Huimin Avenue Comprehensive Improvement Project, Third Bidding Section
At present, Xiaguan Riverside Business District is fully committed to the construction of "2+2" (two subways + two passages) municipal major transportation projects in the region. Among them, the Jianning West Road river crossing and Huimin Avenue comprehensive renovation project as its southern connection will jointly build a new fast road network and further strengthen the interoperability with the core area of Jiangbei and the transportation interconnection of the northwestern part of the main city.
handful"gas stationery"Huimin Avenue comprehensive renovation project is an important part of the Jiangnan link of Jianning Road West Crossing, the project from the south of Xinxing Road, north to the south of the city of Henan Road, about 2.37 kilometers long, the entire line of the simultaneous construction of the integrated pipeline corridor 1.99 kilometers. The project's third section of the tunnel pit built by the deepest nearly 30 meters, the widest 55.6 meters, the pit plane from the air as a "gas gun".
Underground four-level "T" interchange Huimin Avenue comprehensive renovation project in the form of long tunnels connected to the Shimonoseki Bridge and Mufu West Road elevated, and Jianning Road intersection to set up an underground four-level "T" interchange, and Jianning Road, west of the river channel to achieve rapid traffic conversion. The third section of the project starts from Jianning Road in the south and ends at Nanjing West Railway Station in the north, with a total length of 485 meters, and the main construction content is the new underground interchange tunnel and comprehensive pipeline corridor project. At this stage, it mainly carries out earth excavation and main structure construction.
Technological construction escort project construction three-dimensional intersections, technical difficulties, the main structure of the compartments, complex structure, the pit is dotted with steel support and concrete support, together to support the excavated workspace. The steel supports are supported by axial force compensation technology, which adopts a servo system with sensors and jacks at the end of the steel supports to ensure that the axial force is automatically compensated, so as to ensure that the support axial force of the foundation pit conforms to the design under different working conditions. During the construction process, the quality of the diaphragm wall enclosure structure is strictly controlled, and the mud meets the specification requirements by controlling the mud index during the trench formation process. Aiming at the geological characteristics of silt powdery clay, the participating units did a good job in water reduction and water isolation measures, and constructed the enclosing structure diaphragm wall to a depth of 60 meters, with each wall penetrating deep into the rock layer, and MJS water stopping piles were adopted between the joints of each two diaphragm walls to ensure that the groundwater was isolated. Various monitoring facilities such as static level meter and inclinometer are utilized to monitor the foundation pit in real time and provide real-time feedback data to make the deformation of the foundation pit controllable.
