Grouting guide pipe restraint ring mounting structure and method for mounting grouting guide pipes by using restraint rings

Abstract

The invention provides a method for mounting grouting guide pipes by using restraint rings. The method comprises the following steps: a, producing the restraint rings for restraining the grouting guide pipes; b, fixing the restraint rings, namely fixing the well made restraint rings onto the inner sides of bound reinforcing cage strengthening ribs; c, mounting the grouting guide pipes: individually penetrating the grouting guide pipes into the restraint rings along the length of a reinforcing cage, and fixing the grouting guide pipes and the reinforcing cage at the positions of all restraint rings; d, enabling the suspension cage to enter into a hole: after pore-forming operation is achieved, the reinforcing cage in which the grouting guide pipes are well mounted is hung into the hole; and e, untying and putting in place: releasing the top binding and fixing point of the grouting guide pipe at the reinforcing cage so as to enable the grouting guide pipe to sink into the bottom of the hole under the action of the dead weight or external force. According to the invention, while a grouting valve at a pole end is guaranteed to sink into a sediment layer at a pole bottom, the position of the reinforcing cage can be effectively controlled, the construction quality of the pile foundation project is effectively ensured, and the construction method is simple and easy to operate, and the construction and building costs are greatly saved.

Description

technical field [0001] The present invention relates to a construction site construction device and method, in particular to a grouting conduit constraining ring installation structure and a method for installing the grouting conduit on the constraining ring. Background technique [0002] Post-grouting technology for cast-in-place piles is a new technology encouraged by the Ministry of Construction to effectively improve the bearing capacity of pile foundations. Adopting this technology can effectively increase the bearing capacity of ordinary concrete cast-in-place piles by more than 30%. With its outstanding economic applicability, This technology is widely used in more and more basic engineering. As a key process to ensure the construction quality of this technology, the installation control of the grouting conduit is particularly important. [0003] At present, during the construction of post-grouting piles at the pile end, the post-grouting conduit and the steel cage a...

AI Technical Summary

Problems solved by technology

In this way, one is that under the action of the self-weight of the steel cage, the grouting conduit and the pile end grouting valve are easily damaged; the other is that the verticality of the steel cage in the pile body and the protective layer of the pile body are not easy to control; For cast-in-place piles formed with mud retaining walls, when the holes are formed, due to factors such as secondary or multiple hole cleaning and hole depth measurement errors, over-excavation or hole bottoms are often lower than the design level, and the reinforcement cage is designed according to the pile length. The production length is fixed. When the reinforcement cage is lowered to the bottom, the elevation of the cage top will be lower than the design elevation of the pile top. After the protective pile head is chiseled later, it will be found that the length of the anchor bars reserved for the reinforcement cage is insufficient, and in serious cases, the reinforcement bars cannot even be seen. , causing a certain quality hidden danger to the project, and it is very troublesome to deal with

If the method of lengthening the reinforcement cage in the early stage of making the reinforcement cage or cutting out the protective pile head and then connecting the long anchor bars in the later stage will inevitably cause waste of manpower and materials, and increase the construction cost

Images