雨污水管道基础技术交底记录.doc

交底内容：
1、本工程管道基础为120°砼基础，基础断面如下图所示：具体尺寸见图集95s222-5

                                                t

                                                     C2  
                                                               
                                                     C1
                                

                        a                         a
                                  B=D+2t+2a
2、部分土方基础或有地下水的地段，铺设12cm厚毛石垫层，垫层与基础等宽，并用黄砂灌缝。
3、管道安装采用垫块法施工，将预先做好的垫块或石块放在槽底，将管道放在垫块上进行安管，管道安装完毕后，再浇筑砼管座。
4、管道基础模板采用木模或槽钢，模板要略高于设计砼高度，模板要支设稳固，管道安装完毕便可支设模板，在砼浇筑前要将模板内的杂物、积水清除干净。
5、管基砼标号为C15，砼拌和采用机械拌和，砼拌和时应严格按配比上料，均要设置磅秤。
6、砼浇筑时要从一侧灌注，以使管底的空气排出，当对侧的砼与灌注的一侧砼高度相同时，两侧再同时浇筑，并保持两侧砼高度一致。
7、砼浇筑时，要振捣密实，尤其要注意管道下砼的密实度。
8、管道砼浇筑完成后，要注意覆盖养护，砼要按检测频率留取试块，并与管基砼进行同期养护。
Cards on the table contents:
1, based on the project pipeline for the 120 ° concrete foundation, the basis of cross section as shown below: specific dimensions see gallery 95s222-5

                                                t

                                                     C2
                                                                
                                                     C1
                                 

                        a a
                                  B = D +2 t +2 a
2, part of the earth or groundwater based on the lot, laying 12cm thick stone wool cushion, cushion and the base width, and with yellow sand pouring.
3 piping construction method using pads will do a good job pre-Pad or stones on the bottom of the tank will be placed on pads on pipeline safety tube, pipe installed, and then pouring concrete sockets.
4, pipe with wooden model based on the template or channel, the design template to be slightly higher than the height of concrete, set the template to a solid support, pipe support design templates can be installed, and to put the template in the Pouring the debris, clear water Clean.
5, tube-based concrete numbered C15, concrete mixing by mechanical mixing, concrete mixing ratio should be strictly on the material, have to set the scale.
6, when Pouring from the side of the perfusion, in order to control the end of the air, when the opposite side of the concrete and the perfusion side of the concrete with the same height, on both sides and then pouring the same time, and maintain a high degree of consistency of concrete on both sides.
7, Pouring, be vibrated dense, with particular attention to pipe under the concrete of density.
8, after Pouring pipeline, should pay attention to cover maintenance, according to the frequency of testing concrete sacrificing test block, and concrete for the same period with the tube-based conservation.