本桥为跨狮狸沟而设，本桥上部结构为二联2-40m+一联3-50mT梁，T梁采用先简支后连续结构。本桥位于直线上，纵向位于+0.8%上坡段，设计荷载为一级，桥面宽度为净9附2×2.0m人行道，设计洪水频率为1/100，基本地震烈度为Ⅶ级。墩台方向均按路线方向布置。桥面采用15cm混凝土铺装，FYT-1防水层，9cm沥青混凝土。
上部结构进行了截面尺寸的拟定，梁桥自重和二期恒载的横载内力计算，活载内力计算，最不利荷载组合等，为下部结构的检算奠定基础。
下部结构采用钢筋混凝土柱式墩，板式空心墩。基础采用挖孔灌注桩和钻孔灌柱桩。本设计采用容许应力法对此桥下部结构进行设计并检算。对基础，承台按刚性承台板进行设计计算，对桩分别按土的阻力和桩身材料强度计算单桩轴向容许承载力，检算外荷载作用下桩身稳定性和材料强度，检算桩的抗裂性。并对桥墩进行基础沉降和墩顶水平位移检算。最终的计算结果表明，上述所有各项检算均符合各相关规定要求。
关键词：桥梁下部结构桥墩桩
This bridge supposes for the cross lion fox ditch, The bridge structure for the combined 2-40m + a joint 3 - 50m beam，T-beam used in simple and continuous support structure. The bridge is located in straight line, vertical +0.8% at the uphill, Design of a load, the bridge deck width of the net with two 9 ×2.0m sidewalks, design flood frequency of 1 / 100, for the basic seismic intensity Ⅶ level. A pillar direction presses the route direction arrangement. The bridge floor uses the 15cm concrete paving, the FYT-1 waterproof layer, the9cm asphalt concrete.
The superstructure carried on section size drawing up, the beam bridge has been self-possessed with two issue of dead loads lateral load endogen force computations, the live load endogen force computation, the most disadvantageous load combination and so on ,examined for the substructure calculated laid the foundation。
The substructure uses the reinforced concrete pillar, the board style hollow pillar. The foundation uses bored piles and bored piling irrigation. This design uses allowed the stress law bridge the substructure carries on the design regarding this and examines calculated. To the foundation, receives to receive the platen according to the rigidity to carry on the design calculation, separately presses the earth to the pile the resistance and the pile body material strength calculates the single pile axial to allow the supporting capacity, examines outside calculated under the load function the pile body stability and the material strength, examine calculates the pile the crack resistance. And carries on the foundation settlement and the pillar to the bridge pier goes against the horizontal departure to examine calculated. The final computed result indicated that, the above all each item examines calculated conforms to each correlation stipulation requirement.
Keywords : Bridge ，Substructure，Pier ，Pile
