大规模挖填方地基强夯设计及现场试验分析

Analysis on Dynamic Compaction Design and Field Test of Large-scale Excavation and Filling Foundation

强夯法是山区工程地基加固经济有效的方法之一。为保障贵州山区某大规模削峰填谷场地平整工程建设质量,文章分别开展强夯置换和强夯加固施工参数设计及现场试验检测分析。在系统开展夯击能、夯锤尺寸、落距、夯点间距、夯击次数、最后两击夯沉量和间隔时间等施工参数设计的基础上,通过动力触探试验、地基静载试验、现场密实度等地基检测试验对夯击效果进行验证,确定该工程适用的施工参数,可为类似工程提供参考。

Dynamic compaction is one of the economical and effective methods for foundation reinforcement in mountainous projects.In order to ensure the construction quality of a large-scale peak cutting and valleyfilling site leveling project in Guizhou's mountainous area,this paper conducts the construction parameter design andfield test detection analysis of dynamic compaction replacement and dynamic compaction reinforcement.On the basis of systematically carrying out the design of construction parameters such as tamping energy,tamper size,drop distance,tamping point spacing,tamping times,final two tamping settlement and interval time,the tamping effect is verified by dynamic penetration test,foundation static load test,field compactness and other foundation detection tests,and the applicable construction parameters of the project are determined,which can provide reference for similar projects.