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Yao Z.-M.,Anhui University of Science and Technology | Yao Z.-M.,China Coal Construction Group Corporation Ltd. | Chen X.-X.,Anyang Institute of Technology
Tumu Jianzhu yu Huanjing Gongcheng/Journal of Civil, Architectural and Environmental Engineering | Year: 2011

It is difficult to calculate the axial strain of saturated soft clay subjected to long term cyclic loading by using traditional explicit or implicit model. On the base of total stress model of consolidated-undrained shear model of saturated soft clay and considering the shakedown character of clay under small dynamic stress ratio, a shakedown model is set up to calculate the axial accumulative plastic strain. The proposed shakedown model can effectively descript the character of saturated clay displacement under cyclic loading. Because of using the equivalent method, the step of numerical integration can be chosen arbitrarily. The large numbers of calculation can be reduced, so calculation time will be saved considerably.


Xiaoliang Z.,Anhui University of Science and Technology | Huajun S.,China Coal Construction Group Corporation Ltd. | Yelin H.,Anhui University of Science and Technology
Open Automation and Control Systems Journal | Year: 2015

The modeling illustrates the equation of the relation between the temperature of the freezer and the radius of the tjaele, so the horizon tjaele radius can be calculated by the temperature of the horizon freezer. Compared with the single bus temperature sensor system, the former can measure the continuous longitudinal temperature distribution at the spatial resolution of 1m, thus the relevant tjaele radius can be calculated, the same is of the whole longitudinal direction, therefore, the closure plans of ice wall can be examined by the freezer overlay. The thesis firstly gives us an introduction of the construction, working principle and methods of the distributed optical fiber freezer, and then shows some examples. © Xiaoliang et al.


Chen J.-H.,Anhui University of Science and Technology | Yao Z.-M.,Anhui University of Science and Technology | Yao Z.-M.,China Coal Construction Group Corporation Ltd. | Xu Y.,Anhui University of Science and Technology | Wang H.-L.,China Coal Construction Group Corporation Ltd.
Meitan Xuebao/Journal of the China Coal Society | Year: 2013

As the traditional integer order calculus constitutive relation required too many elements and other disadvantages, to apply creep calculation of artificial frozen soil with fractional order calculus relation. Based on the element model, introduced the fractional derivative, to establish the stable creep fractional derivative steady creep model. Using the particle swarm optimization method, through the steady-state creep test data under different load stress, for the creep model parameters identification that established, get the material parameters of creep model. By comparing the experimental results and the calculation of fractional derivative creep model, found that the fractional derivative creep model can simulate the creep law of artificial frozen soil very well. Fractional derivative model is a new calculation method in the field of artificial frozen soil.


Yao Z.,Anhui University of Science and Technology | Yao Z.,China Coal Construction Group Corporation Ltd. | Niu L.,Anhui University of Science and Technology | Xu Y.,Anhui University of Science and Technology | And 2 more authors.
Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition) | Year: 2013

The traditional accumulative pore pressure model of saturated soft clay under cyclic loading can not reflect the phenomenon of principal stress axial deflection. With the determination of consolidation time, under the condition of 100, 150, 200 kPa consolidation pressure, the undrained cyclic loading test with the principal stress axes angle of 15°, 30°, 45° was conducted on soft clay. The effects of confining pressure, the principal stress axis rotation angle and the static deviator stress on cycle cumulative pore pressure were obtained. On the basis of the cumulative pore pressure of the first cyclic loading and the revised dynamic deviatoric stress level, an explicit model was proposed to calculate the cumulative pore pressure of saturated clay subjected to cyclic loading. The validity of the model was verified based on undrained cyclic tests of consolidated soft clay. The parameters were of physical significance and are easy to be obtained. The proposed explicit model could reflect the phenomenon of principal stress axial deflection.

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