Experimental Study on the Effect of Compaction Work and Defect on the Strength of Soil‐Rock Mixture Subgrade

Yan, Xin; Zhan, Wei; Hu, Zhijia; Yu, Yiqiang; Xiao, Danqiang

doi:10.1155/2021/5533590

Cited by 3 publications

(5 citation statements)

References 29 publications

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“…It can be observed that the increasing trends for both the physical experiment and numerical simulation results at the same mixing degree index are highly consistent. Although the q/p values in the physical experiments are higher than those in the numerical simulations by approximately 0.6-0.8, the result is acceptable when the shape factor is taken into account [22][23][24][25][26]. This is because the physical experiments used real particles, whose shapes deviate from spherical particles, while the numerical simulations use ideal spherical particles.…”

Section: Specimen's Propertiesmentioning

confidence: 87%

“…(a) Several researchers have focused on the relationship between coarse particle content and shear strength of binary geotechnical mixtures [20][21][22]. The results show that when the coarse particles content of a binary geotechnical mixture is outside the range of 25-75%, the physical and mechanical properties of the binary geotechnical mixture are usually affected by only the fine or coarse particles.…”

Section: Index Of Mixing Degreementioning

confidence: 99%

“…where As is the area enclosed by Line 2 and Line X, and Ai and Aii represent the area of the upper left and lower right rectangles enclosed by Line 1, Line 2 and the coordinate axes, respectively. Several researchers have focused on the relationship between coarse particle content and shear strength of binary geotechnical mixtures [20][21][22]. The results show that when the coarse particles content of a binary geotechnical mixture is outside the range of 25-75%, the physical and mechanical properties of the binary geotechnical mixture are usually affected by only the fine or coarse particles.…”

Section: Index Of Mixing Degreementioning

confidence: 99%

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The Influence of Mixing Degree between Coarse and Fine Particles on the Strength of Offshore and Coast Foundations

Liu

Mohammed

et al. 2022

Sustainability

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The variability in strata of foundation soil in marine environments makes it tedious to design foundations for offshore structures. Hence, it is essential to investigate and evaluate the strength properties of this type of soil. This study investigates the variability of the soil strata (which is quantified by the index of the mixing degree between coarse and fine particles) and its influence on the stability of the soil by mixing coarse and fine particles at varying proportions. A series of discrete element method triaxial shear tests were conducted on binary geotechnical mixtures with a varying proportion of coarse content (25%, 50% and 75%) and different mixing degrees (ranging from 0.0 to 1.0). The macroscopic results show that the peak shear strength increases with an increase in mixing degree, and the increase is more obvious with increasing coarse content, while the critical shear strength is independent of the mixing degree. The main evaluation of the number, mean normal force and distribution of the coarse–fine (cf) contact helps to clarify the meso-mechanisms that result in the variations in peak shear strength and critical shear strength with mixing degree. The increase in the peak strength may primarily be due to the increased number and globalized distribution of coarse–fine contact. However, the decreased contact force of coarse–fine contact counterbalances the strength gain due to the increased number and globalized distribution, which maintain the stability of the critical strength.

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Section: Specimen's Propertiesmentioning

confidence: 87%

Section: Index Of Mixing Degreementioning

confidence: 99%

Section: Index Of Mixing Degreementioning

confidence: 99%

See 1 more Smart Citation

The Influence of Mixing Degree between Coarse and Fine Particles on the Strength of Offshore and Coast Foundations

Liu

Mohammed

et al. 2022

Sustainability

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“…Studies have shown that the optimum moisture content of SRM is generally less than 15%, and gradually decreases with the increase of coarse content [33][34][35]. At the same time, considering the natural moisture content of the SSRM, each SSRM group was proportioned for five different moisture contents (6%, 8%, 10%, 12%, 14%) [24], thoroughly mixed, and blanked for 24 h to maintain consistent internal moisture content.…”

Section: Experimental Schemementioning

confidence: 99%

Fractal Analysis on the Crushing Characteristics of Soil-Soft Rock Mixtures under Compaction

Hu,

Zhang,

Zhu

et al. 2024

Fractal Fract

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Soil-rock mixtures (SRM) are extensively utilized as filling materials in engineering slopes and roadbeds. A comprehensive understanding of the crushing characteristics of SRM during compaction is essential for precisely controlling its mechanical properties, particularly when dealing with SRM comprising soft rock blocks. This study conducted heavy compaction and screening tests to investigate the crushing and compaction behaviors of soil-soft rock mixture (SSRM) with varying coarse particle content (P5 content), the primary focus was primarily on analyzing the double fractal characteristics of coarse and fine particles. The research findings are as follows: with the increase of P5 content, the maximum dry density of SSRM initially rises and then declines, reaching its peak when P5 content is 70%. Soft rock blocks in SSRM exhibit extreme fragility during compaction, the crushing index of coarse particles exhibits a linear increase with the rise in P5 content, whereas the crushing index of fine particles displays a “double peak” characteristic. After compaction, a linear positive correlation is observed between the fractal dimension and the crushing index of coarse and fine particles. With the increase in P5 content, the slope of the relationship curve between the fractal dimension and the crushing index of coarse particles remains relatively constant, while the intercept gradually decreases. Moreover, the fractal dimension of fine particles effectively reflects the compaction characteristics of SSRM, and the relationship between the fractal dimension of fine particles and dry density aligns with the compaction curve of SSRM.

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“…It is often used in conjunction with reinforced materials and is widely used in engineering elds. As a subgrade foundation and abutment foundation in highway and railway engineering [2,3], and in tra c construction, the soil-rock mixture can be reinforced to achieve the purpose of crack resistance of the pavement [4,5]. When replacing and lling the foundation, the soil-rock mixture of natural grading or arti cial grading is often used as replacement lling [6,7].…”

Section: Introductionmentioning

confidence: 99%

Influence of Stone Shape Factor on the Pull-Out Resistance of Geogrid in the Soil-Rock Mixture

Sun

Wang

2022

Advances in Materials Science and Engineering

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In this paper, the particle shape factor of the stone in the soil-rock mixture was used as the specific research object of the geogrid pull-out test, combining the random generation method and evaluation criteria of rock blocks in the soil-rock mixture, and a feasible method for classifying stones according to their shape factors is presented. By comparing the mechanical behavior of soil-rock mixture composed of rock blocks with different rock material shape factors in the geogrid pull-out tests under different working conditions, we studied its changing laws. The research shows that with the increase of the shape factor of the stone, the pull-out resistance of the geogrid gradually decreases. When the stone paved in the model box changes from a single layer to a double layer, the pull-out resistance of the geogrid increases, and there is a disturbance range in the contact interface between the geogrid and the stone; stone blocks 5 cm away from the geogrid surface can still have an indirect effect on the pull-out resistance of geogrids; the pull-out resistance of geogrid in clay is greater than that in the sand; and an empirical expression for predicting the pull-out resistance of geogrids is obtained. This empirical expression helps to explain the influence mechanism of stone shape on drawing resistance of geogrid.

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Experimental Study on the Effect of Compaction Work and Defect on the Strength of Soil‐Rock Mixture Subgrade

Cited by 3 publications

References 29 publications

The Influence of Mixing Degree between Coarse and Fine Particles on the Strength of Offshore and Coast Foundations

The Influence of Mixing Degree between Coarse and Fine Particles on the Strength of Offshore and Coast Foundations

Fractal Analysis on the Crushing Characteristics of Soil-Soft Rock Mixtures under Compaction

Influence of Stone Shape Factor on the Pull-Out Resistance of Geogrid in the Soil-Rock Mixture

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