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一、前言矩形桥墩基础設計曲綫化,早在一九五八年已經使用,几年来經过不断总結提高,特別經过矩形桥墩标准設計以后,形成了一整套比較完善的設計方法。好处很多,有以下几点: 1.用应力曲綫(不用試算法),能准确地求出任意規定的基底应力的基础尺寸。 2。在考虑了(M_x)/b=(M_y)/d这一关系式的基础上,合理地确定了如何逐层放置襟边的原则,使在規定的任何基底应力下,基础圬工数量为最省。 3.用偏心曲綫划分符合各种規定的偏心限值时,基础尺寸的范围。这三点均集中反映在一张曲緩图上,加快了設計速度,保証設計质量,工效提高五倍以上,基底应力σ精确度在0.1kg/cm~2以內。
I. INTRODUCTION The curve design of the basic design of rectangular piers has been used as early as 1958. After several years of continuous improvement, the standard design of rectangular piers has formed a complete set of relatively complete design methods. There are many advantages, the following points: 1. With the stress curve (without trial and error method), can accurately calculate the base size of the foundation stress. 2. On the basis of considering the relationship of (M_x) / b = (M_y) / d, the principle of how to place the skirts layer by layer should be rationally determined so that the maximum amount of foundation work under any specified base stress province. 3. Determine the range of basic dimensions when the eccentric curve is used to demarcate the eccentric limits in accordance with various regulations. These three points are concentrated in a song slow map, speed up the design speed, to ensure design quality, work efficiency increased more than five times, the substrate stress σ accuracy within 0.1kg / cm ~ 2.