西香高速全线共规划建设16座特长隧道，目前，全线隧道工程已累计掘进57公里。海南隧道位于凉山州 西昌市邛海南侧，为分离式双洞特长隧道，其中左线长3448米，右线长3508米，按双向四车道标准建 设，设计时速80公里。作为低瓦斯隧道，该隧道所处区域地震烈度高，穿越页岩、砂岩、泥岩等复杂地 质层，且V级围岩占比超72%，整体围岩自稳能力差，同时还穿越2条富水活动断裂带，施工难度与安 全风险均处于较高水平。 据了解，为破解地质地貌带来的施工难题，海南隧道建设团队深度依托物联网技术创新管理等手段，以 科技赋能工程建设。通过搭建集视频监控、瓦斯自动监测、地质灾害监测、人员定位等功能于一体的数 字化智能管理平台，实现24小时不间断动态监控，为隧道施工装上"智慧大脑"；同时优化形成"短台 阶、多循环、强支护、快封闭"的施工工序组合，有效控制活动断裂带软岩大变形问题，保障施工安全 与进度。 同时，为最大限度降低施工对生态环境的影响，项目专门投用污水处理系统，实行洞内"清污分流"措 施，处理后全部回用于场地除尘、山林喷淋等施工环节，实现水资源循环利用。 西香高速起于西昌市小庙乡，途经盐源县，止于长柏乡川滇省界处。项目建成后，盐 ...

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 | | | ...