Grouting pipe construction method for post grouting of cast-in-place pile

Abstract

The invention discloses a grouting pipe construction method for post grouting of a cast-in-place pile. The grouting pipe construction method comprises the steps of manufacturing pile side grouting hoses, and forming side grout outlet holes in the preset positions of the manufactured pile side grouting hoses; installing a plurality of pile side grouting hoses on the pile side along the peripheral side of a reinforcement cage in a surrounding mode, so that the sides, with the side grout outlet holes, of the pile side grouting hoses are arranged in a protruding mode away from the reinforcement cage, outer protruding parts are formed on the outer sides of the pile side grouting hoses, and inner concave parts are formed on the inner sides of the pile side grouting hoses; installing a plurality of pile side grouting pipes in the preset position of the reinforcement cage, and communicating grout outlet holes in the bottoms of the pile side grouting pipes with pipe bodies of the pile side grouting hoses; installing a pile bottom grouting pipe at the bottom of the reinforcement cage, so that the bottom of the pile bottom grouting pipe extends out of the bottom of the reinforcement cage by a preset length; and connecting the pile side grouting pipes and the pile bottom grouting pipe with a grouting device. According to the grouting pipe construction method, the situation that the grout outlet holes of the grouting pipes are completely wrapped by concrete can be avoided, follow-up grouting is in a smooth state, and the construction quality of a pile foundation is improved.

Description

technical field [0001] The invention relates to the field of post-grouting of cast-in-situ piles, in particular to a grouting pipe construction method for post-grouting of cast-in-place piles. Background technique [0002] Pile foundation is a very important supporting structure in construction engineering. For example, in the construction process of some viaducts, in order to improve the bearing capacity of the pile body, the pile foundation generally uses bored piles and pre-embedded grouting pipes for post-grouting. [0003] At present, the traditional post-grouting construction method generally needs to install grouting pipes at the predetermined positions of the pile side and the pile bottom. The cage is circled so that the grouting steel wire hose is tightly bound to the steel cage, while the bottom of the conventional pile bottom grouting pipe is generally flush with the bottom of the steel cage when it is installed. [0004] In view of the current related technologi...

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Problems solved by technology

[0004] In view of the current related technologies, the inventors found that during the process of pouring concrete into the pile foundation, the grout holes at the bottom of the pile bottom grouting pipe and the grouting holes of the pile side grouting pipe are easily completely covered by the pile body concrete. If the plug is not timely, the subsequent grouting pressure will be too high, and even the grouting hole will not be opened, so that the designed grouting volume will not be reached, which will directly affect the improvement of the bearing capacity of the pile foundation, which needs to be improved

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