The influence of the degree of saturation on compaction-grouted soil nails in sand

Xinyu, Ye; Wang, Shanyong; Wang, Qiong; Sloan, Scott W.; Sheng, Daichao

doi:10.1007/s11440-018-0706-x

Cited by 24 publications

(4 citation statements)

References 22 publications

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“…To replicate backfill conditions commonly encountered in the field, an artificial sandy loam-Kaolin mixture was used in this study. Ye et al [40] used sandy loam from the same commercial source and found that moisture uniformity would be affected under the influence of gravity when the degree of saturation was higher than 20%, due to its relatively low water retention capacity. As such, 20% by mass Q38 Kaolin was mixed with 80% sandy loam to increase the water retention capacity of the backfill.…”

Section: Materials Testedmentioning

confidence: 99%

Suction effects during uplift of steel pipes buried in compacted soil

Kouretzis

Pineda

et al. 2022

Acta Geotech.

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This paper presents an experimental study on quantifying the effects of soil suction on the resistance offered by compacted unsaturated backfills to uplift of buried steel pipes and identifying the mechanisms that contribute to increased resistance compared to similar pipes buried in dry sand. This is achieved by means of 1-g physical model experiments, with the pipe buried in sandy loam–Kaolin soil beds of varying water content (suction), compacted to the same dry unit weight. The main experiments are supplemented by benchmarking experiments performed in dry sand of similar grain size distribution, as well as in compacted soil beds inundated with water to achieve conditions close to full saturation. The experiments are supported by a detailed characterisation study of compacted sandy loam–Kaolin mixtures and mini-CPT tests performed to evaluate the uniformity of the soil beds. Measurements of the reaction developing on the pipe as function of its uplift displacement are co-evaluated together with images of the failure mechanisms obtained using particle image velocimetry and continuous measurements of soil matrix suction. We conclude with a simplified method to predict the peak reaction to pipe uplift that allows considering the contribution of suction and the tensile–shear failure mechanism observed during the experiments.

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Section: Materials Testedmentioning

confidence: 99%

Suction effects during uplift of steel pipes buried in compacted soil

Kouretzis

Pineda

et al. 2022

Acta Geotech.

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“…The soil porosity (n) is the proportion of pore space of soil contained in a volume of soil that can be occupied by water and air and computed using the equation explained in NIMMO [2004]. The degree of saturation (S) is the ratio between the air volume (V w ) to the volume of voids of the soil (V v ) and is determined using the equation mentioned in YE et al [2018].…”

Section: Laboratory Analysismentioning

confidence: 99%

Journal of Water and Land Development

Harisuseno,

Cahya

2020

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Infiltration process plays important role in water balance concept particularly in runoff analysis, groundwater recharged, and water conservation. Hence, increasing knowledge concerning infiltration process becomes essential for water manager to gain an effective solution to water resources problems. This study employed multiple linear regression for estimating infiltration rate where the soil properties used as the predictor variable and measured infiltration rate as the response variable. Field measurement was conducted at sixteen points to obtain infiltration rate using double ring infiltrometer and soil properties namely soil porosity, silt, clay, sand content, degree of saturation, and water content. The result showed that measured infiltration rate had an average initial infiltration rate (f 0 ) of 6.92 mm•min -1 and final infiltration rate (f c ) of 1.49 mm•min -1 . Soil porosity and sand content showed a positive correlation with infiltration rate by 0.842, 0.639, respectively, while silt, clay, water content, and degree of saturation exhibited a negative correlation by -0.631, -0.743, -0.66 and -0.49, respectively. Three types of regression equations were established based on type of soil properties used as predictor variables. The model performance analysis was conducted for each equation and the result shows that the equation with five predictor variables f MLR_3 = -62.014 + 1.142 soil porosity -0.205 clay, -0.063 sand -0.301, silt + 0.07 soil water content with R 2 (0.87) and Nash-Sutcliffe (0.998) gave the best result for estimating infiltration rate. The study found that soil porosity contributes mostly to the regression equation that indicates great influence in controlling soil infiltration behavior.

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“…On this basis, Wang et al investigated the effects of w/c ratio and soil saturation on the grout diffusion pattern in sandy soil under pressure grouting conditions [24]. The experiments performed by Ye et al further demonstrated that the initial soil saturation significantly affected the injectability of sandy soil, and thus the formation of grout bubbles [25]. Practical experiences indicate that the fracture-compaction grouting pattern plays an important role in sand grouting engineering [26].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Grout–Soil Interaction Effects in Sandy Soil under Different Water-to-Cement Ratios

Hu,

Lu,

Deng

et al. 2024

Buildings

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Due to the unique characteristics of sandy soil layers, there is often a coupling effect of multiple grout diffusion patterns in the grouting process, and different slurry diffusion modes may lead to different responses of soil structures. In this study, laboratory grouting model tests were conducted with homogeneous sand under different water-to-cement (w/c) ratios to reveal the temporal variations in grouting pressure, soil stress fields, and displacement fields during the grout diffusion process. The results show that, during the grouting process in the fine sand layer, the grout mainly exhibited a compaction–splitting diffusion mode. The farther away from the grouting center, the more pronounced the hysteresis effect of soil pressure caused by grout diffusion. Meanwhile, as the w/c ratio increased, the diffusion mode between the slurry and the soil was in a transitional state. At w/c > 1.2, the primary pattern changed from the fracture–compaction pattern to the permeation–fracture–compaction pattern and fracture–permeation pattern. And the overall trend of the grouting pressure curve was similar under all of the w/c ratio conditions, showing a trend of increasing to the maximum value of the pressure first and then decreasing. With the increase in the water–cement ratio, the overall value of the grouting pressure curve showed a decreasing trend, the pressure value increased more slowly with time before reaching the maximum value, and the more obvious the influence of water–cement ratio was when w/c > 1.2. Additionally, the surface displacement also exhibited an overall decreasing trend, and it had no obvious lifting value under the condition of w/c = 1.6.

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The influence of the degree of saturation on compaction-grouted soil nails in sand

Cited by 24 publications

References 22 publications

Suction effects during uplift of steel pipes buried in compacted soil

Suction effects during uplift of steel pipes buried in compacted soil

Journal of Water and Land Development

Experimental Study on Grout–Soil Interaction Effects in Sandy Soil under Different Water-to-Cement Ratios

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