Calculation of horizontal displacement of loess fill slope supported by frame prestressed anchors based on minimum potential energy method

Zhao, Zhuangfu; Zhu, Yanpeng; Ye, Shuaihua

doi:10.1038/s41598-022-15473-3

Cited by 2 publications

(1 citation statement)

References 19 publications

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“…Another example is the loess landslide caused by concentrated rainstorms in Bailuyuan, Shanxi Province, in September 2011, leading to 32 deaths and 5 missing people [9]. A series of traditional treatment measures, such as supporting structure, ecological intervention, and cement grouting, is widely used in loess slope engineering to alleviate the instability of slopes [10][11][12]. However, these treatments do not solve the problem of surface erosion and normally have limitations in convenience, effectiveness, and environmental protection.…”

Section: Introductionmentioning

confidence: 99%

Reinforcement Mechanism and Erosion Resistance of Loess Slope Using Enzyme Induced Calcite Precipitation Technique

et al. 2023

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The disaster of loess slope seriously threatened the safety of people and property. Enzyme Induced Calcite Precipitation (EICP) was demonstrated as an environmentally friendly soil improvement method. However, few studies have focused on the improvement effect of EICP on loess slopes. In this study, a series of tests were conducted to investigate the effect of EICP and added either basalt fiber (BF) to the loess or polyvinyl acetate emulsion (PVAC) to the solution on the erosion resistance of loess slopes. The results showed that all of the EICP, EICP-BF, and EICP-PVAC treatments could improve surface strength (SS). The addition of 50 g/L PVAC achieved high SS because the network structure formed by PVAC promoted the affixation of CaCO3. The thickness of the crust layer decreased with the increasing BF content or PVAC concentration. With the increasing number of EICP treatment cycles, the CaCO3 content increased progressively, but the increase rate decreased. For rainfall erosion, the time until erosion occurred was delayed and the stability was improved for loess slopes treated with EICP, EICP-BF, and EICP-PVAC. The high erosion resistance of loess slopes treated with EICP-0.5% BF, EICP-30 g/L PVAC, and EICP-50 g/L PVAC was attributed to the stable spatial structure formed by CaCO3 precipitation and the additional cementation provided by high BF content and PVAC concentration. The addition of 0.5% BF effectively inhibited the development of surface cracks in loess slope after dry–wet cycles. With the increasing number of dry–wet cycles, the accumulative loess loss weight of slopes treated with various methods increased gradually. Among all treatment methods, the number of dry–wet cycles had less effect on EICP-30 g/L PVAC treated loess slopes. This study provided guidance for loess slopes prevention.

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