文章摘要
柳军修,陈军,曹广勇,廖云,崔立志.深埋顶管长距离穿越无水砂层三维数值模拟[J].安徽建筑大学学报,2020,28(1):1-6
深埋顶管长距离穿越无水砂层三维数值模拟
Three-dimensional Numerical Simulation of a Deep-buried Pipe JackingLong-distance Traversing Anhydrous Sand Layer
  
DOI:10.11921/j.issn.2095-8382.20200101
中文关键词: 无水砂层  深埋顶管  长距离施工  数值模拟
英文关键词: anhydrous sand layer  deep-buried pipe-jacking  numerical simulation  long-distance traversing
基金项目:国家自然科学基金资助项目(51608005);企业委托科研项目(AJ-CXY-FW-18-20-2,SGAHJYJSXLJS1800417)。
作者单位
柳军修 安徽建筑大学建筑结构与地下工程安徽省重点实验室安徽合肥230601安徽建筑大学土木工程学院安徽合肥230601 
陈军 中铁四局集团有限公司市政工程分公司安徽合肥230023 
曹广勇 安徽建筑大学建筑结构与地下工程安徽省重点实验室安徽合肥230601安徽建筑大学土木工程学院安徽合肥230601 
廖云 中铁四局集团有限公司市政工程分公司安徽合肥230023 
崔立志 中铁四局集团有限公司市政工程分公司安徽合肥230023 
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中文摘要:
      基于大口径深埋顶管长距离穿越无水砂层现场试验,采用FLAC3D 建立三维精细化数值模型,分析顶 管顶进及管节与周围砂层相互作用,研究结果表明:顶管施工引起工作井处顶部土层沉降,接收井处土层隆 起;注浆能有效降低施工引起的土层变形,且优化浆液较未注浆工况降低土层变形约为80%,较常规浆液工 况降低土层变形约为68%;顶管隧道轴力在管节工作井位置最大,接收井位置最小,沿顶管轴向呈近似线性 分布;注浆能有效降低施工顶力,优化浆液最大顶力较未注浆工况降低约为83%,较常规浆液工况降低约为 43%。
英文摘要:
      Based on field test of a deep-buried pipe-jacking long-distance traversing anhydrous sand layer,an three-dimensional numerical modelling was conducted to investigate the pipe jacking and interaction between pipe and surrounding sand layer. The results indicate that pipe jacking construction causes the settlement of the top soil layer at the working well and the uplift of the soil layer at the receiving well. Grouting can effectively reduce soil deformation caused by construction, and the optimized grouting reduces the soil deformation by about 80% compared with the non-grouting condition and 68% compared with the conventional grouting condition. Axis force of pipe jacking tunnel is the largest in the working well of pipe joint and the smallest in the receiving well,which distributes approximately linearly along the pipe jacking axis. Grouting can effectively reduce the construction jacking force. The optimum grouting maximum jacking force is reduced by about 83% compared with the non-grouting condition and 43% compared with the conventional grouting condition.
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