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矩形钢管混凝土柱施工技术在建发现代城工程中的应用 被引量:2
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作者 安玉华 《宁夏工程技术》 CAS 2010年第4期365-368,共4页
矩形钢管混凝土柱作为钢-混凝土组合结构之一,在高层和超高层建筑中得到了日益广泛的应用.以银川市建发现代城工程为例,详细介绍了矩形钢管混凝土柱的施工方法,具体包括柱与梁板的接点形式,钢管柱的安装、焊接,混凝土泌水、空鼓问题的... 矩形钢管混凝土柱作为钢-混凝土组合结构之一,在高层和超高层建筑中得到了日益广泛的应用.以银川市建发现代城工程为例,详细介绍了矩形钢管混凝土柱的施工方法,具体包括柱与梁板的接点形式,钢管柱的安装、焊接,混凝土泌水、空鼓问题的控制方法.钢管柱在建发现代城工程中的应用增大了使用面积,为今后类似工程的施工提供参考与借鉴. 展开更多
关键词 钢管混凝土柱 垂直度控制 焊接变形 混凝土浇灌 泌水控制
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矩形钢管混凝土施工技术在银川建发现代城工程中的应用 被引量:2
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作者 孔令键 《铁道建筑》 北大核心 2009年第10期117-119,共3页
结合工程实际介绍矩形钢管混凝土柱的施工方法,其中包括柱与梁板的节点形式,钢管柱的安装、焊接及钢管混凝土泌水、空鼓问题的控制方法。
关键词 钢管混凝土柱 垂直度控制 焊接变形 混凝土浇筑 泌水控制
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(2×72)m预应力混凝土连续曲线梁施工技术难题以及其解决措施 被引量:1
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作者 王磊 《甘肃科技纵横》 2019年第4期38-40,共3页
选取某铁路(2×72)m连续曲线箱梁桥实际施工案例作为背景,针对其作业过程中所遇到的悬臂施工线形控制和大体积连续梁砼施工技术现实遇到的困难和解决措施,通过实际验证效果,得到以下结论:在严格遵循悬臂施工线形控制方法的前提下,... 选取某铁路(2×72)m连续曲线箱梁桥实际施工案例作为背景,针对其作业过程中所遇到的悬臂施工线形控制和大体积连续梁砼施工技术现实遇到的困难和解决措施,通过实际验证效果,得到以下结论:在严格遵循悬臂施工线形控制方法的前提下,在施工测量控制网的建立、测点布置、挠度观测、箱梁轴线控制、箱梁高程控制五个方面认真按照所述规定指导箱梁悬臂施工,最终施工后线形高程和设计高程之间的偏差会极大地减小,符合规范要求;掺入粉煤灰能够减少混凝土放热,添加缓凝剂能够延迟混凝土凝结,起到减少裂缝的效果;减小混凝土的水灰比,尽可能降低自由水含量,是一种处理泌水现象的有效措施。在混凝土拌和物中掺加增稠剂以改善混凝土粘度,也可以大大改善混凝土的泌水情况。在配合比设计阶段,拟通过上述方法处理混凝土泌水难题;通过减小砂用量、改用合适的碎石和聚羧酸系添加剂,可有效减少混凝土的收缩。 展开更多
关键词 连续曲线梁 线性控制 温升控制 泌水控制 收缩控制
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Effect of Sugar Beet Top Ensiled with Sugar Cane Bagass in Diet of Lactating Buffaloes
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作者 Ishagh Kord-Nejad Hassan Fazaeli +1 位作者 Kayvan Karkoodi Ahmad Khayyat 《Journal of Agricultural Science and Technology(A)》 2012年第2期278-283,共6页
Sugar beet tops including leaves and crown harvested and chopped into 3-6 cm, mixed with sugar cane pulp and sugar cane molasses (about 5% of the total mass) to provide a mixture contained 30-35 percent dry mater. A... Sugar beet tops including leaves and crown harvested and chopped into 3-6 cm, mixed with sugar cane pulp and sugar cane molasses (about 5% of the total mass) to provide a mixture contained 30-35 percent dry mater. After two months of ensiling, the silage was evaluated and used in the ration of lactating buffaloes. A Latin square experiment in a changeover design, with three periods of time, each with 20 days for adaptation and 10 days for recording data, was conducted in which 15 multiparous lactating buffloes were used in three similar groups, each with five animals. The prepared silage was included in the diet of lactating buffaloes where a control diet (A) was compared with treatment diets contained 25% (B) and 50% (C) silage (DM basis) respectively. Milk yield was recorded, sampled and analysed for fat, protein, solid not-fat and total solids-content. The maximum daily rough milk yield per animal was obtained on diet C while minimum on diet A (P 〈 0.05). Similar trends were observed for 4% fat corrected milk, and 3.5% fat corrected milk that were significantly different between the treatments (P 〈 0.05). The percentage of crude fat and daily fat yield per animal were significantly (P 〈 0.05) higher in treatment C comparing to A and B. An increasingly trend of milk and fat yield was observed when the animals received silage contained diets but statistically it was significant only for the diets contained 50% silage. In addition, the fat percentage was significantly (P 〈 0.05) increased when the buffaloes received diet containing 50% silage. The highest (P 〈 0.05) amount of protein and total solid yield obtained, when the animals received high (50%) silage diet. 展开更多
关键词 Sugar beet top SILAGE milking buffaloes.
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