Abstract
With the continuous construction and development of Chinese infrastructure, more and higher requirements are imposed on the construction of expressway engineering. The construction of mountainous expressway has been gradually transformed from winding mountain to bridging and digging tunnels. Various forms of subgrade such as high filling and deep cutting, half filling and half cutting are unavoidable. The huge demand for roadbed filling and the inconvenience of transportation conditions have caused extreme costs for external materials. On the other hand, tunnel excavation brings a large amount of soft rock abandoned slag. If soft rock abandoned slag can be used for subgrade filling, it will not only help avoid resource waste, but also help reduce environmental damage. This paper introduces progress of researches at home and abroad on engineering properties, particle composition and distribution characteristics, CBR, compaction characteristics, etc. of soft rock, as well as the evaluation criteria and applicability of soft rock as subgrade filler in detail.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IOP Conference Series: Earth and Environmental Science
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
