TAILIEUCHUNG - Strengthening soft soil for approach road after abutment by cement and fly ash

Approach road is an important structure of a bridge. Serviceability of a bridge is affected by the settlement of approach road, especially that on soft soil. One method that is usually applied for minimizing effect of settlement of approach road is to replace soft soil by hill soil. This method however may increase cost of projects in Mekong Delta area with a larger depth of soft soil. In this paper, soft soil strengthened by mixing it to cement and fly ash at different mix proportions was investigated. Test results from unconfined compression test and direct shear test of strengthened soft soil are compared to those of hill soil to determine the optimal mix proportion. Results showed that mixing 25kg cement and 75kg or 100kg fly ash to 1m3 soft soil increased its unconfined compressive strength and shear strength and are higher compared to those of hill soil. Strengthening in situ soft soil by using fly ash, industrial waste from thermal power plant, reduces cost of project and at the same time contributes to solving environmental problems. | Strengthening soft soil for approach road after abutment by cement and fly ash

• Kiến trúc - Xây dựng
• Soft soil
• Fly ash
• Unconfined compressive strength
• Shear strength
• Direct shear test
• Summary of doctoral dissertation
• The vacuum consolidation method for soft soil improvement in works construction
• Soft soil improvement in works construction
• Thickness of improved soft soil layer
• Soil cement columns
• Geometrical parameters
• Soft soil reinforced
• Mathematical diagrams of embankment stability
• Sand drains
• Equivalent plane strain solution
• Soft soil improvement
• Vertical drains
• Quality control
• Construction technologies for seadike
• Soft soil foundations
• Soft foundation
• Construction sea dikes
• Estuary dikes
• Summary of doctoral thesis
• The working of soil cement columns in combination
• High strength geogrid when dealing
• Soft ground in traffic construction
• Propose new calculation formulas
• Spun concrete pile
• Problems of soft soil
• Construction process
• The causes inclined piles
• Method determine the inclination
• Plane strain
• MeKong Delta
• Influence zone
• Mekong Delta soft soil conditions
• Transmission pipeline systems
• Pipeline construction methods
• Twin tunnel
• Surface settlement
• Analytical and numerical methods
• Constructing underground
• Maxwell model
• Geotextile encased stone column
• Viscoelastic behavior
• Construction works in Viet Nam
• trình bày báo cáo
• tài liệu báo cáo nghiện cứu khoa học
• cách trình bày báo cáo
• báo cáo ngành văn học
• báo cáo tiếng anh
• Characteristics of Quaternary sediments
• Relations to land subsidence
• West area of Hanoi
• Physicalmechanical properties
• Dissertation summary
• Soft soil layers
• Comparison of settlement between granular columns
• Without geosynthetic encasement
• Geosynthetic encased column
• The settlement of stone column
• Geosynthetic encased granular column
• Vertical stress
• Geosynthetic encasement
• Granular column reinforced
• Support pressures
• Dramatic growth
• Environmental degradation
• Tunnel construction
• Traffic congestion
• Lateral movement
• Pile group
• Soft soil
• FE analysis
• Lateral movement of pile group due to excavation