SUNEX더 나은 삶을 추구하는 지반기술

질문답변

가설해체시 의문점(현대 2002-422) 2006-03-31

지하철 가설 공사 해체 해석에서의 문의사항입니다.

아래의 input으로 해석한 결과를 보면,
step 29, 30, 31(버팀보 5,4단 제거 및 슬라브시공 단계)에서
벽체에 작용하는 전단력과 모멘트가 최종굴착 때까지의 최대값과
비교하여 2배 및 그 이상의 값을 가지며
3단 버팀보 (GL -6m)에도 비정상적으로 큰 값의 축력이 작용합니다.

이 해석의 결과를 sunex상에서 해체시 벽체를 합벽으로 해석함에 따라서
생기는 값으로 무시해도 되는 것인지, 아니면 해석에 문제가 없으므로
해체단계를 재고해야하는 것인지 고민이 되어 문의드립니다.
(사실, 해체 시공 순서 변경은 어려운 상황입니다만..)

버팀보 축력이야 커도 상관없지만 벽체의 전단력과 모멘트는 상당히
거북스럽군요.. 빠른 답변 부탁드립니다..

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PROJECT 해체검토

SOIL 1 풍화토
13.3 1.9 1 1 33 3000 -1 0
2 풍화암
17.4 2 1.1 3 35 5000 -1 0
3 연암
19.4 2.1 1.2 5 35 6000 -1 0
4 경암
50 2.2 1.3 10 40 8000 0 0

PROFILE 1 13.3 1 1
2 17.4 2 2
3 19.4 3 3
4 50 4 4

VWALL 1 42.2 0.01348 0.000215 2.1E+07 1.5 0 0 0

STRUT 1 0.7 0.02355 21.2 2 0 0 0 0
2 3 0.01574 21.2 2.2 5 0 0 0
3 6 0.01574 21.2 2.2 5 0 0 0
4 9 0.01574 21.2 2.2 5 0 0 0
5 12 0.01574 21.2 2.2 5 0 0 0
6 14.8 0.01574 21.2 2.2 5 0 0 0
7 17.3 0.01574 21.2 2.2 5 0 0 0
8 20 0.01574 21.2 2.5 5 0 0 0
9 22.4 0.01574 21.2 2.5 5 0 0 0

ANCHOR 1 23.9 0.001013 5 0.1 1.5 0 0 0
2 25.4 0.001013 5 0.1 1.5 0 0 0
3 26.9 0.001013 5 0.1 1.5 0 0 0
4 28.4 0.001013 5 0.1 1.5 0 0 0
5 29.9 0.001013 5 0.1 1.5 0 0 0
6 31.4 0.001013 5 0.1 1.5 0 0 0
7 32.9 0.001013 5 0.1 1.5 0 0 0
8 34.4 0.001013 5 0.1 1.5 0 0 0
9 35.9 0.001013 5 0.1 1.5 0 0 0
10 37.4 0.001013 5 0.1 1.5 0 0 0
11 38.9 0.001013 5 0.1 1.5 0 0 0
12 40.4 0.001013 5 0.1 1.5 0 0 0

SLAB 1 38.33 2.57 21.1 0
2 31.44 0.8 21.1 0
3 22.07 0.6 21.1 0
4 14.67 0.6 21.1 0
5 6.47 1.2 21.1 0

WALL 1 31.44 38.33 1.8 0
2 22.07 31.44 1.6 0
3 14.67 22.07 1.4 0
4 11.9 14.67 1.2 0
5 6.47 11.9 1.2 0

Division 0.1
Solution 0
Output 1

STEP 1 excavation to 1.2
iteration 10 0.5
rankine 1.0 0.0 30
surcharge 1.0
water-pressure 1.0 0.0 1.2 0.2 1.2 0.2
excavation 1.2

STEP 2 strut 1 and excavation to 3.5
const strut 1
water-pressure 1.0 0.0 3.5 2.5 3.5 2.5
excavation 3.5

STEP 3 strut 2 and excavation to 6.5
const strut 2
water-pressure 1.0 0.0 6.5 5.5 6.5 5.5
excavation 6.5

STEP 4 strut 3 and excavation to 9.5
const strut 3
water-pressure 1.0 0.0 9.5 8.5 9.5 8.5
excavation 9.5

STEP 5 strut 4 and excavation to 12.5
const strut 4
water-pressure 1.0 0.0 12.5 11.5 12.5 11.5
excavation 12.5

STEP 6 strut 5 and excavation to 15.3
const strut 5
water-pressure 1.0 0.0 13.1 12.1 14.1 0.0
excavation 15.3

STEP 7 strut 6 and excavation to 17.8
const strut 6
excavation 17.8

STEP 8 strut 7 and excavation to 20.5
const strut 7
excavation 20.5

STEP 9 strut 8 and excavation to 22.9
const strut 8
excavation 22.9

STEP 10 strut 9 and excavation to 24.4
const strut 9
excavation 24.4

STEP 11 anchor 1 and excavation to 25.9
const anchor 1
excavation 25.9

STEP 12 anchor 2 and excavation to 27.4
const anchor 2
excavation 27.4

STEP 13 anchor 3 and excavation to 28.9
const anchor 3
excavation 28.9

STEP 14 anchor 4 and excavation to 30.4
const anchor 4
excavation 30.4

STEP 15 anchor 5 and excavation to 31.9
const anchor 5
excavation 31.9

STEP 16 anchor 6 and excavation to 33.4
const anchor 6
excavation 33.4

STEP 17 anchor 7 and excavation to 34.9
const anchor 7
excavation 34.9

STEP 18 anchor 8 and excavation to 36.4
const anchor 8
excavation 36.4

STEP 19 anchor 9 and excavation to 37.9
const anchor 9
excavation 37.9

STEP 20 anchor 10 and excavation to 39.4
const anchor 10
excavation 39.4

STEP 21 anchor 11 and excavation to 40.9
const anchor 11
excavation 40.9

STEP 22 anchor 12
const anchor 12
ground settlement
insertion check

STEP 23 const slab 1 @ bottom
const slab 1

STEP 24 const slab 2 & wall 1
const slab 2
const wall 1

STEP 25 remove strut 9
remove strut 9

STEP 26 const slab 3 & wall 2
const slab 3
const wall 2

STEP 27 remove strut 8 7 6
remove strut 8
remove strut 7
remove strut 6

STEP 28 const slab 4 & wall 3
const slab 4
const wall 3

STEP 29 remove strut 5
remove strut 5

STEP 30 remove strut 4 & wall 4
remove strut 4
const wall 4

STEP 31 const slab 5 & wall 5
const slab 5
const wall 5

STEP 32 remove strut 3
remove strut 3

STEP 33 backfill to topslab & remove strut 1
fill 0 0 0.7 1
remove strut 1


END

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