Bearing rope anchor of cable crane and its construction method

Abstract

The invention provides a cable crane bearing rope ground anchor, comprising a pre-stress rock anchor and a reinforced concrete anchor wall, wherein, the reinforced concrete anchor wall is poured on the rock slope surface at two banks; the pre-stress rock anchor comprises an anchoring section, a free section and an anchor wall anchoring section; the anchoring section is anchored in the rock body; the anchor wall anchoring section is anchored in the anchor wall; the free section is arranged at the middle part; the construction method of the cable crane bearing rope ground anchor comprises the steps as follows: (1) the central position of the rock anchor is measured to set out and the position of the anchor wall is also set out by pulling a line; (2) the slope surface of the ground anchor position is excavated, the anchor wall rebar is installed, meanwhile, the rock anchor hole is remained, and the anchor wall concrete is poured by layer; (3) when the anchor wall concrete achieves more than 85% of the design strength, the construction of the hole-forming rock anchor is carried out according to the remained hole on the anchor wall; (4) the anchor cable is arranged in the formed rock anchor hole; (5) the rock anchor scouring construction is carried out; (6) when the strength of the slurry of the scouring in the rock anchor hole achieves the design tensile strength, the tensioning of the rock anchor is carried out; and (7) after the tensioning is completed, the free section of the anchor cable is grouted or sealed for grouting.

Description

technical field [0001] The invention belongs to the technical field of suspension bridge construction, and in particular relates to a ground anchor structure of a cable suspension load-bearing rope and a construction method of the ground anchor. Background technique [0002] At present, truss-type stiffened beams are mostly used in the long-span suspension bridges built in the western mountainous areas; however, the terrain and geological conditions in the mountainous areas are complex, the transportation is inconvenient, and the transportation of large parts is extremely difficult, and the construction site is narrow and the working surface is severely limited, so cable loading cannot be used during construction. The truss-type stiffening beam is erected by the crane, and the construction period of the cantilever method is too long to meet the construction needs. In this case, the use of fast and efficient long-span cable cranes has become the preferred solution for the trus...

AI Technical Summary

Problems solved by technology

[0002] At present, truss-type stiffened beams are mostly used in the long-span suspension bridges built in the western mountainous areas; however, the terrain and geological conditions in the mountainous areas are complex, the transportation is inconvenient, and the transportation of large parts is extremely difficult, and the construction site is narrow and the working surface is severely limited, so cable loading cannot be used during construction. The truss-type stiffened beam is erected by the crane, and the construction period of the suspension method is too long to meet the construction needs. In this case, the use of fast and efficient long-span cable cranes has become the first choice for the suspension bridge truss-type stiffened beam.

However, with the development of large-span suspension bridges in mountainous areas, the span of the cable crane increases accordingly. In order to meet the tension requirements of the load-bearing ropes of the large-span cable crane, it is necessary to set up a huge gravity anchor, so the cost of the cable crane Inevitably increased dramatically, the high cost restricts the development and application of large-span cable cranes

Images