长江码头岸坡悬挂式拉森钢板桩支护方案优化设计研究

STUDY ON OPTIMIZATION DESIGN OF SUSPENDED LARSENS TEEL SHEET PILE SUPPORT SCHEME FOR BANK SLOPE OF YANGTZE RIVER WHARF

为了确保码头岸坡的稳定性,研究采用拉森钢板桩进行支护,并对其在岸坡支护中的作用进行分析。以蒙西至华中地区铁路煤运通道集疏运系统华容煤炭铁水联运储配基地工程码头一期工程为背景,采用正交设计法设计9种组合钢板桩支护设计参数,使用FLAC3D软件建立岸坡支护的数值计算模型,研究其对边坡稳定性的控制效果;利用量纲分析法推导安全系数与钢板桩设计参数之间的关系式。研究结果表明:码头岸坡变形最大的区域位于开挖斜坡的坡底处,最大位移量17 cm,岸坡的位移模式表现为深层滑移;开挖后的最大水平位移位于挖方边坡,最大值10.7 cm,滑移随深度增加逐渐减小;工程中所采用钢板桩方案的边坡稳定性安全系数为1.25,满足规范要求;运用量纲分析法推导了安全系数公式。

In order to ensure the stability of the wharf slope,this study adopts Larsen steel sheet piles for support and analyzes their role in slope reinforcement.The research is based on the Phase I project of the coal transportation hub and distribution base for the Mongolian-Western to Central China railway coal transportation channel,specifically the wharf construction.A total of 9 combinations of steel sheet pile support design parameters were designed using the orthogonal design method.The FLAC 3D software was used to establish a numerical calculation model for slope reinforcement and study its control effect on slope stability.The dimensional analysis method was utilized to derive the relationship equation between safety factor and steel sheet pile design parameters.The research results demonstrate that:the area with the maximum deformation in the wharf slope is located at the bottom of the excavation slope,with a maximum displacement of 17cm.The displacement pattern of the slope exhibits deep-seated sliding.The maximum horizontal displacement after excavation occurs in the cut slope,with a value of 10.7cm,and the sliding decreases gradually with increasing depth.The safety factor for slope stability in the steel sheet pile solution used in the project is 1.25,which meets the requirements of the specifications.The dimensional analysis method was employed to derive the formula for the safety factor.