陈龙村龙潭石拱桥工程设计总说明书.doc

设计总说明书                       〈三〉防水层: 采用油毛毡，油毛毡厚1厘米。                                  
一、 概述                                        〈四〉基础采用浆砌整毛石，石料强度不低于40号；主拱圈采用浆砌整
陈龙村龙潭石拱桥为陈龙村对外联系的通道之一。 该石拱桥桥面宽确定          毛石石料强度不低于50号；砂浆标号为7.5#，沟缝用水泥砂浆配合比为1:2
7.5+2x0.75米,全桥设置三孔，设计净跨径为12.5+13+12.5米,全桥长为 55.49             四、设计要点
米。桥梁上部结构采用粗料石板拱桥，下部结构采用重力式墩台，基础采用扩大            〈一〉、拱圈按弹性无铰拱进行计算，拱圈计算时未考虑墩台变形对拱
基础。                                                                          圈受力的影响和单向推力的作用，同时也没有考虑拱上建筑的联合作用；拱
  设计荷载: 汽—15级                                                           圈采用等截面圆弧拱圈，矢跨比为1/5。
  人群荷载: 3KNM2                                                                                      〈二〉、抗震设防: 拱桥桥位基础选择在河底岩石上，拱桥矢跨比为1/5，
  地震烈度按7度设防。                             
Brochure Design "三" waterproof layer: oil felt, felt 1 cm thick.
1, Overview "四" The foundation of the entire hair mortar and stone, stone strength of not less than 40; main arch ring using mortar and the whole
Chen Village, Chen Village, Longtan stone arch bridge is one of the external linkages of the channel. The Stone Arch Bridge voluminous to determine strength of rubble stone, not less than 50; mortar grade of 7.5 #, groove joints with cement mortar 1:2
7.5 +2 x0.75 meters, three holes to set the whole bridge, design the net span of 12.5 +13 +12.5 m, length 55.49 4 full-bridge design elements
Meters. Bridge superstructure with coarse stone arch bridge, the substructure using gravity pier foundation will use to expand "一", Arch hingeless arch by elastic calculation, Arch calculation that does not take into account deformation of the arch pier
Basis. The influence circle and one-way impulses, but also does not take into account the combined effects of arch on the building; arch
  Design load: class ring with steam -15 arc arch ring cross section, span ratio is 1 / 5.
  Crowd load: 3KNM2 <2>, seismic design: arch bridge site on the basis of selection in the river bottom rock, arch rise to span ratio of 1 / 5
  Seismic fortification intensity by 7 degrees.