Objective: To study the relationship between imaging findings on CT or MRI and pathological features of the olfactory groove meningiomas and differential diagnosis.

The engineering tunnel of underground municipal pipeline is the development orientation to solve the problems of the underground municipal pipelines.

The article introduces various design schemes of fire control for the engineering tunnel in China,and probes into the latest fire control techniques,and puts forward a new thinking of the fire control design for the engineering tunnel.

Combined with the engineering tunnel of Jinan Olympiad Gymnasium,the article mainly sets forth the advantages and disadvantages,design principle,design technique,the existing problems and suggestions of the engineering tunnel.

Combined with the design of the utility tunnel in reclamation area of Dalian Free Trade Zone, the design scheme of utility tunnel section, auxiliary facilities and operation management system was introduced, and the key problems to which attention should be paid in the design were discussed.

Combined with the utility tunnel design in Laoshan new campus of Ocean University of China,the design principle,the choice of pipeline,trench installment,the structure and the other subsidiary facilities were introduced in this paper.

The use of utility tunnel is economical and reasonable.