Press-stressed anchor cable assembly type steel waist rail and construction method thereof

Abstract

The invention discloses a pre-stressed anchor cable assembly type steel waist rail. The pre-stressed anchor cable assembly type steel waist rail comprises a plurality of triangular steel inclined cushions which are fixedly arranged on a support pile, a steel waist rail body which is welded on inclined surfaces of the triangular steel inclined cushions and an anchor cable for keeping stability of the support pile, wherein the steel waist rail body comprises two pieces of channel steel which are the same, are symmetrical back to back and are arranged in a spaced mode, a plurality of connecting batten plates for connecting the two pieces of channel steel and a plurality of pressure-bearing plates which are symmetrically welded on left and right side surfaces of the two pieces of the channel steel; the connecting batten plates are arranged in the spaced mode; the two ends of each connecting batten plate are separately welded on the side surfaces of two pieces of channel steel; through holes are formed in positions, different from a welding area, on middle regions of the pressure-bearing plates; the anchor cable comprises an anchorage device, an anchor cable body and an anchor root, wherein the anchorage device is blocked outside the pressure-bearing plates; the anchor cable body sequentially passes through the through holes, the triangular steel inclined cushions and the support pile; and the anchor root at the tail end is fixedly arranged on a nearby rock body.

Description

technical field [0001] The invention relates to the field of foundation pit pile anchor support, in particular to a prestressed anchor cable assembled steel waist beam and a construction method thereof. Background technique [0002] "Supporting piles + prestressed" anchor cables have been widely used as a common form of support structure in deep foundation pits. When multiple rows of prestressed anchor Except for the crown beam of the protection pile, other rows of prestressed anchor cables need to be combined with the support pile through the waist beam to form a support structure. [0003] At present, the waist beams of prestressed anchor cable support structures are generally cast-in-place reinforced concrete waist beams, which have good cross-sectional stability, high bending stiffness, and good anti-corrosion performance. At the same time, due to the large section size, it takes up a lot of space in the foundation pit, which limits the expansion space of the undergroun...

AI Technical Summary

Problems solved by technology

[0003] At present, the waist beams of prestressed anchor cable support structures are generally cast-in-place reinforced concrete waist beams, which have good cross-sectional stability, high bending stiffness, and good anti-corrosion performance. At the same time, due to the large size of the section, it takes up a lot of space in the foundation pit, which limits the expansion space of the underground structure, and is also not conducive to the construction of the exterior wall of the underground structure in the later stage; in addition, it is difficult to remove the reinforced concrete in the later stage, and there is noise and dust pollution to the environment

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