Bases and Foundations of Building Under Reconstruction de P.A. Konovalov

Bases and Foundations of Building Under Reconstruction

P.A. Konovalov

Translated from the Russian, this English edition of the text has been revised and updated. It covers such topics as: reasons for strengthening bases and foundations of buildings; behavioural features and foundations of in-service buildings; and stabilization of soils.

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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.