城际铁路隧道下穿机场滑行道方案探讨
发布时间：2019-04-12 17:08
【摘要】：珠三角城际铁路新塘经白云机场至广州北工程花机间隧道下穿广州白云国际机场T3、T4及特种车滑行道。针对穿越工程地层上软下硬、岩溶发育的特点,在不停航的情况下,对盾构法及矿山法穿越方案进行探讨。设计通过超前预注浆加固、高压水平旋喷桩超前支护、长管棚超前支护等措施保证穿越工程的安全。经数值分析,各项指标满足机场方面要求,明确采用矿山法下穿滑行道的可行性,同时建议对先行隧道施工过程中的最大沉降控制值按最终控制标准的80%~90%进行控制。岩溶按"开挖前探明、开挖中发现"进行分类处理。
[Abstract]:Pearl River Delta Intercity Railway Xintang via Baiyun Airport to Guangzhou North Project Huaxing Tunnel through Guangzhou Baiyun International Airport T3, T4 and special vehicle taxiway. In view of the characteristics of soft, hard and karst development in crossing engineering strata, the shield method and mine method are discussed in this paper under the condition of no stopping navigation. It is designed to ensure the safety of the crossing project by means of pre-grouting, high-pressure horizontal jet grouting pile advance support, long pipe shed advance support and other measures to ensure the safety of the crossing project. Through numerical analysis, it is found that each index meets the requirements of airport and the feasibility of adopting mine method to cross the taxiway is clear. At the same time, it is suggested that the maximum settlement control value in advance tunnel construction should be controlled by 80% ~ 90% of the final control standard. Karst is classified according to "proved before excavation, discovered in excavation".
【作者单位】： 中铁工程设计咨询集团有限公司;
【分类号】：U455.4
，
本文编号：2457212
[Abstract]:Pearl River Delta Intercity Railway Xintang via Baiyun Airport to Guangzhou North Project Huaxing Tunnel through Guangzhou Baiyun International Airport T3, T4 and special vehicle taxiway. In view of the characteristics of soft, hard and karst development in crossing engineering strata, the shield method and mine method are discussed in this paper under the condition of no stopping navigation. It is designed to ensure the safety of the crossing project by means of pre-grouting, high-pressure horizontal jet grouting pile advance support, long pipe shed advance support and other measures to ensure the safety of the crossing project. Through numerical analysis, it is found that each index meets the requirements of airport and the feasibility of adopting mine method to cross the taxiway is clear. At the same time, it is suggested that the maximum settlement control value in advance tunnel construction should be controlled by 80% ~ 90% of the final control standard. Karst is classified according to "proved before excavation, discovered in excavation".
【作者单位】： 中铁工程设计咨询集团有限公司;
【分类号】：U455.4
，
本文编号：2457212
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