国产sm精品全国_最新亚洲精品视频在线_天天看在线视频国产_精品三级不卡在线观看视频

The Lingdingyang Bridge, a steel box girder suspension bridge with the largest span in the world, is like a giant dragon lying on the broad and rippling sea. At an altitude of 90 meters above the sea, the steel box girder lifting work of the bridge is in full swing.

The steel box girder was lifted smoothly up to the designed elevation, and the construction workers pinned together the sling and the permanent lifting point of a girder segment.

A steel box girder was transported by a carrier to the west anchorage of Lingdingyang Bridge.

A steel box girder was being lifted up.

Before a lift, the construction workers tightened the hoop of the cable crane.

A lift started after the spreader of the cable crane is connected to the temporary lifting point of the steel box girder.

When the steel box girder was lifted in place, the construction workers pinned together the sling and the permanent lifting point of the girder segment.

The main tower of the Lingdingyang Bridge of the Shenzhen-Zhongshan Bridge is 270 meters high and has a total of 213 steel box girder segments.