Advanced Materials Research Vol. 743

Abstract: Micro-piles are widely used because of its own advantages, but relatively few theoretical studies about its anti-slide mechanism. Firstly, the mechanical properties of the model pile into calibration tests, to get of elastoplastic session elastic modulus, were 0.69×10⁴MPa and 0.04×10⁴MPa.Through the different pile spacing under a single row of miniature pile reinforcement debris landslide indoor model experiment to study the micro-piles against sliding mechanism. The test results show that: different pile spacing, single row of micro-pile soil pressure mainly concentrated in the range of slip surface more than 1/3 of the pile. The smaller pile spacing, soil arching effect, the greater the micro pile skid failure critical moment, the micro pile can withstand landslide thrust the greater skid the better.

Abstract: Buried pipe crossing faults is an important part of underground city lifeline, which is influenced by many factors. It is necessary to calculate Soil-Pipe-Fluid interaction that includes fluid-structure interaction (FSI) and pipe-soil interaction. Under multi-action of site, fault movement, and earthquake, finite element model of buried liquid-conveying pipe is established by ADINA. Two-way fluid-structure coupling methods for fluid-structure interaction and definition of contact for pipe-soil interaction are introduced. Pipe-soil friction is defined in solid model; especially, flow assumption and fluid structure interface condition are defined in fluid model. Damage of buried liquid-conveying pipe under soil-pipe-fluid action is calculated under fluid-structure coupling with pipe-soil interaction. Influences of site soil and liquid velocity on effective stress and circumferential strain of buried liquid-conveying pipe are analyzed, and some advice is proposed for pipe protection.

Abstract: The BSM has been used in slope stability analysis, this paper gives a more reasonable model and develops a program by VC++ to study the slope stability of groundwater. A reasonable result is obtained with the proposed model.

Abstract: Electrochemical sensors based on tubular yttria-stabilized zerconia (YSZ) with the spinel-type oxide as a sensing-electrode (SE), which is prepared by sol-gel method, were fabricated and examined for NO₂ detection in the temperature range 450~500°C. The results show that ZnFe₂O₄, shows extreme sensitivity to NO₂. The EMF varies linearly as a function of the concentration of NO₂ (0 ~ 463 ppm) at 500 °C.

Abstract: The resources crisis mines is a necessary stage of mining enterprise development, the mine materials with exploring for future development direction of resources crisis on mines concerning the rise and fall of the country, The scientific analysis and beneficial exploration for future development direction of the resources crisis mines, which can provide reference for the future development of resources crisis mines.