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Chinese ancient leaning tower is well protected

Updated: Jul 31,2015 10:48 AM

Located on Tianmashan in Songjiang District of Shanghai city, the Huzhu Pagoda has shifted slightly over the past few decades - but not enough to spot easily with the naked eye. Data this year suggests the pagoda is now leaning at an angle of 7.1 degrees. But in 1982, the tilt was about 6.5 degrees - much larger than the four-degree tilt of the Tower of Pisa. Visitors are now kept at least two meters from the pagoda.

“We saw the pagoda from far away and were very curious about it. When we stood under it, we felt terrified as if it was falling down,” said a visitor named Tu Fanghua.

The tower was built in 1079 during the Song Dynasty, and was originally part of a complex used to store Buddhist relics. But the rest of the complex was destroyed in a series of fires. The pagoda gradually tilted over the years, as it was located on a slope, with one side of the ground being softer than the other. And it has a large hole on one side of its foundation, which was caused by nearby residents digging for treasure in the area during the 1940s. But experts say the structure is currently safe.

“The pagoda was built with materials similar to today’s concrete, mixed with sticky rice slurry, sand pulp and lime. So the body of the pagoda is very firm. And every level of it has four windows, all facing different directions. So the stress on each side is balanced,” said Cao Yongchun, deputy director of Songjiang Museum.

The pagoda underwent a thorough renovation in the 1980s, with steel rods used to stabilize the structure. But as it continues to shift, authorities are taking new steps to protect it.

“The city’s cultural heritage management authorities have established a modern real-time monitoring station around the pagoda, to get data about land subsidence, cracks and leaning angles. And we will cut off the plants grown on the pagoda and control construction around it. Construction is strictly forbidden 50 meters around,” Cao said.

Local authorities say the leaning tower will not fall down for at least 10 years. And they will carry out another renovation when they detect any obvious change. But before that, visitors can still experience its beauty outside the protective railings.