Shanghai Jintai Powers the Successful Closing of Baoshan Bridge Station on Hangzhou Metro Line 5

On June 21, 2018, the 69-meter-deep-and-close wall project of Hangzhou Metro Line 5 Baoshanqiao Station, which was constructed by Shanghai Yuanfang Foundation Engineering Co., Ltd., was completed perfectly.

Baoshanqiao Station is located near the intersection of Jianguo North Road and Stadium Road in Hangzhou City. The difficulty of the project is mainly due to the complex geological conditions. 37 meters underground is a layer of mixed soil and dense sand, 37 to 57 meters is a 5-7cm pebble layer, 57 Below the meter is a tuff of 30 MPa, which is a relatively common geological feature in the Hangzhou Bay area.

At the beginning of the project, using an international brand high-power grapple grabbing scheme, the Baoshanqiao subway station site was complex because of the complex rock formations. When a hard stratum was encountered, the grabbed approach was incompetent, and the overall construction progress was slower, even delaying the progress of the project. . To this end, Shanghai Faraway immediately sought a new solution, made decisive choices after extensive comparisons and demonstrations, and purchased a Shanghai Jintai SX40 two-wheel mill and an SG70 grab.

SX40 two-wheel milling is a high-end wall-linked construction product that Shanghai Jintai is proud of. It uniquely combines the groove and the milling groove module on the same host platform, and can realize the function of “one machine and two functions”. In actual construction, the SX milling machine adopts a large-diameter gas lift reverse circulation slag removal system and is perfectly combined with SG hydraulic grabs to efficiently construct underground continuous walls in hard rock and pebbles and other complex formations.

Shanghai Jintai SX40 two-wheel milling

At the Baoshanqiao subway station site, the Jintai SX40 two-wheel milling and the SG70 grab were organically coordinated, and the performance of the construction complemented each other. During the two-and-a-half-month construction period, 40 ground-connected walls were efficiently completed, and the equipment was stable in operation. The slag discharge efficiency is obvious. The footage in the pebble layer can reach 5 meters/hour and the tufa stratum average footage 1.5 meters per hour, which helps the distant Shanghai to snatch the delay period.

"Shanghai Jintai's two-wheel milling is very suitable for complex geology," said the director of Shanghai's distant equipment highly praised the Jintai slotting machine. "Kim Thai's wall-to-wall products have a good reputation in the industry, no matter whether it is the economy of the slot machine or the slot machine. And the applicability has been well integrated. The cost of maintenance and repair in the later period is also relatively low, so we chose Jintai among many brands."

It is worth mentioning that Jintai SG70 is currently the world's largest type of earth-wall grab, and it is called "the king of ground wall grabs" both in terms of grabbing capacity and slotting efficiency, especially suitable for harder formations and Ultra deep tank construction is recognized as a trump card product in the industry. (This article comes from Shanghai Jintai)