大断面马蹄形盾构施工关键技术——以蒙华铁路白城隧道工程为例

章龙管, 李志刚, 路桂珍, 谭江

doi:10.3973/j.issn.2096-4498.2020.S1.038

隧道建设 >

2020 , Vol. 40 >Issue S1: 297 - 306

DOI: https://doi.org/10.3973/j.issn.2096-4498.2020.S1.038

施工技术

大断面马蹄形盾构施工关键技术——以蒙华铁路白城隧道工程为例

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（1. 中铁工程服务有限公司, 四川成都 610083； 2. 西南交通大学机械工程学院, 四川成都 610031）

章龙管(1978—),男,安徽池州人,西南交通大学先进制造专业在读博士,高级工程师,现从事盾构与地下工程施工技术与管理工作。E-mail: zhanglongguan@cresc.cn。*通信作者: 谭江, E-mail: jiangtan820@163.com。

网络出版日期: 2020-09-16

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Key Construction Technology of Large Crosssection Horseshoeshaped Shield: a Case Study on Baicheng Tunnel on Menghua Railway

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(1. China Railway Engineering Services Co., Ltd., Chengdu 610083, Sichuan, China;  2. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)

Online published: 2020-09-16

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摘要

为解决大断面马蹄形土压平衡盾构施工面临的姿态难控制、泥饼、掘进困难等难题，以蒙华铁路白城隧道工程为依托，研究大断面马蹄形土压平衡盾构施工关键技术： 1）针对盾构始发难题，采取始发基座、洞门密封装置安装、始发参数控制、加强段明洞提供反力等措施，保证盾构顺利、安全始发。2）在盾构掘进时，采取分区控制油缸推力或往纠偏泥浆孔注入泥浆的措施，解决姿态难控制问题；通过在砂质黄土地层添加高分子聚合物，解决渣土改良不到位和出渣不畅问题；通过制定合理有效的掘进参数和精准测量方案，保证盾构安全下穿包茂高速。3）针对盾构刀盘底部开挖盲区问题，采取在刀盘底部增设圆锥形分渣器和增长刀盘辐条的措施，解决刀盘底部盲区导致的掘进困难问题。4）针对盾构到达技术，采取接收基座及接收端墙的正确安设措施，确保盾构安全接收。

关键词： 隧道; 马蹄形盾构; 盾构始发; 姿态控制; 渣土改良; 开挖盲区; 盾构到达

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章龙管, 李志刚, 路桂珍, 谭江 .

大断面马蹄形盾构施工关键技术——以蒙华铁路白城隧道工程为例

[J]. 隧道建设, 2020 , 40(S1) : 297 -306 . DOI: 10.3973/j.issn.2096-4498.2020.S1.038

Abstract

During the construction of large crosssection horseshoeshaped EPB shield, many problems such as attitude control difficulty, mud cake and tunneling difficulty, would be encountered. Hence, the key technologies for the construction of large crosssection horseshoeshaped EPB shield used in Baicheng Tunnel of Menghua Railway are studied. The study mainly focuses on follow aspects: (1) In order to guarantee smooth and safe launching of shield, measures such as launching base, portal sealing device, launching parameters control and counterforce provided by strengthened opencut tunnel are adopted. (2) The shield attitude is controlled by partition cylinder thrust or slurry injection; the soil conditioning effect is improved by high polymer; and the safe shield crossing underneath BaotouMaoming Experssway is guarantee by adopting rational tunneling parameters and measuring method. (3) The problem of blind area at the bottom of the cutterhead is solved by adding a cone slag separator and expanding the spokes of the cutterhead at the bottom of cutterhead. (4) The shield is safely recieived by correctly install the receiving based and endwall.

Key words： tunnel; horseshoeshaped shield; shield launching; attitude control; muck conditioning; blind area excavation; shield arriving

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