衡重式板桩结构在码头中的应用  

Application of counterweight sheet-pile structure in wharf

作　　者：扈世龙 HU Shi-long(Guangxi Transportation Science and Technology Group Co.,Ltd.,Nanning 530007,China)

机构地区：[1]广西交科集团有限公司,广西南宁530007

出　　处：《水运工程》2022年第11期110-115,共6页Port & Waterway Engineering

摘　　要：分别建立无锚式、单锚式和衡重式板桩码头有限元概化模型,并以某10万吨级板桩码头为原型,进行数值分析。结果表明:衡重式板桩的最大水平位移值分别为无锚式板桩的1/13和单锚式板桩的1/2;无锚式板桩入土段土压力分布突变明显,单锚式板桩入土面以上墙后土压力分布突变明显,衡重式板桩墙后和墙前土压力分布均较平顺;无锚式和单锚式板桩弯矩、剪力分布均出现多次反转,尤以无锚式板桩最明显,衡重式板桩除在衡重台位置出现弯矩突变外,其他位置弯矩、剪力分布均较平顺;工程案例分析中衡重式板桩桩身水平位移和弯矩属于正常范围,同时衡重式结构不需设置锚碇系统、后排灌注桩等组合结构,具有场地适应性强、施工简单和建设成本低等诸多优势,在板桩码头中具有较强的应用价值。The generalized finite element models of anchorless, single-anchored, and counterweight sheet-pile wharves are built separately, and a 100,000-ton sheet-pile wharf is used as a prototype for numerical analysis. The results indicate that the maximum horizontal displacement of the counterweight sheet pile is 1/13 of the anchorless sheet pile and 1/2 of the single-anchored sheet pile. The soil pressure distribution of the anchorless sheet pile sees a sudden change in the soil entry section, and that of the single-anchored sheet pile encounters the same behind the wall above the soil surface, while that of the counterweight sheet pile is relatively smooth behind the wall and in front of the wall. For anchorless and single-anchored sheet piles, the distributions of bending moment and shear force are reversed many times, especially for the anchorless sheet pile, while in the case of the counterweight sheep pile, except for the sudden change in bending moment at the counterweight table, the distributions of bending moment and shear force in other positions are relatively smooth. In the case analysis of the project, the horizontal displacement and bending moment of the counterweight sheet pile are within the normal range. Moreover, the counterweight structure does not require the setup of the combined structure such as the anchor system and the rear cast-in-place pile, featuring many advantages such as strong site adaptability, simple construction, and low construction costs. It has strong application value in sheet-pile wharves.

关 键 词：水工结构 衡重式板桩 数值模拟 有限元 板桩码头 

分 类 号：U656.11[交通运输工程—港口、海岸及近海工程]