The effectiveness and the safety of road construction depend on many factors that pose the greatest risk to system safety. The aim of this study is to conduct a comprehensive assessment for these risk factors to contribute to the safety performance of road construction. To achieve this goal, this study constructs a hierarchical safety assessment framework comprising comprehensive risk indicators according to rich work experience and a relevant literature review and then proposes a group AHP-PCA (group analytic hierarchy process-principal component analysis) to calculate the weights of relevant risk factors. The important rankings of a case study using GAHP-PCA show that professional skill, safety education, and work attitude are the most important factors, which are consistent with the experience and knowledge of road construction safety management. The results also demonstrate that judgment dispersion naturally existing in classical AHP can be effectively reduced when combined with PCA, which is the innovation point of the method given in this article.

With the continuous development of social industry and economy, environmental problems are increasingly prominent. The disposal of oily wastewater needs to be addressed. As a physical separation method, gravity separation of oil and water has the advantages of low price, economic benefit, convenient maintenance and recyclable oil. This paper introduces the principle of gravity oil and water separation technology, expounds the research progress of gravity oil and water separation technology and equipment, and finally, puts forward the problems existing in the future development and puts forward some suggestions.

With the continuous development of social industry and economy, environmental problems are increasingly prominent. The problem of VOCs emission treatment needs to be solved. This paper introduces the source and harm of oil vapor produced in oil depot, and expounds the treatment measures of VOCs. The treatment measures of storage tank are introduced. The principle and research progress of four kinds of recovery processes are described. The development mode and research direction of VOCs treatment in oil depots in the future are prospected, the importance of oil vapor recovery is pointed out, and the recovery technology of VOCs should be developed in the direction of intelligence, integration, miniaturization and energy saving.

Petroleum is the lifeline of the national economy and an important strategic resource for the survival and development of the country. Nowadays, the main way of storage of raw materials and products in the petroleum and petrochemical industry is tank storage, so the operation, maintenance and anti-corrosion of storage tanks play a vital role in the industrial safety of the entire industry. This paper summarizes the development of tank anti-corrosion technology in petrochemical industry at present, discusses the mechanism of tank inside and outside corrosion, various anti-corrosion measures, highlights the importance of tank anti-corrosion protection, and looks forward to the future development of tank anti-corrosion technology. Petroleum is the blood of modern industry and serves the national energy security. The anti-corrosion measures of storage tanks are of great significance to the key deployment of strategic oil reserves in China.