朱艳, 石振明, 卢耀如, 等. 2021. 海岸带特殊地质条件下双排钢板桩适用性案例分析[J].工程地质学报, 29(6): 1849-1861. doi: 10.13544/j.cnki.jeg.2021-0370.
    引用本文: 朱艳, 石振明, 卢耀如, 等. 2021. 海岸带特殊地质条件下双排钢板桩适用性案例分析[J].工程地质学报, 29(6): 1849-1861. doi: 10.13544/j.cnki.jeg.2021-0370.
    Zhu Yan, Shi Zhenming, Lu Yaoru, et al. 2021. Applicability analysis of double steel sheet pile under special geological conditions in coastal zone[J].Journal of Engineering Geology, 29(6): 1849-1861. doi: 10.13544/j.cnki.jeg.2021-0370.
    Citation: Zhu Yan, Shi Zhenming, Lu Yaoru, et al. 2021. Applicability analysis of double steel sheet pile under special geological conditions in coastal zone[J].Journal of Engineering Geology, 29(6): 1849-1861. doi: 10.13544/j.cnki.jeg.2021-0370.

    海岸带特殊地质条件下双排钢板桩适用性案例分析

    APPLICABILITY ANALYSIS OF DOUBLE STEEL SHEET PILE UNDER SPECIAL GEOLOGICAL CONDITIONS IN COASTAL ZONE

    • 摘要: 双排钢板桩结构是由两排钢板桩、桩间土和拉杆组成的挡土、止水复合结构,由于其较土石围堤占地面积小、施工速度快,较钢板桩整体性好,抗地震和波浪等动力稳定性好,在水利、水运、海岸工程中广泛应用。但由于钢板桩受地质条件影响较大,其使用效果和投入成本不尽相同。本文重点搜集和调查了国内外海岸带工程中使用双排钢板桩的工程案例,分别针对岩溶发育的岩性地基,高渗透性的砂性地基和深厚淤泥质软土地基对双排钢板桩的性能影响和设计约束进行分析。结合原有地质条件和设计资料,采用有限元软件补充计算分析,分析研究在各种不同类型的工程地质条件和水文条件下双排钢板桩的应用效果,总结双排钢板桩在海岸带不同工程地质条件下的适用性。发现在岩溶发育地层施工双排钢板桩需要防止打桩造成垂直度差和岩溶连通性带来的渗漏问题;在砂土地层需要防止钢板桩倾斜变形造成锁扣止水性能劣化,进而导致渗漏水甚至出现流砂;在淤泥地层施工时打入桩施工和桩身止水性能都能得到保证,但可能发生较大桩身整体变形,同时应考虑内侧坑底加固以避免踢脚稳定性破坏。本文的研究对发展海岸带生态工程地质和沿海韧性水工建筑物具有工程指导价值。

       

      Abstract: The double-row steel sheet pile structure(DSSPS) is a soil-retaining and water-stopping composite structure. It composes of two rows of steel sheet piles, soil between the piles and tie rods. Compared with earth-rock dikes, it has a smaller footprint, faster construction speed, better integrity than steel sheet piles, and good dynamic stability against earthquakes and waves. It is widely used in water conservancy, water transportation, and coastal engineering. However, because DSSPS is greatly affected by geological conditions, its application effects and costs are not the same. This article focuses on collecting and investigating the use of double-row steel sheet piles in coastal projects at home and abroad. The effects of double-row steel sheet piles on karst-developed lithological foundations, high-permeability sand foundations and deep silt soft soil foundations have been investigated. Performance impact and design constraints are analyzed. Combined with the original geological conditions and design data, the finite element software is used to supplement the calculation and analysis. The application effects of the double-row steel sheet piles under various types of engineering geological and hydrological conditions are analyzed. The different projects of the double-row steel sheet piles in the coastal zone are summarized. It is found that the construction of double-row steel sheet piles in karst developed stratum needs to prevent leakage problems caused by poor verticality and karst connectivity caused by pile driving. In the sandy soil layer, it is necessary to prevent the inclination and deformation of the steel sheet piles from deteriorating the water-stop performance of the lock, which in turn leads to water leakage and even quicksand. During the construction of silt formations, the construction of the driven pile and the water-stopping performance of the pile body can be guaranteed, but a large overall deformation of the pile body may occur. At the same time, the inner pit bottom reinforcement should be considered to avoid the stability of the kicking foot. The findings of this article has engineering guidance value for the development of coastal ecological engineering geology and coastal resilient hydraulic structures.

       

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