采用太沙基有效应力原理并结合观测得到的数据，对真空井点降水联合预压加固软土地基的机理及加固有效深度、有效应力的变化问题进行了理论分析。
Terzaghi, the mechanism of improving the soft ground by vacuum well-point dewatering and preloading and the change of effective stress and effective reinforcement depth were studied.
那时Q 4000会控制连接阻塞管和压井管到油井的真空阀。
The Q4000 will then have control over the valves that connect the choke and kill lines to the well proper.
采用真空预压法有效加固的深度小于动态完整井所能达到的深度、其残余沉降量大于其竖向回弹量。
By the vacuum preloading, the efficient reinforced depth is less than the depth of the dynamic full-wells, and the remained sedimentation is more than the vertical sprang quantity.
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