摘要
随着城市发展、海洋资源开发以及旅游业需求的不断增长,人类开展了人工海岛的建设工作.然而,传统的非围堰式填海和围堰式湿法填海方法存在显著不足:地基处理缺乏系统性的加固措施,容易导致较大沉降;回填材料施工过程中易对海洋环境造成扰动,影响水质和生态系统;后续工程施工中存在重复开挖工序,增加了工程量和成本.为了解决上述不足,提出一种同步建造人工海岛城市的施工方法,即围堰式干法填海.该方法的具体操作是:在预定区域的外侧两端相向构筑围堰,同时对填土区进行海上水泥土搅拌桩地基加固;围堰施工完成后,抽取海水并在原状海底平整铺设垫层;进行建筑桩基础施工,开展底部标高处的隧道、管廊和地下室等装配式地下结构的施工,并同步进行土体分层回填;回填至上一层结构的施工工作面,完成结构施工后再次回填,如此循环,直至回填至指定标高.同步建造人工海岛的方法能够减少填筑材料的用量以及再开挖施工的费用,极大地缩短建设周期、降低建设成本,并且减轻填海过程对海洋环境造成的污染.研究成果可为大型人工海岛的建造提供新的思路和参考依据.
With the continuous growth of urban development,ocean resource exploitation and tourism demands,the construction of artificial islands has become increasingly important.Traditional methods for constructiing artificial islands mainly include non-cofferdam reclamation and cofferdam-based wet reclamation.However,these methods have several problems:the ground treatment lacks systematic reinforcement measures,which can easily lead to significant settlement;the construction process of backfill materials is prone to disturbing the marine environment,affecting water quality and the ecosystem;and there are repetitive excavation procedures in subsequent engineering construction,increasing the workload and costs.To address these issues,a synchronous construction method,namely dry reclamation with cofferdam,is proposed for building artificial-island cities.The specific procedures of this method are as follows:cofferdams are constructed facing each other on the outer sides of the designated area,while offshore cement-soil mixing piles are used to reinforce the ground in the filling area;after the cofferdam is completed,seawater is pumped out and a cushion layer is evenly laid on the original seabed;building pile foundation are then constructed,followed by the installation of prefabricated underground structures such as tunnels,pipe galleries,and basements at the bottom elevation.Simultaneously,soil backfilling is carried out layer by layer.This process is repeated structural construction and soil backfilling until the backfill reaches the specified elevation.The synchronous construction method can reduce the amount of filling material and the cost of re-excavation,which can greatly shorten the construction period and lower overall costs,and reduce environmental pollution during the reclamation process.The research results can provide a new option and reference for construction of large-scale artificial islands.
作者
张明
陈湘生
陈长卿
周进威
陈佛赐
李强
关军
苏栋
ZHANG Ming;CHEN Xiangsheng;CHEN Changqing;ZHOU Jinwei;CHEN Foci;LI Qiang;GUAN Jun;SU Dong(China State Construction Engineering(Hong Kong)Co.Ltd.,Hong Kong 999077,P.R.China;China State Construction International Holdings Limited,Hong Kong 999077,P.R.China;College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,Guangdong Province,P.R.China;China Construction Civil Engineering Co.Ltd.,Hong Kong 999077,P.R.China;China Shipping Construction Co.Ltd.,Shenzhen 518057,Guangdong Province,P.R.China)
出处
《深圳大学学报(理工版)》
北大核心
2025年第1期19-29,共11页
Journal of Shenzhen University(Science and Engineering)
基金
国家自然科学基金资助项目(52090084)
深圳市科技计划资助项目(20220808143139001)
深圳大学2035追求卓越研究计划资助项目(2022B007)。
关键词
岩土工程
人工海岛
同步建造
围堰结构
地基加固
装配式结构
geotechnical engineering
artificial island
simultaneous construction
cofferdam structure
foundation reinforcement
prefabricated structure
