Measurement and Analysis of the Variation Characteristics of Surrounding Rock Pressure During the Construction Process of Loess Tunnel Step Method
Taking a loess tunnel project in Gansu Province as the research object,the variation characteristics of surrounding rock pressure during the step method construction process were analyzed through actual measurement . Using intelligent pressure sensors,continuously collect rock pressure data for 7 days before and after the construction of the lower steps,inverted arches,and secondary lining of the tunnel;At the same time,data processing software was used to analyze the impact of various construction processes on the surrounding rock pressure of the tunnel .Analysis shows that the secondary lining construction of the tunnel has the greatest impact on the surrounding rock pressure of the tunnel,followed by the lower step construction,while the inverted arch construction has the smallest impact on the surrounding rock pressure;The construction of the lower steps of the tunnel has the greatest impact on the surrounding rock pressure at the arch waist of the tunnel;After the secondary lining construction of the tunnel,the surrounding rock pressure shows a trend of first decreasing and then increasing .
loess tunneltunnel surrounding rocksurrounding rock pressurestep method constructionsecondary lining
万方数据
维普
