Truss supporting and reinforcing method for pile type bridge abutment

Abstract

The invention belongs to the technical field of bridge building and construction and discloses a truss supporting and reinforcing method for a pile type bridge abutment. The pile type bridge abutment comprises bridge abutment foundation piles and an abutment capping arranged on the bridge abutment foundation piles. The truss supporting and reinforcing method comprises the following steps: a, digging a revetment in front of the abutment, forming grooves, and arranging new foundation piles in the grooves; b, connecting the upper parts of all of the new foundation piles by a transverse connecting beam; c, constructing so as to form diagonally braced skeletons and longitudinal connecting beam skeletons; d, forming longitudinal connecting beams and diagonal bracings; and e, filling the grooves formed in the step a with soil so as to fill notches of the revetments in front of the abutment. By combining the structural characteristics of the pile type bridge abutment, the problems that the bearing capability of the pile type bridge abutment is low, the push resisting rigidity of the bridge abutment is small, the bridge abutment easily tilts towards the river center side and the piles (pillars) easily crack are solved. When the bearing capability of the foundation piles is improved, the push resisting rigidity of the bridge abutment is greatly enhanced, and the stability of the bridge abutment is improved.

Description

technical field [0001] The invention belongs to the technical field of bridge road construction, and more specifically relates to a pile-column abutment truss support and reinforcement method. Background technique [0002] Pile-type abutments are widely used in practical engineering. The remarkable features of this type of abutment are simple structure, clear force transmission path, and convenient construction, without the need for large filling and excavation of embankments. However, it has also been found in practical applications that due to the low thrust stiffness of this type of abutment, the earth pressure behind the abutment often causes the abutment to lean forward, resulting in cracking of the pile (or column) body, extrusion and failure of the bridge deck expansion joints, and Once the bearing capacity of foundation piles is reduced, it is relatively difficult to reinforce them. This phenomenon is particularly prominent in the high-fill road-bridge junction, whi...

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a pile-type abutment truss support reinforcement method, wherein by combining the structural characteristics of the pile-type abutment itself, the key process steps of its abutment reinforcement and The research and design of the operation means solved the problem of low bearing capacity of the pile-column (or pile-connected cap-beam) abutment, small abutment thrust stiffness, prone abutment to the river center side and pile (or column) body cracking The problem is that while improving the bearing capacity of the foundation piles, the thrust stiffness of the abutment is greatly enhanced, and the stability of the abutment is improved. At the same time, it has the advantages of simple construction and low cost

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