In view of the hydraulic reclamation in deep open water during the construction of the filled artificial island, the traditional construction method of direct hydraulic reclamation has some engineering problems such as poor control accuracy and low planeness of hydraulic reclamation. In this paper, the experimental study on high-precision layered hydraulic reclamation in deep open water is carried out. The study shows that the layered hydraulic reclamation technology has high control accuracy and great planeness of hydraulic reclamation, which can reduce the average allowable deviation of layered hydraulic reclamation by about 14.7% based on the current specification in China.
The construction of the filled artificial island can effectively solve the contradictions between land supply and demand of some countries along the Belt and the Road, which has obvious economic and social benefits. With the promotion of the projects of the Belt and the Road, the construction of the filled artificial island is facing the challenges of new special conditions, such as large water depth in construction area and limited construction materials.
At present, the technical researches on the construction of filled artificial island at home and abroad mostly focus on the general layout, construction procedures, analysis of structure and soil properties, as well as the impact on the marine environment. For example, Wang, Yan, Liu, Tong, Yu and Liang (2013) focused on analyzing the effects of different layout schemes on the marine environment of the Dalian offshore reclaimed airport island. Yan and Su (2010) combined with the specific engineering case of a sight artificial island in Tianjin, focused on the feedback analysis method based on ABAQUS software to guide the construction procedure of artificial island on soft soil foundation. Bellendir, Finagenov and Glagovsky (2011) analyzed the structural stability of artificial island designed for developing the gas field. Based on the numerical analysis method, Kou, Liu and Hou (2013) analyzed the deformation characteristics such as settlement and displacement of steel cylinder during the construction of artificial island. Lai, Zheng, Li and Liu (2016) focused on the dynamic stability of artificial island triggered by self-weight, seepage and earthquake. Lloret, Hicks and Wong (2012) studied and analyzed the soil characteristics of filled artificial island by considering the heterogeneity of geotechnical materials. Wang, Wang, Yuan, Duan and Liu (2021) carried out the experimental study on liquefaction resistance of hydraulic fill coralline soils at artificial islands based on large-scale dynamic triaxial apparatus. In view of the hydraulic reclamation in deep open water during the construction of the filled artificial island, the traditional construction method of direct hydraulic reclamation has some engineering problems such as poor control accuracy and low planeness of hydraulic reclamation. However, the current research is still lack of relevant discussion to solve the problem of precision and planeness in hydraulic reclamation construction. Therefore, it is urgent to carry out further research on high-precision layered hydraulic reclamation technology.
