宁波轨道交通7号线开通运营

Core Viewpoint - The Ningbo Metro Line 7, constructed by China Railway Sixth Group's transportation division, has officially commenced operations, bringing the total operational mileage of Ningbo's metro system to 262 kilometers [2]. Group 1: Project Overview - Ningbo Metro Line 7 has a total length of 39.4 kilometers, entirely underground, with 25 stations starting from Yinzhou Yunlong and ending at Zhenhai Yufan [2]. - The line connects several key areas including Qiuai, Eastern New Town, Sanjiangkou, Old Bund, Wantou, Zhuangqiao, and Zhenhai New Town [2]. Group 2: Technical Challenges and Solutions - The project faced significant technical challenges due to Ningbo's soft soil, abundant groundwater, and complex geological conditions [2]. - The project team emphasized the construction of a structural self-waterproofing system, utilizing reinforced concrete as the primary method, supplemented by a flexible full-package waterproof layer for enhanced protection [2]. Group 3: Quality Control Measures - The project implemented a strict "three-inspection system" and "sample-based guidance" to ensure quality control throughout the construction process [2]. - Automated monitoring equipment was introduced to continuously track structural deformation, surrounding building settlement, and groundwater level changes, with real-time data uploaded to a smart construction platform for early risk detection and management [2]. Group 4: Noise Control Measures - Special funds were allocated for the procurement of low-noise equipment, and soundproof covers were installed on high-noise machinery [2]. - During nighttime construction, high-noise operations were strictly limited, and hydraulic breakers were used instead of traditional blasting to keep noise levels below 55 decibels, minimizing the impact on nearby residents [2].