4D Four Dimensional Visualization of Construction Scheduling & Site Utilization

7/27/2019 4D Four Dimensional Visualization of Construction Scheduling & Site Utilization

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Four-Dimensional Visualization of

Construction Scheduling and Site

Utilization

K. W. Chau; M. Anson; and J. P. Zhang


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Outline

Abstract

Introduction to 4D

Example case The developed system

Conclusion and discussion


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Abstract

Site management are at times lacking inthe following areas:

generation of site usage layouts

estimation ofquantities of constructionmaterials

cost evaluation

The objective of this work is to enablevisual study of the effects ofjob progresson the logistics and resource schedules.


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(1) Introduction to 4D

What is different in the before?

Why we need 4D?


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State of construction before

A major characteristic of a contemporary

construction project is its complex and

multidisciplinary nature.

That for most construction projects, the

clients requirements are still represented

in terms ofpaper-based working drawings.


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Site planning

In this process, planners have to take intoconsideration practical constructionsequence, proper workspace logistics, and

feasible resource allocation, and the useof site space.

In practice, the initial site layout drawingsthat show the site organization andutilization are normally not updated asconstruction progresses.


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State of computer tools before

contemporary computer-aided toolsincluding bar charts orcritical path methodnetwork charts can only represent the

schedule, but not the spatial features orthe associated resource requirements.

Visual representations of the project atdifferent instants cannot be provided

project progress

status of site space usage


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Site management

Si t e

Pl at e

St eelWorkspace

et c. . . .

where t o put ?when t o put ?


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Tradition

si t e

can you f i ne any er ror?


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4D


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(2) Example case

The system developed in this research


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Building background

Tradeport Logistic Center

a three-story warehouse building site

during the actual construction of the project, in order

to verify and validate its performance in real practice. The construction period for the structural works

was from January to October 2002.

The client, The Hong Kong Land Company

Limited

The contractor, Gammon Skanska Limited


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Input of building story


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Input data of various elements and their relationships


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Input of segment and associated scheduling


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Some predefined templates of construction activities


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4D visualization linking 3D geometrical model with schedule


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4D state being updated


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4D visualization on projected data


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(3) The system developed in

this research

How to develop this system?

What is the system architecture?


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Characteristics of 4D Visualization

Model in this research

Generation 4D visualization model

3D geometrical model

associated schedule of activities.

to enhance its capability to carry out usefulsite management functions overdifferentspatial and temporal domains.

visualized planning Analysis for each activity, material

allocation, and cost breakdown.

Bidi i l D E h b


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Bidirectional Data Exchange between

3D Model and

Schedule This model allows bidirectional data exchange

between the 3D geometrical model and theproject schedule.

to update the construction plan eitherthrough 3D graphical environment bar chart scheduling environment.

If the timing of a certain activity is modified

graphically on the screen, synchronizedadjustment of that activity will be madeautomatically to the bar schedule


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Architecture of 4D Visualization Model

MS Project

Construction

SchedulingData

Visual C++

Construction

Processor

AutoCAD

3D Geometrical

Module

AutoCAD ObjectARX

4D Visualization Module

Micrsoft OLAPData Warehouse

User Interface


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Architecture of 4D Visualization

Model

4D Visualization Module withAutoCAD

ObjectARX

Construction Processorwith Visual C++

Key instrument for changing data

3D Geometrical Model underAutoCAD

Environment

Bar Chart Scheduling with Microsoft Project Data Warehouse with Microsoft OLAP

User Interface with Visual C++


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(4) Conclusion and discussion

It is almost to end.

Wake up and wait to finish class.


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Conclusions

a prototype 4D visualization model has

been developed

This 4D visualization model

activity schedule

associated allocation ofresources

layout of site facilities at any projected instant.

resulting in a user-friendly and integrated

site management tool.


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Discussion

This system are bonded with AutoCad and

Microsoft project. If we want to sell this

system, how can we deal with the license

problem?

Did you have any suggestion for this

system? How do you think of an online

version of 4D software?

Documents

4D Four Dimensional Visualization of Construction Scheduling & Site Utilization