For the ram compaction piles with composite bearing base, the speed of drawing pipe must be controlled, so as to avoid the gapping or the cut-off.
在复合载体夯扩桩的施工过程中，一定要控制好拔管速度，以免出现缩颈或断桩现象。
2
By using the special ram-extruder, the temperature and pressure in the extrusion course can be ensured and the pipe of high quality and low cost can be obtained.
使用专用的柱塞挤出机，保障挤出过程中所需的温度和压力，可以得到高性价比的管材产品。
3
Through static loading contrast tests, it is found that the bearing capacity of ram-enlarged pile is higher than that of pipe-sinking cast-in-situ pile when both are tested under the same conditions.