Abstract：Aiming at the problem of partially or integrally upward moving of tunnel segments during shield tunnel construction，based on the two metro shield tunnel project cases in which the great upward moving occurs in Ningbo，the field test of shield construction parameters，such as tunneling speed，vertical component force of reaction force of total thrust，synchronized grouting pressure and grout proportion，is conducted in the section that the external conditions(formation characteristic and burial depth) are similar. And combined with the monitoring data in the test section，the influence law of aforementioned single factor on segments upward moving during construction is analyzed. The results show that the amount of segment upward moving increases，when the grouting pressure of the lower segment is higher than that of the upper part. When the pressure difference is up to 0.3 MPa，the amount of upward moving increases about 20 mm. On the basis of little change of reaction force of the total thrust，when its vertical component force increases，the amount of upward moving raises correspondingly. When the component force increases by 260 kN，the amount of segment upward moving grows greater to about 15 mm. Keeping the same amount of cementitious material and mixing in equivalent non-cementitious material during synchronized grouting，the compression strength and cohesion of grout improve，the initial setting time shortens and the segment moves less higher with the reduction of ash cement ratio and water cement ratio. When the relative addition of cement in every 3 m3 of grout increases by 100 kg，the amount of segment upward moving decreases by 19.8 mm. the tunnelling speed，alone，has no distinct impact on upward moving of segments during construction.
季 昌，周顺华，许 恺，李晓龙. 盾构隧道管片施工期上浮影响因素的现场试验研究[J]. 岩石力学与工程学报, 2013, 32(s2): 3619-3626.
JI Chang，ZHOU Shunhua，XU Kai，LI Xiaolong. FIELD TEST RESEARCH ON INFLUENCE FACTOR OF UPWARD MOVING OF SHIELD TUNNEL SEGMENTS DURING CONSTRUCTION. , 2013, 32(s2): 3619-3626.
叶 飞，朱合华，丁文其. 考虑管片环间接头效应的盾构隧道抗浮计算与控制分析[J]. 中国公路学报，2008，21(3)：76-80.(YE Fei，ZHU Hehua，DING Wenqi. Calculationfor anti-buoyancy and control analysis of shield tunnel considering effect of joint of segment rings[J]. ChinaJournalofHighwayandTransport，2008，21(3)：76-80.(in Chinese))
[2]
张海涛. 盾构同步注浆材料试验及隧道上浮控制技术[硕士学位论文][D]. 上海：同济大学，2007：56-58.(ZHANG Haitao. Study on the proportioning of tail void grouting material and up floating control of shield tunnel[M. S. Thesis][D].Shanghai：Tongji University，2007：56-58.(in Chinese))
[3]
郭宏宇，杨海东. 下坡盾构到达段上浮原因及措施[J]. 现代隧道技术，2010，47(2)：74-77.(GUO Hongyu，YANGHaidong. Analysis of floating and countermeasures for shield driving on down-slope approaching section[J]. Modern Tunnelling Technology，2010，47(2)：74-77.(in Chinese))
[4]
沈征难. 盾构掘进过程中隧道管片上浮原因分析及控制[J]. 现代隧道技术，2004，41(6)：51-56.(SHEN Zhengnan. Analysis and control of the upward moving of tunnel segments in the process of shield exeavation[J]. Modem Tunnelling Technology，2004，41(6)：51-56.(in Chinese))
[5]
常 江，赵 一，王 岩. 盾构隧道管片上浮原因分析及控制措施[J]. 市政技术，2010，28(3)：123-125.(CHANGJiang，ZHAOYi，WANGYan. Causes analysis and the control measures of floating upward of shield tunnel segments[J]. MunicipalEngineeringTechnology，2010，28(3)：123-125.(in Chinese))
[6]
THOMASK，GÜNTHER M. On the influence of face pressure，grouting pressure and TBMdesign in soft ground tunnelling[J]. Tunnelling and Underground Space Technology，2006，21(1)：160-171.
[7]
李云丽. 盾构隧道施工过程管片结构受力特征研究[硕士学位论文][D]. 北京：北京交通大学，2008：6.(LI Yunli. Study on mechanical characteristic of lining segment in the construction of shield tunnel[M. S. Thesis][D]. Beijing：Beijing Jiaotong University，2008：6.(in Chinese))
[8]
沈林冲，钟小春，秦建设，等. 钱塘江盾构越江隧道最小覆土厚度的确定[J]. 岩土力学，2011：32(1)：111-115.(SHEN Linchong，ZHONG Xiaochun，QIN Jianshe，et al. of Determination minimum thickness of overburden layer forshield tunnel through Qiantang River[J]. Rock and Soil Mechanics，2011：32(1)：111-115.(in Chinese))
[9]
张厚美，古 力. 盾构机姿态参数的测量及计算方法研究[J]. 现代隧道技术，2004，42(2)：14-20.(ZHANG Houmei，GU Li. On the measurementand the method of computationof the posture parametersof shields[J]. Modern Tunneling Technology，2004，42(2)：14-20.(in Chinese))
[10]
张海波. 地铁隧道盾构法施工对周围环境影响的数值模拟[博士学位论文][D]. 南京：河海大学，2005：27-28.(The simulation of the metro shield tunneling constructioneffect on the surroundingenvironment [Ph. D. Thesis][D].Nanjing：Hohai University，2005：27-28.(in Chinese))
[11]
贺雄飞，王光辉. 单液活性同步注浆浆液的配合比试验[J]. 隧道建设，2010，30(1)：9-14.(HE Xiongfei，WANG Guanghui. Study on mixing proportion of single-component active grout for simultaneousgrouting[J]. Tunnel Construction，2010，30(1)：9-14.(in Chinese)
[12]
梁精华. 盾构隧道壁后注浆材料配比优化及浆体变形特性研究[硕士学位论文][D]. 南京：河海大学，2006：30-36.(LIANG Jinghua. Study on the proportionof backfill-grouting materials and grout deformation properties of shield[M. S. Thesis][D]. Nanjing：Hohai University，2006：30-36.(in Chinese))
[13]
BEZUIJEN A，TALMON AM. Grout properties and their influence on back fill grouting[C]// Geotechnical Aspects of Underground ConstructioninSoft GroundProceedings of the 5th International Symposium TC28. Netherlands：[s.n.]，2005.
2013, Vol. 32 
