抗浮作用下大底盘底板后浇带施工影响研究

Study on the construction influence of the backpouring belt of large chassis bottom plate under the action of anti-floating

为研究抗浮水位改变对沉降后浇带施工质量的影响,依托实际工程,利用Midas GTS建立结构施工阶段抗浮水位计算模型,研究不同水位高度对结构的影响情况,提高了地下水的降水限值。后浇带封闭时,利用传感器得到后浇带浇筑后28 d内温度、应变的变化数据,结合理论分析,得到以下结论:提高降水安全高度后,根据规范要求,待沉降后浇带两侧结构沉降稳定后浇筑混凝土,后浇带的浇筑质量可以满足设计要求;此外在施工时应采取加强防水措施,避免钢筋锈蚀。

In order to study the influence of increasing the safety height of precipitation on the construction quality of the cast belt after settlement.In this paper,based on the actual project,Midas GTS is used to establish the calculation model of the anti-floating water level in the construction stage of the structure,to study the influence of different water levels on the structure,and raises the groundwater level limit.When the post-cast belt is closed,the sensor is used to obtain the change data of temperature and strain within 28 days after the post-cast belt is poured,and the following conclusions are obtained through theoretical analysis:After raising the safe height of precipitation,according to the requirements of the code,the concrete is poured after the settlement of the structure on both sides of the post-settlement pouring belt is stable,and the pouring quality of the post-settlement pouring belt can meet the design requirements,and waterproof measures should be strengthened during construction to avoid water seepage.