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Extending BIM to Capture Construction Process Documentation James D.Goedert Ph.D., P.E Department Head of Construction Systems University of Nebraska-Lincoln

Pavan Meadati Ph.D. Assistant Professor Southern Polytechnic State University


OUTLINE • • • • •

Introduction Construction Project Details Methodology Results Conclusion


Problem Statement The Building Information Modeling (BIM) tends to stop at the preconstruction phase leaving large amounts of relevant data out of the final model needed by facilities management for possible recommissioning or decommissioning efforts.


Introduction – BIM Current Status

Construction

PRE

During

POST

Reduced RFIs

Design Phase

Actual Schedule

Space conflict problems

3D

Design Phase 3D

4D 5D

Constructability problems Hazard Analysis

Preconstruction Schedule Cost Estimates

Resource Allocation

2D As Builts

RFI Submittal

Actual Cost

Change orders

Site Photos Shop Drawings Specifications


Research Objective To extend the Building Information Modeling (BIM) beyond preconstruction phase by integrating construction process documents and create a single repository of facility data to the owner.


Desired BIM Status in Construction Phase Construction

During

PRE

POST

Reduced RFIs

Design Phase

Actual Schedule

Space conflict problems

3D

Design Phase 3D

4D 5D

Constructability problems Hazard Analysis

Preconstruction Schedule Cost Estimates

Resource Allocation

2D 3D As Builts

RFI Submittal

Actual Cost

Change orders

Site Photos Shop Drawings Specifications


Sub-Objectives & Goals Sub-Objective -1: Capture 3D as-built data into the BIM model

Identify the technology, approach and customize the tools or techniques to capture the as-built components x, y and z coordinates and develop the 3D as-built model in three different vendor’s BIM software products.

Contd.


Sub-Objectives & Goals Sub-Objective – 2: Develop 4D as-built model

Develop a 4D as-built model for depicting the actual progress of the project in three different vendor’s BIM software products

Contd.


Sub-Objectives & Goals Sub-Objective -3: Use BIM to capture and store construction documents

Develop means to integrate RFI, specifications, submittals, and shop drawings, to each component of the 3D as-built model in three different vendor’s BIM software products


Construction Project Details Name: Offut child care extension project Area of Addition: 4200 SF at the south end of the existing structure Data Obtained: 2D drawings Specifications Rough P3 schedule Project Duration: Start Date – 4/24/2006 Completion Date – 8/10/2006


Methodology Part - A Acquisition of three dimensional data & development of 3D as-built guide line layout in AutoCAD Part - B Development of the following using Autodesk, Bentley, and Graphisoft BIM Software products • Three dimensional as-built model • Four dimensional as-built model • Integration of construction documents


Tools to collect 3D as-built co-ordinates Tool – 1: Custom Built Robotic Laser Rangefinder System Leica Disto plus laser distance meter

Directed perception 230 tele-operated pan and tilt unit

Tripod

Sub objective -1: Capture 3D as-built data into the BIM model


Tools to collect 3D as-built co-ordinates Tool – 2: Total station

Orientation

Model: Leica TPS 1200 Sub objective -1: Capture 3D as-built data into the BIM model


Guide Line Layout for 3D As-builts in AutoCAD

Sub objective -1: Capture 3D as-built data into the BIM model


3D As-built Model in Revit

Plumbing 3D as-builts

As-built 3D model excluding MEP

Sub objective -1: Capture 3D as-built data into the BIM model


3D As-built Model in Bentley

Plumbing 3D as-builts

As-built 3D model excluding MEP

Sub objective -1: Capture 3D as-built data into the BIM model


3D As-built Model in Graphisoft

Plumbing 3D as-builts

As-built 3D model excluding MEP

Sub objective -1: Capture 3D as-built data into the BIM model


Develop 4D as-built model Steps • • • •

Develop as-built schedule Link 3D as-built model and as-built schedule Develop means to run queries Develop means to integrate daily jobsite photographs with the model

Sub objective -2: Develop 4D as-built model


Develop an as-built schedule Contractor’s Daily Progress sheet

As-built schedule – Microsoft Project

Sub objective -2: Develop 4D as-built model


Query – 1: Specific day progress

Bentley

Autodesk

Sub objective -2: Develop 4D as-built model


Sub objective -2: Develop 4D as-built model

Query -2 Progress during specific period

Bentley

Autodesk


Site Photographs Integration Steps ƒ Site Pictures Storage ƒ Interface development ƒ Integration

Graphisoft Autodesk

Sub objective -2: Develop 4D as-built model


Construction Documents -Integration Documents Specifications, shop drawings, change orders, request for information (RFI), submittals • Existing Parameters do not facilitate post construction data linkage

Steps • Creation

of new parameters

• Link the elements and documents

Sub objective -3: Use BIM to capture and store construction documents


Integration – Autodesk Products

Sub objective -3: Use BIM to capture and store construction documents


Integration – Bentley Products

Sub objective -3: Use BIM to capture and store construction documents


Integration – Graphisoft Products

Sub objective -3: Use BIM to capture and store construction documents


Results Summary Vendor

Autodesk

Bentley

Graphisoft

Sub-objective-1 Capture 3D as-built data into the BIM model

Completely achieved

Completely achieved

Completely achieved

Sub-objective-2 Develop 4D as-built model

Partially achieved

Completely achieved

Completely achieved

Sub-objective-3 Use BIM to capture and store construction documents

Completely achieved

Completely achieved

Completely achieved

ƒ Time required to accomplish the sub-objectives in each vendor’s products varied • Availability of the components in the library • Amount of programming • Programming language


Conclusion BIM has the potential to substantially change the way construction is performed and documented. BIM could eventually become the sole source of information including facilities management and planning by further research investigations and software developments. The methodology discussed in this research serves as an initial step to extend BIM beyond the preconstruction phase of the project life cycle


Thank You


James D.Goedert Ph.D., P.E Department Head of Construction Systems University of Nebraska-Lincoln (Omaha campus) PKI 102D, 1110 So. 67th St. Omaha, NE, 68182 Phone: . 402-554-3281 E-mail: jgoedert@unomaha.edu

Pavan Meadati Ph.D. Assistant Professor, Construction Management Department Southern Polytechnic State University H 342-A, 1100 South Marietta Parkway Marietta, GA, 30060 Phone: 675-915-3715 E-mail: pmeadati@spsu.edu


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