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基于温度配切法的不对称双悬臂主梁中跨合龙施工技术研究
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作者 衡亮 《中文科技期刊数据库(全文版)工程技术》 2023年第5期102-105,共4页
中山开平高速银洲湖特大桥双塔双索面混合式结合梁斜拉桥工程采用半浮动式系统,跨径组合为 56.8+131.2+530+131.2+56.8米,边中跨比约为 0.355,全长906米。主跨采用边跨浇筑吊篮悬臂,桥面吊机吊装施工,采用不对称的双悬臂施工。以银洲湖... 中山开平高速银洲湖特大桥双塔双索面混合式结合梁斜拉桥工程采用半浮动式系统,跨径组合为 56.8+131.2+530+131.2+56.8米,边中跨比约为 0.355,全长906米。主跨采用边跨浇筑吊篮悬臂,桥面吊机吊装施工,采用不对称的双悬臂施工。以银洲湖特大桥为研究对象,重点介绍了以温度、日照对中跨主梁合龙口影响规律为研究对象的不对称双悬臂主梁中跨合龙施工技术,以供今后此类工程参考。 展开更多
关键词 斜拉桥 双悬臂 温度配切法 不对称施工
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飞云江跨海特大桥中跨合龙关键技术 被引量:5
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作者 张亚海 南飞 《施工技术》 CAS 2020年第2期66-69,共4页
飞云江跨海大桥为主跨380m的叠合梁斜拉桥。综合考虑多种因素,中跨采取温度配切法合龙,并创新采用耳座板和炮弹销形式进行锁定技术,在合龙段两侧MB15梁段和合龙段MHB上焊接耳座板,通过连接板和炮弹销进行销接,缩短锁定时间。在钢梁温度... 飞云江跨海大桥为主跨380m的叠合梁斜拉桥。综合考虑多种因素,中跨采取温度配切法合龙,并创新采用耳座板和炮弹销形式进行锁定技术,在合龙段两侧MB15梁段和合龙段MHB上焊接耳座板,通过连接板和炮弹销进行销接,缩短锁定时间。在钢梁温度上升前首先完成一边临时约束的解除,在完成主梁腹板焊接后拆除锁定装置,完成合龙。为提高合龙精度,减小累积误差,中跨合龙前提前1个梁段观测合龙口宽度随温度变化情况,确定合龙段预留焊缝宽度后计算合龙段下料长度;同时,合龙前采取预防措施确保合龙精度。实践表明,采用该方法进行合龙可缩短锁定时间,减少温度影响,提高施工工效和合龙精度。 展开更多
关键词 桥梁工程 斜拉桥 叠合梁 温度配切法 合龙 施工技术
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曲塔曲梁无背索斜拉桥合龙控制技术研究 被引量:1
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作者 王建平 《青海交通科技》 2020年第5期92-100,共9页
以东江梨川大桥曲塔曲梁无背索斜拉桥为工程背景,分析了配切法、顶推法及配切-顶推综合法三种合龙方法的特点,结合该桥结构特点和施工现场气温及其他自然条件,选择了配切法合龙方案。采用实桥测试与有限元模拟的方法,计算分析了关键施... 以东江梨川大桥曲塔曲梁无背索斜拉桥为工程背景,分析了配切法、顶推法及配切-顶推综合法三种合龙方法的特点,结合该桥结构特点和施工现场气温及其他自然条件,选择了配切法合龙方案。采用实桥测试与有限元模拟的方法,计算分析了关键施工参数,并详细介绍了合龙施工步骤、合龙口两侧梁端标高的控制、合龙时间及合龙段配切长度的确定、合龙段的横向匹配、临时锁定装置的设置、梯形配切法等关键合龙技术和实际施工情况。实践证明,该桥采用配切合龙法合龙顺利,具有施工快捷,匹配精确的优点。 展开更多
关键词 无背索斜拉桥 配切法 合龙
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Surgical anatomy of the innervation of pylorus in human and Suncus murinus, in relation to surgical technique for pylorus-preserving pancreaticoduodenectomy 被引量:1
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作者 Shuang-Qin Yi Fei Ru +8 位作者 Tetsuo Ohta Hayato Terayama Munekazu Naito Shogo Hayashi Sichen Buhe Nozomi Yi Takayoshi Miyaki Shigenori Tanaka Masahiro Itoh 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第14期2209-2216,共8页
AIM: To clarify the innervation of the antro-pyloric region in humans from a clinico-anatomical perspective. METHODS: The stomach, duodenum and surrounding structures were dissected in 10 cadavers, and immersed in a... AIM: To clarify the innervation of the antro-pyloric region in humans from a clinico-anatomical perspective. METHODS: The stomach, duodenum and surrounding structures were dissected in 10 cadavers, and immersed in a 10mg/L solution of alizarin red S in ethanol to stain the peripheral nerves. The distribution details were studied to confirm innervations in the above areas using a binocular microscope. Similarly, innervations in 10 Suncus murinus were examined using the method of whole-mount imm unohistochemistry. RESULTS: The innervation of the pyloric region in humans involved three routes: One arose from the anterior hepatic plexus via the route of the suprapyloric/supraduodenal branch of the right gastric artery; the second arose from the anterior and posterior gastric divisions, and the third originated from the posterior-lower region of the pyloric region, which passed via the infrapyloric artery or retroduodenal branches and was related to the gastroduodenal artery and right gastroepiploic artery. For Suncus murinus, results similar to those in humans were observed. CONCLUSION: There are three routes of innervation of the pyloric region in humans, wherein the route of the right gastric artery is most important for preserving pyloric region innervation. Function will be preserved by more than 80% by preserving the artery in pylorus-preserving pancreaticoduodenectomy (PPPD). However, the route of the infrapyloric artery should not be disregarded. This route is related to several arteries (the right gastroepiploic and gastroduodenal arteries), and the preserving of these arteries is advantageous for preserving pyloric innervation in PPPD. Concurrently, the nerves of Latarjet also play an important role in maintaining innervation of the antro-pyloric region in PPPD. This is why pyloric function is not damaged in some patients when the right gastric artery is dissected or damaged in PPPD. 展开更多
关键词 INNERVATION Quality of life Pylorus-preserving pancreaticoduodenectomy Suncus murinus Whole mount immunohistochemistry
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Explore the Coordination and Nursing of the LaparoscopicCholecystectomy
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作者 ZhouYanXia 《International English Education Research》 2014年第2期135-137,共3页
Objective: Explore laparoscopic cholecystectomy ordination and nursing methods. Methods: A retrospective analysis of our hospital from July 2009 to January 2011 Laparoscopic cholecystectomy in 89 cases of nursing da... Objective: Explore laparoscopic cholecystectomy ordination and nursing methods. Methods: A retrospective analysis of our hospital from July 2009 to January 2011 Laparoscopic cholecystectomy in 89 cases of nursing data. Results: This group of patients the operation is successful, no serious complications occurred. Through surgery and nursing, has obtained the desired effect .Conclusions: The accuracy of the nursing co-ordination is to ensure the success of laparoscopic cholecystectomy. The most important thing is, with laparoscopic cholecystectomy and intraoperative nursing can improve the quality of life of patients. 展开更多
关键词 Laparoscopic cholecystectomy NURSING ORDINATION
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地球内部扁率及其它物理参数的计算 被引量:2
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作者 郭俊义 黄金水 张飞鹏 《武汉测绘科技大学学报》 CSCD 1996年第2期109-114,共6页
计算了地球内部任意半径处与密度分布相关的物理参数,如扁率、质量、重力、压强、平均主惯量、主惯量之差等,对应于初步参考地球模型(PREM)多项式及离散数字形式的密度模型给出了上述参数的多项式及离散数字模型。
关键词 地球内部的物理参数 常微分方程 贝谢夫
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地球内核的径向振动 被引量:1
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作者 郭俊义 《武汉测绘科技大学学报》 CSCD 1997年第2期111-113,共3页
研究了地球内核围绕其平衡位置的径向振动,即所谓Slichter模,求出了这一现象的周期。在求解导出的常微分方程组时采用了切贝谢夫配点法,容易而成功地解决了方程在地心处的奇异性带来的困难。
关键词 地核 地球内核 径向振动 比雪夫
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