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车站洞门环梁与隧道管片连接螺栓的粘结-滑移

杨成 廖伟龙 宋同伟 耿萍 方勇

杨成, 廖伟龙, 宋同伟, 耿萍, 方勇. 车站洞门环梁与隧道管片连接螺栓的粘结-滑移[J]. 西南交通大学学报, 2022, 57(4): 876-885. doi: 10.3969/j.issn.0258-2724.20200703
引用本文: 杨成, 廖伟龙, 宋同伟, 耿萍, 方勇. 车站洞门环梁与隧道管片连接螺栓的粘结-滑移[J]. 西南交通大学学报, 2022, 57(4): 876-885. doi: 10.3969/j.issn.0258-2724.20200703
YANG Cheng, LIAO Weilong, SONG Tongwei, GENG Ping, FANG Yong. Bond-Slip of Connecting Bolts Between Tunnel Segments and Metro Station Portal Ring Beam[J]. Journal of Southwest Jiaotong University, 2022, 57(4): 876-885. doi: 10.3969/j.issn.0258-2724.20200703
Citation: YANG Cheng, LIAO Weilong, SONG Tongwei, GENG Ping, FANG Yong. Bond-Slip of Connecting Bolts Between Tunnel Segments and Metro Station Portal Ring Beam[J]. Journal of Southwest Jiaotong University, 2022, 57(4): 876-885. doi: 10.3969/j.issn.0258-2724.20200703

车站洞门环梁与隧道管片连接螺栓的粘结-滑移

doi: 10.3969/j.issn.0258-2724.20200703
基金项目: 四川省自然科学基金(22NSFSC0797);国家自然科学基金(51778537);四川省科技计划资助(2021YJ0054)
详细信息
    作者简介:

    杨成(1977—),男,副教授,博士,研究方向为生命线工程,E-mail:yangcheng_civil@foxmail.com

    通讯作者:

    方勇(1981—),男,教授,博士,研究方向为复杂条件交通隧道工程建设与营运技术,E-mail:fy980220@home.swjtu.edu.cn

  • 中图分类号: U231.3

Bond-Slip of Connecting Bolts Between Tunnel Segments and Metro Station Portal Ring Beam

  • 摘要:

    地铁车站洞口的混凝土环梁与隧道管片之间一般通过螺栓连接,螺栓往往以预埋的方式锚入车站环梁内,并且与握裹它的混凝土之间存在粘结-滑移变形,这对环缝张开宽度和环梁结构损伤发展都可能产生影响,为进一步明确其中的机理及影响程度,参考既有的粘结-滑移本构模型,利用可细化分析粘结-滑移的有限元分析平台,在充分考虑材料非线性特征的基础上,针对3种不同型号螺栓,分别考虑锚固长度足够和不足两种情况,分析了螺栓在环梁内的粘结-滑移,以及环缝宽度增大的过程;通过量化分析粘结应力和螺栓应力沿螺栓长度的分布,揭示了粘结-滑移对环缝宽度发展的影响机制. 分析表明:采用粘结-滑移模型时,得到的螺栓连接刚度介于嵌固模型和弹簧模型之间,粘结-滑移变形对盾构管片和车站环梁之间环缝宽度的影响不可忽略;仅考虑受拉影响,即便在锚固长度足够的情况下,当螺栓接近屈服时,螺栓与环梁间的粘结-滑移变形在环缝张开宽度中占比最大可达30%,螺栓屈服后,这个滑移占比会随环缝扩展降至8%以下,受此影响,考虑粘结-滑移的螺栓抗拉刚度最低约为完全嵌固模型的1/3.

     

  • 图 1  站台附近隧道纵向累计沉降

    Figure 1.  Accumulated longitudinal settlement of the tunnel near the platform

    图 2  隧道-环梁粘结锚固示意

    Figure 2.  Diagram of tunnel-ring beam bonded anchorage

    图 3  粘结-滑移示意

    Figure 3.  Diagram of bond-slip between the bolt and ring beam concrete

    图 4  材料本构及界面单元

    Figure 4.  Material constitutions and interface units

    图 5  本文模拟方法与钢筋拔出标准试验对比

    Figure 5.  Comparison of band-slip results of rebars between the proposed simulation method and the standard test

    图 6  隧道-环梁连接段

    Figure 6.  Connection area between tunnel and ring beam

    图 7  隧道洞口构造

    Figure 7.  Structural drawing of platform entrance of tunnel

    图 8  不同环缝张开宽度下的螺栓应力状态

    Figure 8.  Stress states of bolts with different opening widths

    图 9  沿螺栓预埋深度的应力分布

    Figure 9.  Stress distribution along the embedded depth of the bolt

    图 10  滑移占比

    Figure 10.  Contribution of slip to the width of gap

    图 11  锚固长度充分时的螺栓拉应力分布

    Figure 11.  Tensile stress distribution of bolts in the case of long anchorage

    图 12  锚固长度充分时的螺栓粘结应力分布

    Figure 12.  Bonding stress distribution of bolts in case of long anchorage

    图 13  5.6级螺栓受拉时的混凝土裂缝分布

    Figure 13.  Cracks pattern of ring beam with M5.6 bolt embedded under tension

    图 14  环缝张开与螺栓应力关系

    Figure 14.  Relationship between opening width of ring joints and bolt stress

    图 15  锚固长度足够时环缝宽度的滑移占比

    Figure 15.  Slip ratio under long anchorage condition

    表  1  某城市地铁站台附近隧道测点曲率半径分布情况

    Table  1.   Statistics of measurement results of curvature radius of tunnel near platform in a city %

    站台
    名称
    R >
    15.0 km
    5.0 km < R ≤ 15.0 km2.5 km < R ≤ 5.0 kmR
    2.5 km
    A 83.00 11.14 4.00 1.86
    B 88.43 8.29 2.42 0.86
    C 90.43 7.14 2.29 0.14
    D 92.85 6.14 0.72 0.29
    E 88.57 8.86 2.43 0.14
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出版历程
  • 收稿日期:  2020-10-19
  • 修回日期:  2021-03-02
  • 网络出版日期:  2021-03-05
  • 刊出日期:  2021-03-05

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