Bridge abutment liquefied foundation reinforcing method and reinforcing expansion body

Abstract

The invention discloses a reinforcing expansion body which comprises a shell and expansion filler. The shell is made of a metal piece which is in a shape of a fan ordinarily, rectangular sawteeth are arranged on two radius edges of the fan, after the metal sheet is rolled into a cone, the rectangular sawteeth on the two radius edges of the fan are meshed with each other, and meshed positions are fixed by means of mechanical suturing to finally form the conical shell. The expansion filler is filled in an inner cavity of the shell and compacted, and multiple through holes are uniformly distributed on the surface of the shell to form water drainage holes. The invention further discloses a bridge abutment liquefied foundation reinforcing method based on the reinforcing expansion body. The reinforcing expansion body and the bridge abutment liquefied foundation reinforcing method have the advantages that liquefied foundations of large buildings with bridge abutments and the like can be reinforced, construction amount is small, cost is low, and effect can be quickly achieved.

Description

technical field [0001] The invention relates to a liquefied foundation reinforcement technology, in particular to a liquefied foundation reinforcement method of an abutment and a reinforcement expansion body. Background technique [0002] During the seismic activity, the action of ground motion will easily lead to liquefaction of the foundation soil of the abutment, the effective stress inside the foundation soil will be reduced, and the bearing capacity of the foundation will be significantly reduced, resulting in uneven settlement of the foundation of the abutment and the foundation structure of the lower part of the abutment. Displacement, cracking, and even damage occur, and foundation liquefaction is one of the main manifestations of bridge earthquake damage. [0003] In the prior art, there are many means of strengthening the liquefied foundation, mainly including gravel piles, compaction piles, sand piles, lime piles, dynamic compaction, etc. These methods make th...

AI Technical Summary

Problems solved by technology

However, the aforementioned methods are only applicable to the treatment of liquefied foundations in areas without large bridges or buildings, and are not suitable for the reinforcement of liquefied foundations in areas with large structures such as bridge abutment foundations, and the aforementioned methods still exist. Defects of large engineering volume and high construction cost

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