基于应力隔断理论的钢板桩防护在某工程中的应用
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摘要
软土地基堆填活动施工期的周边建筑物防护是工程建设中的常遇问题,国内常采用搅拌桩或旋喷桩加固周边地基进行防护,而基于应力隔断理论的钢板桩防护则运用较少,无论是工程经验还是理论研究都有所欠缺。文章介绍了应力隔断防护原理;引述了日本的钢板桩防护简易计算方法:采用弹塑性弹簧模型模拟桩土应力,竖向受力平衡确定钢板桩沉降;以某实际工程为例详细阐述钢板桩防护方案的计算及设计,可为类似工程提供有价值的参考。
The protection of surrounding buildings on soft ground during the banking construction is a common problem in engineering construction. The deep mixing columns and jet-grouting columns are the common countermeasures to reinforcing the surrounding foundation in domestic, but the steel sheet piles, based on the stress isolation theory, are not much used; both engineering experience and theoretical research are not enough. We introduced the principle of stress isolation, cited the simple calculation method of steel sheet pile protection in Japan, which is using elastic-plastic spring model to simulate the pile-soil stress and obtaining sheet pile's settlement from vertical force equilibrium. Taking a practical project as an example we expounded the calculation and design of steel sheet pile protection scheme, which can provide valuable reference for similar projects.
The protection of surrounding buildings on soft ground during the banking construction is a common problem in engineering construction. The deep mixing columns and jet-grouting columns are the common countermeasures to reinforcing the surrounding foundation in domestic, but the steel sheet piles, based on the stress isolation theory, are not much used; both engineering experience and theoretical research are not enough. We introduced the principle of stress isolation, cited the simple calculation method of steel sheet pile protection in Japan, which is using elastic-plastic spring model to simulate the pile-soil stress and obtaining sheet pile's settlement from vertical force equilibrium. Taking a practical project as an example we expounded the calculation and design of steel sheet pile protection scheme, which can provide valuable reference for similar projects.
引文
[1]王景芸,郑俊杰,彭劼,等.水泥搅拌桩在真空—堆载预压防护工程中的应用[C]//中国建筑学会地基基础分会2008年学术年会论文集.北京:知识出版社,2009:299-303.WANG Jing-yun,ZHENG Jun-jie,PENG Jie,et al.Application of cement deep mixed columns protection in vacuum-preloading project[C]//2008 annual conference proceedings of soil-foundation branch of The Architectural Society of China.Beijing:Knowledge Press,2009:299-303.
[2]吴晔晖.广州地铁五号线鱼珠车辆段软基处理方案及效果评价[J].广东土木与建筑,2010(12):60-61.WU Ye-hui.Scheme and effect evaluation of the soft ground treatment in Yuzhu depot in Guangzhou metro line 5[J].Guangdong Architecture Civil Engineering,2010(12):60-61.
[3]OCHIAI H,OTANI H,HARATA N,et al.Countermeasures against settlement of embankment on soft ground with PFS(Partial Floating Sheet-Pile)method[M]//Geotechnics of Soft Soils:Focus on Ground Improvement.CRC Press/Balkema,2008:345-351.
[4]OBASE K.Evaluation of the countermeasures for embankment on a soft ground:PFS method and ALi CC method(Prediction and countermeasures of consolidation settlement)[J].The Japanese Geotechnical Society,2008,56:18-21.
[5]ONDA kunihiko,TATSUTA Masataka,OKUDA Yoichi,et al.Development of new sheet-pile countermeasure method for soft ground No.3-A new design concept based on beam-spring model[J].The Japanese Geotechnical Society,2004:1 273-1 274.
[6]刘树勋.地基的变形模量E0和地基的反力系数K的求法[J].港工技术,1980(4):66-71.LIU Shu-xun.Calculation method for deformation modulus E0and subgrade reaction coefficients K[J].Port Engineering Technology,1980(4):66-71.
[7]JTS 167-3—2009,板桩码头设计与施工规范[S].JTS 167-3—2009,Code for design and construction for quay wall of sheet pile[S].
[8]Ports and Harbour Bureau,Ministry of Land,Infrastructure,Transport and Tourism(MLIT).Technical standards and commentaries for port and harbour facilities in Japan[M].Tokyo,Japan:The Overareas Coastal Area Development Institute of Japan,2009:726.
[2]吴晔晖.广州地铁五号线鱼珠车辆段软基处理方案及效果评价[J].广东土木与建筑,2010(12):60-61.WU Ye-hui.Scheme and effect evaluation of the soft ground treatment in Yuzhu depot in Guangzhou metro line 5[J].Guangdong Architecture Civil Engineering,2010(12):60-61.
[3]OCHIAI H,OTANI H,HARATA N,et al.Countermeasures against settlement of embankment on soft ground with PFS(Partial Floating Sheet-Pile)method[M]//Geotechnics of Soft Soils:Focus on Ground Improvement.CRC Press/Balkema,2008:345-351.
[4]OBASE K.Evaluation of the countermeasures for embankment on a soft ground:PFS method and ALi CC method(Prediction and countermeasures of consolidation settlement)[J].The Japanese Geotechnical Society,2008,56:18-21.
[5]ONDA kunihiko,TATSUTA Masataka,OKUDA Yoichi,et al.Development of new sheet-pile countermeasure method for soft ground No.3-A new design concept based on beam-spring model[J].The Japanese Geotechnical Society,2004:1 273-1 274.
[6]刘树勋.地基的变形模量E0和地基的反力系数K的求法[J].港工技术,1980(4):66-71.LIU Shu-xun.Calculation method for deformation modulus E0and subgrade reaction coefficients K[J].Port Engineering Technology,1980(4):66-71.
[7]JTS 167-3—2009,板桩码头设计与施工规范[S].JTS 167-3—2009,Code for design and construction for quay wall of sheet pile[S].
[8]Ports and Harbour Bureau,Ministry of Land,Infrastructure,Transport and Tourism(MLIT).Technical standards and commentaries for port and harbour facilities in Japan[M].Tokyo,Japan:The Overareas Coastal Area Development Institute of Japan,2009:726.