码头地下连续墙长大T形钢筋笼吊装技术*

控制长大T形钢筋笼的起吊变形,是超深T形地下连续墙施工需要解决的质量大技术难题之一。在分析目前抬吊法吊装地下连续墙钢筋笼不足的基础上,提出并研究抬架垂直转体法吊装钢筋笼新技术的原理和工艺,并将其成功应用于埃及塞得东港集装箱码头二期工程项目的超深T形地下连续墙施工。施工效果证明,该新技术能很好地解决抬吊法存在的问题,简化起吊的工艺,提高起吊作业的效率及安全性,减少钢筋加劲桁架的数量,具有显著的经济效益,适用于连续墙所有形状的长大钢筋笼吊装施工。

Lifting technology for long-large T-shape steel reinforcement cage of wharf diaphragm wall

The control of lifting transmutation of the long-large steel reinforcement cage is one of the momentous technical puzzles for the construction of super-deep T-shape diaphragm walls. Based on the analysis of the existing problems of carrying-lifting method for the lifting of steel reinforcement cage, we propose a new technical principle and technology of external-truss-lifting method for the steel reinforcement cage lifting, which was applied successfully to the construction of super-deep T-shape diaphragm walls for Port Said East Container Terminal-Phase 2 Marine Works in Egypt. The construction effect proves that the existing problems of carrying-lifting method can be well solved, the lifting technology is predigested, the efficiency and security of lifting are improved, the quantity of steel reinforcement for strengthening trusses is decreased, and good economic benefit is gained. It can be applied to the lifting construction for all shape long-large steel reinforcement cages.