截排减压抗浮多井系统简化计算及设计方法

朱东风; 曹洪; 骆冠勇; 潘泓; 罗赤宇

doi:10.11779/CJGE202111004

截排减压抗浮多井系统简化计算及设计方法 English Version

朱东风^{1, 2,},
曹洪¹,
骆冠勇^1, ,,
潘泓¹,
罗赤宇²

1.
华南理工大学土木与交通学院,广东　广州　510640
2.
广东省建筑设计研究院有限公司,广东　广州　510010

基金项目:

国家自然科学基金面上项目 51978282

广东省自然科学基金项目 2018A030313383

广东省自然科学基金项目 2020A1515010583

详细信息

作者简介:
朱东风(1984— ),男,博士后,主要从事渗流及岩土工程方面的研究工作。E-mail：dongfengzhu@163.com

通讯作者:
骆冠勇, E-mail：luogy@scut.edu.cn

中图分类号: TU43
计量
- 文章访问数: 252
- HTML全文浏览量: 38
- PDF下载量: 100
出版历程
- 收稿日期: 2021-01-03
- 网络出版日期: 2022-12-01
- 刊出日期: 2021-10-31

Simplified calculation and design method of multi-well system for anti-uplifting based on intercepting and discharging water

1.
School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China
2.
Guangdong Architectural Design and Research Institute Co., Ltd., Guangzhou 510010, China

摘要

摘要: 对于截排减压抗浮系统中的减压井群（多井系统）,目前除采用数值法进行渗流分析外,尚无实用的简化计算方法,不利于推广使用。鉴于此,提出了简化计算方法：对于圆形止水帷幕内侧均匀分布的多井系统,假定止水帷幕内侧边界水头为常数,通过共形映射推导得到多井系统的水头分布；对于非圆形止水帷幕,可将其等效为圆形近似求解；采用阻力系数法,在考虑止水帷幕透水和绕渗的基础上,将止水帷幕内外侧渗流场串联起来,求解得到总流量。经算例验证,简化算法与有限元法相比结果差距较小,且仅需提供不多的几何参数,即可求得较精确的结果。在排水减压抗浮设计时,控制板底水头和井周水力坡降是关键,为兼顾安全性和经济性,需对参数n,r,h_w及r_w反复调整以达到最佳效果。
- 抗浮 /
- 渗流 /
- 多井系统 /
- 止水帷幕 /
- 共形映射
Abstract: For the multi-well system in the anti-uplifting system based on intercepting and discharging water, there is no practical simplified method except the numerical method for seepage analysis, which is not conducive to its application. In view of this, a simplified method is proposed. The idea is as follows: for the multi-well system with even distribution inside the circular cut-off wall, the hydraulic head on the inside boundary of the cut-off wall is assumed to be constant, and the distribution of the hydraulic head of the multi-well system is deduced through conformal mapping. For the non-circular cut-off wall, it can be equivalent to a circle to obtain an approximate solution.The resistance coefficient method is adopted to connect the inner and outer seepage fields of the cut-off wall in series on the basis of considering the water leakage and by-pass seepage of the cut-off wall, and the total flow can be obtained. After verification, a comparison with the finite element method shows that the difference between the simplified algorithm and the finite element method is smaller, and it only needs to provide a few geometric parameters to get more accurate results. The control of the hydraulic head at the bottom of the floor and the hydraulic slope around the well are the key points in the anti-uplifting design process based on drainage decompression. Moreover, in order to give consideration of both safety and economy, parameters n, r, h_w and r_w need to be adjusted repeatedly to achieve the best effect.
- anti-uplifting /
- seepage /
- multi-well system /
- cut-off wall /
- conformal mapping

HTML全文

图 1 止水帷幕内外侧渗流场

Figure 1. Seepage fields inside and outside cut-off wall

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图 2 z平面

Figure 2. z plane

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图 3 t平面

Figure 3. t plane

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图 4 ζ平面

Figure 4. ζ plane

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图 5 $ω$ $ω$ 平面

Figure 5. $ω$ $ω$ plane

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图 6 不同井数量n时OM₁的水头分布

Figure 6. Distribution hydraulic head of OM₁ with different numbers of wells

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图 7 止水帷幕渗流形态

Figure 7. Seepage patterns of cut-off wall

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图 8 水头计算结果比较（OM₁和OM₂）

Figure 8. Comparison of calculated results of hydraulic head

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图 9 截排减压抗浮设计流程

Figure 9. Anti-uplifting design process

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表 1 计算结果比较

Table 1 Comparison of calculated results

n	模型1								模型2
	Q/(m³·d^-1)		H_d/m		H_R/m(M₁)		H_R/m(M₂)		Q/(m³·d^-1)		H_d/m		H_R/m(M₁)		H_R/m(M₂)
	本文	有限元	本文	有限元	本文	有限元	本文	有限元	本文	有限元	本文	有限元	本文	有限元	本文	有限元
4	606	560	5.3	5.2	2.3	2.9	2.3	2.0	392	368	5.3	5.4	3.0	3.7	3.0	2.7
8	741	717	5.2	4.9	1.5	1.7	1.5	1.5	503	504	5.1	5.2	2.1	2.1	2.1	2.1
16	823	802	5.1	4.9	1.0	1.1	1.0	1.1	574	586	5	5	1.4	1.5	1.4	1.5
24	850	836	5.1	4.8	0.9	0.9	0.9	0.9	597	611	5	5	1.2	1.3	1.2	1.3
332	862	851	5.1	4.8	0.8	0.8	0.8	0.8	607	627	5	4.9	1.1	1.2	1.1	1.2

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