Based on plate loading test in - situ , the method of geddes " formula , finite element method and the relative theory of method of code , the paper makes a thorough study on the bearing capacity and settlement of vertically loading cast - in - situ piles with expanded branches and plates , and the major results are as follows : ( 1 ) based on the results of plate loading test in - situ , the single pile settlement behavior is analyzed . it is pointed out that its load - settlement ( q - s ) curve as tardy deformation 本文结合现场静载荷试验、 geddes公式法、有限元法和《规范》法中的有关理论，对挤扩支盘桩在竖向荷载作用下的承载力及沉降进行了研究，主要表现在以下几方面： ( 1 )在现场静载荷试验结果的基础上，分析了挤扩支盘桩单桩沉降特征，指出其荷载沉降( q s )曲线为缓变形。
In order to solve need badly three - ring type gear reducer ( problems of high vibration , high temperature and short spin arm bearing life in operation , by means of power separation flow , elastic ring equilibrating load , tardy down and assimilation vibration of synchronous belt transmission , and mechanism balance principle , the author designs a new type three - ring type gear reducer with arc tooth synchronous belt transmission , the gear reducer is fully balancing , equilibrating load and reducing vibration and phase difference 180 ( of mass eccentricity 为解决一般三环减速器振动大、温升高和转臂轴承使用寿命短等生产中迫切需要解决的问题，依据功率分流、弹性环均载、同步带缓冲及吸振和机构平衡原理，设计出了一种具有圆弧齿同步带传动的完全平衡、均载减振，偏心相位差为180的新型三环减速器。
