The New Technique and Application of Pile-cap Treatment on DH-PHC pile

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Debra Lyons
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1 DH-PHC ½ { ( ) 2 ( ) 3 ()!"#$%$ 4 ()!&' o DH-PHC j DH-PHC DH-PHC The New Technique and Application of Pile-cap Treatment on DH-PHC pile CHANG Chia Chyi 1, LIU Wen Tsung 1, HUANG Han Tsung 2, LI Sheng Nan 3, SHI Kuai Yi 4 1 Associate Professor, Department of Civil Engineering, Kao Yuan University (Taiwan) 2 Deputy Section Chief of Civil & Structural Department, Fu-Tai Engineering Co. (Taiwan) 3 Chief Director, YiBen Valve Co. (China) 4 Chairman, YiBen Valve Co. (China) ABSTRACT There are many shortcoming and instability situation on pile-cap treatment of traditional driven pre-stressed concrete pile. With newly developed techniques of hollow pile-cap and horizontal shear-friction reinforcement on pile head, DH-PHC pile can reduce the constructing time & cost of pile-cap treatment, pile head soil discarding. In addition, with the shear-friction reinforcement in the hollow pile-cap, DH-PHC pile increase the tensile capacity of pile-cap, transfer lots work of site construction to the factory of high stability. DH-PHC pile is better than traditional pile, DH-PHC is cheaper on total-cost, more safe and stability, stronger in tensile capacity of pile-cap. But also DH-PHC can extend the development of products for other pile applications. KEYWORD: driven pile, pile-cap treatment, DH-PHC, hollow pile-cap, shear-friction reinforcement p. 1

2 Ò PC PHC Ó» ˆ j v ~ w ˆ ˆ z } PC k j ˆ½ j ± p h ± z z j j ± Òh ~ j Ó ˆ / u» š j r ˆ x j v Ò» v Ó [1][2][3] Ò [4]Ó DH-PHC } ˆv v u DH-PHC u (pre-stressed concrete pile PC ) (RC ) ˆ Ò v Ó ˆ ½ ( š ) mƒ ƒ ˆ j v ˆ j µ œ j z š» p. 2

3 p» ~ w } ( ƒ ) ( ) p (1) (2) Š ~ Š ~ «f w j ƒ ä Š å i (3) 1 [5] k v š Š u» ˆ j j 1 ( ) ž [5] ž (PS) db(a) 1.2 t 129 ( ) t 138 e ( ) t 128 ( ) e ( ) ( ) 130 ( ) 135 ( )» ~» š ½ [6]» v DH 3.1 DH p DH p 1 p. 3

4 7û2 7 2(/0 J³ 7 3eC ¹ðÚ DH. 89²Ë: M!("# 67$ dd.]>>^( #. l: e 71 DH Cû2 p. 4

5 72 DH û2 73 DH ³ p. 5

6 3.2» z š ˆ» 1988 [7]» ž ( 2000 ) Š «± j» v Ò AG v ) { DH (1) (RC ) kg/cm 2 (PC ) 500 kg/cm 2 (PHC ) 800 kg/cm 2 [8] (2) ƒ(pc wire) ƒ(cns 3332 G3073 ƒ ƒ CNS 9272 ) ƒ 12,500 kg/cm 2 14,500 kg/cm 2 (3) (CNS 560 A2006 ASTM A615) v ASTM A36 ˆ 4 DH ( 4 ƒ ) z ¼ 5 DH DH DH k (1) (2) (½ ) (3) DH p DH œ z ( ) 3.3 DH j DH ¼p 6 u j DH z j v v p. 6

7 7 4 ()O 75 [9] DH 67$wU¼U[8] p. 7

8 76 DH í J]>>Ö Û[9] ²Ë.%&]M( Bù.¼U'7 7 N(u JYZ fø X JST67(Ma í n ÈgA ; hjiye*7 8. Û /(êëw Hj?YÆ DH í :à$ a.z hk edh 89 ( l W 1E~ Gí ma45 n n Èq±.n (æ² > c d úx1e~ G(UB úx O%&DV OV. oúe p. 8

$]>bcd4>#@ae 7 7 B¼U 7 8 Z h. Û ' DH () *+ *\>c d# q/02. '( >?$ ËÌ ]>@( ¼U³( g Ò$ rs»te ù( n È Ø)* :à. E/0.uv~ G#ST67 Ð he.z * :àð hâ (;Ø.

9 ;a úx ;.:p ÏVL(Oúx>c d>^.ïð(<=>?]>^ # >M;e BC OØë*/0.ºU( cùú.]>bcd4>#@ae 7 7 B¼U 7 8 Z h. Û ' DH () *+ *\>c d# q/02. '( >?ËÌ ]>@( ¼U³( g Ò$ rs»te ù( n È Ø)* :à. E/0.uv~ G#ST67 Ð he.z * :àð hâ (;Ø.Z hk e :à.1e67~ G( gæw(mxø3 y a(w 123. hea ¹ z{z ( :à.1e67~ G/ Ð uv}(r~ G~ ù() (uv.nô($â\ ~ n ( Ö. mögí ma.45 e p. 9

10 » (2007) [10] j h ( ASD method) PHC ± ( 210 kg/cm 2 œ ) j fs = 3.2 kg/cm 2 * 0.6 = 2.0 kg/cm 2 ( 1) j fs = 2.0 kg/cm 2 * 4 / 3 = 2.6 kg/cm 2 ( 33%) DH-PHC v (U.S.D. ) v DH ~ µ p z Ò p Ó Ò Ó [4] Vu = Φ*A vf *F y *μ ( 2) Vu Φ*0.2*fc *Ac ( 3) Vu Φ*56*Ac ( 4) μ = 1.0*λ ( œ ) 0.6*λ ( œ ) λ = 1.0 ( ) Φ : Φ=0.75 [11] A vf : (cm 2 ) F y : (kg/cm 2 ) 4,200 kg/cm 2 μ : ( 2) p (4-25) œ μ = 0.6*λ œ Ò p cm œ Ó μ = 1.0*λ } Ò 4Ó DH j DH º DH º w ˆt p p e 2 3 DH j j g DH u p. 10

11 œ ˆ ˆ š ˆv } º 2 DH j DH x ˆ m z ( ) L p. 11 ½ } «½ j ˆ œ ˆ L 3 DH j DH x n x ˆ x 2. x ~ *2 D tons (U.S.D. ) k z m x ˆ x

DH 3» DH ² Ÿ DH p DH DH š j ˆ œ j» Φ400 700mm kφ800mm kφ1,400mm Ò 9Ó z 9 [4] DH-PHC ½ ½ PHC DH-PHC k Ò z Ó DH-PHC ˆ ~ d y

12 DH 3» DH ² Ÿ DH p DH DH š j ˆ œ j» Φ mm kφ800mm kφ1,400mm Ò 9Ó z 9 [4] DH-PHC ½ ½ PHC DH-PHC k Ò z Ó DH-PHC ˆ ~ d y ž k [1] ± (2011) Ü v ÝDGJ32/TJ v ± ( w [2] (2011) Ü v Ý ( w p. 12

13 [3]»(2010) v ˆ v ( w [4] (2011) ( w [5] š (2011)» [6] (2008) v v wwww.concrete365.com ( w [7] (1995) ˆv 52 pp.27 36» [8] (2010)» [9] j (2008) PHC PILE» [10] (2007) PHC (A1-14)» [11] (2011) p 2.3.2» p. 13

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