工程地质学报2024，Vol.32Issue(1)：28-38,11.DOI:10.13544/j.cnki.jeg.2022-0032
剑麻纤维-聚丙烯酰胺改良客土干缩开裂试验研究
EXPERIMENTAL STUDY ON DRY SHRINKAGE CRACKING OF SISAL FI-BER-POLYACRYLAMIDE MODIFIED EXTERNAL SOIL
摘要
Abstract
The number of exposed rock slopes gradually increases with the scale and number of infrastructure con-struction.As an effective slope protection and greening technology,guest soil spraying technology can enhance the surface stability of rock slopes.However,various factors contribute to water loss and cracking of the surface soil,which can impact the repair effectiveness of guest soil spraying.To address this issue,sisal fiber and polyacrylamide(PAM)are utilized to enhance the external soil in this paper.Dry shrinkage cracking tests were conducted under different conditions,including varying thickness,sisal fiber content,and polyacrylamide(PAM)content.The effects of these different conditions on soil drying,water loss,and surface crack development were studied.The in-ternal structural changes of the improved external soil were discussed and analyzed using scanning electron micros-copy(SEM).The results indicate that,with the increase in soil layer thickness,the evaporation stability time of the improved soil is prolonged,effectively inhibiting the development of surface cracks.The addition of sisal fiber and PAM extends the evaporation path of clay,leading to a gradual decrease in the evaporation rate of the soil with an increase in fiber and PAM content.This improvement also hinders the development of surface cracks in the soil.The strong water absorption capability of PAM contributes to reducing the soil's evaporation rate,while the bridging effect of fiber inhibits the expansion of cracks,enhancing the overall integrity of the soil.关键词
黏土/剑麻纤维/聚丙烯酰胺/干缩开裂/微观机理Key words
Clay/Sisal fiber/Polyacrylamide/Shrinkage crack/Micro mechanism分类
建筑与水利引用本文复制引用
宋泽卓,刘瑾,王梓,卜凡,何承宗..剑麻纤维-聚丙烯酰胺改良客土干缩开裂试验研究[J].工程地质学报,2024,32(1):28-38,11.基金项目
国家自然科学基金项目(资助号:41877212),中央高校基本科研业务费(资助号:B210203037).This research is supported by the National Natural Science Foundation of China(Grant No.41877212)and Fundamental Research Funds for the Central Universities(Grant No.B210203037). （资助号:41877212）
