超深地下连续墙大体积水下混凝土浇筑方法的研究

摘要:

基于昆明某超深基坑围护工程,对该项目施工过程中超过96 m的地下连续墙围护结构施工中大体积水下混凝土浇筑的控制要点进行研究。根据实际施工经验,结合理论分析,对浇筑前的准备工作、浇筑过程控制以及浇筑异常情况进行了详细分析与阐述。结果表明在浇筑大体积混凝土之前需规划好混凝土罐车运输的交通路线,以保障浇筑不中断；并且首灌混凝土方量也需要进行计算,保证浇筑底管埋深≥2.5m,确保浇筑质量。

Abstract:

Based on an ultra-deep foundation pit enclosure project in Kunming, the control points of large-volume underwater concrete pouring in the construction of the underground diaphragm wall enclosure structure exceeding 96 m during the construction process of the project were studied. According to the actual construction experience, combined with theoretical analysis, the preparation work before pouring, pouring process control and pouring abnormal situation are analyzed and explained in detail. The results show that the transportation route of the concrete tank truck should be planned before pouring the mass concrete, so as to ensure that the pouring is not interrupted; and the amount of the first poured concrete also needs to be calculated to ensure that the depth of the bottom pipe is ≥2.5m to ensure the quality of the pouring.