Review of soft rock weathered material for subgrade filling

作     者：Wang De-yong Hu Jun-long Wang Jing Gao Shang-hui 

作者机构：CCCC Fourth Harbor Engineering Institute Co.Ltd. Guangzhou 510230 China Key Laboratory of Environmental Protection & Safety of Communication Foundation Engineering CCCC Guangzhou 510230 China Southern Marine Science and Engineering Guangdong Laboratory Zhuhai 519082 China The Sixth Engineering Company of CCCC fourth Harbor Engineering Co.Ltd. Zhuhai51900 

出 版 物：《IOP Conference Series: Earth and Environmental Science》 

年 卷 期：2021年第638卷第1期

摘      要：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.