理论与试验研究

自重湿陷性黄土场地冬季现场浸水试验研究

  • 曲晨飞 ,
  • 纪成亮 ,
  • 李仁杰 ,
  • 张继超 ,
  • 卢向星
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  • 1.山东电力工程咨询院有限公司勘测事业部,济南 250013;
    2.空军工程大学 航空工程学院,西安 710038
曲晨飞(1990—),男,山东聊城人,高级工程师,主要从事工程地质灾害机理分析与防控。E-mail:liugang_iggcas@163.com
张继超(1997—),男,山东潍坊人,博士生,主要从事机场规划设计及特殊土地基处理研究工作。 E-mail :zhangjichao930@163.com

收稿日期: 2025-05-18

  网络出版日期: 2026-03-03

基金资助

国家自然科学基金(11972374);陕西省重点研发计划(2023-ZDLNY-68)

Field Immersion Test on a Self-WeightCollapsible Loess Site in Winter

  • Qu Chenfei ,
  • Ji Chengliang ,
  • Li Renjie ,
  • Zhang Jichao ,
  • Lu Xiangxing
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  • 1. Survey Division, Shandong Electric Power Engineering Consulting Institute Co., Ltd., Jinan 250013, P.R. China;
    2. Aviation Engineering School, Air Force Engineering University, Xi'an 710038, P.R. China

Received date: 2025-05-18

  Online published: 2026-03-03

摘要

大型浸水试验是黄土场地湿陷性评价的重要手段,以往均在自然适温环境下开展,鲜有在冬季寒冷环境下进行的先例。以某特高压直流输电工程为依托,在典型的大厚度自重湿陷性黄土场地开展现场大型浸水试验,论证冬季开展此类试验的适宜性,探讨浸水过程中的水分扩散规律、湿陷变形特征,实现冬季现场浸水试验的黄土场地自重湿陷性变形的科学评价。结果表明:通过搭设大型保温棚并锅炉加热措施,提升棚内浸水试坑的大气温度,有效解决了冬季试坑浸水试验的水面冰冻难题;打设注水孔,明显地改变了试坑中的水分扩散路径,以注水孔的径向渗流和富水向上迁移的扩散路径为主;浅表沉降、深层沉降及水平位移呈现出先缓变再陡变后趋于稳定趋势,地表沉降达188.47 mm,自重湿陷下限深度达16.50 m;发现了场地自重湿陷量实测值与其计算值差异的根本在于古土壤层的拱效应。研究成果可为某特高压直流输电工程地基处理、桩基础等提供重要技术依据,也为该地区其他工程建设提供有益参考。

本文引用格式

曲晨飞 , 纪成亮 , 李仁杰 , 张继超 , 卢向星 . 自重湿陷性黄土场地冬季现场浸水试验研究[J]. 地下空间与工程学报, 2026 , 22(1) : 190 -200 . DOI: 10.20174/j.JUSE.2026.01.20

Abstract

Large-scale field immersion test is an important means to evaluate the collapsibility of loess sites, which has been carried out in the natural temperature environment in the past. However, there are few precedents for conducting such tests in the cold environment in winter. Based on an ultra-high-voltage direct current transmission project, a large-scale on-site immersion test was carried out in a typical large-thickness self-weighted collapsible loess site, to demonstrate the feasibility of conducting such tests in winter, to explore the water diffusion law and collapsible characteristics during the immersion process, and thus to realize the scientific evaluation of the self-weighted collapsible deformation of loess sites in winter on-site immersion test. The results show that: The atmospheric temperature of the immersion test pit in the shed is raised by setting up a large heat preservation shed and boiler heating measures, which effectively solves the water surface freezing of the test pit immersion test in winter. The installation of water injection holes significantly altered the water diffusion paths in the pit, and the radial seepage from the injection holes and the enrichment of water near paleosoil stratigraphy, thereby resulting in a predominantly upward migration of water. The shallow surface settlement, deep settlement and horizontal displacement showed a trend of slow change, then steep change and then stabilization, with the surface settlement reaching 188.47 mm and the lower limit of self-weight wet subsidence reaching 16.50 m. It was also found that the difference between the measured and calculated values of the self-weight collapsible deformation was due to the arch effect of the paleosol layer. The research results can provide important technical basis for foundation treatment and pile foundation of UHV DC engineering, and also provide useful reference for other engineering construction in this area.

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