Bases and Foundations of Building Under Reconstruction

P.A. Konovalov (Author)

Preface -- 1. Reasons for Strengthening Bases and Foundations of Buildings -- 1. Deformations of In-service Buildings -- 2. Load Increase Due to Building Additional Storey and Reconstruction -- 3. Standardising Stress Intensity on Foundation Soils -- 2. Condition of Bases and Foundations of Buildings under Reconstruction -- 1. Effect of Service Period of Buildings on Deterioration of Foundations -- 2. Design Parameters of Foundations -- 3. Changes in Stress on Foundation Soils after Reconstruction of Buildings -- 4. Utilisation of Reserve Bearing Capacity of Foundations in Reconstructions -- 5. Experience in Prescribing Permissible Stress on Foundation Soils after Reconstruction -- 3. Behavioural Features of Foundations of In-Service Buildings -- 1. Nature of Soil Reinforcement -- 2. Depth of Compressible Layer of Base -- 3. Variation in Moisture Regime of Soil and Water Table -- 4. Consolidation of Foundation Soils under Load -- 5. Effect of Long-term Loads on Mechanical Properties of Foundation Soils -- 4. Engineering-Geological Investigations and Inspections of Foundations of Reconstructed Buildings -- 1. Engineering-Geological Investigations -- 2. Investigation of Foundation Soils -- 3. Inspection of Foundations -- 4. Summary of Technical Feasibility of Reconstructing Buildings with Increased Loads -- 5. Designing Bases and Foundations of Buildings under Reconstruction -- 1. Sequence of Works while Designing Bases and Foundations -- 2. Summation of Loads for Computation of Foundations -- 3. Determination of Allowable Stress on Foundation Soils Compressed under Long-term Loading Conditions -- 4. Verification of Foundation Strength -- 5. Design of Bases According to Ultimate State -- 6. Reinforcement of Foundations on Natural Base -- 1. Strengthening Foundations -- 2. Increasing Foundation Bearing Area -- 3. Deepening Foundations: Underpinning Columns of a New Foundation -- 4. Construction of Foundation Mats under a Building -- 5. Introduction of Additional Supports -- 7. Utilization of Piles for Reinforcing Foundations -- 1. Behaviour of Cast-in-situ Piles under the Building -- 2. Reinforcing Foundations with Driven Piles -- 3. Bored Jet Grout Piles -- 4. Slot Foundations -- 5. Partial Replacement of Pile Foundations -- 8. Stabilisation of Soils -- 1. Cementation -- 2. Silicification -- 3. Electrochemical Stabilisation -- 4. Thermal Stabilisation -- 5. Strengthening and Lifting Deformed Foundations by High����pressure Jet Grouting -- 6. Jet Grouting: Applications -- 9. Special Features of Construction Operations Related to Substructure Works to be Carried out under Reconstruction -- 1. Effective Methods of Destroying Old Foundations -- 2. Methods for Restoration of Waterproofing -- 3. Installation of Piles and Sheet Piles Adjacent to Structures in Service -- 4. Deepening Underground Facilities of Buildings -- 5. Construction Works for Lowering Water Table and for Water Drainage -- 6. Safety Regulations in Reconstruction Works -- Conclusions -- References.