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Artit Udomchai Suksun Horpibulsuk Cherdsak Suksiripattanapong Narongsak Mavong Runglawan Rachan Arul Arulrajah 《Geotextiles and Geomembranes》2017,45(4):350-360
In this research, a Bearing Reinforcement Earth (BRE) wall with a residual clay stone backfill was successfully implemented as an alternative truck ramp support for an on-site crusher plant in the Mae Moh mine, Thailand. The performance of the BRE wall during and after the end of construction as well as during the service state was evaluated in terms of, settlement, bearing stress, lateral movement, lateral earth pressure and tension force in the reinforcements. Bearing reinforcement is a cost-effective inextensible earth reinforcement, which is composed of a longitudinal member and transverse members. The maximum settlement at the end of construction (20 days) was about 5 mm. The installation of the truck ramp (10 days after the end of construction) resulted in an immediate settlement of about 2 mm. The final settlement due to the backfill, truck ramp and truck load after 270 days was found to be uniform due to the contribution of bearing reinforcement and was approximately 25 mm. The bearing stress which was uniformly distributed was found to increase rapidly with construction time, which was in agreement with the relatively uniform settlements. The lateral wall movement at the front and lateral sides at the end of construction was very small with the maximum movement (at the top of the wall) found to be less than 10 mm. As such, the ratio of lateral movement to height (δ/H) was found to be approximately 0.12%, which was lower than the allowable value of 0.4%. With this low δ/H and the insignificant change in the measured settlement and lateral movement during service, the BRE wall was considered to have a very high stability. The coefficients of lateral earth pressure, K and depth relationship were proposed based on the analysis of measured maximum tensile force in the reinforcements. The maximum tension plane of the BRE wall could be represented by the coherent gravity hypothesis. Using the proposed K and maximum tension plane, the internal stability of the BRE wall was furthermore examined. A proposed method of designing the BRE wall with claystone backfill was also proposed. 相似文献
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惯性圆锥破碎机运动学和动力学分析 总被引:3,自引:1,他引:3
惯性圆锥破碎机是具有独特原理和结构的高效超细粉碎设备。本文通过对惯性圆锥破碎机破碎机理的研究,对该破碎机的运动学和动力学作了较全面的分析,建立了惯性圆锥破碎机的运动学模型,推导出惯性圆锥破碎机的运动学和动力学公式,得出破碎力计算公式,并运用运动学和动力学分析了惯性圆锥破碎机的工作特点。 相似文献
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针对目前秸秆粉碎装置存在缠轴铰刀、出料过长、无法有效处理湿度较大的稻秆等问题,论文提出了一种适于田间作业的新型斩切式稻杆粉碎机。通过Solidworks进行整体建模,基于TRIZ理论对曲轴同步输送斩切装置进行创新设计,并对圆弧形齿轮啮合调隙机构、二次粉碎装置进行了设计,对斩刀滑切角度参数进行计算,利用COMSOL软件对曲轴连杆强度进行有限元分析。制作了实物样机并进行粉碎试验,样机尺寸1.62 m×0.75 m×1.2 m、重量250 kg、试验结果表明生产效率达3.64 m^3/h、出料长度5 mm^10 mm、粉碎合格率90%左右,可大大提高稻杆利用价值,具有广阔的市场前景。 相似文献
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利用诊断技术,对圆锥型破碎机状态,进行定点、定时、监测管理,可早期发现设备潜伏故障,提高时故障的预测水平,及时制定维修决策,延长设备使用寿命。 相似文献
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唐威 《有色金属(选矿部分)》2011,(Z1)
简述了惯性圆锥破碎机的结构和特点,并通过惯性圆锥破碎机应用实例表明该机能有效降低入磨粒度,优化选厂破碎工艺流程,很好地满足"多碎少磨"新工艺的要求。 相似文献
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反击式破碎机是纸浆厂碱回收苛化工序的主要设备,在生产过程中设备存在堵料、破碎颗粒不够细等问题.实验表明,通过对破碎机的打击角、壳体间隙、反击高破碎粒度,延长反击锤的使用寿命并降低成本,满足生产需要. 相似文献
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机制砂生产现状与发展 总被引:5,自引:0,他引:5
介绍了国内外砂石市场状况和国内砂石业面临的产品质量低、生产成本高等问题。我国亟须引进、消化国外先进技术 ,研究开发适合我国国情的先进生产工艺和高效破碎新设备 ,改造原有生产线 ;提高产品质量 ,尽可能就地取材 ,扩大机制砂生产规模 ,加速我国机制砂产业的发展 ,满足大规模建设的需求。 相似文献