Construction Techniques for Special-Shape Steel and Concrete Hybrid Pylon Columns of Shele Bridge in Taiyuan
| Author(s): |
Y.-Q. Xu
|
|---|---|
| Medium: | journal article |
| Language(s): | Chinese |
| Published in: | Bridge Construction, 2018, n. 2, v. 48 |
| Page(s): | 99-104 |
| Abstract: | The main bridge of the Shele Bridge in Taiyuan City is a special-shape single pylon cable-stayed bridge with spatial crisscross cable planes and with span arrangement (30+2×150+30) m. The pylon of the bridge takes the A shape in the transverse direction of the bridge, has no cross beams and is 113. 8 m in height. The lower columns of the pylon are the reinforced concrete structures that were cast in situ, using the formwork while the middle and upper columns are the steel structures that were constructed in the field, using the large segment hoisting and installation method. In the construction of the pylon, the anchor reinforcement for the concrete lower columns were precisely positioned, using the "stiffening frame+positioning plates". In between the two inward titling lower columns, the bracing trusses were set up to brace the columns. On the outer sides of the spatial curvature formwork, the straight cross ribs were selected so as to accommodate to the bracing surfaces of the bracing trusses. The steel and concrete joint sections of the columns were precisely positioned, using the positioning scaffolding. On the top of the scaffolding, the positioning holes were arranged and at the bottom of the joint sections, the variable-diameter pins were arranged. The parts of the steel pylon columns were fabricated in segments in the workshop, the segments were then assembled into the large ones in the field and were hoisted and installed, using the D5200-240 tower crane. The wall support for the tower crane and the second level bracing truss of the columns were designed in integrity in order to accomplish the accelerated construction of the bridge. |
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11/08/2020
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