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以殴江北汊三塔两跨悬索桥为工程背景,对中塔采用全混凝土方案的可行性进行了研究。对人字形、I字形以及增加斜拉索的3种中塔方案进行了计算比较,从主缆抗滑移安全系数和塔底应力出发,总结出3种形式混凝土中塔的优缺点,否决了混凝土方案的可行性。对中塔的基础形式,研究比较了沉井基础与钻孔桩基础方案,对防撞设计作了分析研究。
Taking Beidouxiong three towers and two span suspension bridge as engineering background, the feasibility of adopting full concrete scheme in center tower was studied. Based on calculation and comparison of three medium tower schemes of herringbone, I-shape and additional stay cables, the advantages and disadvantages of three types of concrete towers are summarized based on the anti-slip safety factor of main cable and the bottom stress. Feasibility of concrete solutions. The basic form of the tower, the study compared the basis of caisson and bored pile foundation program, made an analysis of anti-collision design.