摘要
对100 dam3储油罐地基处理特点、强夯地基处理机理、施工中常遇问题及相应的技术措施进行了介绍和总结。通过现场试夯和室内外试验确定设计方案,夯击能分别采用3.5 MJ和8.0 MJ,最佳夯击数分别为:第1,2遍11～13击;第3遍8～10击;满夯2击,最后2击平均下沉量不大于5 cm和10 cm,主夯点间距分别为7 m×7 m和9 m×9 m。强夯后,实验检测结果均满足设计要求:地基承载力不低于250 kPa,平均压缩模量不低于15 MPa,有效加固深度不小于12 m。罐体充水试验观测结果:沿罐壁圆周任意10 m弧度内的最大沉降差为11 mm,任意直径方向的最大沉降差24 mm,最大一点累积沉降量45 mm。
Here introduced are the characteristics of foundation preparation for 100 dam3 oil tank, dy- namic compaction mechanisms, problems in construction and associated technical measures to be taken. The design schemes were developed based upon trial compaction and indoor and outdoor tests. The compaction en- ergy was 3.5 MJ and 8.0 MJ. The optimized number of compactions was： 11 - 13 compactions for 1st and 2nd times, 8 - 10 compactions for 3rd time and 2 compactions for completion. The average settlement of last 2 compactions was greater than 5 cm and 10 cm. The spacing between main compaction points was 7 m × 7 m and 9 m× 9 m. After compaction, the test results show that all design requirements are met： the foundation＇ s load bearing capacity is no lower than 250 kPa, the average compression modulus is no lower than 15 MPa and minimum effective solidification depth is 12 m. The hydraulic test of tank filled with water indicates that： the maximum settlement difference in 10 m radian along the circumference of tank wall is 11 ram, the maximum radial settlement difference is 24 ram, and maximum accumulated settlement is 45 ram.
出处
《炼油技术与工程》
CAS
2013年第6期62-64,共3页
Petroleum Refinery Engineering
关键词
强夯
地基处理
地基承载力
基础沉降
dynamic compaction, foundation preparation, foundation bearing capacity, foundationsettlement
