Advanced Materials Research Vols. 368-373

Abstract: Regard the mechanics model of key rock stratum in overlying strata as the single-span beam with semi-infinite length elastic foundation support. Based on elastic foundation beam theory, derive the analytic solution about inner force distribution of overlying strata. Then analyze the variation law of maximum value of bending moment and its location of overlying strata followed by beam space and relative rigidity. Through the research and analysis, the relationship between the elasticity of elastic foundation and the stress field of digging area is elaborated.

Abstract: Analyzing mechanism and conditions that cause seepage failure during deep foundation pit dewatering, some measures of controlling seepage failure are put forward in design and construction of foundation pit. Good results have gotten with these measures in a foundation pit. This paper provides references for foundation pit dewatering and relative study.

Abstract: 16 items of assessment indexes are selected to build up the safety risk assessment index system of special maintenance project according to the construction safety characteristics of highway special maintenance project, based on which, the safety risk assessment model of special maintenance project based on BP neural network is brought forward. The assessment model has been trained, checked and analyzed through example and it turns out that the effective safety risk assessment of highway special maintenance project can be calculated based on this model, which also supplies decision-making basis for the project safety management.

Abstract: In the present paper, the fuzzy probability method is applied to assess the risk of international engineering project. Firstly, According to the risk from the whole cycle of international engineering project, The influential factors of the project bidding risk assessment are analyzed. The risk of international engineering project is divided into four parts, such as national risk, industrial risk, involved parties risk and project’s risk, and an assessment index system of international project risk is constructed. Secondly, based on the fuzzy probability method, a new model of the risk assessment for international engineering project is developed. In order to assess index weighted value scientifically, the analytical hierarchy process (AHP) is introduced into the fuzzy weighted values. Finally, the validity and rationality of the risk evaluation for international engineering project is verified through the risk instance of a project.

Abstract: Based on statistical yearbook data in Nanchang city, this paper applies a calculation mode of ecological footprint to conduct calculation and analysis on the ecological footprint, as well as bearing capacity of Nanchang city-the core city of Poyang Lake Ecological Economic Zone from the year 2005 to 2009. According to some research, the average ecological footprint of Nanchang city in recent five years is 1.974879hm2/cap, the average ecological bearing capacity is 0.224917hm2/cap, and the average ecological deficit is 1.749962hm2/cap.Regional eco-environment is in the condition of unsustainable development. This paper also makes an analysis on the intensity of ecological footprint and ecological efficiency in Nanchang city. By taking these as a foundation, this paper puts forward strategies and suggestion to reduce ecological deficit of Poyang Lake Ecological Economic Zone and achieve sustainable development in this zone.

Abstract: In our country, Subjects of fire risk management are the public security fire department, the insurance company and the owner. This thesis analyzed the subjects of fire risk management and their correlation, used the Game theory on the Game relationships of the three subjects, focused on analyzing the cooperation Game relationship between the public security fire department and insurance company.

Abstract: After statistical data of Registered Constructor Examination in 2009 have been gathered, the detailed analysis of examination was carried out. Distinction and scoring rate and these relationships of the examination paper researched, statistics result show that too easy and too difficult questions have very low discrimination. Based on statistical data, two prediction formulas on pass rate are presented. A coefficients was presented that could evaluate the overall quality of examination papers, which was used to evaluate the public examinations of Registered Constructor Examination 2009. Characteristics of high and low distinction questions are analyzed that has some significance to the proposition work of Registered Constructor Test.

Abstract: Although the Chinese constructor system has already begun to receive efforts, there are still some shortcomings and questions existing in development procedures. This paper intends to analyze those problems and make effort to find the solutions of those questions.

Abstract: The mechanical properties of rubber gasketed joints in segmented pipeline are studied in this paper. The analytical results show that the axial tension of flexible joints is mainly effected by the friction between the pipe and the rubber ring in flexible joints, and the bending property is mainly controlled by the hyper-elastic performance of rubber gasketed and the geometry clearances designed at the pipe joints. Based on the test results, rubber gasketed joints are effective in providing a leak proof and flexible connection for jointed buried pipelines.

Abstract: The research analyzed Pangzhuang mining site as case study and studied the current situation of the site from varies aspects, such as land use, economy and transportation system etc. Some strategies are further developed to recycle the declined mining site. The objectives of the mining site regeneration are established based on the study. The recycle planning contents are further elaborate from three aspects of function layout, industry development and road system. According to the planning objectives, the paper summarizes short term and long term targets.