深圳后海湾填海区软土地基处理技术研究
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摘要
随着深圳地区经济的快速发展和人口的逐渐增加,人们对土地的需求越来越大,加上深圳地区独特的工程地质条件,使得在深圳地区的各项工程中经常需要对大面积软土地基进行加固处理。因此,深圳后海湾填海区软土地基处理技术研究对滨海地区的城市建设具有重要的现实意义。
论文首先对深圳后海湾填海区软土的工程性质进行了分析、根据其工程性质提出了适合于该区域的5种常用软土地基处理方法,并对其加固机理、适用范围及施工工艺进行了总结分析。
接着提出了软土地基处理方案的多属性模糊决策方法。从多属性模糊决策基本理论出发,根据软土地基处理方案的本身特点,选取治理可靠性、工程造价、施工工期、对环境的影响等四个指标建立了软土地基处理方案优选的评价体系,采用专家评分法确定评价指标的权重,构造出适合于软土地基方案优选的模糊多属性决策与评价模型,并运用该模型结合实际工程经验对深圳后海湾填海区软土地基处理方案进行了优选,优选结果与实际工程选用方案一致。
最后对深圳后海湾填海区软土地基处理的监测技术相关方面进行了分析探讨,提出软土地基监测应采用综合监测技术,即根据软土地基地层的实际情况来合理的选择监测项目,且采用多个监测项目的成果对软土地基处理效果进行相互验证。
With the rapid development of economy and population in Shenzhen area, the requirement for the land becomes larger and larger. The large areas of soft foundation need reinforcement in each engineering project of Shenzhen region, due to typical geological situation there. So the study on foundation treatment and monitor technique to large area of soft soil foundation is very important to urban construction and has its important realistic meaning in the coastal region.
The engineering characteristic of the sea filling soft soil in Houhai bay of Shenzhen is studied. And according to engineering characteristic, five normal dealing methods for the foundation are proposed, which are suitable for this region, while their reinforcement mechanism is analyzed as well as the applicability and the construction techniques.
The fuzzy decision-making method for multi-objectives to foundation treatment scheme of soft soil is proposed. Based on the fuzzy decision-making theory for multi-objective system, the characteristics of foundation treatment scheme of soft soil were analyzed. From four aspects of reliability, construction promptness, construction time limit, and environmental influence, the index system for evaluating the project design was established for foundation treatment scheme of soft soil. Used the expert investigation to decide the weight for evaluation index, the optimum decision-making and evaluation model was deduced from fuzzy decision-making theory for multi-objective system. Its application in the actual engineering was proved to gain superior decision result.
At last, the studies on the monitoring technique to the foundation of sea filling soft soil in Houhai bay of Shenzhen region are done to propose the comprehensive monitoring technique, in which, the suitable monitoring technique is chosen according to the real situation of soft soil foundation, while several monitoring projects results to the soft soil foundation are used to validate the monitoring techniques.
论文首先对深圳后海湾填海区软土的工程性质进行了分析、根据其工程性质提出了适合于该区域的5种常用软土地基处理方法,并对其加固机理、适用范围及施工工艺进行了总结分析。
接着提出了软土地基处理方案的多属性模糊决策方法。从多属性模糊决策基本理论出发,根据软土地基处理方案的本身特点,选取治理可靠性、工程造价、施工工期、对环境的影响等四个指标建立了软土地基处理方案优选的评价体系,采用专家评分法确定评价指标的权重,构造出适合于软土地基方案优选的模糊多属性决策与评价模型,并运用该模型结合实际工程经验对深圳后海湾填海区软土地基处理方案进行了优选,优选结果与实际工程选用方案一致。
最后对深圳后海湾填海区软土地基处理的监测技术相关方面进行了分析探讨,提出软土地基监测应采用综合监测技术,即根据软土地基地层的实际情况来合理的选择监测项目,且采用多个监测项目的成果对软土地基处理效果进行相互验证。
With the rapid development of economy and population in Shenzhen area, the requirement for the land becomes larger and larger. The large areas of soft foundation need reinforcement in each engineering project of Shenzhen region, due to typical geological situation there. So the study on foundation treatment and monitor technique to large area of soft soil foundation is very important to urban construction and has its important realistic meaning in the coastal region.
The engineering characteristic of the sea filling soft soil in Houhai bay of Shenzhen is studied. And according to engineering characteristic, five normal dealing methods for the foundation are proposed, which are suitable for this region, while their reinforcement mechanism is analyzed as well as the applicability and the construction techniques.
The fuzzy decision-making method for multi-objectives to foundation treatment scheme of soft soil is proposed. Based on the fuzzy decision-making theory for multi-objective system, the characteristics of foundation treatment scheme of soft soil were analyzed. From four aspects of reliability, construction promptness, construction time limit, and environmental influence, the index system for evaluating the project design was established for foundation treatment scheme of soft soil. Used the expert investigation to decide the weight for evaluation index, the optimum decision-making and evaluation model was deduced from fuzzy decision-making theory for multi-objective system. Its application in the actual engineering was proved to gain superior decision result.
At last, the studies on the monitoring technique to the foundation of sea filling soft soil in Houhai bay of Shenzhen region are done to propose the comprehensive monitoring technique, in which, the suitable monitoring technique is chosen according to the real situation of soft soil foundation, while several monitoring projects results to the soft soil foundation are used to validate the monitoring techniques.
引文
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[4]黄文熙,土的工程性质[M],北京;水利电力出版让,1983
[5]沈珠江,软土工程特性和软土地基设计[J],岩土工程学报,1998,20(1),99-111
[6]周龙翔、童华炜等,广州软土的工程特性及地基处理方法的对比研究[J],北京交通大学学报,2006,30(2),17-20
[7]Kuhn Matthew R,Mitchell James K.New perspectives on soil creep[J].Journal of Geotechnical Engineering,1993,119(3):507-524
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[13]龚晓南.地基处理技术发展与展望[M].北京:中国水利水电出版社,2004
[14]《地基处理手册》编写委员会.地基处理手册[M].北京:中国建筑工业出版社,1988
[15]孙更生,郑大同.软土地基与地下工程[M].北京:中国建筑工业出版社,1984
[16]史佩栋,陈环.石灰桩加固软基技术现状与展望[J].岩土工程界,1994,(2):12-20
[17]袁内镇.石灰桩浅层加固地基的应用与发展[J].适用技术市场,1989,(10):8-10
[18]叶书麟,韩杰,叶观宝等.地基处理与托换技术[M].北京:中国建筑工业出版社,1997
[19]张留俊,土福胜,刘建都.高速公路软土地基处理技术—试验研究与工程实 例[M].北京:人民交通出版社,2002
[20]张诚厚、袁文明、戴济群等.高速公路软基处理[M].北京:中国建筑工业出版社,1997
[21]Ekstrom J C,Bemtsson J A,Sallfors G B,Test fills of clays stabilized with cement columns[A],Proc.ⅩⅢ ICSMFRE[C],New Delhi,1994.1183-1186
[22]Alamgir M,Mjura N,Poorooshasb H B,Deformation ananlysis of soft ground reinforced by columnar inclusions[J],Computers and Geotechics,1996,(4):267-290
[23]Kuhn M atthew R,Mitchell James K.New perspectives on soil creep[J].Journal of Geotechnical Engineering,1993,119(3):507-524
[24]叶书麟.地基处理[M].北京:中国建筑工业出版社,1988
[25]龚晓南.复合地基[M].浙江:浙江大学出版社,1992
[26]刘洪平,郑俊杰,何新龙.公路软基处理中的石灰桩方法[J].西部探矿工程,2002,3:106-107
[27]黄容舟.浅谈石灰桩处理软基[J].西南公路,1996,12:28-30
[28]邢永强,温宏亮.软弱地基的石灰桩加固处理[J].洛阳大学学报,2004,19(2):77-80
[29]袁内镇.石灰桩作用机理新认识.第七届全国土力学照基础工程学术会议论文集[C].北京:中国建筑工业出版社,1994
[30]Tavenas,Leroueil.Effects of stressesand time on yielding of clays.Proc.of 9th ICSMFE,Tokyo,1977,319-326
[31]Mindlin R D.solid.Physics.Force at a point in the interior of a semiinfinite solid[J].Physics.Vol.7,1936:195-202
[32]苏羽,杨倩畅,李云军等.石灰桩复合地基承载力试验研究[J].沈阳建筑工程学院学报,2000,16(1):17-19
[33]地基处理委员会.第三届地基处理学术讨论会论文集[C].杭州:浙江大学出版社,1992
[34]罗庆裕,孙伯永.深圳市滨海大道软基处理工程[M].塑料板排水法加固软基工程实例集.北京:人民交通出版社,1999
[35]王引生.高速公路软土地基的沉降问题[J].中国公路学报,1993,6(1):47-51
[36]龚晓南.复合地基理论及工程应用[M].北京:中国建筑工业出版社,2002
[37]Yin J H,Grahan J.Elastic visco-plastic modeling of one-dimensional consolidation[J].Geotechnique,1996,46(3):515-527
[38]All Fakher,Colin J,Jones F P,etal,Yield stress of super soft clays[J].Geo and Geoenviron,Eng,1999,125(6):499-509
[39]Geddes J D.Stresses in foundation soils due to vertical subsurface load[J].Geotechnique,1966,16:231-255
[40]Poulos H G,davis E H.Pile Foundation Analysis andDesign[M].New York,1980
[41]周德泉,张可能.强夯加固填土的效果与机理分析.中南大学学报(自然科学版).2004,35(2):322-327
[42]周余国.强夯加固回填土的有效加固深度预估与数值模拟[硕士学位论文].长沙:长沙理工大学,2007
[43]李荣玉.真空堆载联合预压加固堤防软土地基沉降预测研究[硕士学位论文].河海大学,2004
[44]李荣玉.真空预压法加固软土地基的现场试验与理论研究[硕士学位论文].中国海洋大学,2007
[45]康帅.袋装砂井处理软土地基固结沉降的研究[硕士学位论文].东北林业大学,2007
[46]河海大学.交通土建软土地基工程手册[M].北京:人民交通出版社,2001
[47]Tan S A.Validation of hyperbolic method for settlement in clays with vertical drains[J].Soil and Foundations,1995,35(1):101-113
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