Construction method of splicing widening structure of new and old subgrade light soil based on prefabricated formwork

Abstract

The invention relates to a method for construction of a new and old roadbed light-soil splicing broadening structure based on a fabricated formwork. The method mainly comprises the following steps of construction preparing, embankment pile arranging, on-site poured sash beam and boundary beam construction, T-shaped anti-shear part and jacking installation, prefabricated side slope plate installation, steel bar net piece laying, light soil refilling, new road surface layer construction and green operation in side slope sash beam. According to the method for the construction of the new and old roadbed light-soil splicing broadening structure based on the fabricated formwork, juncture of new and old roadbeds of the embankment broadening structure is high in anti-shear capacity and good in stability.

Description

technical field [0001] The invention relates to a construction method for splicing and widening structure of old and new subgrades, in particular to a construction method for splicing and widening structure of old and new subgrades based on assembled templates, which can strengthen the joint strength of new and old subgrades and enhance the overall quality of subgrade and pavement Anti-deformation ability to prevent pavement cracking. It belongs to the field of highway engineering and is suitable for old road reconstruction and expansion projects, especially for high embankment road widening projects in soft soil areas. Background technique [0002] In recent years, with the rapid development of my country's economy, the traffic volume of highways has been increasing year by year, and the traffic volume of some highways is close to saturated traffic volume. In this regard, in order to meet the growing traffic demand and social development needs, road reconstruction and expan...

AI Technical Summary

Problems solved by technology

However, for the widening construction of high embankment and subgrade in soft soil areas, the above measures are not enough. When the high embankment and subgrade are widened, the uneven settlement of the old and new subgrade is still relatively obvious, especially on the widening side, the settlement difference of the old subgrade slope is obvious, resulting in a sudden change point, where uneven settlement cracks and sliding shear surfaces are likely to occur

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