In the development of civil engineering, engineering practical experience often precedes theory, and engineering accidents often show unforeseen new factors, which lead to the research and development of new theories. So far, the treatment of many engineering problems still depends on practical experience to a great extent.
There are two reasons why the development of civil engineering technology mainly depends on engineering practice rather than scientific experiments and theoretical research: First, some objective conditions are too complicated to carry out indoor experiments or field tests and theoretical analysis truthfully. For example, the stress and deformation of foundation, tunnel and underground engineering and their changes with time still need to be analyzed and judged with reference to engineering experience. Second, only by carrying out new engineering practice can new problems be revealed. For example, high-rise buildings, towering towers and long-span bridges have been built, and the problems of wind resistance and earthquake resistance of the project are prominent, so new theories and technologies in this field can be developed.
In the long-term civil engineering practice, people not only pay great attention to architectural art, but also have made outstanding achievements; In addition, for other engineering facilities, by using different building materials, such as stone, steel and reinforced concrete, many projects with beautiful art and good functions are in harmony with the natural environment. The Great Wall of Wan Li in ancient China, many TV towers in the modern world and Zhang Qiao are all examples.