146 meters! Sany SR420 creates the deepest record of China's rotary excavation construction!

On May 18, at the construction site of the main pier pile foundation of the Tongminghai Bridge of Donglei Expressway in Guangdong, Beijing Sany Heavy Machinery SR420 successfully solved the construction problems of bridge foundation engineering muddy sand, and created a domestic rotary excavation construction record with a pile diameter of 2.8 meters and a hole depth of 146 meters in one fell swoop.

Tongminghai Bridge spans both sides of Tongming Sea, is an important road section connecting Donghai Island and Leizhou City, the geological conditions are complex, the strata are mostly composed of silty clay, medium sand layer, lower sand layer, etc., and it is easy to collapse holes during construction. At the same time, the design depth of the main pier pile of the cross-sea bridge reaches more than 140 meters, which is far beyond the capacity limit of general rotary drilling equipment, which also discourages many pile foundation construction enterprises. To this end, the construction party, Guangzhou Minfeng Construction Engineering Co., Ltd., specially contacted Sany Pile Driver Research Institute, hoping to get technical support to overcome this problem together.

In the face of such a construction situation, the users of Sany Pile Driver Research Institute believe that Sany SR420 after on-site measurement and evaluationRotary drilling rigsAs a mature model, the equipment reserve coefficient is high, the stability is strong, and the structural strength is high, which can fully meet the construction requirements of large piles and deep piles of the construction party. At the same time, the researchers also carried out a series of customized upgrades to the equipment specifically for the difficulties of the project, so as to further give full play to the technical, performance and quality advantages of the SR420 rotary drilling drill. According to Wang Longgang, director of Beijing Sany Heavy Machinery Rotary Excavation Institute, Sany has adopted multi-layer structure drill pipe design, robot automatic welding and other technologies to adjust the structure of key components, and combined with new construction technology, so as to greatly improve the overall performance of SR420.

Due to the harsh construction environment, in order to ensure the smooth implementation of the project, Sany Pile Driver also dispatched a long-term service team to solve technical problems for customers on site in a timely manner, which effectively guaranteed the smooth and stable operation of the equipment. After technical upgrading, Sany SR420 fully meets the strict construction requirements, and has created a domestic rotary excavation construction record with a pile diameter of 2.8 meters and a hole depth of 146 meters in one fell swoop, successfully filling the gap of domestic rotary drilling equipment in the field of super-large and ultra-deep pile foundation construction, and has been highly praised by owners and equipment users. Luo Minsheng, the person in charge of Guangzhou Civil Construction Association, said that there is no equipment on the market that can meet this construction standard, and Sany equipment solves the construction problems that are difficult to deal with with ordinary machines.

It is understood that as the l* brand of domestic rotary drilling rigs, Sany rotary drilling products have participated in the construction of key projects such as the Qinghai-Tibet Railway, the National Stadium "Bird's Nest", and the Anqing Yangtze River Bridge, and have accepted the test of various construction environments, and completed various construction tasks on time with extremely high work efficiency, showing the best quality.