基礎(chǔ)施工組織土建施工方案

1、rojects for the country to great promotion and role model. Six, winning multiple awards, enterprises to establish a good brand image in 2012, the companys project management, work safety, science and technology innovation and cultural construction, won multiple awards, show a good corporate image, c

2、reating more powerful brand. Engineering management aspects, company a period engineering has get has 2012 degrees China power quality Engineering Award, 2012 degrees power engineering excellent survey, and excellent design first prize and 2012 degrees national quality engineering Silver, engineerin

3、g construction early established of high standard production, create national power industry quality engineering, striving for national quality engineering of construction target all achieved, showed that company infrastructure engineering management level get power peer and social of full recognize

4、d. Safety, the successful completion of the Olympic task, test the effectiveness of the production management system, XX company and national electricity regulatory Bureau was rated as Advanced units of the Olympic Games, showed that companies in the risk control and safety management quality have m

5、ade substantial improvements. Technology innovation aspects, company 600MW unit domestic DCS system of development and application project won XX power technology progress first prize, and 2007 degrees power industry technology progress first prize, hidden information management get national power i

6、ndustry enterprise innovation results third prize, while, company also won China power information benchmark enterprise title, show out company in technology innovation aspects huge of strength, and for Enterprise set up has do designed do strong of good image. Cultural construction, the company was

7、 awarded by the China enterprise culture improvement Association issued a enterprise culture construction in excellent title, the company in strengthening the basic culture construction, advance XX characteristics and culture of success creating has been . -Additional inventory does not increase inv

8、entory to zero after the repair. NOSA review more than three stars. 3% production costs and reduce rates, management cost reduction ratio 8%. FCM grade, and took the lead in the XX system location. Three, and 2013 focus work (a) to upgrade quality for purposes, insisted science development, full con

9、struction five type Enterprise insisted science development is requirements enterprise in development process in the, to right processing security, and reliability and economic sex of relationship, insisted go connotation and extension both of development of road, put to specific of practice among,

10、is requirements we to implementation science development views, construction five type Enterprise. Building five enterprise is the Shenhua Groups global strategic enterprise development requirements, the company faced an increasingly difficult market situation and huge pressure on the operation of t

11、heinevitable choice, is to realize the strategic goal of promoting enterprise development, are important measures to adhere to the scientific development and embodiment. Company levels personnel to further from strategy and global of height full awareness construction five type Enterprise on achieve

12、d enterprise and good and fast development, constantly upgrade sustainable development force strategy target of major meaning, accurate grasp construction five type Enterprise of deep connotation, seriously learning XX company construction five type Enterprise assessment standard and the implementat

13、ion rules, clear five type Enterprise construction of target planning, efforts put insisted science development of thought and construction five type Enterprise of initiatives throughout to the production business activities among, Correctly dealing with five enterprise all aspects of the constructi

14、on, and strive to achieve five types implementation, go hand in hand, harmony and unity. While, General employees especially levels leaders to further awareness to, construction five type Enterprise cannot only stay in slogan Shang, to will its eventually reflected in enterprise operation index of a

15、dvanced Shang, reflected in enterprise quality of upgrade Shang, reflected in resources, and environment and enterprise of coordination development Shang, so construction five type Enterprise must to from actual starting, must to took data talk, to from based work starts with, company internal to th

16、rough carried out created five type team of activities, to grass-roots team construction to promote Five enterprise construction. Meanwhile, the construction of five enterprise will carefully handle the relationship between cost and benefit, and handle well the relationship between speed and securit

17、y, maintaining all the business activities of low cost, high efficiency, maintain faster growth and better standards of production safety, up to speed, quality, efficiency and security, harmonization, to achieve effective and healthy development of the enterprise. (Ii) to economic for Center, insist

18、ed security development, best grasp production business work security is enterprise development of political lifeline, company production business work to to stable reliable of security situation for based, to economic for Center, from rammed security management based, improve equipment health level

19、 starts with, to in market marketing and coal mine coordination management aspects increased efforts, implementation fine of management way, constantly upgrade company production business management level, for full completed annual the production business task lay based. 1, strengthen safety managem

20、ent . Fair working environment; further standardize the management, improve the level of service, from a healthy diet, accommodation, property and other aspects to improve the quality of service, staff worries, meanwhile, actively carried out to practice and promote harmonious development as the the

21、me of the activities, to buildprojects for the country to great promotion and role model. Six, winning multiple awards, enterprises to establish a good brand image in 2012, the companys project management, work safety, science and technology innovation and cultural construction, won multiple awards,

22、 show a good corporate image, creating more powerful brand. Engineering management aspects, company a period engineering has get has 2012 degrees China power quality Engineering Award, 2012 degrees power engineering excellent survey, and excellent design first prize and 2012 degrees national quality

23、 engineering Silver, engineering construction early established of high standard production, create national power industry quality engineering, striving for national quality engineering of construction target all achieved, showed that company infrastructure engineering management level get power pe

24、er and social of full recognized. Safety, the successful completion of the Olympic task, test the effectiveness of the production management system, XX company and national electricity regulatory Bureau was rated as Advanced units of the Olympic Games, showed that companies in the risk control and s

25、afety management quality have made substantial improvements. Technology innovation aspects, company 600MW unit domestic DCS system of development and application project won XX power technology progress first prize, and 2007 degrees power industry technology progress first prize, hidden information

26、management get national power industry enterprise innovation results third prize, while, company also won China power information benchmark enterprise title, show out company in technology innovation aspects huge of strength, and for Enterprise set up has do designed do strong of good image. Cultura

27、l construction, the company was awarded by the China enterprise culture improvement Association issued a enterprise culture construction in excellent title, the company in strengthening the basic culture construction, advance XX characteristics and culture of success creating has been . -Additional

28、inventory does not increase inventory to zero after the repair. NOSA review more than three stars. 3% production costs and reduce rates, management cost reduction ratio 8%. FCM grade, and took the lead in the XX system location. Three, and 2013 focus work (a) to upgrade quality for purposes, insiste

29、d science development, full construction five type Enterprise insisted science development is requirements enterprise in development process in the, to right processing security, and reliability and economic sex of relationship, insisted go connotation and extension both of development of road, put

30、to specific of practice among, is requirements we to implementation science development views, construction five type Enterprise. Building five enterprise is the Shenhua Groups global strategic enterprise development requirements, the company faced an increasingly difficult market situation and huge

31、 pressure on the operation of theinevitable choice, is to realize the strategic goal of promoting enterprise development, are important measures to adhere to the scientific development and embodiment. Company levels personnel to further from strategy and global of height full awareness construction

32、five type Enterprise on achieved enterprise and good and fast development, constantly upgrade sustainable development force strategy target of major meaning, accurate grasp construction five type Enterprise of deep connotation, seriously learning XX company construction five type Enterprise assessme

33、nt standard and the implementation rules, clear five type Enterprise construction of target planning, efforts put insisted science development of thought and construction five type Enterprise of initiatives throughout to the production business activities among, Correctly dealing with five enterpris

34、e all aspects of the construction, and strive to achieve five types implementation, go hand in hand, harmony and unity. While, General employees especially levels leaders to further awareness to, construction five type Enterprise cannot only stay in slogan Shang, to will its eventually reflected in

35、enterprise operation index of advanced Shang, reflected in enterprise quality of upgrade Shang, reflected in resources, and environment and enterprise of coordination development Shang, so construction five type Enterprise must to from actual starting, must to took data talk, to from based work star

36、ts with, company internal to through carried out created five type team of activities, to grass-roots team construction to promote Five enterprise construction. Meanwhile, the construction of five enterprise will carefully handle the relationship between cost and benefit, and handle well the relatio

37、nship between speed and security, maintaining all the business activities of low cost, high efficiency, maintain faster growth and better standards of production safety, up to speed, quality, efficiency and security, harmonization, to achieve effective and healthy development of the enterprise. (Ii)

38、 to economic for Center, insisted security development, best grasp production business work security is enterprise development of political lifeline, company production business work to to stable reliable of security situation for based, to economic for Center, from rammed security management based,

39、 improve equipment health level starts with, to in market marketing and coal mine coordination management aspects increased efforts, implementation fine of management way, constantly upgrade company production business management level, for full completed annual the production business task lay base

40、d. 1, strengthen safety management . Fair working environment; further standardize the management, improve the level of service, from a healthy diet, accommodation, property and other aspects to improve the quality of service, staff worries, meanwhile, actively carried out to practice and promote ha

41、rmonious development as the theme of the activities, to build基礎(chǔ)施工組織-土建施工方案轉(zhuǎn)自:施工技術(shù)（）1.1前的技術(shù)準(zhǔn)備（1）施工圖紙審核1）施工圖等設(shè)計(jì)文件下達(dá)后，由技術(shù)負(fù)責(zé)人組織預(yù)算員、計(jì)劃員等各部門有關(guān)人員認(rèn)真閱讀設(shè)計(jì)文件和施工圖紙，領(lǐng)會(huì)、熟悉技術(shù)要求和圖紙內(nèi)容，審查設(shè)計(jì)文件和圖紙中可能存在的問題；2）核對(duì)施工圖、設(shè)計(jì)說明書及標(biāo)準(zhǔn)圖是否正確、完整；核對(duì)基礎(chǔ)坐標(biāo)、標(biāo)高是否與其它基礎(chǔ)圖一致；3）對(duì)圖紙中存在的問題詳細(xì)列出，交技術(shù)負(fù)責(zé)人歸納、匯總，并及時(shí)與設(shè)計(jì)人員聯(lián)系或在設(shè)計(jì)交底會(huì)上提出，以求得到設(shè)計(jì)部門的答復(fù)和解決，并做好圖紙匯

42、審記錄。（2）技術(shù)交底技術(shù)負(fù)責(zé)人根據(jù)工程進(jìn)展情況，組織詳細(xì)的技術(shù)交底。技術(shù)交底分三級(jí)進(jìn)行：第一級(jí)技術(shù)交底是由技術(shù)負(fù)責(zé)人向項(xiàng)目部各職能管理人員、工程隊(duì)技術(shù)負(fù)責(zé)人和主任進(jìn)行技術(shù)交底；第二級(jí)技術(shù)交底是由項(xiàng)目組（工程隊(duì)）技術(shù)負(fù)責(zé)人向本項(xiàng)目組系統(tǒng)內(nèi)的主任、段長、技術(shù)員及班長以上管理人員進(jìn)行技術(shù)交底；第三級(jí)技術(shù)交底是由技術(shù)員、段長向施工人進(jìn)行技術(shù)交底。1）施工組織設(shè)計(jì)質(zhì)量計(jì)劃的技術(shù)交底技術(shù)負(fù)責(zé)人向各職能部門相關(guān)人員進(jìn)行交底并形成技術(shù)交底記錄。2）施工方案技術(shù)交底由技術(shù)管理責(zé)任工程師向技術(shù)員、段長、檢查員、施工隊(duì)隊(duì)長、班組長進(jìn)行交底，并填寫技術(shù)交底記錄。3）分部分項(xiàng)工程技術(shù)交底由技術(shù)員、段長向操作人員進(jìn)行技

43、術(shù)交底，并填寫技術(shù)交底記錄。1.2施工順序 定位放線 土方開挖地基驗(yàn)槽（坑）基礎(chǔ)底級(jí)配碎石回填基礎(chǔ)墊層模 基礎(chǔ)墊層混凝土澆注基礎(chǔ)鋼筋綁扎基礎(chǔ)模板基礎(chǔ)混凝土澆注回填土1.3施工方法（1）定位放線基槽定位由公司測量隊(duì)用紅外線全站儀定位，根據(jù)甲方提供的方格網(wǎng)或施工其他控制點(diǎn)測定挖土范圍線，并在挖土線外11.5m處設(shè)龍門樁，并做警戒標(biāo)記；施工期間，嚴(yán)禁車輛及人為因素?fù)p壞龍門樁，此樁在施工期間做為建（構(gòu)）筑物軸線標(biāo)高、測量及復(fù)核的依據(jù)。（2）土方開挖1）施工方法A做好挖土前地表排水溝及排水系統(tǒng)工作；當(dāng)有地下水時(shí)，還應(yīng)采取相應(yīng)的排水措施。B地下水的排放主要采用集水坑集中排水的方法，在基坑的一角或兩邊設(shè)置集

44、水坑，坑截面尺寸10001000mm比基坑底標(biāo)高深1米。基坑四周設(shè)導(dǎo)水溝，連入集水坑，基坑上設(shè)磚砌沉淀池，水用污水泵由集水坑排入沉淀池，將水沉淀后，再導(dǎo)入水排系統(tǒng)。C土方采用機(jī)械或人工開挖的方法；對(duì)于樁基礎(chǔ)及小型基礎(chǔ)等，采用人工開挖的方法，對(duì)于坑池等較大的基礎(chǔ)則采用機(jī)械開挖的方法進(jìn)行。D土方開挖時(shí)按放線員所撒開挖邊線進(jìn)行挖方作業(yè)，開挖邊線由基礎(chǔ)墊層（加深層）范圍、工作面（每邊500 mm）、放坡增加寬度等共同組成。對(duì)于破碎后的砼塊等建筑垃圾及時(shí)運(yùn)離，不可在作業(yè)區(qū)堆放。土方開挖應(yīng)按設(shè)計(jì)要求1：0.751：0.9系數(shù)進(jìn)行放坡，并采取措施確保邊坡的穩(wěn)定；E施工機(jī)械進(jìn)入現(xiàn)場要經(jīng)過的道路應(yīng)做好必要的加固

45、工作；F機(jī)械挖土應(yīng)在基底標(biāo)高以上保留1030cm左右用人工清底； G土方開挖完畢后應(yīng)進(jìn)行基槽清底，并及時(shí)進(jìn)行下一道工序的施工；2）質(zhì)量檢驗(yàn)標(biāo)準(zhǔn)項(xiàng)目序號(hào)項(xiàng) 目允許偏差或允許值（）檢驗(yàn)方法基坑基槽挖方場地平 整地面基層主控項(xiàng)目1標(biāo)高-5030-50水準(zhǔn)儀2長度、寬度（由設(shè)計(jì)中心向兩邊量）+200-50+300-100+100用鋼尺量3邊坡設(shè)計(jì)要求觀察一般項(xiàng)目1表面平整度202020用2米靠尺和楔形塞尺檢查2基底土性設(shè)計(jì)要求觀察3）土方開挖注意事項(xiàng)A 施工現(xiàn)場的電線應(yīng)架空、拉設(shè)應(yīng)合理，不得妨礙土方開挖；B基槽開挖應(yīng)有水平標(biāo)準(zhǔn)嚴(yán)格控制基底標(biāo)高，標(biāo)樁間的距離宜3 m，以防基底超挖；C對(duì)定位樁和水準(zhǔn)點(diǎn)等應(yīng)

46、注意保護(hù)好，挖土?xí)r不得碰撞，并應(yīng)定期復(fù)測，檢查其可靠性。4）基底清理挖土施工完后，即可進(jìn)行人工清理基槽與基礎(chǔ)施工，人工清理基槽包括：基槽邊坡和基底?；鄣撞?030cm厚的土層在基礎(chǔ)施工前12天挖出，以免地基的承載力減少或受凍而達(dá)不到設(shè)計(jì)要求。5）驗(yàn)槽基槽清理完后，由監(jiān)理、甲方代表、設(shè)計(jì)代表、施工四方對(duì)基槽的標(biāo)高、平面位置及尺寸、地基承載力驗(yàn)收合格簽字后方可進(jìn)行后續(xù)工程的施工。（3）回填土 1）施工方法A選用裝載機(jī)裝土、自卸汽車運(yùn)土的方式進(jìn)行回填運(yùn)輸；B自卸汽車用的土應(yīng)堆到基槽邊，再由小推車倒運(yùn)到回填部位；C回填土應(yīng)分層回填，每層虛鋪厚度不應(yīng)大于250mm；D在回填標(biāo)高不同的地段時(shí)應(yīng)留設(shè)成階梯

47、形，每層應(yīng)相互搭接，其搭接長度應(yīng)不少于每層填土厚度的兩倍，上下層錯(cuò)縫距離不應(yīng)小于1000mm；E回填時(shí)每層均應(yīng)按要求做干密度試驗(yàn)，待該層干密度符合設(shè)計(jì)及規(guī)范要求后再填上一層回填土；2）施工要求A在回填土施工過程中應(yīng)確保回填土質(zhì)量符合要求；B辦理驗(yàn)槽手續(xù)，填土基底已按設(shè)計(jì)要求完成或處理好；C地下基礎(chǔ)和其他專業(yè)工程已進(jìn)行檢查并辦好隱蔽驗(yàn)收手續(xù)，且結(jié)構(gòu)已達(dá)到規(guī)定強(qiáng)度；D填土前應(yīng)做好水平高程的測設(shè)：在坡邊上按需要的間距打入水平樁；E提前對(duì)填土進(jìn)行試驗(yàn)，確定其最優(yōu)含水率和現(xiàn)場控制干密度；F由于基底標(biāo)高不一致，應(yīng)將基底挖成階梯形，階寬不小于1米；G回填土應(yīng)分層找平夯實(shí)，分層厚度和壓實(shí)遍數(shù)應(yīng)根據(jù)土質(zhì)、壓實(shí)系

48、數(shù)和機(jī)具性能選用；H分段分層填土，交接處應(yīng)填成階梯形，每層相互搭接，其搭接長度不應(yīng)小于每層填土厚度的兩倍，上下層錯(cuò)縫距離不小于1米；I回填土采用人工平攤、機(jī)械夯實(shí)的施工方法；每層壓實(shí)后均應(yīng)用環(huán)刀按規(guī)定取樣進(jìn)行干密度試驗(yàn)，該層合格后才能施工上一層。3）回填土施工注意事項(xiàng)A嚴(yán)格控制每層回填厚度，禁止汽車直接卸土入槽；B施工時(shí)應(yīng)注意保護(hù)有關(guān)軸線和標(biāo)高高程樁點(diǎn)，防止碰撞下沉；C回填土應(yīng)分層對(duì)稱夯填，防止造成不平衡的一側(cè)壓力而破壞基礎(chǔ)，已完成的回填土應(yīng)及時(shí)將表面壓實(shí)。4）回填土質(zhì)量檢驗(yàn)標(biāo)準(zhǔn)項(xiàng)目序號(hào)項(xiàng)目允許偏差或允許值（）檢驗(yàn)方法基坑基槽場地平整地面基層主控項(xiàng)目1標(biāo)高-5030-50水準(zhǔn)儀2分層壓實(shí)系數(shù)設(shè)

49、計(jì)要求環(huán)刀法一般項(xiàng)目1表面平整度202020用2米靠尺和楔形塞尺檢查2回填土料設(shè)計(jì)要求直觀鑒定3分層厚度及含水量設(shè)計(jì)要求水準(zhǔn)儀及抽樣檢查1.4獨(dú)立基礎(chǔ)工程施工基礎(chǔ)施工時(shí)，應(yīng)遵循先深基礎(chǔ)后淺基礎(chǔ)的原則進(jìn)行。（1）施工方法： 1）定位放線由放線人員根據(jù)龍門樁對(duì)基礎(chǔ)彈出墨線，施工前，首先澆筑混凝土墊層。然后在墊層上應(yīng)彈出十字中線，柱子插筋邊線，基礎(chǔ)邊線及各臺(tái)子的邊線，并用紅油漆作三角形標(biāo)記，模板支完后，再用水準(zhǔn)儀操平，給出基礎(chǔ)各臺(tái)子的標(biāo)高。并用紅油漆作標(biāo)記，作為澆筑混凝土?xí)r的控制標(biāo)高。2）模板工程A本工程采用定型組合鋼模板；B模板拼裝時(shí)應(yīng)接縫嚴(yán)密，接縫寬度符合規(guī)定；C模板與混凝土接觸面應(yīng)清理干凈并涂

50、刷隔離劑；D根據(jù)設(shè)計(jì)尺寸，首先由施工技術(shù)負(fù)責(zé)人畫出配板圖、加固圖。E模板施工前，清理干凈其表面砂漿，并刷好隔離劑。F根據(jù)基礎(chǔ)墨線釘好壓腳板，用U型卡或聯(lián)接銷子把定型模板扣緊固定，板縫的縫隙、模板用腳手桿進(jìn)行加固必須符合規(guī)范的要求，以免混凝土澆筑過程中模板移位、跑模。G安裝四周龍骨及支撐，并將鋼筋位置固定好，復(fù)核無誤。3）鋼筋工程A鋼筋的品種、質(zhì)量，焊條、焊劑的牌號(hào)應(yīng)符合設(shè)計(jì)要求。B鋼筋表面應(yīng)清潔，規(guī)格、形狀、尺寸、數(shù)量、間距、錨固長度、接頭位置應(yīng)符合設(shè)計(jì)和施工規(guī)范的要求。C鋼筋網(wǎng)片、骨架的綁扎和焊接質(zhì)量應(yīng)符合施工規(guī)范要求；D彎鉤朝向正確，綁扎接頭位置及搭接長度，箍筋的數(shù)量、彎鉤角度和平直長度應(yīng)

51、符合規(guī)范要求；E鋼筋的焊點(diǎn)、接頭尺寸和外觀質(zhì)量符合規(guī)范要求。F根據(jù)施工圖紙，首先進(jìn)行鋼筋下料加工，然后再進(jìn)行綁扎，對(duì)于柱子插筋，要搭設(shè)臨時(shí)支架固定，以免澆筑混凝土?xí)r鋼筋移位。G當(dāng)基礎(chǔ)柱截面內(nèi)每邊縱向鋼筋根數(shù)不多于4根時(shí)，插筋與柱內(nèi)所有縱向鋼筋綁扎接頭可在同一截面上，58根，可在兩個(gè)截面上搭接。912根時(shí)，在三個(gè)截面上搭接，基礎(chǔ)底層的鋼筋用50mm50mm35mm的砂漿墊付塊墊起綁牢，保證基礎(chǔ)底層鋼筋的保護(hù)層厚度。H鋼筋網(wǎng)的綁扎，四周兩行交叉點(diǎn)應(yīng)每點(diǎn)扎牢，中間部分每根相互成梅花式扎牢，雙向主筋的鋼筋，必須將全部鋼筋相互交點(diǎn)扎牢。4）混凝土工程A上道工序驗(yàn)收合格后，方可進(jìn)行基礎(chǔ)混凝土施工。B配制的

52、混凝土材料必須有材料合格證書并經(jīng)有關(guān)部門檢驗(yàn)合格； C混凝土澆筑時(shí)應(yīng)一次連續(xù)澆筑完，并確保在下層混凝土初凝前將上層混凝土澆筑完畢；D澆筑混凝土?xí)r用插入式振動(dòng)器振搗要密實(shí)，確保施工的基礎(chǔ)里實(shí)外光，按規(guī)定做好試塊并按期送壓。E澆筑完畢后，應(yīng)及時(shí)進(jìn)行養(yǎng)護(hù)。5）預(yù)埋工程：A基礎(chǔ)上的預(yù)埋鐵件及預(yù)埋螺栓嚴(yán)格按圖紙的要求進(jìn)行加工和制作，并有相應(yīng)的合格證明后才可用于工程中；B預(yù)埋鐵件及預(yù)埋螺栓安裝時(shí)要按照?qǐng)D紙的要求位置，標(biāo)高進(jìn)行，對(duì)于一般的小型鐵件及直徑小于20的地腳螺栓采取和基礎(chǔ)一起用腳手桿固定的方法，對(duì)于較大直徑螺栓及大型埋件，應(yīng)用支架單獨(dú)進(jìn)行固定，螺栓應(yīng)制作定位模板進(jìn)行定位，以確保其準(zhǔn)確性。C澆筑混凝土

53、前應(yīng)檢查其允許偏差及固定情況，滿足要求并請(qǐng)有關(guān)部分確認(rèn)后，用布料或塑料布進(jìn)行包裹，螺栓外露部分包裹前要涂抹黃油，用以保護(hù)絲扣及表面不被損壞及污染。1.5設(shè)備基礎(chǔ)施工（1）鋼筋砼設(shè)備基礎(chǔ)：1）設(shè)備基礎(chǔ)施工先在砼墊層或底板上放出基礎(chǔ)線和外形線，復(fù)核后有鋼筋的開始綁扎鋼筋，無鋼筋的或鋼筋已綁扎好的進(jìn)行模板安裝，2）基礎(chǔ)鋼筋設(shè)上、下兩層網(wǎng)片時(shí)，上層鋼筋網(wǎng)片的定位可用鋼筋、型鋼制作的“鐵馬”或混凝土墩支持。3）方形基礎(chǔ)按常規(guī)支模，圓形基礎(chǔ)模板采用100mm寬定型鋼模板拼安，并用鋼腳手桿、鋼筋等連接支撐牢固。4）設(shè)備基礎(chǔ)的施工縫通常留在變截面處，或結(jié)構(gòu)受剪力較小且便于施工的部位。垂直施工縫的留置應(yīng)與設(shè)計(jì)人

54、員研究決定。5）承受動(dòng)力作用的設(shè)備基礎(chǔ)（反應(yīng)器基礎(chǔ)等）不宜留置施工縫，如必須留置時(shí)，應(yīng)取得設(shè)計(jì)單位的同意。6）施工縫處的混凝土表面應(yīng)鑿毛，并清除軟弱混凝土。在繼續(xù)澆筑混凝土前，應(yīng)用水沖洗平干凈、濕潤后在表面先鋪澆3050毫米厚與混凝土成分相同的水泥砂漿或減半石混凝土。7）對(duì)于大體積承臺(tái)基礎(chǔ)混凝土，應(yīng)采取有效措施防止溫度應(yīng)力引起裂縫。（2）預(yù)埋工程1）地腳螺栓與螺母必須配套加工，配合使用，松緊合適，沒有亂扣、缺絲、裂紋等缺陷。2）設(shè)備基礎(chǔ)的預(yù)埋地腳螺栓，應(yīng)采用定位模板固定。定位模板宜用鋼板、型鋼、鋼管、鋼筋等焊接制成，應(yīng)有足夠的強(qiáng)度和剛度。3）定位模板的設(shè)置應(yīng)使螺栓固定后沒有任何擺動(dòng)的自由度。特

55、殊設(shè)備基礎(chǔ)，如反應(yīng)器基礎(chǔ)宜采用雙層定位模板，兩個(gè)反應(yīng)器基礎(chǔ)定位模板現(xiàn)場制作一個(gè)，基礎(chǔ)先后施工定位模板周轉(zhuǎn)使用，一般設(shè)備基礎(chǔ)宜采用單層定位模板。4）預(yù)埋件在安裝前，應(yīng)對(duì)鋼板及錨固鋼筋的規(guī)格、數(shù)量、尺寸和焊接質(zhì)量進(jìn)行檢查，大型預(yù)埋件還應(yīng)進(jìn)行調(diào)平。5）在基礎(chǔ)頂面安裝預(yù)埋件，應(yīng)在混凝土澆筑完畢，頂面抹平拍實(shí)之后進(jìn)行。預(yù)埋件的錨筋應(yīng)為螺紋鋼筋。6）預(yù)埋件安放時(shí)表面應(yīng)保持平整，鋼板表面露出混凝土面或砂漿抹面層25mm。7）預(yù)留洞：按照設(shè)計(jì)尺寸先配制木模芯，再在模芯外包一層26#鍍鋅鐵皮。在基礎(chǔ)模板支設(shè)畢后，用腳手桿進(jìn)行預(yù)留洞模芯的加固，用鐵絲將模芯回定在腳手桿上。模芯在混凝土澆完畢后在混凝土終凝以前拔出。8）二次灌漿A灌漿前，應(yīng)清除預(yù)留孔中的雜物、積水。B灌漿處的基礎(chǔ)表面應(yīng)在設(shè)備安裝前鑿成麻面，在100100mm面積內(nèi)有35個(gè)麻點(diǎn)為宜；也可在基礎(chǔ)混凝土初凝時(shí)，對(duì)表面進(jìn)行拉毛處理。C地腳螺栓預(yù)留孔的灌漿工作；必須