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Help
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, withing 24 hours on weekdays.
Customer service
All questions about your order, return and delivery must be sent to our customer service team by e-mail at yourstore@yourdomain.com
Sale & Press
If you are interested in selling our products, need more information about our brand or wish to make a collaboration, please contact us at press@yourdomain.com
Construction of a tunnel is made by successive operations which must be good connected: striking down, mucking out, temporary supporting, final covering, finishing. The performance of a tunnel basically depends on the ground nature, underground condition, and overburden load. For economic reasons, transportation, communications and others purposes tunnel is boring with the largest section (fullface boring, boring with the shield, boring with the tunnel constraction such as TBM, NATM and Cut & Cover methods).The development in urban areas can be included the construction of shallow tunnels in soft or hard soils and rocks. The construction of tunnels in shallow depth causes the ground to displace. Monitoring in the before and after construction the project are used for controlling the stability of structures. In all methods of tunneling the maximum amount of the rock mass overburden loads are loaded and the distribution of forces are exit from the first condition, with having knowledge on the rock physical parameters can help to the tunnel designers.
⚠️ WARNING (California Proposition 65):
This product may contain chemicals known to the State of California to cause cancer,
birth defects, or other reproductive harm.
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⚠️ California Proposition 65 Warning: Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
