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江蔣漾路頂管專項(xiàng)施工方案-免費(fèi)閱讀

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【正文】 s discipline, die van ply with national laws and regulations。s eighteen years strict political discipline and political rules, organization and discipline and to implement the central eight provisions of the spirit against the four winds and other requirements into Disciplinary provisions. Not one pace reachs the designated position, focusing on in line with reality, pragmatic and effective. After the revision of major changes, major changes in the code and rule modified and needs to grasp several key problems (a) code code adhere to according to regulations governing the party and party with morals in bination, for at the present stage, the leadership of the party members and cadres and Party members in existing main problems of selfdiscipline, put forward principles, requirements and specifications, showing Communists noble moral pursuit, reflected at all times and in all over the world ethics from high from low 5 mon requirements. One is closely linked to the selfdiscipline, removal and no direct relation to the provisions of . the second is adhere to a positive advocate, eight prohibition 52 are not allowed to about the content of the negative list moved into synchronization amendment cases . Three is for all the party members, will apply object from the leadership of the party members and cadres to expand to all Party members, fully embodies the prehensive strictly required. The fourth is prominent key minority, seize the leadership of the party members and cadres is the key, and put forward higher requirements than the ordinary Party members. Five is to simplify, and strive to achieve concise, easy to understand, easy to remember. The revised code is the ruling Party since the first insists on a positive advocate forAll Party members and the selfdiscipline norms, moral declaration issued to all members of the party and the National People39。s eighteen years prehensive strictly practice. (a) revised two regulations of the party need of the ICAC guidelines in in 1997 Leaders as members of the Communist Party of China clean politics certain criteria (Trial) based on revised, the promulgation and implementation of January 2010, to strengthen the construction of the contingent of leading cadres play an important role. But with the party to manage the party strictly administering the deepening, has not been able to fully meet the actual needs. Content is too plicated, eight prohibition, 52 are not allowed to hard to remember, and also difficult to put into practice。(英文版 ) Two regulations promulgated for implementation is in the party in power for a long time and the rule of law conditions, the implementation of prehensive strictly strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen innerparty supervision of major initiatives. The two regulations supporting each other, the code adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard。(2) 做好臨時(shí)排水系統(tǒng)。(4) 吊裝工作除遵守各種安全操作規(guī)程,嚴(yán)格執(zhí)行統(tǒng)一指揮,統(tǒng)一信號(hào),統(tǒng)一行為,做好管理人員不違章指揮。 ②驗(yàn)收質(zhì)量評(píng)定制度a. 分項(xiàng)工程施工過程中,各分管工種負(fù)責(zé)人必須督促班組做好自檢工作,確保當(dāng)天任務(wù)當(dāng)天完成。 工程質(zhì)量控制總體部署① 建立健全工程質(zhì)量保證體系,加強(qiáng)對(duì)施工過程的控制,使施工工程中直接影響工程質(zhì)量的各個(gè)環(huán)節(jié)因素,全部處于質(zhì)量體系文件指導(dǎo)下的受控狀態(tài),確保工程質(zhì)量滿足規(guī)范要求,發(fā)到預(yù)定的質(zhì)量目標(biāo)。制定總體及各分項(xiàng)工程的施工進(jìn)度目標(biāo),項(xiàng)目經(jīng)理督促檢查生產(chǎn)計(jì)劃,掌握施工進(jìn)度,及時(shí)進(jìn)行人力、物力調(diào)配,以確保工程如期完工。多余泥漿通過泥漿運(yùn)輸車外運(yùn)至指定點(diǎn)。根據(jù)大量的工程實(shí)例,地表沉降值對(duì)泥水平衡頂管可控制在正負(fù)30mm 。(3)采取減少地層移動(dòng)的施工技術(shù)措施:采用泥水平衡式工具管進(jìn)行頂管施工中,要在開始頂進(jìn)段中對(duì)地面沉降和移動(dòng)進(jìn)行監(jiān)測(cè),根據(jù)測(cè)量反饋資料,調(diào)整和選定某段頂進(jìn)中密封土倉艙中的土壓力值,~?;拥牡儡壉M可能延長到井壁洞口的前端,導(dǎo)軌要有足夠剛度,且安裝焊接牢固,安裝后的導(dǎo)軌軸線高程誤差小于2mm。糾編測(cè)量及控制:(1)工程常采用經(jīng)緯儀進(jìn)行簡單有效的地面控制測(cè)量,使地面控制測(cè)量中的誤差趨近1cm,水準(zhǔn)點(diǎn)控制網(wǎng)則利用現(xiàn)有道路已設(shè)水準(zhǔn)點(diǎn)布設(shè)水準(zhǔn)網(wǎng),直接引入工作井內(nèi)。(3)頂進(jìn)的要求:頂進(jìn)前還必須在現(xiàn)場(chǎng)做預(yù)安裝,對(duì)不合格的砼成品予以剔除。頂進(jìn)時(shí),工作人員不得在頂鐵上方及側(cè)面停留,并隨時(shí)觀察頂鐵有無異常現(xiàn)象。(2)停止油泵,打開控制閥,千斤頂回油,活塞回縮。(9)觸變泥漿的配比選材中,對(duì)膨潤土應(yīng)選擇膨脹倍率較大、雜質(zhì)小、顆粒大于150目以上的優(yōu)質(zhì)膨潤土較好。(3)漿液的配置、攪拌、膨脹時(shí)間,都必須按照規(guī)范要求執(zhí)行。(7)在井底較低處,用竹框及紗網(wǎng)做集水坑,保證泥漿泵正常工作。(2)水泵和排泥泵機(jī)座須與預(yù)埋件相連。1內(nèi)置井采用磚砌檢查井工藝同開埋管道檢查井。采用排水封底,是將新老混凝土接觸面沖刷干凈或打毛,對(duì)井底進(jìn)行修整,使之成鍋底形,在中部設(shè)一個(gè)濾鼓,濾鼓下部周圍1000范圍內(nèi)設(shè)厚300的碎石反濾層。地面采用抓斗挖土機(jī)分層開挖,井內(nèi)用人工配合小型挖機(jī)開挖?!?。(2)、井點(diǎn)管的間距選擇:一般根據(jù)井點(diǎn)系統(tǒng)的平面和豎向布置圖,計(jì)算井點(diǎn)的涌水量,從而確定井點(diǎn)管數(shù)量和間距,根據(jù)以往實(shí)際施工經(jīng)驗(yàn)及降水效果,井點(diǎn)管50根為一套,間距選定1m。抽出墊木時(shí)要加強(qiáng)觀測(cè),注意是下沉均勻。3)、拆模的順序是:井孔模板→外側(cè)模板→刃腳斜面的支撐及模板。另外,制作第一節(jié)的豎筋時(shí),每條豎筋間隔高出第一節(jié)沉井標(biāo)高30cm、20cm,留與制作第二節(jié)沉井時(shí)豎筋的綁扎或焊接,以提高兩節(jié)沉井的結(jié)合度?;炷翍?yīng)一次連續(xù)澆完。先將制好的焊有錨固鋼筋的刃腳踏面擺放在碎石砂墊層的刃腳畫線位置,進(jìn)行焊接后再布設(shè)刃腳鋼筋、內(nèi)壁縱橫筋、外壁縱橫筋,內(nèi)外側(cè)箍筋設(shè)置保護(hù)層墊塊。沉井的外側(cè)模板采用豎縫支立,立好后嚴(yán)格核對(duì)上下口各部分尺寸、井壁的垂直度。(2)在夯實(shí)的砂墊層上鋪設(shè)枕木。(3)平整場(chǎng)地,接通水電。第一章、編制說明(一)、編制依據(jù):湖州市城市規(guī)劃設(shè)計(jì)研究院《江蔣漾路工程施工設(shè)計(jì)圖紙》以及現(xiàn)場(chǎng)情況,在嚴(yán)格遵守有關(guān)技術(shù)規(guī)范的前提下,結(jié)合本公司施工經(jīng)驗(yàn),《給水排水管道工程施工及驗(yàn)收規(guī)范》(GB502682008)(二)、編制原則按項(xiàng)目法施工原則進(jìn)行管理和施工,嚴(yán)格執(zhí)行有關(guān)的施工規(guī)范和驗(yàn)收規(guī)范,按設(shè)計(jì)圖紙施工。采用DN25鍍鋅水管接到工作井,水管埋入地下20cm;用電布置如下:設(shè)置總電箱,將建設(shè)單位提供的電源接到總電箱,由總電纜線接出各電箱到工作井位置,然后按國際《建設(shè)工程施工現(xiàn)場(chǎng)供用電安全規(guī)范》要求,對(duì)施工現(xiàn)場(chǎng)的電氣設(shè)備均采用具有重復(fù)接地的專用保護(hù)零線的五線制,在場(chǎng)內(nèi)分別布置動(dòng)力、照明等線路。枕木的數(shù)量根據(jù)沉井的重量和地基及砂墊層的容許承載力計(jì)算確定,間距為50cm。支撐拉桿完成后必須檢查是否牢固。鋼筋綁扎要結(jié)實(shí),井壁的內(nèi)外層鋼筋之間要設(shè)定位撐,在鋼筋綁扎后,采用同級(jí)配砂漿墊塊,控制保護(hù)層,保證鋼筋在砼中有效截面。4)在澆筑過程中,應(yīng)加強(qiáng)沉井平面高差、下沉量的觀測(cè),隨著砼澆筑總量的增大,測(cè)量密度相應(yīng)增大,如出現(xiàn)意外情況應(yīng)采取相應(yīng)措施確保沉井施工安全。第二節(jié)沉井澆筑前,在已硬化的接口處的混凝土表面上,清除水泥薄膜約(1mm)和松動(dòng)石子以及較弱混凝土層,并加以充分濕潤和沖洗干凈,且不得積水;在澆筑混凝土前,先在施工縫處鋪一層水泥漿或與混凝土內(nèi)成分相同的厚15~25mm 水泥砂漿,或先鋪一層減半石子混凝土,在正式繼續(xù)澆筑混凝土,并細(xì)致?lián)v實(shí),使新舊混凝土緊密結(jié)合。拆除刃腳下的支撐應(yīng)對(duì)稱依次進(jìn)行。一般情況,當(dāng)抽出墊木的2/3這一階段時(shí),沉井下沉比較均勻,下沉量也不大,回填時(shí)間亦較充分,便于較好抽墊和回填。(3)、井點(diǎn)管的埋設(shè):根據(jù)地質(zhì)情況、場(chǎng)地和施工條件,本工程井點(diǎn)降水井點(diǎn)管的安裝,采用高壓水沖土體成孔安裝法。如真空度不夠,通常是由于管路漏氣,應(yīng)及時(shí)修好。從沉井中間開始逐漸挖向四周,然后沿沉井每23m一段,向刃腳方向逐層全面、對(duì)稱、均勻的開挖土層,每次挖去510cm,當(dāng)土層經(jīng)不住刃腳的擠壓而破裂,沉井便在自重作用下均勻破土下沉。使井底的水流匯集在濾鼓內(nèi),用泵排出。第四章、頂管施工工藝根據(jù)工程進(jìn)度計(jì)劃要求,本工程配備二臺(tái)泥水平衡機(jī)。(3)貯漿箱放置時(shí),連接進(jìn)水泵的貯藏箱應(yīng)低于連接排泥泵的貯藏箱,保證稀泥漿能及時(shí)循環(huán)。(8)在預(yù)留洞打22mm膨脹螺栓18個(gè),環(huán)向均布,套上止水橡膠圈,壓上鋼壓板,用螺母輕輕壓緊(頂管機(jī)通過后再壓緊)。(4)壓漿方法要以與頂進(jìn)同步注漿為主,補(bǔ)漿為付,在頂進(jìn)過程中,要經(jīng)常檢查各推進(jìn)段的漿液形成情況,還可以通過中斷間和主頂裝置的油壓值推算出各段的注漿減阻效果,從而及時(shí)加以改進(jìn)。添加石膏具有使泥漿保持其減磨擦效果持久的功能,同時(shí)有提高漿液的膠凝強(qiáng)度。(3)添加頂鐵,重復(fù)上述操作,直至安裝下一節(jié)管子為止。4)頂進(jìn)過程中,發(fā)現(xiàn)管前土方坍塌、后背傾斜,偏差過大或油泵壓力表指針驟增等情況,應(yīng)停止頂進(jìn),查明原因,排除故障后,再繼續(xù)頂進(jìn)。砼管接砂的槽口尺寸必須正確,光潔平整,無氣泡。(2)本工程的地下導(dǎo)向采用JDB激光經(jīng)緯儀,由一束紅色的激光直指機(jī)頭尾部的光靶,在頂進(jìn)的過程中,操作者隨時(shí)可以得到偏差值,保證頂管方向控制的精確度要求。主頂油缸和后座的安裝也要滿足牢固的要求,水平和垂直誤差小于10mm。此土壓力選定得當(dāng),可使正面土體處于良好平衡狀態(tài),要采取自動(dòng)控制和人工控制的手段,以保持最合適的刀盤轉(zhuǎn)速、頂進(jìn)速度、頂管頂推力、排水量等施工參數(shù)。(7)意外情況的處理措施:1)地質(zhì)發(fā)生很大變化,突然間變硬或變軟,這可以通過管道的泥水流量壓力表讀數(shù)和刀盤電流來判斷,如果突然變硬了,減慢頂進(jìn)速度;如果地質(zhì)太軟,加快頂進(jìn)。第五章、 施工進(jìn)度計(jì)劃及保證措施一
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