Capping beam and straining beam reverse construction method of concrete cylinder piers

A construction method and concrete technology, applied in bridges, bridge construction, bridge parts, etc., can solve problems such as difficulty in changing or partially widening construction access roads, insufficient and effective use of pier and column formwork, and increasing pier and column construction time. , to achieve the effect of saving the cost of construction measures, strong bearing capacity, and widening the construction access road

Pending Publication Date: 2017-08-29
GUANGXI ROAD CONSTR ENG GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. After the construction of some short tie beams is completed, the original construction access road will be affected. However, the slopes in the mountains and mountains are steep, and some are even rocky. It is difficult to change or partially widen the construction access road
[0006] 2. Construct in sequence, and the pier column must wait for the strength of the tie beam to meet the requirements before the pier column can continue to be co

Method used

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  • Capping beam and straining beam reverse construction method of concrete cylinder piers
  • Capping beam and straining beam reverse construction method of concrete cylinder piers
  • Capping beam and straining beam reverse construction method of concrete cylinder piers

Examples

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Embodiment example 1

[0072] A bridge with a length of 240m is designed on a rocky half-slope. The upper structure is two sections of 4×30m prestressed concrete first simply supported and then continuous T-beam. According to the height of the pier, there are 1-3 tie beams. If traditional construction methods are used to construct pier columns, tie beams, and cover beams in sequence, some tie beams will have an impact on the original construction access road after construction, and the construction access road route needs to be re-set, and the construction access road level must be raised or widened. The original construction access road, but due to the influence of the geological environment, it is very difficult to construct the second construction access road. In addition, there are many pier columns in this bridge, and the cylindrical formwork cannot be fully and effectively used, which affects the construction progress. The pier column, tie beam, and cover beam are constructed in reverse order...

Embodiment example 2

[0074] The length of a bridge is 510m. The superstructure is 5×30m+2×30m+4×30m+3×30m+3×30m. The prestressed concrete is first simply supported and then continuous T-beam. It is φ1.8m and the height is 8.29m-30.19m According to the practice and experience of Case 1, using the material turnover in Case 1 greatly reduces the cost and saves the construction period. By adopting the invention, the construction period is greatly shortened, and the construction cost is greatly reduced.

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Abstract

The invention relates to the field of bridge construction, in particular to a capping beam and straining beam reverse construction method of concrete cylinder piers. According to the method, on the basis of a traditional column formwork, embedded steel bar matrix holes are formed according to a straining beam steel bar arrangement diagram, it is achieved that steel bars are embedded at the embedded steel bar matrix positions according to requirements during the construction of bridge cylinder piers, straining beams are not constructed at first, pier columns are firstly constructed to the pier tops, then capping beams are constructed, finally, bottom supporting structures of the capping beams are integrally lowered to serve as bottom supporting structures of the nearest straining beam on the lower side, the straining beams are constructed, and construction is conducted on the straining beams in sequence in a height decreasing mode so as to achieve the aim of straining beam reverse construction. By means of the method, the problem that a construction road is changed or broadened can be avoided, and the method has the advantages that the pier column construction sections are reduced, the construction progress is accelerated, full and effective utilization of the construction formwork is ensured, the process that the bottom supporting structures of the straining beams and the capping beams need to be built and removed repeatedly is omitted, and the construction cost is reduced.

Description

technical field [0001] The invention relates to the field of construction of concrete cylindrical piers of bridges, in particular to a reverse sequence construction method of cap beams and tie beams of concrete cylindrical piers, and is suitable for the construction of concrete cylindrical piers of bridges with tie beams. Background technique [0002] At present, my country's highway infrastructure construction has advanced from plain areas to hilly and high mountains, and with the continuous improvement of national environmental protection laws and regulations, the concept of engineering environmental protection has been continuously strengthened. In transportation construction, from planning, survey and design, construction to operation, They are all implementing the concept and requirements of environmental protection. The form of bridges and tunnels gradually replaces large-scale filling and excavation and other construction methods that are more destructive to the environ...

Claims

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Application Information

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IPC IPC(8): E01D19/02E01D21/00E04G13/02
CPCE01D19/02E01D21/00E04G13/021
Inventor 张坤球韦大川姚青云李育林张文廖翼强
Owner GUANGXI ROAD CONSTR ENG GRP CO LTD
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