Analysis and Countermeasures of Initial Support Deformation and Limit Invasion in Expressway Tunnel
Taking a tunnel as the research object,the deformation measurement of the initial support of the tunnel is specially set forth,and the causes of deformation limit invasion are analyzed.Aiming at the primary design risk of tunnel,the middle level analysis and evaluation of influencing factors are carried out.And based on the further argument and analysis,the solutions are formulated to control the development of the deformation.The analysis results show that the slow dip horizontal shale and continuous rainfall are the major factors affecting the initial support deformation,and the improper construction and untimely monitoring and measurement and early warning directly accelerate the development of deformation.Finally,the initial support invasion limit is caused.Therefore,aiming at the characteristics and causes of tunnel deformation and invasion,the emergency treatment measures such as temporary support and double-liquid grouting are formulated,and the replacement arch renovation scheme of secondary lining is followed closely.The better experience and reference are provided for the other similar projects.
highway tunnelinitial support deformationlimit invasiondisposal scheme
NETL
NSTL
万方数据
