顶管爆破中地表质点振动的数值模拟研究  

NUMERICAL SIMULATION STUDY ON SURFACE MASS POINT VERTICAL VIBRATION VELOCITY IN PIPE JACKING BLASTING

作　　者：范志强[1] 蒋耀港[1] 沈兆武[1] 

机构地区：[1]中国科学技术大学近代力学系,合肥230027

出　　处：《工程爆破》2013年第1期1-4,39,共5页Engineering Blasting

基　　金：国家自然科学基金重点项目(51134012);国家自然科学基金面上项目(51174183)

摘　　要：为有效地预测地下顶管爆破所产生的爆破振动对地表结构的影响,基于ANSYS/LS-DYNA软件,采用分步数值模拟技术并结合实际装药对顶管爆破进行了数值模拟。在控制爆破振动速度为1.0cm/s的情况下,爆破振动危害影响范围为15m,并与现场实测结果进行了对比分析。数值模拟结果与现场所测数据较为吻合,可为同类顶管爆破方案设计中振动效应的控制和计算提供一种新的途径。In order to forecast the impact of the vibration effect induced by underground pipe jacking blasting on the surface structure effectively, a numerical simulation method by two steps combined with practical situation was proposed to simulate the pipe jacking blasting based on ANSYS/LS-DYNA software. The results showed that the damage influence scope of blasting vibration effect reached to 15 meters in condition of the 1.0cm/s vibration velocity. The numerical simulation and field test data are in good agreement, which provides a new way for the control and calculation of similar blasting vibration effect.

关 键 词：顶管爆破 振动效应 数值模拟 加载特性 

分 类 号：O382.2[理学—流体力学]