Building construction technology task

SCENARIO 1

Housing Development Company A has decided to construct four storey housing block with basement area for parking facility at Homagama and the contract has been awarded to Consultant Firm B to perform the necessary investigation and design the building. The sub soil investigation of that area is given below.

a)      Thickness of top soil layer – 200mm

b)     Filled soil layer below the top soil – Filled material is good for earth filling but compaction was not done satisfactorily

c)      Sandy gravel layer below the filled layer – 2.5m

d)     Water table – 3.5m

e)      Clay gavel layer below the sandy gravel – 3.0m

Spot levels at external and internal grids of the proposed building have been taken and found that they are higher than the formation level by

0.750 m, 0.600 m, 0.800 m, 0.950 m and 1.050 m

TASK 1

1.1  Explain what are the factors to be considered when selecting a site at Homagama for this proposed housing complex

1.2  Explain the purpose of site investigation and describe briefly why it is necessary at the initial stage of the project

1.3  List out the necessary investigations to be carried out by the consultant B.

If the sub soil investigation is not been carried out for construction of two storey building on filled land, assess how it affects the construction once it is started

1.4  Give the boring methods for the sub soil investigation

Select and justify the applicable method for this housing project

1.5  Classify the soil for the purpose of building construction'

TASK 2

2.1  List out the types of foundations used in buildings

Justify the application of each types in buildings

Present the foundation type by drawing a diagram showing all necessary details for the construction and presenting the method of construction in writing all steps.

By considering the given borehole data, assess the foundation type for the above housing block. Student can use the appropriate data for any calculations if necessary.

2.2  Explain the earth work operation in building construction

Explain in detail the type of earth work operation are to be carried out in the above housing project by considering the given data

2.3  Describe the earth work support for excavation in foundation.

Provide necessary details of this earth work support made with class 11 timber for the trench of 1.5 wide and 2.5 m depth naming the essential timber members along with the standard dimensions

2.4  Explain briefly the construction of foundation of the above housing block commencing from site preparation stage

SCENARIO 2

Select any ongoing building construction site of your own choice as the case study. The building should be built with reinforced concrete and Brick or Block walls in super structure having floors more than two. Demonstrate the understanding of the building construction by performing the following tasks. You should submit all the observations and evidences collected (details of visited sites, letters from site in charges, photographs, structural drawing, etc) in the report as well as in oral examination.

You shall do a presentation for about 8 minutes on the given tasks.

TASK 3

3.1  Describe the types of formwork used in making RCC elements of buildings along with their supporting systems.

Select two formwork types in the selected construction site for constructing RCC elements and explain the way of constructing them at site. Give proposal for better improvements.

It is observed that, soffit of slab is with honeycomb in several areas. Describe how this problem is solved in future concrete operations

3.2  Explain the important factors to be considered when making reinforcement arrangement in structural element of the building.

Prepare the bar bending schedule for one slab in selected site present them in the standard format

3.3  Give the type of materials used for the construction of wall in your site.

Observe the construction of walls at site and give the relevant operations. Explain how the qualities of bricks or cement blocks were checked at site level.

3.4  Write method statement for construction of one brick thick wall in ground floor level.

3.5  Identify the types of finishes for walls and floors of buildings. Explain in detail the method of constructing floor tiles in bath room by giving the illustrations

3.6  Identify all the building elements which are to be waterproofed.

3.7  Explain the factors to be considered when selecting the timber for building construction.

Identify the covering materials for roofing in Sri Lanka