Piled beam type bridge integral structure and construction technique and machine

Abstract

The invention relates to a piled beam type bridge integral structure and a construction technique and machine. A piled beam type bridge is composed of a lower structure body and an upper structure body mounted on the upper portion of the lower structure body and is characterized in that the lower structure body is composed of a cover beam, oblique cylinder hole piles and expanding foundations which are of an integrally-formed structure, and the oblique cylinder hole piles are each of a hollow cylindrical structure. The piled beam type bridge integral structure and the construction technique and machine have the advantages that the construction speed is quick, operation efficiency is high, engineering manufacturing cost is low, and the engineering quality is high.

Description

technical field [0001] The invention belongs to the technical field of road bridges and road bridge construction equipment, and in particular relates to a pile-beam bridge overall structure, construction technology and construction machinery. Background technique [0002] Recently, China's infrastructure construction has accelerated, especially in road and bridge construction, which has achieved world-renowned achievements. Pile foundations and beam-slab bridges are the main structural forms of large, medium and small bridges in China. Except for a few super-large bridges, more than 80% of China's The large, medium and small bridges in the country are all pile foundation and beam-slab bridges. With the popularization and application of bored pile technology, the construction technology of pile foundation and beam-slab bridges is becoming more and more mature, but the following problems still exist: (1) Too many construction links , causing the overall service life of the bri...

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Problems solved by technology

[0002] Recently, China's infrastructure construction has accelerated, especially in road and bridge construction, which has achieved world-renowned achievements. Pile foundations and beam-slab bridges are the main structural forms of large, medium and small bridges in China. Except for a few super-large bridges, more than 80% of China's The large, medium and small bridges in the country are all pile foundation and beam-slab bridges. With the popularization and application of bored pile technology, the construction technology of pile foundation and beam-slab bridges is becoming more and more mature, but the following problems still exist: (1) Too many construction links , causing the overall service life of the bridge to decrease. The pile foundation and beam-slab bridge are divided into superstructure and substructure, and then the superstructure and substructure form a stressed whole through the support. The pile foundation, column and cover beam of the substructure are constructed in three times. Increased quality hazards, especially in the upper structure, first prefabricated monolithic beams in pieces, hoisted in place, then connected horizontally, poured joints, and then paved the bridge deck. So many links can easily cause the horizontal connection of monolithic beams to fail. The upper structure of the bridge deck will be damaged prematurely due to the stress on the veneer during use; (2) The number of bored piles is large, the cost is high, and the static load is too large. The pile diameter of hole piles needs to be designed to be very large and the pile length is very long, which greatly increases the construction cost. At the same time, due to too many piles, the static load of the bridge is too large, and the dynamic bearing capacity is limited; (3) the straight pile bears Ordinary pile foundations with limited load use straight piles, which rely entirely on frictional force (except for rock-socketed piles), and cannot rely on the bearing capacity of the foundation to share the load; (4) The construction period is long and the construction cost is high. There are too many bridge construction links, resulting in long construction period and high construction cost

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