Results 181 to 190 of about 16,972 (255)

Control techniques for creep deformation of surrounding rock in deep underground roadways. [PDF]

PLoS One
Ge L, Liu D, Tao J, Zhang Z, Lei H, Zhao Y.   +5 more
europepmc   +1 more source

Research on Predicting the Safety Factor of Plain Shotcrete Support in Laneways Based on BO-CatBoost Model. [PDF]

Biomimetics (Basel)
Yuan H, Ji S, Zhu C, Wang L.
europepmc   +1 more source

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Reducing Calcium Dissolution in Tunnel Shotcrete: The Impact of Admixtures on Shotcrete Performance.

Langmuir
Groundwater infiltration into tunnels causes water to percolate through the fissure channels in the initial support shotcrete. This results in the dissolution and outflow of calcium hydroxide, a key product of cement hydration. This process significantly
Yueping Tong, Chongming Tian, Fei Ye, Yin Jiang, Junyuan Zhang, Xingbo Han   +5 more
semanticscholar   +1 more source

Effect of fine aggregate on fluidity and mechanical strengths of wet shotcrete

Advances in Cement Research, 2023
Air entrained wet shotcrete improves the pipeline transportation efficiency of concrete, besides, the characteristics of fine aggregate have different effects on the fluidity and mechanical properties of air entrained wet shotcrete. In this paper, mainly
Lianjun Chen, Jiahao Sun, Guoming Liu, Chunkui Li   +3 more
semanticscholar   +1 more source

Analysis on The Influence Factor of Low-Strength Wet Shotcrete in Frigid Mining Area

Archives of Mining Sciences, 2023
Wet shotcrete technology is being gradually used in roadway support in frigid mining areas. Thus, problems such as low strength, fragility, and high repair rate have also emerged.
Wei Sun, Zhang Shengyou, Xinglong Feng, K. Hou   +3 more
semanticscholar   +1 more source

A study on the sulfate erosion deterioration law and damage model of shotcrete in high geothermal tunnels

Structural Concrete
When building a tunnel in an environment rich in high‐temperature hot water, it is particularly necessary to pay attention to the influence of sulfate ions in underground hot water on tunnel shotcrete.
Jianjun Tong, Lulu Xiang, Yanshan Cai, Mingnian Wang, Pei Ye, Xingwang Miao   +5 more
semanticscholar   +1 more source

Effect of Fluoride in Alkali-Free Liquid Accelerator on Corrosion of Reinforced Shotcrete by Chloride Ion.

Langmuir
Shotcrete is a crucial component of tunnel engineering. To investigate the impact of fluoride-containing alkali-free liquid accelerators on the structural safety of shotcrete, this study prepared shotcrete using three different fluoride-based alkali-free
Yike Lin, Tingshu He, Yongqi Da, Xiaodong Ma, Z. Wan, Renhe Yang, Qiheng Qu   +6 more
semanticscholar   +1 more source

Toward shotcrete process simulation to support robotic operation

Proceedings of the International Symposium on Automation and Robotics in Construction (IAARC)
- In this study, we introduce a detailed physics-based particle system for simulation of the shotcrete process. The devel-opmentofthisframeworkconceptisinformedbyanextensive literature review encompassing diverse modeling and simulation methodologies ...
Mohammad Reza Yazdi Samadi, R. Waspe, Christian Schlette   +2 more
semanticscholar   +1 more source

Transferring Shotcrete Skills to Robots

International Conference on Biomedical Robotics and Biomechatronics
Traditionally performed by skilled nozzle opera-tors, shotcrete remains a painful and risky task, where recurrent physical discomfort leads to severe and long-term health issues. When performed by novices or ill-trained workers, it can lead to waste. The
Rui Wu, Soheil Gholami, Tristan Bonato, Louis Munier, A. Billard   +4 more
semanticscholar   +1 more source