Building bridges is patriotic, and blowing up bridges is also patriotic!

Or: We must build a modern bridge designed and built by the Chinese themselves

At that time, some foreign engineers falsely claimed that Chinese engineers who could build a bridge on the Qiantang River had not yet been born. Woolen cloth! The energetic Mao Yisheng is unswervingly determined: he must build a modern bridge designed and built by the Chinese themselves.

The bridge was designed by the famous bridge engineer Mao Yisheng and presided over the construction. For the first time, the pneumatic caisson dredging and piling were successfully used. It broke the prediction of foreigners that it would be impossible to build a bridge here. He has become more ambitious for the Chinese people. Now the second Qiantang River Bridge with parallel roads and railways has been completed and opened to traffic. It has become the hub of the double-tracking of Zhejiang-Jiangxi and Shanghai-Hangzhou railways. The double rainbow is colorful and magnificent.

The majestic and majestic bridge expresses the heroic aspirations of the Chinese people to stand on their own among the nations of the world. However, the sad and sad saying "after a thousand days of hard work, the bridge was blown up on the day it was opened to traffic" is engraved in it. Make it unforgettable to the Chinese people. The Qiantang River Bridge is not only a great achievement in the history of my country's bridges, but also a glorious milestone in the history of China's railway bridges.

Main events: Two bridge bombings - In order to prevent the Japanese army from blowing up the bridge, the Kuomintang authorities attempted to blow up the Qiantang River Bridge.

Others:

The approach bridge of the Third Qianjiang Bridge in Hangzhou collapsed. It was only 14 years ago that it was completed and opened to traffic. However, the Qiantang River Bridge, located on the Qiantang River along with it, has remained unshakable despite wind and waves for 74 years, and has been hailed as a "strong bridge" by netizens. A netizen posted a question: The bridge built by Mao Yisheng was designed to have a lifespan of 50 years, but it has been 24 years overdue. However, it has not collapsed and has not even undergone major repairs. What is the reason?

The design speed is 20 kilometers per hour, but now it reaches 100 kilometers per hour

The Qiantang River Bridge connects the West Lake Scenic Area and the south bank of the Qianjiang River. It is a two-way double-decker steel bridge.

Walking along the sidewalk, you can see that the bridge is old. Bullet marks can be seen everywhere on the piers and at the bottom of the guardrails - it has been massively bombed three times. The Qiantang River Bridge now carries more than 10,000 cars and more than 150 trains per day.

"When Mao Yisheng was repairing the bridge, it was designed according to a speed of 20 kilometers per hour. The designed load axle load was 50 tons on the railway surface and 15 tons on the highway surface. At that time, there were only more than 150 cars and 4.9 vehicles per day on average. Zhong Guangming, a staff member of the Qiantang River Bridge Memorial Hall who has studied the history of the Qiantang River Bridge, said, "More than 70 years have passed. On this bridge, trains can run at a speed of 120 kilometers per hour, and cars can also run at a speed of 100 kilometers per hour. It’s really amazing that 40-ton or even 60-ton cars are running on the bridge.”

Zhong Guangming said that by today’s standards, the Qiantang River Bridge is not only overdue for service, but also overdue. Limit, overload. "Every time the engineering team completes the assessment of the bridge, they are in awe. At that time, they really regarded the bridge repair as a century-old foundation."

"A bridge that cannot be blown up if the explosives are not placed in the right position"

More than 30 maintenance workers from the Qiantang River Bridge Workshop of the Hangzhou Works Section of the Shanghai Railway Bureau are responsible for maintaining the bridge. He Guangming, the workshop owner who has been working with the bridge every day for the past 20 years, said that the current maintenance is mainly for the railway sleepers. The structure of the bridge has been maintained very well, and the steel beams are only repainted every 15 to 20 years. Just apply a layer of paint.

The bridge has not undergone technical overhaul so far. The repair in 2000 was the largest one, and it only replaced the bridge deck of the highway bridge. "Let me tell you one thing, and you will know how strong this bridge is. This is a bridge that cannot be blown up even if the explosives are not placed in the right position. Piers No. 5 and No. 6 of the bridge were damaged in 1937, 1944 and 1945. It was bombed, but it is still in normal use," Zhong Guangming said.

On December 23, 1937, Mao Yisheng received a secret order to blast the Qiantang River Bridge, leaving only the remaining piers. After the victory of the Anti-Japanese War, in May 1948, under the personal leadership of Mao Yisheng, the Qiantang River Bridge was successfully restored, fulfilling his vow that "the Anti-Japanese War will be won and the bridge will be restored."