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Guide: Xi'an Tongchuan highway is a national highway planning Baotou, and the actual use of the machine for several 10 years is no problem. It is an important section of the longitudinal line to Maoming in Shaanxi, with a construction mileage of 62 kilometers, including Wei River, Zhuoyu River The three super major bridges of Zhaoshi River are all continuous steel frame bridges. The zhaoshihe bridge of West copper expressway was constructed by the second group company of China Railway 18th Bureau

Xi'an Tongchuan highway is an important section of the Baotou Maoming longitudinal line of the national expressway planning in Shaanxi, with a construction mileage of 62 kilometers, including three major bridges of Wei River, Zhuoyu River and Zhao River, all of which are continuous steel frame bridges

the zhaoshihe bridge on the West copper expressway was constructed by the second group company of China Railway 18th Bureau. In the construction of the pile foundation of this project, the diameter of the pile hole is required to be 2 meters and the depth to be 70 meters, which is relatively rare in the existing engineering construction. The geological conditions of No. 7 bearing platform of zhaoshihe bridge are the worst. About 30 meters underground, it is composed of mudstone and sandstone. The sandstone layer is the thickest, with an average hardness of megapascals. When drilling at a depth of more than 50 meters, the rock hardness reached 56 megapascals (the project department did a slicing pressure test). When drilling at a depth of more than 60 meters, the rock has been ground into powder without blockiness, indicating that the rock hardness reached megapascals, and the geological conditions of this section change greatly

rotary drilling rigs are generally suitable for construction under the geological strength of megapascals and the depth of meters. If it is beyond this range, it will have a great impact on the structure and drilling efficiency of rotary drilling rigs, which will easily lead to equipment losses and a decline in the profits of construction enterprises. Therefore, the pile foundation construction of No. 7 bearing platform has become the most troublesome problem for the project Department of zhaoshihe bridge

in the face of such bad geological conditions, the international famous brand baoe bg40 rotary drilling rig was invited to the construction site, while the domestic rotary drilling rig did not retreat. Sany Heavy Machinery SR360 and CSR heavy industry SR360 rotary drilling rigs came to help. Sany Heavy Machinery SR360 and bao'e bg40 rotary drilling rig jointly dealt with the harsh geology of No. 7 bearing platform, and successfully drove 20 piles, which was highly praised by the project department and user units. On June, 2009, Huicong engineering machinery rushed to the construction site of zhaoshihe bridge on West copper Expressway to appreciate the style of domestic large-diameter deep foundation rotary drilling rig

Sany SR360 rotary drilling rig no matter what instrument it is, the tensile test of the digging and drilling tension machine is one of the most widely used methods to study the mechanical strength of materials. Machine 1

Sany SR360 rotary drilling rig construction site

Sany SR360 rotary drilling rig competes with bao'e BG 40

special design of Sany SR360 rotary drilling rig

operators carefully operate Sany SR360 rotary drilling rig

Sany SR360 rotary drilling rig successfully drove a pile with a depth of 70 meters in No. 7 bearing platform

Sany SR360 rotary drilling rig competes with imported equipment

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Sany SR360 rotary drilling rig users' experience

old users praise Sany for its good service