What is a walkover survey in construction?
A walkover survey is a direct inspection of the site and the surrounding area carried out in conjunction with the desk study. Indications of any potential hazards should provide a basis for the investigation. A photographic record of the site can help in the reporting of the walkover survey.
Why is a walkover survey important?
A walkover survey of the site and surrounding area allows any obvious visible or noticeable surface issues to be identified, including polluted surface water and nearby sources of potential contamination. The Desk study enables conclusions to be drawn regarding the pollution and contamination risks.
What is survey data in construction?
Construction surveying or building surveying (otherwise known as “staking”, “stake-out”, “lay-out”, “setting-out” or “BS”) is to stake out reference points and markers that will guide the construction of new structures such as roads or buildings.
How would you go about a ground investigation for a building structure?
The site investigation should be carried to such a depth that the entire zone of soil or rock affected by the changes caused by the building or the construction will be adequately explored. It is good to have at least one boring carried to bedrock, or to well below the anticipated level of influence of the building.
What is the purpose of a trial pit?
Trial pits are used to recover large bulk samples of soil or where thorough visual examination of the strata is required. The principal advantage of this method compared with light-cable percussion drilling or window sampling is the relative speed with which the work can be carried out.
What is the role of soil exploration in geotechnical engineering?
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 do construction surveys work?
The purpose of doing a construction survey is to maintain and establish the necessary vertical and horizontal control needed for a construction project. It includes taking measurements to ascertain quantities, and then put these measurements in documentation to corroborate the final payments made to the contractor.
What is a desktop survey?
A desktop study is the first part of the site investigation process. It involves a desk based collation of documentary data such as site history, geology, hydrogeology/hydrology, waste records, records of pollution incidents etc. to produce an outline conceptual model.
How much does a soil test cost for building UK?
The cost of a soil investigation depends on the size of the project and whether there are planning conditions to be satisfied. A desktop study of a site could cost around £600 plus VAT. A basic soil investigation costs around £1,500 plus VAT, scaling up from there depending on the size and complexity of the project.