The highly intense and short-duration rainfall (I≥8Ks) has no significant effect on the safety of the soil, as most of the precipitation will contribute to runoff, and only a minor amount of water will infiltrate into the slope. The results show that due to the low hydraulic conductivity and fine-grained nature of the soil, the slopes in the study area are more critical to the low intensity and long duration rainfall events (I≤4Ks). The result obtained in this study was utilized for the preliminary rainfall slope stability assessment in tropical residual soils by simulating rainfall of different intensities and duration on a typical slope profile using PLAXIS 2d. The average undrained shear strength and unconfined compressive strength were 105 kPa and 43 kPa, respectively. Residual soils are distributed throughout many regions of the world, such as Africa, South Asia, Australia, Southeastern North America, Central and South America, and considerable regions of Europe. The effective cohesion and angle of the internal fraction were 8 kPa and 32°, respectively. Residual soil is the material resulting from the in situ weathering of the parent rock which has not been transported from its place of origin. Saturated hydraulic conductivity from the falling head test is 2.32055E-07 m/s, while the saturated gravimetric water content was 54%. 14 Country case study: engineering geology of tropical residual soils in. The maximum dry unit weight and optimum moisture content are 13.17kN/m3 and 30 %, respectively. 8.2 Geotechnical aspects of residual soil material used for land development. Based on the particle size distribution and consistency the soil can be classified as high plasticity silt (MH).
#RESIDUAL SOIL SERIES#
A series of experiments involving index properties tests and engineering properties tests were carried out on the residual soil samples collected from a slope located in UniversitiTeknologi Malaysia (UTM). Therefore, this study aims to characterize the residual soil for numerical modelling of rainfall-induced slope failure and preliminary slope stability assessment so that future slope failure can be reduced. Soil susceptibility to accelerated hydric erosion: geotechnical evaluation of cut slopes in residual soil profiles/Suscetibilidade de solos a erosao. To reduce the expected disastrous impacts due to rainfall-induced slope failure characterization of residual soil is necessary for evaluation of slope stability assessment. The RRS soil (red residual soil) was classified as MH by the Unified Soil Classification System-USCS (DNIT, 2006) and as A-7-5 by the Transportation Research Board System-TRB (DNIT, 2006). Over the years, these rainfalls have induced instabilities that lead to significant human and economic loss. The soil which is deposited by gravity force can be transported either by water or air. Apart from the above four soil transportation types, the soil can be transported by multiple natural agents. Loes soil has high permeability and low density. Slope instability is a common natural geological hazard in tropical countries like Malaysia, with abundant residual soil and frequent rainfall. Loes The soil transported in very long distances is mostly silt or clay soil. For soil–geotextile interfaces, the coefficients of interaction varied from 0.54 to 0.85.: Residual soil, Slope Instability, Rainfall,Plaxis 2D Abstract For soil–geogrid interfaces, the coefficients of interaction ranged from 0.71 to 0.99. Among the different geosynthetics tested, the biaxial geogrid was found to be the most effective reinforcement for this particular type of soil, concerning the direct shear mechanism. Regardless of soil moisture content, soil density proved to have a remarkable influence on interface shear strength, particularly when geogrids were used. Test results have revealed that the increase in soil moisture content can measurably reduce the soil–geosynthetic interface shear strength. The study involved a locally available granite residual soil and four geosynthetics: two geogrids (one uniaxial and the other biaxial), one geocomposite reinforcement (high-strength geotextile) and one geotextile.
![residual soil residual soil](https://i.ytimg.com/vi/F-K6NfxsK7o/maxresdefault.jpg)
This paper describes an extensive laboratory study carried out using a large-scale direct shear test device, in which the influence of soil moisture content, soil density and geosynthetic type on the direct shear behaviour of the soil–geosynthetic interface was evaluated. Taken together, Fundamentals of Soil Mechanics for Sedimentary and Residual Soils is a comprehensive, balanced soil engineering sourcebook that will prove indispensable for practitioners and students in civil engineering, geotechnical engineering, structural engineering, and geology.
![residual soil residual soil](https://4.bp.blogspot.com/-N3xJAcYw1gM/W1QhQGaqaJI/AAAAAAAAyu8/bHjQpv_-xk4beWBXDhGOP9-mzTwmYh8UACLcBGAs/s1600/20180722_102029.jpg)
Economic and environmental reasons have led to increasing use of locally available residual soils with a significant percentage of fines and lower draining capacity, when compared with the traditional good-quality backfill materials. ABSTRACT: Soil–geosynthetic interface shear strength is an essential parameter for the design and stability analysis of geosynthetic-reinforced soil structures.