Construction method of pipe-anchor rock for section steel trestle bridge

Abstract

The present invention relates to the technical field of pile foundation construction of shaped steel trestle bridges, and aims to provide a construction method for internally planting pipe anchor rocks of shaped steel trestle bridges. There are several steps such as laying of operation platform, drilling and coring, embedding of concrete steel pipes and erection and welding of section steel. The construction method of the present invention implants concrete steel pipes inside the trestle pipe piles, that is, relies on the shear resistance of the concrete steel pipes anchored into the rock formation to achieve the stability of the external pipe piles, which achieves the effect of "anchor rock", so the cost of materials and equipment is small, and the pipe piles The recovery rate is high, the whole construction method is simple, the operation is convenient, and the construction period is short.

Description

Technical field [0001] The invention relates to the technical field of pile foundation construction of a section steel trestle bridge, and more specifically, to a construction method of an internal planting pipe anchor rock for a section steel trestle bridge. Background technique [0002] Steel trestle bridges are widely used as construction auxiliary temporary structures in the construction of highways and wharves. In particular, many wharves are built around offshore unshielded islands. The nearshore side pile foundations are mostly uncovered rock-socketed piles according to the difference in geological conditions. However, there is no breakwater structure on the outer side of some piers, and the trestle bridge is greatly affected by natural conditions such as wind and waves during the erection process. Surge, bare rock, poor rock surface flatness, large inclination rate, and high rock strength are all factors that restrict the stability of trestle pipe piles. The key factor. ...

AI Technical Summary

Problems solved by technology

The Chinese patent of publication number CN200710300006 discloses a kind of steel pipe concrete pile and steel pipe pile anchorage rock embedding method, specifically insert and beat steel casing earlier, utilize percussion drilling rig to drill again, after percussion drilling rig forms hole, lower steel pipe (for steel pipe The concrete pile should be lowered to the design elevation at the same time, and the underwater concrete should be poured into the steel pipe. After the underwater concrete is turned up to a certain height along the outer wall of the steel pipe and the wall of the drilled hole, the concrete pouring of the whole pile is completed, and the steel protection is pulled out. tube, solidified into piles; its disadvantage is that it is necessary to specially set up steel casings, as well as steel cages, etc., so that the amount of work is large and the period is long

At this stage, there is a lack of an anchor rock construction method that is less difficult and faster for trestle piles

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