Experimental study on the reinforcement mechanism and wave thumping resistance of EICP reinforced sand slopes
Sand slope is an important part of coastal zone and islands, which is severely affected by wave erosion and causes problems such as degradation of coastal zone and reduction of island area. Enzyme-induced calcium carbonate precipitation (EICP) technology is a new reinforcement technology with enviro...
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KeAi Communications Co., Ltd.
2023-12-01
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| Series: | Biogeotechnics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949929123000414 |
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| author | Shixia Zhang Zhenyuan Liu Zuoyong Li Danyi Shen Chuangzhou Wu |
| author_facet | Shixia Zhang Zhenyuan Liu Zuoyong Li Danyi Shen Chuangzhou Wu |
| author_sort | Shixia Zhang |
| collection | DOAJ |
| description | Sand slope is an important part of coastal zone and islands, which is severely affected by wave erosion and causes problems such as degradation of coastal zone and reduction of island area. Enzyme-induced calcium carbonate precipitation (EICP) technology is a new reinforcement technology with environmental friendly and excellent effect, which has been widely studied in the field of geotechnical engineering in recent years. In this research, we focus on the coastal or reef sand slopes in marine environments. The EICP reinforcement of representative sand slope units and large scale flume wave thumping experimental study are conducted indoors. By analyzing the physical and mechanical properties, erosion resistance, and microstructure of EICP-reinforced sand slopes, the mechanism of EICP reinforced sand slopes is revealed, the feasibility of EICP reinforced sand slopes is confirmed, and a feasible solution for EICP reinforced sand slopes is finally obtained. Results show that: (1) EICP reinforcement effectively enhances the surface strength and erosion resistance of sand slopes. Higher calcium carbonate content in the sand slopes corresponds to greater surface strength and improved erosion resistance. When the calcium carbonate content is similar, using low-concentration reinforcement twice is more advantageous than using high-concentration reinforcement once due to its superior uniformity. (2) The intensity of waves, the angle of the sand slope, and the severity of erosion damage are interrelated. Higher wave intensity, steeper sand slope angles, and more serious erosion damage require stronger reinforcement measures. (3) Scanning Electron Microscope (SEM) image analysis reveals that the reinforcing effect of sand slopes primarily depends on the amount of calcium carbonate crystals cemented between sand particles. A higher content of calcium carbonate crystals leads to better erosion resistance in the sand slope. |
| format | Article |
| id | doaj-art-6d7c0a0bdf974a4d8ea584bfd0717802 |
| institution | Kabale University |
| issn | 2949-9291 |
| language | English |
| publishDate | 2023-12-01 |
| publisher | KeAi Communications Co., Ltd. |
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| series | Biogeotechnics |
| spelling | doaj-art-6d7c0a0bdf974a4d8ea584bfd07178022025-08-20T03:47:10ZengKeAi Communications Co., Ltd.Biogeotechnics2949-92912023-12-011410004110.1016/j.bgtech.2023.100041Experimental study on the reinforcement mechanism and wave thumping resistance of EICP reinforced sand slopesShixia Zhang0Zhenyuan Liu1Zuoyong Li2Danyi Shen3Chuangzhou Wu4Institute of Port, Coastal and Offshore Engineering, Ocean College, Zhejiang University, Zhoushan 316021, ChinaInstitute of Port, Coastal and Offshore Engineering, Ocean College, Zhejiang University, Zhoushan 316021, ChinaInstitute of Port, Coastal and Offshore Engineering, Ocean College, Zhejiang University, Zhoushan 316021, ChinaInstitute of Port, Coastal and Offshore Engineering, Ocean College, Zhejiang University, Zhoushan 316021, ChinaCorresponding author.; Institute of Port, Coastal and Offshore Engineering, Ocean College, Zhejiang University, Zhoushan 316021, ChinaSand slope is an important part of coastal zone and islands, which is severely affected by wave erosion and causes problems such as degradation of coastal zone and reduction of island area. Enzyme-induced calcium carbonate precipitation (EICP) technology is a new reinforcement technology with environmental friendly and excellent effect, which has been widely studied in the field of geotechnical engineering in recent years. In this research, we focus on the coastal or reef sand slopes in marine environments. The EICP reinforcement of representative sand slope units and large scale flume wave thumping experimental study are conducted indoors. By analyzing the physical and mechanical properties, erosion resistance, and microstructure of EICP-reinforced sand slopes, the mechanism of EICP reinforced sand slopes is revealed, the feasibility of EICP reinforced sand slopes is confirmed, and a feasible solution for EICP reinforced sand slopes is finally obtained. Results show that: (1) EICP reinforcement effectively enhances the surface strength and erosion resistance of sand slopes. Higher calcium carbonate content in the sand slopes corresponds to greater surface strength and improved erosion resistance. When the calcium carbonate content is similar, using low-concentration reinforcement twice is more advantageous than using high-concentration reinforcement once due to its superior uniformity. (2) The intensity of waves, the angle of the sand slope, and the severity of erosion damage are interrelated. Higher wave intensity, steeper sand slope angles, and more serious erosion damage require stronger reinforcement measures. (3) Scanning Electron Microscope (SEM) image analysis reveals that the reinforcing effect of sand slopes primarily depends on the amount of calcium carbonate crystals cemented between sand particles. A higher content of calcium carbonate crystals leads to better erosion resistance in the sand slope.http://www.sciencedirect.com/science/article/pii/S2949929123000414Enzyme induced calcium carbonate precipitation (EICP)Sand slopeWave thumpingErosion resistance |
| spellingShingle | Shixia Zhang Zhenyuan Liu Zuoyong Li Danyi Shen Chuangzhou Wu Experimental study on the reinforcement mechanism and wave thumping resistance of EICP reinforced sand slopes Biogeotechnics Enzyme induced calcium carbonate precipitation (EICP) Sand slope Wave thumping Erosion resistance |
| title | Experimental study on the reinforcement mechanism and wave thumping resistance of EICP reinforced sand slopes |
| title_full | Experimental study on the reinforcement mechanism and wave thumping resistance of EICP reinforced sand slopes |
| title_fullStr | Experimental study on the reinforcement mechanism and wave thumping resistance of EICP reinforced sand slopes |
| title_full_unstemmed | Experimental study on the reinforcement mechanism and wave thumping resistance of EICP reinforced sand slopes |
| title_short | Experimental study on the reinforcement mechanism and wave thumping resistance of EICP reinforced sand slopes |
| title_sort | experimental study on the reinforcement mechanism and wave thumping resistance of eicp reinforced sand slopes |
| topic | Enzyme induced calcium carbonate precipitation (EICP) Sand slope Wave thumping Erosion resistance |
| url | http://www.sciencedirect.com/science/article/pii/S2949929123000414 |
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