Advanced Materials Research Vols. 718-720

Abstract: We frist establish the evaluation index system according to the characteristics of the simulation training system through analysis, and second , we calculate the index weight use improved gray analytic hierarchy process which simplify the steps of the original analytic hierarchy process. Third we use the Delphi method to establish the membership degree of every evaluation index, and finally we use fuzzy comprehensive evaluation method to get the evaluation results of the simulation training system, the results show that the evaluation model is consistency to the expert assessment , meet the actual needs, is an effective method of power system simulation training assessment.

Abstract: The difficulty elements of group C has become an important part of the competitive aerobics with its development. The author is trying to propose a scientific method as a theoretical foundation for coaches to train. The way is to analyze both the movement time-phase about difficulty elements of the group C, and its sport biomechanics in 3 stages, which are take off, flight and landing.

Abstract: With the publication of Standard test methods of bitumen and bituminous mixtures for highway engineering " in 2011, the common asphalt mixture rutting test can be carried out in accordance with the T0719-2011 in China. But in our country, the current " Technical specifications for construction of highway engineering asphalt pavement " published in 2004 describes that the nominal maximum size of more than 19mm dense-graded asphalt concrete or asphalt treated permeable base is not suitable for carrying out specimens rutting test in accordance with the size of 300mm× 300mm ×50mm, so there is no corresponding dynamic stability requirements to the commonly used AC-25 type asphalt mixture in pavement layer in China. Combined with the Dao-He expressway pavement structure design and used the T0719-2011 method of AC-25 type different thickness rutting test, the relationship between the rutting specimen thickness and the dynamic stability is established. With reference to the requirements of asphalt pavement construction specifications and pavement structure layer on high temperature stability, the 8cm thick AC-25 common asphalt mixture dynamic stability criteria is put forward. Analyzing on AC-25 with No. 50 pure asphalt mixture dynamic stability test data, the dynamic stability requirements is put forward as validation for AC-25 asphalt mixture dynamic stability criteria in Dao-He expressway.

Abstract: In this paper, through the study of the marine conditions of structural facilities applications, in order to reduce the corrosion of marine structural facilities, Asked the neural network algorithm combined genetic algorithm to determine the components of the coating to the development of composite scales heavy anti-corrosion coatings, it has interpenetrating polymer network structure (IPN). Experimental results show that the composite scales heavy anti-paint adhesion, excellent corrosion protection, easy to use marine engineering, field operating conditions used, and its sources of raw materials widely,modulation process is simple, easy to mass production and application, can be reduced to some extent marine the cost of structural facilities for anti-corrosion.

Abstract: Due to setting of the bearing push-extend reamed of the Push-extend Multi-under-reamed Pile, the stress of soil that the upper and bottom of the bearing push-extend reamed changes at the state of compression. So there are unreasonable parts in the present formula of ultimate bearing capacity of the single pile. The ultimate bearing capacity of the soil around the Push-extend Multi-under-reamed Pile is decided, in the article, according to the failure principle of soil and the theory of sliding line, at the same time, to combine the theory of plasticity potential energy with the principle of imaginary. So the calculating model of calculating end resistance and side friction resistance of pile is corrected and perfected and the up-to-date formula of ultimate bearing capacity of the single pile is put forward at the compression.

Abstract: Currently, the soil-aggregate mixture has been widely used in some large-scale site preparation projects, compaction characteristics has been pay more attention by many engineers and researchers. However, systematic research is insufficient on how to choose the filler. Moreover, some industry regulations are different on the requirements about filler. This paper relies on a certain big site preparation projects, discussing statistical characteristics and correlation on the maximal grain size, contents of the coarse grain, gradation and other parameters of soil-aggregate mixture. The results show that the maximal and the median grain size have small discreteness and normal distribution, indicating site filler is easy to reach the requirement; The coefficient of curvature, coefficient of nonuniformity and the coarse grain content have large discreteness, and dont obey normal distribution, indicating the filler has large variability. The median grain size is highly relevant to the coarse grain content; the maximal grain size isnt relevant to the coefficient of nonuniformity, the coefficient of curvature and the coarse grain content. According to the results of correlation analysis, we suggest that the importance order follow by coarse grain content, the maximum grain size and gradation for the control parameters of filler. This research may be significant to other similar projects.

Abstract: In this paper, the background is Qingdao Cross-harbor Tunnel Guide Line Project. The research on blasting vibration peak velocity was carried out by monitoring a 6-layer brick-concrete building. According the research, we discover that vibration peak velocity in the vertical direction reaches a maximum on the roof of the building. In the horizontal radial and tangential horizontal direction, the maximum appears at the 1st or 2nd floor. Third, within certain distance from blasting center, the value of horizontal vibration peak velocity is larger than vertical vibration peak velocity.

Abstract: This research carried out field tests on nine vertical anchors to investigate their behavior in gravel of Taichung Basin. An anchor can be categorized as a deep anchor when the free length Z exceeds 8D (D is the diameter of the anchor). The shape of the heave on the ground surface of a shallow anchor is similar to a normal distribution curve. The extended diameter of the heave was between 170 and 300 cm, which could be divided into two zones, primary and secondary, based on the failure mode of the ground. As the fixed length of a shallow anchor increased, the extended diameter also increased. The ultimate load of an anchor increased with the free length and, to a greater degree, with the fixed length of an anchor: a fixed length of only 3 m (D = 0.12 m) generated an ultimate load of over 1100 kN.

Abstract: In this paper, the research background of soilbag technique applied in the middle route of the South-to-North Water Transfer Project (SNWTP) is first described along with the reinforcement principle of soilbags. The loading deformation characteristics of the foundations for the marl, large-soilbag and small-soilbag are then discussed according to the in-situ load tests. The testing results indicate that the soilbag can improve the compression deformation characteristic of marl foundation significantly. The loading stiffness values of the marl, large-soilbag and small-soilbag foundations are about 16 to 18, 20 to 40 and 30 to 90 MPa/m respectively. Within the load range from 0 to 450 kPa, the loading and unloading p-s curves of soilbags consist of two parts, namely the perfectly elastic zone and the elasto-plastic zone. The unloading stiffness of soilbags is nearly 2 to 10 times greater than the loading stiffness. In addition, the mechanical rolling process can, to some extent, improve the compressive property of the soilbag foundation.

Abstract: The old oilfield in eastern China has conducted several rounds of seismic exploration. Artificial blasting inevitably layout into town and city building dense area. Quaternary alluvial plains in loose sand, the local large brick structure housing affordability study with artificial explosives directly related to the optimization of blasting parameters. On the basis of a large number of focal blasting venue, housing vibration test data, combined with the near-surface structure and brick structure housing construction characteristics. It focused on analysis different explosive source caused by blasting parameters venues and housing vibration displacement, velocity, acceleration amplitude, frequency characteristic parameters, duration, and vibration direction, summed up the venues and housing vibration response, attenuation relationship, housing construction vibration characteristics and seismic performance. The results show that, depth change of the blasting based on the ground, housing peak attenuation impact, not changes in dose. Vibration velocity, acceleration, displacement exists obvious amplification effect at 130m and 230m.