非饱和人工制备遗址土渗水系数预测  

Prediction of Permeability Coefficient of Unsaturated Artificially Prepared Heritage Site Soil

作　　者：焦韩伟 雷天奇 陈振鹏 Jiao Hanwei;Lei Tianqi;Chen Zhenpeng(Shaanxi Railway Institute;Ansteel Mining Engineering Coporation)

机构地区：[1]陕西铁路工程职业技术学院,陕西渭南71400 [2]鞍钢集团矿业设计研究院有限公司,辽宁鞍山114004

出　　处：《勘察科学技术》2024年第6期5-9,共5页Site Investigation Science and Technology

基　　金：陕西铁路工程职业技术学院科研基金项目(KY2022-46)。

摘　　要：针对西北地区大部分古遗址皆处于非饱和状态,而非饱和人工制备遗址土的渗透性关乎遗址土的长期完整性和稳定性。该文利用非饱和土固结仪测得人工制备遗址土的土水特征曲线,并利用V-G模型对所测数据进行拟合,同时采用变水头法量测得到人工制备遗址土的饱和渗水系数,并基于所测得的土水特征曲线,利用Childs&Collis-George模型预测非饱和人工制备遗址土的渗水系数,得到非饱和人工制备遗址土的体积含水率及基质吸力和渗水系数之间的关系曲线。研究结果表明:糯米浆掺入量对人工制备遗址土的土水特征曲线有着一定的影响,糯米浆掺入量越大,进气值越大;人工制备遗址土的饱和渗水系数随着糯米浆掺入量的增大而逐渐减小;在同一土与糯米浆质量比下,人工制备遗址土的非饱和渗水系数随着体积含水率的增大而增大,随着基质吸力的增大呈现出先迅速减小后趋于平缓的趋势,基质吸力一定时,非饱和渗水系数随着糯米浆掺入量的增加而减小。Most of the ancient sites in Northwest China are in an unsaturated state,and the permeability of unsaturated artificially prepared heritage site soil is crucial for the long-term integrity and stability of these sites.The soil-water characteristic curve(SWCC)of artificially prepared heritage site soil is measured by the unsaturated soil consolidometer,and the measured data are fitted using the V-G model.At the same time,the saturated permeability coefficient of the artificially prepared heritage site soil is measured by the falling head permeabiling method.Based on the measured SWCC,the Childs&Collis George model is employed to predict the permeability coefficient of the unsaturated artificially prepared heritage site soil.The relationship curves between volumetric water content,matric suction,and the permeability coefficient is established.The research results show that the mixing amount of glutinous rice slurry has a certain influence on the SWCC of artificially prepared heritage site soil.As the mixing amount of glutinous rice slurry increases,the air entry value increases while the saturated water permeability coefficient of artificially prepared heritage site soil decreases with the increasing glutinous rice slurry content.For a same quality ratio of the soil and glutionous rice slurry,the unsaturated permeability coefficient of the artificially prepared heritage site soil increases with increasing volumetric water content and initially decreases rapidly with increasing matric suction before leveling off.At a constant matric suction,the unsaturated permeability coefficient decreases with increasing glutionous rice slurry content.

关 键 词：人工制备遗址土 土水特征曲线 渗水系数 基质吸力 

分 类 号：K87[历史地理—考古学及博物馆学]