Pile tip for belled pile and carrier pile construction

Abstract

The invention relates to a pile tip for belled pile and carrier pile construction. The pile tip is characterized in that a one-way valve is arranged, an expanded foot and a carrier are conveniently and quickly formed at a pile (hole) bottom through squeezed expansion by means of multiple times of reverse insertion during foundation treatment construction. The expanded foot and the carrier are formed through squeezed expansion construction by means of the pile tip under the condition that a karst region or a bed-rock-like surface rises and falls, and the bearing capacity of the pile tip can bereliably guaranteed. The one-way valve is arranged on the pile tip body, by using the action of gravity, the device can conveniently and quickly control a valve to be automatically switched on when apile pipe is pulled upwards, and a pile body material flows out of the pile pipe. When the pile pipe is pressed downward, the valve is automatically switched off, and the pile body material cannot flow back into the pile pipe and is subjected to squeezed expansion to form the expanded foot and the carrier. The one-way valve on the pile tip can be conveniently switched on and off according to construction requirements and is convenient to use and simple in structure, and the quality of the expanded foot and the carrier formed through squeezed expansion is easy to guarantee.

Description

technical field [0001] The invention relates to a pile tip used for the construction of a bottom-expanding pile carrier pile. The structure is provided with a one-way valve, which can be inserted conveniently and quickly at the bottom of the pile (hole) through multiple reverse insertions during foundation treatment and construction. Expanding to form an expanding head and a carrier, it is convenient to carry out rock surface pile construction in karst areas or similar bedrock surfaces with large undulations. Background technique [0002] At present, there is no one-way valve on the known pile tip structure. During reverse insertion and expansion construction, the pile body material and soil, water, mud, etc. outside the pile pipe (or long auger drill pipe) will be squeezed back into the pile. In the pipe, it affects the forming quality and extrusion effect of the pile body, and limits the engineering application of the reverse insertion extrusion construction method. Cont...

AI Technical Summary

Problems solved by technology

[0002] At present, there is no one-way valve on the known pile tip structure. During reverse insertion and expansion construction, the pile body material and soil, water, mud, etc. outside the pile pipe (or long auger drill pipe) will be squeezed back into the pile. In the pipe, it affects the forming quality and extrusion effect of the pile body, and limits the engineering application of the reverse insertion extrusion construction method

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