东海大桥桩基冲刷防护工程斜向溜筒拋石船关键技术
摘要：东海大桥非通航孔桥采用高桩承台结构,最近在桩基周围发生持续冲刷,目前冲刷深度已接近设计警戒深度,对桥梁结构安全构成一定影响。为保障结构安全并预防可能继续发生的冲刷,需对桥梁墩台基础的桩基进行防冲刷保护。传统的水下抛石方法及抛石设备并不适用于桩群内部回填料的抛填作业,依托本工程开展了斜向溜筒抛石船的关键技术研究,详细介绍了斜向溜筒抛石船在研究过程中面临的主要技术难度及技术成果。
关键词：桥梁工程桩基防冲刷斜向溜筒抛石船施工技术
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[5] 杨涛,文华,孔超.厚砂层地基中“桥建合一”桩基动力特性振动台试验研究[J].施工技术,2020,49(17):61-64,88.
[6] 陈宗辉,陈海波.马来西亚拉让江大桥PHC管桩基础施工关键技术[J].施工技术,2020,49(11):48-51.
[7] 熊梦馨,肜增湘,罗学东,等.基坑开挖影响下高架桥桩基托换体及基坑沉降与变形分析[J].施工技术,2019,48(5):52-57,109.
[2] 巩伦宝,朱秀荣.浮吊船网包抛石法在长江镇扬河段护岸工程中的应用[J].江苏水利,2014(S1):53-55.
[3] 郑锋利,谷志敏.温州瓯江北口大桥中塔沉井冲刷防护技术[J].桥梁建设,2018,48(1):106-111.
[4] 陈述.东海大桥桥墩基础冲刷防护方案研究[J].世界桥梁,2019,47(4):17-21.
[5] 杨涛,文华,孔超.厚砂层地基中“桥建合一”桩基动力特性振动台试验研究[J].施工技术,2020,49(17):61-64,88.
[6] 陈宗辉,陈海波.马来西亚拉让江大桥PHC管桩基础施工关键技术[J].施工技术,2020,49(11):48-51.
[7] 熊梦馨,肜增湘,罗学东,等.基坑开挖影响下高架桥桩基托换体及基坑沉降与变形分析[J].施工技术,2019,48(5):52-57,109.
Key Technology of Inclined Chute Riprap Ship in Pile Foundation Scouring Protection Project of Donghai Bridge
Abstract: The non navigable span bridge of Donghai Bridge adopts high pile cap structure. Recently, continuous scouring occurred around the pile foundation. At present, the scouring depth is close to the designed warning depth, which has a certain impact on the safety of bridge structure. In order to ensure the safety of the structure and prevent possible scouring, it is necessary to protect the pile foundation of the bridge pier foundation from scouring. The traditional underwater riprap method and riprap equipment are not suitable for the internal backfill operation of pile group. Based on this project, the key technology research of inclined chute riprap ship is carried out, and the main technical difficulties and technical achievements of inclined chute riprap ship in the research process are introduced in detail.
Keywords: bridges; piles; scour-prevention; inclined chute; riprap ship; construction
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