iscuss, evaluate and propose a suitable excavation and lateral support system(s) (ELS) for the basement construction.

Architectural Drafting and Design (MindTap Course List)
7th Edition
ISBN:9781285165738
Author:Alan Jefferis, David A. Madsen, David P. Madsen
Publisher:Alan Jefferis, David A. Madsen, David P. Madsen
Chapter14: Legal Descriptions And Site Plan Requirements
Section: Chapter Questions
Problem 14.33Q
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Discuss, evaluate and propose a suitable excavation and lateral support system(s) (ELS) for the
basement construction.

Project Information
Project Information
Project A
Project B
Height of building
25 floors, 78m high, with 2-level 40 floors, 124m high, with 3-
Basement (8m deep)
level Basement (10m deep)
Site Area
750 m?
1000 m?
Usage
Residential
Residential
Location
Urban area
Urban area
Surrounding condition
Site surrounded by new buildings Site surrounded by new and old
buildings
Terrain
2 levelled platform
2 levelled platform
Transcribed Image Text:Project Information Project Information Project A Project B Height of building 25 floors, 78m high, with 2-level 40 floors, 124m high, with 3- Basement (8m deep) level Basement (10m deep) Site Area 750 m? 1000 m? Usage Residential Residential Location Urban area Urban area Surrounding condition Site surrounded by new buildings Site surrounded by new and old buildings Terrain 2 levelled platform 2 levelled platform
Summary of Borehole Logs
Total core
Soil Description
Depth
Grade
recovery %
Start
Wash boring - no sample
6.5
Medium dense, brown, silty fine to course SAND with
a little fine gravel (FILL)
N=60 at 18.5
20.3
Medium dense, yellowish brown, slightly clayed silty
medium to fine SAND (RESIDUAL SOIL)
28.3
Extremely weak. Light pinkish grey & locally spotted
brown, completely decomposed, fine grained
|GRANITE, cobbles and occasional boulders of
weathered granite. Grade II/IV.
N=95 at 35.4
55
V
36.2
Moderately strong, pinkish grey, moderately
decomposed, fine grained GRANITE
38.3
85
III
Very weak, light pinkish grey & locally spotted brown, |N=150 at 45.40
completely decomposed, fine grained GRANITE (very
dense, silty medium to fine sand with a little fine
gravel).
60
V/IV
N>200 at 50.45
53.2
Weak, light pinkish grey & locally spotted brown,
Icompletelv decomposed fine grained GRANITE (very.
70
VI
Transcribed Image Text:Summary of Borehole Logs Total core Soil Description Depth Grade recovery % Start Wash boring - no sample 6.5 Medium dense, brown, silty fine to course SAND with a little fine gravel (FILL) N=60 at 18.5 20.3 Medium dense, yellowish brown, slightly clayed silty medium to fine SAND (RESIDUAL SOIL) 28.3 Extremely weak. Light pinkish grey & locally spotted brown, completely decomposed, fine grained |GRANITE, cobbles and occasional boulders of weathered granite. Grade II/IV. N=95 at 35.4 55 V 36.2 Moderately strong, pinkish grey, moderately decomposed, fine grained GRANITE 38.3 85 III Very weak, light pinkish grey & locally spotted brown, |N=150 at 45.40 completely decomposed, fine grained GRANITE (very dense, silty medium to fine sand with a little fine gravel). 60 V/IV N>200 at 50.45 53.2 Weak, light pinkish grey & locally spotted brown, Icompletelv decomposed fine grained GRANITE (very. 70 VI
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