过河隧道最小安全埋置深度的探讨

Cross River Tunnel Buried Depth of Minimum Safety

过河隧道埋置深度受河道清淤疏浚、水流冲刷、管身的抗浮能力等多因素的影响,也是隧道工程安全和控制投资的主要因素。结合某电力电缆隧道穿越永定新河工程,采用刚体平衡法、应变趋势法确定埋置深度,与规范提供的方法进行比较,分别减少1.61%、4.01%,减少幅度均在计算误差范围内。

Buried depth of tunnel across the river influenced by river dredging, water erosion, tube body of the float resisting ability and other factors, it is the main factor to tunnel engineering safety and control investment. Based on a power cable tunnel in Yongding New River project, using the rigid equilibrium method, strain trend method to determine the buried depth, and specification method were compared, respectively decreasing 1.61%, 4.01%, reduced amplitudes are in the error range.