Construction method of deep and thick soft soil foundation bed bridge abutment

Abstract

The invention discloses a construction method of a deep and thick soft soil foundation bed bridge abutment. The method comprises steps as follows: 1) forming a bridge abutment land construction area; 2) performing primary soft foundation treatment-vacuum water covering and pre-pressing treatment on the bridge abutment land construction area; 3) performing bridge abutment pile foundation construction and bearing platform construction; 4) performing secondary soft foundation treatment-composite foundation treatment on the bridge abutment land construction area; 5) backfilling the area behind the bridge abutment with a filler; and 6) completing the construction of a bridge abutment concrete structure. According to the construction method, due to the secondary soft foundation treatment, post-construction settlement of a road behind the bridge abutment and settlement differences between the road and a bridge abutment structure are reduced, and the phenomenon that a vehicle bumps at a bridge head can be prevented. The construction method of the deep and thick soft soil foundation bed bridge abutment is simple, convenient and feasible, high in efficiency, safe and reliable, and can control the project quality conveniently and save labor power, material resources and financial resources. The construction method is applicable to an area with a low foundation bearing capacity.

Description

technical field [0001] The invention relates to an abutment construction method, in particular to an abutment construction method on a deep soft soil foundation. Background technique [0002] Soft soil is extremely harmful to the foundation. If it is not treated or handled properly, it will cause the foundation to be unstable, cause the structure to settle excessively or unevenly, and cause damage to the structure to varying degrees or even be completely scrapped. Fill the abutment for preloading, and when building the embankment, fill the soil higher than the design level in advance, and widen the width of the filling to accelerate the consolidation and sinking of the foundation, and then excavate the overfilled part later. The method of preloading or overloading preloading is simple and easy to implement, but it takes a long time for consolidation, and the road at the bridge connecting slope will have a large post-construction settlement, which will have a significant diff...

AI Technical Summary

Problems solved by technology

[0002] Soft soil is extremely harmful to the foundation. If it is not treated or handled improperly, it will cause the foundation to become unstable, cause the structure to settle excessively or unevenly, and cause damage to the structure to varying degrees or even be completely scrapped.

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