CAJ | 학술논문

在铁路桥梁桩基计算工程中，经常会遇到不等长桩、不等径桩和不对称桩的计算，以及山区陡坡上单桩水平承载力的验算，岩溶、液化土、湿陷性黄土等不良地质的桩基计算。文章根据《铁路桥梁地基和基础设计规范》m值法的原理推导引申出不等长桩、不等径桩和不对称桩的计算方法，并参考《建筑桩基技术规范》的计算方法验算山区陡坡上单桩水平承载力，结合多年来铁路多条线路的设计经验，总结了陡坡处自由桩长计算、湿陷性黄土摩阻力取值、地震液化土层力学指标折减、岩溶区桩端顶板安全厚度计算这些不良地质情况下桩基计算参数的取值。从而弥补了《铁路桥梁地基和基础设计规范》中铁路桥梁桩基计算方法的不足，在实际设计过程中得到很好地应用。
재철로교량장기계산공정중，경상회우도불등장장、불등경장화불대칭장적계산，이급산구두파상단장수평승재력적험산，암용、액화토、습함성황토등불량지질적장기계산。문장근거《철로교량지기화기출설계규범》m치법적원리추도인신출불등장장、불등경장화불대칭장적계산방법，병삼고《건축장기기술규범》적계산방법험산산구두파상단장수평승재력，결합다년래철로다조선로적설계경험，총결료두파처자유장장계산、습함성황토마조력취치、지진액화토층역학지표절감、암용구장단정판안전후도계산저사불량지질정황하장기계산삼수적취치。종이미보료《철로교량지기화기출설계규범》중철로교량장기계산방법적불족，재실제설계과정중득도흔호지응용。
In the calculation of pile foundation for railway bridges,calculations are always required for unequal-length pile,unequal-diameter pile and asymmetric pile,and for the horizontal bearing capacity of single pile on abrupt slope in mountainous area and the calculation of pile foundation in unfavorable geology such as karst caves,liquefied soil and collapsible loess.In the paper,according to principle of m value method in“Code for Design on Subsoil and Foundation of Railway Bridge”,a calculation method is derived for unequal-length pile,unequal-diameter pile and asymmetric pile;A check is made on horizontal bearing capacity of single pile on abrupt slope in mountainous area referring to the calcu-lation method in “Technical code for building pile foundations”;Combined with the design experiences of various rail-way lines for many years,a summarization is made on parameter values for calculation of pile foundation under such un-favorable geology conditions as abrupt slope,collapsible loess,earthquake liquefied soil and karst area,which will make up the shortage of calculation method for pile foundation of railway bridge in“Code for Design on Subsiol and Foundation of Railway Bridge”and are successfully applied in the design.