岩土力学 ›› 2025, Vol. 46 ›› Issue (12): 3998-4008.doi: 10.16285/j.rsm.2024.1611CSTR: 32223.14.j.rsm.2024.1611

• 岩土工程研究 • 上一篇    下一篇

植绿土质覆盖层渗流的温度效应研究

王浩1, 2，郭帆1, 2，陈锐1, 2，刘垒雷1, 3，罗之源1, 2   

  1. 1. 哈尔滨工业大学（深圳） 智能学部智能土木与海洋工程学院，广东 深圳 518055； 2. 哈尔滨工业大学（深圳） 广东省土木工程智能韧性结构重点实验室，广东 深圳 518055； 3. 江苏工程职业技术学院 建筑工程学院，江苏 南通 226007
  • 收稿日期:2024-12-30 接受日期:2025-04-17 出版日期:2025-12-11 发布日期:2025-12-20
  • 通讯作者: 陈锐，男，1978年生，博士，教授，博士生导师，主要从事非饱和土方面的研究。E-mail: cechenrui@hit.edu.cn
  • 作者简介:王浩，男，1995年生，博士研究生，主要从事非饱和植根土方面的研究。E-mail: wanghao20182021@163.com
  • 基金资助:
    国家自然科学基金（No.52261160382）；广东省土木工程智能韧性结构重点实验室（No.2023B1212010004）；深圳市科技计划项目（No.KQTD20210811090112003，No.GXWD20231129150330001）。

Temperature effects on seepage in vegetated soil cover

WANG Hao1, 2, GUO Fan1, 2, CHEN Rui1, 2, LIU Lei-lei1, 3, LUO Zhi-yuan1, 2   

  1. 1. School of Intelligent Civil and Ocean Engineering, Harbin Institute of Technology, Shenzhen, Guangdong 518055, China; 2. Guangdong Provincial Key Laboratory of Intelligent and Resilient Structures for Civil Engineering, Harbin Institute of Technology, Shenzhen, Guangdong 518055, China; 3. School of Civil Engineering, Jiangsu College of Engineering and Technology, Nantong, Jiangsu 226007, China
  • Received:2024-12-30 Accepted:2025-04-17 Online:2025-12-11 Published:2025-12-20
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (52261160382), the Guangdong Key Laboratory of Intelligent Resilient Structures in Civil Engineering (2023B1212010004) and the Shenzhen Science and Technology Program (KQTD20210811090112003, GXWD20231129150330001).

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摘要： 城市固废垃圾分解释放热量导致植绿土质覆盖层温度升高，改变甚至劣化覆盖层雨水入渗调节功能。为研究温度效应作用下植绿土质覆盖层的降雨入渗特性，研制基于多点温度控制的全自动土柱温控系统，开展温控土柱模型降雨入渗试验。把非等温植根土持水曲线本构模型导入COMSOL进行二次开发，实现植绿土质覆盖层非等温渗流的有限元模拟。试验与模拟结果相一致，共同表明：温度显著影响含水率的时空分布，升温导致湿润锋下移、浅层含水率降低和峰值含水率位置下移。基于非等温植根土持水曲线本构的数值模型具备良好的可用性与预测效果，忽视温度效应可能错估填埋场渗沥污染、填埋体失稳风险。该研究成果可为固废填埋场水−热耦合分析、覆盖层设计提供借鉴。

关键词: 持水曲线模型, COMSOL, 植根土, 非等温土, 土柱试验

Abstract: The decomposition of municipal solid waste released heat energy, leading to temperature increase in vegetated soil covers and thus changed and even deteriorated the function of rainwater regulation of landfill soil covers at municipal solid waste landfills. To investigate rainfall infiltration in vegetated soil covers under temperature effects, we developed an automatic, multi-point temperature-control system for soil-column tests. Temperature-controlled soil-column model tests were then conducted under rainfall conditions. Using the nonisothermal soil–water retention curve model for rooted soils, we conducted finite-element simulations of nonisothermal seepage in vegetated soil covers through secondary development of COMSOL. Test results and numerical simulations are well consistent and show that temperature significantly affects the spatiotemporal distribution of soil water content. Higher temperature caused deeper positions of wetting front and peak water content as well as reduction in water content of surface layer in vegetated soil covers of municipal solid waste landfills. Derived from the nonisothermal soil water retention curve model of rooted soils, the numerical model of vegetated soil covers shows satisfactory usability and predictability. Ignoring the temperature effect likely induces misleading prediction of leachate pollution and landfill stability in municipal solid waste landfills. This study provides references for the hydraulic-thermal coupling analysis and design of vegetated soil covers for municipal solid waste landfills.

Key words: soil water retention curve model, COMSOL, rooted soils, nonisothermal soils, soil column test

中图分类号: TU411.4
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