Design of Raft Foundation

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Transcript of Design of Raft Foundation

Page 1: Design of Raft Foundation

Design of Raft Foundations - by: Dr. Hisham Arafat Mahdi For Students of Foundations' Project- Faculty of Engineering- Sixth of October University

Page 2: Design of Raft Foundation

Design of Raft Foundations - by: Dr. Hisham Arafat Mahdi For Students of Foundations' Project- Faculty of Engineering- Sixth of October University

Compare the maximum soil pressures with those calculated according to the net allowable capacity against soil failure and tolerable settlements (net allowable bearing capacity).

Page 3: Design of Raft Foundation

Design of Raft Foundations - by: Dr. Hisham Arafat Mahdi For Students of Foundations' Project- Faculty of Engineering- Sixth of October University

Page 4: Design of Raft Foundation

Design of Raft Foundations - by: Dr. Hisham Arafat Mahdi For Students of Foundations' Project- Faculty of Engineering- Sixth of October University

Page 5: Design of Raft Foundation

Design of Raft Foundations - by: Dr. Hisham Arafat Mahdi For Students of Foundations' Project- Faculty of Engineering- Sixth of October University

Page 6: Design of Raft Foundation

Design of Raft Foundations - by: Dr. Hisham Arafat Mahdi For Students of Foundations' Project- Faculty of Engineering- Sixth of October University

Page 7: Design of Raft Foundation

Design of Raft Foundations - by: Dr. Hisham Arafat Mahdi For Students of Foundations' Project- Faculty of Engineering- Sixth of October University

Page 8: Design of Raft Foundation

Design of Raft Foundations - by: Dr. Hisham Arafat Mahdi For Students of Foundations' Project- Faculty of Engineering- Sixth of October University

Page 9: Design of Raft Foundation

Design of Raft Foundations - by: Dr. Hisham Arafat Mahdi For Students of Foundations' Project- Faculty of Engineering- Sixth of October University

Page 10: Design of Raft Foundation

Design of Raft Foundations - by: Dr. Hisham Arafat Mahdi For Students of Foundations' Project- Faculty of Engineering- Sixth of October University

Page 11: Design of Raft Foundation

Design of Raft Foundations - by: Dr. Hisham Arafat Mahdi For Students of Foundations' Project- Faculty of Engineering- Sixth of October University

Page 12: Design of Raft Foundation

Design of Raft Foundations - by: Dr. Hisham Arafat Mahdi For Students of Foundations' Project- Faculty of Engineering- Sixth of October University

Page 13: Design of Raft Foundation

Design of Raft Foundations - by: Dr. Hisham Arafat Mahdi For Students of Foundations' Project- Faculty of Engineering- Sixth of October University

When designing the bottom reinforcement of the raft, the value at the face of the column shall be taken into account as shown in figure 12 below "section 1-1 and section 2-2". Accordingly, all moments represented by the moment contours inside the area of the columns should be disregarded.

Owing to the concentration of forces at the location of columns, it is crucial that the soil bearing capacity shall be checked using the conventional stress equation of Navier (equation 2) and not by the spring reactions determined from the computer output.