Stop at 12:00 on October 11, Tongji Bridge Reconstruction Project Department after 17 hours continuous operation to complete the new Tongji Bridge on the north side of the first foundation concrete pouring, which also marks the Tongji Bridge project officially entered the main structure of the construction phase.
New Tongji Bridge across the old Beijing Hangzhou Grand Canal, and the current old Beijing Hangzhou Grand Canal in Changzhou City the main water passage, do not have full cutoff construction conditions, to the construction of the bridge brings great difficulty, careful organization of project department take the two cofferdam of the way construction. In advance, the cofferdam is carried out in the north side of the cofferdam and the cofferdam is pumped through the cofferdam.
To ensure that the construction of the three axis of the cofferdam, the cofferdam filling (elevation control in the 2 meters), and the design of the foundation bottom elevation of -4.2 meters, the average excavation depth of 6.2 meters at the bottom of foundation pit excavation; size up to 51 x 25 meters, about 10000 cubic meters of earthwork and Tongji Bridge is located in the city center, the surrounding areas of intensive, during the day to avoid earthwork transportation rush, too late to affect the surrounding residents; especially in the northwest side of the bridge there is a high level cultural relic protection units into factory site near the pier location, earthwork required excavation, and the construction units directly out of supporting construction units, badly behind schedule the excavation of the cofferdam, the earth has brought many difficulties. For this project, the project department in time to adjust the construction ideas, the use of the east half of the excavation of the east half of the foundation of the construction of the steel template, while waiting for the completion of the northwest side of the way. September 28, a support unit to complete the support of a pull with the excavation conditions, project department immediately organized three excavators remaining earthwork construction, and finally completed the earthwork excavation of before the national day. Tongji Bridge Engineering all participating in the construction of gave up immediately to the National Day holiday, overcome the holiday of rainy weather, on October 9, the total 360t formwork installation; on the 10th night 7:45 start, with 3 sets of pump, 35 car concrete transport vehicle for coordinated operations, the successful completion of the construction task.
Based on a single area of 1100 square meters, thickness of 2 meters, concrete volume of 2200 cubic meters, these data refresh the record of Changzhou City single bridge foundation, therefore in the assembling reinforcement phase organized special meeting to make clear of the basic concrete pouring operation personnel deployment, to concrete raw materials, pump vehicle number, pump truck mounted position, concrete number of transport vehicles and routes and contingency plans for the preparation and were determined. Because of the sufficient preparation, to ensure the smooth completion of pouring, under the concern of the people of the city, showing the municipal Tiejun good to play with the shining image of tough!
Wu Hongliang Yang Jiandong Wei Wei / Wen photo