5 : 255 (MPa);r (mm);r i (mm);r o (mm) 2.2 (1) (PE) ( po=0 ) (PU)3 3 :1 σr σθ ;2 ;3 1 1 Fig.1 Stresscalculationdiagramofmultilayercompositelayer 2 (σ

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1 GeologicalScienceandTechnologyInformation Vol.37 No.5 Sep doi: /j.cnki.dzkq [J] (5): ( ; ; 3. ( ) ) : : ; ; ; :P642;TE88 :A : (2018) [1-2] [3] 6 [9] 6 (68%) (18%) (9%) (5%) [4] [5] [6] : 2.1 [10] (Lame ): [7] σr = pir2 i -por 2 o - ( pi-po)r 2 ir 2 o R 2 o -Ri 2 (R 2 o -R 2 i) r 2 (1) σθ = pir2 i -por 2 o + ( pi-po)r 2 ir 2 o R 2 o -Ri 2 (R 2 o -R 2 i) r 2 [8] :σr (MPa);σa PU (MPa);pi (MPa);po : : : (1966 ) @qq.com : (1994 ) yhchaos@ 163.com PE 2

2 5 : 255 (MPa);r (mm);r i (mm);r o (mm) 2.2 (1) (PE) ( po=0 ) (PU)3 3 :1 σr σθ ;2 ;3 1 1 Fig.1 Stresscalculationdiagramofmultilayercompositelayer 2 (σ r ) Rmo = (σ r ) Rm+1i u Rmo = u Rm+1i pf: pf =k m (R mi R 3o E m K m μ m) pim =1~3 (2) :k m m ( 2) ;E m m (MPa);K m m ; μ m m ;R mi m (mm);r mo m (mm) σz=0 Lame (1) σθm : σθm = σrm = mo ( 2 )- pf pi K 2 m -1 1+R2 r K 2 m -1 K2 m + R2 mo r m =1~3 (3) mo ( 2 )- pf m 3.1 σrm ( ) 2 ( ) pi K 2 m -1 1-R2 r K 2 m -1 K2 m - R2 mo r m =1~3 (4) :σθm m (MPa);σrm m (MPa) 2 : εθm = 1 ( σθm E m -μ ) mσr m m =1~3 (5) :εθm m 3 [11-12] [13-14] mm 1 m ASOE PE Fig.2 2 (a) (b) Long-term tensilecreeptest(a)long-term bending creeptest(b)

256 2018 PU( ) NI14 2 1 2 1 Table2 Sizeandperformanceparametersofeachliningof Table1 Specimensizeandquantity foldingpipe /(mm mm) 50.8 50.8 ASTM D1777 5.

3 PU( ) NI Table2 Sizeandperformanceparametersofeachliningof Table1 Specimensizeandquantity foldingpipe /(mm mm) ASTM D mm I ASTM D638 4 MPa(67 MPa); 32MPa(470MPa); 45 25MPa(179MPa) ASTM D MPa(25.1 MPa) ASTM D ±0.6 ; 40.5±0.6 Rmi/mm Rmo/mm E/MPa PE PU ASTM E % ( z=0z=36 I ASTM MPa mm) ASTM MPa K( 0.5) x y z E mm ( 4-c) 0.6 MPa ASTM D1599 z ( 3) z=0z=36 mm UZ=0 3.0 MPa FEA (236 MPa)( 5-a) KEVLAR29YARNS 200 MPa 3 3 MPa MPa Fig.3 Strengthtestandtightnesstestofflexiblepipe whole KEVLAR29YARNS 200 MPa performance ( 5-b) 3 MPa 8.3% 0.6% % FEA ( 4-a) ( 4-b) 1/4 SOLID45 COMB- 0 PU υ

Comparisonoffiniteelementsimulationandtheoreticalcalculationresults 3 MPa( ) PE PU /MPa /MPa /MPa FEA 4.2 0.0036 232 0.

4 5 : 257 Fig.4 4 (a) (b) (c) Hosestructurediagram (a)hosefiniteelementmodel(b)andmeshgenerationandconstraintset(c) Fig.5 5 (a) (b) Maximumstressincompositehose(a)andcompositehosestrainoneachlayer(b) 3 Table3 Comparisonoffiniteelementsimulationandtheoreticalcalculationresults 3 MPa( ) PE PU /MPa /MPa /MPa FEA KEVLAR29YARNS 200 MPa(ASTM D412-61T) 2 PE FEA PE PE PE PU FEA 0.4% [15] 2 :1 FEA ;2 ( ) 4.1 ;3 30a ;4 90% 140km 20km 3000

258 2018 km 6 m/min ;6 4.2 50kPa [16] U ;7 30% CCTV ;8 GB50268 0.8 MPa :1 : 0.8 MPa 30 min ;2 ; : 6-a ;3 15min;15min 0.02 MPa (0.4 MPa) U ;4 30min ;9 ;10 ;5 6-b 6 (a) (b) Fig.

5 km 6 m/min ; kPa [16] U ;7 30% CCTV ;8 GB MPa :1 : 0.8 MPa 30 min ;2 ; : 6-a ;3 15min;15min 0.02 MPa (0.4 MPa) U ;4 30min ;9 ;10 ;5 6-b 6 (a) (b) Fig.6 Internalsurfaceimageaftercleaning(a)andcompletedcompositehoselinerimage(b) 5 (3) (1) (4) (2) : [1] WannagatFLobanovaTSalyukovVetal.Implementationof thenew Primusline pipelinerehabilitation methodinthe Russian Federation[C].International Gas Union Research

6 5 : 259 Conference[IGRC] ternationalno-dig2011paper3b-04. [4]. main[j].canadianjournalofcivilengineering200128(6): [J] (2): [5]. : - [13]. [D]. : [J] (3): [6]. [J]. [14]. PVC-FRP-PE 2007(4): [7] CJJ/T [15]. [M]. : [S]. : [8]. [16]. [J]. [J]. 2007(5): [9] RameilM.Blastfromthepast:Ahistoryofpipebursting[C]. TT GroupTrenchlessInternational2009. [10]. [M]. : [D]. : (4): ApplicationofTrenchlessTechnologyinNaturalGasPipelineRepair HuChenghong 1 XiaJufei 2 ZhaoYahong 3 (1.KunmingGasGroup HoldingCo.LtdKunming650041China; 2.YunnanPetroChinaKunlunGasCo.LtdKunming650041China; 3.FacultyofEngineeringChinaUniversityofGeosciences(Wuhan)Wuhan430074China) [2] Ragula G.A utilityperspective:what sholdingcipplining backfromgasindustryapplicationsinnorthamerica[c].in- [3]. [11]. [M]. : [J] (9): [12]ZhaoJQDaigleL.Structuralperformanceofsliplinedwater- Abstract:Foldinglining methodiswidelyusedin municipalwatersupplyanddrainagepipelinerepairin metropolis.howeverduetothediferencesofthestructurestrengthofliningfewcasesofno-dignatu- ralgaspipelinerepairarereportedbyfoldinglinermethod.baseonmaterialphysicalmechanicalproper- tiesandtestdatathispaperestablishedafiniteelementmodelandmathematicalempiricalformulaabout stressandstrainatthefailurepointofnaturalgaspipelineafterrenewingbytrenchlesstechnology.the applicationshowsthatthepipeburstingstrengthiswelcoincidedwiththemodelandformularesult.tak- ingthecurrentsituationofgaspipenetworkinkunmingcityintoaccountthepaperalsointroducesbrief- lytheprocessflowandapplicationprospectofcompositehoserepairingingaspipenetwork. Keywords:foldliningmethod;naturalgas;trenchlessrehabilitation;multi-layerthick-walcylinder

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转变思路, 迎接新挑战 2016 年 5 月 13 日新闻综合第 2 版努力付出收获在过去的 2015 年, 泵项目组在大家的支持和配合下, 用户业绩增多了, 我们的能力提高了, 大家的经验更近日, 公司收到由山东省科学技术厅山东省财政厅山东省国家税务局山东省地方税务局联合颁发的高新技术企业证书, 有效期 : 三年自 2009 年首次通过认定以来, 每三年一次认定, 本次是公司原高新技术企业证书有效期满所进行的重