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It is generally recognized that the low strength and high compressibility are the characteristics of soft soil. In addition to other techniques, reinforcement can also be used in increasing the strength and decreasing the deformation of this kind of soil. The results of an investigation into the effects of a natural fiber on the consolidation and shear strength behavior of Shanghai clayey soil reinforced...
This paper introduces a flammable gas detection system based on wireless sensor network which adopts chip design of JN5139 and ZigBee. In this system, gas monitoring nodes can self-organize into wireless sensor network, monitor the gas leak status timely and upload to the monitoring center. Flammable gas concentration of each node can be displayed in real time. Once gas concentration is higher than...
AC filters are important harmonics filtering equipment in HVDC transmission. The high voltage capacitor failure in AC filters is incidental. Some elements failure cannot be detected by the traditional protection due to the small fault current. The capacitor unbalance protection is designed for this situation to protect the high voltage capacitor units in the H-bridge against avalanche effects and...
Grounding characteristics of linear, star-type and toroidal electrodes are discussed in this paper. Based on the analysis of the performance of double-ring in uniform and horizontal two-layer soils, an electrode model of standard triple concentric rings buried with different depth is presented for plusmn800 kV Xiluodu and Xiangjiaba converter stations in the first period of Jinsha River DC projects...
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