雷振;孙鹏昌;卢文波;李福千;聂攀;陈明;
LEI Zhen;SUN Peng-chang;LU Wen-bo;LI Fu-qian;NIE Pan;CHEN Ming;Sinohydro Bureau 8 Co., Ltd.;State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University;

• 1:中国水利水电第八工程局有限公司
• 2:武汉大学水资源与水电工程科学国家重点实验室

摘要(Abstract)：

为了确定经济合理的爆破参数从而取得良好的沟槽开挖成型效果,依托深圳地铁12号线赤湾停车场开挖工程,开展了3类爆破方案共9次爆破试验。试验结果显示,预裂孔间距对沟槽两侧轮廓面成型效果起控制作用,预裂孔间距适当减小或设置导向孔,沟槽两侧轮廓面半孔率提高20%以上;预裂孔底部加强段药量大于1.2 kg和主爆孔超深适当增加至0.7 m以上均能有效改善底板超欠挖效果。在对比分析各次爆破试验效果的基础上,综合考虑施工成本和效率,优选了2种经济合理的爆破方案。沟槽开挖成型爆破参数优化的研究可为类似工程提供参考。
In order to obtain economical and feasible blasting parameters for ideal trench excavation shaping effects, 3 types of blasting schemes including a total of 9 blasting experiments were conducted in the Chiwan parking lot project of Shenzhen Metro Line 12. The results show that the shaping effects of the profiles on both sides of the trench are mainly controlled by the spacing between pre-split holes, and reducing the spacing between pre-split holes appropriately or setting guide holes can help increase the half-hole rate of the profiles on both sides of the trench by more than 20%. Furthermore, both arranging charge weight over 1.2 kg at the bottom of the pre-split holes and sub-drilling over 0.7 m of production blastholes are more favorable for obtaining expected trench excavation shaping effects. Based on analyzing the experiment effects and comprehensively considering construction efficiency and cost, 2 economical and feasible blasting schemes are finally selected. The research on optimization of blasting parameters for trench excavation shaping can provide reference for similar projects.

关键词(KeyWords)： 沟槽爆破;现场试验;成型效果;施工成本效率;参数优选
trench blasting;field experiment;excavation shaping effect;construction cost and efficiency;parameter optimization

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上资助项目(51779193);; 湖北省技术创新专项重大资助项目(2017ACA102)

作者(Authors): 雷振;孙鹏昌;卢文波;李福千;聂攀;陈明;
LEI Zhen;SUN Peng-chang;LU Wen-bo;LI Fu-qian;NIE Pan;CHEN Ming;Sinohydro Bureau 8 Co., Ltd.;State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University;

DOI: 10.19931/j.EB.20190235

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