1And the principle of undisturbed earth taking and pressing grouting pile
Undisturbed earth taking and pressurized concrete pile technology.It is a new technology of reinforced concrete cast-in-place pile. The technology inherits the advantages of long auger drilling pile . Firstly, the auger drill is used to drill to the bottom of the pile, and the auger drill is buried in the pile hole to be formed into the pile. Then the flow concrete is injected continuously from the bottom of the hole to the hole through the hollow pipe of the drill tool , forming plain concrete pile, and using the vertical transport of spiral blades . Take out the original soil in the pile hole , after removing residual soil and floating slurry from pile top, Insert the whole steel cage into the concrete pile . And the concrete in the hole is vibrated , forming a pile balance without mud shell reinforced concrete cast-in-place pile.
2And the advantages of undisturbed soil taking and pressure irrigation pile
(1(no pollution slurry discharge, crown soil out of the original state, no pollution;
(2) Pile side without mud skin.The pile body is directly and closely in contact with the soil, and the pile side friction is increased 30%The above;
(3) no shrinkage, hole collapse, pile bottom no sediment;
(4) The concrete of pile body is dense, and the pressure poured concrete is vibrated. The strength of concrete is improved and the contact with soil is closer.
(5) pile perpendicularity,Steel cage positioning, etcThe construction of the Precision greatlyTo improve;
(6High degree of mechanical automation, the construction site clean and civilized.Reduce the labor intensity of workers;
(7Compared with the traditional rotary mud wall cobalt hole pile, the pile formation speed is increased6times ~8 times. Reduce construction costs10%~20%, improve the pile quality . Eliminate mud treatment cost, save electricity60%, water saving100% .
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