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            深厚軟土覆蓋層離岸海中錨碇圍堰筑島結構設計*
            • 作者: 萬猛,劉建波,楊蘇海,等
            論文摘要

            深厚軟土覆蓋層離岸海中錨碇圍堰筑島結構設計*

            萬猛1,2,3,劉建波1,2,3,楊蘇海1,2,3,吳啟和1,2,3 

            (1.中交第二航務工程局有限公司,湖北 武漢 430014; 2.長大橋梁建設施工技術交通行業重點實驗室,湖北 武漢 430014; 3.交通運輸行業交通基礎設施智能制造技術研發中心,湖北 武漢 430014)

            [摘要]深中通道伶仃洋大橋為三跨全漂浮體系鋼箱梁懸索橋,東錨碇基礎采用“∞”形地下連續墻支護結構,地下連續墻施工采用鎖扣鋼管樁與工字形板樁組合圓形圍堰筑島總體方案。軟基處理采用“水下開挖清淤+水下塑料排水板+砂石墊層”排水固結方案;圍堰外側設置平行鋼絲索柔性圍箍結構對圍堰結構進行環向約束,實現鋼管樁與圍箍結構的協調變形;圍堰外側采用水下模袋砂/模袋混凝土組合防護結構,兼顧筑島圍堰沖刷和回填土體造成軟土擠淤的影響。

            [關鍵詞]懸索橋;錨碇;圍堰筑島;結構設計;排水固結;模袋混凝土

            [中圖分類號]TU753    [文獻標識碼]A    [文章編號]1002-8498(2021)19-0092-05

            Structural Design of Offshore Underwater Anchor Cofferdam Artificial Island with Thick Soft Soil Overburden

            WAN Meng1,2,3, LIU Jianbo1,2,3, YANG Suhai1,2,3, WU Qihe1,2,3 

            (1.CCCC Second Harbour Engineering Company, Wuhan, Hubei 430014, China; 2.Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure, Wuhan, Hubei 430014, China; 3.Key Laboratory of Large span Bridge Construction Technology, Wuhan, Hubei 430014, China)

            Abstract: The Lingdingyang Bridge of Shenzhen Zhongshan Link is a steel box girder suspension bridge with three spans full floating. The east anchor foundation design uses the  shaped underground diaphragm wall, and a interlocked steel piles and I shaped steel sheet piles combined cofferdam artificial island was built to meet the requirements of construction on land. The soft soil settlement of the artificial island uses the drainage consolidation scheme, includes the river bed dredging, underwater plastic drainage plate and placement of sand gravel cushion. The parallel wire rope hoop structure is set to hoop constraint the cofferdam, which can realize the coordinated deformation of steel piles and hoop structure. The outside of the cofferdam uses the underwater sand bags and the mold bag concrete combined scour protection structure, which can balance the scour and the effect of the artificial island backfills.

            Keywords:suspension bridge;anchor;cofferdam artificial island;structural design;drainage consolidation;mold bag concrete

            中文基金項目*

            中交集團重大科技研發項目:深中通道懸索橋海上特大錨碇建造關鍵技術研究(2018-ZJKJ-03

            [作者簡介]萬猛,工程師,Emailwanmeng@zju.edu.cn

             

            主辦單位:亞太建設科技信息研究院有限公司 中國建筑集團有限公司 中國土木工程學會    承辦單位:施工技術傳媒機構
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