Post-grouting construction method for long helical bore grouting pile and its grouting device

Abstract

A long auger hole grouted pile post-grouting processing method and the postposition grouting device, which has the following step: firstly, the postposition grouting device is made; then, the long earth auger is used to drill; the plain concrete is pumped into the hole of the pile; after pouring the concrete on the pile stem, the grouting device is hung up and disposed above the pile stem before the cement is initially set; the hammer of the grouting device is started, and the postposition grouting device is immersed into the pile stem to the design elevation under the action of the exciting force and the leading of the guide member; the hammer is vibrating while being lifted and the hammer is drawn, then the hammer is closed, to set the postposition grouting device in the pile stem; after the pile stem concrete pouring is completed and the cement is finally set, the grouting is processed by the pile toe grouting pipe and the pile side grouting pipe, to make the soil mass in some distance around the pile toe and the pile cycle being reinforced. The invention greatly advances the bearing capacity of pile, reduces the engineering quality hidden danger of the long auger hole grouted pile and the amount of pile compared with the traditional technology, lowers the basic engineering invest.

Description

(1) Technical field [0001] The invention relates to a construction method for pile foundation treatment in construction engineering and a grouting device thereof. (two), background technology [0002] The long auger bored pile is a new pile foundation construction technology developed in recent years. Its construction method is to first drill a hole with a long auger drill, and then pump concrete in the hole to form a pile at one time. The hole is formed and poured in one go, which is convenient for construction. , No mud pollution, low noise, high efficiency and low cost. However, due to the void soil often exists at the pile tip and pile side, the bearing capacity of the long auger bored grouting pile is reduced. Therefore, the settlement of the pile foundation can be further reduced, the investment in the pile foundation project can be saved, and the stable bearing capacity of the pile can be ensured. The scope of application of the type is a technical problem that the s...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of grouting treatment construction method and post-installation grouting device of a kind of long helical borehole press-grouting pile, solve the problem of solidifying pile tip, pile side empty soil, improving single pile bearing capacity; Also solve further Problems of Improving the Quality Stability of Long Spiral Bored Pile and Increasing the Stiffness of the Foundation

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