應用研究 2025年 第卷 第18期
DOI: 10.7672 / sgjs2025180082
鋼絞線斜拉索群錨夾片整體頂壓施工技術
唐棟梁，阮澤蓮，伍先友
作者簡介：
唐棟梁，項目總工程師，高級工程師， E-mail:195407395@ qq. com作者單位：
中交二航局第二工程有限公司，重慶 401120基金項目：
?中交二航局科技立項課題：高低塔、鋼絞線拉索、疊合梁斜拉橋主梁施工控制研究（EHYF-2023-B-032）摘要：
斜拉橋鋼絞線拉索單根掛索并初張拉完成后，在二次張拉要求整體張拉時，往往存在群錨夾片后退距離不夠刮傷防腐涂層的情形，在二次張拉完成鋼絞線回縮時，往往存在兩瓣式工作夾片不能同步回縮甚至出現錯位情形，這就導致低應力狀態下的鋼絞線斜拉索的錨固性能驟然降低，給大橋安全帶來較大隱患。以四川省瀘州市榕山長江大橋為例，介紹一種能整體頂壓鋼絞線斜拉索群錨夾片前移的新型液壓裝置，該裝置設置在限位板與整體張拉千斤頂之間，其頂升活塞能帶動其前端的頂壓頭組整體前移，頂壓頭組為空心管結構，當其穿過限位板眼孔后，可將工作夾片整體頂入工作錨錐孔內，可有效解決前述錨固隱患問題。
English：
After the single strand hanging and initial tensioning of the steel strand cables of a cable-stayedbridge are completed, there is often a situation where the anchor clips of group anchorage do not haveenough retreat distance during the overall tensioning in the secondary tensioning,which can scratch theanti-corrosion coating. During the completion of the second tensioning,when the steel strand retracts,there is often a situation where the two-leaf working anchor clips can not retract synchronously or evenbecome misaligned. This leads to a sudden decrease in the anchoring performance of the steel strandcables under low stress, posing a significant safety hazard to the bridge. Taking the cable construction ofthe Rongshan Yangtze River Bridge in Luzhou, Sichuan Province as an example, this paper introduces anew type of hydraulic device that can collectively advance the anchor clips of the steel strand cables. Thisdevice is installed between the limit plate and the collective tensioning jack. Its lifting piston can drivethe entire front pressing head assembly to move forward. The pressing head assembly is a hollow tubestructure. After it passes through the eye hole of the limit plate, it can push the working anchor clips intothe working anchor cone hole as a whole, effectively resolving the aforementioned anchoring safetyhazards.