| 预应力混凝土曲线连续刚构桥梁悬灌施工中线型控制方法 |
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| 引用本文： | 孙学先,杨子江,刘风奎.预应力混凝土曲线连续刚构桥梁悬灌施工中线型控制方法[J].土木工程学报,1999,32(4):51-56. |
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| 作者姓名： | 孙学先 杨子江 刘风奎 |
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| 作者单位： | 兰州铁道学院 |
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| 摘 要： | 研究了预应力混凝土曲梁桥悬灌施工中线型控制方法。在考虑了不同时间悬灌混凝土梁段徐变变形的条件下，提出了在两种坐标系中悬臂灌筑主梁时各梁段线型调整参数的计算公式。介绍了用所建立的方法对南昆铁路板其二号大桥实施线型控制的效果：既保证了合拢精度，又达到了成桥线型与目标线型的吻合。
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| 关 键 词： | 预应力混凝土 曲梁桥 线型监控 悬灌施工 |
| 修稿时间： | 1998年6月19日 |
A GEOMETRIC CONTROL METHOD FOR FREE CANTILEVER CASTING CONSTRUCTION OF PC CURVED CONTINUOUS RIGID BRIDGE |
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| Sun Xuexian,Yang Zijiang,Liu Fengkui.A GEOMETRIC CONTROL METHOD FOR FREE CANTILEVER CASTING CONSTRUCTION OF PC CURVED CONTINUOUS RIGID BRIDGE[J].China Civil Engineering Journal,1999,32(4):51-56. |
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| Authors: | Sun Xuexian Yang Zijiang Liu Fengkui |
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| Affiliation: | Lanzhou Railway Institute |
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| Abstract: | The geometric control method for fine cantilever casting construction of PC curved girder bridge are studied in this paper. Taking into consideration of the creep displacement of concrete of the beam segments casted in different times, the calculating formulas of the geometric adjustment parameters of each beam segment in both coordinates during the stage of free cantilever casting construction of girder are proposed. The geometric control result of an actual curved girder bridge, the Banqi - 2 Bridge of Nanning - Kunming Railway, using the developed method is introduced. Die to the effect of the geometric control, the precision of the joining of bridge segments is ensured, and the ultimate geometry of the bridge line coincides well with that of the objective one. |
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| Keywords: | PC curved girder bridge geometric control be cantilever casting construction |
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