Field study on performance of jet grouting in low water content clay

Bayesteh, Hamed; Sabermahani, Mohsen

doi:10.1016/j.enggeo.2019.105314

Cited by 30 publications

(8 citation statements)

References 23 publications

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“…This increase in the mixing time of the cement and soil constructs a more homogenous specimen with fewer clayey clods at the core. In the case of unavailability of a weak failure path during unconfined compression testing, the strength of the soilcement increased as the lifting step of the drill stem decreased and the time interval per step increased [40]. Tadio (2016) [41] reported that the compressive strength increased with…”

Section: Compressive Strength Index In Natural Conditionsmentioning

confidence: 99%

An Investigation of Geomechanical and Microstructural Properties of Full-Scale Jet Grout Column Constructed in Organic Soil

Çanakçı

2021

Arab J Sci Eng

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Jet grouting methods have recently become one of the soil enhancement technologies utilized to provide strength improvement and solve most problems of weak soils. In this study, a full-scale 1 m diameter and 5 m length jet grout (soilcrete) column was constructed in the field with a water-to-cement ratio of 1 and 400 bar pressure injections. A mechanical, physical, and microstructural investigation was performed on jet grout samples taken from six different depths (0.0, 0.5, 1.0, 1.5, 2.0, and 2.5 m) and at the same depth at five different locations, including the center. For normal conditions, samples were prepared for six periods to study dry and saturated conditions. The following tests are performed on each sample: compressive strength index (I s ) in all conditions, water absorption, density, porosity, and interface friction. Additionally, SEM was performed on selected samples to investigate the microstructures of jet grout columns (JGCs). The test results showed that the I s varies with depth, and within the same depth, the variation is approximately 20%. Other properties also vary with depth and location; for example, the average percentage of water absorption and porosity are considered minimum values at the same location, which are 53 and 30%, respectively. However, the interface friction angle of organic soil-cement grout gains 48°and 10 kPa cohesion. The theoretical part of this study is to predict the diameter of JGC in organic soil.

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Section: Compressive Strength Index In Natural Conditionsmentioning

confidence: 99%

An Investigation of Geomechanical and Microstructural Properties of Full-Scale Jet Grout Column Constructed in Organic Soil

Çanakçı

2021

Arab J Sci Eng

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“…e mechanism of grouting alters the pore structure of the soil body, so completely different properties are exhibited. In [5], the micromechanism of jet grouting on the soil body with different pore structures (coarse-grained soil, silt, low-water clay, and saturated clay) includes 4 types: seepage, erosion, erosion splitting, and splitting. However, the above classification is based on jet grouting, and the mechanism of action on the soil body will not change significantly under high pressure even if the grouting pressure is altered.…”

Section: Analysis Of Micromechanism Of Groutingmentioning

confidence: 99%

“…However, because of its rapid reaction and easy expansion properties, its permeation process during the splitting is not obvious [26]. Cement soil mixing piles [5] and high-pressure jet grouting can be defined as complete splitting type.…”

Section: Analysis Of Micromechanism Of Groutingmentioning

confidence: 99%

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An Experimental Study on the Reinforcement of Silt with Permeable Polyurethane by Penetration Grouting

Wang

Liu

Guo

et al. 2020

Advances in Civil Engineering

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To meet the demand of antiseepage and reinforcement of soil dams, a kind of permeable polyurethane grouting material was developed. A visual steady-pressure grouting test device was designed to study the law of polyurethane diffusion and reinforcement in silt under different pressure, and the interaction mechanism of grout and soil body structure was explored microscopically. The results showed that, with the increase in the grouting pressure, the diffusion speed rose, and the diffusion pattern of grout in the soil also changed from permeation diffusion to permeation splitting. Under the effect of grouting pressure, more tiny cracks will occur in the soil structure, leading to the use of more grout, thus increasing the strength of the consolidated soil by more than 10 times. The results of SEM-EDS and mercury intrusion test proved that the polyurethane had a significant filling effect on the soil structure, which could effectively reduce the porosity of the soil and cement the soil particles through wrapping, complexing, and hydrogen bonding, thereby improving the soil properties. Moreover, the results revealed from a microscopic perspective that the grouting altered the pore structure of the soil structure through the seepage-erosion-splitting coupling effect, but when the grouting pressure exceeded 0.4 MPa, the soil particle and grout would be partially remixed and arranged closely, showing a phenomenon of jet grouting. Finally, the material was used in engineering practice, achieving a satisfactory grouting treatment effect.

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“…The law of slurry flowing and solidification is of great significance to engineering design and construction 10–12 . At present, there are a large number of grouting theories for the prevention and control of water damage in underground engineering, 13 mainly including seepage grouting theory, 14–15 fracture rock grouting theory, 16 split grouting theory, 17 and compaction grouting theory 18 . However, at present, the theoretical research on grouting in flowing water is relatively sparse.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of flow control technology for grouting and blocking of flowing water in karst conduits

Pan

Lin

et al. 2021

Num Anal Meth Geomechanics

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A sequential flow and solidification method was applied to the numerical investigation of flow control technology for grouting and blocking of flowing water in karst conduits. This method accounted for the temporal‐ and spatial‐evolution characteristics of the viscosity. It achieved the visualization of grouting in flowing water in a conduit, and was used to explore a reasonable and effective method for grouting through flow‐control technology. Firstly, the responses of different water tables and flow‐control intensities were studied by establishing a generalized model of flow control at the outlet of a conduit. Secondly, the initial sedimentation location and the distance of down‐flow and counter‐flow of slurries with different intensities of flow control were compared and analyzed. The outlet flow, the loss rate of the slurry, and the distribution laws of velocity and pressure inside the conduit during plugging were further analyzed. In addition, the mechanism of flow control for the grouting and plugging of large‐flow conduits was revealed. The results showed that the most direct effect of flow control on grouting was to decrease the flow rate of flowing water, and the most essential role was to improve the retention rate of slurry. Moreover, the results were applied to the large‐scale water inrush control project of Hejing Limestone Mine, China. The slurry stop devices improved the retention rate of slurry and optimized the grouting technology, which had a certain guiding significance in the treatment of water‐inrush disasters in karst areas.

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Field study on performance of jet grouting in low water content clay

Cited by 30 publications

References 23 publications

An Investigation of Geomechanical and Microstructural Properties of Full-Scale Jet Grout Column Constructed in Organic Soil

An Investigation of Geomechanical and Microstructural Properties of Full-Scale Jet Grout Column Constructed in Organic Soil

An Experimental Study on the Reinforcement of Silt with Permeable Polyurethane by Penetration Grouting

Numerical investigation of flow control technology for grouting and blocking of flowing water in karst conduits

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