Abstract:In response to the regulatory requirements of Shanghai regarding the treatment of engineering slurry, to alleviate the pressure on end-of-pipe disposal and promote the green development of transportation infrastructure, a scheme for on-site solidification of slurry in bored cast-in-place piles is proposed. By analyzing the principle and equipment composition of the in-situ solidification technology for soft soil, it is applied to the co-treatment of slurry for bored cast-in-place piles and ponds. Compared with the traditional replacement technology, the advantages of the technology in construction efficiency, cost control and environmental protection are identified. Laboratory tests are conducted to determine the optimal solidifying agent dosage. A complete process of cover construction preparation, technological operation and quality inspection is formulated. And the feasibility of the scheme is verified by an example of the treatment of ponds and creeks around a secondary highway waterway bridge in Chongming. The results show that the scheme can realize zero off-site transportation of engineering slurry, and the strength and settlement of the solidified soil meet the specification requirements, providing technical support for the green transformation and upgrading of highway construction.
