Download - CT tutorial 2 presentation
CONSTRUCTION TECHNOLOGY\ CHAI JIA ERN 0324653 \ NA YONG YI 0324458 \\ TEE WAN NEE 0325074 \
ISSUES TO BE TAKEN INTO CONSIDERATION
BEFORE CONSTRUCTION
ACCESSIBILITY TO SITE SERVICE
WATER TABLE SITE CLEARANCE
SITE INVESTIGATION
SUBSOILS
ACCESSIBILITY TO SITE- Consideration on how the
vehicles will enter and exit the site.
- Condition of road
- If no suitable accessibility, temporary site is needed.
- Knows the building around the construction site
- To reduce disturbance to the resident ( noise )
- To guarantee the safety of resident
SITE INVESTIGATE
SERVICES- Is there any underground
service ?- Electricity cables, water
pipes, sewers
- SOLUTION ;- Locate the pipes and
cables
WATER TABLE- The level below which the
ground is saturated with water- Ground water pressure equals
to atmospheric pressure
- IMPACT ON CONSTRUCTION OF A HIGH WATER TABLE ;
- Extra costs to increase trench support
- Presence of chemical such as acid can lead to damage of foundation and other materials used below the ground level
SUBSOIL- Determine whether the type of subsoil is suitable for the construction
SANDGRAVEL
HARD ROCK CLAYGravel : Ideal subsoil, strong and easily drained
Sand : Loose, subject to movement
Hard Rock : Good foundation, High excavation cost
Clay : Good bearing capacity, does not drain well
SITE CLEARANCE- Removing existing
structure on the construction site
- Removing shrubs and trees
- Remove soil to reduce level
Bulldozer : equipped with a blade used to push large quantities of materials
[Rear] : claw-like device (ripper) to loosen densely compacted materials
Stump Grinder : power equipment attachment that remove tree stumps
Rotating cutting disk that chips away wood
TEMPORARY WORKS Part of construction project that are needed to enable the permanent works
to be built
A) ACCOMODATION FOR WORKERS B) SECURITY C)SCAFFOLDING D) TIMBERING
TEMPORARY WORKSPart of construction project that are needed to enable the permanent works to be built
• Site office• Site accommodation• Site toilet• Material storage• Guard house • Hoarding
SECURITY- FENCE AND LOCK- LIGHTING- ALARMS & SECURITY GUARDS- CCTV
FENCE & LOCK- Surrounded the whole
construction site- Offer a clear indication to any
outsiders that the area within is strictly off limits.
.LIGHTING- Large, open and outdoor- Due to these sites seldom
have sufficient lighting - To prevent criminals from
being able to operate in shadow.
.
ALARMS & SECURITY GUARD
Install a silent alarm which is designed to contact authorities directly, without giving the intruder any indication that an alarm has been triggered. For elaborate
- Image can be recorded or monitored live
- On site or remotely
CCTV
- Install a silent alarm- 24-hour manned guarding
- There are a variety of CCTV systems available to deter criminals. Image can be recorded or monitored live, either on site or remotely. ELABORATE
SCAFFOLDINGA temporary structure on the outside of the building, used by workers to climb up the building to work
Putlog Scaffold
TIMBERING
Trenches in Firm Soil
Trenches in Bad Soil Trenches in Loose Soil - When ground is so bad that it will not stand to a
vertical surface when poling board is inserted- Should the looseness of the soil supports being
fixed at closer intervals than 6 feet. - Timbering a trench in firm ground, in which case
short deal and batten “ends”.
- Temporary supports to sides of excavations.
- Planking & Strutting
https://www.youtube.com/watch?v=cFYkeT0Yk6k
Timbering of
trenches
STAY BRACING
VERTICAL SHEETING BOX
SHEETING
RUNNER SYSTEM
SHEET PILING