Construction method of double-limb thin-walled pier of bridge

A construction method and technology for thin-walled piers, which are applied to bridges, bridge parts, bridge materials, etc., can solve the problems of slow construction speed, long construction period and high construction cost, and achieve the effects of fast construction speed, short construction period and easy formwork removal.

Inactive Publication Date: 2019-02-19
CHINA RAILWAY 19TH BUREAU GRP SECOND ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing double-leg thin-walled piers generally have the problems of slow construction speed, long construction period and high construction cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Pier reinforcement installation:

[0029] The root of the main bar of the pier body extends into the platform part. The main bar is threaded at the ground processing site using a pier thick machine to thread the connecting end. The threaded connection end is connected by a sleeve. The pier rebar is installed every 9.0 meters. Temporary internal and external scaffolding is set up at the top of the pier to support the main reinforcement, which facilitates the binding of stirrups and connecting ribs and the installation of other embedded parts;

[0030] The main reinforcement of each section is lifted by a tower crane, and nuts are inserted into the top of the pier column manually and installed in place;

[0031] Turnover mold assembly:

[0032] The formwork is lifted by tower crane equipment and installed manually. The horizontal joints and vertical joints of the inner and outer molds are all made into flat openings, and 3~5mm rubber stop grout is filled during installation to pr...

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PUM

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Abstract

The invention relates to a construction method of a double-limb thin-wall pier of a bridge and mainly aims at solving the problem of slow construction speed in prior construction of the two-limb thin-wall pier of the bridge. The method comprises the following steps of: pier body reinforcement installation: wherein, the root part of the pier body main reinforcement extends into a cap part, straightthread rolling is carried out on a connecting end of the main reinforcement in a ground processing site by using a heading machine, a sleeve is connected with the threaded connecting end; rollover formwork assembly: wherein, the formworks is raised by using a tower crane, and the horizontal joint and vertical joint of the internal and external formworks are made into flat joints. Rubber stop grout is filled during installation; installation of internal and external operation platforms and a protection system; pier body concrete is lifted and put into the formworks, manual vibration is carriedout by using a plug-in vibration bar, when the concrete is poured, horizontal distribution in layers is carried out; concrete curing; the formworks are removed and turned up and circulated to the topof the pier; after completion of a first cycle of construction, a next cycle, which includes steel bar binding, formwork lifting and concrete pouring, is carried out. The method has the advantage offast construction speed.

Description

Technical field: [0001] The invention relates to a construction method of double-limbed thin-walled piers of bridges. Background technique: [0002] The double-limbed thin-walled pier is a commonly used pier form for large and medium-span highway bridges at this stage. Its structure is characterized by two parallel pier walls hinged or rigidly connected to the main girder. Reinforced concrete double-limbed thin-walled piers can increase the rigidity of the pier, reduce the peak reaction force of the main girder, and increase the beauty of the bridge. The prestressed concrete continuous rigid frame bridge adopts a pier-beam consolidation system, where the double thin-walled high pier is an ideal flexible pier, which can support the superstructure and keep the pier stable, but also has a certain degree of flexibility to meet the needs of the displacement of the superstructure , Its thrust resistance stiffness is 1 / 4 of the thrust resistance stiffness of single-limbed thin-walled p...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D19/02
CPCE01D19/02E01D21/00E01D2101/268
Inventor 王东明崔志成司伟峰白君才全宗坤李润双刘福春
Owner CHINA RAILWAY 19TH BUREAU GRP SECOND ENG CO LTD
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