上海软土地层盾构始发施工技术

鲍永亮; 郑七振; 唐建忠

PDF(289 KB)

铁道工程学报 ›› 2010, Vol. 27 ›› Issue (3) : 118-122.

路网研究

上海软土地层盾构始发施工技术

鲍永亮1；郑七振2；唐建忠3

作者信息 +

Technology for Originating Construction of Shield Tunnel in Soft Soil Stratum in Shanghai

BAO Yong-liang1, ZHENG Qi-zhen2, TANG Jian-zhong3

Author information +

文章历史 +

摘要

研究目的：在城市隧道施工过程中,始发往往成为盾构施工成败的关键环节之一。本文通过对土体加固方法、导轨设置、反力系统的安装、验算等进行分析研究,选择合理的始发掘进参数,保证施工质量。

研究结论：(1)始发洞口地基采用φ1 000三重管高压旋喷桩进行加固,并按0.5% ～1%比例钻芯取样,经试验测得28 d无侧限抗压强度大于0.8MPa,确保了土体的稳定性; (2)在始发洞内安设洞口始发导轨保证了盾构在始发时不致于因刀盘悬空而产生盾构“叩头”现象; (3)土仓压力略高于前方土体压力,防止了盾构脱离始发基座后的“叩头”现象及并且有效地避免了地表产生过大沉降; (4)通过对始发反力架进行力学验算,确保了盾构始发过程的安全性。

Abstract

Research purposes：Originating is one of key links of the successful construction of tunnel in city. This paper researches the method of earth reinforcement, installation of guide rail, installation and check calculation for reaction force system so as to select the reasonable parameters of preliminary boring and guarantee the construction quality.

Research conclusions：(1) The foundation of the originating tunnel portal was reinforced with φ1 000 triple tube high-pressure churning jet pile and the boring earth core for sampling with proportion of 0.5%-1% was conducted. The unconfined compression strength tested in the experiment was more than 0.8MPa and it could ensure the earth stability. (2) The portal originating guide-rail was installed in the originating tunnel portal to avoid the appearance of "knotow" of shield machine because the cutter head of the shield machine was hanging while the shield machine was originating. (3) The pressure of earth chamber was bigger than that of earth ahead. In this way, the "knotow" of the shield machine after the machine disengaging from the originating base and the over-big ground subsidence were avoided. (4) The safety of the originating process of shield was ensured though the check and calculation of the mechanics of the reaction shelf.

导出引用

鲍永亮, 郑七振, 唐建忠. 上海软土地层盾构始发施工技术[J]. 铁道工程学报, 2010, 27(3): 118-122

BAO Yong-liang, ZHENG Qi-zhen, TANG Jian-zhong. Technology for Originating Construction of Shield Tunnel in Soft Soil Stratum in Shanghai[J]. Journal of Railway Engineering Society, 2010, 27(3): 118-122

中图分类号： U455

参考文献

[ 1 ] 周文波.盾构法隧道施工技术及应用[M ].北京:中国建筑工业出版社, 2004.

Zhou Wenbo. Construction Technology and Application for Shield Tunnel[M]. Beijing: China Architechture & Building Press, 2004.

[ 2 ] 秦汉礼.软弱地层盾构始发施工技术[J].隧道建设,2006(增刊): 15 -21.

Qin Hanli. Launching Technology of Shield Machine in Soft G round [ J ]. Tunnel Construction, 2006 (Supplement): 15 -21.

[ 3 ] 陈涛,袁传旭.盾构始发技术在沈阳地铁一号线中的应用[J].企业技术开发, 2007(7): 47 -50.

Chen Tao, Yuan Chuanxu. Application of Originating Technique for the Shield Structure in 1# Line of Shenyang Underground[J]. Technological Development Of Enterprise, 2007(7): 47 -50.

[ 4 ] 鲍永亮,郑七振,唐建忠.地铁隧道旁通道冻结法施工监测分析[J].铁道工程学报, 2009(3): 93 -95.

Bao Yongliang, Zheng Qizhen, Tang Jianzhong. Monitoring Analysis of Construction for Connecting Aisle in Metro Tunnel with Freezing Method [ J ]. Journal of Railway Engnieering Society, 2009(3): 93 -95.

[ 5 ] 鲍永亮,郑七振,唐建忠.上海地铁10号线某旁通道冻结法施工技术[J].施工技术, 2009(9): 8 -10.

Bao Yongliang, Zheng Qizhen, Tang Jianzhong. Freezing Construction Technology of Some Connecting Aisle in Shanghai Metro Line 10 [J ]. Consrructiong Technology, 2009(9): 8 -10.

[ 6 ] 鲍永亮,郑七振,唐建忠.盾构隧道穿越既有建筑物施工技术[J].铁道建筑, 2009(4): 52 -54.

Bao Yongliang,Zheng Qizhen,Tang Jianzhong. Construction Technology for Metro Shield Tunnel Traversing under Existing Structures[J]. Railway Engineering, 2009(4): 52 -54.

[ 7 ] 鲍永亮,郑七振,唐建忠,等.地铁盾构隧道施工监测技术[J].铁道建筑, 2009(5): 44 -47. Bao Yongliang, Zheng Qizhen, Tang Jianzhong, etc. Monitor Technology for Shield Tunnel Construction[J]. Railway Engineering, 2009(5): 44 -47.
[ 8 ] 鲍永亮,郑七振,唐建忠.软土地层矩形顶管推进施工措施分析[J].铁道建筑, 2009, (8): 75 -78.

Bao Yongliang, Zheng Qizhen, Tang Jianzhong. Analysis for Soft soil Stratum Rectangular Pipe Kacking Construction Mesure[J]. Railway Engineering, 2009(8):75-78.

[ 9 ] 鲍永亮,郑七振,王娟,等.上海软土地层地下通道矩形顶管施工技术[J].铁道建筑, 2009(9): 68-70.

Bao Yongliang, Zheng Qizhen, Wang Juan, etc. Rectangular Pipe Jacking Construction Technology Applied to Underground Aisle in Shanghai Soft Soil Stratum [J]. Railway Engineering, 2009(9): 68-70.

[ 10 ] 于澎涛.南水北调中线穿黄隧洞盾构始发技术[J].南水北调与水利科技, 2008(4): 54 -57.

Yu Pengtao. Starting up Construction Technology with Shield Machine in the Yellow River Crossing Tunnel of the Middle Route Project of South-to-North Water Diversio[J]. South-to-North Water Transfers and Water Science & Technolog, 2008(4): 54-57.