Results 31 to 40 of about 32,055 (300)
Hydraulic failure by heave and piping [PDF]
Scour and Erosion, 2016 It is generally agreed the same criterion for hydraulic heave and for piping can be used. In vertical upward flow the theory is well established. The weight of the soil must be greater than the seepage force of the water. Despite this well established theory piping and sand boiling occurs at much lower hydraulic gradient than the theoretical value.
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Monitoring and numerical modelling of riverbank erosion processes: a case study along the Cecina River (central Italy) [PDF]
, 2009 Riverbank retreat along a bend of the Cecina River, Tuscany (central Italy) was monitored across a near annual cycle (autumn 2003 to summer 2004) with the aim of better understanding the factors influencing bank changes and processes at a seasonal scale.
Luppi, Laura +4 more
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Hydraulic failure and repair are not routine in trees [PDF]
Annals of Forest Science, 2013 Trees can pull tons of water up to 100 m above ground, whereas even the best engineered suction pumps can manage only 10 m at most. Beyond this height, the pull of gravity exceeds atmospheric pressure. The pressure at the top of the water column then becomes negative, and pumps drain by a process of vaporization called cavitation.
Cochard, Hervé, Delzon, Sylvain
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Cause and analysis of hydraulic pump failure
Journal of Physics: Conference Series, 2021 Abstract After a period of use, the internal parts of the hydraulic pump will be worn one after another, resulting in the reduction of the movement efficiency of the hydraulic pump and various problems. Usually, this is a sign of damage to the hydraulic pump.
Li Shang, Na Wang
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Numerical study failure characteristics of natural fracture under induced stress
Energy Reports, 2023 Hydraulic fracturing is an effective method for developing oil and gas in unconventional reservoirs. The openings of natural fractures directly affect the complexity of the fracture body.
Changgui Xu, Shusheng Guo, Hao Liang
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Continuum Modeling of Hydraulic Fracturing in Complex Fractured Rock Masses
, 2018 In this chapter we present and demonstrate the use of a continuous approach to model hydromechanics and hydraulic fracturing of complex fractured rock masses.
Jonny Rutqvist +7 more
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Analysis of wave clipping effects of plain reservoir artificial islands based on MIKE21 SW model
Water Science and Engineering, 2019 Plain reservoirs are shallow, and have low dams and widespread water surfaces. Therefore, wind-wave-induced damage to the dam is one of the important factors affecting the safety of the reservoir.
Yan Xiang +4 more
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Measuring method for membrane penetration capacity of coarse-grained soil in triaxial tests
Yantu gongcheng xuebao, 2021 The membrane penetration effects displayed in the coarse-grained soil tests will distort the measurement of volume deformation of samples, thereby affecting the measuring accuracy of strength and deformation index.
XU Wei-wei 1, CHEN Sheng-shui 1, 2, FU Zhong-zhi 1, 2, JI En-yue 1, 2
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Numerical model for breach of concrete face sand-gravel dams due to overtopping
Yantu gongcheng xuebao, 2019 Based upon the data of field investigations and back analysis of centrifugal model tests for the beach case of the Gouhou concrete face sand-gravel dam (CFSGD), a numerical model for breach of CFSGD is developed. The major highlights of the model are the
ZHONG Qi-ming 1, 2, SHEN Guang-ze 1
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, 2013 [1] In situ test of hydraulic fracturing (HF) provides the only way to observe in situ stress magnitudes directly. The maximum and minimum horizontal stresses, SHmax and Shmin, are determined from critical borehole pressures, i.e., the reopening pressure
Ito, Takatoshi +21 more
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