Effect Of Underground Pipe Construction On Existing Tunnel Stability

The construction of reconstruction project or other projects near the existing Tunnel will cause different levels of impact on the stability of the adjoining Rock of the tunnel. Since highway tunnel at the large investment in the construction, When operating in the importance of reasons, the related projects of the existing Tunnel's construction, impacting the stability of the adjoining rock must be given sufficient attention.In pre-construction must be based on science, reasonable and accurate analysis, the identification of viable construction plan, and after the end of the construction, the construction of the project to make the necessary quality testing to ensure the stability of the tunnel rock.In this paper, Dalian Huangnichuan inverted arch of the tunnel laying of water mains issues on the ground floor of the culvert construction on Active- duty stability of the tunnel. Useing physical modeling,numerical simulation as Research methods combined to determine the optimal depth of the depth of water mains and the construction after the detection and verification. Physical model of experimental methods the different typical depth (4 models) excavation at the inverted arch of the tunnel impacting the stability of the tune. Based on the experimental model, use a numerical simulation of ANSYS to simulate all kinds of construction of the project, as a model experimental verification and added, that the two comparative analysis of the results, raised a reasonable construction of the proposed based on the two comparative analysis of the results. After the end of the construction, use Three scientific detection method to validate the project construction quality, and determine the stability of the tunnel. Physical model experiments under similar theory to determine the model of similar material, similar ratio, and the destruction of experimental model loaded, Deformation of the tunnel to do a qualitative analysis.Numerical simulation using ANSYS to simulate all kinds of construction of the project, through the finite element analysis, mainly from the displacement and stress two aspects of the tunnel deformation. The results show that. The results show that the inverted arch of the tunnel project,the depth of three meters of the tunnel slotted the stress distribution have significant effect, different depths of the excavation of the tunnel does not affect the entire structure of the same, The results of the project to provide a smooth construction of a reference. After the construction of the project, using ground-penetrating radar, the ground floor of the culvert and road construction were reasonable quality testing to determine the depth of water pipes slotted the excavation, Huangnichuan tunnel to provide safe and stable operation of the theory of reference.