on February 27, after 19 hours of pouring, the first pier body of No.10 pier, the highest pier of Zhamaohe Bridge on Tongsai Highway, was successfully poured. Under the cold and high altitude weather, the construction personnel worked in shifts continuously, grabbed sunny and snowy days, and successfully realized the first bridge pier body pouring of the whole line of Tongsai Project in 2023. It marks that the construction of the same competition project has entered a comprehensive stage.
The Zha Mao River Bridge is one of the control projects of the whole line. The No.10 pier is 151.7 m high, which is the highest pier of highway bridges in Qinghai Province. The first pier body is 6m high, and 558m3 of C50 concrete is used. It is a rectangular hollow pier with single box and three cells. Its structure is complex, the construction is extremely difficult, and the construction risk is high in cold season. The successful pouring of the first formwork pier body has accumulated experience for the subsequent construction of the pier body and promoted the construction progress of the control project.
In order to ensure the pouring quality of the first section of the pier body, the headquarters of the Provincial Communications Construction Company organized the construction units and teams to carry out three-dimensional visual disclosure in advance, so that the technicians and constructors could understand the complex structure of the project more vividly and concretely. At the same time, we should improve and perfect the winter construction plan, leadership, division of labor among technicians, distribution of machinery and operators, rewards and penalties and other safeguards. Carry out the first piece acceptance system, formulate the prevention and control manual for common quality problems, clarify the process flow, strengthen the process tooling measures, ensure that the concrete pouring, steel bar spacing and protective layer thickness meet the design and specification requirements, and ensure that the quality and safety progress go hand in hand. The expressway
from Tongren to Saierlong (boundary between Qinghai and Gansu), with a total length of 204.52 kilometers, is an important part of the trunk highway network and expressway network in Qinghai Province. After the completion of the project, a new pattern will be formed to further promote the development of the western region, speed up the improvement of the national expressway network and improve the regional transportation conditions. It is of great significance to promote transportation interconnection, balanced and coordinated development, promote rural revitalization and improve the level of economic and social development in Qingganchuan region.
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