Core-grouted static pressure anchor rod pile

Abstract

The invention relates to a core-grouted static pressure anchor rod pile forming device, which comprises a standard pile section and a bottom pile section, wherein a hard plastic pipe is embedded in the center of the cross section of the standard pile section; the bottom end of the hard plastic pipe is connected with a straight-through hollow chamber, and the four corners of the top end thereof are respectively provided with an anchor rod hole; the four corners of the bottom end of the standard pile section are respectively provided with a connecting hole; the connecting holes correspond to the axial positions of the anchor rod holes; a bottom hard plastic pipe is embedded in the center of the cross section of the bottom pile section; the bottom end of the bottom hard plastic pipe is in threaded connection with a hard plastic casing pipe; the four corners of the top surface of the bottom pile section are respectively provide with a bottom anchor rod hole; the bottom anchor rod holes correspond to the axial positions of the anchor rod holes; reinforcing steel bars the upper parts of which are provided with nuts are anchored into the bottom anchor rod holes; the nuts and the connecting holes are configured; a plurality of lower outlet pipes are communicated in the circumferential direction of the hard plastic casing pipe; and a plurality of upper outlet pipes are communicated in the circumferential direction of the straight-through hollow chamber. The invention has the advantages that firstly, the value of the pile bearing capacity can be increased, and thereby, the number of piles can be decreased so as to reduce construction cost, and the quality is reliable; secondly, the influence of compaction soil on adjacent buildings can be reduced so as to protect the surrounding construction environment.

Description

technical field [0001] The patent of the present invention relates to a pile foundation of civil construction engineering, in particular to a pile core grouting static pressure anchor pile pile forming device with high pile foundation engineering quality and low engineering cost. It is suitable for foundation reinforcement projects such as underpinning of existing building foundations, building layers, building tilting, deviation correction, building anti-sinking, etc.; it can also be used for supplementary piles of pile foundation projects and static analysis of composite pile foundation design and construction for reverse construction. The anchor pile foundation is pressed, and the anchor pile core is grouted, so that the bearing capacity of the pile is greatly improved. Background technique [0002] The static pressure anchor pile foundation in the existing civil engineering engineering is a commonly used pile type with reliable quality, and its relevant national professi...

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Problems solved by technology

[0002] The static pressure anchor pile foundation in the existing civil engineering engineering is a commonly used pile type with reliable quality, and its relevant national professional technical regulations are YBJ227-91 technical regulations for anchor static pressure piles; it is suitable for foundation reinforcement engineering and Engineering pile supplement; yet, it is not to adopt the pile core grouting device, the engineering of the said anchor static pressure pile has not been effectively brought into play because of the bearing capacity value of the pile so that the engineering cost is expensive; because the said bearing capacity value has not been effectively brought into play, The design pile density has to be too high, and because the piles pass through the soil layer and squeeze the soil in the saturated soft soil layer, it has a great impact on adjacent buildings and underground pipelines, so its application in construction projects is restricted

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