Li Wenxian: the bright star of Chinese wisdom   

Li Wenxian, this is a stranger's name outside the world. You may not know him, but you may be familiar with the cable technology of the low tower cable stayed bridge, but for the mechanical industry, it is also famous.

Give up the bustling metropolis of a galaxy of talents, from the developed coastal areas, only in his study to do a small company in Guangxi Liuzhou, unknown to the public. The mountains formed by the Karst landform do not hide his eyes. For many years, he has been rushing around. Any place related to lasso will have his footprints.

China's first pagoda cable-stayed bridge was established in Zhangzhou, Fujian, and the Chinese cable-stayed bridges were all high tower before. In 1994, Japan built the first short pagoda cable-stayed bridge in the world. The cable from the middle pylon through rather than continuous, high tower as the anchor in the tower. The lateral tension of the cable to the cable tower is almost no, only the vertical pressure. In addition, its landscape and economy are also better.

Ouweimu company undertakes the construction of the Zhangzhou bridge cable system. During that time, Li Wenxian ran to Zhangzhou. He found that the cable system in Japan still has the problems of too large cable saddle stress, cable trouble, uneven anti slide force and poor waterproof effect. "I always think about how to improve and improve its technology." Li Wenxian said.

He started from the saddle. Through the cable pylon implanted into the saddle structure, its defect is inside and outside of the saddle tube contact stress is too large, may cause cracking of concrete, and the lower strand will be squeezed above and from the side of steel strand, stress corrosion; saddle steel strand in the future to check, steel strand replacement is also difficult to achieve.

Li Wenxian put forward the solution with a cluster of Konso saddle, saddle is put by the thick pipe into a small hole honeycomb, each hole through a steel wire. Thus, the stress of the cables can be dispersed evenly to the pylon, and there is no mutual extrusion between the strands, so the stress condition is obviously improved. Meanwhile, the problem of corrosion prevention is also solved.

When the technical scheme proposed in the literature of Konso Li cluster saddle, he consulted many enterprises, but because of too high technical difficulty, who are not out of the saddle casting.

He wanted to be able to switch to a new saddle welding technology do? He is going around, and finally persuaded the company to try. After failing again and again, the worker told the general manager of the company, "how can we make things out of that neuropathy?" the general manager encouraged you not to be discouraged and to improve the technology repeatedly. In a lot of scrap products, the world's first wire pipe saddle was born.

In 2003, the shredded cable saddle passed the model test and was successfully applied to the Lanzhou West Lake bridge for the first time.

Both the inner and outer saddle and the newly invented wire saddle are facing the problem of the relative sliding of the cable in the saddle after installation. Anti skating is one of the key technologies. The team led by Li Wenxian has constantly studied the anti skid technology and has now reached the sixth generation, one side two-way anti sliding device. "Ouweimu extradosed cable-stayed bridge cable products can occupy 80% of the domestic market, the main is our technology has been leading innovation."

International shared cable technology

In the design of the KUMGA bridge of the pagoda cable-stayed bridge, the South Koreans met the problem of overstress on the tower. In a Japanese's recommendation, the Koreans find ovm. Li Wenxian solved their problem. Ouweimu later fell swoop in South Korea KUMGA construction bridge cable system. But the Koreans have to test the technology again and go to Switzerland to do the lasso fatigue test. The cable anchorage and ouweimu Korean steel strand test, two test results failed.

Because of the high cost of the test, the Koreans said that the failure would have to be made by the Chinese. After Ovim's analysis, the reason for the failure is that the performance of the steel strand in South Korea is not up to the requirement, and it is put forward for the change of the steel strand of Ovim. Results the use of the Chinese product test was successfully passed.

After the KUMGA bridge, South Korea also has 5 low tower cable-stayed bridges which also use the Chinese cable system. In the world, Columbia, Bolivia, Bangladesh, Indonesia and other countries have adopted China's low tower cable-stayed bridge cable system.

At present, China has built more than 120 small pagoda cable-stayed bridges, more than the sum of other countries. There are Li Wenxian and the team to solve the key technology of the cable.

At the grass-roots level, Li Wenxian made a lot of achievements: the first prize of 2 new products, the first prize of the new product award, the two prize of the regional science and Technology Progress Award and the three prize of the regional science and technology progress award, three, etc, were 1, ranking the first and 41 patents in the first place. This is the best reward and evaluation of his hard work.