Method for determining the truncated position of steel bars in bridge pile foundations

Abstract

The invention discloses a method for determining the truncated position of reinforcing bars of bridge pile foundation. The method comprises the following steps: 1) according to the existing superstructure of bridge pile and the parameters of bridge pile, determining the attribute value of bridge pile; 2) determining the second truncation position according to the attribute value of the bridge pileobtained in the step 1); 3) determining the first truncation position according to the internal force distribution law of the pile body. The invention studies the change curve of the pile body internal force with depth when the pile foundation is forced, Combined with the existing pile foundation design specifications, a method to determine the truncated position of steel bars in bridge pile foundation is given. According to this method, the truncated position of steel bars in bridge pile foundation can be determined scientifically and reasonably, so that it can meet the structural stress requirements, and the material consumption can be reduced to the maximum extent, the project investment can be saved, and the economic benefit can be improved.

Description

technical field [0001] The invention relates to bridge pile design technology, in particular to a method for determining the truncation position of a bridge pile foundation steel bar. Background technique [0002] As a main form of deep foundation, pile foundation has outstanding characteristics such as high bearing capacity, good stability, convenient mechanized construction, small and uniform settlement, etc. It has a long history and is widely used. After the 1950s, pile foundations have been widely used and developed in my country's highways, railway bridges, port terminals, housing construction, and heavy factory buildings. my country has begun to generally use pile foundations in major projects, especially bridge construction. [0003] With the deepening of bridge pile foundation design and the improvement of construction technology, there are mainly two longitudinal reinforcement layout methods for pile foundation: according to the maximum bending moment, the reinforc...

AI Technical Summary

Problems solved by technology

Through the investigation of the pile foundation design process in the design institute, it is found that the truncation position is determined based on relevant experience, and there is no specific calculation of the truncation position of the pile foundation reinforcement, so the given truncation position may not guarantee the pile foundation after the reinforcement is cut off. To meet the force requirements; many design institutes to meet the structural force requirements, the determined truncation position is too conservative, resulting in waste of materials and increased project investment

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