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普通單軸水泥攪拌樁專項施工方案(10頁)
普通單軸水泥攪拌樁專項施工方案(10頁).doc
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上傳人:正*** 編號:461556 2022-07-19 9頁 69.50KB

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1、編制人:審核人:浙江*建設有限公司 2012年 月 日水泥攪拌樁本工程水泥攪拌樁徑為600,中心距為450mm水泥攪拌樁的水泥采用42.5Mpa普通水泥,水灰比0.5,水泥摻合比為15%。一、施工準備工作攪拌樁施工單位在接到施工任務后,除應熟悉工程地質資料和設計圖紙,安排施工流水,編好施工組織設計外,并應著重做好以下各項工作: 1、場地平整與布置 攪拌樁施工現(xiàn)場應在機械設備進場前予以平整。當場地表層較硬需用注水預攪施工時,應在四周開挖排水溝,并設集水井,其位置以不影響攪拌機施工為原則;排水溝和集水井應經常清除沉淀雜物,保持水流暢通。 當場地過軟不利于攪拌機行走或移動時:應鋪設粗砂或細石墊層,不2、得用粗粒碎石鋪填。灰漿制備作業(yè)棚應有足夠的面積,其位置宜使灰漿的水平泵送距離控制在50m以內。2、樁位測量定位根據建設單位提供的坐標點,結合圍護設計圖紙,做好水泥攪拌樁的軸線放樣,樁位定位,各放樣基點用木樁打入土中,木樁四周用磚圍成方形,內填混凝土,在木樁上畫出基點釘上鐵釘,并涂上紅油漆,場內各樁位按基點放樣,各樁位中心點用涂有紅油漆的鋼筋打入土中。樁位放樣完畢后,然后進行二次復測,準確無誤后,請甲方、監(jiān)理方代表驗收并做好測量放線記錄。3、水泥攪拌樁技術參數(shù)、工藝試成樁3.1 本工程止水帷幕大部分采用600普通水泥攪拌樁,采用#425普通硅酸鹽水泥,止水帷幕的水泥摻量為15,水灰比為0.5,內3、摻0.2木鈣和0.05三乙醇胺。3.2試成樁的目的是標定各項施工技術參數(shù),其中包括:攪拌機鉆進深度、樁底標高、樁頂或停灰面標高;灰漿的水灰比、外摻劑的配方;攪拌機的轉速和提升速度;灰漿泵的壓力;每m樁長或每根樁的輸漿、灰漿經輸漿管到達噴漿口的時間;是否需要復攪復噴及其部位、深度,等等。二、施工工藝1、 定位 用起重機懸吊深層攪拌機到達樁位并對中; 當?shù)孛娓叩筒黄綍r應使起重機保持平穩(wěn);如用板架在軌道上就位,軌道應不斷按要求移動調整; 2攪拌下沉 攪拌機冷卻水循環(huán)正常后,啟動攪拌機電機,放松起重機或樁架的鋼絲繩,使攪拌機沿導向架切土攪拌下沉,使土攪松,下沉速度由電機的電流監(jiān)測表控制,工作電流不應大4、于10A(如下沉速度太慢,可從輸漿系統(tǒng)補給清水以利鉆進)。 當攪拌機下沉至一定深度時,即開始按預定摻入比和水灰比拌制水泥漿,并將水泥漿倒入集料斗備噴;3噴漿攪拌提升攪拌機下沉到設計深度后,開啟灰漿泵,其出口壓力保持0.40.6MPa,使水泥漿自動連續(xù)噴入地基,攪拌機邊噴漿邊旋轉邊嚴格按已確定的速度提升,直至設計要求極項標高,集料斗中的水泥漿正好排空;4重復攪拌下沉為使已噴入土中的水泥漿與土充分攪拌均勻,再次將攪拌機邊旋轉邊沉入土中,直至設計要求深度; 5重復攪拌提升一般情況下即將攪拌機邊旋轉邊提升,再次回至設計樁頂標高,并上升至地面,制樁完畢;當水泥漿摻量較大時,也可留一部分水泥漿在重復攪拌提5、升時噴用;對樁頂以下23m范圍內或其他需要加強的部位,可在重復攪拌提升時增噴水泥漿;6、清洗向已排字的集料斗注入適量清水,開啟灰漿泵,清洗管道中殘留水泥漿,直至基本干凈,同時將粘附于攪拌頭的土清洗干凈; 7、移位 重復上述一至六步驟,進行下一根樁的施工。三、施工方法1、工藝流程:樁機就位對準樁位噴漿、攪拌到設計深度水泥漿制備過濾輸漿攪拌提升二次噴漿、攪拌到設計深度攪拌提升攪拌完畢2、施工管理 (1) 進場的材料材質必須符合設計及施工規(guī)范的要求,需抽檢試驗的必須經抽檢試驗合格后方可使用。 (2) 樁機鉆頭對準樁位,定位誤差不大于2cm。 (3) 鉆桿垂直度誤差不大于1100H。 (4) 水泥漿必6、須攪拌均勻,水泥漿每次攪拌時間不少于分鐘。 (5) 水灰比:水灰比控制在0.50。 (6) 擠壓泵壓力控制在0.40.6Mpa左右。(7) 鉆進、提升速度0.8mmin。 (8) 在攪拌開始時應確認水泥漿從噴口噴出,否則不能鉆進,鉆至底后攪拌1分鐘后再均勻提升。(9) 在制樁過程中若發(fā)生意外造成停機或停止噴漿時,必須重新從地面開始攪拌制樁,以防止斷樁發(fā)生。不得留一定長度搭接后中途開始工作。 3、施工管理注意事項 攪拌樁現(xiàn)場施工管理包括勞動組織、生產效率、安全技術和質保措施等內容,要建立和健全質保體系,并切實注意以下事項: 1漿體拌制后應有防止其發(fā)生離析的措施; 2攪拌機預攪下沉時一般不宜沖水,7、只有遇較硬土層而下沉太慢時,方可適量沖水,并須考慮沖水對樁身強度的影響; 3施工中因故停漿(停粉)時,宜將攪拌機下沉至停漿(停粉)點以下0.5m,待恢復供漿(供粉)時再攪拌提升; 4當噴漿(粉)口到達樁項設計標高時,直停止提升,攪拌數(shù)秒,似保證樁頭均勻密實; 5施工停漿(粉)面應高出樁頂設計標高0.5m,待基礎施工或帽梁施工時再將該多余部分鑿除; 6樁與樁搭接的間隔時間不應大于12h,如間隔時間太長,搭接質量無保證時,應采取局部補救或注漿措施; 7 當設計要求在樁體內插入加勁材料時,必須在攪拌成樁后24h內插畢;8必須做好每一根樁的施工記錄,深度記錄誤差應不大于100mm,時間記錄誤差不大于58、s;9、每臺樁機每天應留置水泥土試塊1組,設計抗壓要求大于0.8Mpa。4、施工允許偏差有關規(guī)范規(guī)定為下列數(shù)值:樁身垂直偏差:1;樁位偏差:50mm;樁徑偏差:4;樁頂標高:應超高500mm;樁底標高:, 200mm。四、施工過程檢驗必須經常檢查施工記錄,根據每一根樁的水泥用量、外摻劑用量、水泥漿液的均勻性或噴粉參數(shù)、攪拌次數(shù)和時間以及成樁深度等對其質量進行評價,如發(fā)現(xiàn)缺陷,應視其所在部位和影響程度,及時采取補樁、注漿或其他加強措施。五、施工人員、機械配備1、勞動組織分工本工程打樁階段勞動力安排如下:樁機操作員4人,焊工1人,要求持證上崗,噴漿工4人。2、施工進度計劃計劃深層攪拌樁機一臺,平均9、每天打樁二十根,控制在50天內完成。3、施工設備配置序號設備名稱型號規(guī)格單位數(shù)量用途1水泥攪拌樁機單軸臺1打樁2制漿機臺1制漿3送漿泵臺1送漿g an employment tribunal claimEmployment tribunals sort out disagreements between employers and employees.You may need to make a claim to an employment tribunal if: you dont agree with the disciplinary action your employer has ta10、ken against you your employer dismisses you and you think that you have been dismissed unfairly.For more information about dismissal and unfair dismissal, seeDismissal.You can make a claim to an employment tribunal, even if you haventappealedagainst the disciplinary action your employer has taken ag11、ainst you. However, if you win your case, the tribunal may reduce any compensation awarded to you as a result of your failure to appeal.Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are complaining about happened12、. If your application is received after this time limit, the tribunal will not usually accept it.If you are worried about how the time limits apply to you, take advice from one of the organisations listed underFurther help.Employment tribunals are less formal than some other courts, but it is still 13、a legal process and you will need to give evidence under an oath or affirmation.Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the organisations listed underFurth14、er help.If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your compensation if you win the case. This is known as adamages-based agreement. In England and Wales, your solicitor cant charge you more than 35% of your compe15、nsation if you win the case.If you are thinking about signing up for a damages-based agreement, you should make sure youre clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including16、 those that give advice by e-mail, click onnearest CAB.For more information about making a claim to an employment tribunal, seeEmployment tribunals.The (lack of) air up there Watch mCayman Islands-based Webb, the head of Fifas anti-racism taskforce, is in London for the Football Associations 150th a17、nniversary celebrations and will attend Citys Premier League match at Chelsea on Sunday.I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport.For me its about how he felt and I would like to speak to him first to find out what his experience was.Uefa hasopened18、 disciplinary proceedings against CSKAfor the racist behaviour of their fans duringCitys 2-1 win.Michel Platini, president of European footballs governing body, has also ordered an immediate investigation into the referees actions.CSKA said they were surprised and disappointed by Toures complaint. I19、n a statement the Russian side added: We found no racist insults from fans of CSKA.Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day; May be back in the past, to oneself the paranoid weird belief di20、sillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it.一字開頭的年齡已經到了尾聲。或許是愧疚于自己似乎把轉瞬即逝的很多個不同的日子過成了同一天的樣子;或許是追溯過去,對自己那些近乎偏執(zhí)的怪異信念的醒悟,這21、些天以來,思緒一直很凌亂,在腦海中不斷糾纏。總覺得自己自己似乎應該去做點什么,或者寫點什么。二十年的人生軌跡深深淺淺,突然就感覺到有些事情,非做不可了。The end of our life, and can meet many things really do?而窮盡我們的一生,又能遇到多少事情是真正地非做不可?During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found 22、that those things are optional; Junior high school, thought to have a crush on just means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isnt really grow up, it seems is not so important; Then in high school, think dont want to give ven23、t to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already cant remembe24、r his appearance.童年時,覺得壓歲錢和新衣服是過年必備,但是隨著年齡的推進,會越來越發(fā)現(xiàn),那些東西根本就可有可無;初中時,以為要有一場暗戀才意味著真正的成長,但三年過去后,自己心平氣和的寫同學錄的時候,突然就發(fā)現(xiàn)是不是真正的成長了,好像并沒有那么重要了;然后到了高中,覺得非要吐露出自己的心聲才能為高中生涯里的懵懂情愫劃上一個句點,但畢業(yè)晚會的時候最終還是被梗塞在了咽喉,后來再次站在他曾經揮汗如雨的球場,看著他投過籃球的球框時,突然間發(fā)現(xiàn)自己已經想不起他的容顏。Originally, this world, can produce a chemical reaction to a25、n event, in addition to resolutely, have to do, and time.原來,這個世界上,對某個事件能產生化學反應的,除了非做不可的堅決,還有,時間。A persons time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last26、. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a self-righteous spiritual.一個人的時候,自己的想法總是特別地清晰。想要的,不想要的,界限明確,好像沒有什么可以撼動自己。也曾經好像已經下定了決心去做某件事,但27、更多的時候是最后又打起了退堂鼓。嫌惡過自己的怯懦,最終卻發(fā)現(xiàn)有很多緣分,有很多錯過,好像冥冥之中真的已經注定。那些曾經所謂的非做不可,只是青蔥年華里自己給自己注射的一支強心劑,或者說,是自以為是的精神寄托罷了。At the moment, the sky is dark, the air is fresh factor after just rained. Suddenly thought of blue plaid shirt; Those were broken into various shapes of stationery; From the corner at the beginn28、ing of deep friendship; Have declared the end of the encounter that havent start planning. Those years, those days of do, finally, like youth, will end in our life.此刻,天空是陰暗的,空氣里有著剛下過雨之后的清新因子。突然想到那件藍格子襯衫;那些被折成各種各樣形狀的信紙;那段從街角深巷伊始的友誼;還有那場還沒有開始就宣告了終結的邂逅計劃那些年那些天的非做不可,終于和青春一樣,都將在我們的人生中謝幕。Baumgartner the d29、isappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm - winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmo30、sphere (the troposphere) where our day-to-day weather lives. It will climb higher than the tip of Mount Everest (5.5 miles/8.85 kilometers), drifting even higher than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and into the stratosphere. As he crosses the boundary layer31、 (called the tropopause),e can expect a lot of turbulence.The supersonic descent could happen as early as Sunda.The weatheThe balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform.Below, the32、 Earth becomes the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, hell be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jumpWhen he 33、jumps, he is expected to reach the speed of sound - 690 mph (1,110 kph) - in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him completely.If he goes too fast or spins out of cont34、rol, he has a stabilization parachute that can be deployed to slow him down. His team hopes its not needed. Instead, he plans to deploy his 270-square-foot (25-square-meter) main chute at an altitude of around 5,000 feet (1,524 meters).In order to deploy this chute successfully, he will have to slow35、 to 172 mph (277 kph). He will have a reserve parachute that will open automatically if he loses consciousness at mach speeds.Even if everything goes as planned, it wont. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters).cause there
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