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广汕高铁增江特大桥成功合龙，即将进入全线铺轨阶段_建设_广州_我的网站
一 | New Delhi, Oct 16 (UNI) Defence Minister Rajnath Singh will host the Defence Ministers of African Nations during the India-Africa Defence Dialogue (IADD) on October 18 on the sidelines of the 12th DefExpo in Gandhinagar, Gujarat.
The broad theme of the dialogue is ‘India-Africa: Adopting Strategy for Synergising and Strengthening Defence and Security Cooperation’.
India and Africa share close and historical ties. India’s approach towards Africa is guided by the Kampala Principles enunciated by Prime Minister Narendra Modi in 2018, the Defence Ministry said.
India’s engagement rests on African priorities as outlined by Africans themselves.
The first-ever India-Africa Defence Ministers Conclave was held in Lucknow, Uttar Pradesh in conjunction with DefExpo on February 6, 2020.
A Joint Declaration - ‘Lucknow Declaration’ - was adopted at the end of the conclave as an outcome document.
In continuance of the ‘Lucknow Declaration’ and in consultation with stakeholders, IAAD has been institutionalised to be held once every two years on the sidelines of DefExpo.
The IADD will explore new areas of convergence for mutual engagement, including in areas like capacity building, training, cyber security, maritime security and counter terrorism, the Defence Ministry said.
Manohar Parrikar Institute for Defence Studies and Analyses (MP-IDSA) is the knowledge partner for the India-Africa Defence Dialogue.
UNI ASU PRT。
二 | 广汕高铁增江特大桥成功合龙，即将进入全线铺轨阶段。王建国摄由广铁集团广州工程建设指挥部建设管理、中国铁路广州工程局承建的增江特大桥为双塔双索面混凝土斜拉桥，为广汕高铁关键控制性工程。
三 | 大桥位于广州市增城区石滩镇境内，全长2569.480米，桥梁主跨 260米跨越增江水道，主塔采用高100米H型桥塔。主桥在全世界高速铁路斜拉桥建设中首次采用混凝土梁节段预制胶拼法施工，利用混凝土梁体自重大的特点，克服一般斜拉桥受空气流动性影响产生涡振现象，同时采用大型剪力键，提高梁体拼接缝的抗剪力性能。节段梁拼装通过纵向粗预应力钢棒与粘结胶有效结合，将各节段梁串联成整体而成桥，加大了梁体的刚性，降低了斜拉桥柔性变化特点，提高了高速铁路行车舒适性和安全性。这一创新性技术应用成为国内高速铁路建设的新标杆。广汕高铁增江特大桥成功合龙，即将进入全线铺轨阶段。王建国摄据广州工程建设指挥部有关负责人介绍，“主桥施工工序繁多，工艺复杂，精度控制要求高，成桥线形不易控制，施工难度高，安全风险大，是一座科技攻关型桥梁。铁路部门于2019年12月专门成立了‘广汕高铁大跨度节段预制拼装混凝土斜拉桥关键技术及智能化研究’重点课题攻关小组，并如期攻克了相关难题。
四 | ”据悉，主桥节段梁对气温、混凝土质量和浇筑工艺均有严格要求，为确保顺利合龙，广州工程建设指挥部多次组织参建单位开展专题研究，制定增江特大桥合龙施工方案，对施工工艺进行详细分析和优化完善，并选定有利气温时段，最终实现了混凝土一次浇筑成功。
五 | 广汕高铁联通京广、京港高铁和沿海铁路，是广东省“五纵二横”高速铁路网重要组成部分。广汕高铁建成通车后，广州到汕尾的旅行时间将由目前的2小时压缩到最快40分钟左右。沿线旅客出行将更加方便通畅、舒适便捷，对完善粤港澳大湾区综合交通体系建设，打造广州“1小时经济生活圈”，助推粤东地区加快融入粤港澳大湾区协同发展、促进乡村振兴具有重要意义。
六 | 采写：南都记者钟丽婷 实习生李露莉 通讯员林群海 柴晶玲返回搜狐，查看更多责任编辑：
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