Construction method for achieving accurate position adjustment and closure of high tower column steel tower sections: Fid-Bau Portal

Construction method for achieving accurate position adjustment and closure of high tower column steel tower sections

WANG XUEJIN / ZHU BINDIAN / YANG XU / LIU CHONGJING / TAN LEI / WANG JINYUAN / ZHANG LIUYI / CHEN YUEYUN / SUN QINGSHAN / LOU MENGJIE

Abstract

The invention discloses a construction method for realizing accurate position adjustment and closure of high tower column steel tower sections, which comprises the following steps of: S1, mounting an active cross brace at the third section of concrete tower column at the top to adjust the deviation of the concrete tower column during construction; and S2, four step-shaped steel buttresses are installed on the steel-concrete combined sections of the left tower leg and the right tower leg, every two steel buttresses are installed on the corresponding steel-concrete combined sections, a three-way jack is placed on each steel buttress, a starting section steel tower column is jacked up, the starting section steel tower column is named as ST1, and the position of the starting section steel tower column is accurately adjusted through the three-way jacks. The construction method is suitable for precise position adjustment and closure of the ultrahigh cable-stayed bridge steel tower column. According to the construction method, the mounting precision of the steel tower column can be improved, the overall line type of the tower column is guaranteed, and the construction quality is improved.

本发明公开了一种实现高塔柱钢塔节段精确调位及合龙的施工方法，包括以下步骤：S1、在顶部第三节混凝土塔柱处安装主动横撑，用来调节混凝土塔柱施工时出现的偏位；S2、左右两塔肢钢混结合段安装四个阶梯型钢支墩，钢支墩两两为一组安装于对应钢混结合段，在每个钢支墩上放置三向千斤顶，将起始节段钢塔柱顶起，起始节段钢塔柱命名为ST1，并通过三向千斤顶对起始节段钢塔柱进行精确调位。本发明适用于超高斜拉桥钢塔柱精确调位及合龙的施工方法。此施工方法可提高钢塔柱的安装精度，保证了塔柱的整体线型，提高了施工质量。

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