Advanced Materials Research Vols. 518-523

Abstract: By outdoor stimulation experiments of slope runoff scouring, the on-way distribution regulation of slope runoff shear stress and its influencing factors were studied. In the experiments, different conditions were stimulated, including three levels of grass coverage (bare slope: 0%, low level: 30%-40%, high level: 70%-80%), slopes of four gradients(15°, 20°, 25°, 30°), and three levels of discharge(3L/min, 5L/min, 8L/min). The results showed that the slope runoff shear stress was directly proportional to scouring discharge, but inversely proportional to grass coverage, it was also greatly influenced by the plot gradients, but the relationship was complicated. The value of slope runoff shear stress fluctuated on different on-way sections, besides, the fluctuation range and the initial fluctuation section both differed as conditions changed, including grass coverage, discharge and gradients. Provided high level of discharge and low coverage, the fluctuation range would be large and had a high frequency.

Abstract: According to the tracing monitoring results of surface settlement and deformation of method of PBA in large-span tunnel used in the construction of the of Shenyang subway station, the analysis shows the ground surface settlement characteristics and laws influenced by the process of tunnel excavation influence. The result shows that the influence to formation of soil disturbance is large, the step sequences influence the deformation of the surface subsidence obvious are the small pilot drift excavation and the buckle arch of the first lining, accounting for about 70% of the final settlement, while the other is smaller, therefore the key of the project is to control the ground surface settlement of the small pilot drift excavation and the buckle arch of the first lining. Analysis also shows that, the effect of grouting consolidation in the upper strata in the arch crown and surrounding rock foundation of buildings before the construction to reduce the surface subsidence and building deformation is obvious.

Abstract: Arch dam abutment stability analysis of arch dam design, construction, is the primary problem of operation. From home, outside the related data that appear most, arch dam accident due to abutment instability caused by. On the engineering geological condition is suitable, the arch dam is safe and reliable, economic and reasonable and the broad masses of the people welcomed the dam type. But it must be based on abutment stability based on. Therefore in the arch dam design, there is a need for dam abutment rock mass are detailed and thorough exploration and stability analysis of. This paper adopts the rigid body limit equilibrium method based on arch dam on the left bank of the slide stability analysis and dam abutment stability analysis of arch dam plane, gives the dam safety stability evaluation. A cover of hyperbolic arch dam, the dam height is 163.00m, is a type of buildings. The engineering geological conditions in the dam area is more complex, the existence of multiple faults, joints, fissures, karst cave is developed. Study of a dam on the left abutment stability, reliability and stability of project evaluation is a very important technical and economic significance.

Abstract: Air can be dehumidified with the porous hydrophobic wall in mostly underground tunnel in constant zone of subsurface temperature. For water vapor through the wall, it must produce a concentration difference between both sides of the wall. According to this principle, a test is done combined with repair works on an underground tunnel. The hydrophobic porous mortar is scraped on geotextile, which is pasted on the painted original tunnel wall as hydraulic conductivity layer where vapor condense and water flow away. It is recognized that temperature and mass transfer rate is relative to tunnel air velocity, air temperature and partial pressure of water vapor, the temperature in constant zone of subsurface temperature and the saturated water vapor partial pressure. Comparative test results show that the condensation dew on the wall is disappeared completely, the wall dehumidifies air effectively, and saving dehumidifier power is more than 50% in normal humidity range.

Abstract: This text analyzes the defects in design and use of the traditional heated bed and its applied current situation, combining wih the investigation on the spot to the project on the energy-conserving reform of the rural house in the Hei He city, and giving out the energy-conserving reform technology strategy for the traditional heated bed in the northeastern, and emphasizing the important role and practical significance of the complex derivatives of the traditional houses’ ecological components in the modernized transformation of the traditional houses

Abstract: viscoelasto-plastic; double yield surface; equivalent sand wall; finite element; Abstract. Based on double yield elastoplastic model, one viscoelasto-plastic model is dealt with in detail. The method of transferring to equivalent sand wall is introduced when soft soil is treated by plastic drainage plate. The viscoelasto-plastic model and modified Cam-Clay model are applied into the finite element calculation of soft foundation treatment of a tailing dam. By comparison, it can be got that the displacement calculated by the viscoelasto-plastic model is closer to monitoring data than that calculated by modified Cam-Clay model. It demonstrates the reasonableness and efficiency of the viscoelasto-plastic model．

Abstract: Emergence in large numbers as well as high concentration in local areas of high-rise buildings in Baotou City has damaged ecological environment of the city. Through analyzing current situation of development for high-rise buildings in Baotou, the paper aims to research their influence on environment from the perspective of ecology, and thus puts forward ecological strategy of high-rise buildings urban environment in Baotou.

Abstract: The enormous consumption of resources and energy of construction industry results in severe environmental pollution. From both the views of energy consumption and environmental footprint, this article analyzed theoretically the energy consumption and environmental benefits on life cycle of wood-frame building, in order to determine the general impact on environment by appropriate building materials, so that some ideas for development of wood-frame architecture can be concluded.

Abstract: In Chinese history, pitched roof acted as cultural carrier and hierarchy symbols; it is still accepted as image of home today and widely used by architects. From three important aspects as connotation, function and aesthetics, this paper shows the value of pitched roof in modern architecture under Chinese background, and provides some recent experiments on inheriting of conventional pitched roof.

Abstract: It is of great importance to study the impact of the cooking generated contaminants on the indoor air quality in the kitchen since cooking is regarded as the main source of indoor contaminants. This study aims investigate and analysis the indoor air quality of kitchen with using CFD numerical analysis method via the velocity, temperature, humidity CO2 concentration .It is concluded that The temperature distribution are large difference in the kitchen and the maximum value is up to 324K on the work area which near the cooking ,and the CO2 concentration which is close to the stove is 1420ppm,1370ppm, 1470ppm respectively, and it is more than the acceptance criteria (CO2<1000ppm) 42%,37% and 47% respectively. It is serious impact on the staff's physical health.