Triaxial Compression Test on Consolidated Undrained Shear Strength Characteristics of Fiber Reinforced Soil

Hou, Tian-shun; Liu, Jianlong; Luo, Yi; Cui, Yi-xiang

doi:10.28927/sr.431043

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…Figure 4 shows the stress–strain curves of BFR loess with w of 9% and FL of 4 mm, 8 mm, 12 mm, and 16 mm. The peak strength increased with increasing σ 3 , indicating that the strength enhanced with embed depth, which is consistent with the results of the reference 47 . The BFR loess with FL and FC were 4 mm and 0.2%, the peak strength increased by 61.70% and 173.81% under 50 kPa and 100 kPa σ 3 , compared to that under 25 kPa σ 3 .…”

Section: Resultssupporting

confidence: 91%

Shear strength characteristics of basalt fiber-reinforced loess

Chen,

Li,

Liu

et al. 2023

Sci Rep

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Loess owns the characteristics of collapsibility, disintegration and solubility, which pose a challenge to engineering construction. To examine the shear strength of basalt fiber-reinforced (BFR) loess, consolidated undrained (CU) triaxial tests were conducted to explore the impacts of water content (w), fiber length (FL), fiber content (FC) and cell pressure (σ3) on the shear strength. According to the results, the shear strength model was established taken into account the impacts of FL, FC, and fiber diameter (d). The results showed that the peak strength of BFR soils enhanced as FL, FC, and σ3 increasing, whereas it decreased with increasing of w. Compared to unreinforced soil, the peak strength of BFR loess improved 64.60% when FC was 0.2% and FL was 16 mm. The optimum reinforcement condition for experimental loess was that of FL was 16 mm and FC was 0.8%. The reinforcing mechanism of fibers was divided into a single tensile effect and spatial mesh effect. The experimental and calculated results agreed well, which suggested the model is suitable for predicting the shear strength of BFR loess. The research results can offer a guideline for the application of BFR loess in the subgrade and slope engineering.

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Section: Resultssupporting

confidence: 91%

Shear strength characteristics of basalt fiber-reinforced loess

Chen,

Li,

Liu

et al. 2023

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Figure 4 shows the stress-strain curves of BFR loess with w of 9% and FL of 4 mm, 8 mm, 12 mm, and 16 mm. The peak strength increased with increasing σ 3 , indicating that the strength enhanced with embed depth, which is consistent with the results of the reference 24 . The BFR loess with FL and FC were 4 mm and 0.2%, the peak strength increased by 59.84 kPa and 168.58 kPa under 50 kPa and 100 kPa σ 3 , compared to that under 25 kPa σ 3 .…”

Section: Stress-strain Curves Of Bfr Loesssupporting

confidence: 91%

Shear strength characteristics of basalt fiber-reinforced loess: experimental investigation and model prediction

Chen

Liu

et al. 2023

Preprint

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Loess owns the characteristics of collapsibility, disintegration and solubility, which pose a challenge to engineering construction. To examine the shear strength of basalt fiber-reinforced (BFR) loess, consolidated undrained (CU) triaxial tests were conducted to explore the impacts of water content (w), fiber length (FL), fiber content (FC) and cell pressure (σ3) on the shear strength. The microstructure of reinforced loess was constructed using SEM measurements to reveal the reinforcing mechanism of basalt fibers. According to the results, the shear strength model was established taken into account the impacts of FL, FC, and fiber diameter (d) using the regression analysis method. The results showed that the peak strength of BFR soils enhanced as FL, FC, and σ3 increasing, whereas it decreased with increasing of w. The reinforcing mechanism of fibers was divided into a single tensile effect and spatial mesh effect, and the bridging effect transformed the force, which improved the overall ability of composites to resist deformation and damage. The experimental and calculated results agreed well, which suggested the model is suitable for predicting the shear strength of BFR loess. The research results can offer a guideline for the application of BFR loess in the subgrade and slope engineering.

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“…The technique of soil mechanical stabilization with fibers can be used in retaining structures, subgrade and subbases pavement layers, slope stability, soft soil embankments, soil hydraulic conductivity control, erosion improvement, piping prevention (Shukla, 2017;Tang et al, 2007;Ziegler et al, 1998) and shrinkage cracks mitigation (Ehrlich et al, 2019). According to Hou et al (2020), as the global community is turning to a more sustainable way of development, engineers are encouraged to use stabilization technologies that can replace or minimize the use of traditional cement and other curing agents.…”

Section: Introductionmentioning

confidence: 99%

Reinforcing effect of recycled polypropylene fibers on a clayey lateritic soil in different compaction degrees

Correia¹,

Rocha²

2021

S&R

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The present research investigates the reinforcing effect of recycled polypropylene (R-PP) fibers on a compacted clayey lateritic soil in different compaction degrees. R-PP fibers of 12 mm length were mixed with the soil in the contents of 0.1 and 0.25% of soil dry weight. Unconfined compression strength tests (UCS), direct shear tests and indirect tensile strength (ITS) tests were conducted. Fibers addition showed no significate alterations in the optimum compaction parameters. The study evidenced increases in UCS, changing the soil behavior from a brittle failure to a ductile failure, while fiber contribution was most effective for 0.25% R-PP fibers content and 95% compaction degree. The use of fibers improved the shear stress-strain behavior of the composites and soils compacted at different degrees of compaction showed similar shear behavior, which is coherent to the soil water retention curves (SWRC) results. Significant increases in the tensile behavior of soil-mixtures for both fiber contents used were observed, and fibers increase was more significate than increase in soil degree of compaction. The stretching of the fibers and fibers orientation at the sheared interface in direct shear tests and the fiber “bridge” effect in ITS tests could be observed.

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Triaxial Compression Test on Consolidated Undrained Shear Strength Characteristics of Fiber Reinforced Soil

Cited by 4 publications

References 16 publications

Shear strength characteristics of basalt fiber-reinforced loess

Shear strength characteristics of basalt fiber-reinforced loess

Shear strength characteristics of basalt fiber-reinforced loess: experimental investigation and model prediction

Reinforcing effect of recycled polypropylene fibers on a clayey lateritic soil in different compaction degrees

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