爆破减振模型在超大断面浅埋隧道中的应用研究  

Research on the Application of Blasting Damping Model in Shallow-Buried Tunnel with Super Large Section

作　　者：袁战会 YUAN Zhanhui(China Railway 20^(th)Bureau Group Co.Ltd.,Xi’an Shaanxi 710016,China)

机构地区：[1]中铁二十局集团有限公司,陕西西安710016

出　　处：《铁道建筑技术》2023年第2期50-53,82,共5页Railway Construction Technology

基　　金：陕西省自然科学基础研究计划项目(2022JQ-563);中国博士后科学基金项目(2020M673525)。

摘　　要：以重庆铁路枢纽东环线樵坪山隧道下穿既有居民区为背景,基于现场爆破振动监测技术,构建爆破减振模型,并对其开展数值模拟分析及工程应用研究。依据研究成果得出结论如下:应用爆破减振模型后,既有建筑物爆破振动峰值小于控制标准值,建筑物安全使用不受爆破振动引发的振速、加速度、位移等影响;采用本文减振方案,可将最大爆破振速控制在1.2 cm/s,且建筑物自振频率远低于爆破振动主频,爆炸能量可延时释放,有效实现了爆破振动的错峰传播,保证了隧道安全、高效施工。The existing residential area under the Qiaopingshan Tunnel on the East Ring Line of the Chongqing Railway Hub is the background of this study. A blasting and vibration absorption model was established based on the on-site blasting vibration monitoring technology, and numerical simulation analysis and engineering application were carried out. Based on the research results, it is concluded that after applying the blasting damping model, the peak value of blasting vibration of existing buildings is less than the control standard value. The safe use of buildings is not affected by vibration velocity, acceleration, displacement, etc. caused by blasting vibration. After using this damping scheme, the maximum blasting vibration rate of the building can be controlled at 1.2 cm/s. The self-resonance frequency of the building is much lower than the main frequency of blasting vibration. The explosion energy will be released in a delayed manner, and the blasting vibration will propagate at the wrong peak, which can ensure the safe and efficient construction of the tunnel.

关 键 词：浅埋超大断面隧道 减振模型 数值模拟 爆破控制 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]