据介绍，华山松隧道地处云南省会泽县境内，全长16.4公里，属于一级高风险隧道。该隧道地质条件极 为复杂，穿越23条断层以及岩溶发育地段，围岩破碎，一旦遇水便极易软化膨胀发生溜塌、塌方等险 情，给施工带来极大挑战。"我们采取'环形开挖、预留核心土、分台阶支护'相融合的方案，结合隧道 特点进行施工，成功克服围岩失稳变形的建设难题。"中铁十二局渝昆高铁技术负责人马国栋说。 记者从京昆高铁西昆公司获悉，1月10日上午，由中铁十二局承建的渝昆高铁控制性工程华山松隧道实 现安全贯通，为全线建成开通奠定了坚实基础。 （文章来源：新华社） 渝昆高铁全长约700公里，其中云南段长388.6公里，是云南省内首条时速350公里的高速铁路，全线建 成通车后，重庆到昆明的行车时间将压缩至两个半小时左右，对推动沿线地区经济社会高质量发展具有 重要意义。目前，渝昆高铁云南段建设全面进入冲刺阶段，全力推进隧道工程、无砟轨道和站后工程建 设。 ...

1月15日，记者从四川省公共资源交易信息网获悉，《新建沪渝蓉高铁重庆至成都段使用林地可行 性报告编制及林木采伐作业设计咨询服务》正在招投标，透露了成渝中线高铁的建设方案。 从方案可以看出，成渝中线高铁将从重庆北站引出，终到成都站（即火车北站）。从名称来看，成 渝中线高铁将成为新建沪渝蓉高铁的一部分。新建沪渝蓉高铁也叫沿江高速铁路，它位于长江经济带的 核心线位上，串联起长三角城市群、长江中游城市群、成渝城市群三大经济重地。 招标文件还透露，成渝中线高铁铁路等级为高速铁路，正线数目为双线，设计速度350公里/小时、 预留400公里/小时。这也是国内首条提出时速要达到400公里的高铁。（记者 王眉灵） 根据招标文件，新建沪渝蓉高铁重庆至成都段使用林地可行性报告编制及林木采伐作业设计咨询服 务已由中国国家铁路集团有限公司发展和改革部以发改项目函〔2020〕19号批准建设，项目业主为成渝 铁路客运专线有限责任公司。 新建沪渝蓉高铁重庆至成都段（即成渝中线高铁）项目，线路起自重庆市江北区，终至四川省成都 市金牛区，正线长度292.032公里，其中重庆段100.749公里、四川段191.283公里，新建车站7座。项目 全线 ...

崇启公铁长江大桥北引桥采用公铁合建方案，全长1069.27米。上层为双向6车道的1级公路，下层为双线高铁+双线城际。其中主桥6号-NC21号墩城际侧 采用移动模架施工，主桥6号—N12号墩、N16-N18号墩铁路侧采用现浇支架；N13-N16,N18-N27号墩铁路侧为预制架设。本次浇筑的为崇启公铁长江大桥 城际侧NC20-NC21号墩梁，长40.6米，宽12.2米，浇筑混凝土总量344方，采用移动模架法现浇施工。 12月15日17:58，经过10个小时的连续作业，由中铁大桥局承建的崇启公铁长江大桥北引桥城际侧最后一孔移动模架现浇梁顺利浇筑完成，标志着大桥下 层铁路梁现浇施工任务圆满收官，为后续全面转入上层公路梁施工奠定坚实基础。 据中铁大桥局沪渝蓉高铁V标项目部北岸工区负责人范志晶介绍：通过使用可移动的模板系统，在桥梁的墩台之间逐段浇筑混凝土梁体，实现连续循环作 业，显著缩短施工周期，减少对周围环境的影响，且不受地形限制。 冬季来临，为充分做好城际侧最后一孔移动模架现浇梁的准备工作，项目部避开零度以下低温时段，提前召开专项交底会，优化完善现浇施工方案，组织 技术人员全程量测砼温度，确保砼施工质量满足规范要求 ...

渝昆高铁洛泽河特大桥合龙 中新网昭通12月16日电 (郑利超 李浦实)15日，由中铁大桥局集团承建的渝昆高铁控制性工程洛泽河特 大桥合龙，为渝昆高铁如期建成通车打下坚实基础。 洛泽河特大桥位于云南省昭通市彝良县，跨越深切峡谷，两端与隧道相接，为山区铁路典型的"两隧夹 一桥"V形地貌。桥梁长524.9米，为双幅单线预应力混凝土刚构连续梁桥，主跨180米，最大墩高达150 米。 建成后的洛泽河特大桥将成为目前世界时速350公里高速铁路跨度最大、墩身最高、边坡最高的预应力 混凝土梁桥。 面对山区峡谷复杂环境下高墩、大跨桥梁施工安全风险高的困境，项目建设团队将主梁施工优化为大节 段悬浇工艺，最大节段长度调整为6米，悬浇节段数量减少至17节，提前工期2个月。 渝昆高铁全长约700公里，其中云南段长388.6公里，是云南省内首条时速350公里的高速铁路。全线建 成通车后，重庆到昆明的行车时间将压缩至两个半小时左右。(完) 来源：中国新闻网 编辑：郭晋嘉 广告等商务合作，请点击这里 本文为转载内容，授权事宜请联系原著作权人 中新经纬版权所有，未经书面授权，任何单位及个人不得转载、摘编或以其它方式使用。 关注中新经纬微信公众 ...

Core Insights - The completion of the last pair of long steel rails on the Shending River Grand Bridge in Shiyan, Hubei marks the successful completion of the track-laying project for the Xi'an-Shiyan High-Speed Railway, laying the groundwork for subsequent joint debugging and testing [1] Group 1 - The Xi'an-Shiyan High-Speed Railway is an important part of the national high-speed railway network [1] - The total length of the main line is 255.7 kilometers, with a designed speed of 350 kilometers per hour [1]

Group 1 - The Daping Tunnel, a key project of the Yukun High-Speed Railway, has successfully completed its construction, marking significant progress in the railway's development [1] - The Yukun High-Speed Railway spans approximately 700 kilometers, with 388.6 kilometers located within Yunnan Province, making it the first high-speed railway in the province designed for a speed of 350 kilometers per hour [2] - The completion of the Yukun High-Speed Railway will significantly reduce travel time between Chongqing and Kunming, enhancing transportation convenience in the southwestern region and promoting coordinated regional development [2] Group 2 - The construction of the Daping Tunnel faced complex geological conditions, including high-risk factors such as mud and water bursts, soft rock deformation, and high ground stress [1] - The construction team employed advanced techniques, including "long tunnel short strike" methods and various predictive technologies, to effectively manage the risks associated with the challenging geological environment [1] - With the Daping Tunnel's completion, 48 tunnels in Yunnan Province for the Yukun High-Speed Railway have been completed, exceeding 90% of the total tunnel construction [1]

Group 1 - The Hailar-Yichun High-Speed Railway (Ha-I High-Speed Railway) has completed its track-laying, marking a significant milestone in China's "14th Five-Year Plan" key projects [1] - The railway is an important extension of the "eight vertical and eight horizontal" high-speed rail network, specifically the Beijing-Harbin and Beijing-Hong Kong-Macau corridors [1] - The project faced various construction challenges, including the distribution of island-like permafrost and a short effective construction period due to extreme weather conditions [1] Group 2 - The construction utilized advanced group sleeper laying technology, achieving an average daily track-laying progress of 2.5 kilometers, which is a 50% efficiency improvement over traditional methods [1] - The project incorporated information technology and intelligent management techniques, enabling remote real-time monitoring of key equipment to ensure operational safety [1] - The next phase of the project will focus on fine-tuning the track, electrical systems, and testing, which is expected to enhance the high-speed rail network in Northeast China and promote regional economic development [2]

Core Points - The Yukun High-speed Railway's Yunnan section has achieved over 90% tunnel completion with the recent breakthrough of the Daping Tunnel [1][3][5] - The Daping Tunnel, a critical project, spans 12.3 kilometers and is classified as a high-risk tunnel due to its challenging geological conditions [3][5] - The construction employs advanced technologies to mitigate risks, successfully navigating through high-risk segments [3][5] Group 1 - The Yukun High-speed Railway will significantly reduce travel time between Chongqing and Kunming, enhancing economic development along the route [5] - The Yunnan section of the railway is 388.6 kilometers long, with a design speed of 350 kilometers per hour, marking it as the first high-speed railway in Yunnan to reach this speed [5] - Currently, over 14,000 construction workers and more than 1,500 large machinery units are engaged in the project, with earthworks and bridge-tunnel construction nearing completion [5]

Core Points - The Harbin-Yichun high-speed railway (Ha-I high-speed railway) has completed its full track laying, paving the way for subsequent debugging and testing [1][3] - This railway is a significant extension of China's "eight vertical and eight horizontal" high-speed rail network, specifically the Beijing-Harbin and Beijing-Hong Kong-Macau corridors [1] - It is notable for being the highest latitude high-speed railway under construction in China, with the largest annual temperature difference and the first to traverse an island-like permafrost area [1] Summary by Sections - **Construction Progress** - The Ha-I high-speed railway began track laying on May 28, 2024, with an average daily progress of 2.5 kilometers, which is a 50% increase in efficiency compared to traditional methods [3] - The project has utilized information technology and intelligent management systems for real-time monitoring of key equipment [3] - **Future Development** - The next phases will focus on fine-tuning the track, completing the "four electrical" projects, and conducting joint debugging and testing [3] - **Economic Impact** - Once completed, the Ha-I high-speed railway will enhance the high-speed rail network structure in Northeast China, playing a crucial role in promoting regional economic and social development [3]

Core Points - The Yiliang Tunnel right line of the Yukun High-speed Railway, constructed by China Railway Construction Bridge Bureau, has successfully completed its safe breakthrough after over 1460 days of continuous work [1][3] - The tunnel, located in Yunnan Province, spans 24.8 kilometers with a maximum depth of 920 meters, designed in a double-tunnel single-line format [1][3] Construction Progress - The breakthrough of the right line has accurately identified geological conditions, significantly improved ventilation and drainage, and effectively reduced geological risks, enhancing safety and efficiency for subsequent construction [3] - With the completion of the right line, 47 tunnels in the Yunnan section of the Yukun High-speed Railway have been completed, exceeding 85% of the total tunnel work [3] - The Yukun High-speed Railway, approximately 700 kilometers long with a Yunnan section of 388.6 kilometers, is designed for a speed of 350 kilometers per hour, marking it as the first high-speed railway in Yunnan to reach this speed [3] Economic Impact - Once completed, the railway will significantly reduce travel time between Chongqing and Kunming, playing a crucial role in constructing a new development pattern and promoting high-quality economic and social development in the surrounding areas [3]