NUMERICALLY PREDICTING SETTLEMENTS OF WASTE COCONUT FIBER (WCF) MIXED FLEXIBLE PAVEMENT IN HOMOGENEOUS SANDY SOIL BY USING PLAXIS 3D

Md.Foisal Haque
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Abstract

Surface settlement of flexible pavement in coastal reason occurs for the movement of heavy vehicle, liquefaction of soil layer during seismic shaking, land sliding etc. In coastal area, surface settlement is higher than other geographical area because several sandy layers present in the coastal reason. Surface settlement disturbs the longevity of flexible pavement in homogeneous sandy layer. Waste coconut fiber (WCF), fly ash, coir etc. are suitable additives for reducing such types of settlement. In the present study, numerical analysis performs PLAXIS 3D and various (5, 10, 15, 20, 25) percentages of WCF mix with the asphalt by weight for reducing surface settlement of flexible pavement. Mohr-Coulomb failure criterion uses in the numerical analysis and liquefaction has not considered in the present study. However, WCF increases elastic modulus of flexible pavement and it reduces settlement of the pavement. Minimum surface settlement occurs at the maximum percentage of WCF and it is 1.68mm. Therefore, mixer of WCF protects the flexible pavement against severe damage.
利用plaxis 3d对均质沙土中废椰子纤维混合柔性路面沉降进行数值预测
沿海地区柔性路面的地表沉降主要是由于重型车辆的移动、地震震动时土层的液化、地面滑动等原因造成的。沿海地区由于多砂层的存在,地表沉降比其他地理区域要大。均质砂层中路面沉降对柔性路面寿命的影响。废椰子纤维(WCF)、粉煤灰、椰胶等是减少此类沉降的合适添加剂。在本研究中,数值分析了PLAXIS 3D和不同(5、10、15、20、25)WCF混合料与沥青的重量百分比,以减少柔性路面的表面沉降。数值分析中采用莫尔-库仑破坏准则,未考虑液化问题。而水cf增加了柔性路面的弹性模量,减少了路面的沉降。地表沉降最小值出现在WCF比例最大时,为1.68mm。因此,WCF混合器保护柔性路面免受严重破坏。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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