Prestressed concrete filled steel tube tensile tie beam for preventing displacement of cushion caps and construction method

Abstract

The invention discloses a prestressed concrete filled steel tube tensile tie beam for preventing the displacement of cushion caps. The prestressed concrete filled steel tube tensile tie beam is characterized by comprising an outer steel pipe; an inner steel pipe is coaxially arranged in the outer steel pipe; a prestressed bundled steel wire is coaxially arranged in the inner steel pipe; a first geotextile fabric layer is connected onto the inner wall of the inner steel pipe by means of a structural adhesive; a concrete protection layer is poured between the first geotextile fabric layer and the prestressed bundled steel wire; a second geotextile fabric layer is connected onto the outer wall of the inner steel pipe by means of a structural adhesive; a third geotextile fabric layer is connected onto the outer steel pipe by means of a structural adhesive; and a compressive concrete layer used for resisting retractive force generated after the prestressed bundled steel wire is tensioned ispoured between the second geotextile fabric layer and the third geotextile fabric layer. The prestressed concrete filled steel tube tensile tie beam has compression resistance; and through additionalarrangement of the compressive concrete layer outside the inner steel pipe, the compression resistance of the whole tie beam is improved, so that the horizontal displacement of the cushion caps is reduced, and the damage of a pile body is avoided.

Description

technical field [0001] The invention belongs to the technical field of construction, and in particular relates to a prestressed steel pipe concrete tensile tie beam and a method for preventing displacement of caps. Background technique [0002] For building structures with large space requirements, the supporting columns are often inclined at a certain angle to the ground, and the upper structure transmits the force to the cap and pile foundation through the supporting inclined columns. When the pile layout site is limited and the ground bearing capacity is small , a small amount of pile foundations cannot balance the horizontal component force generated by the superstructure and cause relative displacement, which in turn has an adverse effect on the supporting slanted columns and the superstructure. Contents of the invention [0003] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and propose a prestressed steel pipe...

AI Technical Summary

Problems solved by technology

[0002] For building structures with large space requirements, the supporting columns are often inclined at a certain angle to the ground, and the upper structure transmits the force to the cap and pile foundation through the supporting inclined columns. When the pile layout site is limited and the ground bearing capacity is small , a small amount of pile foundations cannot balance the horizontal component force generated by the superstructure and cause relative displacement, which will adversely affect the supporting slanted columns and the superstructure

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