Research progress on soft soil foundation treatment techniques of highway under the background of dual-carbon strategy

Abstract

[Objective] With the large-scale development of China's infrastructure construction, the scale and depth of highway soft soil foundation treatment have been greatly improved in recent years, and new theories, new technologies, new materials and new processes of highway soft soil foundation treatment haveemerged constantly and been popularized and applied in engineering practice. In order to avoid blind selection of highway soft soil foundation treatment technologies, and make mature, reliable, cost-effective technical achievements more widely promoted and applied, it is necessary to timely update and summarize the current research progress of highway soft soil foundation treatment technology.[Methods] On the basis of combing the development period of highway soft soil foundation treatment technology in China, a variety of characteristic and representative new technologies developed in highway soft soil foundation treatment in recent years are classified from four aspects: drainage consolidation method, composite foundation method, replacement method and curing agent stabilization method, and some theoretical achievements and standardization of highway soft soil foundation treatment technology are summarized. At the same time, the shortcomings and future development trend of highway soft soil foundation treatment technology are put forward.[Results] The research shows that based on China's national conditions and the needs of social and economic construction, the development period of highway soft soil foundation treatment technology is reasonably divided into four stages(initial exploration stage → vigorous development stage → diversified innovation development stage → green and low-carbon development stage). Although the overall level of China's highway soft soil foundation treatment technology has been greatly improved, but with the scale and depth of China's soft soil foundation treatment has been greatly improved, it is still facing more and more challenges, such as the limited development of construction machinery, the technical construction and monitoring is not intelligent enough, the service toughness needs to be improved, the safety, environmental protection and economy are not enough.[Conclusion] combined with the national requirements for intelligent construction and environmental protection and energy saving, China's highway soft soil foundation treatment technology will continue to develop in the direction of multi-method combined technology, intelligent construction, intelligent operation and maintenance technology, high value utilization technology of green and low-carbon, standardized technology system in the future. The research result will point out the direction and provide reference for the treatment technology of highway soft soil foundation in China at present.

Keywords

highway / soft soil foundation treatment / new technology / development period / standardization construction / development trend / influencing factors / deformation