Microsoft Word - KSR2012A029.doc

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1 YWXY º º t rzyywxyhwy` ƒqh ƒ A Study on the Applicability of High-Performance Piles on Railway Bridges Õ ã äõ ãã äõôø ããã Il Tae Kim *, Seong Ryong Kim **, Myung Min Kim *** Abstract In the construction industry which includes the fields of civil engineering and architecture, steel pipe piles and PHC piles are the most commonly used type. Among the two, steel pipe piles have been mostly used because of its structural performance and constructability. For the raw material steel, we depend entirely on imports. However, high construction costs caused by increasing steel price, have resulted in less use of steel in construction. In contrast, PHC piles have excellent cost benefits but it is also restricted in large horizontal forces acting Structures. Therefore, the composite piles have been used recently which combine both the structural performance of steel pipe piles and the economic feasibility of PHC piles. In conclusion, the aim of this research is to study the characteristics of high-performance piles as the composite piles have shown the increased demand recently, and to study on the applicability of it on railway bridges. Keywords : Steel pipe pile, PHC pile, Composite pile, DEX(Dongbu head Extended) pile, Highperformance pile ï szžv zžp³ ƒˆ ƒ m qh ¹ qh ª qh qh ƒ vˆ ƒ q p p k m ƒzž ƒ Ÿ ˆ v mª qh ƒr ƒi p ³l ª ƒ Ž kƒ qh ƒª qh ƒ y qh w ekƒy ƒ y qh ƒqh šd ³y k ƒ qh ª qh y qh ƒ º ¹qh ƒqh ää ï szžv zžp³ ƒˆ ƒ v m qh m qh ª qhd qh v ¼ Ž ¹ ƒ r Žƒ y ˆ ƒ ˆ ³p q pqh mƒ l z p k m pª ˆ«mƒqh ˆ Ò åã ãà òóó ãéêéëêåäæêéêêéêêäêéëã ãã Ó ãñáð úü ø ã ãããã ãà òõó

d ½ ƒ ª qh zž tm k ƒ ½ m Ž Ž qh ƒq k p v ¼ Ž ƒ ³l q vƒ ƒ

¹qhd ƒqh ƒ ääõà òê Ï äääú òê y qh k z qh z ª qh m ƒqh k q

äääääñ øùø à Ï y qh ª qh wx ekª ˆ ˆ y ˆ ƒ m ˆ ƒª qh ƒ ƒ ƒ

2 d ½ ƒ ª qh zž tm k ƒ ½ m Ž Ž qh ƒq k p v ¼ Ž ƒ ³l q vƒ ƒ kƒ qh ª qh šd y qh qh ƒ zpº qh ƒ l ˆ zz ƒ s qh ½x ƒ p ƒ º ¹qhd ƒqh ƒ ääõà òê Ï äääú òê y qh k z qh z ª qh m ƒqh k q p ª p ºˆ«qh y qh ª qh ƒ d rƒ ƒ pqh Ž ƒ ƒ ºy l Ž z ª qh p äääääñ øùø à Ï y qh ª qh wx ekª ˆ ˆ y ˆ ƒ m ˆ ƒª qh ƒ ƒ ƒ ª qh º wˆ r ˆ ª qh wˆ p p my ˆ l p ª qh ˆ» ª qh y p º wˆ 압축실험강관말뚝상부좌굴 4 점재하휨실험 PHC 말뚝파단 Fig. 1 복합말뚝의압축및휨실험과파괴형상 y qh ƒ ³ p Ž v¼ ˆ Ž ˆ ƒ qh m ±vƒ¼ˆ ƒ ª qh ±vƒ g ƒ ƒª qh l x p Ž m

lum º ƒ p ƒ v l «Ž v l ƒ l rp l m rp l l

l ºˆ y lumƒ r «m v l «qh p ˆ«ƒ qh p ˆ«qh

3 äääääø Ñøù y qh ƒ vˆ wx Fig. 2 p ª p «ƒ ¹ vv qhˆ m qhˆ rx pqh pºy «ˆª qh ƒ ± pw»q wˆ m pzd «äää á ÏÑòêãææèçêêéã ƒ º ¹qh qh ƒ zpº v ƒ l ˆ qh l º m qh v mqhƒ ˆ v l ª ª l qh y l zˆp l k Ž ª Ž ª v qh ª v z v d v l qhy j lum º ƒ p ƒ v l «Ž v l ƒ l rp l m rp l l zºˆƒ m «zž q ¹ˆ v qhƒ vˆ ˆ qhƒ Ž q g m ƒ l ºˆ y lumƒ r «m v l «qh p ˆ«ƒ qh p ˆ«qh ep ª ªp v k d º «m p qh ƒ D]`Y D ª ë ª ë Fig. 2 복합말뚝의생산및시공과정 ( 일체형복합말뚝 ) 89LD]`Y D ³À ³À i 1 ³À 15lBl5d uœ m ƒ ne o D]`Y 89LD]`Y Fig. 3 선단확장형강관말뚝설계개념도

äääääø à Ï ƒ º ¹ qh ƒ ek qh y «ªª «ªª d x m ƒƒ ƒž ˆ Ž qh š s p ƒ º m qh y ˆr

4 선단확장형강관말뚝의성능시험 py ƒ º l ˆ º z v± q Ž äääääø Ñøù ƒ º ¹qh z ƒ ƒ np µƒ ƒ wˆ m

äääü Ï ƒ zƒ m «¹ ª«ª yƒ Â¹ ª«ª yƒ ªª ªª yƒ ƒ r qh z qh px mƒ äääñ þü äääääòá

4 äääääø à Ï ƒ º ¹ qh ƒ ek qh y «ªª «ªª d x m ƒƒ ƒž ˆ Ž qh š s p ƒ º m qh y ˆr ³ k qh y p um ep vv p ƒ º ¹qh qh ƒ rfig. 4 ƒ º z Ž ˆ Ž Fig. 4 선단확장형강관말뚝의성능시험 py ƒ º l ˆ º z v± q Ž äääääø Ñøù ƒ º ¹qh z ƒ ƒ np µƒ ƒ wˆ m r n z qm p ƒ ˆ wx y qh wxp Ž g Ž ƒ º ¹qh ƒ º m ˆ ƒ vqh f et»q wˆ m rzd «ääñü äääü Ï ƒ zƒ m «¹ ª«ª yƒ Â¹ ª«ª yƒ ªª ªª yƒ ƒ r qh z qh px mƒ äääñ þü äääääòá Table 1 말뚝설계에사용된설계조건 설계조건 지반근입깊이말뚝선단 N 치말뚝중앙부 N 치말뚝머리 N 치말뚝시공 특성치 1.0D( 연암지지 ) 내부굴착말뚝

5 qh ³l q vƒ rqh l x w um ª qh ƒ º ¹qh ƒ ƒ ˆ Table 2 교대말뚝공사비 ( 자재비 ) 비교 교대높이 (m) 말뚝길이 (m) 강관말뚝 (Ф508x12t) 복합말뚝 (Ф500x12t) 본수 (EA) 본당공사비총금액 ( 원 ) 본수 (EA) 본당공사비총금액 ( 원 ) 8A ,695,540 59,343, ,644,120 57,544,200 8A ,571, ,987, ,346,020 82,110,700 10A ,695,540 81,385, ,644,120 78,917,760 10A ,571, ,411, ,346, ,608,960 12A ,695, ,514, ,644, ,223,680 12A ,571, ,549, ,346, ,145,280 äääääòï qh ƒ ³l m m y ª q h l w umqh y qh ª qh «ª p Table 3 교각말뚝공사비 ( 자재비 ) 비교 (1) 경간장 (m) 말뚝길이 (m) 강관말뚝 (Ф508x9t) 복합말뚝 (Ф500x9t) 본수 (EA) 본당공사비총금액 ( 원 ) 본수 (EA) 본당공사비총금액 ( 원 ) 25P ,279,740 61,427, ,429,950 68,637,600 25P ,739, ,495, ,870,900 89,803,200 30P ,279,740 61,427, ,429,950 68,637,600 30P ,739, ,495, ,870,900 89,803,200 35P ,279,740 71,665, ,429,950 80,077,200 35P ,739, ,326, ,870, ,737,600 경간장 (m) 말뚝길이 (m) PHC 말뚝 (Ф600x90t) DEX PILE(Ф457x9t) 본수 (EA) 본당공사비총금액 ( 원 ) 본수 (EA) 본당공사비총금액 ( 원 ) 25P ,630 33,987, ,194,750 50,179,500 25P ,603,260 78,559, ,403, ,938,600 30P ,630 33,987, ,194,750 50,179,500 30P ,603,260 89,782, ,403, ,938,600 35P ,630 38,843, ,194,750 58,542,750 35P ,603, ,005, ,403, ,761,700 Table 4 교각말뚝공사비 ( 기초 ) 비교 (2) 강관말뚝 (Ф508x9t) 복합말뚝 (Ф500x9t) PHC말뚝 (Ф600x90t) DEX PILE(Ф457x9t) 25P10 41,499,375 41,499,375 50,114,175 41,499,375 25P20 41,499,375 41,499,375 50,114,175 41,499,375 30P10 55,100,175 55,100,175 56,244,825 55,100,175 30P20 55,100,175 55,100,175 60,560,625 55,100,175 35P10 59,264,175 59,264,175 69,632,625 59,264,175 35P20 59,264,175 59,264,175 77,720,025 59,264,175

6 Table 5 교각말뚝공사비 ( 합계 ) 비교 (3) 강관말뚝 (Ф508x9t) 복합말뚝 (Ф500x9t) PHC말뚝 (Ф600x90t) DEX PILE(Ф457x9t) 25P10 102,926,895 (100%) 110,136,975 (107%) 84,102,045 (82%) 91,678,875 (89%) 25P20 172,994,415 (100%) 131,302,575 (76%) 128,673,915 (74%) 142,437,975 (82%) 30P10 116,527,695 (100%) 123,737,775 (106%) 90,232,695 (77%) 105,279,675 (90%) 30P20 186,595,215 (100%) 144,903,375 (78%) 150,343,185 (81%) 156,038,775 (84%) 35P10 130,929,615 (100%) 139,341,375 (106%) 108,475,905 (83%) 117,806,925 (90%) 35P20 234,590,895 (100%) 179,001,775 (76%) 178,725,405 (76%) 177,025,875 (75%) äää Ñ ƒ v y qh qh ƒ qh p ƒ ºy ƒ š qh ª qh r qh eky qh ƒ º ¹qhdƒqh ƒ º y Ž (a) 교대 (b) 교각 Fig. 5 구조물별말뚝공사비상대비교 ääñï y qh k m qh z½ l m±r ƒy qh qh š ˆ ½ Ž qh z½ y qh ƒ º ¹ qhdƒqh ª qh ƒ d ƒ l um zƒ qh opƒ vk ± ƒ º ¹qh qhy p l v ŽŽ r z m ª qh zkod l r ƒ m±

7 k ƒqh v v ek Ÿ p z½ l umrv½» ƒ ± Ž r y qh ƒ qh v ¹ «ƒqh ƒzƒ»ž Õ y t ƒ tˆ r m ˆ ƒ p ± z «ƒ yƒ ƒp ƒ zd dp

Microsoft Word - KSR2012A103.doc

Microsoft Word - KSR2012A103.doc YWXY º º t rzyywxyhxwz ¼ ƒx p y v ³ Evaluation on Long-Term Behavior of Reinforced Railroad Subgrade with Bending Stiffness Wall Õá ã äõ ã äø ãã äø ãã Dae-Sang Kim *, Ung-Jin Kim *, Jong-Sik Park *, Seong-yong