| 燃气泄漏爆炸作用下基坑动力响应分析 |
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| 引用本文： | 杨立功,夏伟,纪文栋,曲树盛,左殿军.燃气泄漏爆炸作用下基坑动力响应分析[J].西北地震学报,2020,42(4):989-995,1006. |
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| 作者姓名： | 杨立功 夏伟 纪文栋 曲树盛 左殿军 |
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| 作者单位： | 交通运输部天津水运工程科学研究院, 天津 300456;安徽省交通勘察设计院有限公司, 安徽 合肥 230011 |
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| 基金项目： | 交通运输部天津水运工程科学研究院科研创新基金（TKS180304） |
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| 摘 要： | 为研究燃气泄漏爆炸对基坑的影响,采用TNO多能法对燃气泄漏爆炸荷载进行计算,然后将爆炸冲击荷载作用于基坑周边一定范围内。首先假定不同开挖阶段燃气突然发生爆炸,然后通过ABAQUS有限元软件对不同开挖阶段下的爆炸进行数值模拟,研究不同开挖阶段燃气泄漏爆炸对基坑变形的影响。研究结果表明,每步开挖完后,爆炸荷载对基坑水平位移影响显著,而对坑内土体回弹量影响不明显。另外,每步开挖完最后一道支撑尚未安装的情况下,爆炸荷载对基坑支护结构的影响更为显著。
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| 关 键 词： | 基坑开挖 燃气泄漏 爆炸 |
| 收稿时间： | 2018/9/9 0:00:00 |
Dynamic Response of Foundation Pits Subjected to Explosion Induced by Gas Leakage |
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| YANG Ligong,XIA Wei,JI Wendong,QU Shusheng,ZUO Dianjun.Dynamic Response of Foundation Pits Subjected to Explosion Induced by Gas Leakage[J].Northwestern Seismological Journal,2020,42(4):989-995,1006. |
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| Authors: | YANG Ligong XIA Wei JI Wendong QU Shusheng ZUO Dianjun |
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| Institution: | Tianjin Research Institute for Water Transport Engineering, Ministry of Transport, Tianjin 300456, China;Anhui Traffic Survey and Design Institute Co. Ltd, Hefei 230011, Anhui, China |
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| Abstract: | To study the explosive effect induced by gas leakage on the foundation pit, the TNO multi-energy method is used to calculate the explosive load of gas leakage. The explosive impact load was then applied on a certain range around the foundation pit. First, assuming that a sudden explosion of fuel gas occurred at different excavation stages, the numerical model was then established to simulate the explosion at different excavation stages with the finite element software ABAQUS. The effect of the explosive load on the deformation of the foundation pit at different excavation stages was studied. Results showed that the effect of explosive load on the horizontal displacement of the foundation pit is significant, while the effect on the rebound of the soil in the pit is not clear. In addition, if the last prop is not installed after the excavation, the effect of explosive load on the supporting structure of the pit will be more significant. |
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| Keywords: | excavation of foundation pit gas leakage explosion |
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