Experimental Study on Shear Failure Mechanism and the Identification of Strength Characteristics of the Soil‐Rock Mixture

Sun, Shaorui; Zhu, Feng; Wei, Jihong; Wang, Wuchao; Le, Huilin

doi:10.1155/2019/7450509

Cited by 11 publications

(7 citation statements)

References 9 publications

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“…The bulk density of the soil was done on the site by core-cutter method. The field results show that the bulk unit weight ranges from 16.18kN/m3 to 17.95kN/m3 (20) .…”

Section: Soil Index Propertiesmentioning

confidence: 99%

Experimental Investigation and Mapping of Index and Shear Behavior of Soils a Case in Gimbichu Town, Ethiopia

Gaenamo¹,

Dirate²,

Dasho³

et al. 2022

IJST

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Objectives: To study experimental investigation on index and engineering properties of fine-grained soils by conducting laboratory tests and to prepare a soil spatial map using ArcGIS software of Gimbichu town, Ethiopia. Methods: Hence, ten test pits were selected according to the variation of the soil and the distribution of the dwellings. The soil samples were collected by direct manual excavated to 1.5m and 3.0m depth on which both laboratory and field tests were conducted for index and shear properties. Findings: Index properties revealed that soils in the study area are mostly silt soils with high plasticity and partly low plasticity. It is indicated that the soils are medium to very stiff with unconfined compressive strength of 53.70 to 216.40kPa and undrained shear strength of 26.67 to 108.20 kPa. Permeability and consolidation investigation results presented soils in the town are silt group. The spatial soil property map is created for experimentally determined results at 1.50m and 3.0m depths using ArcGIS software to retain soil properties in order to earn time and cost of the investigation in the field and laboratory. These maps are required for recognizing, identifying, and classification of soil categories within delineated parts of the current study town. Novelty: Investigation and ArcGIS spatial mapping for soil properties are essential for future boosting of the design and construction buildings of this town that was not applied before in investigation lagged areas like Gimbichu town.

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“…The bulk density of the soil was done on the site by core-cutter method. The field results show that the bulk unit weight ranges from 16.18kN/m3 to 17.95kN/m3 (20) .…”

Section: Soil Index Propertiesmentioning

confidence: 99%

Experimental Investigation and Mapping of Index and Shear Behavior of Soils a Case in Gimbichu Town, Ethiopia

Gaenamo¹,

Dirate²,

Dasho³

et al. 2022

IJST

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“…where: m 0 is the specimen weight, g; V is the specimen volume, cm 3 ; ρ d is the maximum dry density, g/cm 3 ; w o is the optimum water content, %; and K is the compaction degree, %.…”

Section: Specimen Preparationmentioning

confidence: 99%

“…SRM is composed of coarse rocks and fine soils with a certain gradation, and possesses better water permeability, higher strength and compactness than soil [1]. However, the compaction and mechanical properties of SRM are complicated due to large difference in particle size and uneven gradation [2][3][4][5]. Therefore, a lot of research on the influencing factors of SRM road performance has been performed.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Properties of Soil–Rock Mixture Prepared by the Laboratory Vibration Compaction Method

Dai³

et al. 2021

Sustainability

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This paper presents a study of the properties of soil–rock mixtures (SRM) prepared by the vibration compaction method. First, the results of laboratory experiments and field tests are compared to determine the reasonable parameters of the vibration compaction method (VCM) for soil–rock mixtures. The compaction characteristics, CBR, and resilient modulus of the laboratory-prepared soil–rock mixtures by the static pressure compaction method (SPCM) and vibration compaction method are compared. The effects of the soil to rock ratio and the maximum particle size and gradation on the compaction characteristic, resilient modulus and CBR of soil–rock mixtures prepared by the vibration compaction method are investigated. Finally, field measurements are subsequently conducted to validate the laboratory investigations. The results show that the reasonable vibration frequency, exciting force, and static surface pressure of the vibration compactor for soil–rock mixtures are recommended as 25 Hz, 5.3 kN, and 154.0~163.2 kPa, respectively. Soil–rock mixtures prepared by vibration compaction method has smaller optimum water content and gradation variation and larger density than specimens prepared by the static pressure compaction method, and the CBR and resilient modulus are 1.46 ± 0.02 and 1.16 ± 0.03 times those of specimens prepared by the static pressure compaction method, respectively. The ratio of soil to rock, followed by the maximum particle size, lead obvious influences on the properties of soil–rock mixtures. Moreover, the results show that the CBR and resilient modulus of soil–rock mixtures prepared by vibration compaction method have a correlation of 86.9% and 89.1% with the field tests, respectively, which is higher than the static pressure compaction method.

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“…According to the scholars put forward the classification standard of soil and rock blocks which is related to the characteristic size of SRM engineering [25,26]. In this paper, a cylindrical shear box with a diameter of 250 mm and a height of 100 mm was selected for the direct shear test of SRM.…”

Section: Evolution Mechanism Analysismentioning

confidence: 99%

Study on Spatial Variation of Shear Mechanical Properties of Soil-rock Mixture

Wang¹,

Li²,

Qiao³

et al. 2019

Period. Polytech. Civil Eng.

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The soil-rock mixture (SRM) is a kind of special engineering geological material, which has been exposed to the field for a long time and is affected by rainwater seepage, geological force, slope sliding force and human activities, resulting in the spatial variability of its mechanical properties. Taking the SRM distributed on a slope of the Three Gorges Reservoir area as the research object, four test locations were selected along and transverse the slope. First, in-situ large-scale direct shear test was carried out, and then the laboratory large-scale direct shear test, particle sieving test, and water content test were carried out in the undisturbed sample to study the variation of shear mechanical properties of SRM distributed in different spatial locations. The results show that: (1) Under the same normal stress, the peak strength of the SRM decreases at a similar rate along the slope direction and the transverse slope direction. (2) The cohesion of the SRM is continuously strengthened, and the friction angle is continuously deteriorated along the slope from high to low, the cohesion and friction angle are almost no variability along the transverse slope. (3) The mechanism of the above-mentioned variation in the shear mechanics parameters of SRM is that the lower the elevation along the slope, the more fragmented the rock, the lower the rock content. (4) Spatial variability models of cohesion and friction angle of SRM were established, which can provide references for related engineering applications.

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Experimental Study on Shear Failure Mechanism and the Identification of Strength Characteristics of the Soil‐Rock Mixture

Cited by 11 publications

References 9 publications

Experimental Investigation and Mapping of Index and Shear Behavior of Soils a Case in Gimbichu Town, Ethiopia

Experimental Investigation and Mapping of Index and Shear Behavior of Soils a Case in Gimbichu Town, Ethiopia

Characterization of Properties of Soil–Rock Mixture Prepared by the Laboratory Vibration Compaction Method

Study on Spatial Variation of Shear Mechanical Properties of Soil-rock Mixture

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