利用围护结构自然接地的地铁接地方案研究及应用

朱   彦 郝勇奇 王   俊（北京城建设计发展集团股份有限公司，北京市 100161）

Research and Application of the Earthing Scheme for Metro Using Enclosure

Structure as the Natural Earthing Electrode

ZHU Yan HAO Yongqi WANG Jun（Beijing Urban Construction Design

& Development Group Co.,Limited, Beijing 100161，China）

Abstract：Some problems can often be found around the earth‑termination system in practical metro station projects,including high soil resistivity,a large volume of rocks,and high construction difficulty,and conventional earthing schemes have certain limitations;the earthing scheme for the metro that uses the enclosure structure at the station as the natural earthing electrode is proposed,the specific schemes for different types of stations are analyzed and applied to such projects as the Metro Line 12 in Zhengzhou,achieving good earthing effect;such earthing scheme is verified,and compared with conventional earthing schemes for metro,such scheme is characterized by higher adaptability,simpler process,lower construction difficulty,better effect,lower construction cost, and shorter construction duration.

Key words：natural earthing electrode;earth‑electrode network;enclosure structure;metro;station;soil resistivity;construction difficulty;earthing scheme

摘　要：实际地铁车站工程项目中接地装置四周往往存在土壤电阻率过高、岩石多、施工难度大等问题，常规的接地方案具有一定的局限性；提出利用车站围护结构作为自然接地体的地铁接地方案，分析不同车站形式下的具体方案做法，并将其应用到郑州轨道交通12号线等工程项目中且取得了良好的接地效果；验证了该接地方案相较于常规地铁接地方案具有适应性更强、工序简单、降低施工难度、效果更优等特点，并且可降低建设成本、缩短施工工期。

关键词：自然接地体；接地网；围护结构；地铁；车站；土壤电阻率；施工难度；接地方案

中图分类号：U231 +.4            　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2024.02.012