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January 30,2011
Volume 4,Issue 2
Pages -
Subject Area:Architectural Design Method and Theory,Decoration Engineering,Heating and Gas Supply Engineering,Basic Subject of Civil and Architectural Engineering, Engineering Mathematics, Engineering Mechanics,Concrete and Reinforced Concrete Structures,Engineering Structures,Foundation Engineering,Hydraulic Engineering Management,Hydraulic Engineering Construction,Environmental Water Conservancy

Title: Study on public evaluation of landscape nodes in city park

Authors: WANG Jing, XU Feng
PP: 177-182
Abstract: For the important position of landscape nodes in city park and the improvement of viewers’ visual perception, and based on the evaluation methods used in landscape planning and design, the paper proposed the evaluation method of landscape nodes in city park by combining questionnaire and statistic software controlled by evaluation factors, so as to obtain guidance for the future design and build through the scientific survey and analysis. Furthermore, this paper discussed the critical applications and operational ways of questionnaire and statistic software in public evaluation research of landscape nodes in city park, namely the design of questionnaire in which Likert scale was adopted and the process control of questionnaire survey, and data transformation of public evaluation information, analysis method selection and result explanation in quantification analysis.
Keywords: urban planning and design; city park; landscape nodes; public evaluation; questionnaire survey; quantification analysis

Title: Information times landscape planning renovation: Analyzing computer technology value from the point of design methodology

Authors: YU Hui
PP: 171-176
Abstract: From the point of design methodology, quick development of computer technology has influences on the actions of landscape architecture design, such as renovation of traditional design conception, new ways of form and originality, and checkout action of landscape architecture planning and design. It has practicality value of determining computer technology values in landscape architecture design and thinking. The paper point out landscape architects should build up the design philosophy in their mind.
Keywords: landscape architecture; design methodology; computer technology; landscape architecture planning and design; design philosophy

Title: Rainwater pollution on building and elimination method

Authors: HU Yonghua, JIANG Hua, WU Jinzhe
PP: 168-170
Abstract: This paper researches the reasons and elimination method of rainwater pollution on buildings from technical and artificial view points. The rainwater pollution on large roof eaves, exposed window, balcony, and other protruding parts is because that these parts have deposition surfaces. Pollution of parapet walls and billboards is mainly because that the rain erodes the steel,and washes the rust to the wall surfaces. The design, construction, materials supply, management and other factors also play a role. Aiming to the above reasons, various measures are taken to control the pollution, and beautification effects are achieved.
Keywords: science of architectural technology; rainwater pollution; reason; elimination

Title: Technical and economic optimization of solar heating system for energy-saving residence buildings with f-chart method

Authors: WU Zhaowu, TIAN Qi
PP: 161-167
Abstract: Taking Taiyuan as an example, the economy of the solar heating system for 50% energy-saving residence buildings in the life period is calculated with f-chart method, and the optimum solar fraction of this region is 43.85%; and based on that, the impact on the economy of the whole system from the collector price changes is analyzed, the result is that the maximum saving and the optimum solar fraction increase with the decrease of the collector price, when the collector price drops by 11.11%, the maximum saving increases 84.33% and the optimum solar fraction is up to 53.5%.
Keywords: heating; solar energy; f-chart method; solar fraction; energy-saving residence buildings; technical and economic optimization

Title: Mode-superposition solution of coupled vibration between vehicle and bridge

Authors: YANG Yuemin
PP: 155-160
Abstract: The time-varying problem of coupled vibration between vehicle and bridge is analyzed in detail. In the setting up of the vibration equations, geometrical coordinates are adopted for the vehicles. To the bridge structure, it is well known that its vibration is mainly demonstrated by its lower basic vibration modes. If the vibration is presented by its lower basic modes, or the characteristic coordinates in mathematics, and on which the vibration equations of the bridge and the vehicles are set up, then the equations can be greatly simplified by largely reducing the degrees of the freedom, and the iteration between can be avoided. At the same time, a good accuracy can be obtained. That is the objective this paper to achieve.
Keywords: basic science of civil engineering; superposition solution of vibration modes; numerical calculation; lower basic vibration modes; simplified calculation

Title: A new damage detection index of reinforced concrete simple beam

Authors: ZHOU Haixia, YAN Weiming, WANG Zhuo
PP: 149-154
Abstract: This paper is about the study of the common reinforced concrete simple beam. The experiment uses static loading test to simulate simple beam damage accumulative process, collects simple beam's free vibration signal from the shock load experiment, and analyzes the change mechanisms of damping parameters. The paper demonstrates the existing theory according to the experiment results and proposes a new theory of damage identification based on the damping characteristic. The investigation provides valuable references for the fast and non-destructive identification of reinforced concrete simple beams.
Keywords: concrete and reinforced concrete structure; damage identification; vibration testing; damping characteristics; new damage index β

Title: Discussion on the mechanical characteristics of three kinds of steel plate-concrete composite shear walls

Authors: ZHU Limeng, XIAO Hongmei, ZHOU Deyuan
PP: 142-148
Abstract: This paper wrote three kinds of steel plate-concrete composite walls that were concrete-steel-concrete composite shear walls (CSC walls), concrete-steel composite shear walls (CS walls) and concrete-steel-concrete composite shear walls (SCS walls) which were classified according to the relative position of steel plate and concrete. On the basis of the present research finished in this field, a comparative analysis of their respective mechanical characteristics was made. Concrete-steel-concrete composite shear walls and concrete-steel composite shear walls make good use of the stiffness out of plane of the concrete plate avoiding buckling of steel plate, but fail to use the stiffness in plane and capability of the concrete plate resulting in load increasing. Concrete-steel-concrete composite shear walls can fully utilize the properties of these two materials because the concrete bond by the steel plate is in triaxial compression and can protect the steel plate from buckling too quickly.
Keywords: steel-concrete composite structure; buckling; triaxial compression; the stiffness out of plane; concrete-steel-concrete composite shear walls

Title: Research on reinforcement and rectification of high voltage transmission towers erected above goaf

Authors: CHEN Jianfei, XIA Junwu
PP: 137-141
Abstract: To eliminate the damage to secure operation of high voltage (HV) transmission line which is caused by exploitation of coal mine, the general features of coal goaf ground deformation, the impact of coal mining on HV transmission towers, the analysis of the reinforcement and rectification scheme of tower footing and body when ground deformation happens in goaf, the comparison of two kinds of schemes of reinforcement and rectification of coal goaf transmission tower, and the governance programs used at home and abroad are studied in depth. A tentative idea of a kind of technology to reinforce and real-timely rectify the transmission towers erected above the goaf is put forward. By using the principle of communicating vessels, real-time deviation-correcting technology will connect the tower footings as a whole, and timely eliminate or reduce the influence of uneven subsidence on tower. And an integrated program of reinforcement and real-time rectification of HV transmission towers is recommended to reduce the cost of reinforcement and rectification of transmission tower further, and safeguard the safety of transmission tower better and more timely.
Keywords: structural engineering; reinforcement and real-time rectification; law of communicating vessels; coal-mining area; transmission tower

Title: Model test for single jacked pile and grouting surrounding pile in sandy soil

Authors: XU Shixiong, LIANG Renwang
PP: 129-136
Abstract: Features of model of static and side grouting jacked piles are studied and analyzed by simulation experiments in the laboratory. After that, some conclusions and regularity are summed by the simulation experiments about static and side grouting jacked piles. Then some theoretical basis is provided on the technology. At the same time some reliable information about it is proposed for enhancing the further understanding of the principles of its role and future application.
Keywords: foundation engineering; sandy soil; jacked pile; grouting surrounding pile; model test; side friction resistance

Title: Double shear stress multi-parameter criteria and its corner model

Authors: YUE Na, KUANG Lianfei
PP: 120-128
Abstract: This paper is based on double shear stress criterion and generalized double shear stress criterion, and further considered geotechnical material strength properties in partial plane and tension and compression on the different meridians of metal materials. It is concluded that the change rule of geotechnical materials suitable for describing the double shear destruction rule multi-parameter criteria. At the same time, in order to computer processing plastic strain increment of convenient, angular point repair round was applied to double shear stress multi-parameter criterion, and the corresponding corner model was obtained.
Keywords: geotechnical engineering; double shear stress; three parameter criterion; four parameter criterion; five parameter criterion; corner model

Title: Study on large strain consolidation settlement of soft clay layer induced by variations of water level and construction loads

Authors: HUANG Dazhong, XIE Kanghe, TAO Liwei, WANG Yulin
PP: 113-119
Abstract: Based on the general theory for 1-D large strain consolidation of saturated soft clay, analytical solution was obtained when groundwater level variations and construction loads occured at the boundary. The large strain consolidation behavior of soft clay was carefully calculated and analyzed through a practical example. The differences from the small strain consolidation behavior were presented in detail. It was believed that the dual effects of construction loads and groundwater level variation couldn't be simulated by traditional linear superposition. It was more reasonable to use the solution in the paper.
Keywords: geotechnical engineering; consolidation loads; groundwater level variation; large strain consolidation; analytical theory

Title: Study on supervision in the filling of a concrete face rockfill dam

Authors: ZHANG Qiyong, ZHANG Xiaoliang
PP: 109-112
Abstract: The practicable and effective supervising work is the powerful guarantee of hydro-engineering construction. The smooth proceeding of supervising work not only depends on the full-scale personnel and equipments, but also depends on the overall hold and effective management about the characteristic of the engineering and the work progress of the builder. Taking a dam filling of a hydro-project as example, the supervising work of the project is analyzed, which is difficult and goes on wheels by the effective adjustment. By analyzing the supervising work during filling the dam, the processing way of key point and difficult point in the supervising work is summarized. This study supplies some references for the future work.
Keywords: hydraulic management; hydro-junction project; supervision work; quality control; filling of dam

Title: Application of suspended bailey frame in the construction of elevated aqueduct more than thirty-three meters

Authors: WANG Kaijun, LI Chengfang, LIU Chengbin, YANG Xiaohong
PP: 101-108
Abstract: According to the structure characteristic of aqueduct and restriction of actual engineering’s geological conditions, in order to save the engineering cost and simplify construction program, with rigorous calculation and unceasing experimental study, the suspended simply-supported Bailey frame system as the system construction method of the formwork support was worked out. This method successfully realized high efficient and low cost construction of the river-crossing elevated aqueduct, and provided reference for similar project construction.
Keywords: hydraulic engineering construction; cantilevered support beams Bailey; elevated aqueduct; construction applications

Title: Surface water evaluation and main contaminants analysis in Xinyang

Authors: DONG Jieying, CHEN Qihui
PP: 94-100
Abstract: This paper aims at evaluating the surface water and analyzing the main contamination in Xinyang. Based on the remote sensing image in 2005 and surface water quality dataset from 2001 to 2007, the evaluation and analysis was made by using ArcGIS, soil and water assessment tool (SWAT) model and other methods such as comprehensive index method and equivalent pollution analysis method. The results showed that the comprehensive pollution index decreased first and then increased by comparatively big change rates from 2001 to 2007. The main indexes exceeding standards were NH3-N, BOD5 and TP. Point source pollution was alleviated during the five years while paper, fertilizer industries were the major polluting industries. N, P loss from farmland fertilizer is becoming the main reason for water pollution. Surface water of Pipashan, Pingqiao sites was seriously polluted by point source contaminants; Changtaiguan, Nanwan, Shishankou sites were only affected by non-point source pollution, whose water quality was comparatively good; Minggang and Xixian sites were affected synthetically by point and non-point source pollution. The surface water there had reached heavily polluted degree.
Keywords: hydrology and water resources; surface water pollution; comprehensive index method; equivalent pollution load method; Xinyang

Title: Research development and prospect of nitrogen and phosphorus transport-transformation in farmland soil

Authors: XIA Ting, HONG Lin
PP: 87-93
Abstract: The research development of nitrogen and phosphorus transport and transformation at home and abroad are reviewed and summarized in this paper, the theoretic researches and modeling methodologies are studied on the basis of research achievement review in this field, the problems existing in the research are analyzed, and the research trends in the fields related are prospected. Through analyses of the main problems currently exiting in the fields related, the research directions are put forward: considering influences of multiple factors, integrating temporal-spatial variations and scaling effects, and combining theoretical research with modeling and experimental monitoring techniques, and widely applying key techniques such as “3S” techniques to improve theoretical and modeling research levels, effective control leaching losses of nitrogen and phosphorus from farmland, and to realize sustainable development of agriculture.
Keywords: environment hydro-science; farmland; reviews; soil; nitrogen and phosphorus; transport; transformation

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