共查询到20条相似文献,搜索用时 46 毫秒
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采用捣浆-添加分散剂-螺旋分级机分选的简单流程处理风化高岭土,可得到合格精矿,并能满足陶瓷工业生产利用。 相似文献
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湖北省荆门市沙洋砖瓦厂是年生产1亿至1.1亿烧结普通砖的砖瓦厂.砖坯生产分两个车间,各年产5000~5500万块砖坯.在1990年前生产中每年约报废两根搅拌机主动轴(包括断后多次焊接至不能使用时),甚至有时新轴使用不到一个月就断裂.我们对断轴破坏情况作了研究、分析,情况如下. 相似文献
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澳大利亚 JAQUES公司生产的 RB4型圆锥破碎机,是三峡工程古树岭人工碎石加工系统的中破关键设备。该设备动锥总成(核心部件)主轴因事故,在距轴上端面315 mm处,出现一条深10~12 mm、长 530 mm(占轴颈圆周长 55.3%)的环形裂纹。因该处承受着关节轴承传递的强大轴向交变冲击力,因此必须及时修复或更换此轴,否则将造成主机的更大破坏并直接影响三峡大坝混凝土的正常浇筑。经与国外厂方联系,对方明确表示:该轴无法修复,只能更换新轴,供货周期四个半月,需人民币 28.69万元。为尽快恢复生产、节… 相似文献
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盾构施工专业化程度越来越高,在穿越不同城市的复杂地层时,土压平衡盾构螺旋输送机承受的荷载及其变化也随之越来越复杂,在富水漂卵石地层盾构隧道施工中,土仓内会堆积大量漂石,输送漂卵石会对螺旋输送机的轴芯不断磨损,从而导致断裂,土压盾构螺旋输送机轴芯断裂后修复过程十分复杂,拖延施工进度的同时施工安全质量也难以保证。以成都地铁6号线工程土建2标盾构区间为依托,采用一种快速修复断轴的接头并在实际施工中成功应用,解决传统螺旋输送机拆除更换修复技术操作难度大、施工周期长、施工风险难以控制等问题,可为类似工程提供借鉴。 相似文献
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某型剪叉式高空作业平台在发往客户的过程中发生一起制动器主轴断裂故障,通过主轴断口分析,材料化学、机械性能分析,热处理效果分析及受力分析等判断主轴断裂原因.通过分析发现,剪叉式高空平台在发运吊装过程中,制动器主轴受到冲击载荷是断裂故障的主要原因.通过规范物流公司装运货物流程,后期未发生类似故障. 相似文献
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同马山隧道斜井进正洞挑顶施工技术 总被引:1,自引:0,他引:1
通过贵广铁路客运专线同马山隧道1号斜井进正洞挑顶施工实践,详细介绍了砂质板岩隧道反挑法挑顶施工的工艺和特点,并阐述了其施工注意事项,为类似隧道挑顶施工提供指导。 相似文献
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Stuart Page 《Building Research & Information》1994,22(1):40-42
This account of good practice in conservation and repair deals with part of a property in the nation's care and will be seen as a guideline for other practitioners. Ightham Mote is a rare survival of a medieval house dating from 1340 which has been altered, expanded, repaired, renewed and adapted almost continuously to the needs of its owners for 650 years. 相似文献
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浅谈朱集西矿井风井井筒冻结工程 总被引:2,自引:1,他引:1
针对朱集西煤矿风井井筒冻结工程进行了介绍,结合该井筒水文孔设计及水位变化情况,分析了异常现象产生的原因,并提出了具体的处理办法,为今后该地区矿井施工积累了宝贵经验。 相似文献
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分析介绍深厚表土中坚井井壁随表土深度的增加而引发的新外载 ,论述仅承受水平外载到施工荷载、竖向外载等的工程力学现象及研究成果 ,提出研究深土井壁外载的一些特性及方向。 相似文献
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结合某公司丁集矿主井井架制造与安装施工实例,介绍了井架安装施工工艺,通过丁集主井井架安装方法的创新,做到井架安装与凿井掘砌施工的同时进行,从而保证了丁集占井工程项目整个目标工期的实现。 相似文献
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J. P Farrow BSc CEng MICE P. M Claye MICE R. B. Warren BSc CEng MICE MI Struct E 《Water and Environment Journal》1996,10(1):1-9
The Thames Water ring main is a 2.5 m dia. tunnel approximately 50 m below ground and 80 km long, which conveys potable water from major treatment works, located west of London, into central London. The scheme was constructed during the late 1980s and early 1990s.
In 1985, to meet increasing water demand, a gravityfed system of deep tunnels was devised by Thames Water Utilities Ltd; this involved a full ground investigation and underground obstruction survey to establish the optimum tunnel route, bearing in mind the many and various constraints.
A series of shafts was sunk to connect directly into the ring main with the purpose of either introducing water at major water-treatment works or acting as pumpout shafts at strategic locations around the capital.
The tunnels and shafts were designed to be built in two phases. Phase 1 was constructed using conventional wedgeblock techniques, but problems were encountered which resulted in increased costs and delay.
Phase 2 therefore necessitated a different approach. The company adopted a completely new strategy by changing the form of contract, purchasing its own tunnel boring machines, and redesigning the tunnel linings.
One of the keys to the success of the ring main was the new expanded wedgeblock concrete lining. Design calculations were prepared and finite element analysis work was carried out. The new rings were subjected to build and load tests, both on individual segments and complete rings, using specially designed test rigs. 相似文献
In 1985, to meet increasing water demand, a gravityfed system of deep tunnels was devised by Thames Water Utilities Ltd; this involved a full ground investigation and underground obstruction survey to establish the optimum tunnel route, bearing in mind the many and various constraints.
A series of shafts was sunk to connect directly into the ring main with the purpose of either introducing water at major water-treatment works or acting as pumpout shafts at strategic locations around the capital.
The tunnels and shafts were designed to be built in two phases. Phase 1 was constructed using conventional wedgeblock techniques, but problems were encountered which resulted in increased costs and delay.
Phase 2 therefore necessitated a different approach. The company adopted a completely new strategy by changing the form of contract, purchasing its own tunnel boring machines, and redesigning the tunnel linings.
One of the keys to the success of the ring main was the new expanded wedgeblock concrete lining. Design calculations were prepared and finite element analysis work was carried out. The new rings were subjected to build and load tests, both on individual segments and complete rings, using specially designed test rigs. 相似文献
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以太原市恒地大厦工程为例,介绍了电梯井井壁多层板定型内模施工技术,针对该工程施工难点,分别阐述了施工方案及施工要点,并提出了相应的质量控制措施和安全环保措施及成品保护办法等,指出该技术具有良好的社会、经济效益。 相似文献
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通过介绍太原西山隧道1号竖井采空区的处治及施工方法,阐述了隧道采空区处理的原则,处治标准,材料及质量要求,指出应根据采空区和隧道的相对关系采取可靠有效的处治措施,以保证结构的长期稳定安全。 相似文献