Evaluation of frost heave and moisture/chemical migration mechanisms in highway subsoil using a laboratory simulation method

被引:37
|
作者
Sarsembayeva, Assel [1 ]
Collins, Philip E. F. [1 ]
机构
[1] Brunel Univ London, Div Civil Engn, Kingston Lane, Uxbridge UB8 3PH, Middx, England
关键词
Freeze-thaw; Highway subsoil; De-icing chemicals; Laboratory test; Sandy clay; SALT REDISTRIBUTION; TEMPERATURE; SOILS; GRADIENTS; SYSTEM; WATER; SILT; CLAY;
D O I
10.1016/j.coldregions.2016.10.003
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Seasonal processes in cold countries significantly affect the engineering characteristics of highway subsoil over time. Cyclical freeze-thaw leads to changes in thermal and moisture conditions. As a result, road bearing capacity can progressively change from the initial design. In this work, a modified laboratory method was developed, with cyclical freeze-thaw of soil samples and simultaneous supply of deionised water and a de-icing agent ( sodium chloride) to the base. The benefits of the test procedure included slow freezing, simulating the conditions that can be experienced by highway soils in cold environments, extended soil column heights and a larger number of identical soil samples, which allowed experimental variability to be assessed. The method included the monitoring of moisture and chemical mass transfer in the soils. Samples supplied with deionised water experienced ice segregation in their upper parts, and significant heave. While soils supplied with NaCl solution behaved in a similar fashion during their first freeze-thaw cycle, the second cycle saw a reduction in the rate of migration of the freezing front within the soils and also less ice segregation and less heave due to increased salinity. Salt was preferentially transferred upwards in the soil columns as a result of the thermal gradient, including negative pressure associated with cryosuction, and osmotic pressure. The new method provides a more realistic laboratory approach to assessing potential freeze-thaw impacts, and the effects of de-icing agents on soils beneath roads, and in different settings. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:26 / 35
页数:10
相关论文
共 5 条
  • [1] Numerical Simulation of Soil Heat and Moisture Migration Containing Different Stones Using Lattice Boltzmann Method
    Hu, Shengkang
    Han, Yuge
    Lin, Qunqing
    Ren, Dengfeng
    JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS, 2023, 15 (07)
  • [2] Numerical Simulation Study on Frost Heave during the Freezing Phase of Shallow-Buried and Undercut Tunnel Using the Freeze-Sealing Pipe Roof Method
    Duan, Yin
    Rong, Chuanxin
    Long, Wei
    APPLIED SCIENCES-BASEL, 2023, 13 (18):
  • [3] Evaluation of the alternatives for gold ore grinding circuits by using of laboratory studies results and simulation method; case study: Iranian Gold Co
    Gharehgheshlagh, Hojjat Hosseinzadeh
    Cebeci, Ayse Tugba
    Ergun, Sevket Levent
    BULLETIN OF THE MINERAL RESEARCH AND EXPLORATION, 2019, 159 : 219 - 233
  • [4] Evaluation of Cavitation Occurrence Based on Reliability in Chute Spillways by Using First Order Reliable Method and Monte Carlo Simulation Method from 18 Spillways Laboratory Models, Iran
    Mehdi Azhdary Moghaddam
    Amin Hasanalipour Shahrabadi
    KSCE Journal of Civil Engineering, 2020, 24 : 1169 - 1182
  • [5] Evaluation of Cavitation Occurrence Based on Reliability in Chute Spillways by Using First Order Reliable Method and Monte Carlo Simulation Method from 18 Spillways Laboratory Models, Iran
    Moghaddam, Mehdi Azhdary
    Shahrabadi, Amin Hasanalipour
    KSCE JOURNAL OF CIVIL ENGINEERING, 2020, 24 (04) : 1169 - 1182