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Construction method of subgrade widening structure

A construction method and roadbed technology, which is applied in roads, roads, buildings, etc., can solve the problems that the compactness cannot meet the design standard, the new and old roadbeds are complicated in technology, and the construction is difficult, so as to improve the stability of the foundation and simplify the construction process. , The effect of improving construction efficiency

Active Publication Date: 2019-01-22
西安市市政建设(集团)有限公司
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Problems solved by technology

[0005] (3) The technology at the junction of the new and old subgrades is relatively complex, and the construction is difficult, and artificial quality factors often occur here, such as the compactness does not meet the design standards, etc., which is also one of the reasons for cracks

Method used

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  • Construction method of subgrade widening structure
  • Construction method of subgrade widening structure
  • Construction method of subgrade widening structure

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Embodiment Construction

[0036] figure 1 is a schematic diagram of the subgrade widening structure, figure 2 It is the top view of the prefabricated side slab installation before the cast-in-place base slab construction, image 3 yes figure 2 Middle A-A sectional view. Referring to the subgrade widening structure shown in the accompanying drawings, it is mainly composed of prefabricated side slabs, prefabricated assembled side slabs 9, cast-in-place concrete bottom slabs 23, air-filled concrete backfill layers 16, and the like.

[0037] The slope at the interface between the original subgrade and the new subgrade is set in a step shape, and the prefabricated side panels are set on both sides of the cast-in-place concrete bottom slab groove 34, and are fixed by the side panel soil nails 25, the lower solidified soil layer 28 and the in-situ surface 26; the prefabricated assembly type The side plate 9 is arranged on the side plate rib 27, and the two sides are respectively provided with an oblique ...

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Abstract

The invention relates to a construction method of a roadbed widening structure. The method mainly comprises the following steps of: excavation and trimming of an original roadbed; construction of a solidified soil layer; construction of the solidified soil layer; construction of a prefabricated assembled lateral plate; construction of a cast-in-place concrete bottom plate; construction of a bubble concrete backfill layer; construction of a dang residue backfill layer; and construction of pavements and auxiliary facilities. The method provided by the invention not only improves the fixing effect and joining conforming strength between a novel roadbed and an original roadbed, but also enhances the strength of the novel roadbed and the stability of a slope of the roadbed.

Description

technical field [0001] The invention relates to a construction method for a roadbed widening structure, which belongs to the technical field of road construction and is used for solving the problems of easy settlement and slippage in the existing roadbed widening structure, and is suitable for the widening construction of the existing embankment. Background technique [0002] With the rapid development of the national economy and society, changes in the regional economy, and changes in people's lives and travel patterns, the original road standards can no longer meet the development requirements of modern transportation, and a large number of local roads urgently need to be upgraded. However, the current structure of road widening and its construction technology often lead to excessive differential settlement, pavement cracking, local subsidence and other diseases on the road surface. The main reasons are: [0003] (1) After the widening of the old and new subgrades, the mat...

Claims

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Application Information

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IPC IPC(8): E01C3/00
CPCE01C3/00
Inventor 马松涛石利军刘长勇
Owner 西安市市政建设(集团)有限公司
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