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Based on the comprehensive comparison and analysis of the methods for laying out and the application effect of the construction survey control network for the construction of the artificial islands and tunnels for the Hongkong-Zhuhai-Macao Bridge and the Shenzhen-Zhong shan Link, this paper summarizes the common characteristics of the construction survey for the cross-sea artificial islands and tunnels, and proposes reasonable suggestions on the design of the survey networks, site selection and embedment of survey points, evaluation of the stability of control points and application of survey results, which can be used for reference on similar projects. [ABSTRACT FROM AUTHOR]

The west artificial island of Shenzhen-Zhongshan Link adopts the rapid island-formation process by inserting large diameter steel cylinders into the enclosed island body on the sea bed. At present, the cases of rapid island-formation by steel cylinder are relatively few, and the research on the tilt of steel cylinder during construction and the stability of the cylinder need to be further deepened. Taking the west artificial island of Shenzhen-Zhongshan Link as an example, in view of the construction conditions of steel cylinder vibration and sinking until the formation of land area of artificial island, this paper analyzed the causes of the tilt of the cylinder under the comprehensive action of loads inside and outside the island, the results are closely related to the geological conditions and the lateral pressure and water pressure caused by the foundation reinforcement inside and outside the cylinder during construction. The monitoring results after foundation treatment in the island and the riprap of the island wall structure are basically completed show that the cylinder displacement and tilt have converged, and the security has been controlled. It provides some experience reference for further research on the stability of steel cylinder enclosure structure during construction in similar projects. [ABSTRACT FROM AUTHOR]

In order to realize data fusion calculation in the flexible elevation transference and meet the data monitoring requirements of leveling construction, a decision support system for leveling construction of Shenzhen -Zhongshan Link immersed tube storage area was developed. In this paper, measurement and control solution method for leveling construction was introduced, the structure of decision support system and the main function modules including general navigation & positioning, leveling parameter design and positioning, leveling construction monitoring and leveling data management were analyzed, and an application example in the leveling construction of immersed tube storage area was also given. Application results show that the technical route of the measurement and control method is reasonable, the calculation method of the software is efficient and correct, multi-perspective data display mode can vividly display the relative relationship between real time monitoring elevation and design elevation, which meets the application requirements of leveling construction. [ABSTRACT FROM AUTHOR]