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钻孔机械旋转刀扩底灌注桩的开发与应用
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作者 王玉 《地质与勘探》 CAS CSCD 北大核心 1996年第4期57-58,共2页
钻孔机械旋转刀扩底灌注桩的开发与应用王玉(沈阳铁路局锦州勘测设计院·锦州·121000)在土建设计中,往往遇到房屋上部荷载较大,而地表层是较厚的软弱土,采用浅基础难以满足地基不变形的要求。为解决这一问题,一般... 钻孔机械旋转刀扩底灌注桩的开发与应用王玉(沈阳铁路局锦州勘测设计院·锦州·121000)在土建设计中,往往遇到房屋上部荷载较大,而地表层是较厚的软弱土,采用浅基础难以满足地基不变形的要求。为解决这一问题,一般都采用桩基础。目前,常采用的桩基础有:预制... 展开更多
关键词 扩底灌注桩 钻孔 机械旋转刀
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Novel method for detection of anomalous structure characteristics of ID precision ultrathin monocrystalline silicon section cutting tool
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作者 陈宗农 郭明 +1 位作者 王庆九 余学功 《Journal of Zhejiang University Science》 CSCD 2002年第3期263-267,共5页
The structure characteristics of ID precision ultrathin monocrystalline silicon section cutting machine tool spindle with force monitoring bearings functioning as force measuring sensors were detected with the new H... The structure characteristics of ID precision ultrathin monocrystalline silicon section cutting machine tool spindle with force monitoring bearings functioning as force measuring sensors were detected with the new Hilbert theory based signal wave envelope detection method, presented to replace the conventional hardware device in order to ensure that the signal is measured online with high fidelity. According to the probability of anomalous incidents in the cutting process, a mathematical recognition model has been designed and verified on an STC 22ID machine. 展开更多
关键词 Machine tool spindle BEARING Monocrystalline silicon section Signal analysis
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