Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Circulating construction method for superstructure of concrete beam extradosed cable-stayed bridge
The invention provides a rapid circulation construction method for an upper structure of a concrete beam extradosed cable-stayed bridge (or called as a concrete beam partial cable-stayed bridge). The rapid circulation construction method comprises the steps that firstly, a cable-free beam section at the cantilever end of a main beam is continuously constructed, and then a first concrete beam section in a cable area at the cantilever end of the main beam is constructed; the stay cable corresponding to the previous section is installed and tensioned during the period of binding the steel bars to the latest to-be-poured beam section, then the prestress of the new section is tensioned, and the process of moving the hanging basket for construction and the like is circulated until the whole construction of the cantilever beam section is completed. Compared with an existing segment-by-segment construction method that concrete is firstly poured segment by segment, then prestress is tensioned, and then a stay cable corresponding to the current segment is tensioned, on the premise that the structure cracking risk is controlled, traditional series operation is abandoned as a parallel operation mode of part of key processes, and the construction efficiency is improved. Therefore, the time for installing and tensioning the stay cable in the whole circulating construction process is completely saved, the construction progress can be obviously accelerated, and the construction cost is saved.
本发明提供一种混凝土梁矮塔斜拉桥(或称为混凝土梁部分斜拉桥)上部结构快速循环施工方法：先连续施工主梁悬臂端无索梁段，再施工主梁悬臂端有索区第一个混凝土梁节段，对于后续每一有索节段，都于最新待浇筑梁段绑扎钢筋期间安装并张拉上一节段对应的斜拉索，然后张拉新节段预应力，移动挂篮施工等循环此过程直至悬臂梁段全部施工完成。本发明与现有的混凝土梁矮塔斜拉桥逐节段先浇筑混凝土、再张拉预应力，然后再张拉当前节段对应斜拉索的逐节段建造方法相比，在控制结构开裂风险的前提下，舍弃传统的串联作业为部分关键工艺并行作业方式，从而整个循环建造过程中将斜拉索安装及张拉的时间完全省略，可显著提高施工进度，节约建造成本。
Circulating construction method for superstructure of concrete beam extradosed cable-stayed bridge
The invention provides a rapid circulation construction method for an upper structure of a concrete beam extradosed cable-stayed bridge (or called as a concrete beam partial cable-stayed bridge). The rapid circulation construction method comprises the steps that firstly, a cable-free beam section at the cantilever end of a main beam is continuously constructed, and then a first concrete beam section in a cable area at the cantilever end of the main beam is constructed; the stay cable corresponding to the previous section is installed and tensioned during the period of binding the steel bars to the latest to-be-poured beam section, then the prestress of the new section is tensioned, and the process of moving the hanging basket for construction and the like is circulated until the whole construction of the cantilever beam section is completed. Compared with an existing segment-by-segment construction method that concrete is firstly poured segment by segment, then prestress is tensioned, and then a stay cable corresponding to the current segment is tensioned, on the premise that the structure cracking risk is controlled, traditional series operation is abandoned as a parallel operation mode of part of key processes, and the construction efficiency is improved. Therefore, the time for installing and tensioning the stay cable in the whole circulating construction process is completely saved, the construction progress can be obviously accelerated, and the construction cost is saved.
本发明提供一种混凝土梁矮塔斜拉桥(或称为混凝土梁部分斜拉桥)上部结构快速循环施工方法：先连续施工主梁悬臂端无索梁段，再施工主梁悬臂端有索区第一个混凝土梁节段，对于后续每一有索节段，都于最新待浇筑梁段绑扎钢筋期间安装并张拉上一节段对应的斜拉索，然后张拉新节段预应力，移动挂篮施工等循环此过程直至悬臂梁段全部施工完成。本发明与现有的混凝土梁矮塔斜拉桥逐节段先浇筑混凝土、再张拉预应力，然后再张拉当前节段对应斜拉索的逐节段建造方法相比，在控制结构开裂风险的前提下，舍弃传统的串联作业为部分关键工艺并行作业方式，从而整个循环建造过程中将斜拉索安装及张拉的时间完全省略，可显著提高施工进度，节约建造成本。
Circulating construction method for superstructure of concrete beam extradosed cable-stayed bridge
一种混凝土梁矮塔斜拉桥上部结构循环建造方法
ZHANG DONG (Autor:in) / WANG XUEFENG (Autor:in) / DONG DAOFU (Autor:in) / ZHOU BIN (Autor:in) / CHEN CHANGSONG (Autor:in) / TANG BICHENG (Autor:in) / XIAO JUN (Autor:in) / JIANG YUNFENG (Autor:in) / ZHANG FEI (Autor:in) / PEI MINGHAI (Autor:in)
01.07.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
E01D
BRIDGES
,
Brücken
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