The total length of Tongming Haite Bridge is about 5762 meters. The main bridge is a double-tower double cable-stayed cable-stayed bridge with a span of 146+338+146 meters and a tower height of about 121 meters. It is currently the first long-span sea-tower in western Guangdong. Pull the bridge. The bridge site is in the typhoon, thunderstorm, tropical storm frequent impact area and mangrove nature reserve, and the construction is extremely difficult.
In the construction of the project, in order to overcome the impact of earthquakes and typhoons on the bridge and speed up the construction progress, the pile foundation of the main pier of Tongming Haite Bridge uses bored piles with a diameter of 2.8-3.1 meters, the pile length is 138 meters, and the drilling platform reaches the bottom of the pile. 146 meters, there is no precedent for the construction of large diameter ultra-deep piles for drilling and drilling.
In order to ensure the integrity and quality of this large-diameter ultra-deep pile body, Poly Project Department organized a special technical seminar to cooperate with Sany Heavy Industry to manufacture SR420 rotary drilling rig for the project construction requirements. With the guarantee of equipment, the fastest construction period of the main pier single pile is 4.5 days, and the record of the pile diameter of 2.8 meters and the hole depth of 146 meters is “the deepest super long pile foundation in China”.
At the same time, in order to avoid the impact of the typhoon period on the quality and progress of the project, the main pier caps adopt the overall hoisting process of the box, and the pontoon construction of 10,000 square meters is completed in only 38 days, creating the domestic large-capacity capping construction. At a speed, it also provided a strong guarantee for the smooth cooperation of the main bridge.
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