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Xiang Chen, Jianhua Shen, Xing Wang, Ting Yao and Dongsheng Xu
Coral sand is the main filling material for the island?reef foundation. Under tidal actions, the saturation (Sr) of coral sand layers varies with the specific depths in the reclaimed foundation. Studying the Sr effect of coral sand?s mechanical behaviors...
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Ruchun Wei, Chao Jia, Lele Liu and Nengyou Wu
It is important to determine the volumetric change properties of hydrate reservoirs in the process of exploitation. The Skempton pore pressure coefficient ??
A
can characterize the process of volume change of hydrate-bearing sediments under undrained co...
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Tao An, Dong Wang and Xiurong Yang
Gassy clays containing large, discrete gas bubbles are widely spread in deposits in shallow waters. The existence of gas bubbles may impair the original soil structure, resulting in the instability of offshore foundations and the occurrence of submarine ...
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Lu Liu, Xiaofei Yao, Zhanpeng Ji, Hongmei Gao, Zhihua Wang and Zhifu Shen
This study examines the cyclic behavior of calcareous sand obtained from the South China Sea. A series of undrained cyclic triaxial tests were performed on the calcareous sand with various relative densities, cyclic stress ratios, and effective confining...
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Kuniyuki Miyazaki, Norio Tenma, Kazuo Aoki and Tsutomu Yamaguchi
A constitutive model for marine sediments containing natural gas hydrate is essential for the simulation of the geomechanical response to gas extraction from a gas-hydrate reservoir. In this study, the triaxial compressive properties of artificial methan...
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Mingyuan Wang, Jizhu Sun and Yong Wang
As a kind of partially saturated soil often containing dissolved gas with a high degree of saturation (S > 85%), gassy sand sediment widely exists in the marine environment all over the world. Due to the effect of gas dissolution and exsolution on the po...
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Xinyan Zeng, Wancang Lin, Xinyi Chen and Qinglong Zhou
The Sanshandao Gold Mine is currently in the deep mining stage. The ground pressure on the surrounding rocks is gradually becoming more considerable, and at the same time, threatened by the overlying seawater, the possibility of mine water inrush acciden...
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Kangyu Wang, Zhenhuan Chen, Zhe Wang, Qianshen Chen and Dihui Ma
Calcareous sand is a special marine soil rich in calcium carbonate minerals, characterized by brittle particles. It is, therefore, widely used as a filling material in the construction of islands and reefs. In this study, a series of cyclic tri-axial tes...
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Guangfeng Liu, Zhaoqi Fan, Yang Lu, Siying Li, Bo Feng, Yu Xia and Qimeng Zhao
In this paper, the gas relative permeability considering slippage effect has been experimentally examined under various experimental conditions (i.e., ambient, high confining pressure, and high temperature). Experimentally, Klinkenberg permeabilities of ...
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Syed Samran Ali Shah, Abdul Rahim Asif, Waqas Ahmed, Ihtisham Islam, Muhammad Waseem, Hammad Tariq Janjuhah and George Kontakiotis
Shear modulus (SM) and damping ratio (DR) are significant in seismic design and the performance of geotechnical systems. The evaluation of soil reactions to dynamic loads, such as earthquakes, blasts, train, and traffic vibrations, necessitates the estim...
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Zuxun Zhang, Hongtu Wang, Li Wang and Dongming Zhang
In this paper, we investigated the mechanical and permeability characteristics of water-bearing raw coal samples under in-situ stress, and came to some conclusions, as follows: the peak strength and peak axial strain of samples gradually decrease with th...
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Wenpu Li, Dongming Zhang and Minghui Li
Pore gas has a significant influence on rock strength. This study performed triaxial compression tests of gas-infiltrated sandy shale samples to investigate the strength characteristics under gas pressures of 0 and 2 MPa. The effective stress coefficient...
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Zhixiong Chen, Hongrui Li, Anthony Teck Chee Goh, Chongzhi Wu and Wengang Zhang
Soil liquefaction is one of the most complicated phenomena to assess in geotechnical earthquake engineering. The conventional procedures developed to determine the liquefaction potential of sandy soil deposits can be categorized into three main groups: S...
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Prasad B. Kerkar, Kristine Horvat, Devinder Mahajan and Keith W. Jones
Methane hydrate formation and dissociation kinetics were investigated in seawater-saturated consolidated Ottawa sand-pack under sub-seafloor conditions to study the influence of effective pressure on formation and dissociation kinetics. To simulate a sub...
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Christian Deusner, Nikolaus Bigalke, Elke Kossel and Matthias Haeckel
The recovery of natural gas from CH4-hydrate deposits in sub-marine and sub-permafrost environments through injection of CO2 is considered a suitable strategy towards emission-neutral energy production. This study shows that the inj...
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Qi Wu, Qingrui Lu, Qizhou Guo, Kai Zhao, Pen Chen and Guoxing Chen
The significance of small-strain stiffness (Gmax) of saturated composite soils are still of great concern in practice, due to the complex influence of fines on soil fabric. This paper presents an experimental investigation conducted through comprehensive...
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