摘要
为解决复杂地质环境下孤石区矩形顶管的施工难题,基于广东省珠海市香洲区港湾大道改造工程中的契爷岭人行通道的顶管项目,结合实际工程条件,对顶管掘进中遇孤石的施工风险进行分析。根据孤石的大小、形状以及分布情况,讨论顶管施工过程中遇孤石时不同施工方案的优缺点,系统地对比并分析5种障碍物处理方案的工程成本、环境影响、施工难度、安全性以及适用范围,优选出适合本案例工程的最佳处理方法,以达到提效、降本和避险的目的。本案例工程采取套管技术中的潜孔锤预处理施工工艺将孤石破碎并取出,顺利恢复顶管掘进施工,可确保清障工作高效、安全、有序地开展,应用效果优良。
To solve the construction difficulties of the rectangular pipe jacking in the boulder area in a complex geological environment,based on the pipe jacking project of the pedestrian passage of the Qieye Ridge in the transformation project of the Harbor Avenue in Xiangzhou District,Zhuhai City,Guangdong Province,the construction risks encountered by boulders during pipe jacking excavation were analyzed in conjunction with the actual engineering conditions.According to the size,shape,and distribution of the boulders,the advantages and disadvantages of different construction schemes when encountering boulders during pipe jacking construction process were discussed,and the engineering costs,environmental impact,construction difficulty,safety,and applicability of five obstacle handling schemes were systematically compared and analyzed.The best handling method suitable for this case project was selected to achieve the purpose of improving efficiency,reducing costs,and avoiding risks.The case project adopted the pre-treatment construction technology of the down-the-hole hammer in the casing technology to crush and remove the boulders,and successfully restored the pipe jacking excavation construction.This solution could ensure efficient,safe,and orderly clearance work and had excellent application effects.
作者
牛巍崴
黄伟洪
陈玉林
刘建坤
陈雪华
NIU Weiwei;HUANG Weihong;CHEN Yulin;LIU Jiankun;CHEN Xuehua(School of Civil Engineering,Sun Yat-Sen University,Guangzhou 510275,Guangdong,China;School of Energy and Water Conservancy,Shenyang Institute of Technology,Shenyang 113122,Liaoning,China;Large Shield Engineering Branch,China Railway Tunnel Group Co.,Ltd.,Zhuhai 519090,Guangdong,China;Guangzhou Jintu Geotechnical Engineering Technology Co.,Ltd.,Guangzhou 510275,Guangdong,China)
出处
《隧道与地下工程灾害防治》
2024年第3期50-59,共10页
Hazard Control in Tunnelling and Underground Engineering
基金
广东省重点领域研发计划资助项目(2019B111105001)
冻土工程国家重点实验室开放基金资助项目(SKLFSE202104)
关键词
顶管技术
设备选型
矩形顶管
顶管施工
复杂地质
孤石区
pipe jacking technology
equipment selection
rectangular pipe jacking
pipe jacking construction
complex geology
boulder area
