顶管电缆隧道施工对邻近建筑物和地下管线的扰动影响
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国家电网公司科技项目


Effect of Pipe Jacking Cable Tunnel Construction on Adjacent Buildings and Underground Pipelines in Soft Clay Areas
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    摘要:

    通过离心机模型试验和有限元数值模拟方法研究了软土地区顶管电缆隧道施工对邻近浅基础建筑物和地下管线的扰动影响。首先,通过离心机物理模型试验,对顶管电缆隧道施工过程中地层损失率变化对邻近浅基础建筑物和地下管线的影响进行了定性分析;然后,基于PLAXIS 3D有限元软件,构建有限元计算模型,将数值计算结果与离心机试验数据进行对比分析;最后,对不同工况下顶管电缆隧道施工对邻近浅基础建筑物和地下管线的扰动影响规律进行数值分析。研究结果表明:随着地层损失率和顶管隧道管径的增大,顶管电缆隧道施工对邻近浅基础建筑物和地下管线的扰动影响增大,且地下管线刚度的增加可以有效减小邻近顶管隧道施工的影响;随着顶管隧道与建筑物、管线之间的间距增大,顶管电缆隧道施工对邻近浅基础建筑物和地下管线的扰动影响越小。研究结果可为软黏土地区顶管电缆隧道的施工提供一定参考价值。

    Abstract:

    Centrifuge model tests and finite element simulation methods were used to study the impact of pipe jacking cable tunnel construction in soft soil areas on adjacent shallow foundation buildings and underground pipelines. First, the centrifuge physical model test was performed to qualitatively analyze the influence of the change in the ground loss rate during the construction of the pipe jacking cable tunnel on the adjacent shallow foundation buildings and underground pipelines. Then, the finite element model was constructed to compare the numerical results with the centrifuge test data. Finally, a series of numerical calculations were carried out to analyze the disturbance influence law of pipe jacking cable tunnel construction on adjacent shallow foundation buildings and underground pipelines under different working conditions. The research results show that with the increase of the ground loss rate and pipe jacking tunnel diameter, the impact of pipe jacking cable tunnel construction on adjacent shallow foundation buildings and underground pipelines increases, and the increase in the stiffness of underground pipelines can effectively reduce the adjacent Impact of pipe jacking tunnel construction; The larger the distance between the pipe jacking tunnel and the adjacent structure, the less the disturbance impact of the pipe jacking cable tunnel construction on the adjacent shallow foundation buildings and underground pipelines. The research results can provide certain reference value for the construction of pipe jacking cable tunnel in soft clay soil area.

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马险峰,陈飞,吴冰,等. 顶管电缆隧道施工对邻近建筑物和地下管线的扰动影响[J]. 科学技术与工程, 2021, 21(21): 9074-9080.
Ma Xianfeng, Chen Fei, Wu Bing, et al. Effect of Pipe Jacking Cable Tunnel Construction on Adjacent Buildings and Underground Pipelines in Soft Clay Areas[J]. Science Technology and Engineering,2021,21(21):9074-9080.

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  • 收稿日期:2020-12-03
  • 最后修改日期:2021-02-28
  • 录用日期:2021-03-19
  • 在线发布日期: 2021-08-11
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