粘粒含量和孔隙比对微生物固化粉土效果影响研究  

Study on the Effect of Clay Content and Pore Ratio on Microbial Solidification of Silt

作　　者：朱锐萌 程留全 赵帅 ZHU Ruimeng;CHENG Liuquan;ZHAO Shuai(College of Earth Science and Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450000,China)

机构地区：[1]华北水利水电大学地球科学与工程学院,河南郑州450000

出　　处：《云南水力发电》2024年第2期76-79,共4页Yunnan Water Power

基　　金：河南省自然科学基金项目(232300421208)。

摘　　要：为研究粘粒含量和孔隙比对微生物固化粉土的影响效果,以黄河中下游典型粉土为研究对象,通过人工制作不同粘粒含量和孔隙比的粉土,采用蠕动泵将微生物菌液和营养盐对粉土进行低压注浆。分析了不同粘粒含量和孔隙比与碳酸钙生成量、单抽抗压强度和波速之间的变化规律。试验结果表明,当孔隙比为0.8且小于0.075 mm的粘粒含量为75%时,微生物加固粉土效果达到最优,继续增大孔隙比与粘粒含量,各项指标均呈现下降趋势。To study the effect of clay content and pore ratio on microbial solidified silt,this paper takes typical silt in the middle and lower reaches of the Yellow River as the research object.By artificially producing silt with different clay content and porosity ratios,a peristaltic pump is used to inject microbial liquid and nutrients into the silt under low pressure.This article analyzes the changes in the relationship between different clay content and porosity,calcium carbonate production,single extraction compressive strength,and wave velocity.The experimental results show that when the porosity ratio is 0.8 and the clay content is less than 0.075 mm is 75%,the microbial reinforcement effect of silt reaches the optimal level.As the porosity and clay content continue to increase,all indicators show a downward trend.

关 键 词：粘粒含量 孔隙比 微生物注浆 

分 类 号：S152.5[农业科学—土壤学] S154.34[农业科学—农业基础科学]