Construction device for sealing and filling headspace cavity of foundation pile of composite pile

Abstract

The invention discloses a construction device for sealing and filling the headspace cavity of the foundation pile of a composite pile. When secondary pouring is carried out on the pile top, a novel grouting bottom pipe is firmly welded with a main reinforcement and is poured in a secondary pile top, and the pipe orifice is inserted in the cavity of the pile top; the novel grouting bottom pipe at the external part of the foundation pile is embedded in foundation soil shallow stratum and is led to the ground from the side face of a raft plate. Compared with the traditional grouting method, the construction device can economically and reasonably realize the grouting and sealing operation on the cavity of the pile top, ensures that the integrality of the raft plate is not destroyed and that rebar binding operation is smoothly carried out, reduces the engineering cost and improves the working efficiency.

Description

technical field [0001] The invention relates to a construction device for sealing and filling the pile top cavity of a composite pile foundation, in particular to a construction device for sealing and filling the pile top cavity of a composite pile foundation with elastic bearings arranged on the pile top. Background technique [0002] With the vigorous promotion of infrastructure construction in our country, pile foundation, an ancient foundation form, has been widely used and developed unprecedentedly. As one of the main manifestations of pile foundations, piled raft foundations have also developed rapidly in recent years. Pile raft foundations, as the name implies, refer to the foundation form in which piles and caps bear the load of the upper structure together. It has good foundation integrity and high bending rigidity. , wide adaptability and easy to realize pile-soil interaction and other advantages. [0003] The direct rigid connection between piles and rafts in con...

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Problems solved by technology

[0013] The present invention does not need to drill holes on the cover plate by setting the downward type grouting bottom pipe, which saves the cost and ensures the integrity of the cover plate; in addition, the position of the grouting bottom pipe changes without contact with the inside of the raft. The conflicts in the installation of the reinforced steel structure not only make it easier to advance the project, but also solve the problem of uneven arrangement; again, the bottom pipe of the grouting is no longer located on the raft, and the groundwater in the pipe will no longer be generated before the grouting is closed It will continue to flow upwards, causing serious water accumulation in the basement, which is convenient for subsequent construction; finally, the filling effect is relatively stable

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