深基坑桩锚支护体系的受力变形研究及优化设计
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摘要
桩锚支护体系是近年来随着基坑工程的发展而发展起来的一种新型支护结构,因其工程适用性强而被广泛地运用于岩土工程施工中。但是目前有关基坑桩锚支护体系的理论研究往往无法满足现场施工技术的改进,很多以诸多假定为前提的计算模型并不能真实地反映基坑桩锚支护结构与土层之间的关系,以及桩锚支护体系本身的受力和变形特征等。本文以武汉市东湖春树里基坑支护工程项目为例,对该工程深基坑桩锚支护体系的结构受力及变形状况进行了ANSYS有限元数值模拟和分析,同时运用混合遗传算法研究分析了基坑支护相关的参数和约束条件,并对该基坑桩锚支护体系的结构进行了优化设计。
Anchor pile support system is a kind of new supporting structure that has risen in recent years and it is widely used due to its strong adaptability.However,the relevant theories cannot meet the improvement of on-site construction technology,and the calculation models based on hypotheses cannot reflect the relationship between the pile anchor support system and soil,and the characteristics of the stress and deformation of the system.Taking a typical foundation support project of Chunshuli in Wuhan City as an example,this paper analyzes the structure and characteristics of the pile anchor support system of deep foundation,makes the ANSYS simulation for the stress and deformation of the system,studies the parameters and constraints of the system by genetic algorithm,and optimizes the design of its structure.
Anchor pile support system is a kind of new supporting structure that has risen in recent years and it is widely used due to its strong adaptability.However,the relevant theories cannot meet the improvement of on-site construction technology,and the calculation models based on hypotheses cannot reflect the relationship between the pile anchor support system and soil,and the characteristics of the stress and deformation of the system.Taking a typical foundation support project of Chunshuli in Wuhan City as an example,this paper analyzes the structure and characteristics of the pile anchor support system of deep foundation,makes the ANSYS simulation for the stress and deformation of the system,studies the parameters and constraints of the system by genetic algorithm,and optimizes the design of its structure.
引文
[1]李好.深基坑桩锚支护弹塑性有限元分析[D].长沙:湖南大学,硕士学位论文,2004.
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[4]朱建新,付玉华,张耀平.排桩一单支撑支护结构优化设计及应用[J].南方冶金学院学报,2004,25(1):58-61.
[5]胡毓达.实用多目标最优化[M].上海:上海科学技术出版社,1990:182-185.
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[7]胡敏云.深基坑排桩支护结构设计研究[D].成都:西南交通大学,硕士学位论文,1998.
[8]周东.基坑支护工程遗传优化设计研究[D].南宁:广西大学,硕士学位论文,2002.
[2]卢肇均,吴肖茗,张肇坤.锚杆技术及其应用[A].铁道科学研究院论文集[C].北京:1985.
[3]王光彬.深基坑土钉支护施工过程及地震荷载作用下的有限元分析[D].兰州:兰州理工大学,硕士学位论文,2006.
[4]朱建新,付玉华,张耀平.排桩一单支撑支护结构优化设计及应用[J].南方冶金学院学报,2004,25(1):58-61.
[5]胡毓达.实用多目标最优化[M].上海:上海科学技术出版社,1990:182-185.
[6]黄强,崔永宁.深基坑支护工程实例集[M].北京:中国建筑工业出版社,1997:1-16.
[7]胡敏云.深基坑排桩支护结构设计研究[D].成都:西南交通大学,硕士学位论文,1998.
[8]周东.基坑支护工程遗传优化设计研究[D].南宁:广西大学,硕士学位论文,2002.
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