深基坑支护桩水平位移影响因素数值模拟研究
Numerical Simulation of Factors Affecting Horizontal Displacement of Supporting Piles in Deep Foundation Pit
朱筱博1
作者信息
- 1. 中国建筑材料工业地质勘查中心河南总队,河南 信阳 464000
- 折叠
摘要
为分析不同影响因素对支护结构水平位移的影响,文中利用有限元模拟法建立基坑模型,研究支护结构水平位移与桩身深度关系随温度、内摩擦角以及桩身混凝土强度的变化规律.结果表明,随着桩身深度的增加,支护桩的水平位移不断降低.温度每增加1℃,桩身水平位移降低0.16 mm;土层内摩擦角每增加1°,桩身水平位移降低0.68 mm;桩身混凝土弹性模量每增加1 kPa,桩身水平位移降低3 mm;桩身混凝土弹性模量的变化对桩身水平位移的约束程度最大,设计支护结构时,应在经济条件允许的范围内采用高性能桩身混凝土.
Abstract
In order to analyze the influence of different influencing factors on the horizontal displacement of supporting structure,the finite ele-ment simulation method is used to establish a foundation pit model and study the relationship between the horizontal displacement of supporting structure and the depth of pile with temperature,internal friction Angle and the strength of pile concrete.The results show that the horizontal displacement of supporting piles decreases with the increase of pile depth.When the temperature increases by 1℃,the horizontal displacement of pile body decreases by 0.16 mm.When the friction Angle in soil layer increases by 1°,the horizontal displacement of pile body decreases by 0.68 mm.When the elastic modulus of pile concrete increases by 1 kPa,the horizontal displacement of pile body decreases by 3 mm.The change of elastic modulus of pile concrete has the greatest constraint on the horizontal displacement of pile,and high performance pile concrete should be used in the design of supporting structure within the scope of economic conditions.
关键词
基坑工程/支护桩/数值模拟/影响因素/水平位移Key words
Foundation pit engineering/Supporting pile/Numerical simulation/Influencing factors/Horizontal displacement引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据