长春百脑汇基坑支护优化设计
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摘要
基坑支护工程是当代岩土工程界研究的难点与热点问题。从远古追溯到现代,自人们开始懂得建造居所就有了建造工程,而深基坑工程就是建筑中的古老的基础工程,同时它也是综合了各学科的岩土工程。随着社会生产力发展水平的不断进步,建筑物高度不断增加,因建筑需要基础也就越做越深,其支护结构的难度也就不断加大,这就给这一古老课题提出了的新的内容和挑战。目前,在基坑设计中,我们既要满足它的安全性,同时也要考虑其经济性,而这两方面的性能通常又是比较矛盾的。由于现在还比较缺乏精确的设计计算方法和支护方案优选的方法,所以在实际工程中只能为了满足安全性,便使其支护类型的选择和设计都比较保守,这样就增加了投资,造成一些不必要的浪费;另一方面为了片面的追求经济性,从而降低了基坑的稳定性、变形性和设计安全方面的要求,造成一系列工程事故,导致了更大的经济损失。解决这一矛盾的最合理途径就是要不断深入的研究深基坑工程的优化设计。
本文首先分析了基坑工程的发展历史及国内外研究现状,并介绍了各种支护形式的特点及适用范围。针对长春百脑汇基坑工程的实际条件,对可能采用的各种支护形式在技术上和经济上进行了分析比较,选用了桩锚和复合土钉墙的支护方法,分别进行了设计计算,然后用理正深基坑软件对基坑的稳定性进行了验算,最后对所选用的两种支护结构分别进行了有限元数值模拟,针对基坑开挖过程的理论和方法进行较深入细致的研究,分析基坑的初始应力场、位移场的形成,提出考虑开挖单元、节点以及支撑,适合分步开挖的计算模拟方法。结合实际工程的检测,采用GTS大型有限元程序对其进行了分析计算,与实际检测结果进行对比。确定其参数的选取以及数值模拟的正确性,为我省以后的深基坑支护设计与施工提供一个实用依据。
Foundation pit support is the hot and difficult problem in geotechnical engineering nowadays. Construction appeared since people began to build, from the ancient to the present. The deep foundation pit engineering is the old foundation engineering, and it is also the geotechnical integrated each subject. As social productive force developing constantly and the height of buildings increasing, it need foundation deeper more and more to adapt to the building requires, and the difficulty of structure supporting is increasing, so there is a new content and challenge for the ancient subject. There has been such contradiction that haunts us in current foundation pit engineering design, the security and the economy. Because of lack of reliable design theory and better supporting method at present, it is often to make the supporting and design conservative for the safety in actual project. Therefore it has to increase investment and result unnecessary waste. On the other hand, sometimes it reduces the stability of foundation pit, deformation control and safety aspects of the design requirements in order to pursue economic, thereby causing the engineering accident, and resulting in greater economic losses. The way to solve this problem reasonably is to study the optimization design of deep foundation pit engineering.
The content analyzes the history and research status of foundation pit engineering firstly, and describes characteristics and applicable scope of various supporting forms. Then it makes analyses and compares with the each support forms probably used on economy and technology, aiming at practical condition of Changchun Buynow pit engineering. It selects the anchor pile and composite soil nailing wall supporting method, designs and calculates respectively, then makes checking using Lizheng deep foundation pit software, finally makes finite element numerical simulation of excavation process with the structure that is employed. It starts the careful research on the theory and method of the excavation process of foundation pit, analyses the forming the initial stress field and the displacement field of the foundation pit, and puts forward considering the excavation unit, node, the support, and numerical simulation method that fits excavation. Combined with practical engineering detection, using GTS finite element program has carried on the analysis, contrast to the actual result. To determine the parameters and the accuracy of numerical simulation, for me the province after the deep foundation pit support design and construction to provide a practical basis.
本文首先分析了基坑工程的发展历史及国内外研究现状,并介绍了各种支护形式的特点及适用范围。针对长春百脑汇基坑工程的实际条件,对可能采用的各种支护形式在技术上和经济上进行了分析比较,选用了桩锚和复合土钉墙的支护方法,分别进行了设计计算,然后用理正深基坑软件对基坑的稳定性进行了验算,最后对所选用的两种支护结构分别进行了有限元数值模拟,针对基坑开挖过程的理论和方法进行较深入细致的研究,分析基坑的初始应力场、位移场的形成,提出考虑开挖单元、节点以及支撑,适合分步开挖的计算模拟方法。结合实际工程的检测,采用GTS大型有限元程序对其进行了分析计算,与实际检测结果进行对比。确定其参数的选取以及数值模拟的正确性,为我省以后的深基坑支护设计与施工提供一个实用依据。
Foundation pit support is the hot and difficult problem in geotechnical engineering nowadays. Construction appeared since people began to build, from the ancient to the present. The deep foundation pit engineering is the old foundation engineering, and it is also the geotechnical integrated each subject. As social productive force developing constantly and the height of buildings increasing, it need foundation deeper more and more to adapt to the building requires, and the difficulty of structure supporting is increasing, so there is a new content and challenge for the ancient subject. There has been such contradiction that haunts us in current foundation pit engineering design, the security and the economy. Because of lack of reliable design theory and better supporting method at present, it is often to make the supporting and design conservative for the safety in actual project. Therefore it has to increase investment and result unnecessary waste. On the other hand, sometimes it reduces the stability of foundation pit, deformation control and safety aspects of the design requirements in order to pursue economic, thereby causing the engineering accident, and resulting in greater economic losses. The way to solve this problem reasonably is to study the optimization design of deep foundation pit engineering.
The content analyzes the history and research status of foundation pit engineering firstly, and describes characteristics and applicable scope of various supporting forms. Then it makes analyses and compares with the each support forms probably used on economy and technology, aiming at practical condition of Changchun Buynow pit engineering. It selects the anchor pile and composite soil nailing wall supporting method, designs and calculates respectively, then makes checking using Lizheng deep foundation pit software, finally makes finite element numerical simulation of excavation process with the structure that is employed. It starts the careful research on the theory and method of the excavation process of foundation pit, analyses the forming the initial stress field and the displacement field of the foundation pit, and puts forward considering the excavation unit, node, the support, and numerical simulation method that fits excavation. Combined with practical engineering detection, using GTS finite element program has carried on the analysis, contrast to the actual result. To determine the parameters and the accuracy of numerical simulation, for me the province after the deep foundation pit support design and construction to provide a practical basis.
引文
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[24]袁维坤.深基坑支护设计优化及工程实证研究[D].北京:中国地质大学,2009.
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[29]任文杰.基础工程[M].北京:中国建材工业出版社,2007.
[30]曹东.基坑桩锚支护结构的数值分析[D].武汉:武汉科技大学,2009.
[31]尉希成.周美玲.支挡结构设计手册[M].北京:中国建筑工业出版社,2004.
[32]Yung-Show Fang.Static earth pressure with wall movements[J].Journal of Geotechnical Engineering.1986,112(3):317-333.
[33]杨春艳.基坑工程土压力计算的影响因素分析[J].青岛理工大学学报,2006, 27(5):34-38.
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[36]余志成.深基坑支护设计与施工[M].中国建筑工业出版社,1997.
[37]陈国兴.樊良本等.基础工程学[M].北京:中国水利水电出版社,2002.
[38]冯谦.深基坑工程支护结构设计及优化方法研究[D].武汉:武汉理工大学,2006
[39]朱雍.基坑支护与加固技术概述[J].广西大学学报,2006(31):245一24.
[40]王阳.长春市远东石化大厦基坑支护设计与优化[D].长春:吉林大学,2004.
[41]高东立.北京某工程基坑支护优化设计和有限元模拟分析[D].长春:吉林大学,2007.
[42]俞建霖.龚晓南.深基坑工程的空间性状分析「J」.岩土工程学报,1999,2l(l): 21一25.
[43]张加粮.东大国际中心基坑工程优化与数值模拟[D].沈阳:东北大学,2008.
[2]董晓琳.长春赛德购物中心基坑工程设计[D].长春:吉林大学,2008.
[3]傅其锋.深基坑围护墙与支撑体系的有限元分析[D].哈尔滨:哈尔滨工业大学,2003.
[4]王兵.深基坑支护工程的设计分析及其应用研究[D].合肥:合肥工业大学,2010.
[5]赵永富.挡土墙与土压力计算理论[J].黑龙江水利科技,2008,36(2):93.
[6]张孟喜.土力学原理[M].武汉:华中科技大学出版社,2006.
[7]高晖.ABAQUS在软基固结过程分析中的应用研究[D].武汉:武汉理工大学,2006.
[8]保罗·斯奈思著.刘继飞.杜利民译. C++[M].辽宁教育出版社,2001.
[9]彭木昌.安瑞飞等.C++语言大全[M].国防工业出版社,1993.
[10]王孟奎.岳夏著.AutoCAD2000技巧与实例[M].海洋出版社,2000.
[11]刘熙媛.基坑开挖过程的试验与数值模拟及土的微观结构研究.天津:天津大学,2003.
[12]徐奴文.地铁车站深基坑开挖与支护有限元数值模拟[D].大连:大连理工大学,2008.
[13]单惠茗.长春国际金融中心基坑支护设计与数值模拟[D].长春:吉林大学,2011. [14]葛桂琼.型钢混凝土桩在基坑支护工程中的应用研究[D].合肥:合肥工业大学,2010.
[15]徐扬青.深基坑工程设计的优化原理与途径[J].岩石力学与工程学报,2001.3,20卷2期:248-251.
[16]苗志春.熊楚炎.深基坑支护方案的优化[J].宁波高等专科学校学报,2001.12,13卷4期:58-62.
[17]龚晓南.高有潮.深基坑工程设计施工手册[M].中国建筑工业出版社,1998.
[18]余志成.施文华.深基坑支护设计与施工[M].中国建筑工业出版社,1997.
[19]黄运飞.深基坑工程实用技术[M].兵器工业出版社,1996.
[20]高大钊.孙钧等.深基坑工程[M].机械工业出版社,2002.
[21]陈书申.经典土压力理论的局限与小变位土压力计算的建议.土工基础,1997,11(2),15一21
[22]孙淑贤.基坑开挖伴随应力状态改变对土压力的影响.工程勘察,1998.35一8.
[23]袁静.基坑开挖过程中m参数的选取分析.工业建筑,2000,30(9):6一51.
[24]袁维坤.深基坑支护设计优化及工程实证研究[D].北京:中国地质大学,2009.
[25]龚晓南.基坑工程发展中应重视的几个问题[J].岩土工程学报.2006,(S1):1321-1324.
[26]刘二栓.深基坑工程特点及存在的问题[J].有色金属设计,2004.31(1):45-47.
[27]黄强.深基坑支护工程设计技术[M].中国建材工业出版社,1996.
[28]张锦屏.基坑工程的特点和若干问题分析[J].低温建筑技术.2003(.3).64-65.
[29]任文杰.基础工程[M].北京:中国建材工业出版社,2007.
[30]曹东.基坑桩锚支护结构的数值分析[D].武汉:武汉科技大学,2009.
[31]尉希成.周美玲.支挡结构设计手册[M].北京:中国建筑工业出版社,2004.
[32]Yung-Show Fang.Static earth pressure with wall movements[J].Journal of Geotechnical Engineering.1986,112(3):317-333.
[33]杨春艳.基坑工程土压力计算的影响因素分析[J].青岛理工大学学报,2006, 27(5):34-38.
[34]重庆大.学同济大学.哈尔滨工业大学.土木工程施工[M].北京:中国建筑工业出版社,2003.
[35]陈肇元.崔京浩.土钉支护在基坑工程中的应用[M].建筑工业出版社,2000.
[36]余志成.深基坑支护设计与施工[M].中国建筑工业出版社,1997.
[37]陈国兴.樊良本等.基础工程学[M].北京:中国水利水电出版社,2002.
[38]冯谦.深基坑工程支护结构设计及优化方法研究[D].武汉:武汉理工大学,2006
[39]朱雍.基坑支护与加固技术概述[J].广西大学学报,2006(31):245一24.
[40]王阳.长春市远东石化大厦基坑支护设计与优化[D].长春:吉林大学,2004.
[41]高东立.北京某工程基坑支护优化设计和有限元模拟分析[D].长春:吉林大学,2007.
[42]俞建霖.龚晓南.深基坑工程的空间性状分析「J」.岩土工程学报,1999,2l(l): 21一25.
[43]张加粮.东大国际中心基坑工程优化与数值模拟[D].沈阳:东北大学,2008.