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skin friction 表皮摩擦。

skin game

On the basis of construction technique of large diameter bored hollow pile of prestressing force concrete , through simulation test , this paper simulates the interaction of pile with side mediator and pile with end mediator respectively under different conditions of injected cement paste , analyses the changing regularity of ultimate skin friction in different depths and different mediators , and also studies the changing regularity of end resistance in different end mediators 本文在對大直徑鉆埋預應力混凝土空心樁的施工工藝分析研究的基礎上,通過室內模擬試驗,分別模擬樁與樁側、樁端介質不同注漿情況下的相互作用性狀,分析了樁側介質變化時不同深度處樁側極限摩阻力的變化規律和樁端介質變化時樁端承載力的變化規律。

All of the results indicated the turbulent boundary layer had been turned into the laminar layer . the skin friction coefficient drops rapidly . this result not only proved the phenomenon of reverse transition had occurred , but also showed that this condition was drag - reducing condition 實驗結果表明板面附近的流動已由湍流流動轉變為層流流動,同時平板表面的摩擦系數較沒有溫度梯度時有大幅度下降,不僅證明了邊界層逆轉捩現象的存在,也說明了這種條件起到了減阻的效果。

The mechanism and some new work laws of negative skin friction along the single pile or wharf bent piles is analyzed . the engineering construction measure decreased the negative skin friction is presented . an improved empirical formula has been put forward for the calculation of the negative skin friction 研究得出港口碼頭樁基、排架樁基受到負摩擦力作用時的工作機理、發現新的規律,發現樁負摩擦力的性狀和有利的工程施工措施,并提出港口單樁、排架樁基負摩擦力的計算方法。

Based on the assumption that the form of skin friction is not significant , the paper calculate the coefficients through the corresponding equation between shearing stress and displacement , it is appropriate under many conditions . the model of pile foundation is developed based on the above theory and method . the pile is simplified as a nonlinear elastic spring 本文認為樁側阻力分布形式對下臥層附加應力的影響不大,從樁的剪應力和樁體位移間的對應關系方程上求解了樁端荷載分配系數,相對比較合理,在大多數情況下是可以為工程所接受的。

The grouting test result shows that this technique of pile foundation construction is effective , it can not only increase the upper and skin friction of the cast - in - place pile , but also improve the bearing capacity of the cast - in - place pile , and gain a larger economic benefit for whole project at the same time 經樁端壓漿實驗結果表明,該技術可以增加鉆孔灌注樁樁端阻力和樁側壁摩阻力,是一項行之有效的樁基施工技術,它可有效提高鉆孔灌注樁的承載能力,同時提高經濟效益。

The further research in port engineering pile foundation is considered to be important of such as behavior and bearing capacity of laterally loaded single piles and pile groups , and the functional mode of wharf foundation pile under flood tide torrent , and load - deflection curve , and negative skin friction along the pile , et al . the bearing capacity and the negative skin friction of port engineering piles are analyzed , to satisfy port engineering development demand better 在港口樁基工程領域,港口工程水平承載(群)樁的工作性狀以及承載力計算方法,漲潮急流等動態荷載作用條件下碼頭基樁的受力性狀,樁的作用荷載與變位趨勢關系、樁的負摩擦等問題都要求作進一步的研究。本文致力于以港口工程樁基為主要研究對象,對港口工程(群)樁基水平承載力和負摩擦力進行研究,以更好地滿足港口工程建設需要。

The test of negative skin friction along the single pile or wharf bent piles , which is modeled after piles of zanjiang harbor , is studied 結合湛江港某碼頭工程基樁,用模型試驗模擬現場地質情況,對港口單樁、排架樁基負摩擦力進行模型試驗。

The solution presents representative profiles for the dimensionless velocity and the skin friction coefficient at different permeability and injection parameters 給出了量綱為一的速度分布以及在不同滲透參數情況下壁摩擦系數的變化。

Turbulent skin friction 紊流摩擦

Skin friction stress 表面摩擦應力

Boundary layer skin friction 邊界層表面摩擦

Boundary - layer skin friction 邊界層表面摩擦

Negative skin friction of pile 深基礎負摩擦力

Negative skin friction of driven pile 打入樁負摩阻力

Finite - element algorithm for skin friction calculation on 3 - d body surface 三維物體表面摩阻的有限元算法

Study of internal force of ring tunnel in stratum skin friction 土層摩阻力對圓形隧道的結構內力分析研究

Study on calculation of negative skin friction resistance on piles 基樁負摩阻力計算方法初探