Topic
Soil stabilization
About: Soil stabilization is a research topic. Over the lifetime, 3161 publications have been published within this topic receiving 48437 citations.
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TL;DR: In this article, the authors present the process and results of a quality management program performed during and immediately after the construction of two deep soil mixing (DSM) test sections, which consisted of laboratory, in situ, and mineralogical tests to address the effectiveness of the treatment during and after construction.
Abstract: This paper presents the process and results of a quality management program performed during and immediately after the construction of two deep soil mixing (DSM) test sections. The quality management program consisted of laboratory, in situ, and mineralogical tests to address the effectiveness of the treatment during and after construction. In situ investigations including the down-hole seismic and spectral analysis of surface waves (SASW) test methods were performed to evaluate the degree of improvement achieved through the measurement of compression and shear-wave velocities of the columns and surrounding soils. Scanning electron microscopy and electron dispersive x-ray analysis were performed on raw, laboratory treated and field-treated specimens for qualitative understanding of the degree of mixing achieved in the field and the compounds formed at particle level during stabilization, respectively. Laboratory tests results on field cores indicated that both field stiffness and strength are about 20 to 40% less than the corresponding laboratory prepared soil samples. The down-hole seismic and SASW tests showed considerable improvement in stiffness in and around the DSM columns. Mineralogical studies indicated the formation of silica and alumina hydrates along with interwoven structure of lime-cement treated clay particles in both laboratory and field specimens, suggesting adequate mixing of the soil and binder in both environments.
55 citations
TL;DR: In this article, a model test of a composite foundation in a steel cylindrical mold was conducted to investigate the consolidation behavior of the composite foundation treated by the deep cement mixing (DCM) method.
Abstract: A physical model test of a composite foundation in a steel cylindrical mould was conducted to investigate the consolidation behaviour of the composite foundation treated by the deep cement mixing (DCM) method. Pore water pressures at different locations in the untreated soft clay and the earth pressure and load acting on the untreated soft clay and the DCM column in the composite foundation model were measured throughout testing. Settlement, radial drainage behaviour and loading distribution and transfer were studied. The failure mode of the composite foundation was examined and failure of the composite foundation was largely attributed to the local failure of the DSM soil column.
54 citations
TL;DR: In this article, the influence of relative density of foundation soil on performance improvement of geocell reinforcement was brought out through model load tests on geocell-reinforced and unreinforced sand beds.
Abstract: The paper brings out the influence of relative density of foundation soil on performance improvement of geocell reinforcement; through model load tests on geocell-reinforced and unreinforced sand beds. Tests were carried out for five different relative densities of sand (30, 40, 50, 60, and 70%). The test results indicate that the beneficial effect of geocell reinforcement, in terms of increase in stiffness, bearing capacity, and load dispersion angle of the foundation bed, is present over a wide range of relative density; however, it is higher for dense condition of foundation soil. With geocell reinforcement offering three-dimensional confinement, the dilation induced benefit is substantially high for dense soil fill. Therefore, for effective utilization of geocell reinforcement, the foundation soil should be compacted to higher density.
54 citations
11 Mar 2011
TL;DR: In this paper, the potential for inducing carbonate precipitation in soil via bacterial denitrification using bench-scale experiments with the facultative anaerobe Pseudomonas denitrificans was evaluated.
Abstract: Microbially induced carbonate precipitation (MICP) and associated biogas production may provide sustainable means of mitigating a number of geotechnical challenges associated with granular soils. MICP can induce interparticle soil cementation, mineral precipitation in soil pore space and/or biogas production to address geotechnical problems such as slope instability, soil erosion and scour, seepage of levees and cutoff walls, low bearing capacity of shallow foundations, and earthquake-induced liquefaction and settlement. Microbial denitrification has potential for improving the mechanical and hydraulic properties of soils because it promotes precipitation of calcium carbonate (CaCO3) and produces nitrogen (N2) gas without generating toxic by-products. We evaluated the potential for inducing carbonate precipitation in soil via bacterial denitrification using bench-scale experiments with the facultative anaerobe Pseudomonas denitrificans. Bench-scale experiments were conducted (1) without calcium in...
54 citations
TL;DR: The procedure of soil treatment with industrial and domestic wastes such as ground glass and coal ash (acting as pozzolans) and carbide lime is a sustainable practice when the assignment in...
Abstract: The procedure of soil treatment with industrial and domestic wastes such as ground glass and coal ash (acting as pozzolans) and carbide lime is a sustainable practice when the assignment in...
54 citations