Stability Correction Calculation of New Debris Flow Grille Dam Considering Permeation

IF 2 4区工程技术 Q3 ENGINEERING, GEOLOGICAL

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2022-06-06 DOI:10.1680/jgeen.21.00219

Yongsheng Wang, Xiaobin Zhang, Bin Wang, Jianshe Liu

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Abstract

In current studies, when calculating the stability of a permeable dam under half-full or full reservoir conditions, seepage force has not been considered. Based on the stability calculation equation of a new debris flow grille dam structure, combined with the accumulation seepage model and the Bernoulli principle, the simplified expression of seepage force was derived, and its effect on the dam body was found to be equivalent to the overturning moment; thus, the original calculation equation was corrected. The effect of changing the internal friction angle on the stability was analyzed, making the corrected equation universal and applicable. The verification results showed that the overturning stability coefficient of the blocking dam was positively correlated with the internal friction angle. Compared to the original calculation equation, the anti-overturning stability coefficient of the blocking dam was reduced by about 44.5% on average after considering the seepage force; the attenuation amplitude increased with the increase of the friction angle in the accumulation, which was closer to the actual stress situation.

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考虑渗透的新型泥石流格栅坝稳定性修正计算

在目前的研究中，在计算半满或满库条件下透水大坝的稳定性时，没有考虑渗流力。基于一种新型泥石流格栅坝结构的稳定性计算方程，结合堆积渗流模型和伯努利原理，导出了渗流力的简化表达式，发现其对坝体的影响等效于倾覆力矩;从而对原来的计算方程进行了修正。分析了改变内摩擦角对稳定性的影响，使修正方程具有通用性。验证结果表明，坝体倾覆稳定系数与内摩擦角呈正相关。与原计算方程相比，考虑渗流力后坝体抗倾覆稳定系数平均降低约44.5%;随着堆积中摩擦角的增大，衰减幅度增大，更接近实际应力情况。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering 工程技术-地球科学综合

CiteScore

4.40

自引率

4.50%

发文量

审稿时长

3 months

期刊介绍： Geotechnical Engineering provides a forum for the publication of high quality, topical and relevant technical papers covering all aspects of geotechnical research, design, construction and performance. The journal aims to be of interest to those civil, structural or geotechnical engineering practitioners wishing to develop a greater understanding of the influence of geotechnics on the built environment.