英文版地下管网施工方案

1、;.SAIGON INTERNATIONAL TERMINALS VIETNAM PROJECTPackage 2 and package 3:Pavement and service works and building worksMethod Statement Of Underground Service System CHEC-SITV Project Management Office 2009.5.22CATALOGUE1. General81.1 Structure Plan81.2 construction content81.3 Main Construction quant

2、ity91.3.1 Storm water drainage system91.3.2 Waster water drainage system91.3.3 Construction flow of electricity and communication supply91.3.4 Water Supply System101.3.5 Fire Fighting System102、Compilation Basis103、Construction sequence114、Construction flow114.1 Construction flow of underground serv

3、ices system114.2 Construction flow of storm water drainage system124.3 Construction flow of waste water drainage system134.4 Construction flow of electricity and communication system144.5 Construction flow of water supply system and fire fighting system155 Drainage system ,sewage system, electricity

4、 and communication system165.1 Reinforcement concrete pipe165.1.1 Construction sequence165.1.2 Setting Out165.1.3 Trench excavation165.1.4 Foundation Compaction195.1.5 Bedding Laying205.1.6 Collar installation205.1.7 Pipe Installation205.1.8 Protection of concrete pipe225.1.9 Backfilling Trench235.2

5、 HDPE pipe construction235.2.1 Construction sequence245.2.2 Setting out245.2.3 Trench excavation245.2.4 Foundation Compaction245.2.5 Geotextile laying255.2.6 Laying HDPE pipe255.2.7 Backfilling275.3 UPVC pipe construction275.3.1 Construction sequence275.3.2 Setting out275.3.3 trench excavation285.3.

6、4 Foundation Compaction285.3.5 Installation of UPVC pipeline285.3.6 Trench backfilling295.4 u-channel and cable trench305.4.1 Sequence of construction305.4.2 Setting out305.4.3 Trench excavation305.4.4 Foundation Compaction315.4.5 Casting Blinding Layer325.4.6 Casting Bottom Slab325.4.7 Casting the

7、channel wall345.4.8 Grating Cast Iron Cover Installation355.4.9 Expansion joints setting365.4.10 backfing material365.5 Cable trench365.5.1 Sequence of construction375.5.2 Setting out375.5.3 Trench excavation375.5.4 Foundation Compaction375.5.5 Casting blinding layer385.5.6 Casting the bottom slab38

8、5.5.7 Casting the channel wall and top slab395.5.8 Cover installation425.5.9 Back filling435.6 Chamber (include all manhole )construction445.6.1 General sequence of construction445.6.2 setting out445.6.3 Base pit excavation445.6.4 Blinding casting455.6.5 Chamber casting455.6.6 Base plate casting455.

9、6.7 Chamber wall casting465.6.8 Cover plate installation515.6.9 Back fill515.7 Storage tank515.7.1 Construction sequence of storage tank (392m³)515.7.2 Construction survey525.7.3 Foundation Pit excavation525.7.4 Blinding layer placing525.7.5 Steel bar work of the storage tank525.7.6 Concrete wo

10、rk of base slab535.7.7 Formwork installation of the wall ,partition545.7.8 Concrete work of the wall ,partition565.7.9 Formwork installation of top slab575.7.10 Concrete Placing Of Top Slab595.7.11 Concrete curing595.7.12 Plastering and install the covers and ladder step595.7.13 Testing and acceptan

11、ce605.7.14 Back fill605.8 Apron of drainage outfall605.8.1 Sequence of construction605.8.2 Preparation605.8.3 Steel bar work605.8.4 Formwork installation615.8.5 Casting615.8.6 Curing615.8.7 Lifting and transportation625.8.8 Installation626 Water supply system and fire fighting system626.1 General626

12、.2 Installation of galvanized pipe626.2.1 Material626.2.2 Sequence of construction636.2.3 Measurement and lofting636.2.4 Trench excavation636.2.5 Locate pipe and appendix636.2.6 Installation of pipelines and fittings656.2.7 Testing of the pipe666.2.8 Pipeline Protection676.2.9 Back fill676.3 The ins

13、tallation of fire hydrant686.3.1 Materials quality requirements686.3.2 Sequence of construction686.3.3 Fire hydrant installation686.3.4 Casting branch pier706.3.5 Hydraulic test707 Construction of pump house707.1 construction of 350m3 water tank707.2 Pump construction707.1.1 Sequence of installation

14、707.1.2 Pump installation707.1.3 Suction pipe installation717.1.4 Pumps testing718 Quality control728.1 General specification728.2 main control items728.2.1 Pipeline construction728.2.2 Tolerance control738.2.3 Concrete work738.3 Protection measurement of finished product749 construction measures759

15、.1 protective measure in rainy season759.2 construction measure in hot climate7610 The construction progress7611Equipment and labour7611.1 Proposed main equipment7611.2 Proposed main labour7712. Health and safety control7712.1 Health7712.2 Safety control7812.2.1 Safety Supervision and Inspection7812

16、.2.2 Personnel Protective Measures7813. Environmental control79.1. General 1.1 Structure PlanThe underground service system include storm drainage system、sewage drainage system、communication pipe system、water supply and fire fighting pipe system.Storm water drainage system includes reinforcement con

17、crete pipe 、 HDPE pipe 、U-channel and manhole. The main pipeline is consist of three RC pipelines which vertically with the direction of the river, the outfall is set in the front side of terminal, the branch pipeline is consist of HDPE pipe 、 U-channel and RC pipe at the direction of river downstre

18、amSewage system includes RC pipe and manhole and storage tank. RC pipe and manhole mainly in area CY1 and area CY2 and area EG. The two storage tank are in area CS3 and CY3.Communication pipe system is consist of upvc pipe 、high and low voltage draw pit 、 extra low voltage draw pit that they set in

19、all area.Water supply system is consist of galvanized steel pipe 、 valves 、pump and water tank ,they mainly in area CY1 to CY4,galvanized steel pipe is set from area CY to area CS3 alone the terminal side near the holcim cement plant Fire fighting is consist of galvanized steel pipe 、valves、 pumps a

20、nd water tanks, they mainly in area CY1 to CY4, galvanized steel pipe and hydrant is set in the center and around side of terminal. 1.2 construction contentConstruction of the underground service system include the following content :1)、The excavating and backfill of trench and pit 2）、The laying of

21、RC pipe、HDPE pipe、 UPVC pipe、galvanized steel pipe3）、U-channel、manhole (include storm water system ，waster water system and fire fighting system )、water communication draw pit 、oil interceptor and water tank casting.4）、Precast of manhole cover and RC pipe collar 5）、The installation of station pump a

22、nd fire hydrant 1.3 Main Construction quantity1.3.1 Storm water drainage systemITEMDESCRIPTIONUNITQUANTITY 1RC PIPEm19892HD PIPEm66573MANHOLE、COVERNO.1424OIL INTERCEPTOR、COVERNO.45U-CHANNELm17466ApronNO.31.3.2 Waster water drainage systemITEMDESCRIPTIONUNITQUANTITY 1RC PIPEm4112MANHOLE、COVERNO.213OI

23、L INTERCEPTOR、 COVERNO.24STORAGE TANK1(2.0m×2.0m×1.7m)NO.25STORAGE TANK2(14.6m×14.6m×4.1 m)NO.11.3.3 Construction flow of electricity and communication supplyITEMDESCRIPTIONUNITQUANTITY 1DN100 uPVCm20525.2 2DN150 uPVCm3300.5 3DN200 uPVCm6210.7 4HIGH voltage draw pitNO.285Low volt

24、age draw pitNO.366Extra low voltage draw pitNO.191.3.4 Water Supply SystemITEMDESCRIPTIONUNITQUANTITY 1galvanized steel pipe m1380 2teeNO.7 3valveNO.6 4coneNO.5 5belowNO.6 6booster pumpNO.2 7pressure vessel (150L )NO.1 8water tank（350m³）NO.1 1.3.5 Fire Fighting SystemITEMDESCRIPTIONUNITQUANTITY

25、 1galvanized steel pipe m2938 2underground hydrant (DN125)NO.10 3pillar hydrant(DN125)NO.16 4teeNO.8 5valveNO.5 6coneNO.2 7belowNO.2 8ELECTRICAL PUMPNO.1 9JOCKEY PUMPNO.1 10DIESEL PUMPNO.1 11pressure vessel (200L )NO.1 2、Compilation Basis1)The relevant Specification of SITV Pakage 2.as following :Se

26、ction 05 drainage, Section 15 steel reinforcement, Section 16 concrete, Section 18 steel works, Section 36 waterwork - material & workmanship, Section 38 fire services system.2) Relevant drawing and detail drawing of storm water drainage、high/low voltage cable ducting layout、communication cable

27、and ducting layout、water supply system drawing 、fire fighting system.3、Construction sequenceAccording to the requirement of the employer, the underground system construction of the container stacking area shall be started with the sequence from CS1 to CS9. And for the container yard area shall be st

28、arted at CY2 and then CY1、CY3 and CY4. And the detail started date and the finished date refer to Clause 9 of the construction progress.4、Construction flow4.1 Construction flow of underground services systemPreparations for constructionLevel Measurement and PayingoffTrench and pit excavating，levelin

29、gprecast concrete cover、apron and culvert U-channel、water tank constructionConcrete pipe and apron installation, all kinds of chamber constructionGalvanized steel pipe system layingUPVC and HDPE pipe layingTrench and pit backfillingAcceptance of Quality4.2 Construction flow of storm water drainage s

30、ystemPreparations for constructionLevel Measurement and PayingoffHDPE pipe marking and transportation Trench and pit Excavating、levelingGeotextile layingBedding placingPrecast Culvert And Apron Culvert and apron installationHDPE pipe layingAssembling reinforcementRC pipe marking and transportationRC

31、 pipe layingFormwork installationManhole castingu-channel castingRC pipe base casting、geotextile layingPipe and manhole testing and washing Trench and pit backfillingAcceptance of QualitySHOU收4.3 Construction flow of waste water drainage systemPreparations for constructionLevel Measurement and Payin

32、goffTrench and pit Excavating、levelingBedding placingAssembling reinforcementCulvert installationFormwork installationRC pipe marking and transportationManhole castingWater tank castingRC pipe layingPipe and manhole and water tank testing and washing backfillingAcceptance of QualitySHOU收4.4 Construc

33、tion flow of electricity and communication systemPreparations for constructionLevel Measurement and PayingoffTrench and pit excavating、levelingUPVC pipe making and transportationAssembling reinforcementUPVC pipe layingFormwork installationUPVC Pipe testing and washing Draw pit castingCable trench ca

34、stingbackfillingAcceptance of QualitySHOU收4.5 Construction flow of water supply system and fire fighting system Preparations for constructionLevel Measurement and PayingoffBedding placingTrench and pit Excavating、levelinggalvanized pipe marking and transportationGalvanized steel pipe laying and fitt

35、ing installationAssembling reinforcementFormwork installationHydrant Manhole castingHydrant intallationWater tank castingGalvanized steel pipe system testing washingPump installationbackfillingAcceptance of QualitySHOU收5 Drainage system ,sewage system, electricity and communication systemStorm water

36、 drainage system, sewage drainage system and electricity and communication system mainly include construction work for pipe, drain, cable channel, manhole, oil interceptor and water tank.5.1 Reinforcement concrete pipeThe diameter of this reinforced concrete pipe is 300mm to1800mm, and the length of

37、 each pipe is 2.5m(not include the length of socket). 5.1.1 Construction sequenceSetting OutTrench ExcavationFoundation Compaction Foundation Acceptancebedding LayingCollar InstallationPipe InstallationPipe Testfill the cement mortar and lay bituminous woodCasting pipe supportlay the geotextile

38、Backfilling TrenchAcceptance5.1.2 Setting OutSurvey temporary bench mark on site according to drawing and bench mark appointed by engineer before excavation of foundation trench, the site temporary benchmark must be closed and the closure discrepancy ±12mm (K is the distance between two benchma

39、rks, unit : KM) , the temporary benchmark must be rechecked by engineer and then construction. Firstly, run a centerline and side line of pipe trench, stick the wooden pile and let out the lime line of excavation edge. Retest original ground level; mark the excavated depth of pipe trench on a point

40、at each 20m by bamboo pile. 5.1.3 Trench excavation Excavation by the method of machinery and manual labor combined, the compacted sand and a small quantity of CMD column were used as excavation material. The depth of trench excavation is according to the design drawing. 1) slope of trench Making th

41、e side slope of trench: Considering the effect of pipe installation by machine and dynamic load of temporarily stack tubing. When the trench depth is 1<h<1.5m , then trench slope shall be i = 1：0.25,(H:V). When the trench depth 1.5h<2m, then trench slope shall be i= 1：0.5,(H:V). When the tr

42、ench depth 2h<3m , then trench slope shall be I= 1：0.75,(H:V)2) the width of trench The width of excavation for reinforced concrete pipe shall be according to table5.9 (effective trench widths) in section 5 (drainage works) of contract specification. (Refer to table 01). Table 01Nominal diameter

43、of pipe（mm）Effective trench width (mm)Nominal diameter of pipe（mm）Effective trench width (mm)100550112522001506001200230022570013502450300750150026003751050165028004501150180029505251200195031506001350210033506751450225034007501500240035008251600255036509001900270038009752000285039501050205030004150

44、3) standard schematic drawingApron shall be set on slope surface for the slope stability and resisting the storm water in the rainy season . the standard schematic drawing of concrete pipe trench excavation is seen following Figure 01. Figure 01D1: diameter of pipeL1: effective trench widtha1: trenc

45、h width (300mm)b1: Work place on one side of concrete pipes ,b1=(L1-2a1-D1)/24) slope protection and temporary drainage measuresFor preventing the water collected in over-excavation place and the low levelpipe trench,drainage measure shall be adopted in excavation ,and the drainage measure mainly in

46、cludes trench drain and pumping drain. While construction, firstly, excavate the drainage trench of 300×300mm on both sides of pipe trench, and set a water-retaining dam of 200mm in height beside the top of slope so as to prevent the surface water flowing into the pipe trench. Set sump pits at

47、both sides of trench (see Figure 02). Drawing the water accumulated to the collection sump (see Figure 03) from sump pits by underwater pump (see Figure 01), and then pumped the water accumulated in collection sump off Site by water pump of larger power.Figure 02 Lay one layer waterproof fabric on b

48、oth side of sump pit to prevent water entering to sand bend. The sump pit drawing as follows:Figure 03 4) excavation method Excavation by excavator and repair by manual labor, strictly control the excavation axes, base elevation, width and slope proportion on both side of foundation trench during co

49、nstruction. While base excavation, 20cm thickness shall be reserved to prevent displacement and over-excavation. Then, manually clean out and leveling to keep the strength of groundwork, carry out foundation construction soon, and back filling by original sand in case of over-excavation. 5) material

50、 stacking The backfilling sand from excavation can be stacked near the groove for backfilling. Stack elevation shall be not less than +3mPD, the distance to groove side not less than 2m, and stack height not exceed 1.5m. The CDM cement grappier excavated in front of yard shall be carried away as dis

51、posed material.5.1.4 Foundation CompactionAfter the trench excavation being formed, level the trench manually and compacted it by plate vibrator, then complete the acceptance work in time. 5.1.5 Bedding LayingUse lean concrete for cushion and construction while no rain and water creep in groove, Whi

52、le water being ponded nearby, discharge the water out first and then cast concrete. Drainage work shall be continued and not be interrupted during ramming concrete and before cushion concrete being hardened. Fix channel steel of 10cm in width on the pipeline of both side of cushion, mark the elevati

53、on, which is to be casted, on angle iron at every 5m by level bamboo pile, use the ready-mix concrete for casting, spreading to leveling by manual labor while pavement, use plate vibrator to compactness, the sign of compaction is that the concrete not sink and no bubble, surface smooth and water gai

54、n. Test the elevation and flatness of cushion and entrance to move on to next stage if complying with design requirement and specification. 5.1.6 Collar installationThe collar is structure contains reinforcement ,it is precasted in concrete pipe plant and transported by land, it will be installed by

55、 truck crane assisting with manpower. On installation ,the collar shall be set under the pipe bottom near to the pipe joint according to design drawing . the axis of collar shall be on the specified alignment, in order to reach the specified level of pipe ,the compressible sheeting shall be placed between th