CAJ | 학술논문

作为一种板桩结构，主桩套板结构的计算理论和设计方法仍未明确。文章结合案例提出简化计算方法，推导主桩、套板入土深度与桩板宽度比的关系式，分别采用传统m法和考虑锚碇点位移的m法计算主桩内力，并与有限元结果对比。基于ABAQUS软件建立三维桩土模型，研究不同工况下结构的力学性能，分析主桩入土深度和刚度对套板内力的影响。结果表明，主桩套板结构的锚碇点位移不可忽略，且套板宽度越小、入土越深，主桩所需的入土深度越小；主桩入土深度对结构的整体稳定有影响，随主桩入土加深套板内力逐渐趋于稳定；主桩刚度的增大能够减小套板的受力，为节省材料套板可适当减薄。
작위일충판장결구，주장투판결구적계산이론화설계방법잉미명학。문장결합안례제출간화계산방법，추도주장、투판입토심도여장판관도비적관계식，분별채용전통m법화고필묘정점위이적m법계산주장내력，병여유한원결과대비。기우ABAQUS연건건립삼유장토모형，연구불동공황하결구적역학성능，분석주장입토심도화강도대투판내력적영향。결과표명，주장투판결구적묘정점위이불가홀략，차투판관도월소、입토월심，주장소수적입토심도월소；주장입토심도대결구적정체은정유영향，수주장입토가심투판내력축점추우은정；주장강도적증대능구감소투판적수력，위절성재료투판가괄당감박。
Main pile with inlaid sheet structure is a kind of sheet?pile structure, whose calculation theory and design method remains unclear. Combined with a project case, a simplified calculation method was put forward in the paper, and relationship among main pile embedded depth, inlaid sheet embedded depth as well as width ratio between pile and sheet was formulated. Meanwhile, conventional m method and m method considering anchored point displacement were both utilized to calculate internal force of main pile, whose results were compared with those of finite element method. Based on ABAQUS, a 3D pile?soil model was built to study mechanical properties of the structure under different working conditions, and analysis was made about impacts of main pile embedded depth and rigidity on internal force of inlaid sheet. It is revealed that the anchored point displacement shouldn′t be ig?nored, and main pile embedded depth will reduce when inlaid sheet gets narrower and deeper. Main pile embedded depth has influence on the overall stability of structure, and internal force of inlaid sheet tends to be stable with the increase of main pile depth. Besides, increasing main pile rigidity helps reduce the stress of inlaid sheet. In order to save material, inlaid sheet could be made thinner appropriately.