A distributed grouting system for cast-in-place piles

Abstract

The invention discloses a distributed grouting system for cast-in-place piles, and relates to the technical field of post-grouting for pile foundations. The distributed grouting system for cast-in-place piles includes: a grouting pipe, a tee pipe, a side grouting head, an adapter, a lower grouting head, and a grouting operation head; one end of the adapter and the bottom of the grouting pipe are threaded connection, the other end of the adapter is threadedly connected with the lower grouting head, the grouting pipe is threaded with the side grouting head through a three-way pipe, and the grouting operation head is set in the grouting pipe. The grouting operation head is provided with a side grouting port. The distributed grouting system for cast-in-place piles of the present invention is suitable for grouting construction after bored piles, and realizes the reinforcement treatment of pile ends and pile side soils at different depths at the same time in one grouting pipe, combined with the lifting and lowering of the grouting head It can effectively improve the uniformity of grouting at different positions of the pile foundation and carry out differentiated grouting at different depths, which can significantly improve the bearing capacity of the pile foundation.

Description

A distributed grouting system for cast-in-place piles technical field [0001] The present invention relates to the technical field of post grouting of pile foundations, in particular to a distributed grouting system for cast-in-place piles. Background technique [0002] The pile foundation is a widely used deep foundation, which has the characteristics of high bearing capacity and low deformation compared to the shallow foundation. pile There are various types of foundations, which can be divided into bored piles and driven piles according to the construction method. Among them, the bored piles can be constructed in different forms. It is widely used in large-scale building foundations to form large-diameter, long-pile-length and other large-scale pile foundations. For large diameter long cast-in-place piles, pile foundation construction It will inevitably have some adverse effects, such as hole bottom sediment, hole wall softening and other phenomena, which will greatl...

AI Technical Summary

Problems solved by technology

[0003] Pile foundation post-grouting is an important method to deal with the problems of sediment and hole wall softening caused by the construction of cast-in-place piles. A large number of engineering practices have been carried out, but there are still some problems in the current application technology: pile end grouting of pile foundation and pile Side grouting generally requires a separate grouting pipe, which leads to complex grouting pipelines in the reinforcement cage; pile side grouting is realized by pressing the grout into the top of the grouting pipe, and it is impossible to accurately grout the pile side soil at a certain depth. Moreover, the current method cannot ensure that the pile side grouting is evenly distributed along the pile length, let alone realize the controllable differential grouting construction; grouting pipes and grouting heads are customized according to the pile foundation, which involves complex on-site construction and affects the project schedule

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