According to the method in paper , roughness of bedrock surface of north anchor pit of runyang bridge is described in quantitative fractal dimension , and the method of determining frictional resistance of the whole anchor under many factors is discussed , which offers a new ideal and approach for precise determination of frictional resistance of rock mass engineering 依据文中方法,对润扬大桥北锚碇基坑建基面粗糙度进行了定量分维描述,探讨了考虑多种因素条件下整个锚碇摩阻力的确定方法,为岩体工程摩阻力的准确确定探索了一条新的思路和途径。
In consideration of the soil arch effect between anti - slide piles , a calculation formula for the anti - slide pile spacing was developed , taking the following factors as the controlling conditions - the static equilibrium equation of the frictional resistance and adhesive force between the side of piles and slope soil , which sustains the thrusting force of the landside , and the strength conditions at the medial cross - section and two end sections of soil arch 摘要考虑抗滑桩桩间土拱效应,以桩侧与边坡土体间的摩阻力及黏着力承担滑坡推力的静力平衡条件和土拱跨中与拱脚处截面的强度条件共同控制,建立了抗桩间距的计算公式。
According to the the regression analysis on the bloting and shotcreting roadways of henan pingmei group , the regression equation on the degree that absolute grade and area of roadway influence coefficient of frictional resistance is built in the paper . the notable character test of the regression equation is completed . at last , the degree that absolute grade and area of roadway influence coefficient of frictional resistance is discussed and summed up . the practical and guiding sense in choosing coefficient of frictional resistance of congeneric roadways is given in the paper 通过对平煤集团大量的锚喷巷道的回归分析,建立了巷道壁面绝对粗糙度和巷道断面积对摩擦阻力系数影响程度的回归方程,并对回归方程作了显著性检验,最后对巷道粗糙程度和断面积对锚喷巷道摩擦阻力系数的影响程度进行了讨论和总结,对同类巷道摩擦阻力系数的选取具有实践指导意义。
In this dissertation , based on experiments , the mechanical behaviors of the soil between piles are studied . a more reasonable method computing the bearing capacity is presented . theoretical formula is derived to compute the lateral frictional resistance of single pile 本文将结合实际工程,在室内外试验的基础上,研究打桩后桩间土力学性状的变化规律,提出更加合理的搅拌桩复合地基承载力计算方法,推导出单桩桩侧摩阻力的理论计算公式以及有效桩长的理论计算公式,最后采用有限元方法对单桩以及群桩进行数值分析。
With a suggested displacement model , this dissertation takes the interaction of soil and piles into consideration and derives an analytical - function of compressive deformation of stabilized layer of composite foundation under embankment . analytical - functions are also derived of frictional resistance between pile and soil and of the pile - soil stress ratio 本文在假设的位移模式下,考虑桩土相互作用,通过力学推导,得到了路堤荷载下复合地基桩侧摩阻力、加固区桩间土压缩量和桩土应力比的解析表达式。
The friction coefficient , critical vertical loads and critical frictional resistance strength have been worked out by means of the pullout tests under the different vertical loads , analysis of frictional characteristics between soil and material and analysis of the different work mechanism between direct shear test and pullout tests . the creep characteristic parameters of some typical reinforcement materials have been obtained by the creep tests under the loads for a long time and the rheological analysis 对几种典型筋材在不同法向荷载下进行了拉拔试验,并进行了筋材与土介质的界面摩擦特性分析,直剪试验与拉拔试验不同机理分析,找出了影响摩擦特性试验结果的主要因素;得出了筋材在工作荷载阶段的摩擦系数、临界法向中南大学博士学位论文荷载和临界摩阻强度。