CAJ | 학술논문

当高速列车通过时,将导致隧道出现振动现象.在此条件下,修建于富水黄土地基上的隧道能否满足振动安全要求,是困扰郑州至西安客运专线建设的难题之一,国内外没有任何经验可借鉴.为解决该问题,开展了模拟高速列车振动效应的激振试验,得出了不同激振频率下的振动速度在隧道仰拱结构深度方向、仰拱填充面横向和纵向的变化规律,也得出了隧底富水黄土中振动速度的变化规律.试验结果表明,隧道结构和隧底黄土中的振动速度均不大.综合分析后可以判定,列车引起的振动不足以对隧道产生明显影响,富水黄土隧道满足客运专线运营要求.
당고속열차통과시,장도치수도출현진동현상.재차조건하,수건우부수황토지기상적수도능부만족진동안전요구,시곤우정주지서안객운전선건설적난제지일,국내외몰유임하경험가차감.위해결해문제,개전료모의고속열차진동효응적격진시험,득출료불동격진빈솔하적진동속도재수도앙공결구심도방향、앙공전충면횡향화종향적변화규률,야득출료수저부수황토중진동속도적변화규률.시험결과표명,수도결구화수저황토중적진동속도균불대.종합분석후가이판정,열차인기적진동불족이대수도산생명현영향,부수황토수도만족객운전선운영요구.
When a high-speed train passes a tunnel, it will result in vibration. Under such conditions, if a tunnel built on water-rich loess can meet the vibration safety requirements is one of challenges during construction of Zhengzhou-to-Xi'an passenger dedicated line, because there is no experience that can be learnt from at home and abroad. To deal with this problem, an experimental study was performed by conducting forced excitation tests simulating the effect of high-speed train. Based on the results of the tests, the variations of the vibration velocity with different excitation frequencies were obtained in the direction of the tunnel upward arch liner structure and in both the horizontal and vertical directions of the upward arch liner filled cross-section. Furthermore, the variations of the vibration velocity within the water-rich loess were also obtained from the tests. The test results showed that vibration velocities at both the tunnel structure and the loess are not large. After a comprehensive analysis, it could be concluded that the train-induced vibration is not enough to have a significant effect on the tunnel and the water-rich loess tunnel can meet the operational requirements of the passenger dedicated line.