Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method for tensioning external prestressing tendons of skew arch bridge
The invention discloses a construction method for tensioning external prestressing tendons of a skew arch bridge, which comprises the following steps of: symmetrically laying the prestressing tendons by taking a center line in the length direction of the skew arch bridge as an axis, numbering the prestressing tendons as N1, N2, N1, N1, N2 and N1 in sequence, firstly tensioning four N1 prestressing tendons, calibrating tensioning equipment before tensioning, and calibrating the tensioning equipment before tensioning; during tensioning, tensioning quality control is carried out by adopting a bilateral symmetry principle and taking tensioning prestress as a main part and elongation as an auxiliary part, then arch bridge side wall construction, backfilling of bubble concrete on an arch back and laying of a bridge pavement water-stable structure layer are continued, two remaining N2 prestressing tendons are tensioned, and quality control is carried out by adopting a control method the same as that of N1 prestressing tendons. According to the tensioning method, redundant horizontal thrust generated by oblique crossing of the bridge is effectively counteracted through two times of tensioning and graded loading, so that a bridge structure system is stable, and the safety of the bridge structure is ensured.
本发明公开了一种用于斜交拱桥体外预应力束张拉的施工方法，该方法中预应力束的铺设方式为，以斜交拱桥长度方向上的中心线为轴线对称铺设，对预应力束进行编号，依次为N1、N2、N1、N1、N2、N1，先张拉其中4束N1预应力束，张拉前对张拉设备进行标定，张拉时采用左右对称的原则，以张拉预应力为主，伸长量为辅进行张拉质量控制，然后继续拱桥侧墙施工，拱背回填气泡混凝土，铺设桥梁路面水稳结构层，再张拉剩下2束N2预应力束，采取与N1预应力束同样的控制方法进行质量控制。该张拉方法通过2次张拉，分级加载，有效抵消桥梁由于斜交产生多余水平推力，使桥梁结构体系稳固，确保桥梁结构安全。
Construction method for tensioning external prestressing tendons of skew arch bridge
The invention discloses a construction method for tensioning external prestressing tendons of a skew arch bridge, which comprises the following steps of: symmetrically laying the prestressing tendons by taking a center line in the length direction of the skew arch bridge as an axis, numbering the prestressing tendons as N1, N2, N1, N1, N2 and N1 in sequence, firstly tensioning four N1 prestressing tendons, calibrating tensioning equipment before tensioning, and calibrating the tensioning equipment before tensioning; during tensioning, tensioning quality control is carried out by adopting a bilateral symmetry principle and taking tensioning prestress as a main part and elongation as an auxiliary part, then arch bridge side wall construction, backfilling of bubble concrete on an arch back and laying of a bridge pavement water-stable structure layer are continued, two remaining N2 prestressing tendons are tensioned, and quality control is carried out by adopting a control method the same as that of N1 prestressing tendons. According to the tensioning method, redundant horizontal thrust generated by oblique crossing of the bridge is effectively counteracted through two times of tensioning and graded loading, so that a bridge structure system is stable, and the safety of the bridge structure is ensured.
本发明公开了一种用于斜交拱桥体外预应力束张拉的施工方法，该方法中预应力束的铺设方式为，以斜交拱桥长度方向上的中心线为轴线对称铺设，对预应力束进行编号，依次为N1、N2、N1、N1、N2、N1，先张拉其中4束N1预应力束，张拉前对张拉设备进行标定，张拉时采用左右对称的原则，以张拉预应力为主，伸长量为辅进行张拉质量控制，然后继续拱桥侧墙施工，拱背回填气泡混凝土，铺设桥梁路面水稳结构层，再张拉剩下2束N2预应力束，采取与N1预应力束同样的控制方法进行质量控制。该张拉方法通过2次张拉，分级加载，有效抵消桥梁由于斜交产生多余水平推力，使桥梁结构体系稳固，确保桥梁结构安全。
Construction method for tensioning external prestressing tendons of skew arch bridge
一种用于斜交拱桥体外预应力束张拉的施工方法
ZHAO WANDE (Autor:in)
23.12.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
E01D
BRIDGES
,
Brücken
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