2010年1月 施工技术 第39卷第1期 CONSTRUCTION TECHNOLOGY 55 富水砂卵石地层土压平衡盾构带压换刀技术 章慧健，仇文革1，胡辉1，钟山2 (1.西南交通大学土木工程学院，四川成都610031；2.中国中铁二局集团有限公司，四川成都610031) [摘要]成都地铁1号线的盾构掘进表明，在砂卵石地层中开挖刀具的磨耗非常严重，平均120-150m需全面更换 一次刀具.结合成都地铁1号线盾构3标项目，对浅埋富水砂卵石地层条件下的土压平衡盾构带压换刀技术进行 了有益尝试并获得成功，从而形成了相关成套技术.主要包括带压换刀工作气压值的经验计算公式，影润土泥浆 的配合比和制备流程，以及按“到达预定换刀地点前”、“到达时”、“换刀结束后的恢复掘进”三阶段控制的施工工 艺. [关键词]隧道工程；富水砂卵石地层；土压平衡盾构；带压作业；膨润土泥浆 [中图分类号]U455.43 [文献标识码]A [文章编号]1002-8498(2010)01-0055-04 Changing Cutter Tools Technology of Earth Pressure Balance Shield in Water-rich Sandy Gravel Stratum Under Pressure Zhang Huijian' Qiu Wen'ge' Hu Hui' Zhong Shan2 (1.School of Civil Engineering Southwest Jiaotong University Chengdu Sichuan 610031 China; 2.China Railway No.2 Engineering Group Co. Lad.Chengdu Sichuan 610031 China) Abstract:In excavation of Chengdu Metro Line 1 the cutter tools of earth pressure balance shield are seriously worn in sandy gravel stratum.Generally the cutter tools should be changed after excavating less than 150 meters.Based on construction of bid 3 of Chengdu Metro Line 1 authors take tests to change cut tools of earth pressure balance shield in water-rich sandy gravel stratum under pressure which finally resulting in success.The related integrated techniques mainly include experience formula of working pressure value mixture ratio and preparing process of bentonite slurry and the operation techniques corresponding with different phases. Key words:tunnel engineering;water-rich sandy gravel stratum;earth pressure b...
富水砂卵石地层土压平衡盾构带压换刀技术.pdf
