristics well. The results reveal that: through the improvement of soil, the impact compaction method can realize the clay remolding with different plasticity index, compactness degree and standard penetration strike number. The influence trend of soil moisture content and liquid index on compactness and penetration strike number is obtained, which can provide a reference for clay remolding technology.