| 某基坑锚杆失效事故的原因分析 |
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| 引用本文： | 熊楚炎.某基坑锚杆失效事故的原因分析[J].探矿工程,2012,39(7):52-55. |
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| 作者姓名： | 熊楚炎 |
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| 作者单位： | 宁波市民用建筑设计研究院有限公司,浙江宁波315020 |
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| 摘 要： | 针对沿海软土地区一大型基坑中深达8.10 m的冷冻机房基础在基坑开挖过程中发生锚杆失效基坑坍塌事故,从挖土深度考虑不足、不良地质作用、锚杆施工间距超过设计要求、卸土放坡范围不足、锚杆抗拔承载力取值过高等5个方面进行了事故原因分析和模拟工况单元内力计算比较,指出了5大原因综合作用下增加的锚杆拉力设计值大大超过锚杆抗拔承载力而引发锚杆失效,基坑失稳破坏。
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| 关 键 词： | 锚杆失效 基坑事故 内力计算 锚杆拉力 锚杆抗拔承载力 |
| 收稿时间： | 2012/2/16 0:00:00 |
| 修稿时间： | 2012/5/27 0:00:00 |
Analysis on the Causes of Anchor Bolt Failure Accident in a Foundation Pit |
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| XIONG Chu-yan.Analysis on the Causes of Anchor Bolt Failure Accident in a Foundation Pit[J].Exploration Engineering(Drilling & Tunneling),2012,39(7):52-55. |
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| Authors: | XIONG Chu-yan |
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| Institution: | XIONG Chu-yan (Ningbo Civil Architec- tura! Design ＆ Research Co. , Ltd. , Ningbo Zhejiang 315020, China) |
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| Abstract: | In the process of the foundation pit excavation of a freezing room with 8.10 meters depth, which is in a large foundation pit in coastal soft soil area, collapse caused by anchor bolt failure occurred. By the analysis and calculation comparisons of simulation working conditions element internal force in 5 aspects ： insufficient consideration of digging depth, bad geological environment, bolt spacing exceeding the design requirements, insufficient range of step-slope by soil dumping and taking higher value of anchor pullout capacity, it was concluded that the increased anchor tension design value greatly exceeded the anchor anti-pulling force capacity by the comprehensive influence of above 5 aspects, which led the anchor bolt failure and the instability of foundation pit. |
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| Keywords: | anchor bolt failure foundation pit accident internal force calculation force of anchor bolt anti-pulling forcecapacity of anchor |
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