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Tuesday, June 14, 2011

Method Statement For Pile Driving

SCOPE
This procedure refers only to the installation of the piles indicated. It does not include bored piles and jacked-in piles.

TYPE OF PILE
600mm Diameter Spun Pile
Working Load = xxxT          

EQUIPMENT
The following types of Hydraulic shall be used:
600mm Diameter                    -                       9 Ton Hydraulic Hammer

PILE SET CALCULATION
For this calculation, Hiley Formula will be used to compute the estimated SET for each type of pile:

Hiley formula :

SET = Awh / fL x (W+Pe2) / (W+P) – C/2

Hammer Efficiency                                         A
Mass of Hammer                                             W
Drop of Hammer                                             h
Safety Factor                                                  f
Pile Working Load                                          L
Total Mass                                                       P
Coefficient of Restitution                               e
Temporary Compression                                 C

Summary of Sets is to be attached. Set Calculation detailed with respect to hammer, drop and estimated penetration need to be provided.

The actual SET values will be recomputed at site based on the variable parameters of actual pile length installed and the actual temporary compression recorded.


SITE PREPARATION
Piling platform will be leveled prior to piling activities

SETTING OUT
Boundary survey shall be carried upon possession of site based on the pre-computation plan available. Setting out plan shall be submitted for checking and approval.

HANDLING, PITCHING, DRIVING AND EXTENSION
All handling and lifting will be at the designed lifting points and support points.

Boundary survey shall be carried upon possession of site based on the pre-computation plan available. Setting out plan shall be submitted for checking and approval.

During pitching and driving, the vertically of the pile will be continuously monitored and plumbed to ensure the pile is centrally in line with the pile axis to receive the hammer to prevent pile whip, twist or rotation.

Each pile shall be clearly marked with red ink at 300mm intervals along its length to enable the driving blows to be recorded at every 300mm depth of pile penetration.

The pile will be extended by butt-welding the steel plates on the pile heads. On completion of welding, the slag will be chipped off and wire brushed to receive red-oxide paint.

Each pile shall be driven continuously until the specified set and / or depth has been reached. A detail record of the driving resistance over the full length of each pile should be kept.

Friday, June 10, 2011

Method Statement - Concreting Work

CONCRETING WORK

OBJECTIVE
Method on how the concreting works are carried out

MATERIALS
Ready mixed concrete

PLANT, MACHINERY AND EQUIPMENT
Tower crane / Mobile Crane, Concrete Pumps, Concreting Buckets, Vibrators, Wheelbarrows, etc. as applicable

PREPARATORY WORKS
1. Request for design mix based on the concrete grades specified on structural drawings from the Ready Mixed Concrete Supplier(s).
2. Submit the proposed design mix to client / client’s representative for approval.
3. Submit request for inspection of structural members with client / client’s representative prior to concreting works using Structural Work (Reinforcement / Concrete) Inspection Checklist and Inspection and Test Plan.
4. Carry out receiving inspection of ready mixed concrete as per Material Receiving Inspection Checklist.
5. File completed Material Receiving Inspection Checklist as per Project Filing Index.

WORK METHODOLOGY
1. Take concrete cube samples for quantity specified in the contract document.
2. Mark the location of pour for concrete received on the delivery docket and checklist as reference and identification.
3. Provide adequate equipment, machinery and manpower to carry out the concreting works.
4. Place concrete on designated locations using concrete pumps and / or crane assisted concrete buckets.
5. Start concreting from a fresh location or a predetermined construction joint and continue uninterrupted up to the next predetermined construction joint or to completion.
6. If concreting is to commence from a construction joint, roughen the joint before placing the concrete when wire mesh is not available.
7. Place concrete from the lowest point to the final concrete level in one operation in horizontal layers.
8. Compact concrete by mechanical vibrators. Ensure that concrete is worked into the corners of the structural members.
9. After the concrete has set, carry out curing works by applying curing compound.

Method Statement - Placing Formwork

PLACING FORMWORK

OBJECTIVE
The method statement for placing of formwork

MATERIALS
Steel Form, Timber, Plywood, nails, scaffolding, frame / accessories

PLANT, MACHINERY AND EQUIPMENT
Crane, Lorry and Backhoe

PREPARATORY WORKS
1. Obtain relevant approved construction drawings from client / client’s representatives.
2. Set out the locations, centre lines and levels for formwork along with reference lines.
3. Prepare necessary formwork panels to the required dimensions and sizes.
4. Coat formwork surface evenly and thinly with release agent like form oil etc.

WORK METHODOLOGY
1. Erect the formwork by providing sufficient props and struts including necessary bracing.
2. Use scaffolding and staging arrangements, where necessary.
3. Seal gaps in formwork to avoid leakage of grout.
4. Ensure checking for the required shape and dimensions as per drawings.
5. Submit Request for Inspection Form for joint inspection with client / client’s representative using Structural Work (Reinforcement / Concrete) Inspection Checklist.
6. On completion of joint inspection, request client/client’s representative to sign on the checklist and file as per Project Filing Index.

Method Statement - Excavation And Backfill

EXCAVATION AND BACKFILL

The method statement by which the excavation and backfill with suitable fill is carried out.

PLANT, MACHINERY AND EQUIPMENT
-Excavator, Dump Truck, Dozer, Compactor and Back pusher.

PREPARATORY WORKS
1. Obtain relevant approved construction drawing from client / client’s representatives.
2. Set out the location and limits of work.
3. Carry out survey to obtain original ground level, excavation level and final backfilled level.

WORK METHODOLOGY
1. Prepare access to the working area and plan for the dump truck and plant movements.
2. Excavate to the required depth as indicated on construction drawing and dispose off at dump site.
3. Transport, fill and spread suitable material and compact as required.
4. Repeat step 3 until the required level is achieved.
5. Submit Request for Inspection Form for joint inspection using General Earthworks Excavation And Backfill Inspection Check-list.
6. On completion of joint inspection, request client / client’s representative to sign on the checklist and file as per Project Filling Index

Method Statement For Construction Work

Hi..

When I Start my work as a graduate Engineer, It's hard for me to find a Standard Work Method Statement. Thus, for those who are generally fresh engineer and have no idea about method statement,
I'll try my best to update on the method statement that are normally use in construction. For those senior Engineer, professional Engineer, Please do not hesitate to leave a comment or feedback on the method statement. I can't guarantee this method is right and suit to your work condition. You'll still need to justify or get your senior views before using or comply on any materials given here. 

Oh, I'll be glad if any reader would like to share their method statement here so that we can exchange knowledge with the other reader.

Thank You.