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A platform for research: civil engineering, architecture and urbanism
Bearing cable sag adjusting method for asymmetric construction of large-span suspension bridge catwalk
The invention relates to the technical field of bridge construction, and discloses a load-bearing cable sag adjusting method for asymmetric construction of a large-span suspension bridge catwalk, which comprises the following steps: constructing slide-resistant piles, pre-burying an anchoring steel frame, and mounting a tower top anchoring beam; catwalk pilot cables pass through the river, catwalk main bearing cables are installed and temporarily anchored to the tops of the anti-slide piles; catwalk bearing cables are used as rail cables to install steel strands, the two ends of each steel strand are anchored, and the tensioning ends are arranged on the tops of the slide-resistant piles; a tower top catwalk main bearing cable anchoring device is installed, and catwalk rope sag adjustment is conducted according to the principle that the A shore side span is started and propelled to the B shore side span; b, anchoring a bearing cable at the top of a shore tower, and adjusting tension according to the tower deviation condition in the process to ensure that a main tower is vertical; a catwalk surface layer is laid, B-bank anchorage and splay cable saddle construction is completed, and B-bank side catwalk bearing cables are changed from anti-slide piles to saddle parts one by one to be connected with a catwalk anchoring system; b, shoreside catwalk-crossing cable adjustment and surface layer pavement are conducted, in the process, the tension of the steel strands is gradually unloaded according to the tower deviation condition, and the prestressed steel strands can be dismantled after being completely unloaded. The load-bearing cable sag adjusting method for asymmetric construction of the large-span suspension bridge catwalk is suitable for construction of the suspension bridge catwalk, high in safety, good in economical efficiency, high in applicability and capable of accurately adjusting the sag of the load-bearing cable.
本发明涉及桥梁施工技术领域，公开了一种大跨度悬索桥猫道不对称施工的承重索垂度调整方法，方法步骤包括如下：抗滑桩施工和锚固钢架预埋，塔顶锚固梁安装；猫道先导索过江，猫道主承重索安装，临时锚固在抗滑桩顶；利用猫道承重索作为轨索安装钢绞线，钢绞线两端锚固、张拉端设在抗滑桩顶；安装塔顶猫道主承重索锚固装置，猫道绳垂度调整按照由A岸边跨开始，向B岸边跨推进的原则进行；B岸塔顶锚固承重索，过程中根据塔偏情况调节拉力确保主塔竖直；猫道面层铺设，B岸锚碇及散索鞍施工完成，B岸边跨猫道承重索逐根由抗滑桩改换至鞍部与猫道锚固系统连接；B岸边跨猫道调索及面层铺装，过程中根据塔偏情况逐步卸载钢绞线拉力，预应力钢绞线完全卸载后即可拆除。该大跨度悬索桥猫道不对称施工的承重索垂度调整方法，适应于悬索桥猫道施工，安全性高，经济性好，适用性强，可以精确的调整承重索垂度。
Bearing cable sag adjusting method for asymmetric construction of large-span suspension bridge catwalk
The invention relates to the technical field of bridge construction, and discloses a load-bearing cable sag adjusting method for asymmetric construction of a large-span suspension bridge catwalk, which comprises the following steps: constructing slide-resistant piles, pre-burying an anchoring steel frame, and mounting a tower top anchoring beam; catwalk pilot cables pass through the river, catwalk main bearing cables are installed and temporarily anchored to the tops of the anti-slide piles; catwalk bearing cables are used as rail cables to install steel strands, the two ends of each steel strand are anchored, and the tensioning ends are arranged on the tops of the slide-resistant piles; a tower top catwalk main bearing cable anchoring device is installed, and catwalk rope sag adjustment is conducted according to the principle that the A shore side span is started and propelled to the B shore side span; b, anchoring a bearing cable at the top of a shore tower, and adjusting tension according to the tower deviation condition in the process to ensure that a main tower is vertical; a catwalk surface layer is laid, B-bank anchorage and splay cable saddle construction is completed, and B-bank side catwalk bearing cables are changed from anti-slide piles to saddle parts one by one to be connected with a catwalk anchoring system; b, shoreside catwalk-crossing cable adjustment and surface layer pavement are conducted, in the process, the tension of the steel strands is gradually unloaded according to the tower deviation condition, and the prestressed steel strands can be dismantled after being completely unloaded. The load-bearing cable sag adjusting method for asymmetric construction of the large-span suspension bridge catwalk is suitable for construction of the suspension bridge catwalk, high in safety, good in economical efficiency, high in applicability and capable of accurately adjusting the sag of the load-bearing cable.
本发明涉及桥梁施工技术领域，公开了一种大跨度悬索桥猫道不对称施工的承重索垂度调整方法，方法步骤包括如下：抗滑桩施工和锚固钢架预埋，塔顶锚固梁安装；猫道先导索过江，猫道主承重索安装，临时锚固在抗滑桩顶；利用猫道承重索作为轨索安装钢绞线，钢绞线两端锚固、张拉端设在抗滑桩顶；安装塔顶猫道主承重索锚固装置，猫道绳垂度调整按照由A岸边跨开始，向B岸边跨推进的原则进行；B岸塔顶锚固承重索，过程中根据塔偏情况调节拉力确保主塔竖直；猫道面层铺设，B岸锚碇及散索鞍施工完成，B岸边跨猫道承重索逐根由抗滑桩改换至鞍部与猫道锚固系统连接；B岸边跨猫道调索及面层铺装，过程中根据塔偏情况逐步卸载钢绞线拉力，预应力钢绞线完全卸载后即可拆除。该大跨度悬索桥猫道不对称施工的承重索垂度调整方法，适应于悬索桥猫道施工，安全性高，经济性好，适用性强，可以精确的调整承重索垂度。
Bearing cable sag adjusting method for asymmetric construction of large-span suspension bridge catwalk
一种大跨度悬索桥猫道不对称施工的承重索垂度调整方法
LI YUANYUAN (author) / RAN MAOHUI (author) / LEI LEI (author) / HUANG YOUPING (author) / MA YOULIANG (author) / YANG XIUGANG (author) / CHEN BIN (author) / ZHANG ZHENGNAN (author) / CHEN BO (author)
2024-04-09
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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