Kamchoom, Viroon

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Kamchoom, Viroon
Alternative Name
Kamchoom, V.
Main Affiliation
Email
viroon.ka@kmitl.ac.th

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    Item type:Publication,
    Influence of physical and biochemical composition of three cellulose fibers on cracking of soil
    (2019-01-01)
    Boddu, Rishita
    ;
    Hong, Min
    ;
    Yongkang, Deng
    ;
    Fengjiao, Chen
    ;
    Garg, Ankit
    Different soil improvement techniques have been used to intensify the engineering properties of soil. Three different lignocellulose fiber-reinforced (jute, coir and water hyacinth (WH)) have been explored on the desiccation potential of compacted clayey silt coil. The experimental methodology involved the mixing of fibers with soil at requisite amount and subjecting them to natural environment with controlled irrigating. The controlled irrigation comprised of 15 wetting/drying cycles for 105 days. Parameters like matric suction and water content were focused upon and recorded along with the surface crack formation. The data obtained from the field experiments were analyzed using the Artificial Neural Network (ANN) approach, which is developed in house using C++ language. From the analysis, it can be comprehended that coir is more effective as a reinforcement due to its multifilament nature and higher lignin content which is suitable in resisting crack formation. Further, optimization analysis and sensitivity analysis suggested mechanism of cracking for each fiber.
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    Item type:Publication,
    Hydro-mechanical reinforcements of live poles to slope stability
    (2018-12-01)
    Kamchoom, Viroon
    ;
    Leung, Anthony K.
    Soil bioengineering using live poles is an environmentally friendly technique for shallow slope stabilisation. However, it remains unclear in this technique whether the hydrological effects of pole transpiration are significant to slope stabilisation, compared to mechanical reinforcement by structural poles and their fibrous roots. The aims of this study were to investigate the hydro-mechanical reinforcement effects of live poles and to evaluate their effectiveness for shallow slope stabilisation, giving due consideration to the different pole growth stages. Finite-element seepage-stability models were developed and validated against centrifuge model tests that investigated the rainfall-induced instability of a 45-degree clayey sand slope subjected to intense rainfall. The short-term stability right after the installation of the poles is critical because only structural poles, i.e., without fibrous root reinforcement or water uptake, are insufficient for reinforcement, even those as long as 2 m. Due to the absence of pole transpiration, positive pore water pressure of up to 10 kPa was built up near the slope toe, causing the significant mobilisation of shear strain and consequentially slope failure. In longer term, during which fibrous roots developed and provided additional mechanical reinforcement (via root cohesion) and transpiration-induced suction, no slope failure occurred due to the considerable amount of suction that was retained within the pole zone. It was mainly the pole transpiration before the rainfall, i.e., antecedent drying, that retained the suction, rather than the transpiration that took place during the rainfall.