铁道科学与工程学报2025，Vol.22Issue(1)：443-455,13.DOI:10.19713/j.cnki.43-1423/u.T20240532
考虑多层施工缝界面效应的富水高铁隧道底鼓变形机制
Floor heave deformation mechanism of water-rich high-speed railway tunnel considering multi-layered construction joint interface effect
摘要
Abstract
Current research on the water-rich high-speed railway tunnel's floor heave disease has not considered the interface effect of construction joints'due to layered concrete pouring.To adress this research gap,a refined three-dimensional numerical model was conducted based on an existing high-speed railway tunnel hydraulic disease case to study the mechanism of tunnel floor heave disease.The cohesive zone model was introduced to simulate the interface mechanical effect of construction joints.By analyzing the distribution of the stress field,the deformation pattern,and the development process of construction joint interface damage,the formation mechanisms of tunnel floor heave,and the delamination of tunnel bottom structure joints were revealed.Then,a parametric analysis of the invert arch construction type and various methods of interface measurement was carried out.The research findings indicate that,compared with the conventional model without considering the interface effect of tunnel floor construction joints,the floor heave value due to external water pressure increases significantly by about 31%when the interfacial effect of construction joints is considered.Hydraulic uplift will cause damage to the construction joints,with interface cracking distributed mainly throughout the invert arch-arch fill interface and near the foot side of the arch fill-leveling layer interface.Damage also occurs at the arch foot side of the track slab-leveling layer interface.Although the extent of the track slab-leveling layer interface damage is small,there is a risk of further extension of this initial damage under the cyclic load of the train.The invert arch-arch fill interface is the main factor affecting the floor heave deformation,and the bonding strength of the construction joints can be enhanced by chiseling the interface and applying an adhesion agent,which can effectively improve the resistance to hydrostatic deformation of the tunnel floor structure.For the water-rich and deep-buried high-speed railway tunnels,it is suggested that the construction stage should pay attention to the strengthening treatment of the construction joint,and the invert arch-arch-fill integrated structure can be adopted if necessary.Meanwhile,attention should be focused on detecting and filling separations at relevant locations during tunnel disease remediation.关键词
高铁隧道/高水压/底鼓变形/界面开裂/内聚力模型Key words
high-speed railway tunnel/high hydraulic pressure/floor heave deformation/interfacial cracking/cohesive zone model分类
交通工程引用本文复制引用
陈鑫磊,余楚海,张学民,武朝光,张永兴..考虑多层施工缝界面效应的富水高铁隧道底鼓变形机制[J].铁道科学与工程学报,2025,22(1):443-455,13.基金项目
国家自然科学基金高铁联合基金资助项目(U1934211) （U1934211）
南京滨诚整治开发计划项目(PPP202202) （PPP202202）
