利用盾构螺旋机双闸门开度差防喷涌施工技术

丁二威, 骆介华, 刘少凯, 黄江华, 吴勇, 杨祥祥 , 任辉, 程绍恭, 赵云辉

doi:10.3973/j.issn.2096-4498.2023.S1.058

隧道建设 >

2023 , Vol. 43 >Issue S1: 493 - 498

DOI: https://doi.org/10.3973/j.issn.2096-4498.2023.S1.058

施工技术

利用盾构螺旋机双闸门开度差防喷涌施工技术

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（1. 浙江华东测绘与工程安全技术有限公司, 浙江杭州 310012；2. 中国电建集团华东勘测设计研究院有限公司, 浙江杭州 310012;3. 合肥市轨道交通集团有限公司，安徽合肥 230001； 4. 浙江省智慧轨道交通工程技术研究中心, 浙江杭州 310012； 5. 中建八局轨道交通建设有限公司，江苏南京 210018）

丁二威（1985—），男，江苏宿迁人，2011年毕业于兰州交通大学博文学院，土木工程专业，本科，工程师，现从事城市轨道交通工程风险咨询管理与研究工作。Email： 582954702@qq.com。

网络出版日期: 2023-08-28

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Construction Technology for Gushing Control by Using Opening Differential of Double Gate of Shield Screw Conveyor

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(1. Zhejiang Huadong Surveying and Mapping and Engineering Safety Technology Co., Ltd., Hangzhou 310012,Zhejiang，China; 2. Huadong Engineering Corporation Limited, Hangzhou 310012, Zhejiang，China;3. Hefei Rail Transit Group Co., Ltd., Hefei 230001, Anhui, China; 4. Zhejiang Smart Rail Transit Engineering Technology Research Center, Hangzhou 310012, Zhejiang, China;[JP2]5. China Construction Eighth Engineering Division Rail Transit Construction Co., Ltd., Nanjing 210018, Jiangsu, China)

Online published: 2023-08-28

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摘要

为解决盾构在富水砂性土、砂卵石以及上软下硬复合地层因高承压富水而引发螺旋机喷涌问题，基于泥水通过闸口时流速与截面的关系、流速与截面成反比的原理，提出一种螺旋机双闸门开度差扩大排渣截面分级降压的施工技术。该施工技术可保证盾构掘进过程中螺旋机排渣的连续性，避免因排渣喷涌引起土舱积舱、失压导致刀盘磨损、地面塌陷等风险。该施工技术已在南宁地铁2号线明秀路站—秀厢站区间砂卵石富水地层得到应用，并取得良好效果，实现了盾构在该地层中的快速、连续掘进，降低了对地层的扰动，有效控制了地表沉降。双闸门开度差分级降压技术在高效性、经济性、操作性、安全性、实用性等方面具备明显优势。

关键词： 盾构施工; 开度差; 喷涌控制; 积舱; 双闸门; 分级降压; 受力特征

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丁二威, 骆介华, 刘少凯, 黄江华, 吴勇, 杨祥祥 , 任辉, 程绍恭, 赵云辉 . 利用盾构螺旋机双闸门开度差防喷涌施工技术[J]. 隧道建设, 2023 , 43(S1) : 493 -498 . DOI: 10.3973/j.issn.2096-4498.2023.S1.058

Abstract

In order to solve the gushing problem of shield screw conveyor caused by high pressure rich water in the waterrich sandy soil, sandy pebble, and upper soft and lower hard composite strata, according to the relationship and the inversely proportion principle between the flow rate that mud water passing through the gate and the cross section, a kind of construction technology is proposed. It adopts the opening differential of the double gates of screw conveyor to enlarge the cross section of deslagging and reduce the pressure step by step. The technology can ensure continuity of mucking for the screw conveyor during shield tunneling, which avoids the risks of the pileup in chamber caused by slag gushing, the cutterhead wear caused by loss of pressure, surface subsidence and so on. The technology was applied in the section between Mingxiu Road station and Xiuxiang station of Nanning metro line 2, realizing rapid and continuous excavation for shield tunneling in the sandy pebble waterrich strata, reducing the disturbance to the stratum and effectively controlling the ground subsidence. In all, the construction technology has obvious advantages in efficiency, economy, operability, safety, and practicability.

Key words： shield construction; opening differential; gushing control; pileup in chamber; double gate; stepbystep pressure reduction; stress characteristics

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