Close the upper pipe ram 关上部钻杆闸板防喷器
annular pipe ram 环空闸板
pipe ram preventer 管子闸板防喷器
hang-off pipe ram 悬挂防喷器闸板
integral-type pipe ram 整体式管柱闸板
ram air pipe 冲压空气管
ram-air pipe 冲压管
ram pipe 增压管
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。
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。
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.
通过静压对比试验，得出在条件基本相同时，夯扩桩的承载力大于沉管灌注桩。
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