A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hogging moment area low-shrinkage bridge structure and construction method thereof
The invention discloses a hogging moment area low-shrinkage bridge structure and a construction method thereof. Basic filling of joints can be completed through prefabricated core blocks, so that cast-in-place of concrete is reduced. As core blocks are of a prefabricated structure, the shrinkage effect of concrete is basically eliminated, and the cracking risk of the concrete due to self reasons is reduced. And the joints and the core blocks are cast in place through the ultra-high performance concrete, so that the quality of the joints can be guaranteed only through a small amount of the ultra-high performance concrete, and economical efficiency and reliability are achieved. Besides, at least one layer of first reinforcing steel bars are embedded in the core blocks in the length directionof a bridge, multiple layers of second reinforcing steel bars are embedded at corresponding positions in a composite beam in the length direction of the composite beam, and when the core blocks are placed into joints, the second reinforcing steel bars can be mechanically connected or welded to the first reinforcing steel bars, so that the stress performance of the core blocks and the safety of the whole bridge structure are ensured. The invention aims to solve the technical problem that an existing hogging moment area joint structure is prone to shrinkage cracking.
本发明公开了一种负弯矩区低收缩的桥梁结构及其施工方法，通过预制核心块可以完成接缝的基本填充，从而减少混凝土的现浇。由于核心块为预制结构，混凝土收缩效应已基本消除，减少混凝土自身原因的开裂风险。而接缝与核心块之间则通过超高性能混凝土现浇，从而仅以小体量的超高性能混凝土即可保证接缝的质量，经济又可靠。此外，核心块中沿桥梁长度方向埋设有至少一层第一钢筋，组合梁中对应位置沿自身长度方向埋设有多层第二钢筋，在核心块放入接缝时，第二钢筋能够与第一钢筋机械连接或焊接，从而确保核心块的受力性能，确保桥梁整体结构的安全性。本发明旨在解决现有负弯矩区接缝结构容易出现收缩开裂的技术问题。
Hogging moment area low-shrinkage bridge structure and construction method thereof
The invention discloses a hogging moment area low-shrinkage bridge structure and a construction method thereof. Basic filling of joints can be completed through prefabricated core blocks, so that cast-in-place of concrete is reduced. As core blocks are of a prefabricated structure, the shrinkage effect of concrete is basically eliminated, and the cracking risk of the concrete due to self reasons is reduced. And the joints and the core blocks are cast in place through the ultra-high performance concrete, so that the quality of the joints can be guaranteed only through a small amount of the ultra-high performance concrete, and economical efficiency and reliability are achieved. Besides, at least one layer of first reinforcing steel bars are embedded in the core blocks in the length directionof a bridge, multiple layers of second reinforcing steel bars are embedded at corresponding positions in a composite beam in the length direction of the composite beam, and when the core blocks are placed into joints, the second reinforcing steel bars can be mechanically connected or welded to the first reinforcing steel bars, so that the stress performance of the core blocks and the safety of the whole bridge structure are ensured. The invention aims to solve the technical problem that an existing hogging moment area joint structure is prone to shrinkage cracking.
本发明公开了一种负弯矩区低收缩的桥梁结构及其施工方法，通过预制核心块可以完成接缝的基本填充，从而减少混凝土的现浇。由于核心块为预制结构，混凝土收缩效应已基本消除，减少混凝土自身原因的开裂风险。而接缝与核心块之间则通过超高性能混凝土现浇，从而仅以小体量的超高性能混凝土即可保证接缝的质量，经济又可靠。此外，核心块中沿桥梁长度方向埋设有至少一层第一钢筋，组合梁中对应位置沿自身长度方向埋设有多层第二钢筋，在核心块放入接缝时，第二钢筋能够与第一钢筋机械连接或焊接，从而确保核心块的受力性能，确保桥梁整体结构的安全性。本发明旨在解决现有负弯矩区接缝结构容易出现收缩开裂的技术问题。
Hogging moment area low-shrinkage bridge structure and construction method thereof
一种负弯矩区低收缩的桥梁结构及其施工方法
2020-06-09
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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