Advanced Materials Research Vols. 671-674

Abstract: At present, the research work of landslide monitoring is main focusing on how to adopt new technology and method to realize landslide displacement effective monitoring and data acquisition. Respectively introduces the principle of GPS displacement monitoring system, laser displacement monitoring system and line displacement monitoring system and for solving the problem. Through the technical and economic aspects of than to, it is concluded that the optimum scheme.

Abstract: To solve the high nonlinear mapping relationship between mechanical parameter and rock performance in underground engineering and to improve the uniqueness of optimal result in parameter recognition, a new multi-information intelligent identification method of rock mechanics parameter is proposed. By coupling neural network and genetic algorithm as an evolutionary algorithm, the global and nonlinear optimization search of mechanical parameters in the method is realized. And by building the associated fitness function to absorb multi-information, the method can improve the uniqueness of searched objective as far as possible. Application in Laxiwa underground powerhouse, the largest underground cavern in Yellow River valley, indicates that the intelligent method is very reliable and efficient in identification of rock mechanics parameter and in assistant design of underground engineering.

Abstract: Withing the people’s research for slope address disaster step by step,the traditional slope monitoring methods have become increasingly unable to adapt to the needs of the slope research.The researchers need a more efficient, reliable, accurate method as an effective measure when dealing with the slope monitoring immediately.In the past ten years the rise of GPS technology with its unique high accuracy, speed, all-weather etc into people's vision, and become a new type of high efficient monitoring method.This paper introduces the GPS technology including application background, principle and think GPS monitoring in slope testing practice is worth popularizing.

Abstract: Based on the remaining research results of database and its development software, this article develops the database system of geotechnical engineering exploration for a city using the database management system SQL Server 2005 and vb6.0, and establishes the database tables at all levels, and then advances the more reasonable System Structure, which make the system realize data edition function, information inquiry function, database management function, graph drawing function, data output function and so on. Moreover, the system interface is friendly and the system is easy to operate so that it is convenient for users to study and use, and it achieves good results.

Abstract: The displacement is an important indicator of safety evaluation for highway slope. The highest measurement accuracy of global positioning system (GPS) achieves millimeter, and the sampling frequency can reach 20Hz. The displacement can be solved real-time, and the GPS measuring receiver adapts to the complex and harsh working environment. The paper summarizes the current technology level of GPS application in highway slope monitoring and introduces a low-cost monitoring technology that one receiver assemble multi-antenna to measure several points’ displacement. Based on the application of GPS technology using in highway slope safety monitoring system, this paper set the FuYin Highway as the engineering project and demonstrate how to apple the GPS technology in displacement monitoring and security evaluation.

Abstract: For Magnetic Suspension Gyro-total-station has vulnerable to outside interference factors, there are some random drifting containing in measurements which are unable to establish its mathematical model. Vondrak filter which does not require the model is used to pre-process measurements of Magnetic Suspension Gyro-total-station. In this paper a high-precision astronomical baseline is established in Xi'an, and the gyro azimuth is tested eight times in baseline. 40,000 north-seeking torque of the first and second place is filtered by the Vondrak filter for each test. The results show that the burr of data is reduced after filtered, and the filtered values reflect the trends of gyro north-seeking. Compared with the root mean square (RMS) of the measurements, RMS of Vondrak filter is decreased, the data is denser. Vondrak filter can effectively eliminate the random drifting containing in measurements, retain useful information in the maximum extent, and improve the accuracy of true north azimuth.

Abstract: By MAT96 and integral model in the ANSYS/LS-DYNA finite elements software, the numerical simulation research is conducted to building directional of Heibaishui hotel blasting . based on the calculation results to analy the hotel building collapsed in the process of forward, back, bloating, and made a quantitative description to the collapse process,compared to the actual project, it is found that integral model simulation results can better meet the reality, and also has guiding significance to the actual project.

Abstract: 3D laser scanning system is to use laser ranging principle to record intensively the 3D coordinates, reflectivity and texture information on the surface of the target object. It makes a real record of the three-dimensional space, which makes traditional measurement be released from the limit that couldn’t be exceeded in the past, and let the measurement precision up to a new level. At the same time, it has provided extensive researches with better help than ever. This paper mainly discusses the characteristics, working principle, application and future development of the ground 3 dimensional laser scanner.

Abstract: In the current situation, old building energy-saving rebuilding is becoming an important part of urban construction. This article summarizes the application of energy-saving technique in old building rebuilding in Germany, and particularly introduce one real project in north Germany. Chinese architects should learn some Germany successful experiments, and devote themselves to our own problem of the old building energy-saving rebuilding.

Abstract: Composition and operating modes of two different solar-assisted heat pump systems have been introduced in this paper. The advantages of compound heat pump system are analyzed compared with solo heat pump system. Solar-assisted air source heat pump system not only has the advantages, which air source heat pump system (ASHP) has, but also makes good use of renewable solar energy. It can provide cooling, heating and living hot water all the year. Solar-assisted ground source heat pump system realizes advantage complementation in various seasons between solar heat water system and ground source heat pump (GSHP) system. Solar-assisted ground source heat pump system can adjust the system operating model to solve the disadvantage of sole GSHP system, whose performance decrease for the temperature change of soil for long time operating with annual cool and heat unbalancedness. GSHP system can effectively increase the operating stability with the assistance of solar energy.