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基于增量法钢板桩围堰的安全性计算方法

戴良军 朱大勇

戴良军, 朱大勇. 基于增量法钢板桩围堰的安全性计算方法[J]. 交通运输工程学报, 2016, 16(6): 39-47.
引用本文: 戴良军, 朱大勇. 基于增量法钢板桩围堰的安全性计算方法[J]. 交通运输工程学报, 2016, 16(6): 39-47.
DAI Liang-jun, ZHU Da-yong. Security calculation method of steel sheet pile cofferdam based on incremental method[J]. Journal of Traffic and Transportation Engineering, 2016, 16(6): 39-47.
Citation: DAI Liang-jun, ZHU Da-yong. Security calculation method of steel sheet pile cofferdam based on incremental method[J]. Journal of Traffic and Transportation Engineering, 2016, 16(6): 39-47.

基于增量法钢板桩围堰的安全性计算方法

基金项目: 

国家自然科学基金项目 51378168

详细信息
    作者简介:

    戴良军(1963-), 男, 安徽固镇人, 合肥工业大学工学博士研究生, 从事道路与基坑工程研究

    朱大勇(1965-), 男, 安徽枞阳人, 合肥工业大学教授, 工学博士

  • 中图分类号: U443.162

Security calculation method of steel sheet pile cofferdam based on incremental method

More Information
    Author Bio:

    DAI Liang-jun(1963-), male, doctoral student, +86-551-62865059, 2765095113@qq.com

    ZHU Da-yong(1965-), male, professor, PhD, +86-551-62901966, zhudymeng@163.com

  • 摘要: 分析了现有的钢板桩计算理论, 计算了钢板桩围堰的土压力、静水压力、流水压力、波浪力与支撑力; 分析了钢板桩围堰的施工工序, 将钢板桩视为非线性弹性地基梁, 建立了基于增量法的非线性弹性地基梁挠曲微分方程, 计算了地基土水平抗力系数、钢板桩弯曲变形系数与内外荷载增量, 研究了钢板桩围堰各工况下受力与变形; 基于裕溪河大桥桥墩基础的钢板桩围堰, 验算了钢板桩围堰的内力、变形、强度、整体稳定性、抗倾覆安全性与抗隆起安全性。计算结果表明: 钢板桩最大位移为38.12 mm, 小于规范值80 mm; 钢板桩最大许用应力为168.60 MPa, 小于规范值218.52 MPa; 管桩最大许用应力为112.29 MPa, 小于规范值174.07 MPa; 钢板桩围堰整体稳定安全系数为2.8, 大于规范值1.3;4种工况下抗倾覆安全系数分别为3.4、2.8、2.9、1.9, 大于规范值1.2;根据普朗德尔理论与太沙基理论计算的抗隆起安全系数分别为3.1和3.5, 大于规范值1.6。可见, 基于增量法钢板桩围堰的安全性计算结果满足相关规范要求, 计算方法合理、可靠。

     

  • 图  1  24、25号墩施工平面

    Figure  1.  Construction planes of piers 24, 25

    图  2  钢板桩围堰平面

    Figure  2.  Floor plan of steel sheet pile cofferdam

    图  3  24号墩支撑剖面

    Figure  3.  Support profile of pier 24

    图  4  钢板桩围堰施工工序

    Figure  4.  Construction processes of steel sheet pile cofferdam

    图  5  钢板桩围堰施工工艺流程

    Figure  5.  Construction procedures of steel sheet pile cofferdam

    图  6  工况1时的受力与变形

    Figure  6.  Forces and deformations in case 1

    图  7  工况2时的受力及变形

    Figure  7.  Forces and deformations in case 2

    图  8  工况3时的受力及变形

    Figure  8.  Forces and deformations in case 3

    图  9  工况4时的受力及变形

    Figure  9.  Forces and deformations in case 4

    图  10  沿深度方向位移分布

    Figure  10.  Displacement distributions along depth direction

    图  11  沿深度方向弯矩分布

    Figure  11.  Moment distributions along depth direction

    表  1  24号墩围檩结构特征

    Table  1.   Structure characteristics of prulin for pier 24

    下载: 导出CSV

    表  2  各土层物理力学参数

    Table  2.   Physical and mechanical parameters of soil layers

    下载: 导出CSV

    表  3  土压力系数

    Table  3.   Coefficients of soil pressures

    下载: 导出CSV

    表  4  钢板桩围堰的计算结果

    Table  4.   Calculation results of steel sheet pile cofferdam

    下载: 导出CSV
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  • 收稿日期:  2016-06-21
  • 刊出日期:  2016-12-25

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