CAJ | 학술논문

为研究城市轨道交通地铁线路减振型无砟轨道的使用对CA砂浆力学性能的要求，基于有限元理论，建立减振型单元板式无砟轨道的梁－体模型。一方面，研究减振垫的刚度对CA砂浆的变形和受力影响；另一方面，研究CA砂浆自身的弹性模量对其本身变形和受力的影响。研究结果表明：由于减振垫自身刚度较小的缘故，导致CA砂浆承受较大拉应力而存在受拉破坏的危险，随减振垫刚度的减小，CA砂浆和上部结构均会出现较大变形，进而影响轨道平顺性和行车安全；随CA砂浆自身弹性模量的增大，CA砂浆层所受拉应力随之增大，因此在配制高弹性模量的CA砂浆材料的同时必须保证其抗拉强度能够满足CA砂浆抗拉的要求。
위연구성시궤도교통지철선로감진형무사궤도적사용대CA사장역학성능적요구，기우유한원이론，건립감진형단원판식무사궤도적량－체모형。일방면，연구감진점적강도대CA사장적변형화수력영향；령일방면，연구CA사장자신적탄성모량대기본신변형화수력적영향。연구결과표명：유우감진점자신강도교소적연고，도치CA사장승수교대랍응력이존재수랍파배적위험，수감진점강도적감소，CA사장화상부결구균회출현교대변형，진이영향궤도평순성화행차안전；수CA사장자신탄성모량적증대，CA사장층소수랍응력수지증대，인차재배제고탄성모량적CA사장재료적동시필수보증기항랍강도능구만족CA사장항랍적요구。
In order to study requests of slab ballastless track with vibration pad and other vibration reducing measures in the urban rail transit subway lines for mechanical properties of CA mortar,the beam -body model in unit slab track was established based on the finite element principle.This paper aims to analyze the influence of stiffness of vibration pad on deformation and force of CA mortar,and study the influence of CA mortar’s own elasticity modulus on its own deformation and force.The results demonstrate that,due to little magnitude of vi-bration pad's stiffness,it results in the risk of brittle fracture of CA mortar with greater tensile stress,and with the decrease of vibration pad's stiffness,CA mortar and upper structure tend to have larger deformation,thereby af-fecting track smoothness and road safety.With the increasing value of elasticity modulus of CA mortar,the rele-vant tensile stress increases;therefore,when the CA mortar materials are made up with high elasticity modulus, the maximum tensile strength should meet the requirements of CA mortar tensile resistance.