[1]刘彦涛.下穿寺庙隧道爆破振动影响的数值模拟与分析[J].西安建筑科技大学学报(自然科学版),2021,(02):160-166.[doi:10.15986/j.1006-7930.2021.02.002]
 LIU Yantao.Numerical simulation and analysis of the influence of blasting vibration in the tunnel crossing under a temple[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2021,(02):160-166.[doi:10.15986/j.1006-7930.2021.02.002]
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下穿寺庙隧道爆破振动影响的数值模拟与分析()
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西安建筑科技大学学报(自然科学版)[ISSN:1006-7930/CN:61-1295/TU]

卷:
期数:
2021年02期
页码:
160-166
栏目:
出版日期:
2021-04-28

文章信息/Info

Title:
Numerical simulation and analysis of the influence of blasting vibration in the tunnel crossing under a temple
文章编号:
1006-7930(2021)02-0160-07
作者:
刘彦涛12
(1.中国铁建大桥工程局集团有限公司,天津 300300; 2.陕西省岩土与地下空间工程重点实验室,西安建筑科技大学,陕西 西安 710055)
Author(s):
LIU Yantao12
(1. China Railway Construction Bridge Engineering Bureau Group Co. Ltd, Tianjin 300300,China; 2.Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xi’an Univ. of Arch. & Tech.,Xi’an 710055, China)
关键词:
隧道工程 下穿施工 爆破控制 数值模拟 现场监测
Keywords:
tunnel engineering underground construction blast control numerical simulation: on-site monitoring
分类号:
U455.6
DOI:
10.15986/j.1006-7930.2021.02.002
文献标志码:
A
摘要:
合理的爆破设计方案是邻近既有建(构)筑物隧道钻爆施工振动危害控制的关键.新建商合杭铁路新大力寺隧道下穿既有寺庙,隧道下穿段爆破振动速度要求不大于2.0 cm/s; 针对新大力寺隧道下穿段钻爆施工特点,结合萨道夫斯基地震波衰减公式提出了台阶分区爆破方案; 通过数值模拟方法对拟定方案的振动影响进行评价,判断下穿段爆破方案的合理、可行性; 跟踪施工进行的爆破振动监测及与数值模拟结果的对比分析可知,模拟监测点振动时程曲线变化规律与实测振动影响规律基本一致,其振动波波峰和波谷出现的位置、时间和出现次数与实测情况相一致; 基于数值模拟分析推荐的台阶法分区爆破方案引起的邻近寺庙的振动速度实测值为1.95 cm/s,小于2.0 cm/s的控制标准.采用数值模拟方法在设计阶段能有效指导控制爆破方案的设计及评价,提高钻爆施工的效率,为隧道爆破施工方案确定提供了技术支持.
Abstract:
Reasonable blasting design plan is the key to control vibration hazard in tunnel drilling and blasting construction adjacent to existing buildings(structures). Aiming at the drilling and blasting construction characteristics of the Xindali Si large-section tunnel underneath the temple section of the Shanghehang Railway, a blasting plan for the upper steps, combined with the Sadowski seismic wave attenuation empirical formula, is proposed. The vibration impact of the proposed plan is evaluated by numerical simulation method, and the rationality and feasibility of the blasting plan of the under-crossing section are judged. Tracking the blasting vibration monitoring during construction and the comparative analysis with the numerical simulation results show that the vertical vibration velocity time history curve of the simulated monitoring point is basically consistent with the measured vibration influence law, and the location, time and appearance of the vibration wave crests and troughs. The frequency is consistent with the actual measurement; the measured value of the vibration velocity of the neighboring temple caused by the step method zone blasting scheme recommended by the numerical simulation analysis is 1.95 cm/s, which is less than the required 2.0 cm/s control standard, so the numerical simulation method used in the design stage can effectively guide the design and evaluation of the controlled blasting plan, reduce the number of blasting tests, improve the efficiency of drilling and blasting, and ensure the safe construction of the Xindalisi large-section tunnel underneath the temple and the safety of adjacent buildings. It is the technical support that was provided for tunnel blasting construction plan.

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(编辑 桂智刚)

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备注/Memo

备注/Memo:
收稿日期:2020-11-17 修改稿日期:2021-03-20
基金项目:陕西省创新能力支撑计划-创新团队项目(2020TD-005)
第一作者:刘彦涛(1972-),男,高级工程师,主要从事土木工程施工管理工作.E-mail:2357773202@qq.com
更新日期/Last Update: 2021-04-28