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Cable-stayed bridge main-beam sliding form frame system and construction method

A sliding form, cable-stayed bridge technology, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of construction quality, construction safety cannot be guaranteed, support structure cannot be fully utilized, and bridge alignment is not easy to control. and other problems, to achieve the effect of easy control of the bridge line, saving manpower and overcoming adverse effects

Inactive Publication Date: 2008-04-09
THE 2ND ENG CO LTD MBEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The construction of the main girder of Shenyang Gonghe Bridge is limited by the low space under the bridge and the nearly 10,000-volt high-voltage line. If the existing and conventional hanging basket construction method is used, not only the construction quality and construction safety cannot be guaranteed, but Moreover, the construction period is long, and the line shape of the bridge is not easy to control. At the same time, the support structure cannot make full use of turnover equipment such as Bailey trusses, and the cost is relatively high.

Method used

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  • Cable-stayed bridge main-beam sliding form frame system and construction method

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Embodiment 1

[0025] Example 1, the main beam of the Bailey truss sliding formwork is assembled with 1.5m truss height Bailey truss, with a total length of 42m and a width of 24.9m. It is composed of three parts: load-bearing beam, front and rear nose bridge; bearing beam 24m, The horizontal direction is composed of 41 pieces of Bailey truss to meet the construction requirements of three sections; the nose bridge is 9m long, and there are 12 pieces in total, each of which forms a group. The spacing of the Bere slices of the cross-bridge formwork is arranged according to the load distribution characteristics of different parts of the main girder, and strive to balance the force and coordinate deformation of each slice. The Bailey truss pieces are connected as a whole through a horizontal connection system. Each group of the bridge of the nose is connected as a whole with a horizontal link. The top of the Bailey truss sliding formwork is provided with a slidable integral bottom form of the main b...

Embodiment 2

[0031] The bridge is a prestressed concrete single-cable-plane single-tower cable-stayed bridge with a two-span span of 114+120m and a total length of 236m. The beams, towers and piers at the main tower are consolidated. The main beam is a single-box five-chamber box structure of equal height, with a beam surface width of 32m and a beam height of 3.16m at the center line. The cantilever plates on both sides of the section are each 4.75m long, divided into upper and lower layers. The main beam construction is divided into 32 sections along the bridge. Among them, the tower pier beam joint part 0 # Block, west side -1 # ~-15 # Segment, east side +1 # ~+16 # Segment, divide by 0 # Segment, -15 # , +16 # Except for the segments, the remaining segments are of standard size, 6.66m in length. The bent piles of the fixed buttresses are arranged according to the direction of the railway line and the cameras are arranged. The distance between buttresses is not equal, and the maximum is abou...

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Abstract

The invention relates to a main girder slide die carrier system and a construction method of cable-stayed bridges, with steps as follows: when the construction 0# segment is finished, a bailey truss sliding die carrier is extended, which is divided into three groups that respectively move forward to next row of supporting piers; a construction segment bottom die is dragged to place; a fore-fulcrum elevation of the die carrier is adjusted; suspenders are stretched ahead; segmental steel bars and prestressing tendons are bound; segmental concrete is poured; segmental pre-stressing tendons are stretched; the die carrier is down adjusted; the bottom die is moved forward to next segmental place; and the steps are repeated. The invention has the advantages that by using the stress system of front supporting and back cable staying, one part of load has transferred to a cast girder segment, and the other part is borne by temporary piers, stressing is definite, calculation is easy, working condition is unified, and main girder linear adjustment control is convenient. The invention is applicable not only to concrete connecting girders and T-frames, but also to cable-stayed bridges with various cross-sectional shapes, achieves single cable plane, small transverse stiffness, wide flange plate cross section main girder, and whole section global casting, saves labor and materials, enjoys a short construction period and standardized construction, and is stable, safe and reliable.

Description

Technical field [0001] The invention relates to a sliding formwork system and a construction method for the main beam of a cable-stayed bridge, and belongs to the technical field of bridge construction. Background technique [0002] The construction of the main girder of the Shenyang Gonghe Bridge is limited by the low space below the bridge and the high-voltage line of nearly ten thousand volts. If the existing and conventional hanging basket construction method is used, not only the construction quality and construction safety cannot be guaranteed. Moreover, the construction period is long, the bridge line type is not easy to control, and the support structure cannot make full use of turnover equipment such as Bailey truss, and the cost is high. Summary of the invention [0003] The present invention aims to overcome the defects in the prior art, and proposes a construction method using a sliding formwork for the main girder of a cable-stayed bridge and a sliding formwork equi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D21/10
Inventor 许佳平农代培罗瑞华王建华孟钢陈卫成汪志榜杨齐海陈长明黄中华戴宗诚周璞刘晓霞张建红范学梅
Owner THE 2ND ENG CO LTD MBEC
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