Construction method for transverse beam hoisting in-position of arch first and beam late tied-arch bridge

Abstract

The invention discloses a construction method for the hoisting and emplacement of crossbeams of an arch-first and beam-later tied arch bridge, comprising the steps as follows: a. a pulley block (4) is serially wound; b. a guide wheel is fixed; c. a hoist is installed; d. a travelling rope (6) coils the guide wheel and then is connected with the hoist; e. the steps of a-d are repeated; f. the crossbeam (105) is transported below the hoisting point; g. a bundled wire rope (9) is fixed with the crossbeam (105); h. the hoist is started and the crossbeam (105) is hoisted and emplaced; i. the crossbeam (105) is fixed; j. the bundled wire rope (9) is disconnected with the crossbeam (105); k. the pulley block (4) is removed; l. the steps of f-i are repeated and another crossbeam (105) is hoisted and emplaced; and m. the steps of j-i are repeated for a plurality of times and all the crossbeams (105) are hoisted and emplaced. The construction method for the hoisting and emplacement of the crossbeams of the arch-first and beam-later tied arch bridge has low construction cost, short construction period, small interference due to environment factor, and small hidden safety trouble.

Description

technical field [0001] The invention relates to a civil engineering construction method, in particular to a construction method in which the beams of an arch bridge tied with beams are hoisted in place after arching first. Background technique [0002] Concrete-filled steel tube tied arch bridge has a large market among medium-span bridges because of its beautiful appearance, good economy and short construction period. In order to reduce the amount of formwork and support for cast-in-place beams and bridge decks, reduce the impact of the pouring construction of beams and bridge decks on river navigation, and ensure the construction quality of beams and bridge decks, the following " "Arch first, then beam" construction method: [0003] First, two parallel arch ribs 101 on both sides of the width direction of the bridge are manufactured on site, and each arch rib 101 is generally composed of steel tube concrete or truss type steel tube concrete. The steel arch structure was ...

AI Technical Summary

Problems solved by technology

[0007] The above construction methods have the following defects: the prefabricated beam has a large section size and a large span, so the weight is very heavy, and the lifting load of the sling is also large, and the sling is a flexible cable, which has a certain sag under the action of gravity , the greater the lifting weight, the greater the sag

Therefore, large-scale cable towers and cables are required. In this way, more personnel and equipment are required for installation and use, and a larger construction site is required, so the construction cost is high and the construction period is long.

Moreover, the construction process of the equipment is greatly disturbed by factors such as the environment (such as wind force and rainfall), so there are potential safety hazards

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