桃园隧道位于站前施工三标，该标段由中国建筑股份有限公司承建。隧道全长940米，V级围岩占比高 达88.3%，最大埋深37.33米，最小埋深仅4.73米，下穿110KV高压电塔及2条地方道路，距离最近的风力 发电机仅50米，周边环境复杂、对施工振动控制要求高，如同在"水豆腐里打洞"，施工技术难度大、安 全环保要求高。 11月9日，随着最后一声"隆隆"的巨响，由山东铁投集团投资建设、中国建筑股份有限公司等单位参建 的潍宿高铁至青岛连接线重点控制性工程——桃园隧道顺利实现贯通，标志着项目建设取得重大阶段性 突破，为后续箱梁顺利架设奠定坚实基础。 潍宿高铁至青岛连接线位于山东半岛南部，全长108.78公里，设计时速350公里。作为国家"八纵八 横"高铁网中京沪高铁（601816）辅助通道与沿海通道的重要连接工程，亦是鲁中高铁通道的关键组成 部分，项目建成后将显著提升胶东半岛与京津冀、长三角地区的互联互通水平，为区域经济社会高质量 发展注入强劲动力。 面对复杂地质挑战，山东铁投集团济青高铁公司各专业部门、青岛指挥部联合参建单位中建股份青岛连 接线项目部科学策划，组织召开3次专家论证会，听取业内专家的指导、建议，优化施工 ...

Core Points - The construction of the Weishui High-speed Railway to Qingdao connection line has reached a significant milestone with the installation of the first box girder on August 22, marking the completion of girder erection across the entire line [1] - The project includes four beam production yards responsible for the prefabrication and erection of 867 single-line box girders and 1621 double-line box girders [4] - The entire project is expected to be operational by the end of June 2028, significantly enhancing passenger travel and economic exchanges between the Jiaodong Peninsula and the Yangtze River Delta [13] Construction Details - The first box girder measures 32.6 meters in length and weighs 760 tons, with strict adherence to quality control measures during its production and installation [7] - The construction teams have implemented a 24-hour continuous operation schedule to overcome challenges such as safety risks near operational lines and limited working hours [9] - Advanced technologies, including IoT and AI, have been utilized to ensure the quality and efficiency of the box girder production process, with each girder assigned a unique identification number for digital tracking [7][10] Safety Measures - To ensure the safety of the girder erection process, comprehensive feasibility studies and three-dimensional modeling have been conducted to optimize the lifting and transportation of girders [10] - Additional safety features, such as a monitoring system for the bridge erection machine and collision detection radar, have been integrated to enhance operational safety [10]

Core Points - The successful restoration of power supply for four 110kV lines, including the 110kV Zhuangtang Line, marks a significant milestone in the construction of the Weishui High-speed Railway to Qingdao connection line [1][3] - The completion of the power line relocation facilitates the construction of continuous beams and other related works, accelerating the overall project timeline [1][5] Group 1 - The 110kV Zhuangtang Line, Zhuangjiang Line, Zhuangjiao Line, and Zhuangwang Line required simultaneous power outages for relocation, presenting significant coordination challenges [3] - The project team, including China Railway 10th Bureau, optimized construction plans and efficiently completed the tasks within 7 days, including the erection of 10 new towers and the installation of 32,800 meters of wire [3] - The 220kV Langkai Line and Island Lang II Line, as critical backbone lines, were also relocated to facilitate bridge construction, completing tasks in 10 days [5] Group 2 - The Weishui High-speed Railway to Qingdao connection line spans 108.78 kilometers with a design speed of 350 km/h, featuring four stations [5] - This connection line is part of the national "Eight Vertical and Eight Horizontal" high-speed rail network, enhancing the rapid transit capabilities between Qingdao and other regions [5]