Analysis of the subsidence caused by the shallow buried tunnel construction in subway of Zhengzhou
ZHANG Wenlong
Abstract：In order to study the characteristics of subsidence caused by the construction of shallow buried tunnel construction in subway of Zhengzhou,the 1st and 2nd entrance tunnels in new Zhengzhou university station of No.1 subway line are taken as examples.The construction process of shallow access tunnel construction by using CRD method are simulated with FLAC3D software.The simulated results are compared with the in-situ monitored data.The results show that for the same cross-sectional testing line,the maximum ground surface settlement with small pipe grouting construction can be reduced about 32.8％ compare with those without small pipe grouting construction.Small pipe grouting construction can reduce the ground surface subsidence significantly and is an effective auxiliary measure for CRD method.The ground surface subsidence are monitored and tested during the construction of shallow buried tunnel.All the tested value and ratio of subsidence meet with the requirements of the relevant regulations.Currently the linings of these two access passage tunnels are constructed.The value and the ratio of the subsidence all turn to be constant.CRD with small pipe grouting is proved be feasible for the shallow buried tunnel construction in Zhengzhou subway,which can provide references for the similar engineering.
Keywords：CRD methodsmall pipe groutingshallow buried excavationsurface settlements
Publication Date：2017-09-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 127-132 )