深基坑PCMW工法围护结构反分析研究与安全性评估
摘要:PCMW工法围护结构作为一种新型支护形式，已在基坑支护工程中得到应用。结合南京某基坑工程实例，根据现场测斜数据，通过最小二乘法对变形曲线拟合，反演计算得到管桩弯矩值，进而对该支护形式进行安全性评估，验证其用于基坑工程的可行性。结果表明：最小二乘法拟合曲线多项式次数最优为6次，反分析求得的弯矩在基坑中部能很好地反映围护结构的实际弯矩；支护桩自身内力发挥程度较小，安全余量较大，PCMW工法围护结构安全。
Abstract:PCMW engineering method is a new support form and has been applied in foundation pit engineering. On basis of situ inclinometer data measured from an excavation case in Nanjing, the deformation curve is fitted by the least squares method, and bending moment value of pipe pile is obtained through inversion calculation. Then security of the supporting form is assessed and its feasibility is verified for foundation pit engineering. The results show that the polynomial optimal times for the least squares fitting curve is 6 times and the bending moment obtained by back analysis can well reflect the actual moment of the retaining structure in middle depth of the foundation pit. The internal forces of supporting pile play a low degree, so safety margin is large. It is concluded that PCMW engineering method on retaining structure is safe.
中文标题：
深基坑PCMW工法围护结构反分析研究与安全性评估
Back Analysis Research and Security Assessment of PCMW Engineering Method on Retaining Structure of Deep Foundation
作者：
王九红1,范钦建2
Wang Jiuhong1,Fan Qinjian2
作者简介:王九红,1980年生,女,汉族,江苏盐城人,硕士,高级工程师,注册土木工程师(岩土),从事岩土工程勘察与设计エ作。E-mail:wangzhi5299@sina.com
通讯地址：
1. 江苏城乡建设职业学院, 江苏常州 213147; 2. 中亿丰建设集团设计研究院有限公司, 江苏常州 215008
1.JiangsuUrbanandRuralConstructionCollege,Changzhou213147,Jiangsu,China; 2.ZYFConstructionGroupDesign&ResearchInstituteCo.,Ltd,Suzhou215008,Jiangsu,China
中图分类号:TU472.3
doi:10.3969/j.issn.1007-2993.2015.02.007
出版物：岩土工程技术
收稿日期:2014-10-30
网络出版日期:2021-07-19
关键词:PCMW工法,曲线拟合,反演分析,安全性评估
Key words:PCMW engineering method,curve fitting,back analysis,security assessment
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