Surficial Failure of Expansive Soil Cutting Slope and Its Flexible Support Treatment Technology

Xiao, Jie; Yang, Heping; Zhang, Junhui; Tang, Xianyuan

doi:10.1155/2018/1609608

Cited by 24 publications

(12 citation statements)

References 29 publications

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“…In recent decades, geosynthetic-reinforced soil (GRS) structures have been constructed more frequently, such as subgrade [1,2], embankment [3,4], retaining walls [5][6][7], slopes [8,9], and landfills [10,11], because they have the advantages of low cost [12], simple construction, and environmental protection [8,13] and can deform without damage. High-density polyethylene (HDPE) geogrids, as an example of the important geosynthetics reinforcement materials, are commonly adopted in many GRS structures, such as reinforced soil retaining wall and reinforced slopes, especially for steep slopes [14][15][16], because of their excellent mechanical characteristics such as high strength, high elongation, and durability.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Pullout Behavior of HDPE Geogrid under Static and Dynamic Loading

Zuo

Yang

et al. 2020

Advances in Materials Science and Engineering

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This paper describes a series of laboratory pullout tests that were performed to investigate the pullout behavior of high-density polyethylene (HDPE) uniaxial geogrid subjected to static and dynamic loading. Pullout tests were conducted on HDPE geogrid reinforced coarse sand under normal static loading (60–300 kPa), dynamic loading with different amplitudes (20, 40, and 60 kPa), and different frequencies (2, 4, and 6 Hz) by using the newly developed pullout apparatus. The results indicated that the pullout resistance of geogrid presented different growth patterns with the increase of normal loads under static loading. The amplitude and frequency both had significant effects on the interaction between reinforcement and soil, and the increment of the pullout resistance was 0.6 kN and 0.3 kN, respectively. The effect of dynamic loading on the soil-geogrid interface can be gradually equivalent to that of static loading corresponding to the balance position of dynamic loading with the increase of frequency compared with the static loading. The results of this study are helpful for the selection of the strength of the reinforcement in different locations and to simplify the study on the stress of reinforcement in reinforced soil structures under traffic loads.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Pullout Behavior of HDPE Geogrid under Static and Dynamic Loading

Zuo

Yang

et al. 2020

Advances in Materials Science and Engineering

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“…Table 2 summarizes the results for laboratory testing. Since the MBV of the soil samples S13 and S14 is larger than 60 mg/g, it was measured by the traditional method [19,20].…”

Section: Methodsmentioning

confidence: 99%

“…It should be noted that the method using the methylene blue solution with a colorimeter is not suitable for soils in the case that the MBV is larger than 60 mg/g. For this case, the traditional method to measure the MBV should be adopted [19,20].…”

Section: Laboratory Experimentsmentioning

confidence: 99%

Estimation of Soil‐Water Characteristic Curve for Cohesive Soils with Methylene Blue Value

Zhang

Peng

Chen³

et al. 2018

Advances in Civil Engineering

Self Cite

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This study described a new methylene blue test to measure the methylene blue value (MBV) for 15 cohesive soils and established the relationship between MBV and plasticity index (PI) and between MBV and percent passing No. 200 sieve (P200), respectively. Thereafter, the soil-water characteristic curves (SWCCs) for 15 cohesive soils based on Fredlund and Xing’s model were generated by the pressure plate test. Then, regression equations for determining the four fitting parameters in a previously developed SWCC equation by using the measured MBV were utilized to generate the SWCC for the cohesive soils. At the same time, the slope parameter, bf, in the SWCC equations was found to be associated with the moisture susceptibility of cohesive soils. A higher bf value indicates that the material is more moisture susceptible. In addition, a lower MBV/PI/P200 shows a lower suction at the same degree of saturation; on the other hand, a higher MBV/PI/P200 presents a higher suction. Therefore, the moisture-holding capacity of cohesive soils increases with increasing MBV, PI, and P200. Finally, the proposed estimation method was validated by a comparison between the four determined fitting parameters from MBV and the pressure plate test.

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“…However, in Loess Plateau area of China, for the special climatic conditions of this area, many loess slope spalling hazards often induced by the process of dry-wet cycle [12][13][14][15]. According to the previous research, the process of drywet cycle can significantly alter the soil moisture distribution and hydro-mechanical behavior, and therefore affect soil performances in various geotechnical applications.…”

Section: Figure 1 Loess Slope Spalling Hazards In Loess Area Of Chinamentioning

confidence: 99%

Effect of Dry-wet Cycle on the Formation of Loess Slope Spalling Hazards

Zhang

2018

CivileJournal

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This paper investigates the effect of dry-wet cycle process on the formation of loess slope spalling hazards. Based on the CT scan tests and macroscopic fissures analysis, the fissure variation law of loess samples under different dry-wet cycle times were determined. Through the laboratory direct shear tests, the variation law of shear strength, cohesion and angle of internal friction of loess samples under different dry-wet cycle times and different dry-wet cycle water content variation ranges were discussed. The results show that the natural water contents of Luo-chuan loess were higher than Tong-chuan loess due to it’s higher contents of clay particles. With the increase of dry-wet cycle times, the internal fissure numbers of loess samples increased dramatically. The value of shear strength and cohesion of loess samples in two different areas decreased dramatically due to the increase of dry-wet cycle times. Higher water content variation ranges of dry-wet cycles leaded to lower shear strength of loess samples under the same dry-wet cycle times. Loess slope spalling hazards often happened due to the decrease of shear strength and the occurrence of internal fissures in loess induced by the dry-wet cycle process.

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Surficial Failure of Expansive Soil Cutting Slope and Its Flexible Support Treatment Technology

Cited by 24 publications

References 29 publications

Experimental Investigations on Pullout Behavior of HDPE Geogrid under Static and Dynamic Loading

Experimental Investigations on Pullout Behavior of HDPE Geogrid under Static and Dynamic Loading

Estimation of Soil‐Water Characteristic Curve for Cohesive Soils with Methylene Blue Value

Effect of Dry-wet Cycle on the Formation of Loess Slope Spalling Hazards

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