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深入研究了应力控制标准的原理,认为应力控制标准是最安全、实用的控制标准,结合全程监控技术,提出了一个完整的连续桥梁支座更换施工的实用应力控制标准,适用于多跨连续梁桥局部顶升施工控制。其方法是:利用施工仿真得到成桥状态应力场,建立关键部位应力控制指标,通过布设的应变计进行全程应力监控。方法成功地应用于某1联4跨先简支后连续大桥局部顶升支座更换施工实际工程,效果很好。
In-depth study of the principle of stress control standards, that the stress control standard is the safest and practical control standards, combined with the whole monitoring technology, put forward a complete continuous bridge bearing replacement construction practical stress control standard for multi-span continuous beams Bridge local jacking construction control. The method is as follows: using the construction simulation to get the stress field of the bridge, setting up the stress control index of the key parts, and monitoring the whole stress through the strain gauge. The method has been successfully applied to the practical engineering of replacing the local jacking support of a 1-for-4 4-span simply supported continuous bridge with good results.