The Development Law of the Freezing Temperature Field of a Calcareous Clay Layer
Joint Authors
Wang, Zhi
Du, Meng
Rong, Chuanxin
Liu, Xiangyang
Ma, Maoyan
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-10-24
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
The problem of “difficult” freezing of the calcareous clay layer fractures in freezing pipes has been investigated.
Based on the engineering background of the deep calcareous clay in the Yangcun Mine, model tests were carried out in order to conduct in-depth research on the development law of the freezing temperature field of this clay layer.
The test results have shown that the calcareous clay has a freezing point of −1.3°C under the action of both the water and the soil’s chemistry and the supercooling temperature can be as low as −3.8°C because of its complex mineral composition causing poor thermal conductivity.
This means that the calcareous clay will freeze slowly than the other layers of the soil.
The time taking for the temperature fields to intersect is 2.5 h, which is equivalent to 127.6 days in the actual engineering.
In the three sections, each temperature measurement point in the temperature field had an irregular saddle shape in the temperature space at the same time, and the ratio of the time between the formation and total melting of the frozen wall was 1 : 1.91.
The development speed of the thickness of the frozen wall from 5 h to 16 h was 17.9 mm/h, and the development speed from 16 h to 70 h was 1.96 mm/h; corresponding to the actual development speed of the thickness of the frozen wall which were 0.0123 m/d and 0.0014 m/d, respectively.
These speeds were significantly slower than the development speed of the thickness of the freezing wall of the general sandy clay layer, which were 0.0515 m/d in the early stage and 0.02 m/d in the later stage.
The thin thickness and low strength of the frozen wall of the calcareous clay layer cause the fracture of the frozen pipes, which should be paid attention to in actual engineering construction.
American Psychological Association (APA)
Wang, Zhi& Rong, Chuanxin& Du, Meng& Ma, Maoyan& Liu, Xiangyang. 2020. The Development Law of the Freezing Temperature Field of a Calcareous Clay Layer. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1194718
Modern Language Association (MLA)
Wang, Zhi…[et al.]. The Development Law of the Freezing Temperature Field of a Calcareous Clay Layer. Mathematical Problems in Engineering No. 2020 (2020), pp.1-12.
https://search.emarefa.net/detail/BIM-1194718
American Medical Association (AMA)
Wang, Zhi& Rong, Chuanxin& Du, Meng& Ma, Maoyan& Liu, Xiangyang. The Development Law of the Freezing Temperature Field of a Calcareous Clay Layer. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1194718
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1194718