source: Shun Net - Ji'nan daily Author: Liu Gaojun Dai Shengbao
records from Ji'nan city construction group, the fourteen Bureau of China Railway We know that the first Ji'nan the Yellow River tunnel in the "three bridges and one tunnel" project, the first underground continuous wall in April 1st has been successfully completed, marking the construction of the main structure of the beginning of the shield machine in the North Bank of the project. It is known that
first ground continuous wall bar cage
underground continuous wall is called ground continuous wall, which is the support and enclosure of the excavation of the foundation pit of the shield, which is the first step of the foundation pit excavation. Its main functions are water interception, seepage control, load bearing and water retaining. It is composed of slots, reinforcement cage hoisting, concrete pouring and other steps. The first reinforced concrete cage of the diaphragm wall weighs 112.7 tons. After the completion of the welding area, the two crawler cars are lifted, and the whole hoisting and entering process is completed at one go. After pouring into the concrete, 365 cubic meters of concrete are poured. The
Ji'nan the Yellow River tunnel is located about 100 meters downstream of the floating bridge on the central axis of the Ji'nan City, which is under the shield section on the ground in the suspended river the Yellow River, with a length of 2519 meters in length and a double double layer with an outer diameter of 15.2 meters and an inner diameter of 13.9 meters. It is understood that the Ji'nan the Yellow River tunnel is the largest diameter shield tunnel project built on Wanli the Yellow River. It is the first shield tunnel built in the Yellow River.