轻型井点降水法施工工艺

1、De es, sf： Hel o! in the r unuptot I e Spring Fas 、 hed i ne sen of fu safeesenaves C.nf nce 20 13 workshop, ful back i n ccaeu anay of the curr et si ua.n, . ss 203 pment plasHeeonbealofmycmpay w ork reors tie GeniAssemby, fr ”一0.P- I, 202 ba ck i a| XX power compaie s adee to the parts . gea spii

2、for guidance,com.ehe- impeme nt the sce ntic ccncet of devel opmetprom Ung - sea desi saegy .da- focusonmplemetaion,lea,ma.- et, coniuusy impr ove, saey.ai on i f etepri - maageme nt bus nes ma nagement a ndont oi s.c a nd sa.ize d, and the de dcat mol sf, manage a hamoniousandm ocatc amosph of the

3、good .uaton Mai nidca os are as fol owst.e batey i ndiat i r： po-we ge neain totaed 785 bilonkW,b. ond the a nnua budge mpl amenta.n - pacly of 35m,n k W, an inceae of 7r mi in kW.Sils totald '425 biin k W, ecedi ng sae s of milin kW theanua Exe -tve budge, a i ncea - of 79 miin k W. Seury meaue

4、s unpannedoutaggs25一.Nopesnalinjuyacidetoccur,dnomajora e nt ad abo<e, nomaor fie a_i det s wihout e nVionmeta polui on a_ie nts, fey fr the e cnseutve yeas to ma ntai sta I ity to g ood postue.（u.nnss f nacia idiat ors tota prfis of 25 mil on Yuan, beynd t he annua budge of f miin Yua,beyndtheDa

5、tangcompany iddx ! mlin Yuan,aIiceseof"miinYuan,FMasesmetatgadefu.Ene.ypowe supy sadad ca compl eig 3> g/k W, dow 01g /kW； ie. d a y powe cnsmpt onr i 52%, dw ssins.efrmanne gra ty rrd . e d compae d to las ya r, cabon 019 g /kW, sulu dixde 114 g /kW NOx 052 gkW；.s emo -ekiecy of moe t ha9L8

6、%. Rela biiy index equiae I t aalaiiy act or i 9l4r%, inccese d '15% fom a yea larie.uiaent fccd ouage ae 018%,1116% re duccion ove te smepei od a yar eal erMaor Ichevmet s is, shou d a dee to t he two "mange met lysem" bbss ste I gte ning tecnolgi esar c, sengte n hi dden ha zads cont

7、ol ad intinsc saey EEerrie consuclton tok new se ps The tw o "mangetsystm" frimp.-ment Foccs on pr omoting the powe of theccmpaI y manngetsystma nd the aplccai on a id mpementtti on of te saey lop fiesa maagementlysem, improve t he saey manngetsystm, relzte lysem of -fey ccntol lurherrrgul

8、teiecuiy routne s, fey iupevs on a nd mang etnew o. re t lay tohe- cosld10P.ste ngteing the lupeVsi on a n.manngetof ha "- V oaton of sregheningthesaeysueVsiin of ousouci ng contac or. Caarid out isrng a nd a uumn of sry inspct ons, 10d contol a nd i nspect n,e, pr cin-e, and te 0ympc Gm - 1adm

9、te轻型井点降水法施工工艺在基坑开挖深度较大，地下水位较高，而土质较差（如粉砂、细 砂等）的情况下，用集水坑降水法施工往往容易出现坑内涌水、斜坡 失稳塌方、坑底上冒（即管涌）、流砂等现象。不但使基坑无法开挖， 还会造成大量水土流失，影响邻近建筑物的安全，为此一般采用人工 井点降水。井点降水法就是在基坑开挖之前，在基坑四周埋设一定数量的滤 水管，挖方前或挖方过程中利用抽水设备，通过井点管不断抽水，使 地下水位逐渐降落至基坑底以下，形成较为稳定的水位曲线。由于在 基坑开挖过程中仍不断抽水，这样可使所挖土体始终保持干燥状态， 从根本上防止了地下水涌入坑内，也防止了流砂的发生，既改善了工作环境，也利于

10、提高工程质量。若井点降水影响邻近建筑物的沉降与 安全，应采取措施，用回灌法，旋喷加固土壤等法解决。各类井点降水参考适用范围项次井点类别土层渗透系数/ (m/d)降低水位深度/m1单层轻型井点0.1 50362多层轻型井点0.1 506123喷射井点0.1 28204电渗井点<0.1根据选用的井点确定5管井井点20 200356深井井点10 250>15井点降水有两类：一类为真空抽水，有轻型井点(单级或多极) 电渗井点和喷射井点；另一类为非真空抽水，有管井井点和深井泵等。 施工时应根据含水层分布及类别、渗透系数、降水深度、工程特点及De es, sf： Hel o! in the r

11、 unuptot I e Spring Fas 、 hed i ne sen of fu safeesenaves C.nf nce 20 13 workshop, ful back i n ccaeu anay of the curr et si ua.n, . ss 203 pment plasHee on beal of my cmpay w ork reors tie GeniAssemby, fr ”一0.P- I, 202 ba ck i a| XX power compaies adee tothe parts . gea spii for guidance, com.ehe-

12、impeme nt the sceti. conceptof developmet promi Ing - sea desi saegy nda- focuson impi -eta”, lea ,ma.- et, coniuusy impr ove, saey .ai on i f etepri - maageme nt bus nes ma nagement a nd cont oi s.c and sa.ize d, and the dedcat mol sf, manage a hamoni ous and m ocatc amosph of the good .uaton Mai n

13、idca os are as fol owst.e batey i ndiat i r： po-wege neain totaed 785 bilonkW, b. ond the a nnuai budge mpl amenta.n - pacly of 35m,n k W, an inceae of 7r mi in kW.Sils totald '425 biin k W, ecedi ng sae s of milin kW theanua Exe cutive budge, a i ncea - of 79 miin k W. Seury meaues unpanned out

14、aggs 25 一.No pesnal i njuy aci det occur, d nomajor acdde nt ad abo<e, nomaor fie acci det s wihout e nVionmeta polui on .cdes, fey fr the e cnseutve yeas toma ntai sta I ity to g ood postue.(u.nnss fnacia idiat ors tota prfis of 25 mil on Yuan, beynd t he annua budge of f miin Yua,beynd t he Dat

15、a ng compay idx 41.9 miinY-n, a I iccese of " mi in Yua n, FM a sesmet at gade fu.Ene.y powe supy sadad ca compleig 3>g/k W, dow 01g /kW； ie. d a y powe ccnsmpti onr i 52%, dw ssins | efrmance gra ty rduced compaed to las ya r, cabon 019 g/kW, suludixde 114 g /kW NOx 052 gkW； .s emo -ekiecy

16、of moe tha9L8%. Re- biiy inex equiae I t aalaiiy act or i 9l4r%, iccese d '15% fom a yealarie.uiaent fccd outage ate 018%, 1116%re duccin ove the smepei od a yar eal erMaorohevmets is, shou d a dee to t he two "mange met .sem"bbss stre I gthe nig tecnolgi esar c, sengthe n hi dden ha z

17、ads control ad itrisc saey EEerrie consuction took new se ps The tw o "mangetsystm" frimp.-ment Foccs on pr omotig the poweof theccmpa I y manngetsystma nd the aplccai on a id mpem etai on of the saety lop fiesa maagement lysem, mprove the saety manngetsystm, relz the lysemof -fey ccntrol

18、lurherrrgulte le-iyrouies, fey lupeViion a nd mang etnew o. re to lay tohe-Uosidloop.'te ngtheig thelupeVsion a n.manngetof ha I iua V oatin of sreghening the saety sueVsi in of outsouci ng contrac or. Caarid out isrng a nd a ,m of sry inspct ons, 10d contol a nd i nspect n,e, pr cin-e, and te0y

19、mpc Gm - 1admte设备条件等，通过技术经济比较，选择适当的井点降水方法。各类井 点降水方法的参考适用范围可参照上表选择。 以轻型井点降水法采用 较广。轻型井点降水施工工艺：轻型井点法降水就是沿基坑的一侧、二侧或四周将多根较细的井 点管埋入地下蓄水层内，井点管的下端装有滤管，井点管的上端通过 弯管与总管连接形成管路系统，利用装在管路系统上的抽水设备将地 下水通过井点管不断抽出，这样便可将原有地下水位降至坑底以下需 要的高度。轻型井点降水布置示意图1、井点管，直径与滤管相同，长度 57m。2、滤管，直径438®50mm,长度1.01.5m。3、总管：直径 ”00M27mm。4

20、、弯联管，一般为透明塑料管或橡皮管。5、抽水设备，包括真空泵、离心水泵和水气分离器等组成。ciVt , cmpre hens ad amping Saey Foundaion.Trulesoot ng managme nt meca , g- ul ply t roe of ecnca lupe vn and relzt mana.ment, impr ovid pr mang-et This.acmpetdtheboierlowehhadela-eIoilepesue,amajrri sk mang-et, compl d 21 of gea risks and 3 Geea prbllms

21、 of govenac.C.mp chmi sty la cnsr ucion, tema contol andcomptheboleIc ittgratd ma saigvibrainof0scentifcadtchnolgl pr oecs, luca sCcmpeesuecit ca 63MW I nie smuain systmd l opme nt ad applcat onof cr cuat ng er MCC sady po r'rasfmain, thetansormainofdeonwase e, the ui w r suply ly m of copehetea

22、met ad dscage v modifcaton of ca mil 5kly tchnolgi l ta nsfmainprtc' goup hhalhis improve d Se ad tecnolgy innovaionsurherincese d. Steg he t he caacerst of luper crtl unit mjr i slue, gidialy cleai ng te par - laiy of lupecii ca uni and eg ulaiy Dveoped mot or oi tme maagement, swtcacintmessats

23、tcscoaadedmla lurme I t sfKe, mpr o<es te prduci on eel of lea manag -et Incrale d i-smet i nlcie and ecnolgy reortng Ice and ecnolgy pro.Sad4ecnicaprojectta cS perentge of te tal a nnua pr ooucinoutu of 02%. "ageldecafird powe pla nt fue g de sului in, de ntfcain cmplee deveopment ad aplin

24、of Iky tehnologie"proea w on te nainal ice andtecnologyprogesscondprieCll* lupecitcauiloptmiedcntrlsatgesand te DIM W deelpmet ad aplcatonIf onie smulaton sstm for lupeciilunis sue citcl 1611r W ui s of uri ne drie boie fed lump se of cm prhe nlie teamet of defcl Da ng ecnol ogy respctvey one o

25、r tw adtidM-nwie ifmainecnolg, acme nt* the compay s nnmid "，iapoweifmai.ne cnol“ becmak ng ee ”."一 i 1ad mai nea nce h_ mpr o-d f-te. M odiy te i n.ecionsa nda- ad .tad-onarrg1a bas> sa ndadiig work proc-re, ceckng ad i n-eci on re c. De pe nig the us . a nd mpl -es mante na iformat on

26、 saed R rganii g R 1g c , a d e n-e te -.c of te rb .no-ig the mecaim of maienamanng-e nt implme nttd a pr e c maager .，u cmpein of tw-1nom . ma .enan- , eiaii, mpr ovd sta d、mpeme ntig tw cl eve mantea nce pr-t th1 0.7% and123%pecty -Cm pls w ci _lai ng p.m 1s eai a d oveha u of f. Ml * maie na 1am

27、s t getexecsePromotethewrkofeneg,. g a nd -n-mpt on re ducig cmpl ee the - i eneg, 一 pin dagos * pant wer baa ncee» 0 eegy sving pro|CsSlcond shoud a dhe e to "trre"ont he ecnomic beei* of improvingoutech3spring a nda utumn ofsecurity inspecti ons,floodcontrol a nd i nspecti on,safety

28、pr oduction mont h, daysupervision of pr oductionsafetyand the Olympic Games andotherDelegates,staff: Hell o! inthe r un-uptot he Spri ng Festival,we held one session offourstaffrepresentativesConference2013-workshop,full back i n2012,careful analy sis ofthecurr ent sit uation,discuss2013 developmen

29、t plans.Here,onbehalf of my com pany2013w ork reports totheGe neralAssembly,for consi deration.PillarI, 2012ba ckin 2012,XX pow er companie sadheretothe party's 17great spiritfor guidance, comprehe nsivelyimpleme ntthe scie ntificconcept ofdevelopment, prom oting cost-lea dership strategy, stand

30、ards,focusonimplementation, lea nmanagem ent, continuously impr ove,sm ooth present safety situation ofenterpri se manageme nt, busi ness ma nagementa nd contr olscientific a nd standardize d,and thede dicati on ofstaff,managea harmoni ousand dem ocraticatmosphereofthe good situation.Mainindicat or

31、sare asfoll ows:-t he battery i ndicat or: powerge nerationtotaled7.815billionk Wh,bey ondthe a nnualbudget impl ementation ca pacity of315million k Wh, an increase of757mil lion kWh.Salestotaled 7.425 billion k Wh,exceedi ng sale s of330 million kWhtheannual Exe cutive budget,ani ncrea se of729 mil

32、lion k Wh. -S ecurity measures: unplannedoutages2.5times.No personali njury a cci dent occurre d, no majoraccidentand above,nomajor fireacci dent swithoute nvironmental pollution ac cidents,safetyforthre econsecutiveyearsto mai ntain stabilityto g ood posture. Busi nessfi nancialindicat ors:totalpro

33、fits of255milli onYuan, beyond t hea nnualbudget of207million Yuan,beyondt heData ng companyindex41.89 millionYuan,a n increase of1.76millio n Yua n,FCM a ssessment atgrade four. -Energy: power supply standard coal compl eting312.25 g/k Wh, down 0.1 g /kWh;integratedauxiliary powerconsumpti on ratio

34、 in 5.12%, dow n 0.26%;pollutantemissionsperformancegrea tly reduce d compare dto lastyea r, carbon 0.09 g/kWh,sulfur dioxide 0.104 g /kWhNOx0.512 g/kWh; dust removaefficiency of more t han 99.8%.-Relia bilityindex: equivale nt availabilityfact orin 93.47%,increase d 7.95% from ayearearlier.Equivale

35、ntforced outage rate 0.08% ,0.16%reductionoverthesame peri oda yearearli er.Majorachievement s: first,we shoul da dheretot hetwo "managementsystem" basis, stre ngthe ningtechnologi calresear ch, strengthenhi dden ha zards controlandintrinsic safety Enterprise construction took newste ps. -

36、The tw o "managementsystem" for improvement.Focus onpr omotingthe powerofthecompa ny managementsystem andtheapplicati ona nd implementati on ofthe safety loop five-starmanagementsystem,improvet hesafety management system,reali ze thesystem ofsafetycontrol.Further reg ulatesecurityroutine s

37、,safetysupervision a ndmanag ement netw orkrole to playtoachieve closed-loop.Stre ngtheningthesupervisi on a nd management of ha bitualvi olationof, strengthening thesafety supervisi on ofoutsourci ngcontract ors.Carried out in一、轻型井点降水设备： 轻型井点降水设备由管路系统与抽水设备两大部分组成。甲、管路系统：包括滤管、井点管、弯联管及总管等。1 、滤管：滤管是进水渗

38、透管，其构造是否合理对抽水效果影响很大。滤管的直径多为 3850mm,长 度为1.01.5m,管壁呈梅花形，钻有直径为13 19mm的圆孔，管壁外包两层滤网，内层为细滤网，采用网眼3050孔/cm黄铜丝布或尼龙丝布；外层为粗滤网，采用网眼 510孔/cm的铁 丝布、尼龙丝布或棕皮。为避免滤孔淤塞影响流水畅通，滤网与管壁之间用小塑料管或梯形铁丝绕成螺旋状隔开。滤网外面再围一层8 号粗铁丝保护网。滤管下端为一锥形的铸铁头子，上端与井点管连接。2、井点管与弯联管：井点管的直径与滤管相同，其长度为57m,可整根或分节组成。井点管的上端用联管与总管相连。弯联管可用透明塑料管、胶皮管或钢管，上均装有阀门，

39、用于检修井点。3、总管：总管一般用直径为100127mm的钢管。每节长度为4m,其上 每隔0.8m或1.2m设一个与井点管连接的短接头。乙、抽水设备及工作原理：抽水设备由真空泵、离心泵和水气分离器等组成。其工作原理如下图所示。ctivities,compre hensive andtamping SafetyFoundation .Troubl eshooti ng,manageme ntmechanism,give full playtorole oftechnicalsupe rvision andrealizationoftroubleshooting,management,impr o

40、ved process management.Thisyearcompleted t heboiler l owerhea derleakage, boil erpressure,a majorri skmanagement, completed29 ofgreat risksand 3 Generalproblemsofgovernance.Completechemistrylabconstr uction,thermalcontrol,and completet he boilerscale integrated management, hostshaftingvi bration of1

41、0 scie ntificand technologi calpr ojects,such a s.Completesupercriti cal630MW on-line simulation systemdevel opme ntand applicati on ofcir culati ngwater MCCstandbypower transformation,thetransformation ofdesulfurization w astewater,the unitwater supplysystem ofcomprehensivetreatmentand dischargeval

42、vemodification ofcoal mill5keytechnologicaltransformationprojects,grouphealth is improve d. -Science andtechnology innovati on isfurt herincrease d.Strengt hen t he characteristi csofsuper critical unitmajori ssues,graduallycleari ngthe particularityofsupercriti cal unitand reg ularity. Developedmot

43、 oroiltimemanagement,switcha ction times,statistics,coal-aidedmea sureme nt software,impr ovesthe producti on level of lean manag ement. Increase d investment i n sci enceand technology, reporting scienceand technology proje cts and 14techni cal pr ojecttotal cost percentage of thetotala nnualpr odu

44、ction outputof0.25%."Large-scalecoal-fired powerpla ntflue gas de sulfuri zation, de nitrificationcomplete development and appli cation ofkeytechnologies"project ,w on thenationalscience andtechnologyprogresssecond prize.630MWsupercriticalunits optimize d controlstrategiesa nd the630M Wdev

45、elopmentand application ofon-line simulation systemforsupercriticalunits,supercritical600M W unit s ofturbi ne drivenboilerfeed pump set ofcom prehe nsive treatment ofdefects Data ng technol ogy respectively oneortwo andthird.Meanwhile,informationtechnologyachieveme nts,the companywas named "Ch

46、i na powerinformati on te chnology benchmarki ng enter prises."-Repa irand mai ntena nce has impr ovedfurther.M odifythe i nspecti onsta ndards andstandardson areg ularba sis,sta ndardizing w ork procedures, checki ng andi nspecti on proje ct.Dee pe ningthe BFS+system,a ndimpl ements mainte nan

47、ce informati on shared. Re organizi ng RBlogi cagain,a nd e nsure thesuccess oftheRB. Innovatingthe mechanism ofmaintenance manageme nt, im pleme nted apr oje ctmanagersystem.Successfulcompletion oftwoautonom ousmai ntenance ,reliability impr ovedstea dily.Impleme ntingtwo c-l evel maintena nce,proj

48、ectthemselves48.7%and42.3%, respectively.Accomplish tw ocir culati ng pum ps repaira nd overha uloffourMill s,mainte nance teams togetexercise.Promotethe workofenergysavingand consumpti onre ducing, compl etethe unit energy consum ption diagnosi s, pla ntwater bala ncetest,10 energy-saving pr oje ct

49、s.Second,we shoulda dher e to "three" ont heeconomic benefits ofimproving, outreach7Delegates,staff: Hell o! inthe r un-uptot he Spri ng Festival,we held one session offourstaffrepresentativesConference2013 -workshop,full back i n2012,careful analy sis ofthecurr ent sit uation,discuss2013

50、development plans.Here,onbehalf of my company2013w ork reports tothe Ge neralAssembly,for consi deration.PillarI, 2012ba ckin 2012, XX pow er companie sadheretothe party's 17great spiritfor guidance, comprehe nsivelyimpleme ntthe scientific concept ofdevel opment, prom oting cost-lea dership str

51、ategy, standards,focuson impl ementation, lea nmanagem ent, continuously impr ove,sm ooth present safety situati on ofenterpri se manageme nt, busi ness ma nagementa nd contr olscientific a nd standardize d,and thede dicati on ofstaff,managea harmoni ousand dem ocraticatmosphereofthe good situation.

52、Mai nindicat ors areasfoll ows:-t he battery i ndicat or: powerge nerationtotaled7.815billionk Wh,bey ondthe a nnualbudget impl ementation ca pacity of315million k Wh, an increase of757mil lion kWh.Salestotaled 7.425 billion k Wh,exceedi ng sale s of330 million kWhtheannual Exe cutive budget,ani ncr

53、ea se of729 million k Wh.-S ecurity measures: unplanned outages2.5times.No personali njury a cci dent occurre d, no majoraccide ntand above,nomajor fireacci dent swithoute nvironmental polluti on ac cidents,safetyforthre econsecutiveyearsto mai ntain sta bilityto g ood posture.Busi nessfi nancialind

54、icat ors:total profits of255milli onYuan, beyond t hea nnualbudget of207million Yuan,beyondt heData ng companyindex41.89 millionYuan,a n increase of1.76mil lionYua n,FCM a ssessment atgrade four.-Energy: power supply standard coal compl eting312.25 g/k Wh, down 0.1 g /kWh;integrate dauxiliary powerc

55、onsumpti on ratio in 5.12%, dow n 0.26%; pollutantemissions performancegrea tly reduce d compare dto lastyea r, carbon 0.09 g /kWh,sulfur dioxide 0.104 g /kWhNOx0.512 g/kWh; dust removaefficiency of more t han 99.8%.-Relia bilityindex: equivale nt availabilityfact orin 93.47%,increase d 7.95% from a

56、yearearlier.Equivalentforced outage rate 0.08%,0.16%re ductionoverthe same peri oda yearearli er.Majorachievement s: first,we shoul da dheretot hetwo "manage mentsystem" basis, stre ngthe ningtechnologi calresear ch, strengthe nhi dden ha zards controlandintrinsic safety Enterprise constru

57、ction took newste ps. -The tw o "managementsystem" for improvement. Focus onpr omotingthe powerofthecompa ny managementsystem a ndtheapplicati ona nd implem entati on ofthe safety loop five-starmanagementsystem,improvethesafety management system,realize thesystem ofsafetycontrol.Further regulatesecurityroutine s,safetysupervisi on a ndmanag ement netw orkrole to playtoachieve closed -loop. Stre ngtheningthe supervisi on a nd management of ha bitualvi olationof, strengthening thesafety supervisi on ofoutsourci ngcontract ors.Carried ou