| 临江地下结构主被动联合抗浮方法及应用 |
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| 引用本文： | 骆冠勇,马铭骏,曹洪,潘泓.临江地下结构主被动联合抗浮方法及应用[J].岩土力学,2020,41(11):3730-3739. |
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| 作者姓名： | 骆冠勇 马铭骏 曹洪 潘泓 |
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| 作者单位： | 1. 华南理工大学 土木与交通学院，广东 广州 510640；2. 华南理工大学 亚热带建筑科学国家重点实验室，广东 广州 510640 |
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| 基金项目： | 国家自然科学基金项目（No. 51978282）；广东省自然科学基金项目（No. 2018A030313383，No. 2020A1515010583） |
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| 摘 要： | 临江场地的地下水位受外江水位影响，具有长期水位较低、短期汛期水位极高的特点。临江场地内的地下结构，若仅采用抗拔桩或抗拔锚杆等常规被动抗浮措施进行抗浮，将抗浮设防水位取为地表高程显然是偏危险的，但按50年一遇和100年一遇水位采用常规被动抗浮措施进行抗浮设计又显然是不经济的，成本极高。基于此，提出抗浮范畴临江结构的定义及其“排水廊道+常规抗浮措施”的主被动联合抗浮的方法。根据临江承压圆湖公式，考虑越流效应，给出了临江排水廊道简化计算分析方法并进行了有限元验证。临江地下结构利用排水廊道进行防洪渡汛，保证汛期地下结构水荷载稳定，消除汛期高水压对结构产生的极端水荷载，而对于平时非汛期水位的作用则利用常规抗浮措施进行考虑。廊道只在汛期高水位时起防洪渡汛作用，排水减压不会引起环境影响问题，同时其耐久性也容易保证。最后介绍利用此方法进行抗浮的实际工程。
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| 关 键 词： | 地下结构 地下水 抗浮 渗流 排水廊道 |
| 收稿时间： | 2020-05-06 |
| 修稿时间： | 2020-08-13 |
A new anti-float method for riverside underground structures: drainage corridor combined with uplift piles or uplift anchors |
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| LUO Guan-yong,MA Ming-jun,CAO Hong,PAN Hong.A new anti-float method for riverside underground structures: drainage corridor combined with uplift piles or uplift anchors[J].Rock and Soil Mechanics,2020,41(11):3730-3739. |
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| Authors: | LUO Guan-yong MA Ming-jun CAO Hong PAN Hong |
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| Institution: | 1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, Guangdong 510640, China;
2. The State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, Guangdong 510640, China |
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| Abstract: | The riverside groundwater level has a unique characteristic of low for long term working conditions but extremely high during flood seasons. This characteristic should be properly taken into account for designing a safe and economical anti-float scheme. For riverside underground structures, it will be dangerous when uplift piles or uplift anchors are adopted, taking the surface elevation as the anti-floating waterproof position. On the other hand, if uplift piles or uplift anchors are designed according to 50- or 100-years recurrence intervals, it is obviously uneconomical and the cost can be extremely high. Therefore, the definition of riverside underground structures and a new anti-float method on the combination of drainage corridors and uplift piles or anchors are proposed in this paper. Besides, considering the effect of leakage recharge, a simplified analytical approach of riverside drainage corridor based on circular pond formula is also put forward and verified by the finite element method. The drainage corridors are adopted to ensure the stability of water load on the underground structure and to eliminate the extreme water load caused by high water pressures during the flood season. In contrast, the conventional measures such as uplift anchors and piles will be adopted for anti-float during non-flood period. The drainage corridors only work during the flood season with high water levels, thus it will not cause environmental problems and its durability can also be easily guaranteed. In the end of this paper, an engineering application project adopting the proposed anti-float method is introduced. |
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| Keywords: | underground structures groundwater anti-float seepage drainage corridor |
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