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Retaining wall reformation method for column type bridge abutment foreslope

A column-type abutment and front slope technology is applied in the field of the transformation of the front slope of the column-type abutment into a retaining wall, which can solve the problem of lack of relevant research, and achieve the effect of reducing the project cost and shortening the construction period.

Inactive Publication Date: 2014-06-18
李煜科
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no relevant research on the retaining wall of the abutment front slope.

Method used

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  • Retaining wall reformation method for column type bridge abutment foreslope
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  • Retaining wall reformation method for column type bridge abutment foreslope

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Embodiment Construction

[0050] The present invention is described in detail below in conjunction with specific example:

[0051] The present invention is divided into three stages:

[0052] The first stage is the splitting and grouting reinforcement of the abutment fill soil.

[0053] According to the site pouring experiment and stability analysis results (corresponding to the distribution of plastic regions and the position of the sliding surface in the ultimate failure state), the construction area is determined, which is divided into the reinforcement construction area and the reinforcement affected area. The reinforcement construction area is the layout range of the drill holes. The area affected by reinforcement is the range where the grout splits the soil; the details are as follows:

[0054] (1-1) The active earth pressure reinforcement construction area behind the wall is determined based on the plastic area distribution of PEMAG (Ft=1.61) at the limit failure of the full-section excavation, t...

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Abstract

The invention discloses a retaining wall reformation method for a column type bridge abutment foreslope. The method comprises the following steps that 1, before soil filling and excavation are carried out on the bridge abutment foreslope, the position behind a bridge abutment is filled with soil, grouting reinforcement is carried out, and the structure of a space frame is formed in a reinforced area; 2, soil filling and segmented and classified excavation are carried out on the bridge abutment foreslope; 3, anchoring flexible retaining wall construction is carried out in front of the bridge abutment, and underbridge undisturbed soil reinforcement is carried out in front of the bridge abutment after the retaining wall construction. Due to the fact that the side slope is transformed into a retaining wall, a road can be widened, meanwhile, occupied land is reduced, an original roadbed is utilized, engineering cost is lowered, and the construction cycle is shortened; the sleeve valve pipe separation grouting reinforcement roadbed treatment method has the prominent advantages of being free of environmental pollution, slightly influencing surrounding buildings and structures, being simple in construction process and relatively low in price and the like. Due to the fact that the classified excavation sequence is determined, on one hand, side slope deformation can be reduced, and construction safety risks can be greatly lowered; on the other hand, erected retaining wall side forms can be reduced, the retaining wall can be erected conveniently, and construction cost is saved.

Description

technical field [0001] The invention relates to a method for transforming the front slope retaining wall of a column type abutment. Background technique [0002] Due to the low design standards and service during the super-large intermediate repair period, the pre-built road sections have been unable to meet the current demand for large traffic volumes, and are facing problems such as reconstruction, expansion, and upgrading of road grades. Therefore, speeding up the expansion and transformation of the roads built in the early stage and improving the technical level of the road network is one of the main tasks of the transportation work at present and in the future. [0003] At present, highway reconstruction generally includes two methods: new construction and widening. [0004] For new roads, it is easy to cause waste of resources in road corridors and poor social benefits. And the density of the road network increases, making the influence area overlapped repeatedly. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/02E02D17/20E02D15/04
Inventor 李煜科朱登元
Owner 李煜科
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