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Filling pile construction method for machine drill end oversize reaming and its special apparatus

A construction method and technology of cast-in-situ piles, which are applied in sheet pile walls, foundation structure engineering, construction, etc., can solve the problems that the size of the pile bottom is difficult to ensure, and the diameter of the pile bottom cannot be increased, so as to improve the load bearing capacity and the overall earthquake resistance Ability and the effect of shortening the construction period

Inactive Publication Date: 2008-02-27
中国安能集团第三工程局有限公司
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  • Description
  • Claims
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Problems solved by technology

It is also difficult to guarantee the size of the pile bottom, and it is not possible to add a reinforcement cage to form a large-diameter pile bottom of reinforced concrete

Method used

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  • Filling pile construction method for machine drill end oversize reaming and its special apparatus
  • Filling pile construction method for machine drill end oversize reaming and its special apparatus
  • Filling pile construction method for machine drill end oversize reaming and its special apparatus

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Embodiment Construction

[0056] A method for constructing cast-in-situ piles with super-diameter reaming at the ends of machine drills, characterized in that: the following steps are carried out:

[0057]a) Use conventional pile drilling rigs to construct to the predetermined reaming depth;

[0058] b) Replace the reaming drill bit to carry out the construction of the reaming section, so that the bottom of the pile forms a cylinder or cone with a diameter of 2 to 4 times the diameter of the pile body;

[0059] c) Use gravity or external force to lower the reinforcement cage;

[0060] d) Pouring concrete to form cast-in-place piles.

[0061] The detailed construction steps of the present invention are as follows:

[0062] The construction process is leveling the site → laying the pile position line and re-testing → drilling rig in place → correcting the centering and sag of the drill pipe → drilling → slag removal → soil removal → placing the steel hole protection pipe at the orifice → measuring the ...

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Abstract

The present invention discloses construction process and special appliances for forming filling pile with reamed end. The construction process includes the following steps: boring to set depth with conventional pile work borer; reaming with reaming bit to form cylinder or frustum in the pile bottom; setting the reinforcing cage gravitationally or by means of external force; and pouring concrete to form the filling pile. The special appliances include one reaming bit capable of forming oversized pouring end, and one reinforcing cage capable of being drawn in and drawn off. The filling pile with reamed end has great stressed area in the pile bottom, great bearing capacity and high anti-seismic capacity.

Description

technical field [0001] The invention relates to a construction method of reinforced concrete cast-in-place piles, in particular to a construction method and special tools for cast-in-situ piles with large-diameter pile foundations, and especially relates to the geological conditions of high-rise and ultra-high-rise civil construction projects with non-bedrock as the bearing layer Under the premise of increasing the load-bearing area at the bottom of the pile foundation, the single pile bearing capacity is doubled without changing the pile diameter and pile depth, and the construction technology and special equipment for improving the overall earthquake resistance. Background technique [0002] At present, under the geological conditions where non-bedrock is the bearing layer, in order to ensure that the bearing capacity of the foundation is not exceeded in high-rise and super-high-rise civil construction projects with extremely large upper loads, the pile diameter and the len...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/44
Inventor 刘俊君詹登民张仕超
Owner 中国安能集团第三工程局有限公司
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