The first -made box beam test rack on Shanhai Express Road, Yantai City Successful

Jiaodong Online, July 7 (Reporter Wang Xiangrong Correspondent Tang Chengyao Xu Xiaoshan Zhao Dili) On the morning of July 7, the Yantai City Express Road Shanhai Road project undertaken by China Construction Eighth Bureau successfully completed the test of the first prefabricated box beam. The project entered a new stage of the upper structure construction and sounded the horn of progress for subsequent construction.

There are 1825 prefabricated small box beams across the project, and the concrete strength level of the prefabricated box beams is C50, and there are two spans: 28m and 30m. It adopts the continuous structural form of the bridge deck before the simplified branch and then the bridge deck.

This time the test beam single film is the most heavier of 99.2 tons. The prefabricated box beam is large, heavy weight, high construction organization technical requirements, and difficulty in transportation of beam boards. At the same time, the construction of the lower part of the main bridge, more than 10 types of underground pipelines and the construction of ramp bridge construction are very limited.

The technicians of the project department use the BIM model plus the drone tilting photography model to combine the reality and reality technology to simulate the operating conditions of the car hanging operation, determine the position, the sequence of the lifting, the temporary storage position of the small box beam The plan is feasible and targeted to ensure the smooth progress of the small box beams.

This beam is transported by a dedicated beam car, and a 300 -ton car crane and a 200 -ton car crane are combined with the two -machine lifting hanging. The on -site command was uniformly commanded by the professional lead operator. Two cranes slowly lifted the box beams and lift off. When the rising height of the box beam exceeds the bridge (bridge pier) covering the beam surface, the lifting of the hanging box beam is turned into the installation area through the side of the crane. The synchronous arm operation makes it accurately put in place, and finally achieve the simultaneous improvement, simultaneous steering, and synchronous falling beam of lifting.

From the north of the project to the south of the Tashan Tunnel, the south of Greenstad, the total length is about 5.7 kilometers. As the important "one vertical" in the first expressway and Yantai "one horizontal two vertical" expressway network as the "12335" construction idea of ​​the central urban area. The "axis+grid" expressway layout will be formed, and the external and highway integration will be connected. It will contact important passenger and freight hubs and key urban development areas internally.

In order to ensure the quality of the project, from the beginning of the winning bid, the project team began to start planning at a high starting point. Level smart construction site, and the quality goal of creating the National High -quality Engineering Award.

Since the beginning of the project, the project has faced problems such as tight construction period, difficulty in transportation organization, difficulty in the protection of pipelines, large -scale lifting construction, prefabricated small box beam prefabricated and setting conditions. In response to the above issues, the Yantai Municipal Party Committee, Municipal Government and Rail Group are fully supported. The company's leadership and project team attach great importance to formulating targeted measures on related issues to ensure the smooth progress of the project.

自2021年12月26日开工以来，项目团队充分发挥“令行禁止使命必达”的铁军作风，起步即冲刺，开局即决战，科学组织施工，以铁军效率助力项目履约：2021年12月26日， The first pile foundation opened drills; on February 19, 2022, the first inheritance platform was completed; on March 10, 2022, the first pier pillar was smoothly poured; on March 25, 2022, the first prefabricated beam in the prefabricated beam is completed Production; on May 21, 2022, the first cover beam was successfully poured; on July 7, 2022, the first box beam was successfully set up. At present, the project has completed a total of 767 pile foundations, 172 inheritance, 171 pier pillars, 38 poured beams, and 619 prefabricated small box beams.

Xu Zenghu, deputy director of Yantai City Express Road, Zhang Xuechao, member of the Party Committee and Deputy General Manager of Yantai Rail Transit Group Co., Ltd., Wu Hua, deputy general manager of China Construction Eighth Bureau (Yantai) Construction Co., Ltd. Wang Bing, deputy general manager of the company and head of Shanhai Road project, attended the ceremony.

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