Abstract：Research purposes: There are many uncertainties in the construction of shield directly cutting pile，the technology is not mature enough． In this thesis，relying on the actual project，the experience and the technical parameters of the construction aspects of the shield directly over the pile were summed up for further study of the shield directly over the pile technology to make a direct reference for similar projects．
Research conclusions: Through the study of the problem，such conclusions are obtained: ( 1 ) To control the the incisions pressure fluctuations in the value of less than 0． 1 bar; ( 2) Difference of the slurry flow and the promoting speed should be match，at the same time ，to control the amount of overbreak; ( 3) The thrust should be in the range of 9 500 ～ 100 000 kN; Shield driving speed is controlled at 10 ～ 20 mm / min． Cutter speed in control of 1． 0 ～ 1． 2 rpm / min is appropriate，and at the same time to control the cutter torque between the range of 0． 9 ～ 1． 2 MN?m．
黄怀朋. 复杂地质条件下泥水盾构过群桩施工技术研究[J]. 铁道工程学报, 2012, 29(5): 63-68.
HUANG Huai － peng. Research on Construction Technology of Slurry Shield through the Pile Group under Complicated Geological Conditions. 铁道工程学报, 2012, 29(5): 63-68.
Ma Zhongzheng，Ma Xianfeng，Xu Qianwei，etc． Study on Pile Underpinning and Removing Technology of Shield Machine Crossing through Pile Foundations of Road Bridge ［J］． Chinese Journal of Underground Space and Engineering，2010( 1) : 60 － 64．
Meng Qingjun． Construction Technology of Underpinning of Pile Foundations in Water: a Case in Construction of Chengdu Metro ［ J ］． Tunnel Construction，2011( 1) : 31 － 34．
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Wang Mengshu． Construction Method of Undercutting under Shallow Overburden for Underground Works ［M］． Hefei: Anhui Education Press，2005．
Xin Zhenxing． Research on the Mechanical Behavior of Construction of Shield Excavating through the Approaching Pile Foundation of Pier［J］． Journal of Railway Engineering Society，2008( 5) : 72 － 75．
Yang Xiaojie，Deng Feihuang，Nie Wen，etc． Study on Effect of Metro Unnelling on Carrying Capacity of Pile Foundation［J］． Chinese Journal of Rock Mechanics and Engineering，2006( 6) : 1290 － 1295．
Tu Qiang． Estimation of Deformation Control for Large Axial Force Pile Foun2dation Underp Inning ［J］． Journal of Railway Engineering Society，2008( 2) : 26 －30
2012, Vol. 29 
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