鹦鹉洲长江大桥北锚碇沉井下沉稳定性分析

发布时间：2018-01-16 17:14

本文关键词：鹦鹉洲长江大桥北锚碇沉井下沉稳定性分析　出处：《科学技术与工程》2017年28期 　论文类型：期刊论文

【摘要】：基于可靠度理论,通过对基桩极限状态方程的分析,得到了基桩极限承载力影响因素。将这一理论运用到大型锚碇沉井下沉施工的稳定性之中,得到了衡量沉井下沉稳定性的3个指标,抗滑动稳定系数,抗倾覆稳定安全系数和下沉稳定系数。通过对鹦鹉洲长江大桥北锚碇沉井不同工况,不同接高阶段、不同下沉阶段中下沉稳定系数的分析可知:同一工况、同一下沉周期内,随着接高次数的增加,稳定系数逐渐增大;同一工况下,稳定系数随着下沉次数的增多而逐渐减小;不同工况中,全截面稳定系数最低。在今后类似锚碇沉井的下沉施工中可采用下沉稳定系数对沉井下沉稳定性加以分析控制。
[Abstract]:Based on the reliability theory and the analysis of the ultimate state equation of foundation pile, the influencing factors of ultimate bearing capacity of foundation pile are obtained, which is applied to the stability of sinking construction of large Anchorage caisson. Three indexes are obtained to measure the sinking stability of the caisson, the stability coefficient of anti-sliding, the factor of stability against overturning and the coefficient of stability of sinking. Through the different working conditions of the North Anchorage caisson of Paraozhou Yangtze River Bridge, different stages of connecting height are obtained. The analysis of the stability coefficient in different subsidence stages shows that the stability coefficient increases gradually with the increase of the number of times of connection in the same working condition and the same subsidence period; Under the same working condition, the stability coefficient decreases with the increase of sinking times. The stability coefficient of the whole section is the lowest in different working conditions, and the stability of the caisson can be analyzed and controlled by using the coefficient of stability in the sinking construction of similar Anchorage caisson in the future.
【作者单位】：湖北工业大学土木建筑与环境学院;
【分类号】：U445.557
【正文快照】： 悬索桥以其优良的跨越能力、美观的造型在交通运输业需求量与日俱增的今天备受青睐。锚碇作为悬索桥主缆的锚固体,承担着将主缆中斜向索拉力传递给地基基础的重任。目前锚碇基础形式包括沉井(箱)基础、地下连续墙基础、群桩基础等人工基础和锚体直接作用在持力层上的直接基础[

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