On the basis of the theory,the paper analyzes the effects,such as permeability,compaction and splitting,of post-grouting to pile shaft and soil around pile tip qualitatively,and the paper also analyzes the change of front-to-back bearing capacity and its influencing factors.
本文应用柱形塑性扩张理论对灌注桩后压浆的最终扩张压力与扩散半径进行推导和计算,定性分析了后压浆对桩侧,桩端土产生渗透、压密、劈裂三种效应机理,应用经验公式分析了压浆前后承载力的变化及其影响因素,通过工程实例总结得出相关结论,对于同类工艺的技术参数选取有现实的指导意义。
In the test of high speed precision spindle ,the high speed may make error separation impossible In this paper, model analysis is applied to testify the possibility of error separation Then the error due to testing with precision spindle instead of precision ball is analyzed, and the setup error of sensors is analyzed as wel
对高速精密主轴的径向误差进行测试 ,主轴的高速可能会使误差分离的方法不再成立 ,通过模态分析 ,验证了该系统的误差分离的可能性。
oil pressure test for tightness
油密试验油压密封试验
perforation compacted zone
炮眼四周挤压密实层
adjustable density chamber
可调压捆密度的压捆室
density-dependent pressure gradient
与密度相关的压力梯度
mechanical seal with low back pressure
背面低压式机械密封
straight side high speed precision press
闭式高速精密压力机
gas-enclosed pressure gauge
气密引压式验尚潮仪
8.2 Pump the 1.5 S.G. mud to kill the well.
泵入密度1.5的泥浆压井。
water pressure test for strength and tightness
水压强度和密封性试验
medium density hay press
中等密度干草压捆机
pressure balanced bearing seal
压力平衡式轴承密封
hermetic pressure-feed type centrifuge
密闭加压进料式离心机
hermetically-sealed frerigerating compressor unit
密封式制冷压缩机组
overshot tubing seal pider
打捞筒油管密封分压器
density profile,pressure profile
密度分布图,压力分布图
The compartments are fully pressurized.
水密舱均已增压完毕.
hydrodynamic mechanical seal
流体动压式机械密封
hydrostatic mechanical seal
流体静压式机械密封