Zhangzhou, China
Zhangzhou, China

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Yi Y.-K.,Xiamen University of Technology | Yi Y.-K.,Fujian Xiazhang Bridge Co. | Yan H.-Z.,China Railway Major Bridge Nanjing Bridge and Tunnel Diagnosis and Remedial Co. | Zhao K.-P.,The 5th Engineering Co. | Yue Q.,China Railway Major Bridge Nanjing Bridge and Tunnel Diagnosis and Remedial Co.
Bridge Construction | Year: 2013

The north main bridge of the Xiazhang Sea-Crossing Bridge is a steel box girder cable-stayed bridge with double pylons and double cable planes. The main girder of the bridge was erected by the cantilever assembling method and the central span was closed by the technique of cutting and pushing. Before the span was closed, the closure gap was continuously observed and the closure gap width-temperature curves were fitted. In the light of the predicted width of the closure gap, the material for the closure block was laid off and also at the temporary fixity of a pylon and the girder, the girder was pushed towards one side and/or withdrawn a little amount. Practice proves that the technique of the cutting and pushing closure applied to the bridge not only ensures the closure block to be smoothly lifted into the closure gap and but also achieves the ideal width of the welding seams. With the technique, the reliability of the closure is improved and the structural safety risk is decreased.


Yi Y.-K.,Xiamen University of Technology | Yi Y.-K.,Fujian Xiazhang Bridge Co. | Wang M.-L.,Fujian Xiazhang Bridge Co. | Wu B.,Fujian Xiazhang Bridge Co. | Zhong Q.,Fujian Xiazhang Bridge Co.
Bridge Construction | Year: 2013

The Xiazhang Sea-Crossing Bridge, totally 9.333 km long, is made up of four major parts of the north bridge, Haimen Island interchange and toll service area, south bridge and Haiping interchange. The construction conditions (including the severe stratum weathering, strong corrosive marine environment, frequent typhoon visiting and high intensity earthquake) of the bridge are complicated. In this paper, the critical technical problems and countermeasures taken in the construction of the bridge are summarized. In the light of the special engineering geology of the north main bridge, the measures of adjusting the span length of the cable-stayed bridge, utilizing the short and long piles and improving the boring machines were taken. To ensure the durability of the structures of the whole bridge, the corrosion protection measures of the high performance marine concrete and rust inhibitor for the concrete structures and the long-term protection coating system and dehumidifiers for the steel structures were taken. To ensure the wind safety of the south and north main bridges, the wind resistant measures of utilizing the temporary piers in the construction process and the guide vanes, dampers, vibration absorbers at the operation stage were taken and to meet the specified seismic resistance target, the measures of utilizing the dampers for the main bridges and the sliding and limiting lead core rubber bearings for the approach bridges were taken.


Yi Y.-K.,Fujian Xiazhang Bridge Co. | Xie Z.-F.,China Communications Construction Company Ltd. | Niu H.-X.,China Communications Construction Company Ltd.
Bridge Construction | Year: 2013

The main bridge of the south bridge of the Xiazhang Sea-Crossing Bridge is a steel and concrete composite girder cable-stayed bridge with double pylons and parallel cable planes. Originally it was decided that the closure of the central span of the main bridge was to be carried out, using the cutting closure scheme, but because the temperature prediction of the scheme was demanding and the starting time for the closure was uncertain, the cutting closure scheme was therefore changed into the technique of the fixed time closure. The technique was that after the second girder segment of the main bridge was installed nearby the closure gap, the expanded closure gap was consecutively observed, the material for the closure segment was laid off in advance and immediately after the last typical segment was installed, the closure segment was lifted in place and installed. In the technique, the slotted hole tool plates and the temporary connectors were used as the auxiliary tools, the closure gap was firstly fixed by the plates and connectors, the dimensions of the permanent splice plates were then confirmed and finally the tool plates would be replaced with the permanent splice plates and the closure of the central span was completed. With the technique of the fixed time closure, the closure of the central span of the bridge proceeded smoothly. Practice proved that the technique relaxed the accuracy requirement for the system deformation prediction, increased the reliability of the closure and reduced the safety risk of the structure.

Loading Fujian Xiazhang Bridge Co. collaborators
Loading Fujian Xiazhang Bridge Co. collaborators