桩结构直立式海堤技术开发及其抗弯性能的研究.pdf

摘要摘要本文针对未来围海工程的特点,为在低滩深厚软基上筑堤,保证海堤的安全以及工期的要求,建筑高标准的海堤,桩结构直立式海堤,对其抗弯性能进行了研究,主要完成了如下工作: l、概述了海堤发展历史和研究现状、桩受水平荷载的计算理论和方法以及存在的一些问题,桩结构直立式新形海堤和研究其抗弯的重要意义。 2、桩结构直立式海堤技术,设计了新的海堤断面型式,并论述了这种新型海堤的优点。 3、联体桩为刚性桩,在自由工作状态,考虑桩的实际工作状态可能出现的绕顶转动、绕底转动和平移的位移形式,改进了自由支承法的计算方法,使计算更加符合实际。4、联体桩为弹性桩,考虑土的塑性交形,修正了赵明华的newmark法,并与试验数据比较,验证了其正确性,并用它分析桩土参数的变化对桩的位移和弯矩的影响。 5、在合田良实公式的基础上,提出适合本海堤波浪力的计算方法,对海堤受波浪力的大小与完全直壁的进行了比较,得到海堤所受波浪力比完全直壁的小的结论。 6、用有限元对海堤加土工格栅和锚碇结构的措旅进行模拟,分析了土工格栅和锚碇结构对海堤弯矩和水平位移的影响。关键词:PCC桩海堤水平荷载土压力复合地基反力法有限元土工格栅锚锭结构竺墅璺————一 Abstract Focusing on thecharacteristics ofdike engineering ofthefuture,to guarantee thesecurity of dike,meet thetimelimit for aproject,this paper is todevelop the ErectDike ofCast-in-situ Concrete Pileandconduct aresearch on itsmoment resistance inorder tobuild dike on soft soil anddeep water outthefollowing tasks: thehistory and present state ofdike,and putational theoriesand methods ofthe laterally loaded problems the importance of development oferect isdiscussed. erect dike ,making two kinds ofthedike,devising theconstruction methods andtechniques ofthedike,expounding itsmerits. thejoined PCC isused asrigidpile,and atthe stateoffreerotation,rotation about top, rotationabout base,translation are taken putational methods hasbeen improved. thejoined PCC isused Minghua’S newraark method haS been 、析tll the experimental data,the correctness of thenew method is new method isapplied toanalyze theinfluence oftheparameter ofpileand soil ondisplacement andmovement ofthepile, on theGoda Formular,putational methods of wave pressure,which is fitfor thedike,ale put contrastbetween thedikeand dikemade ofabsolute erect dikeiS iSthat Wave pressure ofthe dikeiSsinailerthan thatofabsolute erectdike. ofmeaSures ofadding geotextile andanchoring tothe dike ism