余热锅炉基础专项施工方案.pdf

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1、余热锅炉房基础专项施工方案余热锅炉房基础专项施工方案Construction Scheme of HRSG Hall FoundationConstruction Scheme of HRSG Hall Foundation编制依据及说明编制依据及说明Compilation Basis and DescriptionCompilation Basis and Description1.1 编制依据 Compilation basis余热锅炉房基础施工图 F681ST030307；图纸会审记录；电力建设施工质量验收及评定规程 第 1 部分：土建工程 DLT 5210。1-2005建筑地基基础工程

2、施工质量验收规范 GB502022002混凝土结构工程施工质量验收规范 GB5020420021。1Compilation basis“Construction Drawings of HRSG Foundation Hall F681ST030307;“Record of Countersign of Drawings”；“Quality Acceptance and Valuation Code of Electric Power Construction,Section 1,CivilWork Part”GB502022002“Quality Acceptance Specificati

3、on of Building Sub grade and Foundation Work”GB502022002“Quality Acceptance Specification of Concrete Structure Work”GB5020420021.2 编制说明1.2 Description 1#、2#、3余热锅炉基础总体布局相同，结构形式一样，功能也相近，故3 个机组基础施工同时考虑，编写在同一方案中;The general plan layouts of 1#、2#and 3 HRSG foundations are the same，as well asthe structur

4、es and functions。So three HRSG foundations work will be considered intoone construction scheme.余热锅炉基础包括垫层、基础承台、连系梁、短柱等几部分,本方案同时考虑,不另行编制方案;The HRSG foundation covers bedding course,foundation cushion cap,collecting beamsand short columns etc which will be compiled in this scheme.基础与上部框架采用螺栓连接，螺栓及固定架由

5、厂家提供；Adopt Bolts connecting on the foundation and top frames,the bolts and fixed frames willbe supplied by manufacturer。地基处理采用钢筋砼灌注桩,该部分已由打桩公司完成，基础土石方开挖已在工程桩交接前基本完成，本方案中均不再赘述。The reinforced concrete caisson pile is used for sub-grade treatment.This job has beenfinished by pile driving company,As ear

6、th and stone excavation of the foundation hasbeen basically completed before pile driving,so there is no other instruction about it inthis scheme again。2 2工程概况工程概况 Summary of WorkSummary of Work余热锅炉露天布置，分为 1#、2、3#基础，分别布置于燃机房区域轴线 B1413、B98、B43，横向 12.8m，纵向 47。4m。锅炉基础轴线间相距 48。5m。The outdoor arrangement

7、 of HRSG is separated by three parts，1#，2 and foundations，respectively set on the axis lineB-1413、B-98 and B-43of GT hall area.The lateral length is 12.8m,longitudinal length is 47。5.Thespace between HRSG foundation axis lines is 48。5m.余热锅炉基础，承台型除了 CT5、CT-6 为大体积基础，CT-1CT4 为 14 个桩基基础，其余均为独立基础 19 个。基础

8、间采用连系梁连成整体。基础承台底标高-4.0m.The cushion cap is CT-5 and CT6 as big volume foundation，beside thatfrom CT1 to CT4 total quantity of piling foundations is 14，others are isolatedfoundations with 19 of the quantity.It is linked as a whole body by collar beamsamong foundations.The bottom elevation of foundati

9、on cushion cap is-4.0m。基础与上部框架采用螺栓连接,螺栓埋入基础短柱内。基础砼强度等级，垫层 C10素混凝土,承台及连系梁 C30，基础柱段采用C40.砼保护层基础 50mm，基础梁30mm，其余部位 30mm。钢筋级为 HPB235，级为 HRB335。The foundation and top frames are connected by bolts which are embedded infoundation short column.The strength grade of concrete is as following:C10plain concret

10、e is used for bedding course，C30 for cushion cap and connectingbeams,C40 for foundation column section.The protective layer of concrete,foundation girder and other places respectively are 50mm，30mm and 30mm.Steelreinforcement grade is HP235，and grade is HRB335.施工程序施工程序 Construction Procedure.Constru

11、ction Procedure.根据总体进度计划安排，余热锅炉基础施工顺序,总体先施工 3余热锅炉基础，依次再进行 2、1#锅炉基础.1#、2、3#施工时可并行、交叉进行。According to the overall progress scheme of construction，The constructionof HRSG foundation sequence is under hereby：Firstly construction for 3 HRSGfoundation in generally,the following step is construction of 2、1

12、HRSGfoundation。Theconstructionofthesefoundationscanbeprocessedalternatively and parallelly.余热锅炉基础分三块区域施工，H6H1.3 轴间桩基基础及系梁为第一区域，CT-5、CT-6 大体积基础为第二区域，H1.3 轴以南的独立基础为第三区域。It is divided in to 3 areas for HRSG foundation construction。The pilefoundation and conneting beam from axis line H6 to H1.3 is regar

13、ded as firstarea,the second area is large volume concrete foundation for CT5 and CT6,the third area is isolated foundation in south position of axis line H1.3。锅炉基础施工程序为：地基验槽垫层支模垫层浇筑 C10承台(或系梁）钢筋绑扎支模验收浇砼 C30养护拆模回填施工缝处理螺栓施工短柱钢筋绑扎支模浇筑砼 C40养护拆模回填The HRSG foundation construction sequence is as following:

14、Inspection offoundation subsoil Formwork supporting for bedding course C10 Concretepouring for bedding course steel bar binding for cushion cap（or connetingbeam)support formwork inspection and acceptance C30 Concrete pouring curingdemolitionofformworkbackfillingtreatmentofconstruction joints Screw b

15、olts working steel bar biding for short column support formworks C40 concrete pouring curing removal of formwork backfilling.3 3主要分项工程施工方法主要分项工程施工方法3.Main Construction Methods of Subsection Work3.Main Construction Methods of Subsection Work1、测量放线1.Survey and setting out1.1 主要仪器：水准仪、RTS-632 全站仪、50m 钢

16、卷尺。1。1 Main Instruments:Level gauge，RTS-632 total station and 50m steel measuringtape。1.2 根据现场原始定位点及锅炉平面布置图，选择合适位置设置控制点,每次定位防线前对控制点进行复核。1.2 Select proper location to set control point according to site originalposition and plan layout of HRSG，recheck the control point prior to locatingand setting ou

17、t。1。3 工作流程1.3 Work Flow:轴线用极坐标法测设。C10 素砼垫层施工后，用全站仪从控制点引出，定出基础轴线，并在轴线两端及交叉点用红油漆进行标注。根据轴线确定基础承台、短柱及连系梁边框线.Survey and set out the axis line by Polar Coordinate Methods。After finishingC10 plain concreting for bedding course,set the foundation axis line by totalstation from control point and mark the end

18、s of axis line and cross point withred paint。The frame lines of foundation cushion cap,short column and connetingbeam can be confirmed according to axis line。高程用水准仪测量,从控制点引出，先确定出垫层底标高；模板支设加固完成后，在模板四角划出标高线，并用红油漆标识。Measure the elevation by level gauge；first confirm the elevation of beddingcourse leadi

19、ng from control point;The elevation line can be marked on the fourcorners of formworks and marked with red paint after completion formworksupporting2、钢筋工程2。Steel Reinforcement Work。2。1 原材料2.1 Raw Materials：本工程所用钢筋均采用大厂的钢材,经监理工程师现场见证取样进行复检,经试验合格后方可使用.All of steel bars used in this project should be m

20、anufactured by large steelplant and final determinationis depended onthe engineers approval aftermaterial sampling and qualification of inspection.2。2 钢筋加工：2.2 Machining of Reinforcement bar在钢筋加工场地集中下料，统一配制。配制好的钢筋按进行码垛、保护，使用拖拉机运至锅炉现场绑扎.Unload steel reinforcement in the machining work shop and distri

21、bute themwell。Stacking etc。protective measures must be taken after distribution ofsteel bars，and then use tractors deliver to HRSG site area for assembling。严格按照设计图纸及钢筋配料单进行加工成型，其规格、尺寸、质量应满足设计图纸要求.Strictly follow the design drawing and steel bar distribution sheet tomachine them.The specification，dim

22、ension and quality should conform to therequirements of design drawings。2.3 钢筋绑扎2。3 Steel Bar Assembling基础钢筋网绑扎时，四周两行钢筋交叉点应每点扎牢,中间部分的交叉点可相隔交错扎牢，但必须保证受力钢筋不位移。绑扎时注意相邻绑扎点的丝扣要成八字形，以免网片歪斜变形。The cross section point of two rows steel bars must be tightened well whenassemble steel bars，the cross section poi

23、nt can be fixed staggeringly，however,nonmovement of stressed reinforcement must be warranted。Takenotice that thread connection in adjacent of the assembling point shouldbe splay shaped to avoid distortion of mesh while assembling meshreinforcement。梁箍筋弯钩应错开绑扎,并保证转角处钢筋绑扎到位.The stirrup hooks for the be

24、ams should be assembled staggeringly to makesure the assembling of steel bar on cornerin correct place插筋位置必须准确，采用钢筋井字架定位柱筋，利用承台面钢管双向固定柱插筋，以免造成保护层超标。The position of steel dowel must be accurate,the groined steel frame isadopted to locate column reinforcement，use steel pipes on the surface ofcushion c

25、ap to fix column steel dowel in two directions to prevent fromexceeding protective layer standard index。钢筋保护层采用水泥砂浆垫块，同一型号垫块加工厚薄应一致.The concrete mortar block is adopted for steel reinforcement protectivelayer，the thickness of same type block should be in correspondence3、模板工程：3.Formworks3。1 基础选择胶合木模、

26、方木、三形夹、对拉螺杆及钢管连接、固定支撑.3。1 Plywood，wood blocks,trimorphic clamps,pull bolts,steel pipes and fixedstays are selected for foundation。3.2 承台支模时，先拼每面模板，钻出螺杆孔，再合上对角两面模板,穿对拉螺杆，再封另两面模板,在基础模板外四周设钢管横楞、竖楞及斜向支撑进行初步加固、拉线、调直，加固。3.2 When support the formworks of cushion cap,first assemble each piece offormwork tog

27、ether，drill the bolts holes on the formworks,then piece on theformworks on the two diagonal planes,insert pull bolts,then close the formworksin other two planes。Preliminary fixing，wire pulling,straightening and fixingto lateral and longitudinal square blocks and diagonal bracing should be doneall ar

28、ound foundation formworks。3。3 梁模板支设:先搭设梁底承重架，铺上底模，再封单面模板，钻出螺杆孔，穿好螺杆，螺杆外套 PVC 管，封另一侧模板，设钢管横楞、竖楞，拉线调直并加固。3.3 Supporting of beam formworks：First set up bearing frame of bottom beam，put on the bottom formworks，then close oddside board,drill hole on the boardand insert bolt which has PVC sleeve on it，clo

29、se the formworks on the otherside,after set up lateral and longitudinal square blocks，the job of wirepulling,straightening and fixing can be started。3。4 短柱模板支设：按短柱位置线，先立对角面模板，再穿对拉螺杆,接着封另两面模板，调直加固。3.4 Supporting of short column formwork:set up diagonal side formworks accordingthe location line of sho

30、rt column，then insert pull bolts and close the othertwo side formworks3.5 支模螺杆设置:基础承台高度达 1.5m,竖向设置 3 道螺杆，横向每隔 60cm 设置一道。短柱横向设置两道螺杆，竖向底部上 15cm 一道，向上每隔 60cm 设置一道。3。5 Setting of support-formwork bolts:when the elevation of cushion cap approach1.5m,in longitudinal direction set 3 rows of bolts,in cross

31、direction the boltsshould be set row by row within space of 60cm.For the short column formworks,the bolts shall be set in 2 rows，1 row is on 15cm bottom position in longitudinaldirection，and another is set row by row within space of 60cm.3.6 承台及梁顶部两侧模板用钢管对拉时，钢管必须高出承台不少于 100mm,以便于抹面，确保砼表面平整、光洁。3。6 Wh

32、ile pulling with steel pipe to two sides of formworks for cushion capand top of beam，the elevation of steel pipe must not less than 100mm of cushioncap elevation to ensure better finishing,smoothing and cleaning of concretesurface.3。7 模板验收合格后，在模板地脚用砂浆嵌缝，防止基础砼出现烂根现象。3.7 After the qualification of for

33、mwork checking and acceptance，fill the jointon the bottom of formworks with mortar to guard against any foundation concreterot phenomenon happening。3。8 模板拆除后，将对拉螺杆垫块凿除，螺杆割断，用同级配的水泥砂浆补孔.3。8 Remove the cushion block of pulling bolts and cut the bolts，after demolitionof formworks。Fill the bolts opening

34、 on the formwork with same graded concretemortar。4、螺栓工程4.Bolts Work4.1 安装程序：焊角钢立杆测出横杆标高线焊横杆焊斜撑加固在横杆上放出基础螺栓十字线在钢板上画出螺栓十字线-将钢板放在固定架横杆上校正，使两十字线重合，焊牢对准钢板上的螺栓孔安装好螺栓转动螺母调整螺栓顶标高验收4。1 Erection procedure：Weld angle steel poling-Survey the elevation of crossbar weld cross bar-weld inclined piece set cross cur

35、ve of foundation boltson cross bar mark cross curve of bolts on the steel slab put the steel slabon fixed cross bar to have alignment,make those two cross curve coincide andweld them stably Insert bolts into the openings on the slab screw the nutsto adjust bolts approach top elevation check and acce

36、ptance。4.2 螺栓固定架焊接牢固、稳定,保证砼浇筑时螺栓不发生偏移。4。2 fixed supports of bolts shall be welded tightenedly and stably to warrantnonshifting of bolts during concrete pouring.4。3 短柱浇筑完成对露出部分进行保护，具体做法：先用黄油均匀涂刷螺栓头，再套上 PVC 管,短柱四角用角钢框罩住，框高出 PVC 管 5cm 左右。4。3 Some protective measures shall be taken for the exposed part

37、of short column,the detailed action is as following:brush the head of bolts well distributedwith grease，then put PVC sleeve on it，the four corners of short columns shouldbe covered by angle steel frame which is higher 5cm than PVC sleeve.5、混凝土工程5、Concrete Work5。1 砼采用集中搅拌、砼运输车运输，泵送入模施工工艺.5。1 Construc

38、tion procedure is concentrated concrete blending in the mixingstation,delivery by concrete conveyer and pumping concrete into formworks5.2 采用斜面分层赶浆法施工,一次性浇筑完成。基础短柱砼浇注先行淘浆，以保证底部不出现烂根、蜂窝、麻面等。5.2 One-time concrete pouring and concrete flattening layer by layer on inclinedplane methods are adopted in th

39、is scheme。Firstly finish the job of filteringconcrete slurry for short column foundation to prevent from rotting,voids andpits5.3 砼浇筑分层厚度控制在 300500mm，振动棒振捣上一层时,应插入下层 50mm，以消除层间接缝。插点采用行列式间距 400mm，以混凝土表面不再显著下沉、不再出现气泡、表面泛出灰浆为准。5。3 Control concrete pouring thickness of each layer in the range of 300 500

40、mm,while vibrating the upper layer，the vibrator shall be inserted to 50mmof lower layer to eliminate the joint between adjacent layers.Keep space ofinsert points in cross direction and longitudinal direction to 400mm,thebenchmark should be as the standard that there are no apparent settlement，bubble

41、s and mortar.5.4 施工缝留设：承台施工缝留设于基础承台面,梁施工缝留设于梁长的 1/3 或 2/3 处.处理方法:砼初凝后将施工缝表面的砼凿毛,剔除松动石子及表面浮浆层，然后清理垃圾及钢筋表面的水泥浆及铁锈，下次砼浇筑前先洒水湿润施工缝表面,接着铺一层 50mm 厚与砼内成分相同的水泥砂浆，然后浇捣砼。5.4 Reservation of construction joint：the construction joint of cushion capis set on the surface and reservation of construction joint for b

42、eam is locatedon 1/3 or 2/3 position of the whole beam。The treatment method is mentionedbelow：After initial setting of concrete，chisel the surface of constructionjoint,remove the gliders and slurry layer on the surface,and then clean thedebris，slurry and rust on the surface of steel reinforcement.Pr

43、ior to nextconcrete pouring，water spraying has to be done on the surface of constructionjoint，and then put one layer(50mm thickness)of cement mortar which the contentis the same to concrete。Next steps are concreting and vibrating。5。5 砼浇筑至设计标高后，表面用抹子抹平,在砼终凝前进行二次抹面压光，以闭合收水裂缝。5.5 As the concrete pourin

44、g reaches to designed elevation,its surface will beflattened by float，previous to final setting,the second finishing andflattening can be started to terminate water shrinkage joint.5.6 养护措施:考虑到锅炉基础 CT5、CT-6 承台为大体积基础，砼浇筑后12 小时开始用一层塑性薄膜两层麻布进行保温、保湿养护。砼养护时间不少于 14 天。5.6 Curing Measures：Considering that H

45、RSG foundation CT 5 and CT-6 are bigvolume foundations，one layer of plastic film and two layers of sack cloth shouldbe put on for heat-preservation and humidity curing in 12 hours after concretepouring.The period of concrete curing should not less than 14 days.五、五、施工进度计划施工进度计划Construction ScheduleCo

46、nstruction Schedule5。1 施工进度计划，详见余热锅炉基础施工进度计划横道图5.1 About the details of Construction Schedule,please refer to“Gunter Drawingof HRSG Foundation Construction Schedule”5。2 保证措施:5.2 Safeguard Measures编制一个系统、合理的施工网络计划，精心组织施工，强化施工管理,优化资源配置.Make up a systematic and reasonable construction network schedule，

47、andorganize the construction actively,strengthen administration of constructionwork and optimize distribution of resource.积极主动和建设、监理、设计院等单位积极配合，及时解决相关问题，为正常施工创选条件。Have good and active cooperation with employer，engineering unit and designunit,settle the relevant issues in time to create nice conditio

48、n for normalconstruction。周转材料、工具必须能满足施工需要，施工机械设备运行良好，材料数量能满足施工需求。Materials and tools must be satisfied the demand of construction work to makesure that construction mechanical equipments could work in good condition.实行合理的进度考核制度，根据工程进度需要,关键工序采取每日两班制.The reasonable progress feed back system should be

49、acted in the project,asthe demand of work progress，we adopt the working system of two working shiftsper day in significant working procedures.六、资源需求计划六、资源需求计划Plan for Resource DemandPlan for Resource Demand6。1 劳动力计划 Human Resource Plan序 号Series No工 种Type of数 量Quantity序 号Series No工 种Type of数 量Quantit

50、y1Work木 工Carpenter钢筋工Steel fixer砼 工20 人5Work机修工Mechanist普工GeneralWorker合 计2218 人673ConcreteWorker架子工18 人15 人ScaffoldTotal80WorkerWorkers6.2 主要材料投入量6。2The Main Materials input钢筋120 吨;混凝土-1100m3；钢管 80 吨；木模板400m2；Steel Bar 120TConcrete1100m3Steel Pipe-80TFormworks-400m26.3 主要机械设备46.3 Main Mechanical Eq