Applied Mechanics and Materials Vols. 71-78

Abstract: The dump is the important part in the open colliery. Slope should bring the huge loss without effective forecast during the work. Many methods have been used in the slope stability analysis to escape the slope. In this paper, the methods used in the analysis have been list and forecast reasearch should be discuss.

Abstract: The promotion of green building has significant contribution to the implementation of sustainable development principles. And with the enhancing awareness of environment protection, green building becomes the trend of the construction industry. While its promotion is still very difficult, the major barrier affecting the application of green strategies is the high initial cost. So the incremental costs and benefits in the life cycle of green building are identified and described by math equations in this paper. Furthermore, the evaluation indexes of incremental cost-benefit analysis, considering the social benefits and environmental benefits, are given to evaluate the economy of green project, which is of certain practical significance.

Abstract: Tender offer is very important to the construction enterprises in the bidding process. So how to identify the individual cost objectively and efficiently is studied in the essay. The relations of social average cost and individual cost, the factors affecting the individual cost and the difficulty in ascertaining the cost in the bidding process are analyzed. Grey RBF neural network model is built combining with the cost index to obtain the social average cost. The Analytic Hierarchy Process model is made to analyze the rate of each factor affecting the individual cost through expert system. On the basis of the social average cost combining with the affecting rate of each factor, the individual cost could be judged. This method is of practical significance and proved effective through a living example. The conclusion could provide reference for construction enterprise to select the bidding strategy.

Abstract: Simulate the heat and mass transfer in 2D cases using fluent software and analyse the results of simulation. Summarize the reasons of neglecting the nature convection under the small Ra number, Furthermore state good thermal retardation properties of porous medium in building.

Abstract: Based on the simplified analytic model of asymmetric mining rock beam-pillar system, the catastrophe model of dynamic failure of the rock beam-pillar system in asymmetric mining has been established by way of the differential form of total potential function deduced by law of conservation of energy. Analysis and illustration show it is consistent in discriminating the system stability by energy importing rate J—presenting the descending or increasing tendency. Outside or suroundings imports energy into rock beam-pillar system when J> 0; and the system exports energy to outside or surroundings when J<0.J=0 is the critical condition of system destabilization,which implicates Cook stiffness criterion and is a dynamic generalization of Cook criterion in the form of energy.

Abstract: Through an example from an architectural practice, the thesis argued that both the time and regionality should be taken into consideration in city planning and architectural designs. Meanwhile it offered three solutions from aspects of overall decision and space logic, cultural factors and form logic, environment-concerned treatment and construct logic to optimize and advance the design conceptions, so as to give the design necessary guide and reference.

Abstract: The principles of the continuous test methods for compaction degree is introduced based on subgrade engineering cases. The compaction parameter CMV associated with subgrade compaction is obtained through spectrum analysis on the response of a vibratory drum during compaction operations. Comparative analysis is conducted on CMV and the in situ test index E_vd, which verifies that the continuous test index CMV has a high reliability and a good correlation with E_vd and can objectively and comprehensively reflect the subgrade compaction quality and provides necessary basis for the application of the continuous quality test methods for subgrade.

Abstract: Gravel content is an important factor affecting the mechanical properties of clay-gravel mixtures. To study the effects of gravel content on the shear strength of clay-gravel mixtures, constant-strain-rate drained triaxial compression tests were conducted for various mixtures. The gravel contents were 30%, 40%, 50% and 70%. The confining pressures were varied from 50kPa to 300kPa. Test results indicate that the deviator stress at failure under the same confining pressure increases with the increase in gravel content. As the gravel content in the mixtures is between 30% and 50%, the shear strength is jointly attributed by clay and gravel. An increase in gravel content results in slight increases in both the cohesion intercept and internal friction angle. At gravel content of up to 70%, the shear strength of the mixture is controlled by that of the gravel, and the cohesion intercept and the internal friction angle increase sharply.

Abstract: According to strategic aim of great development in national culture and aspiration of constructing cultural city in planning scholar-circles, this theory discusses the issue of urban sustainable development in the condition of restriction in natural resources. This framework integrated the both of qualitative and quantitative research in order to realizing the aim of constructing the cultural paradigm theory in urban-rural spatial planning research. This paper presents the complicated system theory in urban-rural spatial structure and morphology based on cultural connotation, interprets culture in terms of anthropological connotation and fundamental philosophical categories, sets up logical structure of culture, presents hierarchy of needs theory based on cultural structure, builds the relevant models of cultural structure-dynamics and urban-rural spatial structure and morphology. This paper presents theory in urban developmental history based on cultural interpretation, establishes prospective theory in green building and eco-homeland based on cultural concepts.

Abstract: The subject of this paper is fundamental conception and theory of nature. This paper tries to throw new light on the themes of natural experience in itself, its logical structure and law, its principle and prerequisite, as well as the contradiction of natural experience in itself. In general the conception of nature in science which is regarded irrelevant to subjective meaning has not origin of logic and can not stand firm. In the terms of unity of subject and object, this paper tries to interpret the meaning of fundamental natural conceptions logically, set up the corner stone of scientific buildings. The theory of natural philosophy is a mega-theory of green building and eco-homeland.