小直径异型锤强夯振动对周围建筑物的影响研究

Study on Influence of Dynamic Compaction with Small Diameter Abnormal Hammer on Adjacent Buildings

在分析小直径异型锤强夯产生振动波的机理和传播特点的基础上,结合强夯处理块碎石土工程实例,以最大合速度作为强夯振动对环境影响的评价指标,得到了速度随距离增大的衰减公式和用小直径异型锤强夯具体能级下的最小安全距离,并验证了隔振沟有效性。工程实例表明,采用小直径异型锤进行大能量级的强夯可以减小对周围环境的振动影响。

Based on the analysis of mechanism and spread characteristics of the vibration wave produced by small diameter abnormal hammer tamping,and with the example of the engineering of dynamic compaction on a rubble fill site,the velocity-distance equation is built and the minimum safety distance is defined during small diameter abnormal hammer tamping with the maximum resultant velocity as the evaluation index.And the validity of vibration isolation channel is verified.The practice engineering shows that the influence of the large energy level ramming with the small diameter abnormal hammer to adjacent building can be minished.