The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Pipe roof advance support technology in the shallow tunnels construction has been used widely in preventing tunnel collapse, controlling surrounding rock deformation. Currently, the computational theory about pipe roof supporting effect is still not perfect; design procedures also did not make clear regulation. Based on Dawangding tunnel engineering, citing elastic foundation model, the stress characteristics...
Deep excavation engineering is a dynamic and complex system where the soil and the support structure interact. By analysis of information of monitoring and surveying, the distortion of the earth can be learned and the change direction can be forecasted. Deep excavation of East Diaoyutai Station on the 9th line of Beijing subway is taken as an example, workers inspected earth surface displacement around...
Close-vertical underpass existing subway is the hardest condition during civil subway construction. Taking Beijing Metro Line 10 vertical Underpass Metro line 1 as the project background, the paper focus on the interacting of the new building and existing tunnel during the whole construction process. Adopting Ansys and Flac-3d to build large-scale mathematical and physical artificial models, by the...
Relying on the background of large section soil tunnel engineering, the numerical simulation on three excavation methods for soil tunnel including bench method, arch heading method and cross diaphragm were carried out. Results show that the arch heading method is confirmed as optimum for this project by comparative analysis. And then, according to the monitoring results of the arch heading method,...
According to the failure characteristics of surrounding rock after excavation, the indexes, such as the influence degree of the shear, tension crack, compression failure, unloading, disturbance and so on, are proposed to evaluate the failure characteristics. These indexes can not only describe reasonably the different failure characteristics of surrounding rock mass of underground opening under excavation,...
Based on the methods of the others, used the stochastic medium theory, the expressions about main influence angle of stratum are proposed in this paper to validate its rationality especially in hard clay in some factual project. The results show that the expressions can reflect on the ground settlement caused by tunnel construction very well and afford a certain reference to the engineer.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.