英德
有道
百度
谷歌
图片
维基
百科
沉孔 [chén kǒng]
counter bore
- 利用正交实验确定了等离子清洗的最佳条件,利用全面实验研究了等离子清洗,超声波清洗,PI调整等在微孔沉镀铜方面的应用,并通过重复性实验证明了以上实验结论的可靠性,从而实现了在公司现有条件下微孔金属化的目标。
Orthogonal experiments were usedto find the best plasma desmear parameter; thorough experiments were used to studied the application of Plasma,ultrasonic and PI adjuster for micro via metallization pretreatment; at last, repetitive experiments conformed the reliabil-ity of the conclusion, and the expected goal to realize micro via metallization under existing condition was achieved. - 文摘:针对1780工程复杂的地质条件，在人工挖孔灌注桩施工中采用“钢护筒沉筒法”或“孔下预制钢筋混凝土沉筒法”穿过了流沙层，解决了钢筋笼吊装、水下浇灌混凝土等施工关键问题，取得了较好效果。
Abstract: A downhole sinking cylinder method of precast reinforced concrete penetrating through a quick sand layer is used for the construction of the cast-in-place pile of hand dug hole according to the complicated geological conditions.The key problems of hoisting of cage of rebar and of tremie concrete etc are solved with good results. - 文摘:在分析饱和粘土中静压桩的贯入机理的基础上，对静压桩沉桩分析的圆孔扩张理论、应变路径法、有限元分析、滑移线理论和模型槽试验等五种方法逐一进行评述，并提出在传统的平面圆孔扩张理论基础上加以改进，采用准静态空间轴对称方程组对静压桩贯入过程进行模拟，从而得出土体位移、应力、初始超孔压的空间解析解，同时采用有限元分析、模型槽试验相互印证的研究方法.
Abstract: Reviewed are five methods for the analysis of the penetration of jacked-in piles,namely,cavity expansion method,strain path method finite element method,slip line method and calibration model test.After analysis,it is pointed out that it is more rational to adopt sub-statical spatial axisy numerical formulas based on traditional plane-strain cavity expansion method in the analysis.After spatial closed-form solutions are obtained for soil movements,stresses and initial excessive pore pressures generated durihy pile penetration are found out.It is suggested that finite element analysis together with centrifugal model test be used in verifying the results.
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