Taking the crossover tunnel in the Baishiqiao-Xueyuannanlu metro section tunnel of Beijing metro No 4 as the engineering background, the control method for ground subsidence is introduced.
以北京地铁4号线白石桥至学院南路区间渡线隧道作为工程背景，阐述在复杂环境下浅埋大跨隧道施工的地层沉降控制方法。
Setting section crossover in high-speed railway is subject to many factors.
高速铁路区间渡线的设置受诸多因素的影响。
The passive crossover network features a thermal protection system on the HF section providing audibly transparent protection for the compression driver.
被动分频网络功能，对热防护系统高频部分提供出声透明的压缩驱动程序的保护。
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