Construction project is a complex project, and its own characteristics determine that it has multiple risks. Therefore, we must attach importance to risk management in construction project management. Based on my own work and study experience, the author briefly introduces the connotation of risk management and the main risk factors in construction projects, and puts forward some measures for risk management of construction projects for reference. Key words: main factors of risk management measures 0 Introduction With the continuous improvement of people's living standards, people's requirements for the quality of construction projects and risk management are gradually improving. Due to the characteristics of large investment and long construction period, the construction project itself has many uncertainties, so it may be a high-risk project. Therefore, strengthening the risk management of construction projects is not only conducive to ensuring the quality of construction projects and ensuring the smooth and real-time completion of projects, but also an inevitable measure to improve the efficiency of enterprises and adapt to the requirements of the current construction market. 1 The connotation of risk management Risk management is based on the identification, evaluation and analysis of risks, using scientific management techniques and means to prevent and deal with possible risks in engineering projects, controlling risks as much as possible, turning them into favorable conditions, and taking active remedial measures in time after risks occur. For construction projects, the process of risk management is as follows: ① Predict and identify risks. Through information collection, the possible risks are analyzed, and the possibility is consulted by experts and experimental demonstration is sought, and the possible risks are recorded. ② Analyze and evaluate possible risks. Analyze the possibility and harmfulness of risks, evaluate their potential impact on the project, and list the risks according to their harmfulness. (3) According to the listed risk list, take different countermeasures for risks with different hazard degrees. The purpose of project risk management is to identify the risks that may be involved in the project in advance and formulate corresponding countermeasures, so as to reduce the impact of risks at the minimum cost, and then successfully realize the construction objectives of the construction project. 2 Main risk factors of construction project The whole process of construction project from project initiation to completion is carried out under pre-planned conditions, but in the actual operation process, any condition in the project may change. These uncertain but potential factors are risk factors. The main risk factors encountered in construction projects are: 2. 1 social and environmental risks, including social risks and environmental risks. Common social risks include changes in policies, laws and regulations and the development of new technologies and new processes, while environmental risks refer to natural forces, such as floods, earthquakes, typhoons, hydrology, meteorology and geology. 2.2 Schedule risk Schedule risk refers to the comprehensive influence of various factors in the construction process of a construction project, which eventually leads to the delay of the project construction and cannot be completed in time according to the construction schedule. The risk factors that may affect the construction progress during the construction of a construction project are as follows: ① Technical risk, because the professional quality of designers is not too hard, the designed architectural drawings can not meet the construction requirements, and finally the design drawings need to be revised. In addition, because some construction enterprises have not completed the design drawings, they can only adopt the method of designing while constructing, which ultimately affects the construction progress; (2) Planning risks, the core of a construction project is the goal, and project planning must be based on this goal. Only the scheme that meets the requirements of the overall goal is a reasonable and reliable scheme. Unreasonable plans and plans that don't consider the emergencies in the project will cause economic losses of the project and form planning risks, which will further affect the progress of the project and generate schedule risks. 2.3 Cost Risk The main factors that cause the cost risk of a construction project are: ① Design changes. During the construction project, due to the requirements of the owner or other reasons, design changes often occur. At this time, it will cause the change of engineering quantity, increase the cost of construction projects and form cost risks; (2) Economic factors, the risks brought by the increase of expenses caused by economic emergencies, such as inflation, exchange rate changes, local protectionism, etc. (3) The cost budget is wrong, which may lead to the cost risk of the project due to the negligence of the budget staff or the incomplete collection of historical data and information of the project.

Original text from:/Gong Xue/Gongcheng Architecture/2010-07-18/1396.html.