Experimental study on the effect of grouting reinforcement on the shear strength of a fractured rock mass

Wang, Cheng; Li, Xuefeng; Xiong, Zuqiang; Cheng-dong, SU

doi:10.1371/journal.pone.0220643

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…The study illustrates that on substitution of cement with 7.9% silica fume, the compressive strength (72.5MPa) has been increased after 28 days on comparison with Portland cement(59.2MPa) with 0.45(w/cm) [27]. The results demonstrate that grouting has a substantial impact on the fractured rock mass of a structural surface's bearing capacity, improved shear strength and deformation resistance by adding novel inorganic dual-liquid grouting material (A is superfine sulphoaluminate cement, B is anhydrite and quick lime) was used to grout prefabricated structural surfaces at 5 different w/c ratios (0.67,0.9,1.1,1.3,1.5) [28]. On combination of nano-silica fume (0.5% and 1%) and metakaolin (10%,20%,30% and 40%) as a GPC (geo polymer concrete).…”

Section: Mechanical Propertiesmentioning

confidence: 99%

A Review on the Utilisation of Silica Fume and Metakaolin as Novel Grout Materials

Sai

Rao

2023

IOP Conf. Ser.: Earth Environ. Sci.

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One of the approaches for solving challenges related to foundations, open cut excavations, landslides, rock slopes, fractured rocks and tunnelling is enhancement of soil via grouting. Two main components of soil enhancement are reduced permeability and increase in strength. To overcome reduced strength and permeability in soils and rock fissures, it has always depended on cement and lime treatment. To replace cement and lime, chemical and ultra-fine cementitious grouts are often employed to break through highly fissured rocks or fine sands. This document gives a censorious evaluation of chosen studies that used unconventional cementitious grouts in order to assist practicing engineers and promote best practice. In sand and cohesive soils, sodium silicate, colloidal silica, metakaolin, silica fume, fly ash, resins, polymers, and microfine substitutes were evaluated as grouting material. The intent of the article is to procure effective data for consultants and contractors who will be building injection works that use non-cementitious fluids in the future.

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Section: Mechanical Propertiesmentioning

confidence: 99%

A Review on the Utilisation of Silica Fume and Metakaolin as Novel Grout Materials

Sai

Rao

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Several researchers have developed various soil improvement techniques to improve soil strength by using different stabilising methods. Several types of soil improvement methods, including grouting, vertical drains, soil replacement, piling, and geosynthetic reinforcement, have been developed to solve the aforementioned soil problems [51][52][53][54]. The polymeric nature of the geosynthetic material makes geosynthetic products durable under different ground and environmental conditions.…”

Section: Mechanism Of Geogrid Reinforcementmentioning

confidence: 99%

Effectiveness of strip footing with geogrid reinforcement for different types of soils in Mosul, Iraq

et al. 2020

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The main cause of problematic soil failure under a certain load is due to low bearing capacity and excessive settlement. With a growing interest in employing shallow foundation to support heavy structures, it is important to study the soil improvement techniques. The technique of using geosynthetic reinforcement is commonly applied over the last few decades. This paper aims to determine the effect of using geogrid Tensar BX1500 on the bearing capacity and settlement of strip footing for different types of soils, namely Al-Hamedat, Ba’shiqah, and Al-Rashidia in Mosul, Iraq. The analysis of reinforced and unreinforced soil foundations was conducted numerically and analytically. A series of conditions were tested by varying the number (N) and the width (b) of the geogrid layers. The results showed that the geogrid could improve the footing’s bearing capacity and reduce settlement. The soil of the Al-Rashidia site was sandy and indicated better improvement than the other two sites’ soils (clayey soils). The optimum geogrid width (b) was five times the footing width (B), while no optimum geogrid number (N) was obtained. Finally, the numerical results of the ultimate bearing capacity were compared with the analytical results, and the comparison showed good agreement between both the analyses and the optimum range published in the literature. The significant findings reveal that the geogrid reinforcement may induce improvement to the soil foundation, however, not directly subject to the width and number of the geogrid alone. The varying soil properties and footing size also contribute to both BCR and SRR values supported by the improvement factor calculations. Hence, the output complemented the benefit of applying reinforced soil foundations effectively.

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“…When drilling and sealing holes, grouting reinforcement technology is mostly used for treatment [6]. The sealing slurry penetrates and diffuses along the cracks around the hole, and cements within the coal to form a consolidated body [7][8][9]. This structure can enhance the compressive strength of the coal body around the hole and improve the sealing effect [10,11].…”

Section: Introductionmentioning

confidence: 99%

Study on the Macro-Micro Mechanical Properties of Grout Consolidated Coal under Different Loading Rates

Pan

Wang

et al. 2022

Materials

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The bore hole is sealed from a sealing hole: the surrounding coal fracture permeability and grout cementation form a new consolidated body and coal material. In this paper, the characteristics of the macroscopic compressive strength, microscopic interface bending, porosity, and fractal dimension of the consolidated body were studied, and the structure strength relationship between loading rates, porosity, fractal dimension, and uniaxial compressive strength (UCS) was established. The results show that the loading rates had a great and consistent effect on the macro- and micro-mechanical properties of the consolidated body. Macroscopically, in the range of 0.1~0.4 mm/min, the UCS and elastic modulus of the solidified body increased with the increase in the loading rate, and there was a critical loading rate (η = 0.4 mm/min). At the microscale, with the increase in loading rates, the interface bending phenomenon, porosity, fractal dimension, and UCS of the grout and coal were consistent, showing a trend of increasing first and then decreasing. The fractal dimension was linearly correlated with the UCS and porosity. The loading rates, porosity, fractal dimension, and UCS had a multivariate nonlinear regression distribution.

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Experimental study on the effect of grouting reinforcement on the shear strength of a fractured rock mass

Cited by 7 publications

References 9 publications

A Review on the Utilisation of Silica Fume and Metakaolin as Novel Grout Materials

A Review on the Utilisation of Silica Fume and Metakaolin as Novel Grout Materials

Effectiveness of strip footing with geogrid reinforcement for different types of soils in Mosul, Iraq

Study on the Macro-Micro Mechanical Properties of Grout Consolidated Coal under Different Loading Rates

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