基于既有线平顺性浅埋暗挖隧道地面沉降控制标准

摘要

以西安地铁4号线下穿西安铁路站场咽喉区为例，从隧道施工引起的地层变位的一般规律出发，根据隧道施工地面沉降经典 Peck 法，基于既有线的平顺性，依据规范规定的既有线路的允许偏差值，应用数学力学的基本分析方法，分析了隧道施工对既有线路的影响及浅埋暗挖隧道施工对铁路站场的路线影响，系统地建立浅埋暗挖隧道施工地表沉降控制标准，为地铁隧道工程的资金投入和施工方案、加固方案的选取提供依据。%Taking Xi’an Underground Railway No .4 Line which crosses below Xi’an Station for example ,according to the general deformation regulation in tunnel construction and the classical Peak Method ,and based on the smoothness and the permissible deviation of existing lines ,the impacts of tunnel construction on existing lines and railway stations are an -alyzed ,and the control standard for the ground surface settlement in shallow-burying and under-excavating tunnel con-struction is estabilished by using basic mathematic and mechanical analysis methods ,which could provide some references for the fund investment of metro tunnel engineerings and the selecting of construction and reinforcement schemes .