Page 19 - Building Regulation and Design Guidelines - Structural (Grey Code)

SECTION: 1 GEOTECHNICAL GUIDELINES & REGULATIONS SECTION: 1 GEOTECHNICAL GUIDELINES & REGULATIONS

- Surface manifestation.
- Lateral spreading or land sliding.
- Loss of bearing capacity for shallow foundation.
- Loss of lateral soil stiffness

1.4 SOIL IMPROVEMENT GUIDELINES
1.4.1 Soil liquefaction improvement techniques may be characterized as POUNDER
densification, drainage, reinforcement, mixing, replacement, Vibro
Compaction, Vibro replacement (Vibro Stone Columns), deep dynamic PATH # 2 1 2 1 2 1
compaction and compaction jet grouting.
WORK PLATFORM
• Wick drains, Fig. (1.16), are also an accepted technique whenever
a permanent dewatering is provided. However, the use of this COMPACTED SOIL LOOSE SOIL
technique should be evaluated with extreme caution.
• Fig. (1.17) Shows the method statement of the dynamic compaction FIRM BASE
and in Fig. (1.18) Comparison between dynamic and vibro
compaction is presented with respect to tip resistance along depth.
Fig. (1.17): Method Statement of Dynamic Compaction

DYNAMIC COMPACTION VIBRO COMPACTION

HYWARD
BAKER

0 5 10 15 20 25 30 0 0 5 10 15 20 25 30
0 2
2 4
4 6
6 8
8
10 10 12
12 14
14 16
16 18
18 20
20
Fig. (1.18): Comparison between Dynamic & Vibro Compaction
Fig. (1.16): Wick Drains Technique
36 37