挤淤爆破规律及其振动效应研究

发布时间：2018-04-28 06:36

本文选题：爆炸力学 + 挤淤爆破　；参考：《爆破》2017年03期

【摘要】：为了研究挤淤爆破规律以及爆破地震波的传播特性,结合连云港连云新城示范区填海造地及基础设施建设项目的挤淤爆破工程实例,对挤淤爆破的全过程进行高速摄影录像和爆破地震波监测与分析。高速摄影再现了挤淤爆破过程中"水—淤泥—围堰"系统相互作用的运动过程,有效解释了挤淤爆破过程中预埋石料与淤泥置换的作用机理。利用实测的爆破地震波数据修正与地形地质条件有关的系数K和衰减系数α,获得了适于挤淤爆破过程中计算质点振动速度随距离衰减的Sadovsk计算公式,为有效预测类似工程中爆破地震波的传播规律特征提供了一种方法参考。挤淤爆破过程中测得的爆破地震波主振频率范围在8~50 Hz之内,说明淤泥介质对爆破地震波不同频率成分的传播具有选择性:高频地震波通过淤泥时产生大幅度的衰减,低频地震波通过淤泥后对建(构)筑物造成破坏。
[Abstract]:In order to study the rule of silting blasting and the propagation characteristics of blasting seismic wave, combined with the example of silt blasting in Lianyungang Lianyun Xincheng demonstration area, The whole process of silting blasting is monitored and analyzed by high-speed photographic video recording and blasting seismic wave. The motion process of the interaction between "water-silt-silt-cofferdam" system during silting blasting is reproduced by high-speed photography, and the action mechanism of pre-buried stone and silt replacement during silting blasting is effectively explained. Using the measured blasting seismic wave data to correct the coefficient K and attenuation coefficient 伪 related to the topographic and geological conditions, the Sadovsk formula suitable for calculating the attenuation of particle vibration velocity with distance in the process of silting blasting is obtained. It provides a method reference for predicting the propagation characteristics of blasting seismic waves in similar projects. The main vibration frequency range of blasting seismic wave measured during silting blasting is less than 850 Hz, which indicates that silt medium has selectivity to the propagation of different frequency components of blasting seismic wave: high frequency seismic wave has a large attenuation when it passes through silt. Low frequency seismic waves through the silt cause damage to the building.
【作者单位】：解放军理工大学野战工程学院;
【基金】：国家自然科学基金项目(51304218、51508569) 江苏省自然科学基金面上项目(BK20151449)
【分类号】：U655.52

【相似文献】