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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: A review of the geosynthetic encased stone column as a ground improvement technique is presented in this article, where the authors identify key considerations for the general use of encased Stone columns, provide insights for design and construction, and compile the latest research developments.
Abstract: The engineering structures constructed on thick deposits of soft soil strata have problems of low bearing capacity, excessive total and differential settlement, lateral spreading etc. To mitigate such problems, different ground improvement techniques are available namely; vertical drains, lime/cement column, stone (granular) column etc. in view of their proven performance, short time schedule, durability, constructability and low costs. Stone column technique seems to be very suitable and favourable ground improvement technique for deep soft soil improvement. Further to prevent excessive bulging, squeezing of stone into soft soil, stone column can be encased with suitable geosynthetic. Another advantage of encasement is having high load carrying capacity and lesser settlement of composite foundation. This paper presents the current state of the geosynthetic encased stone column as a ground improvement technique. A review is provided aiming to: (a) identify key considerations for the general use of encased stone columns, (b) provide insights for design and construction, (c) compile the latest research developments. Case histories of field applications and observed field performance are cited to portray different stone column applications and observed effectiveness. The paper identifies areas where more research is needed and includes recommendations for future research and development.

12 citations

Journal ArticleDOI
TL;DR: In this paper, a stabilized soil structure formation model was introduced, in which cementitious hydrates were needed to wrap and bind the soil aggregates, and expansible hydrate was needed to squeeze and fill the pores, especially the pores in aggregates.
Abstract: A stabilized soil structure formation model was introduced. In order to form compact stabilized soil structure, cementitious hydrates were needed to wrap and bind the soil aggregates. Meanwhile, expansible hydrates were needed to squeeze and fill the pores, especially the pores in the aggregates. The experimental results show that the influences of various chemical characteristic factors of soil on the strength of the stabilized soil are boiled down, for the influence on the concentration of Ca(OH)2 in the pore solution of the stabilized soil, and the amount of CSH generated by cement. Finally an optimization design method is proposed, with which the stabilizer can be designed according to characteristics of soil samples.

12 citations

Journal ArticleDOI
TL;DR: In this paper, an attempt has been made to use β-glucan a natural biopolymer for the stabilization of lean clay as a sustainable alternative with specific emphasis on comprehending the effect of confining stresses on lean clay through triaxial compression tests.
Abstract: The choice of eco-friendly materials for ground improvement is a necessary way forward for sustainable development. Adapting naturally available biopolymers will render the process of soil stabilization carbon neutral. An attempt has been made to use β-glucan a natural biopolymer for the stabilization of lean clay as a sustainable alternative with specific emphasis on comprehending the effect of confining stresses on lean clay through triaxial compression tests. A sequence of laboratory experiments was performed to examine the various physical and mechanical characteristics of β-glucan treated soil (BGTS). Micro-analysis through micrographs were used to understand the strengthening mechanism. Results of the study show that the deviatoric stress of 2% BGTS is 12 times higher than untreated soil (UTS). The micrographs from Scanning Electron Microscopy (SEM) and the results of the Nitrogen-based Brunauer Emmett Teller (N2-BET) analysis confirm the formation of new cementitious fibres and hydrogels within the soil matrix that tends to weld soil particles and reduce the pore spaces leading to an increase in strength. Hydraulic conductivity (HC) and compressibility reduced significantly with the biopolymer content and curing period. Results emphases that β-glucan is an efficient and sustainable alternative to the traditional stabilizers like cement, lime or bitumen.

12 citations

Journal ArticleDOI
TL;DR: In this article, the authors carried out field and laboratory tests in a top cement improved residual soil layer, and the results showed that the unconfined compressive strength increased along with the cement percentage and with the reduction of the porosity of the compacted mixture.
Abstract: Present research aims to carry out field and laboratory tests in a top cement improved residual soil layer. Regarding laboratory tests, the isolated influence of parameters such as cement percentage, porosity and water content will be studied after unconfined compression testing. Test results showed that the unconfined compressive strength (qu) increased along with the cement percentage and with the reduction of the porosity of the compacted mixture. It was still possible to verify that the water content had reduced influence on the unconfined compressive strength, which was basically dependent of porosity and amount of cement. The research also studied the behavior of plate load tests with different diameters (D) bearing on a treated layered system with different thickness (H) considering 5% of portland cement (determined after analysis of unconfined compression test results). Triaxial tests were also carried out in specimens retrieved from the cement treated layer, cone penetration tests (CPT) were done in the cement improved layer and the outcome shows a substantial increase in tip cone resistance comparatively with the natural soil. A finite-element analysis of the plate load tests was carried out using the elastic-perfectly plastic model with Drucker-Prager failure criterion that proved suitable for the simulation. After processing results of plate load tests bearing on the cemented layered system, it was verified that the applied pressure versus settlement to diameter ratio correlation is controlled by the H/D relation, in which this factor increase takes to a stiffer and stronger response. DOI: 10.1061/(ASCE)MT.1943-5533.0000725. © 2014 American Society of Civil Engineers. Author keywords: Porosity/cement ratio; Shallow foundations; Cemented soil; Cone penetration test; Layered soils; Numerical simulation.

12 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202364
2022128
2021213
2020167
2019173
2018168