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地铁施工方案对邻近桥基的沉降影响优化分析 被引量:4
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作者 吴波 刘维宁 +1 位作者 索晓明 史玉新 《地下空间与工程学报》 CSCD 2006年第3期434-437,共4页
针对国贸站西北和东北风道施工对近邻桥基沉降影响这一实际工程问题,运用ABAQUS软件,建立了两个风道施工过程中桩-土相互作用模型,在对施工过程进行动态模拟的同时,重点分析了不同施工方案对桥基绝对沉降和差异沉降的影响程度,并提出了... 针对国贸站西北和东北风道施工对近邻桥基沉降影响这一实际工程问题,运用ABAQUS软件,建立了两个风道施工过程中桩-土相互作用模型,在对施工过程进行动态模拟的同时,重点分析了不同施工方案对桥基绝对沉降和差异沉降的影响程度,并提出了优化的施工方案。研究表明,东北风道和西北风道不同的施工路径对桥基的沉降值影响不明显,但对桥基的差异沉降影响较为显著,从而表明,施工方案的优化是非常必要的,对该工程施工过程中为保障近邻桥基的安全提供了依据和指导作用。 展开更多
关键词 地铁施工 方案优化 桥基沉降 ABAQUS软件
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Long-term settlement prediction of high-speed railway bridge pile foundation 被引量:4
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作者 杨奇 冷伍明 +4 位作者 张升 聂如松 魏丽敏 赵春彦 刘维正 《Journal of Central South University》 SCIE EI CAS 2014年第6期2415-2424,共10页
The process and characteristics of loading on high-speed railway bridge pile foundation were firstly obtained by means of field research and analysis,and the corresponding loading function was presented.One-dimensiona... The process and characteristics of loading on high-speed railway bridge pile foundation were firstly obtained by means of field research and analysis,and the corresponding loading function was presented.One-dimensional consolidation equation of elastic multilayered soils was then established with single drainage or double drainages under multilevel loading.Moreover,the formulas for calculating effective stress and settlement were derived from the Laplace numerical inversion transform.The three-dimensional composite analysis method of bridge pile group was improved,where the actual load conditions of pile foundation could be simulated,and the consolidation characteristics of soil layers beneath pile were also taken into account.Eventually,a corresponding program named LTPGS was developed to improve the calculation efficiency.The comparison between long-term settlement obtained from the proposed method and the in-situ measurements of pile foundation was illustrated,and a close agreement is obtained.The error between computed and measured results is less than 1 mm,and it gradually reduces with time.It is shown that the proposed method can effectively simulate the long-term settlement of pile foundation and program LTPGS can provide a reliable estimation. 展开更多
关键词 bridge pile foundation long-term settlement CONSOLIDATION Laplace numerical inversion transform multilevel loading multilayered soils
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A computational method for post-construction settlement of high-speed railway bridge pile foundation considering soil creep effect 被引量:12
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作者 冯胜洋 魏丽敏 +1 位作者 何重阳 何群 《Journal of Central South University》 SCIE EI CAS 2014年第7期2921-2927,共7页
Based on reasonable assumptions that simplified the calculational model,a simple and practical method was proposed to calculate the post-construction settlement of high-speed railway bridge pile foundation by using th... Based on reasonable assumptions that simplified the calculational model,a simple and practical method was proposed to calculate the post-construction settlement of high-speed railway bridge pile foundation by using the Mesri creep model to describe the soil characteristics and the Mindlin-Geddes method considering pile diameter to calculate the vertical additional stress of pile bottom.A program named CPPS was designed for this method to calculate the post-construction settlement of a high-speed railway bridge pile foundation.The result indicates that the post-construction settlement in 100 years meets the requirements of the engineering specifications,and in the first two decades,the post-construction settlement is about 80% of its total settlement,while the settlement in the rest eighty years tends to be stable.Compared with the measured settlement after laying railway tracks,the calculational result is closed to that of the measured,and the results are conservative with a high computational accuracy.It is noted that the method can be used to calculate the post-construction settlement for the preliminary design of high-speed railway bridge pile foundation. 展开更多
关键词 high-speed railway bridge pile foundation post-construction settlement Mesri creep model simplified computational method
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Finite element analysis on impact of foundation treatment in bridgehead transition section upon bridge piles
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作者 ZHENG Wei DU Lizhi WANG Yong 《Global Geology》 2011年第4期254-258,共5页
In order to decrease relative settlement, foundation treatment plays an extremely important role in bridgehead transition section, especially, the situation of building the bridge piles firstly, and then processing pi... In order to decrease relative settlement, foundation treatment plays an extremely important role in bridgehead transition section, especially, the situation of building the bridge piles firstly, and then processing piles. On the basis of engineering practice, the authors analyzed the influence of foundation treatment on bridge piles in bridgehead transition section by finite-element method (FEM). This research has positive significance in predicting displacement of bridge pile, directing construction of foundation treatment, and improving quality of engineering and so forth. 展开更多
关键词 foundation treatment finite element analysis bridge pile bridgehead transition section
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