Key Technologies for Design of Pearl River Estuary Subsea Tunnel of Shenzhen-Jiangmen Railway（深江铁路珠江口海底隧道设计关键技术）

doi:10.3973/j.issn.2096-4498.2025.08.013

隧道建设（中英文） ›› 2025, Vol. 45 ›› Issue (8): 1561-1576.DOI: 10.3973/j.issn.2096-4498.2025.08.013

Key Technologies for Design of Pearl River Estuary Subsea Tunnel of Shenzhen-Jiangmen Railway（深江铁路珠江口海底隧道设计关键技术）

宋超业^{1， 2}，刘文骏^{1， 2}，贺维国¹，于勇¹，吕书清^{1， 2}

（1. 中铁第六勘察设计院集团有限公司，天津 300133; 2. 中铁隧道勘测设计院有限公司，天津 300131）

出版日期:2025-08-20 发布日期:2025-08-20
作者简介:宋超业(1982—)，男，安徽金寨人，2005年毕业于江西理工大学，岩土工程专业，硕士，正高级工程师，现从事隧道与地下工程设计和研究工作。 E-mail： scyesky@126.com。

Key Technologies for Design of Pearl River Estuary Subsea Tunnel of Shenzhen-Jiangmen Railway

SONG Chaoye^{1, 2}, LIU Wenjun^{1, 2}, HE Weiguo¹, YU Yong¹, LYU Shuqing^{1, 2}

(1. China Railway Liuyuan Group Co., Ltd., Tianjin 300133, China; 2. China Railway Tunnel Survey & Design Institute Co., Ltd., Tianjin 300131, China)

Online:2025-08-20 Published:2025-08-20

摘要/Abstract

摘要： 以目前我国埋置最深（115 m）、水压最大（1.06 MPa）的海底隧道珠江口隧道为工程背景，采用工程类比和综合比选的方法，对复杂环境铁路海底隧道的设计关键技术，包括总体施工方法选择、盾构段设计、矿山段设计、海域对接和斜井降水设计等进行研究，提出结合不同区段地质情况及关键因素采用盾构和矿山组合工法。研究结果表明： 1）盾构管片厚度根据最大水压力分段设计，接缝防水采用内外双道三元乙丙弹性密封垫的布置形式；盾构换刀根据不同水压考虑采用常压换刀、减压限排换刀或设置检修点一次性通过不良地层的模式。2）矿山法段隧道结构承受水压力根据地质条件差异确定，按0.2 MPa进行核算，防排水考虑超前注浆控制排水量，排水系统可维护。3）盾构-矿山法海域对接优先采用开挖拆机硐室方案，同时预留盾构原位拆解的条件；邻近海域隧道斜井穿越透水地层时，采用降水可以保障地层稳定。

关键词: 铁路隧道, 海底隧道, 盾构-矿山组合, 防排水, 复杂环境, 高水压

Abstract: The Pearl River Estuary subsea tunnel of Shenzhen-Jiangmen railway, with 1.06 MPa ultra-high water pressure, 115 m buried depth, and highly complex geological conditions, has big construction challenges. In this paper, the following key design aspects for subsea railway tunnels under high water pressure are studied, with the Pearl River Estuary subsea tunnel as an example, by means of engineering analogy and comparison and contrast: the selection of the tunnel construction method, the design of the tunnel sections constructed by the shield method, the design of the tunnel section constructed by the mining method, the docking between the tunnel section constructed by the shield method and that constructed by the mining method, and the dewatering for the construction of the inclined shaft. Based on the geological conditions, the authors propose shield method + mining method for the construction of the tunnel. The results demonstrate that: (1) For tunnel sections constructed by the shield method, the thickness of the segments is designed according to the maximum water pressure, double rows of EPDM elastic sealing gaskets are designed for the waterproofing of the segment joints, and cutter replacement under atmospheric pressure, cutter replacement under reduced pressure, and shield repairing points are suggested to replace the cutters. (2) For the tunnel section constructed by the mining method, the water pressure on the tunnel structure, which is determined according to the geological conditions, is set at 0.2 MPa, advance grouting is recommended to control the drainage amount, and repairable drainage systems are recommended. (3) Shield assembly cavern is recommended with priority, with conditions for in-situ destructive demolition of the shield reserved. The inclined shaft of the tunnel passes through permeable strata, and dewatering is recommended to ensure the stability of the strata.

Key words: railway tunnel, subsea tunnel, shield method + mining method, waterproofing and drainage, complex environment, high water pressure

宋超业, 刘文骏, 贺维国, 于勇, 吕书清. Key Technologies for Design of Pearl River Estuary Subsea Tunnel of Shenzhen-Jiangmen Railway（深江铁路珠江口海底隧道设计关键技术）[J]. 隧道建设, 2025, 45(8): 1561-1576.

SONG Chaoye, LIU Wenjun, HE Weiguo, YU Yong, LYU Shuqing. Key Technologies for Design of Pearl River Estuary Subsea Tunnel of Shenzhen-Jiangmen Railway[J]. Tunnel Construction, 2025, 45(8): 1561-1576.

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Key Technologies for Design of Pearl River Estuary Subsea Tunnel of Shenzhen-Jiangmen Railway（深江铁路珠江口海底隧道设计关键技术）

Key Technologies for Design of Pearl River Estuary Subsea Tunnel of Shenzhen-Jiangmen Railway

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