文献类型：期刊文献

英文题名：Experimental Study of the Anisotropic Frost Heave Characteristics of Rock Surrounding Tunnels in Cold Regions

作者：Feng, Qiang Yang, Zedong Liu, Weiwei Zhao, Weisheng

第一作者：Feng, Qiang

通信作者：Feng, Q[1]

机构：[1]Shandong Univ Sci & Technol, Shandong Key Lab Civil Engn Disaster Prevent & Mi, Qingdao 266590, Peoples R China;[2]Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Peoples R China

第一机构：Shandong Univ Sci & Technol, Shandong Key Lab Civil Engn Disaster Prevent & Mi, Qingdao 266590, Peoples R China

通信机构：corresponding author), Shandong Univ Sci & Technol, Shandong Key Lab Civil Engn Disaster Prevent & Mi, Qingdao 266590, Peoples R China.

年份：2021

卷号：35

期号：4

外文期刊名：JOURNAL OF COLD REGIONS ENGINEERING

收录：;EI(收录号：20213210754693);Scopus(收录号：2-s2.0-85112084827);WOS:【SCI-EXPANDED(收录号:WOS:000708121500007)】；

基金：This work was supported by the Natural Science Foundation of Shandong Province (Grant No. ZR2016JL018); Research and innovation team project of College of civil engineering and architecture, Shandong University of science and technology, China (Grant No. 2019TJKYTD02); Project of Shandong Province Higher Educational Young Innovative Talent Introduction and Cultivation Team (Disaster prevention and control team of underground engineering involved in sea); and Guizhou Science and Technology Plan Project (Guizhou Science and Technology Cooperation Support [2019]2882).

语种：英文

外文关键词：Tunnel; Surrounding rock; Cold region; Frost heave deformation; Anisotropic frost heave coefficient; Test apparatus

摘要：Considering the characteristics of the surrounding rock temperature and water replenishing direction of tunnels in cold areas, to study the frost heave deformation law of surrounding rock under a certain stress environment, a nonuniform frost heave test device using a flexible air bag to apply a stable confining pressure was developed. The device includes a loading system, a boundary temperature control system, a water replenishing system, and a testing system. Frost heave tests under both load and no-load conditions were carried out. The results show that: (1) the temperature in the specimens was distributed linearly along the specimen height; (2) the deformation of the specimens along the two directions of the temperature gradient and vertical temperature gradient was divided into three stages, namely, initial deformation, frost heave growth, and deformation stability, but the deformation values differ greatly, showing obvious nonuniform frost heave characteristics; and (3) the stress boundary condition had a significant effect on the frost heaving deformation. With increasing deviatoric stress, the frost heaving in the direction of the vertical temperature gradient increases until it exceeds the frost heaving in the direction of the temperature gradient. Finally, according to the superposition of the load strain and frost heave strain, an equation of the nonuniform frost heave coefficient considering temperature and deviant stress was established, which can provide an experimental basis for accurately establishing the constitutive relations of surrounding rocks and determining the frost heave forces of tunnels in cold regions.