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Study on Rigid and Flexible Compound Disaster Reduction Technology for the Tunnel with High Rock Temperature in Meizoseismal Area
(1 School of Civil Engineering, North China University of Technology, Beijing 100144; 2 Key Laboratory of Transportation Tunnel Engineering of the Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031; 3 China Railway Fifth Survey and Design Institute Group Co., Ltd., Beijing 102600)
Abstract In order to improve seismic safety of the tunnel with high rock temperature in meizoseismal area, this paper studied the rigid and flexible compound disaster reduction technology by finite difference software based on a research of Jiwoxiga tunnel on the Lasa-Rikase railway. And the results show that the damping effect and thermal insulation effect of tunnel structure are 40.91% and 1.4% respectively if only shock absorption layer is laid; the antiseismic effect and heat resistance effect of tunnel structure are 46.39% and 1.9% respectively if only interval injection of surrounding rock is taken and the pressure of surrounding rocks on secondary lining structure is reduced; the anti-seismic and damping effect, heat resistance or isolation effect of tunnel structure are 63.38% and 2.7% respectively if full-ring interval injection of surrounding rock is conducted and shock absorption layer is laid. The disaster reduction effect of the rigid and flexible compound technology is the best.
Abstract：
In order to improve seismic safety of the tunnel with high rock temperature in meizoseismal area, this paper studied the rigid and flexible compound disaster reduction technology by finite difference software based on a research of Jiwoxiga tunnel on the Lasa-Rikase railway. And the results show that the damping effect and thermal insulation effect of tunnel structure are 40.91% and 1.4% respectively if only shock absorption layer is laid; the antiseismic effect and heat resistance effect of tunnel structure are 46.39% and 1.9% respectively if only interval injection of surrounding rock is taken and the pressure of surrounding rocks on secondary lining structure is reduced; the anti-seismic and damping effect, heat resistance or isolation effect of tunnel structure are 63.38% and 2.7% respectively if full-ring interval injection of surrounding rock is conducted and shock absorption layer is laid. The disaster reduction effect of the rigid and flexible compound technology is the best.
.Study on Rigid and Flexible Compound Disaster Reduction Technology for the Tunnel with High Rock Temperature in Meizoseismal Area[J] MODERN TUNNELLING TECHNOLOGY, 2019,V56(5): 98-103
2019, Vol. 56 