Injection of saline solutions to improve the electro-osmotic pressure and consolidation of foundation soil

Chien, Shih‐Chang; Ou, Chang‐Yu; Wang, Ming-Kuang

doi:10.1016/j.clay.2009.02.006

Cited by 77 publications

(16 citation statements)

References 19 publications

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“…The first successful demonstration of the use of EK technique for soil remediation was performed in the Netherlands in 1986 and some other places in Europe and US for the removal of the toxic chemical species. These successful studies and applications encouraged some other researchers and in-situ studies, resulting in some breakthroughs in the understanding of EK phenomena to improve physical properties of low permeable soils for many approaches such as: improving stability of excavations and unstable embankments [18], [19], backfill strengthening and slope stabilization [18], [20], stabilization of soils by consolidation [21][22][23][24][25][26][27][28][29], soil drainage and ground water lowering [30], soil improvement stabilization of fine-grained soils [31][32][33][34][35][36][37][38], remediation of salt affected soils [1], dewatering of sludge [39][40][41], assisting pile driving [42][43][44][45] and treatment of dispersive soils [46], [47].…”

Section: History/development Of Ek Treatmentmentioning

confidence: 99%

A Review of Electrokinetic Treatment Technique for Improving the Engineering Characteristics of Low Permeable Problematic Soils

Mosavat¹,

Oh²,

Chai³

2012

geomate

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Section: History/development Of Ek Treatmentmentioning

confidence: 99%

A Review of Electrokinetic Treatment Technique for Improving the Engineering Characteristics of Low Permeable Problematic Soils

Mosavat¹,

Oh²,

Chai³

2012

geomate

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“…Electroosmosis improves the permeability coefficient of the soil and reduces the amount of weakly absorbed water regardless of grain assize [32]. In recent years, electroosmotic strengthening of soil has been widely studied [33][34][35][36]. This study employed a series of model tests to quantitatively analyze foundation settlement, pore water pressure inside the soil, soil moisture content before and after reinforcement, and undrained shear strength of the soil.…”

Section: Introductionmentioning

confidence: 99%

Model Tests of Soil Reinforcement Inside the Bucket Foundation with Vacuum Electroosmosis Method

et al. 2019

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Offshore wind turbine foundations are commonly subjected to large horizontal, vertical, and bending moment loads. Marine soils have high moisture content, high compressibility, high sensitivity, and low strength, resulting in insufficient foundation bearing capacity. In order to improve the bearing capacity of wind turbine foundations and reduce foundation settlement, an internal vacuum preloading method combined with electroosmosis reinforcement is used to reinforce the soil within bucket foundations. The pore water pressure, vertical settlement, pumping quality of the soil during the reinforcement process, soil moisture content before and after the reinforcement, and undrained shear strength were analyzed. Horizontal and vertical bearing capacity model tests were carried out on the reinforced and nonreinforced soil inside the bucket foundation. Results show that vacuum preloading combined with electroosmosis reinforcement reduces soil moisture content inside the bucket foundation by approximately 20%, and the undrained shear strength of the internal soil increases by approximately 20 times. Soil reinforcement has high spatial uniformity. Results of the bucket foundation bearing capacity model show that when the soil inside the bucket foundation is strengthened, horizontal bearing capacity increased by 2.9 times and vertical bearing capacity increased by 2.1 times. Vacuum preloading combined with electroosmosis reinforcement can effectively improve the shear strength of soft soil and enhance the bearing capacity and stability of bucket foundations.

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“…is technique is performed to (i) reduce electrode erosion, (ii) increase soil electroconductivity, (iii) enhance the speed of draining water during electroosmosis, and (iv) promote aggregation of soil particles due to ionic exchange. erefore, a substantial increase in the soil strength is obtained to increase consolidation efficiency for soft soil [2,3]. Chien studied the application of ECT on the foundation [4].…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement in Pile Anchor System for Deep Foundation Excavation Using Electroosmotic Chemical Treatment

Zhang

Wang

et al. 2019

Advances in Civil Engineering

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Anchoring force is vital to ensure the acceptable performance of a pile anchor system when supporting deep foundation excavation. e soft soil has several physical properties, such as low shear strength, high water content, large void ratio, and high flowability. Traditional grouting and anchoring techniques have demonstrated technical limits to deal with these soil properties in engineering projects, and accordingly, the anchoring force in the pile anchor system is difficult to meet design requirements. is paper conducted an experimental investigation on the performance improvement in a pile anchor system using the electroosmotic chemical treatment method, with an emphasis on the deep foundation application. Experimental tests and field studies were designed to enhance anchor capacity of a pile anchor system using self-designed devices. e laboratory experiments utilized a simplified anchor system in which anchors were designed as the electrodes to conduct the electroosmotic chemical treatment and consolidate the soft marine soil collected from the project site. In addition, static load tests were conducted on the tested soil to measure the anchoring force. Finally, parametric analyses were performed to investigate effects of several parameters on anchoring force in terms of the ultimate pull-out capacity of the anchor, identifying critical parameters for the field study. Based on laboratory test results, field studies were carried out in the Yingkou city. e results from field studies were compared with laboratory test results to validate feasibility of electroosmotic chemical treatment for a pile anchor system.

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Injection of saline solutions to improve the electro-osmotic pressure and consolidation of foundation soil

Cited by 77 publications

References 19 publications

A Review of Electrokinetic Treatment Technique for Improving the Engineering Characteristics of Low Permeable Problematic Soils

A Review of Electrokinetic Treatment Technique for Improving the Engineering Characteristics of Low Permeable Problematic Soils

Model Tests of Soil Reinforcement Inside the Bucket Foundation with Vacuum Electroosmosis Method

Performance Improvement in Pile Anchor System for Deep Foundation Excavation Using Electroosmotic Chemical Treatment

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