The Yachi River Bridge from Guiyang to Qianxi highway was completed smoothly on May 20, 2016. The main span of this bridge is 800m and the full length is 1450m. It is the world’s largest span of steel truss cable-stayed bridge, but also the world’s largest cable-stayed bridge in the mountainous area.
The Yachi River Bridge is the key control project in the whole line of Guizhou highway. The bridge is located in the high mountains and deep valleys. The geological condition is extremely complex and the wind can be up to 11 level so that the construction environment is very hard and difficult. Because of this, the road construction team innovated boldly in the construction and adopted a variety of new technologies and processes to ensure the smooth construction progress of the bridge.
Facing the complicated and hard geological condition, the bridge should be guaranteed with fast construction speed and reliable construction quality. Rock anchor is a very dependable choice for the bridge base construction, especially in the complex geological condition. Rock anchor will provide support resistance immediately to inhibit the loose rock deforming after the excavation and avoid collapse accidents or other diseases in the construction. Rock anchor system combines grouting and drilling in a simultaneous operation. The grouting can be surrounded with the full length of anchor bar and thus greatly increase the durability.
Rock anchor is a new structure and advanced technology. It has reliable anchoring quality and good durability, but also strong adaptability to the formation. It must have a broad prospect for development.