交底內(nèi)容：
1、本工程管道基礎(chǔ)為120°砼基礎(chǔ)，基礎(chǔ)斷面如下圖所示：具體尺寸見(jiàn)圖集95s222-5

                                                t

                                                     C2  
                                                               
                                                     C1
                                

                        a                         a
                                  B=D+2t+2a
2、部分土方基礎(chǔ)或有地下水的地段，鋪設(shè)12cm厚毛石墊層，墊層與基礎(chǔ)等寬，并用黃砂灌縫。
3、管道安裝采用墊塊法施工，將預(yù)先做好的墊塊或石塊放在槽底，將管道放在墊塊上進(jìn)行安管，管道安裝完畢后，再澆筑砼管座。
4、管道基礎(chǔ)模板采用木�；虿垆�，模板要略高于設(shè)計(jì)砼高度，模板要支設(shè)穩(wěn)固，管道安裝完畢便可支設(shè)模板，在砼澆筑前要將模板內(nèi)的雜物、積水清除干凈。
5、管基砼標(biāo)號(hào)為C15，砼拌和采用機(jī)械拌和，砼拌和時(shí)應(yīng)嚴(yán)格按配比上料，均要設(shè)置磅秤。
6、砼澆筑時(shí)要從一側(cè)灌注，以使管底的空氣排出，當(dāng)對(duì)側(cè)的砼與灌注的一側(cè)砼高度相同時(shí)，兩側(cè)再同時(shí)澆筑，并保持兩側(cè)砼高度一致。
7、砼澆筑時(shí)，要振搗密實(shí)，尤其要注意管道下砼的密實(shí)度。
8、管道砼澆筑完成后，要注意覆蓋養(yǎng)護(hù)，砼要按檢測(cè)頻率留取試塊，并與管基砼進(jìn)行同期養(yǎng)護(hù)。
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.
 

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