CAJ | 학술논문

门架式双排抗滑桩的计算模型大部分将桩排间岩土体视为弹性材料，而岩土体为弹塑性材料，使得抗滑桩内力、位移计算结果与实际情况相差较大。假设桩排间岩土体为弹塑性材料，提出一种弹塑性计算模型，该模型将桩排间岩土体看作线弹性单元和塑性单元的组合，根据结构力学知识、土的本构关系和数值分析方法建立一种计算前后排抗滑桩内力的计算方法。首先，由已知的桩顶位移，并结合结构力学位移法求出桩间土总应力。根据 Lade-Duncan 模型导出这两个单元的基本参数，然后，结合数值分析方法计算出抗滑桩的内力，最后，结合工程实例，运用 ANSYS 有限元软件进行计算分析，得出门架式双排抗滑桩的内力图。对比监测数据和弹性模型计算结果表明，弹塑性模型的计算结果比弹性模型更加接近监测值。
문가식쌍배항활장적계산모형대부분장장배간암토체시위탄성재료，이암토체위탄소성재료，사득항활장내력、위이계산결과여실제정황상차교대。가설장배간암토체위탄소성재료，제출일충탄소성계산모형，해모형장장배간암토체간작선탄성단원화소성단원적조합，근거결구역학지식、토적본구관계화수치분석방법건립일충계산전후배항활장내력적계산방법。수선，유이지적장정위이，병결합결구역학위이법구출장간토총응력。근거 Lade-Duncan 모형도출저량개단원적기본삼수，연후，결합수치분석방법계산출항활장적내력，최후，결합공정실례，운용 ANSYS 유한원연건진행계산분석，득출문가식쌍배항활장적내력도。대비감측수거화탄성모형계산결과표명，탄소성모형적계산결과비탄성모형경가접근감측치。
Now,the soil between the piles is usually considered to be elastic in many calculation models of portal double-row anti-slide piles. Because of the soil being the elastoplastic material, the results of elastic models are not consistent with the reality. A new plane link finite element model is established. The soil between the piles is considered to be the elastoplastic in this model which combined the linear elastic model and the plastic model. A calculation method for calculating internal force of the fore-pile and the rear-pile is developed, which is based on structural mechanics, soil constitutive relationship and numerical method. First, the soil total stress between the piles is acquired by calculation based on the displacement of pile top used in the displacement method. Then the internal force of portal double-row anti-slide piles is calculated by numerical method, linear elastic elements and plastic elements of this numerical method, whose basic parameters are derived according to the Lade-Duncan constitutive model. Last, combining with engineering example, the internal force of portal double-row anti-slide piles is calculated with the finite element program ANSYS. Compared with the monitoring data and the calculating results of elastic model, the calculating results of elastoplastic model are more consistent with the monitoring values.