岳阳洞庭湖大桥葫芦形锚碇基坑施工监测方案及受力特性研究

发布时间：2018-04-04 23:31

  本文选题：葫芦形　切入点：锚碇基坑　出处：《公路工程》2017年01期

【摘要】：针对岳阳洞庭湖大桥锚碇葫芦形基坑的几何特点,合理布置监测点,并确定各监测项目的监测频率与预警值。结合现场监测数据,探讨了围护结构深层水平位移、墙体钢筋应力和墙顶变形等实测值的变化规律。分析表明:葫芦形地下连续墙单圆直径比圆形地连墙小,可较好发挥圆拱效应;中部的中隔墙提高了地连墙的局部刚度,减小了中部的位移量;葫芦形地下连续墙的侧向位移呈明显的"S"形变化。由实测结果分析可知,葫芦形地连墙整体设计方案合理,效果良好,内力与变形均可满足规范要求。
[Abstract]:According to the geometric characteristics of the hoist shaped foundation pit of the Dongting Lake Bridge in Yueyang, the monitoring points are reasonably arranged, and the monitoring frequency and early warning value of each monitoring project are determined.Based on the field monitoring data, the variation rules of measured values such as deep horizontal displacement, stress of wall reinforcement and deformation of roof of wall are discussed.The analysis shows that the single circle diameter of the hoist diaphragm wall is smaller than that of the circular ground connecting wall, and the circular arch effect can be better brought into play, and the local stiffness of the ground connecting wall is improved and the displacement of the middle part of the wall is reduced by the middle partition wall.The lateral displacement of the hyacinth diaphragm wall shows obvious "S" shape change.From the analysis of the measured results, it can be seen that the overall design scheme of the hoist earth connecting wall is reasonable, the effect is good, and the internal force and deformation can meet the requirements of the code.
【作者单位】： 长沙理工大学土木与建筑学院;珠海市规划设计研究院;湖南省交通规划勘察设计院;
【基金】：交通运输部建设科技项目资助(2013318798320)
【分类号】：U445.55
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本文编号：1712211