Arc-plane failure mode and support design method of dual-element slope of soil and strongly weathered rock

doi:10.11835/j.issn.1000-582X.2021.057

Home > Archive>Volume 47, Issue 2, 2024 >1-13. DOI:10.11835/j.issn.1000-582X.2021.057

Arc-plane failure mode and support design method of dual-element slope of soil and strongly weathered rock
DOI:
                        10.11835/j.issn.1000-582X.2021.057
                    
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                        [cstr]
                    
Author:
                        LI Lianxiang1,2LI Lianxiang
1a.Foundation Pit and Deep Foundation Engineering Research Center, Jinan 250061, P. R. China;1b.School of Civil Engineering, Shandong University, Jinan 250061, P. R. China, Jinan 250061, P. R. China
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JIA Bin1,2JIA Bin
1a.Foundation Pit and Deep Foundation Engineering Research Center, Jinan 250061, P. R. China;1b.School of Civil Engineering, Shandong University, Jinan 250061, P. R. China, Jinan 250061, P. R. China
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ZHAO Zhongyang3ZHAO Zhongyang
2.First Construction Co., Ltd., China Construction Eighth Bureau, Jinan 250014, P. R. China
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HAN Zhixiao1,2HAN Zhixiao
1a.Foundation Pit and Deep Foundation Engineering Research Center, Jinan 250061, P. R. China;1b.School of Civil Engineering, Shandong University, Jinan 250061, P. R. China, Jinan 250061, P. R. China
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LI Shengqun1,2LI Shengqun
1a.Foundation Pit and Deep Foundation Engineering Research Center, Jinan 250061, P. R. China;1b.School of Civil Engineering, Shandong University, Jinan 250061, P. R. China, Jinan 250061, P. R. China
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Affiliation:1.1a.Foundation Pit and Deep Foundation Engineering Research Center, Jinan 250061, P. R. China;2.1b.School of Civil Engineering, Shandong University, Jinan 250061, P. R. China, Jinan 250061, P. R. China;3.2.First Construction Co., Ltd., China Construction Eighth Bureau, Jinan 250014, P. R. China
Clc Number:U416.1+4
Fund Project:Supported by National Natural Science Foundation of China(51508310)， and the Shandong Provincial Excellent Young and Middle aged Scientists Research Fund(BS2013SF024).

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Abstract:

To investigate the non-destructive critical slope rate and stability assessment method for strongly weathered rock slopes with soil and highly weathered rock, based on Jinan's strata, suitable soil layer parameters for numerical simulation are determined. The strength reduction method is then applied to calculate the critical slope rate of the slope, providing reference for construction. The analytical solution for the slope's safety factor is obtained using the improved Swedish slice method and the slip line field method. These analytical solutions provide essential prerequisties for safety factor applications. Results show that strongly weathered rock experiences failure when the rock strata thickness exceeds half of the slope height or the slope ratio surpasses 1:0.5. The obtained safety factor from the analytical solution tends to be conservative, contributing to enhanced engineering safety. For soil and strongly weathered rock slope, the research findings help identify the failure area, facilitating the design of support schemes.

Key words:slope stability;hazard index;soil rock double slope;Swedish division;slip line field method;analytical solution

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李连祥,贾斌,赵忠杨,韩志霄,李胜群.土与强风化岩双元边坡圆弧-平面破坏模式与支护设计方法[J].重庆大学学报,2024,47(2):1~13

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Received:June 02,2021
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Online: February 20,2024
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