Italian Leaning Tower of Pisa was built in 1173 AD, it was designed by a famous architect Bonanno Pisano. It is at the right behind the Romanesque cathedral, is a sign of Pisa. At the beginning of design for about 100 meters high tower, but on five or six years later, the tower from the three layers of began to tilt, until completion continues to tilt. Before it closed, the tower has 3.5 meters to south (i.e., tower deviation from vertical line). In 1990, the Italian government to shut it down, and began to repair.
In practice, many experts on the full history of the Leaning Tower of Pisa and tower building materials, structure, geology, water sufficient research, and use all kinds of advanced instruments and equipment for testing. Pizza medieval historians PiLuoDi professor of research thought, every stone brick to build the tower is a piece of stone carving, stone brick and stone brick so subtle that the adhesion between effectively prevent the tower tilt caused by fracture, become a factor in tower inclined to fail. But now he still emphasize that the urgent task is to find out the secrets of the Leaning Tower of Pisa inclined to fail.
From the thing observed the tower expert professor Gary according to infer the Leaning Tower of Pisa tilt in recent years, the tower will be after 250 because of its focus beyond the outer edge and dumping. But public affairs, the Leaning Tower of Pisa services have close personnel for professor Gary’s views put forward the counter, think only according to mathematical methods of calculation are not reliable. The Leaning Tower of Pisa is “a variety of facts interwoven into comprehensive problem”. Other researchers found that pizza inclined tower was once and then turned to the south east of tilt. They also think that the tower inclined to fail in the past hundred years, but 250 years later I’m afraid to fail cannot be limited to the simple hypothesis and prediction.
Of course the most concerned about the fate of the Leaning Tower of Pisa nature were the men living in Pisa. Although they also worry about the Leaning Tower of Pisa tilt, but instead more is their pride of Pisa. They think that their own hometown to have a thought can be rivalled with famous buildings in the world are proud of the Leaning Tower of Pisa. They believe that it will not fall, and they have such a phrase as sturdy as Pisa Pisa tower people, will never fall. To those who see the Leaning Tower of Pisa to correct vertical suggest most of substance. As in 1934, in the foundation and injection around 90 tons of cement based waterproof engineering implementation, but instead the towers are more instability to move around and lean faster.