莫桑比克马普托大桥锚碇基础方案比选

发布时间：2018-01-11 20:36

本文关键词：莫桑比克马普托大桥锚碇基础方案比选　出处：《世界桥梁》2014年06期 　论文类型：期刊论文

【摘要】：莫桑比克马普托(Maputo)大桥主桥为单跨680m悬索桥,为确定马普托大桥锚碇基础方案,依据大桥桥位处的地质和水文情况,以及重力式锚碇的结构受力特点,针对锚碇基础基底持力层选择、施工工艺的适用性、技术可行性、经济性、合理性,分别对沉井基础和地下连续墙基础进行研究。研究结果表明:采用地下连续墙基础,施工期间可以避免由于地质情况变化带来的风险,如翻砂、突涌等;可以严格控制锚碇基础施工过程中对周围土体造成的沉降,最大限度地减少对周围铁路正常运营的影响。在确定地下连续墙基础形式后,针对施工过程中的突涌问题,对深地下连续墙和浅地下连续墙+灌浆帷幕+深井抽排水降低水头方案进行研究。研究结果表明:采用深地下连续墙基础,投入设备相对单一,施工工艺、工序简单,施工工效相对较高,施工工期较短,工期可控,应为马普托大桥合理的锚碇基础方案。
[Abstract]:Mozambique, Maputo (Maputo) 680m bridge is a single span suspension bridge, in order to determine the anchorage foundation scheme of Maputo bridge, according to the geological and hydrological conditions at the bridge, and the structure of the gravity anchorage force characteristics for anchorage foundation bearing layer selection, applicability, construction technology feasibility, economy, rationality, respectively to study the caisson foundation and underground continuous wall foundation. The results show that the diaphragm wall foundation during construction, to avoid the risk, bring geological conditions change such as sand, water gushing; can strictly control the subsidence caused by the surrounding soil anchor foundation in the construction process, the maximum minimize the impact on the surrounding normal railway operation. Based on the form of underground continuous wall, the construction process of the water inrush problem of deep underground continuous wall and underground continuous wall and grout curtain The curtain and deep pumping and drainage research to reduce head scheme. The results show that the deep underground continuous wall foundation, the equipment investment is relatively simple, the construction process, the process is simple, relatively high construction efficiency, short construction period, construction period should be controlled, the anchorage foundation scheme of Maputo bridge is reasonable.

【作者单位】：中国路桥工程有限责任公司;
【分类号】：U448.25
【正文快照】： 1工程概况莫桑比克马普托(Maputo)大桥跨越马普托海湾,位于莫桑比克首都马普托市向南去往南非与莫桑比克南部卡萨通商(Casa Commercial)边界口岸的干线公路上。大桥全长3.011km,其中主桥为单跨680m的悬索桥(见图1)。主缆垂跨比为1/10。主桥加劲梁采用正交异性板流线型扁平钢箱

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