Performance of Footing on MICP Induced Slope

Pusadkar, S. S.; Tawalare, Rewati N.; Dhatrak, A. I.

doi:10.9790/1684-140306100105

Cited by 3 publications

(3 citation statements)

References 4 publications

(1 reference statement)

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“…This group of experiments were examined for the different hillside slopes of 5 • , 10 • , 20 • , one-hour constant rainfall, rainfall intensity of 41 (mm/h) and 66 (mm/h) to discuss the soil erosion differences between the control group (non-solidification) and the test group (solidification), which Tables 6 and 7 show. The results with a bearing capacity of footing on slope of 1.5H:1V (33.69 • ) have significantly increased after MICP treatment based on Pusadkar et al (2017) [38]. Moreover, the results thatwere proposed by Shao et al (2017) for applying MICP technology on silt slope anti-erosion provide valuable enlightenments [34].…”

Section: Slope and Erosionmentioning

confidence: 99%

Applying Biomineralization Technology to Study the Effects of Rainfall Induced Soil Erosion

Shih

Lai

Hsu

2019

Water

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The rainless days and drought seasons reveal a tendency to lengthen the wet and dry period in recent years in Taiwan. In the bare riverbeds in central Taiwan, such as the Dajia and Zhuoshui rivers, fugitive dust is the common problem during the winter’s dry period with northeast monsoon. The study aims to use the biological method, Microbial-induced carbonate precipitation (MICP), to solidify the soil and implement a series of rainfall simulator experiments to reduce the Aeolian dust emission problems. Accordingly, the relationship between rainfall-induced soil erosion and its soil specimens are also discussed. The soil conducted the MICP for seven days as the curing age, and then be analyzed the degree of soil solidification under different conditions, rainfall intensity of 41 mm/h and 61 mm/h by the soil erosion experiment. The effect of soil solidification with various relative density of soils of 60%, 70%, and 80%, and hillside slopes of 5°, 10°, 20° were tested. The result indicated that, the higher the relative density of soils, the better the effect of soil solidification would be. The relative density of soils from 60% to 80% all kept the effect of soil solidification as applying to MICP. Therefore, it was important to select the curing age with the matching relative density of soils. Moreover, the most appropriate condition for the effects of soil solidification by MICP was the slopes below 10° and the curing age for seven days. The effect of soil solidification was still preserved in that with the high intensity rainfall (66 mm/h) due to the Aeolian dust emission commonly happening in the bare riverbeds with mild slopes.

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Section: Slope and Erosionmentioning

confidence: 99%

Applying Biomineralization Technology to Study the Effects of Rainfall Induced Soil Erosion

Shih

Lai

Hsu

2019

Water

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“…In order to reduce the discharge rate (the ratio of the OD600 value of the discharged bacterial liquid to the OD600 value of the inoculated bacterial liquid) of bacterial liquid from the sand column, CaCl 2 was chosen as the fixative solution. According to related references [9,13], the higher the concentration of the fixative solution was, the lower the discharge rate of the bacterial liquid was. But under a certain concentration of CaCl 2 , the inoculated bacterial liquid will form the floccules, and its diameter sizes enlarged with the increasing concentration of CaCl 2 and blocked the pores between the uranium tailings, resulting in nonuniform distribution of bacterial liquid and unstable transmission of cement solution in the sand column.…”

Section: Fixative Solution and Cement Solutionmentioning

confidence: 99%

“…e uniaxial compressive strength of reinforced piles was up to 8.9 MPa-2.3 GPa [12]. Pusadkar et al reinforced the sand slop in the laboratory by injecting bacteria (S. Pasteurii) and cement solution in sand, and the bearing capacity of slope footing increased significantly after MICP treatment [13]. Grabiec et al applied the MICP technology to reinforce the incompletely compacted silty clays, and found that MICP technology can make diagenesis in the silty clays and significantly improve the soil stiffness [14].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Fine-Grained Uranium Tailings Reinforced by MICP

Gui

Pan

Ding

et al. 2018

Advances in Civil Engineering

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Sporosarcina Pasteurii was chosen for the experiment to study the effect and mechanism of fine-grained uranium tailings reinforced by MICP. The biochemical characteristics of strains and microbial immobilization in uranium tailings were analyzed. The results showed that the CaCO3 production rate is positively correlated with the physiological activity of Sporosarcina Pasteurii and the concentration of calcium sources, and the higher the solution concentration of CaCl2, the lower the discharge rate of bacterial liquid from the sand column, but high concentration of CaCl2 solution will affect the uniform distribution and migration of bacteria in the uranium tailings. After 16 days, the direct shear was used to test the reinforcement effects of fine-grained uranium tailings by MICP. The cohesive force and the internal friction angle of fine-grained uranium tailings were increased by 140.1% and 46.7%. The production amount of CaCO3 is 138.89 kg/m3. The results showed that the MICP-reinforced technology can effectively improve the shear strength of the uranium tailings, and the experiment provides a new method for the reinforcement of the fine-grained uranium tailings dam.

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Experiment on microbial grouting reinforcement of tailings under the regulation of egg white

Zheng

Tong

et al. 2020

Soils and Foundations

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Performance of Footing on MICP Induced Slope

Cited by 3 publications

References 4 publications

Applying Biomineralization Technology to Study the Effects of Rainfall Induced Soil Erosion

Applying Biomineralization Technology to Study the Effects of Rainfall Induced Soil Erosion

Experimental Study on the Fine-Grained Uranium Tailings Reinforced by MICP

Experiment on microbial grouting reinforcement of tailings under the regulation of egg white

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