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Guidelines for pile foundation report preparation

Cawangan Jalan, Ibu Pejabat JKR, K.L

Guidelines for Pile Foundation Report Preparation(Geotechnical)

Suggested guidelines for preparation of the report are given below and the guidelines are not considered to be exhaustive or intended to restrict the scope of the report in any manner.1. Objective

2. IntroductionTypes of structure and loading.

3. Site Condition3.1 Surface condition

- topography : hilly, rolling, flat or fill ground

- types of vegetation

- any swamp or waterlogged areas?

- nearby structures with particulars reference to distance, height, types of structure, types of foundation and their performance.

- land drainage paterns (rivers, tidal level, flood levels etc).

3.2 Subsurface condition- geological information

- scope of S.I. carried out

- generalized subsoil properties and profile

- ground water (undersirable salt contents, possible fluctuation of water table etc.).

- comments or evaluation of S.I. results.

3.3 Other relevant information- geophysical data, if any

- aeriai photo, if any

- nearby S. I. results, if any

- nearby curdrop of rock, if known

- nearby deep excavation, if known

- buried structure (water pipes, sewer pipes, cables etc.).

FOR INTERNAL USE ONLY

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Guidelines for pile foundation report preparation

Cawangan Jalan, Ibu Pejabat JKR, K.L

- nearby quarry, railway etc.

- approach road condition

- etc.

4. Foundation analysis. and recommendations4.1 Selection of types of foundation

- state types of foundation recommended and reasons/criteria based.

- if piles are used, analysis leading to conclusion on that particular type of pile should be shown (use chart or table).

- also state whether the pile are frictional, end-bearing or both.

4.2 Estimation of ultimate loads- state method/forrnula, assumptions, and correlation of soil parameters

(Quote reference).

- design perimeters used should be clearly stated. Analysis to obtain design parameters should be shown in Appendix.

- for big pile group, check block failure and group efficiency with particular reference to frictional piles. Negative friction may need to be considered if in compressible subsoil where the ground is likely to settle.

- states FQS used to derive allowable loads of piles.

4.3 Settlement Analysis- estimate elastic and consolidation settlement for the pile group and assumptions

should be clearly stated.

- detailed analysis to obtain. design parameters should be shown in Appendix. Possible ground settlement due to fill on soft subsoil?

4.4 Load Testing Requirement- state nos. of tests required

- method of test and details

- criteria of acceptance of load results (it different from JKR Standard Specification).

4.5 Associated designs- if there are major cut and fill slopes, state stable slope inclination, slope

protection, surface drainage, subsoil drainage, retaining walls etc. if necessary.

- any soil improvement?

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Guidelines for pile foundation report preparation

Cawangan Jalan, Ibu Pejabat JKR, K.L

- general drainage design if geotechnical properties are affected.

- check how the above problems which may affect loading in piles.

4.6 Constructional advice- extent and degree of supervision

- possible site problerns and how to overcome

- special precautions necessary to ensure design considerations are fulfilled.

- methods of construction.

- special precautions against possible damages to nearby structures.

5. ConclusionBrief summary of foundation recommendation.

6. ReferenceList of references.

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