Why is soil investigation important to the design of a foundation?

Why is soil investigation important to the design of a foundation?

The purpose of a site investigation is to make sure that the groundwater conditions are ideal, that the physical properties of rock and soil can accommodate construction, and that the building will be safe for anyone who enters it. …

What is the purpose of soil investigation in construction?

Purpose of soil exploration is: (i) To determine the basic properties of soil which affect the design and safety of structure i.e., compressibility, strength and hydrological conditions. (ii) To determine the extent and properties of the material to be used for construction.

What is sub soil investigation?

A Ground Investigation is an intrusive investigation to establish the soil and rock profile and parameters for Geotechnical and Environmental purposes. Sub Surface can design a site specific Ground Investigation to satisfy the Client’s project requirements and any regulatory authorities.

What is soil investigation process?

Soil investigation is to carry out physical testing on site to understand the ground conditions for geotechnical design (foundations, retaining walls & soil improvement). Usually, laboratory testing on soil samples extracted from site works will be carried out to determine the engineering properties of soil.

What are the information require in site investigation?

Site investigations should include: Susceptibility to groundwater levels and flow. Underlying geology, and ground and hydro-geological properties. Identification of physical hazards.

What is the information obtained in site investigation?

A site investigation is the overall process for the collection of information, appraisal of data, assessment and reporting. This data must be gained competently, in a timely manner and to a degree which is adequate and appropriate to each stage of design and development.

What information do soil investigation reports provide?

A soils report is the summary of a geotechnical investigation – an analysis of soil conditions at the site of a proposed building. Depending on site conditions, a soils report may identify expansive soils, high water tables, shifts in subsurface rock structures, as well as the soil’s response to earthquakes.

What are the information required in a site investigation?

A site investigation involves the collation of desk study information; appraisal of the data; assessment of the ground conditions; and the provision of an interpretative report.

What are the information required from soil exploration?

Soil exploration consists of determining the profile of the natural soil deposits at the site, taking the soil samples and determining the engineering properties of soils using laboratory tests as well as in-situ testing methods.

How many steps are involved in soil investigation?

A basic three stage site investigation scheme is put forward; stage I, which consists of “site exploration”, is preliminary; stage II, “site investigation”, is detailed; both these stages are more or less completed before construction starts; stage III, “foundation investigation”, is carried out during construction.

What are the information which can observe throughout a site investigation?

Susceptibility to groundwater levels and flow. Underlying geology, and ground and hydro-geological properties. Identification of physical hazards. Identification of methane and other gases.

What are the steps involved in site investigation?

Site investigation can be broadly classified into four stages: reconnaissance, data and map study, in-depth investigation and laboratory testing.

How are subsoil conditions examined in a building?

Subsoil conditions are examined using test borings, provided by soil engineer (geotechnical). Number of borings and location of borings depends on building type and site conditions.

What should be included in a soil investigation report?

Subsurface Soil investigation report recommendation should be based on testing of materials obtained from on site borings and to include: Bearing capacity of soil. Foundation design recommendations. Paving design recommendations. Compaction of soil. Lateral strength (active, passive, and coefficient of friction)

How many borings are needed for soil investigation?

Number of borings and location of borings depends on building type and site conditions. Typically for uniform soil conditions borings are spaced 100-150′ apart, for more detailed work, where soil footings are closely spaced and soil conditions are not even borings are spaced 50′ apart.

Why do you need to test the soil for a foundation?

For most construction projects of any magnitude, it is highly desirable to investigate the compaction characteristics of the soil be means of a field test section. Suitability of soils for foundations depends primarily on the strength, cohesion and consolidation characteristic of the soils.