Width and heightening structure and construction method of subgrade in existing retaining wall section

Abstract

The invention relates to an existing retaining wall section roadbed widening and heightening structure and a construction method. An existing bank slope is excavated to be in a stepped shape. Cast-in-situ bored piles and uprights are arranged on the outer side of an original retaining wall. A cast-in-place slab is poured to the original retaining wall and the uprights, and L-shaped prefabricated boards are arranged on the outer side of the cast-in-place slab to serve as templates for pouring bubble concrete. The bubble concrete is poured back on the cast-in-place slab in a stepped manner. By the adoption of the related structure and the construction method, the construction schedule and the construction quality of the roadbed widening structure can be guaranteed, the dead weight of an embankment is reduced, the economical efficiency and safety of construction are guaranteed, the construction procedures are simplified, land resources are saved, and economic and technical benefits are relatively good.

Description

technical field [0001] The invention relates to an existing retaining wall section roadbed heightening structure, in particular to a construction method for the existing retaining wall section roadbed widthning and heightening structure. technical background [0002] With the continuous development of the economy, the continuous progress of the rural economy in recent years, and the continuous improvement of people's living standards, people's requirements for the quality of life are also getting higher and higher. Road traffic is one of the basic facilities for people's daily travel, in order to ensure that people travel more comfortably and conveniently. Many existing roads are restricted by the socio-economic level, technical level and construction concept at the time of construction, and a considerable part of them cannot meet the requirements of traffic growth and social development. The reconstruction and expansion of existing roads has become another solution besides...

AI Technical Summary

Problems solved by technology

At the same time, during the roadbed widening construction process, the retaining wall of the original roadbed slope protection needs to be removed, which may cause landslides. At the same time, the new roadbed needs to be re-graded after the construction of the roadbed piles, which takes up a lot of land resources.

In the past, no treatment was done under the cushion layer under the new and old subgrade stages, and a single cushion layer may cause the cushion layer to slip

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