论述静压预制桩压桩力对地表土层和下卧软土层承载能力的要求。
The demand of bearing capacity on the surface soil and soft foundation should be met for the static pressure fabricated pile.
通过工程试验，提出高强预应力混凝土管桩在砂性地基中静力压桩压桩力，并分析产生断桩的原因。
Through engineering trials, this paper brought forward the static installation pressure of PHC piles in sandy soil, and analyzed the reasons why PHC piles were caused to rupture.
液压振动系统的主要特点是在桩机液压系统中的压桩油路产生流体压力变化和波动，从而使沉桩力出现高频的周期变化，产生振动压桩的效果。
The main character of the HVS is that, by means of fluctuating oil pressure, the pile-driving force can be changed in a higher frequency, and therefore better vibrating effect can be gained.
并给出了随着基坑开挖的卸压作用，桩上受到的水平冻胀力呈现减小趋势，最大衰减率达40%。
The horizontal frost-heaving force is attenuated in the process of excavation with the maximum attenuation rate being 40 percent.
泥浆护壁钻孔灌注桩当桩端持力层为砂土层等非岩石层时，通过桩底压密灌浆能有效地提高单桩承载力。
When the bearing stratum at the tip of bored pile is sandy soil stratum, the method of pile tip pressure grouting can effectively improve the bearing capacity of single piles.
结果表明：托桩桩身轴力、位移沿桩身分布呈上弯分布，与压桩的下弯分布相反。
The results indicate that the distribution curves of axial forces and sectional settlement are protuberant, which is contrary to top-loaded piles.
结果表明，施工卸压孔可使排桩所受的水平冻胀力明显减小。
The results indicate that using releasing-pressure holes can sharply reduce the horizontal frost-heaving force aga...
结果表明，施工卸压孔可使排桩所受的水平冻胀力明显减小。
The results indicate that using releasing-pressure holes can sharply reduce the horizontal frost-heaving force aga...
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