2010在0日 水运工程 Sep.2019 第9期总第560期 Port Waterway Engineering No.9 Serial No.560 复合地基及组合基床在港珠澳大桥 沉管隧道中的应用 李建宇,卢永昌,林佑高,何洪涛 (中交第四航务工程勘察设计院有限公司,广东广州510230 摘要:针对港珠澳大桥岛隧工在在外海、深水、厚软基地质条件下沉管隧道基础沉降及差异沉降控制技术问题,对传统 基与复合地基方豪进行对比,提出港珠澳沉管隧道采用PH汇刚性桩、高噴柔性桩、挤密砂桩数体桩复合地基逐步过渡到天然 地基的地基及抛石+碎石圭的姐合基床方案。复合地基沉降计算分析及观测数据证明提出的新型复合地基及组合基床方控制 沉降及差异沉降的效果显著。提出沉管隧道基出沉降主要组成及复合地基建议的沉降计算方法,可为奏似工往提供参考。 关键词:附性桩复合地基:高喻柔性桩复合地基:挤密砂桩散依桩复合地基:组合基床:沉降:差异沉降 中图分类号:TU447:U6 文献标志码:A 文章编号:1002-4972(2019)09-0273-06 D0:10.16233j.cnki.ism1002-.4972.20190904.040 Application of composite foundation and foundation bed in immersed tube tunnel of Hong Kong-Zhuhai-Macau Bridge LI Jian-yu.IU Yo chang.LIN You-gao.HE Hong-ac (CCCC-FHDI Engipee ring Co.,Ld.Guangzhou 510230.China) Abstract:To control the settlement and differential settlement of the tube tunnel foundation control under the geologic condition of open sea,deep water and thick soft base for the Hong Kong-Zhuhai-Macau bridge tunnel engineering immersed tbe tunnel,we carry out a omparison between the traditional pile foundation and the of the PHC rigid pile,high jet grouting flexible pile,and sand compaction piles gradually to the natural foundation and composite foundation bed.The composite foundation calculation analysis and observation data prov the remarkable effect of the composite foundation and composite foundation bed scheme for thecon of th settlement and differential settlement.The composition of the tube tunnel's foundation settlement and the recommended calculation method for the composite foundation are also given,which may serve as reference for Keywords:rigid pile composite foundation:jet grouting column composite foundation;sand compaction pile 岛碟工程是港珠澳大桥主体工程中投资规模 关键技术,认为沉管隧道是岛隧工程的关键,而 最大、技术难度最高的一个标段,包括为实现桥 隧道基础沉降控制技术是沉管隧道工程的关技 隧转换,在深水、软基区域填筑的东、西人工岛 术之一:孙钧等对沉管隧道复合地基做过介 超长、深埋沉管隧道以及部分非通航孔桥梁。 绍:本文全面地介绍沉管隧道复合地基及组合基 尹海卿阐述了人工岛和沉管隧道的设计与施工 床设计。 收稿日期:2019-0446 作者简介:李建宇(1980一),男,顺士,从事岩土工设计工作, (C)1994-2019 China Academie Joural Electronic Publishing House.All rights reserved.http://www.enki.net 2019 年 9 月 水运工程 Sep. 2019 第 9 期 总第 560 期 Port & Waterway Engineering No. 9 Serial No. 560 复合地基及组合基床在港珠澳大桥 沉管隧道中的应用 李建宇,卢永昌,林佑高,何洪涛 ( 中交第四航务工程勘察设计院有限公司,广东 广州 510230) 摘要: 针对港珠澳大桥岛隧工程在外海、深水、厚软基地质条件下沉管隧道基础沉降及差异沉降控制技术问题,对传统桩 基与复合地基方案进行对比,提出港珠澳沉管隧道采用 PHC 刚性桩、高喷柔性桩、挤密砂桩散体桩复合地基逐步过渡到天然 地基的地基及抛石+碎石垄的组合基床方案。复合地基沉降计算分析及观测数据证明提出的新型复合地基及组合基床方案控制 沉降及差异沉降的效果显著。提出沉管隧道基础沉降主要组成及复合地基建议的沉降计算方法,可为类似工程提供参考。 关键词: 刚性桩复合地基; 高喷柔性桩复合地基; 挤密砂桩散体桩复合地基; 组合基床; 沉降; 差异沉降 中图分类号: TU 447; U 6 文献标志码: A 文章编号: 1002-4972(2019)09-0273-06 Application of composite foundation and foundation bed in immersed tube tunnel of Hong Kong-Zhuhai-Macau Bridge LI Jian-yu,LU Yong-chang,LIN You-gao,HE Hong-tao ( CCCC-FHDI Engineering Co.,Ltd.,Guangzhou 510230,China) Abstract: To control the settlement and differential settlement of the tube tunnel foundation control under the geologic condition of open sea,deep water and thick & soft base for the Hong Kong-Zhuhai-Macau bridge tunnel engineering immersed tube tunnel, we carry out a comparison between the traditional pile foundation and the composite foundation,and propose the composite bed foundation scheme,which turns from the composite foundation of the PHC rigid pile,high jet grouting flexible pile,and sand compaction piles gradually to the natural foundation and composite foundation bed.The composite foundation settlement calculation analysis and observation data prove the remarkable effect of the composite foundation and composite foundation bed scheme for the control of the settlement and differential settlement. The composition of the tube tunnel s foundation settlement and the recommended calculation method for the composite foundation are also given,which may serve as reference for similar projects. Keywords: rigid pile composite foundation; jet grouting column composite foundation; sand compaction pile composite foundation; composite foundation bed; settlement; differential settlement 收稿日期: 2019-04-16 作者简介: 李建宇 ( 1980—) ,男,硕士,从事岩土工程设计工作。 岛隧工程是港珠澳大桥主体工程中投资规模 最大、技术难度最高的一个标段,包括为实现桥 隧转换,在深水、软基区域填筑的东、西人工岛, 超长、深埋沉管隧道以及部分非通航孔桥梁[1] 。 尹海卿[2] 阐述了人工岛和沉管隧道的设计与施工 关键技术,认为沉管隧道是岛隧工程的关键,而 隧道基础沉降控制技术是沉管隧道工程的关键技 术之一; 孙钧等[3-5] 对沉管隧道复合地基做过介 绍; 本文全面地介绍沉管隧道复合地基及组合基 床设计。 DOI:10.16233/j.cnki.issn1002-4972.20190904.040