Roadbed widening door opening type retaining wall structure and construction method thereof

Abstract

The invention provides a roadbed widening door opening type retaining wall structure and a construction method thereof. The retaining wall structure comprises a bearing layer, a soft foundation is arranged on the bearing layer, cement mixing piles are arranged in the soft foundation, an original roadbed is arranged on the soft foundation, the top of the original roadbed is an original road surface, the side face of the original roadbed is a slope surface, a step-shaped platform is arranged on the slope surface, and two rows of cement fly ash gravel piles are driven at corresponding positions to serve as foundation piles; the structure further comprises a door opening type reinforced concrete frame, and the two bottoms of the door opening type reinforced concrete frame are supported on the cement fly ash gravel piles respectively; and light foam concrete is filled between the left side of the door opening type reinforced concrete frame and the step-shaped platform on the original embankment, and the top of the door opening type reinforced concrete frame is provided with a widened pavement which is in butt joint with the original pavement. Differential settlement of the widened roadbed and the old roadbed can be effectively reduced, the stability of the roadbed is improved, the stability problem of the guardrail foundation is solved, on the premise that land resources and the environment are protected, the cost of soft foundation treatment and land acquisition is saved, the construction progress is accelerated, and good economic and technical benefits are achieved.

Description

technical field [0001] The present invention relates to a roadbed widening structure and a construction method, in particular to a roadbed widening gate-type retaining wall structure and a construction method, which can not only expand the application range of roadbed widening, but also improve the strength and construction speed of widening roadbeds , especially suitable for road widening projects on soft ground sections where land acquisition is difficult and fillers are scarce. Background technique [0002] With the development of the economy and the sharp increase in traffic volume, the existing highways need to be widened and reconstructed. From the comprehensive aspects of economy and resources, the reconstruction plan is mainly based on widening on both sides. For the widening of soft soil subgrade, if it is not handled properly, it will bring great harm to the project, mainly including uneven settlement at the widening part, subgrade instability and other disease typ...

AI Technical Summary

Problems solved by technology

This structure can not only effectively improve the stability of widened subgrades and control the uneven settlement between old and new subgrades, but also effectively solve the prominent problems of widened subgrades such as land acquisition, filling, and stability of guardrail foundations, expanding the application range of widened subgrades

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