吹填砂场地强夯振动特性研究及安全评估

Vibration Characteristics of Dynamic Compaction and Safety Assessment in Hydraulic Fill Site

摘要:

针对曹妃甸工业园区液化天然气储罐地基加固过程中所引起的地面振动进行了深入研究，通过对现场强夯振动观测记录进行统计分析、频域分析以及规律拟合，给出了吹填砂场地上强夯所引起的地面振动衰减规律、振幅（振速）随夯击次数的变化规律以及强夯振动的主频变化规律，并就场地周围已存的海堤工程和天然气储罐工程进行了振动安全评估，为现场强夯施工参数的选取提供了理论支撑，同时也弥补了国内对于类似场地振动特性研究不足的局面。

Abstract:

The ground vibrationin in LNG storage tank foundation reinforcement of Caofeidian industrial zone is studied. By the statistical analysis, frequency domain analysis and the law fitting based on dynamic compaction vibration observation records in the field, the attenuation law of ground vibrationin caused by dynamic compaction, the variation of amplitude (vibration velocity) changing with the frequency of tamping and the main frequency variation of dynamic compaction are shown. The safety assessment of vibration is made on the existing seawall and gas tank projects around the field to provide theoretical support for the selection of dynamic compaction parameters, which also makes up the researches on the similar ground vibration characteristics in China.