后张法预应力箱梁预制施工技术方案[1].doc

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29、KmXeT 剉豐S 0!2 痵僗軴?絜錧皊:W 蟸 8m4lO 絜錧皊:W 鄀 ppN 篘膥莮 n 袕焇#nW 0?絜錧-N 焇 4l 擽蔛鰁抍 eQ 婲 HQcY 剉塴續l 0?CSv?0 筶鮨0:g 癶緥Y 歔鰁軴Q2 朾 k 筶 al 膌 2?0i n d e xs h o w ni nt h et a b l eb e l o w .A s p h a l tc o n c r e t ec o n s t r u c t i o nq ua l i t yc o n t r o li n d e xd e t e c t i o np ro j e c tc h e c kf r e

30、 q u e n c ya n dt h et es tm e t h o dq u a l i t yr e q u i r e m e n t sora l l o w e dd e v i a t i o ne x p e r i m e n tme t h o dm i x e dm a t e r i a la p p e a r a n c ea ta n yt i m eo b s e r v a t i o ns e tm a t er i a lw e i g h t ,a n du n i f o r ms e x ,a nds e g r e g a t i o n ,a

31、 n do i lr a t i o ,a ndc o l o r ,a n ds m o k e ,a n dh a sn ogr a ym a t e r i a l ,a n do i lm i s s i o n ,va r i o u sp h e n o m e n o nV i s u a lm i x i n gt e m p e r a t u r ea s p h a l t ,a n ds e tm a te r i a lo fh e a t i n gt e m p e r a t u r eb yp o td e t e c t i o ne v a l u a t

32、 i o nm e e ts pe c i f i c a t i o nr e q u i r e m e n t ss e n s o ra u t o m a t i c a l l yd e t e c t s ,a n dd i s p la y e da n dp r i n tm i x e dm a t e r i a lf ac t o r yt e m p e r a t u r eb yc a rd e t e c t io ne v a l u a t i o nm e e ts p e c i f i c a t i o nr e q u i r e m e n t

33、ss e n s o ra u t o m a t i c a ll yd e t e c t sd i s p l a y e d ,a r t i f i c i a ld e t e c t i o nb yp o tm e a s u r e m e n tr ec o r d s ,D a i l yt a k ea v e r a g ee v a l u at i o nm e e ts p e c i f i c a t i o nr e q u i r e me n t ss e n s o ra u t o m a t i c a l l yd e t e c ts ,a

34、n dd i s p l a y e da n dp r i n tm i n em a t e r i a ll e v e ld i s t r i b u t i o n0 . 0 75 m me a c hT a i w a nm i xc o l l e c t i o nma c h i n ed a i l y1 - 2t i m e s ,t o2asa m p l eo fa v e r a g ee v a l u a t i o n?1 %T 0 7 2 5p u m p i n gm e n t i o ns c r e e n i n ga n ds t a n d

35、a r dl e v e ld i s t r i b u t i o nc o m p a r e do fp o o r4 . 7 5 ,a n d9 . 5 mm?3 %e9 . 5 m m?5 %a s p h a l td o s a g e( o i lra t i o )e a c hT a i w a nm i xc o l l e c t i o nm a c h i n ed a i l y1 - 2t i m e s ,t o2as a m p l eo fa v e r a g ee v a l u a t i o n?0 . 2 %p u m p i n gm e n

36、 t i o nT 0 7 2 2T 0 7 2 1g a pr a t eE a c hT a i w a nm i x i n gm a ch i n ed a i l y1 - 2t i m e s ,t o4 - 6atr yp i e c e sa v e r a g ee v a l u a t i o n3 - 6%T 0 7 0 2 ,a n dT 0 7 0 9M a r s h a l ls t a bl ed e g r e e se7 . 5 K Ns a t u r a t e dd e g r e e s5 5 - 7 0 %pr e s s u r er e a

37、ld e g r e e se a c h2 0 0 0 m 2c h e c k1g r o u pe9 6 %T 0 9 2 4 ,a n dT 0 9 2 2f l a td e g r e es( m a x i m u mc l e a r a n c e )a ta n yt i me1 0 M MT 0 9 3 1c r o s ss l o p ed e t e c t io ne a c hs e c t i o n?0 . 3 %T 0 9 1 1t h ic k n e s saaT a i w a nc l a s ss e c t i o no fa v e r a

38、g e- 8 m mt o t a lt e s tp r o f il ee l e v a t i o nd e t e c t i o ne a c hs e c ti o n . . .S e g r e g a t i o ni nt h ep r o c e ss .C h e c kt e s tp r e p a r a t i o np r i o rt oa p p l i c a t i o no fv a r i o u sm a t e r ia l s ,d e t e r m i n es o u r c ea n dq u a l i ty ,d e t e r

39、 m i n e db yt h ec h o i c eo fma t e r i a l si nt h ec o n s t r u c t i o no fm a i n t a i n i n gc o n t i n u i t yo fu s e ,nof r e er e p l a c e m e n t .I no r d e rt oe n s u r et h el o w e rb o n d i n ga n dk e yw a t e ra n dc r u s h e ds t o n eb a s e ,be f o r ec o n s t r u c t

40、i o no fs y n c h r o n o usc r u s h e ds t o n es e a lc o a to fa s ph a l tf o rp a v i n g ,g u a r a n t e e dc l e an l i n e s sa n df l a t n e s sr e q u i r e m e n tsi nt h el o w e rl a y e r .A. . .l a r geg r a i ns i z ea s p h a l tg r a v e la g g re g a t ec o m p o n e n t si nl

41、e s sp r o n etoo v e r h e a t i n gi nt h ed r y e r ,m i x in gt i m ew i l ll e a dt oa g i n g ,w i t ht i m e l ya n ds t r i c tc o n t r o lo ft hem i x i n gt e m p e r a t u r eo ft h em i x tu r ea n dm i x i n gt i m e .A s p h a l th e atc o n d u c t i n go i lh e a t i n g ,t e m p e

42、ra t u r ec o n t r o li nt h er a n g e1 5 0 - 17 0!,a g g r e g a t eh e a t i n gt e m p e r at u r ec o n t r o li nt h er a n g e1 7 0 - 1 85!,m i x i n gf a c t o r yt e m p e r a t u r es h o u l db ec o n t r o l l e da t1 6 0 - 1 7 0 ,w i t h o u to v e r h e a t i n g ,w h e nt h eas p h a

43、 l tm i x t u r et e m p e r a t u r ee x c e ed s1 9 0?cb ea b a n d o n e d ,h a n d / c ut - o u to ft h eb o xt e m p e r a t u r ei sd e t e c t e d .B .m i x i n gt i m eb yt r ym i xt od e t e r m i n e ,b i gg r a i nd i a me t e ra s p h a l tg r a v e lm i x e dm a t e r ia lm a x i m u mg

44、 r a i nd i a m e t e rc o m p a re db i g ,a n dr o u g hs e tm a t e r i a lmo r ea n da s p h a l td o s a g es m a l l ,b yn e e d e dm i x i n gt i m es h o u l db em or e c o n s t r u c c i ?iE n g i n y e r i ad ed re n a t g ed el at r a v e s s ad ec a n o n a dad eg r a ni m p a c t e .C

45、o n s t r u c c i ?del o r g a n i t z a c i ? ,c a n o n a d e sd edr e n a t g ee n t e r r a tm ? sp r o f u n d ,s eg u e i x e ne lp r i n c i p id eq u a l s e v o la l t r ac o n s t r u c c i ?d ec a n o n a d aded r e n a t g e .P r o c e d i m e n t sia r r i ba rau nc o n s e n sa b a n s

46、d el ac o n st r u c c i ? .8 . 2 . 2s i n c e r a m e n tf a m i li a r i t a ta m bp l ? n o l sii n f o r m a c i ?t ? c n i c ar e l a c i o n a d a ,d i b u i x o s ,a s s i s t i re lr e p a r t i re ld i s s e n yic o n s t r u c c i ?d e ld i b u i x ,r e s o l uc i ?d ep r o b l e m e se ne

47、 l sp l a n sd ec o n s t r u c c i ?a b a n sd el ac o n s t r uc c i ? .8 . 2 . 3o b t i n g u t sd e l sp r o p ie t a r i sd es u b s u p e r f i c i a li n f o r m ac i ?o c u l t aid u rat e r m ei n v e s t ig a c i o n se x t e n sal ac o m u n i t a t ,sa b e rl e s t a td ec a n o n a d e

48、ss u b t e rr ? n i e s .8 . 2 . 4p r e p a r a ra n ? l i s ided a d e s ,d i v i s i ?d o b r e sia n ? l is i .8 . 2 . 5f a s ed i m p l e m e n t a c i ?dep r e p a r a c i ?d ec o n s t r u c c i ?o r g an i t z a c i ?d i s s e n yid e s p r ? sd el as e v aa p r o v a c i ? ,c o n s t r u c c

49、 i ?a p ar t a td eg u i ad ep r o g r a m a c i ? .8 . 2. 6o r g a n i t z a c i ?t ? c n i c si n s t r u c ci o n s ,f e rf a m i l i a r i t z a d e sa m bl as i t u a c i ?p e r s o n a l ,e n t e n d r el ai n t e n c i ?d ed i s s e n y ,M ? s t e re s p ec i f i c a c i o n sin o r m e st ?

50、c n i q u e sim ? t o d e sd ec o n s t r u c c i ? .S e rc o ns c i e n t sd e l sd u r a n tl ac o n s t r u c ci ? .8 . 2 . 7m a t e r i a le s t a d ? s t i c ,co m p o n e n t se nu n am a n e r ao p o r t u n a,e lp r o c e s s a m e n tq u a n t i t a t ,e s pe c i f i c a c i o n sih o r a r

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