Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
External prestress auxiliary stay cable replacement construction method
The invention discloses an external prestressing auxiliary stay cable replacement construction method which comprises the following steps: sequentially measuring the cable force and cable length of an old cable on a bridge body, measuring the elevation of a bridge floor, preparing construction machinery and materials, mounting an external prestressing facility at an outer web of a main beam needing cable replacement, dismantling ancillary facilities of the old cable, and detecting the initial loose cable force of the cable body. Grading tensioning of the external pre-stress facility and grading releasing of the old stay cable are conducted synchronously, new cable transportation to a bridge, cable unfolding on a beam surface, tower end hanging, beam end traction, tower end traction, grading releasing of the external pre-stress facility and grading tensioning of the new cable are conducted synchronously, accessories are installed and checked, and the next cable is replaced to remove the external pre-stress facility; by arranging the external prestress facility, when the bridge body stay cable is subjected to replacement construction operation, prestress can be provided for the main beam all the time in the cable replacement process, the influence on the deflection and structural stress of the main beam in the cable replacement process is reduced, and the safety of the main beam structure in the cable replacement process is guaranteed.
本发明公开一种体外预应力辅助斜拉索更换施工方法，依次测量桥体上旧索索力与索长、测量桥面标高、准备施工机械与材料，在所需换索的主梁外腹板处安装体外预应力设施，拆除旧索附属设施，检测索体初始松动索力，体外预应力设施分级张拉和旧斜拉索分级放张同步进行，新索运输上桥、梁面展索、塔端挂设、梁端牵引和塔端牵引，体外预应力设施分级放张和新索分级张拉同步进行，附件配件安装、检查，更换下一根索拆除体外预应力设施；通过设置体外预应力设施，在该桥体斜拉索进行更换施工操作时，可以在换索过程中始终为主梁提供预应力，减小了在换索过程中对主梁挠度及结构应力的影响，保障了换索过程中主梁结构的安全性。
External prestress auxiliary stay cable replacement construction method
The invention discloses an external prestressing auxiliary stay cable replacement construction method which comprises the following steps: sequentially measuring the cable force and cable length of an old cable on a bridge body, measuring the elevation of a bridge floor, preparing construction machinery and materials, mounting an external prestressing facility at an outer web of a main beam needing cable replacement, dismantling ancillary facilities of the old cable, and detecting the initial loose cable force of the cable body. Grading tensioning of the external pre-stress facility and grading releasing of the old stay cable are conducted synchronously, new cable transportation to a bridge, cable unfolding on a beam surface, tower end hanging, beam end traction, tower end traction, grading releasing of the external pre-stress facility and grading tensioning of the new cable are conducted synchronously, accessories are installed and checked, and the next cable is replaced to remove the external pre-stress facility; by arranging the external prestress facility, when the bridge body stay cable is subjected to replacement construction operation, prestress can be provided for the main beam all the time in the cable replacement process, the influence on the deflection and structural stress of the main beam in the cable replacement process is reduced, and the safety of the main beam structure in the cable replacement process is guaranteed.
本发明公开一种体外预应力辅助斜拉索更换施工方法，依次测量桥体上旧索索力与索长、测量桥面标高、准备施工机械与材料，在所需换索的主梁外腹板处安装体外预应力设施，拆除旧索附属设施，检测索体初始松动索力，体外预应力设施分级张拉和旧斜拉索分级放张同步进行，新索运输上桥、梁面展索、塔端挂设、梁端牵引和塔端牵引，体外预应力设施分级放张和新索分级张拉同步进行，附件配件安装、检查，更换下一根索拆除体外预应力设施；通过设置体外预应力设施，在该桥体斜拉索进行更换施工操作时，可以在换索过程中始终为主梁提供预应力，减小了在换索过程中对主梁挠度及结构应力的影响，保障了换索过程中主梁结构的安全性。
External prestress auxiliary stay cable replacement construction method
一种体外预应力辅助斜拉索更换施工方法
ZHU XUEJIAN (Autor:in) / WANG LEI (Autor:in) / LIU SHAOHUA (Autor:in) / LI WAN (Autor:in) / LIU WEI (Autor:in)
12.11.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
E01D
BRIDGES
,
Brücken
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