Core Points - The Hainan Tunnel, the first major tunnel of the Xichang to Shangri-La Expressway, has achieved dual-lane completion, marking significant progress in the construction of the Xichang Expressway [1][3] Group 1: Project Overview - The Xichang Expressway is planned to have a total of 16 major tunnels, with 57 kilometers of tunnel excavation completed to date [3] - The Hainan Tunnel features a left line of 3,448 meters and a right line of 3,508 meters, designed for a dual four-lane standard with a speed limit of 80 km/h [3] Group 2: Construction Challenges - The tunnel is located in a high seismic intensity area and traverses complex geological formations, including shale, sandstone, and mudstone, with over 72% of the surrounding rock classified as V-grade, indicating poor self-stability [3] - The construction team has implemented innovative management techniques leveraging IoT technology to address geological challenges, including a digital management platform for 24/7 monitoring [3] Group 3: Environmental Considerations - To minimize ecological impact, a wastewater treatment system has been employed, implementing a "clean and sewage separation" approach, with treated water reused for dust control and forest spraying [3]

Core Viewpoint - The expansion project of the Beijing-Harbin Expressway (Jingha Expressway) in the Shenshan section is progressing steadily, with expected completion for the Beijing direction by the end of July and full two-way ten-lane operation by the end of September, one year ahead of schedule [1][2] Group 1: Project Overview - The Shenshan section of the Jingha Expressway is a crucial transportation artery in Liaoning, originally a two-way six-lane road that has been in service for 22 years, now unable to meet the increasing travel demands due to rapid economic development [1] - The expansion project, initiated in August 2022, spans 238.04 kilometers, starting from the Jiumenkou Tunnel in Suizhong County and passing through various cities and counties, involving 15 toll stations, 20 interchanges, 6 service areas, and 58 overpasses, with the main line of 222.08 kilometers [1] Group 2: Construction Challenges and Innovations - The construction faced numerous challenges, prompting the adoption of an innovative "construction while traffic" model, enhancing emergency response efficiency and optimizing traffic organization through dynamic adjustments [2] - New technologies such as "dual-layer continuous paving + 3D intelligent paving" have been implemented to improve road surface precision and paving efficiency, alongside a smart management platform for real-time monitoring of the entire construction process [2] Group 3: Progress and Impact - As of June 22, the project has achieved significant completion rates: 98.6% for the subgrade, 99.8% for bridges and culverts, 92.8% for pavement, and 94.3% for tunnels [2] - The completion of the expressway is expected to greatly enhance traffic efficiency and service levels, significantly improving regional transportation conditions and promoting economic collaboration and revitalization in Northeast China [2]

证券代码：002307 证券简称：北新路桥 公告编号：2025－23 证券代码：002307 证券简称：北新路桥 公告编号：2025－23 露的数据可能存在差异，仅供投资者参阅。 二、截至报告期末重大项目履行情况 | 项目名称 | 业务 | 签订日 | | 工期 | 合同价款 | 履行情况 | | --- | --- | --- | --- | --- | --- | --- | | | 模式 | 期 | | | （万元） | | | | | | | | | 截至 年 月 日，项目 2025 3 31 | | 合川双槐 至钱塘高 | 施工 | 2020 | 年 | | | 已完成项目施工的 100%，对 上计量 29 期。不存在未按合 | | 速公路项 | 总承 | 2 月 | 28 | 3 年 | 324,900.00 | 同约定及时结算与回款的情 | | 目 | 包 | 日 | | | | 况，交易对手方的履约能力不 | | | | | | | | 存在重大变化。 | | | | | | | | 截至 年 月 日，项目 2025 3 31 | | G3 京 台 | 施工 | 2022 | 年 | | | ...