爆破器材2026，Vol.55Issue(3)：58-64,7.DOI:10.3969/j.issn.1001-8352.2026.03.009
钢筋混凝土支撑梁闷爆技术的应用
Application of Confined Blasting Technology for Reinforced Concrete Support Beams
李秋铭 1张杨 2万学刚1
作者信息
- 1. 国家矿山安全监察局湖南局安全培训中心(湖南 长沙,410000)
- 2. 国家矿山安全监察局湖南局安全培训中心(湖南 长沙,410000)||湖南安全技术职业学院(湖南 长沙,410000)
- 折叠
摘要
Abstract
Conventional demolition methods for reinforced concrete support beams in urban deep foundation pit en-gineering often face challenges such as difficult control of flyrocks and vibration,significant impact of dust and noise.A safe,efficient,and environmentally friendly confined blasting technique was proposed.Support segments that obstruct the construction of the main basement structure are pre-demolished.After the basement structure is completed and reaches the design strength,the basement structure is used as an enclosed protective system to implement millisecond-delay controlled blasting on the remaining internal supports.Parameter design was refined,with an explosive consumption of 1 000-1 300 g/m3.In the joint delay network inside and outside the hole,the single hole charge is 200-400 g,and the maximum single charge is no more than 2 000 g.Blast-induced adverse effects are systematically controlled.Engineering applications de-monstrate that,in confined blasting technology,blasting flyrocks and dust are completely confined inside the basement structure,and external noise is significantly reduced.Measured peak vibration velocity during blasting is 0.225 cm/s.The concrete and rebar cage are completely separated.It provides a scalable and innovative solution for the demolition of deep foundation pit supports in complex environments.关键词
深基坑/支撑梁/拆除爆破/支撑梁闷爆/工程爆破Key words
deep foundation pit/support beam/demolition blasting/confined blasting of support beam/engineering blasting分类
建筑与水利引用本文复制引用
李秋铭,张杨,万学刚..钢筋混凝土支撑梁闷爆技术的应用[J].爆破器材,2026,55(3):58-64,7.
