Geomechanics and Geoengineering-An International Journal最新文献_第9页

Finite element analysis of a slope stability by incrementally increasing the mobilised principal stress deviator 逐渐增加主应力偏差的边坡稳定性有限元分析

IF 1.3

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-08-10 DOI: 10.1080/17486025.2021.1955157

Djillali Amar Bouzid

{"title":"Finite element analysis of a slope stability by incrementally increasing the mobilised principal stress deviator","authors":"Djillali Amar Bouzid","doi":"10.1080/17486025.2021.1955157","DOIUrl":"https://doi.org/10.1080/17486025.2021.1955157","url":null,"abstract":"ABSTRACT The assessment of slope stability factor by a FE analysis using the shear strength reduction method (SRM) enjoys several advantages and owns many shortcomings. As an alternative, a new FE approach called stress deviator increasing method (SDIM) is proposed. By means of a factor termed Mohr’s circle expansion factor, the new approach assesses the slope stability by incrementally increasing the mobilised principal stress deviator until the soil failure is reached. The numerical procedure is based then on a rigorous formulation as it preserves the definition of the safety factor consistent with that of LEM and maintains the progressive development of the shear stress on same plane on which the shear strength will occur at failure. The proposed method deals with the actual material by using the real strength parameters and rather than those reduced by a factor. The results of SDIM encoded in a computer code called were thoroughly assessed against those of both SRM and LEM using several slope examples involving and purely cohesive soils. Results of comparison encompassing factor of safety along with plastic strain distributions showed the reliability and the strength of the present method.","PeriodicalId":46470,"journal":{"name":"Geomechanics and Geoengineering-An International Journal","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41493952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance and benefits of tire rubber as substitute aggregates in the construction of concrete dams 轮胎橡胶在混凝土坝施工中作为替代骨料的性能和效益

IF 1.3

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-08-09 DOI: 10.1080/17486025.2021.1955153

H. Haidar, H. Hamze, Mohammad Ezzedine, A. Barada, J. Halwani, A. Mechaymech

引用次数: 0

A comparative study between strength and durability of bentonite and natural gum stabilised sand 膨润土与天然胶砂强度和耐久性的比较研究

IF 1.3

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-08-04 DOI: 10.1080/17486025.2021.1961026

S. Alam, Assefa Weldu Gebremedhin, Hika Wachila Atomsa, Afzal Husain Khan

{"title":"A comparative study between strength and durability of bentonite and natural gum stabilised sand","authors":"S. Alam, Assefa Weldu Gebremedhin, Hika Wachila Atomsa, Afzal Husain Khan","doi":"10.1080/17486025.2021.1961026","DOIUrl":"https://doi.org/10.1080/17486025.2021.1961026","url":null,"abstract":"ABSTRACT The loss in strength of engineered geo-materials due to their exposure to adverse environmental conditions is a major problem and is investigated in terms of durability. In the present study, geo-materials are developed using the sand obtained from river Yamuna and is stabilised with bentonite or two different types of biopolymer (Guar gum and Xanthan gum) separately. The maximum percentage of bentonite is fixed as 25% by dry weight, whereas the biopolymer (0.5%, 1.0%, 1.5%, and 2.0%) is used by making its solution with distilled water. A continuous increase in the unconfined compressive strength is observed in the bentonite stabilised sand whereas an optimum percentage of both the biopolymers is observed as 1.5%. The penetration resistance is presented in term of CBR value and resilient modulus is calculated using the same. Although, the bentonite and Guar gum stabilised sand demonstrate higher strength compared to Xanthan gum stabilised sand; however, the former is not found stable when submerged in water. More than 50% loss in strength for sand stabilised with 1.5% and 2.0% Xanthan gum is observed. Further, the stability of the biopolymer stabilised sand in submerged condition is discussed with the help of SEM images.","PeriodicalId":46470,"journal":{"name":"Geomechanics and Geoengineering-An International Journal","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46214627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Hybrid roof standing supports in underground mining: concept and behaviour 地下开采中混合顶板支撑:概念和行为

IF 1.3

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-08-03 DOI: 10.1080/17486025.2021.1961025

Hongchao Zhao, Ting-Ting Ren, A. Remennikov

{"title":"Hybrid roof standing supports in underground mining: concept and behaviour","authors":"Hongchao Zhao, Ting-Ting Ren, A. Remennikov","doi":"10.1080/17486025.2021.1961025","DOIUrl":"https://doi.org/10.1080/17486025.2021.1961025","url":null,"abstract":"ABSTRACT This paper presents a series of novel hybrid columns incorporating emerging materials, being the alternative to pumpable standing supports used in underground mines. The infill material of these hybrid columns is the cementitious grout material while the exterior containers are either made of polyvinyl chloride (PVC), fibre-reinforced polymer (FRP) composite, geogrid or the combination of each two materials. To investigate the mechanical response of these columns under the uniaxial compression loading, the systematic laboratory tests covering eight large-scale tubular columns were conducted and the test results showed that: (1) the strain constant behaviour of PVC-confined cementitious grout (PCC) column is mainly attributed to the relatively low confinement after the yielding of the PVC tube; (2) the high strength-to-weight ratio and linear tensile behaviour of FRP leads to the stress-hardening behaviour of FRP-confined cementitious grout (FCC) column and the enhanced compressive behaviour of FCC is mainly related to FRP thickness; (3) both the FRP-PVC confined cementitious grout (FPCC) columns and FRP-geogrid confined cementitious grout (FGCC) columns exhibited the superior compressive behaviour either in terms of the large axial deformation or the load carrying capacity, compared with the unconfined cementitious grout material (UCM) under uniaxial compression loading.","PeriodicalId":46470,"journal":{"name":"Geomechanics and Geoengineering-An International Journal","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46389509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Passive resistance of unsaturated backfill under steady state flow conditions 稳态流动条件下非饱和充填体的被动阻力

IF 1.3

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-08-03 DOI: 10.1080/17486025.2021.1955163

R. Ganesh, J. Sahoo, S. Rajesh

引用次数: 3

Application of the HF, DRA and DCDA technologies for in situ stress determination in Iron Quadrangle rock masses HF、DRA和DCDA技术在铁四边形岩体地应力测定中的应用

IF 1.3

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-08-02 DOI: 10.1080/17486025.2021.1955162

Henrique de Andrade Penido, A. Funato, H. Metsugi, V. F. Navarro Torres, Juan Manuel Girao Sotomayor, Phillip Dight, Rodrigo Peluci de Figueiredo, André Pacheco de Assis, A. Guimarães

{"title":"Application of the HF, DRA and DCDA technologies for in situ stress determination in Iron Quadrangle rock masses","authors":"Henrique de Andrade Penido, A. Funato, H. Metsugi, V. F. Navarro Torres, Juan Manuel Girao Sotomayor, Phillip Dight, Rodrigo Peluci de Figueiredo, André Pacheco de Assis, A. Guimarães","doi":"10.1080/17486025.2021.1955162","DOIUrl":"https://doi.org/10.1080/17486025.2021.1955162","url":null,"abstract":"ABSTRACT This study presents an unprecedented campaign of measurements (magnitudes and orientations) of the in situ stresses in itabirite rocks of the Brazilian Iron Quadrangle region using the hydraulic fracturing (HF), deformation rate analysis (DRA) and diametrical core deformation analysis (DCDA) methods. The previous studies of this rock mass consider estimated values of k, and the practice of using in situ stress tests to support geotechnical analyses of the rock mass of this region has not been adopted. The study site is located at a depth of up to 400 m around a pit. The rock mass under study shows the presence of different geological structures, which made performing the tests difficult. The DRA results show a marked difference compared to the HF and DCDA results; the horizontal stresses were greater than the vertical stresses, which is a finding that may occur due to local geodynamic influences. The results contribute to the understanding of the strains and stresses induced by mining activities in the Brazilian Iron Quadrangle. For a better determination of the regional in situ stresses in the rock mass of the Brazilian Iron Quadrangle, new HF tests, as well as hydraulic testing of pre-existing fractures are recommended.","PeriodicalId":46470,"journal":{"name":"Geomechanics and Geoengineering-An International Journal","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17486025.2021.1955162","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43396507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Response surface methodology: a tool to optimise the contents of lime and polyethylene terephthalate (PET) fiber for stabilising a residual soil 响应面法：一种优化石灰和聚对苯二甲酸乙二醇酯（PET）纤维含量以稳定残留土壤的工具

IF 1.3

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-07-26 DOI: 10.1080/17486025.2021.1955155

Endene Emmanuel, Lee Li Yong, Nicholas Fogne Appiah, S. Gawu

{"title":"Response surface methodology: a tool to optimise the contents of lime and polyethylene terephthalate (PET) fiber for stabilising a residual soil","authors":"Endene Emmanuel, Lee Li Yong, Nicholas Fogne Appiah, S. Gawu","doi":"10.1080/17486025.2021.1955155","DOIUrl":"https://doi.org/10.1080/17486025.2021.1955155","url":null,"abstract":"ABSTRACT The possibility of stabilising a residual soil using lime and polyethylene terephthalate (PET) fibre by employing the central composite design technique in response surface methodology and using the desirability function to identify optimum additive combinations for the improvement in the strength properties of the treated soil was explored in this study. The effects of the independent variables (lime content, PET content, and curing duration) on the responses [unconfined compressive strength (UCS) and flexural strength (FS)] were investigated by analysis of variance (ANOVA). The results indicate that the developed mathematical models are statistically significant (p ≤ 0.05) through the analysis of variance, thus they are applicable for the optimisation process. Predicted values from the developed models were found to be in good agreement with their experimental counterparts. The optimum conditions were found to be 9% lime content, 1.9% PET fibre content, and 30 days curing duration, with a designated maximum desirability function (D = 0.996). Microstructural investigations revealed that the formation of calcium-aluminate-hydrate and calcium-silicate-hydrate were the key components liable for the improvement in the strength properties of the treated soil. The reported findings engaged the concurrent application of lime and PET fibre to improve the strength properties of residual soils.","PeriodicalId":46470,"journal":{"name":"Geomechanics and Geoengineering-An International Journal","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17486025.2021.1955155","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41932335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Temperature induced changes in the behaviour of cementing fine-grained soils under dynamic loadings 动态荷载作用下温度对胶结细粒土性能的影响

IF 1.3

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-07-21 DOI: 10.1080/17486025.2021.1955158

Imad Alainachi, M. Fall

{"title":"Temperature induced changes in the behaviour of cementing fine-grained soils under dynamic loadings","authors":"Imad Alainachi, M. Fall","doi":"10.1080/17486025.2021.1955158","DOIUrl":"https://doi.org/10.1080/17486025.2021.1955158","url":null,"abstract":"ABSTRACT Cemented paste backfill (CPB) has been extensively used in the mine industry to backfill underground mine cavities for ground support and/or tailings management. Once placed in mine underground cavities, the geotechnical and liquefaction response of the CPB under dynamic (cyclic) loadings is a key design concern in mine backfilling. Moreover, fresh CPB might be exposed to several sources of heat that might affect its cyclic behaviour and liquefaction potential. This manuscript presents findings of assessing the effect of backfill temperature on its geotechnical and liquefaction response to cyclic loading by using shaking table. CPB mixtures were prepared under different temperatures, poured into a flexible laminar shear box, cured (under the same mixing temperature) for 2.5 hours, and then exposed to cyclic loading using 1-D Shaking table. Obtained results illustrate that CPB prepared and cured under the temperature of 20°C can be prone to liquefaction under the studied loading conditions. However, CPB prepared and cured below a temperature of 35°C is resistant to liquefaction. These results provide better comprehension of the effect of backfill temperature on the cyclic behaviour of CPB, and thus assist in designing more efficient CPB structures.","PeriodicalId":46470,"journal":{"name":"Geomechanics and Geoengineering-An International Journal","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17486025.2021.1955158","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44280259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Preliminary experimental investigation on the inundating-induced collapse in collapsible soils improved by encased sand column 包砂柱改良湿陷性土淹没塌陷的初步试验研究

IF 1.3

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-07-21 DOI: 10.1080/17486025.2021.1955154

Ahmed Mohammed Hasan, S. Abdulhamid, H. Ibrahim

{"title":"Preliminary experimental investigation on the inundating-induced collapse in collapsible soils improved by encased sand column","authors":"Ahmed Mohammed Hasan, S. Abdulhamid, H. Ibrahim","doi":"10.1080/17486025.2021.1955154","DOIUrl":"https://doi.org/10.1080/17486025.2021.1955154","url":null,"abstract":"ABSTRACT The present research aims to explore experimentally the performance and modes of failure of the wetting-induced collapse of fully penetrating reinforced and unreinforced models of a short single sand column in a collapsible soil subjected to partial inundation through a series of model tests under high constant total stress of more than 200 kPa. A specific loading frame and a test container were designed to apply vertical pressure and measure vertical movements of the columns . The experimental test results demonstrated that providing only sand columns in collapsing soil have no significant contribution in reducing the large volume change and sudden collapse when wet. In contrast, geosynthetic-encased columns prevented the occurrence of wetting-induced collapse and highly reduced the sudden vertical movements to a gradual process under relatively high applied pressure. Additionally, a slight change in the dry density of the soil had a dramatic influence on the behaviour of the wetting-induced collapse and modes of failure. In this study, the experimental test results and theoretical results from different analytical approaches in the literature have confirmed that it is practically possible to apply high total stress of more than 300 kPa on a single footing on collapsible soils subjected to wetting condition.","PeriodicalId":46470,"journal":{"name":"Geomechanics and Geoengineering-An International Journal","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17486025.2021.1955154","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49252728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Fault and fracture reactivation analysis by 4D geomechanical integrated modelling in one of a depleted carbonate oil field, southwest of Iran 伊朗西南部一个枯竭碳酸盐岩油田的断层和裂缝再活化4D地质力学综合建模分析

IF 1.3

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-07-21 DOI: 10.1080/17486025.2021.1955156

M. Tadayoni, Mahmoudreza Khalilbeyg, Radzuan Bin Junin

{"title":"Fault and fracture reactivation analysis by 4D geomechanical integrated modelling in one of a depleted carbonate oil field, southwest of Iran","authors":"M. Tadayoni, Mahmoudreza Khalilbeyg, Radzuan Bin Junin","doi":"10.1080/17486025.2021.1955156","DOIUrl":"https://doi.org/10.1080/17486025.2021.1955156","url":null,"abstract":"ABSTRACT The study field has been an oil-producing area in southern Iran for nearly 50 years. Complex geological structure and varying levels of depletion scenarios require geomechanical analysis of the reservoir to enhance its production and mitigate geomechanical risks. This paper describes creating a time-lapse (4D) integrated geomechanical model by generating 3D maps of mechanical properties and a 3D stress state that can be altered over time as pore pressure changes, then explores pressure depletion and related stress changes effects on faults and fractures reactivation. The first phase of the study was an integrated stress analysis using Image logs and sonic anisotropy interpretation. 1D–3D Mechanical Earth Model was built by gridding the reservoir and populate the model with mechanical properties. The third phase provided a distribution of stresses and associated strains under initial conditions using finite element calculations. Ultimately, stress and strain changes associated with depletion simulated by the reservoir flow model were determined during the fourth phase of study. In the resulting model, different critical coordinates points from the initial year (1992) to 2045 were selected five time-steps. Results show no critical faults reactivation but by increasing production time the instability of fractures gradually rises by stress regime changes.","PeriodicalId":46470,"journal":{"name":"Geomechanics and Geoengineering-An International Journal","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17486025.2021.1955156","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48870350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0