표제지
목차
Abstract 9
I. 서론 12
II. 연구사 14
III. 재료 및 실험방법 25
3.1. 현장시험 위치 및 지반 특성 25
3.2. 현장재하 시험방법 30
3.3. 허용지지력의 산정방법 35
IV. 결과 및 고찰 38
4.1. 허용지지력 산정 결과 38
4.2. 지지력 비에 의한 보강효과 분석 42
4.3. 보강재별 복토시 지반 융기현상 고찰 45
V. 결론 46
참고문헌 48
Table 3.1. Physical properties of site tested 27
Table 3.2. Undrained shear strength(Cu) of sites tested 27
Table 3.3. Test equipments 30
Table 3.4. Applied loads with machines and surcharge steps 33
Table 3.5. Test condition with cases 34
Table 3.6./Table 3.8. Evaluation of allowable bearing capacity (이상덕, 1998) 36
Table 3.7./Table 3.9. Evaluation of allowable bearing capacity(일본토질공학회, 1993) 36
Table 3.8./Table 3.10. Evaluation of allowable bearing capacity (김석근, 2001) 36
Table 4.1. Results of Large-scale plate load tests 39
Table 4.2. Normalization of allowable bearing capacity 41
Table 4.3. The results og bearing capacity ratio 43
Figure 2.1. Failure of geotextile and behavior of underground soil dredged 14
Figure 2.2. Drop down of construction machine 15
Figure 2.3. Run-off of dredged soil 15
Figure 2.4. Drop-down of construction machine during spreading sand mat 16
Figure 2.5. Drop-down of construction machine during piling vertical drain 16
Figure 2.6. Unleveled spreading of fill materials and falling down of construction machine 17
Figure 2.7. Diagrams of bamboo mat method 20
Figure 2.8. Bamboo mat on the water 23
Figure 2.9. Jointing work of bamboo mats on the water 23
Figure 2.10. Jointing work of bamboo mats in the land 24
Figure 2.11. Spreading of P.P. mat on the bamboo mat 24
Figure 3.1. Location map 26
Figure 3.2. A plan view of Large-scale plate load test 26
Figure 3.3. Results of in-situ vane test (P.P. mat zone) 28
Figure 3.4. Results of in-situ vane test (bamboo mat zone, Grid type : 1.25m×1.25m) 29
Figure 3.5. Results of in-situ vane test (bamboo mat zone, Grid type : 1.0m×1.0m) 29
Figure 3.6. A diagram of large-scale plate load test equipments 31
Figure 3.7. A diagram of processes of large-scale plate load test 32
Figure 3.8. A diagram of processes of large-scale plate load test steps 35
Figure 4.1. Allowable bearing capacity with surcharges 40
Figure 4.2. BCR with test types 44
Figure 4.3. Amounts of rebound of surface during tests with test types 45