摘要
采用改装击实仪对赣南地区红砂岩土进行室内单点冲击试验,自制小环刀测量不同方案下红砂岩土的密度,电子万能试验机测试静压力作用下的压缩位移.试验研究表明,静压作用后单位体积土体的能量消耗值与其密度符合y=Ae-xt+y0关系;冲击荷载作用下,土体的粒径范围决定其竖直方向的密度变化幅度,粒径范围越大,级配越好,出现密度急剧减小的深度越浅;水平方向密度变化幅度均匀;冲击作用在土体表面形成的硬壳层阻碍了能量的传递,使能量消耗以竖向为主.研究成果对于强夯法处理地基的方案选择具有指导意义.
The indoor single-point impact test was done on red sandstone soil of southern Jiangxi by using the compaction test equipment which is refitted. Homemade cutting ring was used to collect soil to test the density changes of red sandstone soil under different solution, and the compression displacement was tested under the action of static pressure with electronic universal testing machine. Test results show that the relationship between energy consumption value of the soil and its density is y=Ae--7-＋yo after the static pressure; the particle size range of the soil determines variations in the density of the vertical direction, the larger the range, the greater the grading. Its density decreases sharply when depth is shallower under impact load; the amplitude of horizontal density variations is uniform; because the hard crust which informed on the soil surface hindered the energy transfer, the energy consumption is given priority to vertical. The research results have guiding significance for scheme selection on dynamic compaction method of dealing with the foundation.
出处
《江西理工大学学报》
CAS
2016年第1期21-25,共5页
Journal of Jiangxi University of Science and Technology
基金
国家自然科学基金资助项目(50869002)
江西省教育厅资助项目(GJJ08290)
关键词
红砂岩土
冲击荷载
密度
能量消耗
red sandstone soil
impaction load
density
energy consumption
