Controlled Permeation Grouting Method for Mitigation of Liquefaction

Rasouli, Rouzbeh; Hayashi, Kentaro; Zen, Kouki

doi:10.1061/(asce)gt.1943-5606.0001532

Cited by 29 publications

(18 citation statements)

References 6 publications

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“…To settle this problem, Rasouli et al (2016) reported a method where the delivering injection nozzle to the designated area uses a controlled curved drilling (CCD) machine [37], as shown in Figure 14. The new CCD machine used for CS grouting originates from the curved drilling machine that has been adopted in the oil industry [71,72].…”

Section: Advancement For Cs Transportmentioning

confidence: 99%

“…Colored tracer chemicals can be grouted and transported with CS to provide a visual observation method to indicate the location where the stabilizer has arrived at. Generally, red food coloring and the methyl red indicator are selected as the tracer materials here [7,37,40,45]. Red food coloring is mostly adopted in the column test and centrifuge model test to reflect the grouting quality.…”

Section: Colored Tracer Chemicalmentioning

confidence: 99%

“…2019, 9, x FOR PEER REVIEW 15 of 31 Figure 16. Checking grout quality using the methyl red indicator [37].…”

Section: Colored Tracer Chemicalmentioning

confidence: 99%

“…To avoid overestimation, Rasouli et al (2016) suggested that the silica content can be measured by atomic absorption spectrometry (ABS) [37]. In this method, 100 mL of potassium hydroxide with a concentration of 20% is added for every 50 g of improved soil sample.…”

Section: Silica Contentmentioning

confidence: 99%

“…In this instance, an unconsolidated undrained (UU) triaxial test can be used to obtain the Mohr's stress circle. Then, the shear strength can be deduced from the failure line and finally the unconfined compression strength can be calculated by multiplying the shear strength by 2 [37].…”

Section: Unconfined Compression Strengthmentioning

confidence: 99%

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State-of-the-Art of Colloidal Silica-Based Soil Liquefaction Mitigation: An Emerging Technique for Ground Improvement

et al. 2019

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In the booming field of nanotechnology, colloidal silica (CS) has been introduced for ground improvement and liquefaction mitigation. It possesses a great ability to restrain pore pressure generation during seismic events by using an innovative stabilization technique, with the advantages of being a cost-effective, low disturbance, and environmentally friendly method. This paper firstly introduces molecular structures and some physical properties of CS, which are of great importance in the practical application of CS. Then, evidence that can justify the feasibility of CS transport in loose sand layers is demonstrated, summarizing the crucial factors that determine the rate of CS delivery. Thereafter, four chemical and physical methods that can examine the grouting quality are summed and appraised. Silica content and chloride ion concentration are two effective indicators recommended in this paper to judge CS converge. Finally, the evidence from the elemental tests, model tests, and field tests is reviewed in order to demonstrate CS’s ability to inhibit pore water pressure and lower liquefaction risk. Based on the conclusions drawn in previous literature, this paper refines the concept of CS concentration and curing time being the two dominant factors that determine the strengthening effect. The objective of this work is to review CS treatment methodologies and emphasize the critical factors that influence both CS delivery and the ground improving effect. Besides, it also aims to provide references for optimizing the approaches of CS transport and promoting its responsible use in mitigating liquefaction.

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Section: Advancement For Cs Transportmentioning

confidence: 99%