黄土古土壤互层下黄土剖面含水率分布修正模型研究  

Modified model of moisture content distribution of loess profile for loess paleosoil interlayer

作　　者：贺海超 南亚林 姚淼 薛君豪 王仲毅 郭鉴辉 李静 郭东欣 罗冬 He Haichao;Nan Yalin;Yao Miao;Xue Junhao;Wang Zhongyi;Guo Jianhui;Li Jing;Guo Dongxin;Luo Dong(Telecom Comprehensive Survey and Design Institute Co.,Ltd.,Xi’an,710054,Shaanxi,China;Shaanxi Engineering Research Center of Soil Body,Xi’an,710049,Shaanxi,China;School of Habitat Environment and Architectural Engineering,Xi’an Jiaotong University,Shaanxi Xi’an,710049;Shaanxi Building Science Research Institute Co.,Ltd,Xi’an,710003,Shaanxi,China)

机构地区：[1]信电综合勘察设计研究院有限公司,陕西西安710054 [2]陕西省“四主体一联合”土体工程技术研究中心,陕西西安710049 [3]西安交通大学人居环境与建筑工程学院,陕西西安710049 [4]陕西省建筑科学研究院有限公司,陕西西安710003

出　　处：《岩土工程技术》2025年第2期167-176,共10页Geotechnical Engineering Technique

基　　金：陕西省四主体一联合土体中心(2022ZY2-CXJD-09,2023-YBNY-234);国家自然科学基金(52078418);陕西省重点研发计划(2024SF-YBXM-537);未来城市建设与管理创新联合研究中心(20211177-ZKT14);西安交通大学基本科研业务费(xzd012022071);榆林市科技计划项目(CityCXY-2020-046)。

摘　　要：为准确测量黄土古土壤互层下各土层的饱和程度,对黄土古土壤互层下黄土剖面含水率分布修正,用压力板法测得铜川地区黄土和古土壤的土壤水分特征曲线,进而用midas GTS NX软件进行非饱和渗流数值模拟,根据模拟数据建立含水率修正模型,并与现场浸水试验实测数据进行对比。研究表明:相同地质年代,不同古土壤受水分下渗的影响相对一致,但是不同地质时期,受影响的差异性变得明显;构建的含水率修正模型的计算值和实测值在黄土古土壤交接处等关键节点处的上下趋势基本一致,可以证明多层古土壤含水率模型计算的准确性和科学性。研究成果可为具有古土壤层的黄土地区含水率修正,进而提高黄土–古土壤互层地区湿陷性评价的精度提供参考。To accurately measure the saturation levels of individual soil layers in loess-paleosol interbedded strata and revise the moisture content distribution in loess profiles,the pressure plate method were employed to obtain soil-water characteristic curves for both loess and paleosol in Tongchuan area.Unsaturated seepage numerical simulations were conducted using Midas GTS NX soft-ware.Based on simulation data,a moisture content correction model was established and validated against field immersion test meas-urements.The results of this model were then compared with the measurements from the in-situ immersion test.The study shows that in the same geological age,the influence of different ancient soil on water infiltration is relatively consistent,but in different geological periods,the difference of this influence becomes obvious.The calculated value and measured value of the constructed moisture content correction model are basically consistent with the upward and downward trend in the key nodes such as the junction of loess ancient soil,which can prove the accuracy and scientificity of the moisture content model calculation of multi-layer ancient soil.This study provides a reference for the moisture content correction in the loess areas with the ancient soil layer,which can improve the accuracy of the collapsibility evaluation in the loess-ancient soil reciprocal layer.

关 键 词：古土壤 土壤水分特征曲线 剖面含水率 

分 类 号：P642[天文地球—工程地质学]