Core Viewpoint - The company, China Communications Second Highway Engineering Bureau Co., Ltd., is a key player in bridge construction in the Yangtze River Delta, contributing to regional development through innovative and high-quality bridge projects [1][2]. Group 1: Company Overview - The company focuses on "high-tech, special, and difficult" bridge construction, aiming to enhance its brand through high-quality projects with excellent market image and customer satisfaction [2]. - It has participated in the construction of several world-leading bridges in the Jiangsu section, including the Runyang Yangtze River Highway Bridge and the Su-Tong Yangtze River Highway Bridge [2]. Group 2: Technological Innovations - The Nanjing Xinxingxu Yangtze River Bridge, with a main span of 1,760 meters, is now the largest in China and the third largest in the world, showcasing the company's innovative capabilities [3]. - The construction of the bridge's north anchor block involved a large-scale caisson structure that required precise sinking to a depth of 50 meters, equivalent to nearly 17 stories [5]. - The project team implemented innovative techniques such as the "air curtain" method to facilitate the sinking of the caisson, significantly reducing friction and accelerating the process [6][8]. Group 3: Construction Techniques - The company has successfully integrated advanced construction methods, such as the "piling and freezing method," to address challenges posed by groundwater during the construction of the south anchor block of the Runyang Yangtze River Bridge [7]. - The use of a new drainage and non-drainage sinking method at the Taizhou Bridge achieved a precision level exceeding standard requirements by 50 times [11]. Group 4: Equipment Development - The company developed a fully automated hydraulic cable hoisting machine capable of lifting loads up to 740 tons, which played a crucial role in the construction of the Runyang Yangtze River Bridge [9]. - The introduction of a central double cable surface hoisting machine at the Jiangxinzhou Yangtze River Bridge ensured high precision and efficiency in the installation of the bridge's superstructure [10]. Group 5: Quality Control - The company maintains a rigorous standard for construction precision, achieving a center plane deviation of only 9 millimeters and a tilt of 0.0007 at the Nanjing Yangtze River Bridge's south anchor block [11]. - The construction of the Jiangxinzhou Yangtze River Bridge required meticulous operations within a 70-centimeter gap, ensuring that elevation and planar coordinate errors did not exceed 2 millimeters [11].