Bridge-head bumping processing method for relatively deep mud soft soil foundation behind abutment

Abstract

The invention discloses a bridge-head bumping processing method for a relatively deep mud soft soil foundation behind an abutment. The bridge-head bumping processing method comprises a step of firstly arranging a bridge-head transition slab at a position behind the abutment and simultaneously performing road structural layer construction on the road below the bridge-head transition slab. The method further comprises the steps of laying a dry jet mixing pile layer below the bridge-head transition slab along the extension direction of a road; and after laying of the dry jet mixing pile layer is finished, laying a graded broken stone unit layer on the pile top of the dry jet mixing pile layer in the length range of the bridge-head transition slab; wherein a plurality of steel-plastic composite geogrid layers are sandwiched in the graded broken stone unit layer; and a cement stable broken stone layer is laid between the top layer of the graded broken stone unit layer and the bridge-head transition slab. The bridge-head bumping processing method has functions of effectively settling a bridge-head settlement problem at the relatively deep mud soft soil foundation behind the abutment, effectively reducing number of times of bridge-head bumping at the head end behind the abutment, preventing bridge-head bumping at the tail end behind the abutment, realizing high comfort and high stability in driving to the pavement behind the abutment, and greatly improving safety on a driving pavement.

Description

technical field [0001] The invention relates to a method for treating a part where a bridge connects with a road, that is, a post-station treatment method, in particular to a treatment method for bridge head jumping on a deep muddy soft soil foundation behind a station. Background technique [0002] The part where the bridge connects with the road, that is, behind the abutment, is often set up with a bridge head to reduce the impact of bridge head jumping. However, due to the constraints of road planning alignment and geological conditions, the backfill is often in muddy soft soil geological conditions, and its backfilling is often difficult to handle in place. After several years of use, the settlement of the bridge head is obvious, and the phenomenon of vehicle jumping at the bridge head is serious, which affects driving comfort and endangers driving safety. [0003] When the soft soil foundation behind the abutment is relatively shallow, conventional subgrade treatment m...

AI Technical Summary

Problems solved by technology

[0007] When the soft ground behind the abutment is muddy soil with a depth of ten meters or even dozens of meters, it is difficult to achieve the design purpose according to the above conventional treatment methods

[0008] In particular, when the muddy soft soil is deep, the road usually uses powder jetting piles for soft soil foundation treatment, but it is often only treated to the end of the lap board

This leads to the occurrence of vehicle jumping at the bridge head at both the head end and the end of the board, which aggravates the occurrence of vehicle jumping at the bridge head

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