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Segmented and graded foot sealing design and construction method for eliminating arch foot concrete cracking
The invention discloses a segmented and graded foot sealing design and construction method for eliminating arch foot concrete cracking, which comprises the following steps that an embedded steel pipe in an arch foot foundation is divided into n segments in advance, and the solidification method of the embedded steel pipe is as follows: the embedded steel pipe is sequentially solidified for n times in a segmented manner from bottom to top, and n is greater than or equal to 2; according to the construction steps of the arch bridge, part of the arch bridge structure is correspondingly installed after the embedded steel pipe is solidified every time till the overall construction of the arch bridge is finished. By means of the characteristic that arch bridge stress is completed in a multi-time accumulation mode, traditional pre-buried arch rib one-time foot sealing is adjusted to be segmented and graded foot sealing, so that friction side resistance of the arch ribs and the surfaces of arch feet is reduced, the mechanical reason of cracking of arch foot concrete is eliminated, the phenomenon that the arch bridge root rotting concrete falls off, and the structural safety is affected is avoided; and meanwhile, the arch feet are more reasonable in size and more uniform in stress, so that the strength, rigidity and durability of the arch bridge in the whole life cycle are guaranteed.
本发明公开一种消除拱脚混凝土开裂的分段分级封脚设计及建造方法，包括如下步骤：预先将拱脚基础内的预埋钢管分为n段，预埋钢管的固结方法为：由下往上分段依次固结n次，n≥2；按照拱桥的施工步骤，在预埋钢管每次固结后对应安装部分拱桥结构，直至拱桥整体施工结束。本发明通过拱桥受力是多次累计完成的特点，将传统的预埋拱肋一次性封脚调整为分段分级封脚，以达到降低拱肋与拱脚表面的摩擦侧阻力，消除拱脚混凝土出现开裂的力学原因，避免出现影响结构安全的“拱桥烂根”混凝土脱落现象，同时使拱脚尺寸更加合理，受力更加均匀，使得拱桥全寿命周期内强度、刚度和耐久性得以保证。
Segmented and graded foot sealing design and construction method for eliminating arch foot concrete cracking
The invention discloses a segmented and graded foot sealing design and construction method for eliminating arch foot concrete cracking, which comprises the following steps that an embedded steel pipe in an arch foot foundation is divided into n segments in advance, and the solidification method of the embedded steel pipe is as follows: the embedded steel pipe is sequentially solidified for n times in a segmented manner from bottom to top, and n is greater than or equal to 2; according to the construction steps of the arch bridge, part of the arch bridge structure is correspondingly installed after the embedded steel pipe is solidified every time till the overall construction of the arch bridge is finished. By means of the characteristic that arch bridge stress is completed in a multi-time accumulation mode, traditional pre-buried arch rib one-time foot sealing is adjusted to be segmented and graded foot sealing, so that friction side resistance of the arch ribs and the surfaces of arch feet is reduced, the mechanical reason of cracking of arch foot concrete is eliminated, the phenomenon that the arch bridge root rotting concrete falls off, and the structural safety is affected is avoided; and meanwhile, the arch feet are more reasonable in size and more uniform in stress, so that the strength, rigidity and durability of the arch bridge in the whole life cycle are guaranteed.
本发明公开一种消除拱脚混凝土开裂的分段分级封脚设计及建造方法，包括如下步骤：预先将拱脚基础内的预埋钢管分为n段，预埋钢管的固结方法为：由下往上分段依次固结n次，n≥2；按照拱桥的施工步骤，在预埋钢管每次固结后对应安装部分拱桥结构，直至拱桥整体施工结束。本发明通过拱桥受力是多次累计完成的特点，将传统的预埋拱肋一次性封脚调整为分段分级封脚，以达到降低拱肋与拱脚表面的摩擦侧阻力，消除拱脚混凝土出现开裂的力学原因，避免出现影响结构安全的“拱桥烂根”混凝土脱落现象，同时使拱脚尺寸更加合理，受力更加均匀，使得拱桥全寿命周期内强度、刚度和耐久性得以保证。
Segmented and graded foot sealing design and construction method for eliminating arch foot concrete cracking
一种消除拱脚混凝土开裂的分段分级封脚设计及建造方法
ZHAO YINRU (author) / YOU LING (author) / XIAO JUN (author) / TANG QINGHUA (author) / TIAN QING (author) / ZHU KEZHAO (author) / YIN BANGWU (author)
2024-03-26
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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