Results 51 to 60 of about 906 (240)

Study on the Influence of Initial Water Content on One-Dimensional Freezing Process of the Qinghai-Tibet Silty Clay by Using Digital Image Technology

Geofluids, 2022
The water content of the foundation soil will change dynamically as a result of rainfall, snowfall, and ground surface evaporation, leading to a significant change in frost heave properties of the foundation soil in cold regions. One-dimensional freezing
Yongtao Wang, Boyuan Wang, Shoude Pang, Weihang Hua, Zhiqiang Ji, Dayan Wang   +5 more
doaj   +1 more source

Coupled thermo-hydro-mechanical modeling of frost heave and water migration during artificial freezing of soils for mineshaft sinking

Journal of Rock Mechanics and Geotechnical Engineering, 2022
Artificial freezing of water-bearing soil layers composing a sedimentary deposit can induce frost heave and water migration that affect the natural stress–strain state of the soil layers and freezing process.
M. Zhelnin, A. Kostina, A. Prokhorov, O. Plekhov, M. Semin, L. Levin   +5 more
doaj   +1 more source

Stability of the Foundation of Buried Energy Pipeline in Permafrost Region

Geofluids, 2021
During operation, a buried pipeline is threatened by a variety of geological hazards, particularly in permafrost regions, where freezing-thawing disasters have a significant influence on the integrity and safety of the buried pipelines. The topographical
Yan Li, Huijun Jin, Zhi Wen, Xinze Li, Qi Zhang   +4 more
doaj   +1 more source

Study on Frost Heaving Characteristics of Sulfate-Bearing Sand in Seasonally Frozen Regions

Applied Sciences
With the Longzhong Water Conservation and Ecological Water Supply and Storage Reservoir Project (Upper Yellow River) as the engineering background, this study selected sulfate sandy soil from Jingtai County (Baiyin City, Gansu Province, the project area)
Kaixiang Yang, Qianwang Pan, Kai Ding, Xuansheng Cheng   +3 more
doaj   +1 more source

Water-Rich Soft Soil Freezing Method Combined With Steel Sleeve Receiving-Shield Technology Field Test Research

Frontiers in Earth Science, 2022
The initiation and reception of shields are major risk events for shield construction in water-rich and weak strata. Although the freezing method and the steel sleeve method receiving-shield tunneling technologies both have engineering applications, the ...
Y. Mei, Y. Y. Liu, X. Yan, C. Liang, J. T. Zhu   +4 more
doaj   +1 more source

Numerical simulation study on the evolution of the temperature field and frozen wall in fractured rock mass

Deep Underground Science and Engineering, EarlyView.
The evolution of the temperature field and frozen wall under different fracture conditions was examined by an artificial ground freezing‐based thermal‐hydraulic coupled model. It was observed that fracture inclination affects the interaction extent of freezing pipes and fracture, while phase transition extent is the dominant factor for heat transfer in
Chenyi Zhang, Tingting Luo, Tao Zhang, Tao Han, Xiaodong Zhao, Haipeng Li, Yanfei Ma, Faxing Zhang, Madhusudhan Bangalore Narasimha Murthy, Weihao Yang   +9 more
wiley   +1 more source

Measurement of Suction Pressure Generated in the Process of Frost Heaving in Rock

Journal of MMIJ, 2017
Recently it has been found that frost heave phenomena can be seen not also in soil but also in rock. It is obvious, however, that the number of researches on frost heaving in rock is much less than that of researches on frost heaving in soil.
Dai NAKAMURA, Takayuki KAWAGUCHI, Tatsuya WATANABE, Shunzo KAWAJIRI, Shintaro YAMASAKI, Satoshi YAMASHITA   +5 more
doaj   +1 more source

Advancing mine pillar design: Evaluating traditional methods and integrating AI for enhanced stability of pillars in the Great Dyke, Zimbabwe

Deep Underground Science and Engineering, EarlyView.
B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza, Hendrik Grobler, Peter Apata Olubambi, Moshood Onifade, Manoj Khandelwal   +4 more
wiley   +1 more source

Frost heave tests on tills with an apparatus for constant heat flow

, 1981
Paper presented at the 2nd International Symposium on Ground Freezing, Norwegian Institute of Technology, Trondheim, Norway, June 24—26 ...
Sven Freden, L Stenberg
openalex   +2 more sources

Field frost heave predictions using the segregation potential concept

, 1982
The Konrad–Morgenstern theory of frost heave using the segregation potential concept is briefly outlined, and the method of predicting frost heave under field conditions is reviewed. A recent paper by Nixon et al.
John F. Nixon
core   +1 more source