Method for additionally arranging piles on existing bridge pile foundations

Abstract

The invention discloses a method for additionally arranging piles on existing bridge pile foundations. An existing bridge is a double-column bridge, transverse connection adopts a collar beam, two pile foundations are symmetrically and additionally arranged on the two sides of an original pile foundation collar beam, and the two pile foundations and original pile foundations form a rhombic symmetrical mode. The diameter of the additionally-arranged piles is the same as that of the original pile foundations, the concrete mark number and pile foundation steel bars of the additionally-arranged pile foundations are the same as those of the original pile foundations, and the length of the pile foundations is determined according to actual computation. The spacing distance between the two additionally-arranged pile foundations is not smaller than three times of the pile diameter, and the spacing distance between the two additionally-arranged pile foundations and the original bridge pile foundations is also not smaller than three times of the pile diameter. The way of additionally arranging the piles on the existing bridge pile foundations has the requirement that the distance between theouter side of each pile foundation and the edge of a bearing platform is not smaller than 0.3 of the pile foundation on the rhombic bearing platform obtained after the original collar beam is enlarged. According to the feasible method for additionally arranging the piles on the existing bridge pile foundations, the problem that the length of built bridge pile foundations is not enough can be effectively solved, and the method can be applied to additional arrangement of the piles on existing bridges to ensure the bridge safety.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and particularly relates to a method for adding piles to existing bridge pile foundations, which is mainly used for adding piles to pile foundations where the substructure is a pile-column bridge pier. Background technique [0002] After the bored piles are poured into piles, occasionally the pile length is less than the design length, or the actual geology and the design calculation geology change, resulting in insufficient length of bridge pile foundation, which cannot meet the load-bearing requirements of the bridge. After the bridge is built, dismantling the bridge because the length of the pile foundation is not enough will cause great waste. Therefore, it is necessary to adopt a practical bridge reinforcement method to reinforce the existing bridge pile length. The existing pile foundation reinforcement methods mostly use the original ground grouting to reinforce the soil to incr...

AI Technical Summary

Problems solved by technology

[0002] After the bored piles are poured into piles, occasionally the pile length is less than the design length, or the actual geology and the design calculation geology change, resulting in insufficient bridge pile foundation length, which cannot meet the bridge bearing requirements

After the bridge is built, dismantling the bridge because the length of the pile foundation is not enough will cause great waste. Therefore, it is necessary to adopt a feasible bridge reinforcement method to strengthen the existing bridge piles with insufficient length.

The existing pile foundation reinforcement methods mostly use the original ground grouting to reinforce the soil to increase the friction of the soil around the pile, but it is difficult to quantify the effect of this method on the bearing capacity of the bridge pile foundation.

Images