Demolishing method for widened overpass of highway

A technology for highways and flyovers, applied in building maintenance, construction, building construction, etc., can solve problems such as inability to meet construction progress requirements, long construction period, obstructing traffic, etc., and achieve smooth and safe operation, construction safety, and good social benefits And economic benefits, the effect of saving construction costs

Inactive Publication Date: 2011-03-16
中铁七局集团第一工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It takes one and a half months to dismantle an overpass. It takes 1,800 yuan to remove a square of concrete with a wire saw or a disc saw. The total cost of dismantling an overpass is about 400,000 yuan. Unable to meet construction progress requirements

Method used

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  • Demolishing method for widened overpass of highway
  • Demolishing method for widened overpass of highway
  • Demolishing method for widened overpass of highway

Examples

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Embodiment Construction

[0024] As shown in Figures 1, 2, and 3: When the main line of the expressway needs to be widened, and the bridge span of the overpass cannot meet the needs, it must be demolished and rebuilt. The overpass is removed within the widening section of the expressway. The span of the bridge deck is 5.5m, and the clear height to the expressway is 5m. m, the upper structure is a prestressed concrete hollow slab, the lower structural piers and foundations are single-column piers and column foundations, and the abutment and foundation are single-column abutments and pile foundations.

[0025] The specific steps for removal are as follows.

[0026] (1) Construction preparation: ① On-site power supply (380V150Kw and 220V lighting power), or a generator of 200Kw, clean water source (it is difficult to supply water source by sprinkler on site). ② Clean up and level off the site. ③Study the traffic control plan and submit it for approval. Make fences and traffic and safety warning signs a...

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Abstract

The invention relates to the technical field of highways, and discloses a demolishing method for a widened overpass of a highway, which gradually demolishes according to a sequence of a main span superstructure, a side span superstructure, a side span pier and a middle pier by a method of implementing in sections, enclosing in ways and ensuring safety. The method of the invention comprises the following construction steps: preparing for construction; opening and constructing median strip; enclosing one way of the highway and protecting the road surface; completely removing beam surfaces and collision guardrails; lifting the collision guardrails and beam slabs away; demolishing a pier 6 column coping; clearing the site; opening one roadway; enclosing the other roadway; removing beam surfaces and collision guardrails; lifting the collision guardrails and beam slabs away; demolishing the pier 6 column coping; finally removing and lifting the middle pier coping and pier columns; and clearing the site. The invention can ensure smooth and safe operation of the highway in the construction period, so that the construction period is shortened and large amounts of construction costs is saved. The invention has simplicity, wide range of use, easy popularization and better social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of expressways, in particular to a method for removing an expressway widening overpass. Background technique [0002] With the rapid development of the country's economic construction, it is imperative to widen the highway, and the existing bridge spans of the corresponding highway cannot meet the needs, so they must be demolished and relocated. Existing methods for dismantling the existing flyovers of the expressway are: using a core drill and a large plate saw to cut the concrete guardrail and hoisting in sections; Saw and cut the pier body, and hoist the cover beam in blocks. Complete the demolition work. It takes one and a half months to dismantle an overpass. It takes 1,800 yuan to remove a square of concrete with a wire saw or a disc saw. The total cost of dismantling an overpass is about 400,000 yuan. Unable to meet the construction schedule requirements. Contents of the invention [0003] In vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D24/00
Inventor 邓德义王险峰
Owner 中铁七局集团第一工程有限公司
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