作为保护北京市中心城区的重点河段，卢沟桥至三家店段17.4公里长的河道的综合提升工程将有效提升 城市段行洪能力，消除堤防超高不足、冲刷严重、强度不足等防洪安全隐患，抵御可能遭遇的最大洪 水，保障首都防洪安全。"这一段堤防最后一次加固治理是在1983年，至今已经安全服役40余年，从土 木工程耐久性来看，也基本达到了它的使用年限。"李熙说，正基于此，该工程创新性地研发了23米 深、双墙型π结构的垂直防护结构——防洪墙，"墙体完全位于土体下方，厚度达到0.8米，相当于给左 堤装上了一套护盾铠甲，专门抵御永定河侧向冲过来的高速水流。项目建成后，永定河左岸将能抵御 16000立方米/秒的洪水冲击，显著提升防洪能力。" 李熙表示，工程按照"平急两用"的理念进行了堤防的复合性功能设计，堤顶空间也得到了充分利用。汛 期，抢险车辆、防汛车辆直接上到堤顶，观察洪水险情；平时，老百姓可以利用这条道路游览散步，成 为商业联通的路网。"把边坡放缓做绿化，把原来的刚性结构进行柔化处理，这样既能保障防洪安全， 又能满足后续开发和建设滨水空间的需求。"李熙说。此外，结合堤顶路，从首钢园到园博园将形成一 条9.1公里的慢行道路，明年4月开放给 ...

Core Insights - The "Yongding River Collective" has become a popular new landmark in Beijing, combining urban life and nature while serving as part of the Yongding River Lu San Section Comprehensive Improvement Project, which aims to enhance flood resilience and create high-quality waterfront spaces [1][4][11] Group 1: Project Overview - The Yongding River Lu San Section Comprehensive Improvement Project is a post-disaster recovery initiative following the "23·7" flood, focusing on both flood safety and the development of surrounding areas [4][12] - The project spans 17 kilometers, with a 1.6-kilometer demonstration section where the "Yongding River Collective" is located, connecting Shijingshan and the Yongding River [8][12] Group 2: Design and Functionality - The design incorporates a "dual-use" strategy for the levee, allowing for emergency vehicle access during floods while also serving as a recreational space for the public [6][10] - The project emphasizes ecological considerations, aiming to restore the river to a "flowing, green, clean, and safe" state, while minimizing artificial structures to maintain natural aesthetics [10][11] Group 3: Community Impact - The "Yongding River Collective" has significantly increased foot traffic to the area, attracting families and enhancing the local economy [2][11] - Future plans include expanding the project to further enhance the waterfront experience and integrate more cultural and commercial activities [11][12]

Core Viewpoint - The Yongding River Lusan Section Comprehensive Improvement Project is nearing completion, featuring a 4.6-kilometer waterfront slow-moving system that will connect with an existing system to create a total of approximately 9.1 kilometers of recreational space along the river [1][2]. Group 1: Project Overview - The project includes the construction of a 4.6-kilometer long embankment top slow-moving system, which will be completed next year [1]. - The newly constructed embankment will enhance the flood control capacity through the addition of a vertical anti-erosion wall, which is 23 meters deep and 0.8 meters thick [2]. - The project is part of the post-disaster recovery efforts following the "23·7" flood in the Haihe River basin, aimed at improving the flood control system and the ecological environment of the Yongding River [2][3]. Group 2: Environmental and Recreational Aspects - The slow-moving space on the embankment will provide citizens with opportunities for walking, running, cycling, and enjoying river views, enhancing public access to the water [1]. - The project will also include ecological restoration efforts, such as planting various species of plants along the embankment and restoring riverbank areas [2][3]. - The Yongding River management is currently in a critical phase of a three-year improvement project, which includes multiple sections and aims to enhance both flood control and recreational spaces for the public [3].