肖昭然，张洋，蒋敏敏,等.粉土地层中盾构施工对临近高铁桥桩的影响[J].河南理工大学学报（自然科学版）,2020,39(1):141-148.

XIAO Z R, ZHANG Y, JIANG M M, et al.Influence of shield construction on adjacent high-speed railway bridgepiles in silty soil layer[J].Journal of Henan Polytechnic University(Natural Science) ,2020,39(1):141-148.

粉土地层中盾构施工对临近高铁桥桩的影响

肖昭然，张洋，蒋敏敏，刘海军

河南工业大学土木建筑学院，河南郑州450000

摘要:针对地铁盾构隧道近接高铁桥桩施工的影响问题，以郑州西区地铁隧道侧穿高铁桥桩为 工程背景，对周围土层和桥墩位移进行现场实测，并采用ABAQUS数值模拟软件，对盾构侧穿施工全过程进行动态模拟，研究了土层注浆加固措施对于土层位移及桥桩位移和内力的影响。结果表明：盾构侧穿高铁桥桩会使桥桩在盾构隧道埋深处的桩身产生最大水平位移、弯矩和侧摩阻力；对穿越区域土层先行注浆加固后再进行穿越，可大幅降低盾构施工桥桩的扰动，桥墩最大沉降量降低约72. 6%，桩体水平位移、弯矩及侧摩阻力最大值分别降低58. 3%、37. 6%和 23. 7% ；土层注浆加固施工工艺对桥墩的保护作用明显，说明加固方案可行。现场实测数据与数值模拟结果规律一致，验证了使用ABAQUS模拟盾构施工对高铁桥桩的影响是可靠的。

关键词:粉土地层;盾构隧道;注浆加固;高铁桥桩;桩体变形

doi:10.16186/j.cnki.1673-9787.2020.1.18

基金项目:河南省科技厅自然科学基金资助项目（162102210188 ， 152107000008 ）；河南省教育厅自然科学基金资助项目 （16A560003，15A560020）

收稿日期:2019/04/06

修回日期:2019/05/19

出版日期:2020/01/15

Influence of shield construction on adjacent high-speed railway bridgepiles in silty soil layer

XIAO Zhaoran, ZHANG Yang, JIANG Minmin, LIU Haijun

School of Civil Engineering and Architecture， Henan University of Technology， Zhengzhou 450000 ， Henan， China

Abstract:Aiming at the construction problem of high-speed railway bridge in the subway shield tunnel， the high-speed railway bridge of Zhengzhou West District subway tunnel was used as the engineering background， and the displacement of the surrounding soil layer and pier was measured in the field. The ABAQUS numerical simulation software was used to simulate the process of crossing the shield. The dynamic simulation of the construction process was carried out to study the effects of soil grouting reinforcement measures on soil displacement and displacement and internal forces of bridge piles. The results showed that the shield side-crossing high-speed railway pile would cause the maximum horizontal displacement， bending moment and side friction resistance of the pile at the buried depth of the shield tunnel. After the grouting and strengthening of the traversing area， the traversing could be greatly reduced. The maximum settlement of the bridge pier was reduced by 72. 6% ， and the maximum horizontal displacement， bending moment and side friction resistance of the pile were reduced by 58. 3% ， 37. 6% and 23. 7% respectively. The soil layer grouting reinforcement construction process had obvious protection effect on the pier， and this reinforcement scheme was feasible. The field measured data was consistent with the numerical simulation results， which proved that the impact of using ABAQUS to simulate shield construction on high-speed railway bridge piles was reliable.

Key words:silty soil layer;shield tunnel;grouting reinforcement;high-speed railway bridge pile;pile deformation

粉土地层中盾构施工对临近高铁桥桩的影响_肖昭然.pdf