论文部分内容阅读
马鞍山长江公路大桥左汊主桥采用2×1 080m三塔两跨悬索桥方案。南锚位于江心洲上,场区覆盖层厚,合理的持力层圆砾土层埋深约50m。根据对地质的适应性,选择沉井基础方案和根式锚碇基础方案进行比选。沉井方案结合地质条件以及受力情况选择了合理的持力层,并考虑施工下沉的要求对结构进行了优化设计;根式基础方案为一种新型结构,通过现场的试验,提出了有效的简化计算方法及施工工艺。综合两个方案的优缺点,经比选,采用相对成熟的沉井基础作为南锚碇的最终实施方案。
Ma’anshan Changjiang Road Bridge left main bridge using 2 × 1 080m three towers and two span suspension bridge program. South anchor is located in the heart of the island, the field cover thick, reasonable bearing layer of gravel layer buried depth of about 50m. According to the adaptability to the geology, the selection of the basic scheme of caisson and the basic scheme of root caving are compared and selected. According to the geological conditions and the stress conditions, the caisson plan selects a reasonable bearing layer and optimizes the structure in consideration of the requirement of construction sinking. The radical foundation plan is a new type of structure. Based on the field tests, an effective Simplify the calculation method and construction process. Based on the advantages and disadvantages of the two schemes, the relatively mature caisson foundation is selected as the final implementation plan of South Anchorage.