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A very important factor in production safety accidents caused by engineering construction is that the approved plan has not been effectively implemented. Therefore, cracking the plan and implementing the two-skin is an important issue for engineering construction safety management to be solved urgently. This article takes the construction of the NanSha Bridge as a case, and for the more dangerous sub-projects, the premise is to ensure the construction period, quality, safety and environmental protection goals, and meet the basic requirements of norms, safety, environmental protection, and soil and water conservation. The risk should be systematically assessed, and targeted avoidance and preventive measures should be formulated, and the definition and characteristics of the special control process acceptance management method and the control points and processes in the implementation process should be studied. Using special control process management, the NanSha Bridge adopts special control process acceptance management procedures for dangerous sub-projects, which solves the problem of process acceptance or safety inspection and acceptance. In the past, only the quality inspection department or safety department personnel participated. The shortcomings of inspection or acceptance require that the main control focus of each special control process inspection is consistent with the actual project. Through the special control process acceptance work, the hidden dangers can be found in advance and rectified and eliminated in time before the next step of construction. The hidden dangers are truly eliminated in the bud and the consistency between the approved plan and the actual implementation can be effectively guaranteed. Through special control process management, the dangerous sub-item project plan is truly implemented, avoiding the phenomenon of two skins in the approval plan and implementation, which has high reference significance for similar projects.

With the continuous improvement of bridge construction technology in our country, although the service life of the bridge has been greatly extended, the mechanical connection technology of steel bar in the technology is still in the stage of steel bar straight thread connection, which is nearly 30 years behind that of foreign countries. According to the development status and application requirements of bridge construction in China, it is of great practical significance to explore new technologies and methods to solve the problem of insufficient strength of straight thread connection of reinforcement. In this paper, the reliability of the straight thread reinforcement connection in the bridge foundation reinforcement cage connection technology is studied as the main breakthrough point, and the main problems encountered in the application of the straight thread reinforcement connection technology in the bridge reinforcement cage connection are analyzed.