Assessment of Ground Improvement by Vibro-compaction Method for Liquefiable Deposits from In-Situ Testing Data

Duan, Wei; Cai, Guojun; Liu, Songyu; Yuan, Jian; Puppala, Anand J.

doi:10.1007/s40999-018-0348-2

Cited by 22 publications

(6 citation statements)

References 29 publications

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“…Based on the particle size distribution of the soil (Figure 1a) and Unified Soil Classification System, the soil is designated as poorly graded sand with silt (SP-SM). The compaction curve, obtained following the Standard Proctor method (Figure 1b), specifies the optimum water content of 8.2% with its corresponding maximum dry density of 1.73 g/cm 3 . X-ray diffraction analysis (XRD) and Energy Dispersive X-ray Analysis (EDX) were conducted to analyze the chemical composition of the Dejgah soil samples.…”

Section: Soil Characteristicsmentioning

confidence: 99%

“…In response to these challenges, several soil improvement techniques have been developed to date. They are categorized into two main groups: chemical soil amendments and physical methods such as vibro-compaction, dynamic compaction, surcharge loading, and pile installation [2][3][4][5][6][7][8][9][10]. However, both approaches have limitations, including environmental concerns and high energy consumption.…”

Section: Introductionmentioning

confidence: 99%

“…Persian Type Culture Collection 2 International depository authority for bacteria, yeast, bacteriophages, plasmids, plant seeds and plant cell tissue cultures3 Technical Rules for Biological Agents (Germany)…”

mentioning

confidence: 99%

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Non‐ureolytic microbially induced carbonate precipitation: Investigating a cleaner biogeotechnical engineering pathway for soil mechanical improvement

Hemayati,

Nematollahi,

Nikooee

et al. 2024

The Journal of Engineering

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As the world's population grows, there is an increasing need for soil improvement techniques to accommodate construction demands. Current methods, most often, suffer from a high CO2 footprint, leading researchers to resort to biological methods of soil improvement through microbially induced carbonate precipitation (MICP). Commonly used ureolytic microbial carbonate precipitation produces ammonium ions, which can be environmentally concerning. The present study, therefore, addresses the use of non‐ureolytic MICP for soil improvement. The process of non‐ureolytic MICP relies on the use of heterotrophic bacteria to catalyze the oxidation reaction of organic compounds, eventually calcium carbonate precipitation. In this study, heterotrophic bacteria, such as Bacillus subtilis and Bacillus amyloliquefaciens, have been investigated as a solution for soil improvement via an ammonium‐free MICP. Calcium formate and calcium acetate are used as both calcium and carbon sources. This study, furthermore, examines the impact of MICP treatment on sandy soil and the effect of compaction level on treated samples. The findings indicate that the non‐ureolytic MICP method is an effective approach for stabilizing sand. The Calcium Formate‐B.Subtilis composition is shown to be the most effective compound for improving the unconfined compressive strength of sandy soils, while the Calcium Acetate‐B.Amyloliquefaciens composition is the least effective.

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Section: Soil Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Non‐ureolytic microbially induced carbonate precipitation: Investigating a cleaner biogeotechnical engineering pathway for soil mechanical improvement

Hemayati,

Nematollahi,

Nikooee

et al. 2024

The Journal of Engineering

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“…In recent years, continuous compaction control technology has appeared in the compaction quality inspection of highway and railway subgrades in China. In well-graded coarsegrained soil or fine-grained soil near the optimal moisture content, there is a good linear correlation between roller measurement values and in situ measurements, and the compaction quality can be detected and controlled by target values, such as compaction meter value, compaction control value, machine drive power, acceleration amplitude, sound compaction value, and compaction value [20][21][22][23][24][25][26]. erefore, IC can quickly monitor the compaction quality based on the measurements of the roller vibration in contact with the ground.…”

Section: Introductionmentioning

confidence: 99%

Compaction Quality Inspection Method of Soil‐Rock Filled Embankment Based on Continuous Compaction Control Technology

Zhang

2021

Advances in Civil Engineering

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Affected by the site construction conditions, the measurement passes of the Taihang Expressway K8 + 105 ∼ K8 + 341 (K8 worksite) in the Taihang Expressway did not meet the requirements of data analysis, and the quantity of the control points was insufficient so that the linear correlation between the dynamic deformation modulus () and the vibratory compaction value (VCV) was not strong. Therefore, the target value of VCV cannot be used to diagnose the E v d compaction quality of soil-rock filler. This paper analyzes the roller measurement VCV value and in situ measurements E v d value separately. Results reveal the difference between the VCV mean measured in the last two passes and the standard deviation of the measured VCV mean in the last pass are used as the main basis for the actual compaction quality. In addition, the E v d mean in the last rolling can be used as an auxiliary judgment basis for the quality control of the compaction.

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“…Past earthquake events have indicated that the excess pore water pressure will accumulate within the saturated sand foundations during earthquake, leading to liquefaction of soil and damaging deformations of buildings (Youd et al 2001, Seed et al 2003, O'Donnell and Kavazanjian 2018. The commonly used treatment methods for liquefiable foundations in engineering include vibro compaction (Duan et al 2019), deep soil mixing (Hasheminezhad and Bahadori 2019), sand compaction piles (Feng et al 2020), stone columns (Pal and Deb 2020), etc.…”

Section: Introductionmentioning

confidence: 99%

In situ desaturation tests by electrolysis for liquefaction mitigation

Chen

Liu

et al. 2021

Can. Geotech. J.

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Electrolytic desaturation is a potential method for improving the liquefaction resistance of the liquefiable foundation by reducing the soil saturation. In this study, in-situ desaturation tests were performed to investigate the resistivity of soil at different depth and the water level of the foundation under different current. The test results show that at constant currents of 1 A (Ampere, unit of the direct current), 2 A and 3 A, the saturation of the treated foundation reached 87%, 83% and 80%. During the electrolysis process, the generated gas migrates vertically and horizontally under the influence of buoyancy and gas pressure. In the end of electrolysis, the gas inside the sand foundation basically migrates vertically only. The higher current intensity employed for electrolysis will affect the uniformity and stability of the gas. At constant currents of 1 A, 2 A and 3 A, the difference between the maximum and minimum degree of saturation in the treated foundation was 14%, 18% and 19%; and after electrolysis halted for 144 h, the saturation in the treated foundation was 90%, 85% and 87%. The electricity consumption analysis indicates that the desaturation method has excellent economic benefits in the treatment of saturated sand foundations.

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Assessment of Ground Improvement by Vibro-compaction Method for Liquefiable Deposits from In-Situ Testing Data

Cited by 22 publications

References 29 publications

Non‐ureolytic microbially induced carbonate precipitation: Investigating a cleaner biogeotechnical engineering pathway for soil mechanical improvement

Non‐ureolytic microbially induced carbonate precipitation: Investigating a cleaner biogeotechnical engineering pathway for soil mechanical improvement

Compaction Quality Inspection Method of Soil‐Rock Filled Embankment Based on Continuous Compaction Control Technology

In situ desaturation tests by electrolysis for liquefaction mitigation

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