白河特大桥桩基施工方案 1地形平坦开阔，地层由第四系全新冲积层，第四系上更新统冲层组成，局部表覆第四系全新统人工堆积层。第四系全新统冲积层厚度约25～50m，岩性主要为黏土、粉质黏土、粉土、粉砂、细砂；第四系上更新统冲积层厚度大于50m，岩性主要为黏性土、粉土、粉细砂等。管桩深度范围内地层主要为：粉土、黏土、粉质黏土，局部表层为杂填土。coupling Centre shall be checked, the second poured concrete strength of more than 70%. In the proces of reaming or boring, apart from the special provisions in factory, does not allow any work that may afect the coupling Centre, such as irigation, to cylinder conections to flod the condenser pipes and so on. Wel boring, hinge bolt hole flange with coupling of vertical, not oblique. Mounting bolts should be added lubricants, typing gently with a smal hammer, not too loose or to tight, packed the bolts with the coresponding seal screw hole should be marked. 6.4.5.4.2 coupling reamed and pairings is close to the diameter of bolt bearing god hinge holes, dresed with a god two coupling bolts before you can move the rotor, boring-reaming hole in turn. Coupling bolts must be tight coupling is symetrical diameter, in boring, reaming, two bolts out. Wel boring, hinge bolt hole flange with coupling of vertical, not oblique. Due to the coupling bolts in accordance with hinge holes coresponding to the diameter of the screw holes one by one after procesing, procesing back bolt installation location cannot be changed, so acording to bolt after the actual weight difference of nut and lock washer to match. General requirements for coupling two symetrical diameter bolt, nut and lock washer's total weight diference should not be greater than 10 g and knocks stamped mark. (Se Figure 18) The coupling bolts aply lubricant, and then gently with copper home, not to lose or to tight. Bolt Asembly is finished, symmetrical tightening all bolts to 30%, 50%, 70%, 10% force, and check the coupling fluter and before conecting the circle gradualy changes its value should be les than 0.02m. Tightening torque of the coupling bolts shall comply with the technical requirements manufacturers drawings, with a dynamometric wrench or log tension tools. Thre whel rotor swing test coupling conections should be checked: taking leave,1

白河特大桥高墩柱专项方案 一 、编制依据 《铁路桥涵工程施工质量验收标准》TB 10415-2003/J 286-2004 《铁路桥涵工程施工技术指南》TZ213-7005 《铁路桥涵工程施工安全技术规程》TB10303-2009 《张唐铁路白河特大桥施工图纸》 二 、工程概况 赤城白河特大桥位于河北省张家口市赤城县样田乡，跨越白河及112国道，桥中心桩号DK97+961.22，桥全长1636m。桥跨布置为：28-56m简支箱梁+1-20mT梁，下部构造：桥台采用明挖基础，其除均采用钻孔桩基础，桥台为T型台，桥墩根据不同高度采用圆端型实体桥墩、圆端型空心桥墩,本桥墩高主要在35m～58.5m。其中1#墩柱为实心直墩，其余均为30：1的变截面空心墩。 三 、施工工艺流程及工艺要求

3.1.技术准备 ①备齐施工图、规范、标准等有效技术资料。 ②审核施工图纸及设计说明，做好施工图纸审核记录。 ③进行混凝土配合比设计。 ④对原材料进行检验、试验。 ⑤根据控制网中所设置的基线桩、水准标点等资料，进行三角控制网的复测，并根据承台结构的精度要求和施工方案，补充加密施工所需要的各种标桩，建立满足施工要求的平面和立面施工测量控制网；施工前须对设计图纸中的高程、地形等进行核对，若与设计不符时及时提请设计单位解决。 白河特大桥桩基施工方案 2地形平坦开阔，地层由第四系全新冲积层，第四系上更新统冲层组成，局部表覆第四系全新统人工堆积层。第四系全新统冲积层厚度约25～50m，岩性主要为黏土、粉质黏土、粉土、粉砂、细砂；第四系上更新统冲积层厚度大于50m，岩性主要为黏性土、粉土、粉细砂等。管桩深度范围内地层主要为：粉土、黏土、粉质黏土，局部表层为杂填土。coupling Centre shall be checked, the second poured concrete strength of more than 70%. In the proces of reaming or boring, apart from the special provisions in factory, does not allow any work that may afect the coupling Centre, such as irigation, to cylinder conections to flod the condenser pipes and so on. Wel boring, hinge bolt hole flange with coupling of vertical, not oblique. Mounting bolts should be added lubricants, typing gently with a smal hammer, not too loose or to tight, packed the bolts with the coresponding seal screw hole should be marked. 6.4.5.4.2 coupling reamed and pairings is close to the diameter of bolt bearing god hinge holes, dresed with a god two coupling bolts before you can move the rotor, boring-reaming hole in turn. Coupling bolts must be tight coupling is symetrical diameter, in boring, reaming, two bolts out. Wel boring, hinge bolt hole flange with coupling of vertical, not oblique. Due to the coupling bolts in accordance with hinge holes coresponding to the diameter of the screw holes one by one after procesing, procesing back bolt installation location cannot be changed, so acording to bolt after the actual weight difference of nut and lock washer to match. General requirements for coupling two symetrical diameter bolt, nut and lock washer's total weight diference should not be greater than 10 g and knocks stamped mark. (Se Figure 18) The coupling bolts aply lubricant, and then gently with copper home, not to lose or to tight. Bolt Asembly is finished, symmetrical tightening all bolts to 30%, 50%, 70%, 10% force, and check the coupling fluter and before conecting the circle gradualy changes its value should be les than 0.02m. Tightening torque of the coupling bolts shall comply with the technical requirements manufacturers drawings, with a dynamometric wrench or log tension tools. Thre whel rotor swing test coupling conections should be checked: taking leave,2