CAJ | 학술논문

本文对沪宁城际高速铁路列车运行引起的周围环境振动特性和振动传播规律，以及振动对京沪铁路地基沉降的影响进行研究。通过建立数值模型，分析桩网结构地基加固方式和土质条件对振动的影响，并对振动引起的京沪铁路地基土体累积变形进行了预测。结果表明：采用桩网结构进行地基加固后，地面振动减弱，且距离地基加固区越近，减振效果越明显，距线路中心线10 m处地面振动加速度峰值下降约33.8％；土质条件对振动传播有较明显的影响，软土条件下，振动衰减较快，近场地面处的振动较大，应重点关注振动对行车安全的影响；较硬土质条件下，振动衰减较慢，应重点关注振动对周围环境的影响；当地基表层和底层土体硬度较大，且中间夹有软土层时，振动衰减速度缓慢，应注意振动的影响范围。两线路基坡脚间距为20 m时，在沪宁城际铁路当前轨道平顺性和平顺性恶化条件下，列车运行导致京沪铁路地基土体累积变形量分别增加3.44％和7.07％；坡脚间距为5 m时，列车运行导致京沪铁路地基土体累积变形量增加18.36％，这反映出轨道平顺性和线间距（沪宁城际与京沪铁路间距离）对列车荷载循环作用下的地基土体累积变形影响较小。
본문대호저성제고속철로열차운행인기적주위배경진동특성화진동전파규률，이급진동대경호철로지기침강적영향진행연구。통과건립수치모형，분석장망결구지기가고방식화토질조건대진동적영향，병대진동인기적경호철로지기토체루적변형진행료예측。결과표명：채용장망결구진행지기가고후，지면진동감약，차거리지기가고구월근，감진효과월명현，거선로중심선10 m처지면진동가속도봉치하강약33.8％；토질조건대진동전파유교명현적영향，연토조건하，진동쇠감교쾌，근장지면처적진동교대，응중점관주진동대행차안전적영향；교경토질조건하，진동쇠감교만，응중점관주진동대주위배경적영향；당지기표층화저층토체경도교대，차중간협유연토층시，진동쇠감속도완만，응주의진동적영향범위。량선로기파각간거위20 m시，재호저성제철로당전궤도평순성화평순성악화조건하，열차운행도치경호철로지기토체루적변형량분별증가3.44％화7.07％；파각간거위5 m시，열차운행도치경호철로지기토체루적변형량증가18.36％，저반영출궤도평순성화선간거（호저성제여경호철로간거리）대열차하재순배작용하적지기토체루적변형영향교소。
T he characteristics of the surrounding soil vibration induced by trains running on the Shanghai‐Nan‐jing intercity high‐speed railway(SNHSR) ,the ground vibration attenuation law and the vibration impact on the foundation settlement of Beijing‐Shanghai railway(BSR) ,are studied in this paper .Through the establishment of the numerical analysis model ,the influence of pile‐geogrid structure composite foundation and soil conditions on the ground vibration is analyzed ,and the cumulative deformation of BSR foundation soil is predicted .The conclusions are as follows :the composite foundation of pile‐geogrid structure can reduce the ground vibration , and the closer to the foundation reinforcement area the more obvious the vibration damping effects are .Ten me‐ters away from the center line of railway ,the ground vibration acceleration peak value declines about 33.8% . The influence of foundation soil characteristics on vibration attenuation is obvious .As the vibration attenuation is fast and the near field ground vibration is intense under soft soil condition ,the influence of vibration on oper‐ating safety of train should be addressed .While under hard soil condition ,the vibration attenuation is slow ,the impact of vibration on ambient environment should be focused on .The vibration attenuation is extremely slow <br> when the surface and underlying soil of the foundation is hard and when there are soft soil layers sandwiched in‐between ,therefore ,attention should be paid to the vibration influence scope under this condition .When the dis‐tance between the slope toes of BSR and SNHSR is 20 m ,cumulative plastic deformation of BSR foundation soil ,induced by the operating vibration of SNHSR ,increases about 3.44% and 7.07% respectively under the current track irregularity and deteriorating track irregularity condition of SNHSR .However ,when the distance between the slope toes of the two railway lines is 5 m ,cumulative plastic deformation of BSR foundation soil in‐duced by the operating vibration of SNHSR increases about 18.36% under the current track irregularity condi‐tion ,which indicates little influence imposed by the track regularity and the distance between the railway lines on the cumulative plastic deformation of foundation soil under the action of cyclic train loads .