应力释放孔减小预制桩挤土效应的应用研究
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摘要
为探索有效防治软土地区沉桩时挤土效应对周边环境造成不良影响的方法,通过在某教学训练馆A(副馆)桩基施工时设置应力释放孔,结合理论计算及现场监测周边建筑的累计沉降、位移的方法,观测到设置应力释放孔后土体在水平及竖向的位移均会大幅度减小,同时周围环境未遭受到破坏。结果表明,采用应力释放孔的措施能够有效地解决挤土效应问题,为防治深厚软土层地区预制桩挤土效应提供一些参考。
In order to explore ways to effectively prevent and control the squeez effect in soft soil areas on the surrounding environment. By setting up the relief holes in the construction of pile foundation in the teaching and training hall A( secondary building) and combining with the theoretical calculation and on-site monitoring of accumulated settlement and displacement of surrounding buildings,it is observed that the horizontal and vertical displacements of the soil will be greatly reduced after setting up the stress release holes and the surrounding environment is not damaged. The results show that the measures of relief holes can effectively solve the problem of squeez effect in soft soil areas and provide some reference for the prevention and control of the prefabricated pile effect in deep soft soil layer.
In order to explore ways to effectively prevent and control the squeez effect in soft soil areas on the surrounding environment. By setting up the relief holes in the construction of pile foundation in the teaching and training hall A( secondary building) and combining with the theoretical calculation and on-site monitoring of accumulated settlement and displacement of surrounding buildings,it is observed that the horizontal and vertical displacements of the soil will be greatly reduced after setting up the stress release holes and the surrounding environment is not damaged. The results show that the measures of relief holes can effectively solve the problem of squeez effect in soft soil areas and provide some reference for the prevention and control of the prefabricated pile effect in deep soft soil layer.
引文
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俞翔. 2012.管桩桩基工程中应力释放孔的设计及应用[J].山西建筑,38(18):86-87.
周云东,杨寿松. 2005.现浇薄壁管桩复合地基非线性有限元分析[J].东华理工学院学报,28(3):234-238.
高华喜,黄喜玲,刘成乐,等. 2006.杭州市地质灾害危险性分析[J].东华理工学院学报,27(4):350-354.
李晓明,殷建武,施俊生,等. 2004.桩-土荷载传递机理的试验研究[J].东华理工学院学报,29(3):249-252.
李雪峰. 2013.应力释放孔在管桩桩基工程中的应用[J].山西建筑,39(14):63-64.
吕淼木. 2013.浅谈预应力管桩的“挤土”效应危害及防治[J].福建建材,(10):43-44.
沈欣,刘明发. 2009.应力释放孔的应用实践[J].工程技术,89(10):75.
施瑾. 2015.应力释放孔在预制桩桩基工程中的应用及分析[J].山西建筑,41(8):86-87.
屠海青,郭志业. 2004.静压管桩挤土效应的防治措施[J].浙江建筑,21(2):22-24.
王冲,李巨龙,罗开艳,等. 2012.应力释放孔对静压桩沉桩挤土效应的影响研究[J].建筑科学,28(5):34-37.
俞翔. 2012.管桩桩基工程中应力释放孔的设计及应用[J].山西建筑,38(18):86-87.
周云东,杨寿松. 2005.现浇薄壁管桩复合地基非线性有限元分析[J].东华理工学院学报,28(3):234-238.