A new method of detecting the vertical bearing capacity for single-pile with high strain is discussed in this paper. A heavy hammer or a small type of rocket is used to strike the pile top and the detectors are used ...A new method of detecting the vertical bearing capacity for single-pile with high strain is discussed in this paper. A heavy hammer or a small type of rocket is used to strike the pile top and the detectors are used to record vibra- tion graphs. An expression of higher degree of strain (deformation force) is introduced. It is testified theoretically that the displacement, velocity and acceleration cannot be obtained by simple integral acceleration and differential velocity when long displacement and high strain exist, namely when the pile phase generates a whole slip relative to the soil body. That is to say that there are non-linear relations between them. It is educed accordingly that the force P and displacement S are calculated from the amplitude of wave train and (dynamic) P-S curve is drew so as to determine the yield points. Further, a method of determining the vertical bearing capacity for single-pile is dis- cussed. A static load test is utilized to check the result of dynamic test and determine the correlative constants of dynamic-static P(Q)-S curve.展开更多
In recent years, China has fully developed in output, quality, and technical advancement of refractories, and become the biggest country in refractories production and consumption in the world. Meanwhile, education an...In recent years, China has fully developed in output, quality, and technical advancement of refractories, and become the biggest country in refractories production and consumption in the world. Meanwhile, education and training in China＇s refractories industry have developed rapidly. This paper introduces the present situations of undergraduate education, postgraduate education, academic education, and vocational and other training of China＇s refractories industry＇, including the student recruiting situation, subject arrangement, teachers .force, and R ＆ D equipment level, and also puts forward some suggestions for China＇s refractories education and training.展开更多
文摘A new method of detecting the vertical bearing capacity for single-pile with high strain is discussed in this paper. A heavy hammer or a small type of rocket is used to strike the pile top and the detectors are used to record vibra- tion graphs. An expression of higher degree of strain (deformation force) is introduced. It is testified theoretically that the displacement, velocity and acceleration cannot be obtained by simple integral acceleration and differential velocity when long displacement and high strain exist, namely when the pile phase generates a whole slip relative to the soil body. That is to say that there are non-linear relations between them. It is educed accordingly that the force P and displacement S are calculated from the amplitude of wave train and (dynamic) P-S curve is drew so as to determine the yield points. Further, a method of determining the vertical bearing capacity for single-pile is dis- cussed. A static load test is utilized to check the result of dynamic test and determine the correlative constants of dynamic-static P(Q)-S curve.
文摘In recent years, China has fully developed in output, quality, and technical advancement of refractories, and become the biggest country in refractories production and consumption in the world. Meanwhile, education and training in China＇s refractories industry have developed rapidly. This paper introduces the present situations of undergraduate education, postgraduate education, academic education, and vocational and other training of China＇s refractories industry＇, including the student recruiting situation, subject arrangement, teachers .force, and R ＆ D equipment level, and also puts forward some suggestions for China＇s refractories education and training.
