液化滑移地层桩基础破坏机理分析
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摘要
地震液化产生的侧向滑移或流动地层对桩基础的破坏作用一直缺乏系统的震灾调查数据和统计分析,对设计方法的修订也缺乏相应的理论依据。本文对地震液化地层滑移作用,软硬互层交界面效应等进行应力简化,基于修正Winkler地基梁理论及日本抗震规范推荐的响应位移法,通过对桩基破坏的算例分析,初步验证了应力解析法的有效和实用性,为我国近期发生的浅源断层大地震区的桩基抗震设计提供借鉴。
For short of the systemic statistical data of the damaged pile foundations in liquefaction and lateral flow layers after the great earthquake,the improvement of the theory and the design method also is absence the relevant basement.Through the simplified stress method to deal with the liquefied slip layers and the soft-hard interfaces,the modified Winkler beam theory and the response-displacement method,which were recommended by the guide manual of Japan Architecture Association,are introduced to analysis the certain example.The effective and practicability of the method can be validated in the first step.Research can be referenced in the seismic control and design method for the pile foundation in the future.
For short of the systemic statistical data of the damaged pile foundations in liquefaction and lateral flow layers after the great earthquake,the improvement of the theory and the design method also is absence the relevant basement.Through the simplified stress method to deal with the liquefied slip layers and the soft-hard interfaces,the modified Winkler beam theory and the response-displacement method,which were recommended by the guide manual of Japan Architecture Association,are introduced to analysis the certain example.The effective and practicability of the method can be validated in the first step.Research can be referenced in the seismic control and design method for the pile foundation in the future.
引文
1陈运泰,许力生,张勇,等.2008年5月12日汶川特大地震震源特性分析报告.www.eqqh.gov.cn/download/chenyuntai.pdf,2008
2陈明山,段绍纬,黄永和,等.地震地区高速铁路桩基设计考虑.岩土工程学报,2004;26(6):761—766
3 Moh Z C.Geotechnical issues in design and construction of viaducts ofthe Taiwan High Speed Rail.Proc of the 12th Asian Regional Conf.onSoil Mechanics and Geotechnical Engineering.Singapore,KeynoteSpeech,2003
4刘惠珊.桩基抗震设计探讨—日本阪神大地震启示.工程抗震,2000;12(3):27—32
5建築基礎構造設計指針.日本建築学会出版.2001
6建築基礎構造設計指針.日本建築学会出版1988
7 Guo Xuan,Zhao Chenggang.Case study on the effect of ground later-al flow on piles foundation due to soil liquefaction.Science Press,Progress in Safety Science and Technology.2004;(10):950—956
8郭璇.1995年日本国兵库县南部地震桩基典型破坏模式的分析.世界地震工程.2004;20(3):100—108
9郭璇,赵成刚,于威威.地震液化引起的地面大变形对路桥桩基的影响研究.2005全国博士论坛交通运输工程学科分论坛,2005:1426—1432
10中澤明夫,大岡弘,社本浅香.兵W県南部地震の側方流動による杭の破壊-変形モ-ド、日本建築学会構造系論文集,1997;(495):95—100
2陈明山,段绍纬,黄永和,等.地震地区高速铁路桩基设计考虑.岩土工程学报,2004;26(6):761—766
3 Moh Z C.Geotechnical issues in design and construction of viaducts ofthe Taiwan High Speed Rail.Proc of the 12th Asian Regional Conf.onSoil Mechanics and Geotechnical Engineering.Singapore,KeynoteSpeech,2003
4刘惠珊.桩基抗震设计探讨—日本阪神大地震启示.工程抗震,2000;12(3):27—32
5建築基礎構造設計指針.日本建築学会出版.2001
6建築基礎構造設計指針.日本建築学会出版1988
7 Guo Xuan,Zhao Chenggang.Case study on the effect of ground later-al flow on piles foundation due to soil liquefaction.Science Press,Progress in Safety Science and Technology.2004;(10):950—956
8郭璇.1995年日本国兵库县南部地震桩基典型破坏模式的分析.世界地震工程.2004;20(3):100—108
9郭璇,赵成刚,于威威.地震液化引起的地面大变形对路桥桩基的影响研究.2005全国博士论坛交通运输工程学科分论坛,2005:1426—1432
10中澤明夫,大岡弘,社本浅香.兵W県南部地震の側方流動による杭の破壊-変形モ-ド、日本建築学会構造系論文集,1997;(495):95—100
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