混凝土闸墩分层浇筑时间间隔的优化控制  

Optimal Control of Time Interval for the Concrete Sluice Pier

作　　者：张杰 孙明明 

机构地区：[1]郑州工商学院建筑工程学院,河南郑州451400 [2]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《人民黄河》2018年第2期135-139,共5页Yellow River

摘　　要：在大体积混凝土分层浇筑过程中,浇筑间隔是控制混凝土温度裂缝产生的一个重要因素。针对混凝土闸墩分层浇筑时间间隔问题,通过对分层浇筑施工过程中闸墩温度应力进行分析,阐述了分层浇筑对闸墩应力的影响,并结合实例提出控制浇筑时间间隔、优化工程施工的方法。结果表明:该闸墩工程一、二期混凝土浇筑时间间隔为12 d时温度应力和保证系数均达到最佳值。以闸墩表面温度应力为控制指标,选取合理的间隔时间,不仅能降低表面温度应力、避免温度裂缝的出现,而且还可以加快施工进度、缩短施工周期。Pouring interval is an important factor to control the temperature crack of concrete in the process of layered pouring of large volume concrete. For the issue of time interval for layered pouring of concrete gate pier,the effect of layered pouring on stress of gate pier was analyzed by the analysis of thermal stress of gate pier in the process of layered pouring,the actual example was calculated and the method of controlling the pouring interval and optimizing the engineering construction was put forward. The results show that: the thermal stress and the assurance coefficient can reach the best value when the interval time of concrete pouring is 12 days in the project of gate pier. The thermal stress on the surface of gate pier is used as the control index,selecting a appropriate time interval can not only reduced the surface thermal stress to avoid the emergence of temperature cracks,but also speed up the construction schedule and shorten the construction period.

关 键 词：分层浇筑 闸墩 时间间隔 优化控制 

分 类 号：TV544.91[水利工程—水利水电工程]