Upper-Bound Solution for the Stability Analysis of Layered Slopes

Zuo, Jinyu; Wang, B. T.; Li, W. W.; Zhang, H. X.

doi:10.1061/(asce)em.1943-7889.0002087

Cited by 9 publications

(3 citation statements)

References 25 publications

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“…Li and Wang (2007) presented a lower limit approach based on nonlinear programming for finite element plastic limit analysis of rocky slopes. Zuo and Wang (2022) used a polycentric approach to extend the rotation mechanism of laminated slopes and suggested an upper limit solution technique for laminated slope stability analysis. Duncan (1968) was the first to use the finite element approach to solve slope stability problems, ushering in a new age of finite element analysis for slope stability problems.…”

Section: Introductionmentioning

confidence: 99%

A Fast Prediction Method for Stability Safety and Reliability of Reservoir Bank Rock Slopes Based on Deformation Monitoring Data

Han

Chen²,

Jian³

et al. 2022

Front. Earth Sci.

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The stability of reservoir bank slopes is critical to the engineering operation’s safety. Due to the complexity of geological conditions, the monitoring mode based on deformation monitoring data cannot directly respond to the structural damage stability state, whereas anther mode based on structural calculation is time-consuming and lacks real-time capabilities. To that end, this paper proposes a method for fast prediction of the safety state of reservoir bank rock slope based on the physical significance of time-dependent deformation and rock creep at monitoring points, with the safety coefficient and reliability obtained by numerical calculation as the dependent variables and the slope deformation monitoring sequence as the independent variable, based on full verification of the rationality of numerical calculation. The model can be used to forecast the stability and reliability coefficients of reservoir bank slopes online using deformation data from the field. The application verification of the left bank slope of the Dagangshan arch dam reveals that the average and maximum error of slope stability safety coefficient prediction is within 5% for 90 and 180 days and the average and maximum error of reliability index prediction is within 10%, which meet the engineering requirements and can provide a new way for rapid prediction of slope engineering safety.

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Section: Introductionmentioning

confidence: 99%

A Fast Prediction Method for Stability Safety and Reliability of Reservoir Bank Rock Slopes Based on Deformation Monitoring Data

Han

Chen²,

Jian³

et al. 2022

Front. Earth Sci.

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“…Due to abundant rainfall in southeast Tibet, frequent periodic precipitation will make the soil unstable. On the other hand, the use of traditional curing agent will affect the Materials 2022, 15, 5609 2 of 16 ecosystem due to water circulation and the destruction of surface plants, thus reducing the stability of soil eroded by water [19][20][21][22][23][24][25]. Zhu et al [26] combined the addition of hydroxypropyl methylcellulose (HPMC) with MICP technology to improve the surface layer of the soil.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on PVA-MgO Composite Improvement of Sandy Soil

Zhao

Shi

et al. 2022

Materials

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Materials with violent hydration reaction such as cement are used to solidify sandy soil slopes, which will cause destructive damage to the ecology of the slopes. In this paper, polyvinyl alcohol (PVA) and activated magnesium oxide (MgO) are used to improve sandy soil, and the effects of the dosage and curing age of modifiers on the mechanical properties of solidified sandy soil are studied. The dry–wet durability of the composite improved sandy soil is analyzed using a dry–wet cycle test, and the improvement mechanism of PVA and activated magnesium oxide is revealed using an electron microscope. The results show that the curing effect of polyvinyl alcohol and activated magnesium oxide on sand particles is better than that of polyvinyl alcohol alone. The compressive strength of improved soil samples increases with the increase of curing time, and magnesium oxide as an improved material needs appropriate reaction conditions to give full play to its role. The compressive strength of composite improved samples increases first and then decreases during the dry–wet cycle. Through the observation of microstructure, it can be seen that the cementing material wraps and connects the sand particles, and the cementing material of the sample after the dry–wet cycle develops more completely; if the magnesium oxide content is high, cracks may appear inside the sample.

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“…Quality assessment is an important part of QC/QA procedures and runs through the entire QA process 8,9 . In slope reinforcement, the weak parts of DSM columns have adverse impacts on the reinforcement and even lead to the failure of structures [10][11][12] . Both the failure strength and uniformity of DSM columns are key points in their quality assessment [13][14][15] .…”

mentioning

confidence: 99%

Quality assessment and quality control of deep soil mixing columns based on a cement-content controlled method

Zuo

Wang

et al. 2023

Sci Rep

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This paper presents a cement-content controlled method for quality assessment and quality control of the deep soil mixing (DSM) columns in slope reinforcement. The ethylene diamine tetraacetic acid (EDTA) titration method was modified and used for the cement content measurement of core samples, and the effects of curing conditions and curing period on the titration results were investigated. 35 DSM columns with different construction parameters were installed in the test section, and cement content and unconfined compression tests of field core samples were conducted. The relationship between the unconfined compressive strength (UCS) and cement content of DSM columns was formulated, and the quality of DSM columns with different construction parameters was assessed. The test results suggested that the failure strength of the field cores was approximately 15–55% lower than that of laboratory samples with the same cement content. In single columns, the coefficient of variation (CV) of cement content had a negative correlation with the average failure strength and a positive correlation with the coefficient of variation of failure strength. Bidirectional mixing method, lower penetration and withdrawal velocity, more mixing blades and larger number of mixings could improve the uniformity of the DSM columns.

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Upper-Bound Solution for the Stability Analysis of Layered Slopes

Cited by 9 publications

References 25 publications

A Fast Prediction Method for Stability Safety and Reliability of Reservoir Bank Rock Slopes Based on Deformation Monitoring Data

A Fast Prediction Method for Stability Safety and Reliability of Reservoir Bank Rock Slopes Based on Deformation Monitoring Data

Experimental Study on PVA-MgO Composite Improvement of Sandy Soil

Quality assessment and quality control of deep soil mixing columns based on a cement-content controlled method

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