摘要
土的强度是岩土工程研究最关心的重要性质之一。以青海湖典型粉土地基的加固为研究对象,通过无侧限抗压强度试验和直剪试验,分析黄原胶对青海湖粉土强度特性的影响。结果表明,添加黄原胶后的加固粉土试样的无侧限抗压强度、抗剪强度及抗剪强度指标均随着黄原胶掺量的增加呈现先增大后减小的趋势;黄原胶掺量1%为试样各强度指标的最优配比,此时土体的抗压强度及抗剪强度可以得到最好的增强效果;当黄原胶掺量超过某值后,会出现强度降低的现象,甚至低于未掺入黄原胶时的强度。因此建议采用黄原胶加固青海湖粉土时,必须严格控制黄原胶的配比,避免出现强度不升反降的情况。
Soil strength is one of the most critical properties in geotechnical engineering research.This study focuses on the reinforcement of typical silt foundations in Qinghai Lake,analyzing the influence of xanthan gum on the strength characteristics of Qinghai Lake silt through unconfined compressive strength tests and direct shear tests.The experimental results indicate that the unconfined compressive strength,shear strength,and shear strength parameters of the reinforced silt samples initially increase and then decrease with the increasing xanthan gum content.The optimal xanthan gum content is found to be 1%,at which the soil exhibits the highest compressive and shear strength.However,when the xanthan gum content exceeds a certain threshold,the strength begins to decline,even falling below that of untreated silt.Therefore,it is recommended to strictly control the xanthan gum mixing ratio when reinforcing Qinghai Lake silt to avoid a reduction in strength rather than improvement.
作者
金一笑
张蕾
王东
耿永红
JIN Yixiao;ZHANG Lei;WANG Dong;GENG Yonghong(Department of Civil Engineering,Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China;College of Urban Construction,Yunnan Open University,Kunming 650000,China)
出处
《材料导报》
北大核心
2025年第S2期393-397,共5页
Materials Reports
关键词
黄原胶
青海湖粉土
无侧限抗压强度
抗剪强度
地基加固
xanthan gum
Qinghai Lake silt
unconfined compressive strength
shear strength
ground improvement
