A field trial for soft clay consolidation using electric vertical drains

Chew, Soon Hoe; Karunaratne, G. P.; Kuma, V.M; Lim, Renee Lay Hong; Toh, Ming-Ren; Hee, A. M.

doi:10.1016/s0266-1144(03)00049-9

Cited by 81 publications

(32 citation statements)

References 5 publications

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“…(6). It was clear that the organic matters were formed during the tests and that the generated organic matters potentially contained iron oxides (i.e., Iron (II) oxide, Iron (III) oxide-hydroxide, and Iron (II) hydroxide) [9,13,14,21,22,36]. However, the proportion of these organic matters was not determined by testing.…”

Section: Resultsmentioning

confidence: 99%

Electro-Osmosis Chemical Treatment of High-Salinity Soft Marine Soils: Laboratory Tests

Zhang¹,

Jing²,

Wang³

et al. 2017

TOCIEJ

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Abstract:The electro-osmosis chemical treatment (ECT) is a useful method for improving soil strength. Some laboratory tests on ECT for strengthening high-salinity soft marine soils were investigated using self-designed laboratory facilities in this research. This study focused on improving the mechanical properties by using ECT method and analyzed the effects of using CaCl 2 solution on soil strength owing to the electrolyte is an important factor for improving the bearing capacity of the high-salinity marine soils. Three groups of tests with different time for consolidation were performed to analyze the effective consolidation time on the ECT. In addition, several practical issues, including the current, voltage, energy consumption and the bearing capacity of the treated soils before and after experiments, were considered in the tests. The laboratory tests results demonstrated that the ECT technique is an effective method for improving the high-salinity marine soft soils. Furthermore, the definition of the effective time for consolidation was proposed for the ECT of high-salinity soft marine soils to improve the feasibility and economical efficiency of the ECT. This study provides some references and suggestions for practical application of the ECT technique for marine soft soils.

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Section: Resultsmentioning

confidence: 99%

Electro-Osmosis Chemical Treatment of High-Salinity Soft Marine Soils: Laboratory Tests

Zhang¹,

Jing²,

Wang³

et al. 2017

TOCIEJ

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“…Electro-osmotic consolidation studies on clay soils have been carried out worldwide (Bergado et al 2000;2003;Bo et al 2000;Casagrande 1952;Casagrande et al 1981;Chappel and Burton 1975;Chew et al 2004;Eggestad and Foyn 1983;Fetzer 1967;Gray and Mitchell 1967;Karunaratne et al 2002;Lo et al 2000;Shang 1997a;Toh et al 2001;Transports Québec 2010;Wade 1976).…”

Section: Past Electro-osmotic Consolidation Studiesmentioning

confidence: 99%

Electro-Osmotic Consolidation Experiments on an Organic Soil

Kaniraj

Yee

2011

Geotech Geol Eng

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A series of electro-osmotic consolidation experiments were carried out on an organic soil from the central Sarawak region of Malaysia. Commercially available EVD was used to induce electroosmosis and drainage of pore water. The influence of the method of drainage and pumping interval of drained water on electro-osmotic consolidation was investigated. The combination of electro-osmotic consolidation and chemical stabilization techniques was investigated by installing lime or cement columns near the anode end of the test bed. The binder factor in the lime and cement columns was varied. The paper presents the experimental set-up, test procedures, experimental program, results and conclusions of the study. Electro-osmosis, using EVDs, was effective in the electrokinetic treatment of the organic soil. The two types of drainage, namely drainage at bottom and drainage tubes, were effective. Electro-osmotic consolidation improved with decrease in pumping interval. The lime and cement columns, used in combination with electro-osmosis, increased the undrained strength further.

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“…Studies using EVDs have shown the potential for the application of EKG materials in electrokinetic stabilization of soft clays, mine tailings and sludges (Hamir et al 2001;Fourie et al 2007;Glendinning et al 2007Glendinning et al , 2008Rittirong et al 2008). Electro-osmotic consolidation studies using EKG materials as electrodes have been carried out on the soils of Southeast Asia also (Bergado et al 2000(Bergado et al , 2003Chew et al 2004;Lorenzo et al 2004;Lee and Douglas 2007).…”

Section: Electrokinetic Geosynthetics (Ekg)mentioning

confidence: 99%

“…The specimen was extruded from the Shelby tube, sliced into a few segments and In field applications, the voltage gradient typically ranges from 10 to\100 V/m (Shang 1998). But, in many laboratory studies higher voltage gradients have been used, for example 60 and 120 V/m by Bergado et al (2000Bergado et al ( , 2003, 100 and 150 V/m by Chew et al (2004), 110 V/m by Fourie et al (2007), 100 V/m by Glendinning et al (2007) their moisture contents were determined to know the spatial variation in moisture content after consolidation.…”

Section: General Experimental Proceduresmentioning

confidence: 99%

Electro-Osmotic Consolidation Studies on Peat and Clayey Silt Using Electric Vertical Drain

2010

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Peat and soft soil deposits are abundant in Malaysia. Studies using electrokinetic geosynthetics (EKG) such as prefabricated electric vertical drains (EVD or ePVD) have shown the potential for the application of these materials in electrokinetic strengthening of soft clays and increasing solids content in mining tailings and sludges. There are no studies reported on the effectiveness of electro-osmosis using EVD in peat. Laboratory experiments were carried out to investigate the effectiveness of electroosmotic stabilization of two peat samples and a slightly organic clayey silt sample, from the North Sarawak region. Commercially available EVD was used to induce electro-osmosis and drainage of pore water. The influence of voltage gradient, organic content, initial water content, anode-cathode configuration and presence of roots on electro-osmotic consolidation was investigated. Electro-osmotic consolidation using EVDs was effective in the improvement of peat, over a large range of initial water contents. An increase in the voltage gradient generally improved consolidation. The maximum voltage gradient for optimum results appeared to be in the region 120 V/m. The 2anodes-1cathode configuration performed better than the 1anode-1cathode configuration. The presence of roots reduced the electro-osmosis effect.

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A field trial for soft clay consolidation using electric vertical drains

Cited by 81 publications

References 5 publications

Electro-Osmosis Chemical Treatment of High-Salinity Soft Marine Soils: Laboratory Tests

Electro-Osmosis Chemical Treatment of High-Salinity Soft Marine Soils: Laboratory Tests

Electro-Osmotic Consolidation Experiments on an Organic Soil

Electro-Osmotic Consolidation Studies on Peat and Clayey Silt Using Electric Vertical Drain

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