黄土古土壤互层下黄土剖面含水率分布修正模型研究

贺海超; 南亚林; 姚淼; 薛君豪; 王仲毅; 郭鉴辉; 李静; 郭东欣; 罗冬

doi:10.20265/j.cnki.issn.1007-2993.2024-0575

黄土古土壤互层下黄土剖面含水率分布修正模型研究

doi: 10.20265/j.cnki.issn.1007-2993.2024-0575

贺海超^{1, 2,},
南亚林^{1, 2},
姚淼^{1, 2},
薛君豪^3,,
王仲毅³,
郭鉴辉³,
李静^{3, 4},
郭东欣^{1, 2},
罗冬^3, ,

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

基金项目: 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）

详细信息

作者简介:
贺海超，男，1982年生，工程硕士，高级工程师，主要从事岩土工程勘察和测试等科研与生产工作。E-mail：104865381@qq.com

通讯作者:
罗　冬，女，1983年生，副教授，硕士生导师，主要从事基础设施建设结构健康监测。E-mail：luodong@xjtu.edu.cn

中图分类号: P642
计量
- 文章访问数: 51
- HTML全文浏览量: 10
- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2024-12-07
- 修回日期: 2025-01-12
- 录用日期: 2025-02-14
- 网络出版日期: 2025-04-07
- 刊出日期: 2025-04-08

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

He Haichao^{1, 2
,},
Nan Yalin^{1, 2},
Yao Miao^{1, 2},
Xue Junhao^3
,,
Wang Zhongyi³,
Guo Jianhui³,
Li Jing^{3, 4},
Guo Dongxin^{1, 2},
Luo Dong^{3
, ,}

1.
Telecom Comprehensive Survey and Design Institute Co., Ltd., Xi’an, 710054, Shaanxi, China
2.
Shaanxi Engineering Research Center of Soil Body, Xi’an, 710049, Shaanxi, China
3.
School of Habitat Environment and Architectural Engineering, Xi’an Jiaotong University, Shaanxi Xi’an, 710049
4.
Shaanxi Building Science Research Institute Co., Ltd, Xi’an, 710003, Shaanxi, China

摘要

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。
- 古土壤 /
- 土壤水分特征曲线 /
- 剖面含水率
Abstract: 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 software. Based on simulation data, a moisture content correction model was established and validated against field immersion test measurements. 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.
- ancient soil /
- soil moisture characteristic curve /
- section moisture content

HTML全文

图 1 SWC-150型土水特征曲线压力仪

下载: 全尺寸图片幻灯片

图 2 土水特征曲线数据点线图

下载: 全尺寸图片幻灯片

图 3 各土样土水特征曲线拟合曲线

下载: 全尺寸图片幻灯片

图 4 各模型模拟体积含水率等值线

下载: 全尺寸图片幻灯片

图 5 各古土壤在不同黄土中的含水率模拟结果

下载: 全尺寸图片幻灯片

图 6 各古土壤在不同黄土中的灵敏系数模拟结果

下载: 全尺寸图片幻灯片

图 7 简化模型示意图

下载: 全尺寸图片幻灯片

图 8 L₃段线的线性拟

下载: 全尺寸图片幻灯片

图 9 部分参数拟合曲线

下载: 全尺寸图片幻灯片

图 10 L₂段线的线性拟合

下载: 全尺寸图片幻灯片

图 11 试验场地位置示意图

下载: 全尺寸图片幻灯片

图 12 华原村试坑鸟瞰图

下载: 全尺寸图片幻灯片

图 13 修正含水率与实测含水率对比图

下载: 全尺寸图片幻灯片

表 1 不同取土场地黄土古土壤的基本物性指标

土样名称	取土深度/m	初始含水率w₀/ %	土粒比重G_s	干密度ρ_d/(g·cm⁻³)	初始孔隙比e₀	液限w_L/ %	塑限 w_p/ %	塑性指数 I_p
Q2-1	11	18.9	2.71	1.37	0.95	28.8	19.2	9.6
Q3-1	5	17.2	2.71	1.28	1.133	28.4	19.4	9
古土壤1	8	18.5	2.71	1.43	0.788	27.6	17.2	10.4
古土壤2	11	10	2.7	1.56	0.734	27	19	8

下载: 导出CSV

表 2 VG模型中各参数拟合结果

土样	a	n	m	R²
古土壤1	0.012	1.084	0.774	0.99
古土壤2	0.012	0.992	1.093	0.99
Q2-1	0.025	0.935	0.920	0.99
Q3-1	0.037	1.173	0.452	0.99

下载: 导出CSV

表 3 L₃线性拟合k₃值

古土壤厚度/m	下伏Q₃黄土时k₃	下伏Q₂黄土时k₃
0.5	0.0123	0.008
1	0.0290	0.017
2	0.0375	0.024
3	0.0427	0.029

下载: 导出CSV

表 4 多层古土壤剖面含水率修正模型

深度/m	土层类型	基础含水率/％	含水率修正
深度/m	土层类型	基础含水率/％	古1层	古2层	古3层	…
1	Q₃黄土	w_s
2		w_s
3		w_s	S_t(1, −1)
4	古土壤	w_s	S_t(2, 0)
5	Q₃黄土	w_s	S_t(3, 1)
6		w_s	S_t(3, 2)
7		w_s S_t(3, 2)		S_t(1, −1)
8	古土壤	w_s S_t(3, 2)		S_t(2, 0)
9	Q₃黄土	w_s S_t(3, 2)		S_t(3, 1)
10		w_s S_t(3, 2)		S_t(3, 2)
11		w_s S_t(3, 2) S_t(3, 2)			S_t(1, −2)
12		w_s S_t(3, 2) S_t(3, 2)			S_t(1, −1)
13	古土壤	w_s S_t(3, 2) S_t(3, 2)			S_t(2, 0)
14	Q₂黄土	w_s S_t(3, 2) S_t(3, 2)			S_t(3, 1)
15	Q₂黄土	w_s S_t(3, 2) S_t(3, 2)			S_t(3, 2)
…
注：将每行各数相乘得到每米深度内的修正含水率。w_s为饱和含水率，表达式为e₀/（1+e₀ ）；S_t（i，j）为该层土的灵敏系数；i为使用单层古土壤修正模型中的第i段表达式；j为古土壤上表面相对深度， m。

下载: 导出CSV

表 5 铜川某园区地层含水率修正结果

土壤类型	代表深度/m	饱和含水率	第1层古土壤修正	第2层古土壤修正	第3层古土壤修正	第4层古土壤修正	计算修正含水率
Q₃黄土L₁	0~1.0	0.40	1.00	1.00	1.00	1.00	0.40
	1.0~2.0	0.40	1.00	1.00	1.00	1.00	0.40
	2.0~3.0	0.42	1.00	1.00	1.00	1.00	0.42
	3.0~4.0	0.43	1.00	1.00	1.00	1.00	0.43
	4.0~5.0	0.45	1.16	1.00	1.00	1.00	0.45
	5.0~6.0	0.46	1.32	1.00	1.00	1.00	0.46
古土壤P₁	6.0~7.0	0.46	1.25	1.00	1.00	1.00	0.46
Q₂黄土L₂	7.0~8.0	0.41	1.18	1.00	1.00	1.00	0.41
	7.9～9.0	0.38	0.83	1.00	1.00	1.00	0.32
	9.0～10.0	0.40	0.89	1.00	1.00	1.00	0.36
	10.0～11.0	0.42	0.91	1.19	1.00	1.00	0.42
	11.0～12.7	0.38	0.91	1.37	1.00	1.00	0.38
古土壤P₂	12.7～14.0	0.35	0.91	1.51	1.00	1.00	0.35
古土壤P₂	14.0～15.1	0.40	0.91	1.20	1.00	1.00	0.40
Q₂黄土L₃	15.1～16.0	0.38	0.91	0.81	1.00	1.00	0.28
	16.0～17.0	0.37	0.91	0.85	1.15	1.00	0.33
	17.0～18.0	0.38	0.91	0.85	1.31	1.00	0.38
古土壤P₃	18.0～19.0	0.38	0.91	0.85	1.45	1.00	0.38
	19.0～20.0	0.38	0.91	0.85	1.14	1.00	0.33
	20.0～21.2	0.38	0.91	0.85	0.85	1.19	0.30
Q₂黄土L₄	21.2～22.5	0.39	0.91	0.85	0.88	1.37	0.36
古土壤P₄	22.5～24.0	0.38	0.91	0.85	0.88	1.51	0.38
古土壤P₄	24.0～24.8	0.36	0.91	0.85	0.88	1.20	0.29
Q₂黄土L₅	24.8～26.0	0.37	0.91	0.85	0.88	0.81	0.20
	26.0～27.0	0.36	0.91	0.85	0.88	0.83	0.21
	27.0～28.0	0.37	0.91	0.85	0.88	0.85	0.21
	28.0～29.0	0.39	0.91	0.85	0.88	0.89	0.24
	29.0～30.0	0.38	0.91	0.85	0.88	0.93	0.24

下载: 导出CSV

参考文献(12)

[1]	HOU K, QIAN H, ZHANG Y T, et al. Seepage mechanisms and permeability differences between loess and paleosols in the critical zone of the Loess Plateau[J]. Earth Surface Processes and Landforms,2021,46(10):2044-2059. doi: 10.1002/esp.5143
[2]	李琳, 王家鼎, 谷琪, 等. 古土壤层间富水对黄土场地湿陷性的影响[J]. 西北大学学报(自然科学版),2024,54(1):72-83. (LI L, WANG J D, GU Q, et al. The influence of moisture-rich interlayers in palesol strata on the collapsibility of loess terrain[J]. Journal of Northwest University (Natural Science Edition),2024,54(1):72-83. (in Chinese) LI L, WANG J D, GU Q, et al. The influence of moisture-rich interlayers in palesol strata on the collapsibility of loess terrain[J]. Journal of Northwest University (Natural Science Edition), 2024, 54（1）: 72-83. (in Chinese)
[3]	赵金刚, 吕远强, 晁军, 等. 典型黄土–古土壤系列浸水渗透及湿陷变形规律[J]. 煤田地质与勘探,2020,48(3):152-159,168. (ZHAO J G, LYU Y Q, CHAO J, et al. The law of soaking infiltration and collapse deformation in typical loess-paleosol series[J]. Coal Geology & Exploration,2020,48(3):152-159,168. (in Chinese) ZHAO J G, LYU Y Q, CHAO J, et al. The law of soaking infiltration and collapse deformation in typical loess-paleosol series[J]. Coal Geology & Exploration, 2020, 48（3）: 152-159,168. (in Chinese)
[4]	SHAO T J, WANG R J, XU Z P, et al. Permeability and groundwater enrichment characteristics of the loess-paleosol sequence in the southern Chinese Loess Plateau[J]. Water,2020,12(3):870. doi: 10.3390/w12030870
[5]	CHEN Y, QIAN H, HOU K, et al. Permeability and paleoenvironmental implications of loess-paleosol sequence from Jingyang Loess Plateau[J]. Environmental Earth Sciences,2021,80(1):18. doi: 10.1007/s12665-020-09282-y
[6]	赵景波, 王长燕, 刘护军, 等. 陕西洛川黄土剖面上部土层水分入渗规律与含水条件研究[J]. 水文地质工程地质,2010,37(1):124-129,134. (ZHAO J B, WANG C Y, LIU H J, et al. A study of water infiltration and water-bearing condition of the L₁–S₄ layers in Luochuan, Shaanxi[J]. Hydrogeology & Engineering Geology,2010,37(1):124-129,134. (in Chinese) doi: 10.3969/j.issn.1000-3665.2010.01.025 ZHAO J B, WANG C Y, LIU H J, et al. A study of water infiltration and water-bearing condition of the L₁–S₄ layers in Luochuan, Shaanxi[J]. Hydrogeology & Engineering Geology, 2010, 37（1）: 124-129,134. (in Chinese) doi: 10.3969/j.issn.1000-3665.2010.01.025
[7]	郁耀闯, 杨树瑶, 王长燕, 等. 宝鸡地区L₁–S₅黄土和古土壤水分入渗及影响因素[J]. 水土保持研究,2023,30(6):78-85. (YU Y C, YANG S Y, WANG C Y, et al. Water infiltration and influencing factors of L₁–S₅ loess-paleosol in Baoji region[J]. Research of Soil and Water Conservation,2023,30(6):78-85. (in Chinese) YU Y C, YANG S Y, WANG C Y, et al. Water infiltration and influencing factors of L₁–S₅ loess-paleosol in Baoji region[J]. Research of Soil and Water Conservation, 2023, 30（6）: 78-85. (in Chinese)
[8]	李培月, 李佳慧, 吴健华, 等. 黄土–古土壤互层对土壤水分运移及土体微结构的影响[J]. 水文地质工程地质,2024,51(3):1-11. (LI P Y, LI J H, WU J H, et al. Effects of loess-paleosol interbedding on soil moisture transport and soil microstructure[J]. Hydrogeology & Engineering Geology,2024,51(3):1-11. (in Chinese) LI P Y, LI J H, WU J H, et al. Effects of loess-paleosol interbedding on soil moisture transport and soil microstructure[J]. Hydrogeology & Engineering Geology, 2024, 51（3）: 1-11. (in Chinese)
[9]	赵志强, 戴福初, 闵弘, 等. 原状黄土–古土壤中水分入渗过程研究[J]. 岩土力学,2021,42(9):2611-2621. (ZHAO Z Q, DAI F C, MIN H, et al. Research on infiltration process in undisturbed loess-paleosol sequence[J]. Rock and Soil Mechanics,2021,42(9):2611-2621. (in Chinese) ZHAO Z Q, DAI F C, MIN H, et al. Research on infiltration process in undisturbed loess-paleosol sequence[J]. Rock and Soil Mechanics, 2021, 42（9）: 2611-2621. (in Chinese)
[10]	刘建磊, 卫童瑶, 惠寒斌, 等. 大厚度非连续湿陷性黄土浸水变形特征分析[J]. 地质力学学报,2024,30(6):921-932. (LIU J L, WEI T Y, HUI H B, et al. Analysis of soaking deformation characteristics of large-thickness discontinuous collapsible loess[J]. Journal of Geomechanics,2024,30(6):921-932. (in Chinese) doi: 10.12090/j.issn.1006-6616.2023174 LIU J L, WEI T Y, HUI H B, et al. Analysis of soaking deformation characteristics of large-thickness discontinuous collapsible loess[J]. Journal of Geomechanics, 2024, 30（6）: 921-932. (in Chinese) doi: 10.12090/j.issn.1006-6616.2023174
[11]	黄晓波, 高冰可. 土壤水分特征曲线研究综述[J]. 农技服务, 2016, 33(4): 22-23, 27. (HUANG X B, GAO B K. A review of soil moisture characteristic curves[J]. Agricultural Technology Service, 2016, 33(4): 22-23, 27. (in Chinese) HUANG X B, GAO B K. A review of soil moisture characteristic curves[J]. Agricultural Technology Service, 2016, 33(4): 22-23, 27. (in Chinese)
[12]	王俊, 黄岁樑. 土壤水分特征曲线模型对数值模拟非饱和渗流的影响[J]. 水动力学研究与进展,2010,25(1):16-22. (WANG J, HUANG S L. Effect of soil water characteristic models on numerical modeling of unsaturated flow[J]. Chinese Journal of Hydrodynamics,2010,25(1):16-22. (in Chinese) WANG J, HUANG S L. Effect of soil water characteristic models on numerical modeling of unsaturated flow[J]. Chinese Journal of Hydrodynamics, 2010, 25（1）: 16-22. (in Chinese)