CAJ | 학술논문

对处于粉细砂地层中的广深港高铁狮子洋隧道内高速列车引起的地面振动进行现场测量，列车速度310 km/h时，隧顶最大振动加速度为10.78 cm/s2，最大振动速度为0.034 cm/s；振动能量均主要集中在60 Hz以内，主频分布于30～40 Hz范围内，振动主频整体上随距离的增加而降低；加速度在30～40 m范围存在明显的放大区。通过类比分析可知轨道系统采用减振垫层后场地振动较小，与低速地铁所致环境振动在同一量级，总体上低于不采取特殊措施的地铁，而略高于采取钢弹簧浮置板轨道的地铁。发现环向、径向振动大于垂向振动的现象，而通常只关注竖直向振动，因此建议注意水平向地面振动对地面目标的影响规律。本文形成了多种条件下高铁经过隧道所致环境响应数据中心，可进行地面响应的多维插值预测；发现用极值 I 型公式可更好地描述场地振动分布规律，据此可完成更多情况的振动评估。
대처우분세사지층중적엄심항고철사자양수도내고속열차인기적지면진동진행현장측량，열차속도310 km/h시，수정최대진동가속도위10.78 cm/s2，최대진동속도위0.034 cm/s；진동능량균주요집중재60 Hz이내，주빈분포우30～40 Hz범위내，진동주빈정체상수거리적증가이강저；가속도재30～40 m범위존재명현적방대구。통과류비분석가지궤도계통채용감진점층후장지진동교소，여저속지철소치배경진동재동일량급，총체상저우불채취특수조시적지철，이략고우채취강탄황부치판궤도적지철。발현배향、경향진동대우수향진동적현상，이통상지관주수직향진동，인차건의주의수평향지면진동대지면목표적영향규률。본문형성료다충조건하고철경과수도소치배경향응수거중심，가진행지면향응적다유삽치예측；발현용겁치 I 형공식가경호지묘술장지진동분포규률，거차가완성경다정황적진동평고。
Ground vibration induced by high-speed train in Shiziyang tunnel which lies in fine sand layer stratum is measured. At the speed of 310 km/h,the maximum acceleration on top of the tunnel is 10.78 cm/s2,while the maximum velocity is 0.034 cm/s;vibration energy is mainly concentrated within 60 Hz,main frequencies are in 30-40 Hz , and the predominant frequency decreases with distance. There is obvious amplification for acceleration in the range of 30-40 m. Analogy analysis shows that by using damping cushion in the track system the environmental vibration is small,and is in the same order of magnitude as low speed subway,lower than that of subway without dumping measures,while slightly higher than that of subway with steel spring floating slab track. In some points,the circumferential and radial vibrations are larger than the vertical vibration,so it is suggested that attention should also be paid to the influence of horizontal ground vibration on buildings beside that induced by vertical vibration. A data center of environmental response induced by underground highs-peed trains is formed,based on it prediction for ground vibration by multi-dimensional interpolation can be executed. A empirical formula of extreme value type is also put forward to describe the ground vibration distribution,by which more vibration evaluation can be accomplished conveniently.