Jianjin Chen, Jian-Hua Wang, R. Liang, Wei-Wei Fan, Wei-dong Wang
{"title":"大型深基坑开挖中拔桩基础的性能研究","authors":"Jianjin Chen, Jian-Hua Wang, R. Liang, Wei-Wei Fan, Wei-dong Wang","doi":"10.1061/41095(365)175","DOIUrl":null,"url":null,"abstract":"Soil unloading and rebound induced by large-scale deep excavation may affect the performance and integrity of existing piles inside the excavation zone,especially for up-lift piles.The non-linear finite element is employed to investigate the behavior of the up-lift piles in Shanghai Expo Underground Substation Project during deep excavation.Parameters of the subsoil are obtained by inverse analysis of the load tests on the up-lift piles.The behavior of the up-lift piles during deep excavation and under normal working load is analyzed by using the parameters.Results show that the tension force induced by excavation exerts a more negative influence on up-lift piles than normal piles.Therefore this pretension should be taken into consideration during pile design.Analysis shows the bottom-enlarged up-lift piles are subjected to a larger pretension force during excavation than ordinary up-lift piles.The pretension force of piles under working load can be deduced from the combination of the tension force induced by excavation and the tension force induced by working load.","PeriodicalId":39371,"journal":{"name":"岩土工程学报","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2010-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"8","resultStr":"{\"title\":\"Behavior of Uplift Pile Foundation during Large-Scale Deep Excavation\",\"authors\":\"Jianjin Chen, Jian-Hua Wang, R. Liang, Wei-Wei Fan, Wei-dong Wang\",\"doi\":\"10.1061/41095(365)175\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Soil unloading and rebound induced by large-scale deep excavation may affect the performance and integrity of existing piles inside the excavation zone,especially for up-lift piles.The non-linear finite element is employed to investigate the behavior of the up-lift piles in Shanghai Expo Underground Substation Project during deep excavation.Parameters of the subsoil are obtained by inverse analysis of the load tests on the up-lift piles.The behavior of the up-lift piles during deep excavation and under normal working load is analyzed by using the parameters.Results show that the tension force induced by excavation exerts a more negative influence on up-lift piles than normal piles.Therefore this pretension should be taken into consideration during pile design.Analysis shows the bottom-enlarged up-lift piles are subjected to a larger pretension force during excavation than ordinary up-lift piles.The pretension force of piles under working load can be deduced from the combination of the tension force induced by excavation and the tension force induced by working load.\",\"PeriodicalId\":39371,\"journal\":{\"name\":\"岩土工程学报\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2010-02-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"8\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"岩土工程学报\",\"FirstCategoryId\":\"1087\",\"ListUrlMain\":\"https://doi.org/10.1061/41095(365)175\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"Earth and Planetary Sciences\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"岩土工程学报","FirstCategoryId":"1087","ListUrlMain":"https://doi.org/10.1061/41095(365)175","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Earth and Planetary Sciences","Score":null,"Total":0}
Behavior of Uplift Pile Foundation during Large-Scale Deep Excavation
Soil unloading and rebound induced by large-scale deep excavation may affect the performance and integrity of existing piles inside the excavation zone,especially for up-lift piles.The non-linear finite element is employed to investigate the behavior of the up-lift piles in Shanghai Expo Underground Substation Project during deep excavation.Parameters of the subsoil are obtained by inverse analysis of the load tests on the up-lift piles.The behavior of the up-lift piles during deep excavation and under normal working load is analyzed by using the parameters.Results show that the tension force induced by excavation exerts a more negative influence on up-lift piles than normal piles.Therefore this pretension should be taken into consideration during pile design.Analysis shows the bottom-enlarged up-lift piles are subjected to a larger pretension force during excavation than ordinary up-lift piles.The pretension force of piles under working load can be deduced from the combination of the tension force induced by excavation and the tension force induced by working load.