Kelunte Bearing Co., Ltd. , http://www.jnwheelbearings.com
The technology adopts a hydraulic static pressure pressing method to simultaneously press the inner and outer sleeves into the set holding soil layer, and then proposes the inner tube, fills the pile end filler, and then uses the inner tube to press the filler to form the pile end. Repeatedly forming the pile end of the required size several times, at the same time filling a certain dry concrete to enlarge the pile end and then consolidating into one body; then constructing according to the usual pouring pile construction method, forming a static pressure expansion perfusion with the enlarged pile end pile. The technology uses hydraulic static pressing instead of hammering to form the enlarged pile end to avoid large noise, and the hydraulic static pressure reduces the disturbance of the surrounding soil during the pile forming process. . Because the pile-pushing force of each pile can be controlled consistently, the overall settlement problem of the building is better controlled, and the whole process of static pressure is clear from the pressure gauge. The work efficiency is high, and the construction efficiency is equivalent to 2 to 4 times of the rammed pile. The bearing capacity of single pile is controlled uniformly, intuitively, simply and reliably.
A static pressure expanded bottom pile technology developed in the rammed pile technology and a static pressure expanded bottom pile machine were successfully developed by Wujiang Liangong Machinery Co., Ltd. in 2005 and put into use in Hebei at the end of 2005.