Effect of Bio-Cementation Level and Rainfall Intensity on Surface Erosion Resistance of Biotreated Slope Using PEICP Method
Yuyuan Chen, Hemanta Hazarika, Nadella Marchelina
TL;DR
This study shows that using a plant-based enzyme method to strengthen soil can significantly reduce erosion from rainfall on slopes.
Contribution
The study introduces the use of PEICP for slope erosion control and quantifies its effectiveness under varying rainfall intensities.
Findings
Increasing biotreatment cycles improved surface strength and calcium carbonate content, enhancing erosion resistance.
Slopes treated with six cycles showed near-complete erosion resistance at high rainfall intensities.
Biotreated slopes reduced soil loss to below 10% with four treatment cycles.
Abstract
Biomineralization technology is a promising method for soil cementation, enhancing its mechanical properties. However, its application in mitigating slope surface erosion caused by rainfall has not been fully explored. This study experimentally examined the feasibility of using plant-based enzyme-induced carbonate precipitation (PEICP) to reduce slope surface rainfall erosion through simulated rainfall tests. The effects of biotreatment cycles (N) and rainfall intensity (Ri) on erosion resistance were evaluated. The results demonstrated that increasing the biotreatment cycles improved the bio-cementation level, as evidenced by enhanced surface strength, increased calcium carbonate content (CCC) and thicker crust layers. Specifically, as the biotreatment cycles (N) increased from 2 to 6, the crust layer thickness expanded from 5.2 mm to 15.7 mm, with surface strength rising from 38.3 kPa…
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Taxonomy
TopicsMicrobial Applications in Construction Materials · Grouting, Rheology, and Soil Mechanics · Geotechnical Engineering and Soil Stabilization