NAME : NORSYAHIDA BT HUSIN
MATRIX NO. : 2010258264
LECTURER’S NAME : MADAM JULIANA MARTIN
DATE OF SUBMISSION : 19 FEBRUARY 2013
In all civil engineering works, the most crucial is the reliability of the information about the ground on which the civil engineering project will be founded. We would call this SI, or Site Investigation Information or simply SI. There are various methods of obtaining SI information, in this paper we will concentrate on most widely used method, that involving Boring and Drilling.
IMPORTANCE OF SI INFORMATION
We, the Engineers, all will agree that SI is a specialist operation. Almost all SI is remotely carried out (we are testing grounds below from surface!) and because of this, it is necessarily the most procedure oriented operation. Therefore, for SI information to be meaningful, it requires strict adherence to procedures and good practice. Which simply translated means, adherence to Code of Practice and Specifications. All Engineers fully agree with these statements. On the basis of the data obtained via SI (costing less than 0.1 % of the project costs), millions or billions will be committed to the project. It therefore makes engineering sense that SI must only be carried out using suitable equipment and ancillaries and by trained persons under the supervision of equally if not better trained supervisors. All SI specifications for Site Investigation in use today in one way or another emphasize workmanship supervision and have similar requirements namely:
1. Method of boring must be such that observations are possible and soil volume to be tested remain undisturbed before being tested.
2. Boring to be carried out using Drill Rods with bits attached to be used for 3. advancing of bore holes
4. Judicial use of water
5. Testing requirements
6. References to SO, Supervisor or similar implying competent supervision 7. References to Code of Practice and Specification, in siting on adherence to procedures
SHORT COMINGS OF OUR SI PRACTICES
Surprising issue is, that all of us fully agree with nice statements like above, we even use reasonably good specification, yet if we were to visit any SI site anywhere in our country, we will find there is not a single SI site where any of these sentiments and requirements are met. Situation at each SI location is virtually the same, namely
1. No reference documents (CP or specifications) on site
2. Machines and ancillaries in non-compliance with specifications 3. Unacceptable procedures, sampling, testing, transporting 4. Untrained operators
5. Untrained, usually non existent supervisors
SI information produced from these worksites, in the form of SI REPORTS are equally compatible to situation on the worksites and have following in common
* All most all introduction portion of reports describe methods which are not same as on site
* All presentations and soil descriptions in bole logs vary from company to company and in some cases different locations and pay no relevance to say, laboratory tests, consistency etc
* From bore holes logs, based on presentation and lack of site observations, it also can be inferred that
* All strata changes in ground below occurs at 1.5 meter intervals in Malaysia
* There are never any occurrences of Water losses, change in water colors, water ingress, material changes.
HOW SUCH PRACTICES AFFECT PROJECTS
All above results in final product called SI REPORT or FACTUAL REPORT. Such “FACTUAL” SI Reports, based on information as obtained from methods adopted to day present information which are far from being reliable, costly in long run and even dangerous. This reinforces common, but a very basic premise, “GOOD DECISION CANNOT BE MADE ON BAD INFORMATION”.Project costs and safety are have direct bearing on information we use in our...