possibility of bim technology in site safety analysis...

\http://www.iaeme.com/IJCIET/index.asp 399 [email protected]

International Journal of Civil Engineering and Technology (IJCIET)

Volume 10, Issue 06, June 2019, pp. 399-410, Article ID: IJCIET_10_06_038

Available online at http://www.iaeme.com/ijciet/issues.asp?JType=IJCIET&VType=10&IType=06

ISSN Print: 0976-6308 and ISSN Online: 0976-6316

© IAEME Publication

POSSIBILITY OF BIM TECHNOLOGY IN SITE

SAFETY ANALYSIS AT IRAQI CONSTRUCTION

INDUSTRY

Hayder Rezzaq Abed

Postgraduate Student, Department of Civil Engineering, University of Diyala, Baquba,

Diyala, Iraq

Wadhah Amer Hatem

Assistant Professor, Baquba Technical Institute, Middle Technical University, Baquba,

Diyala, Iraq

Nidal Adnan Jasim

Assistant Professor, Department of Civil Engineering, University of Diyala,

Baquba, Diyala, Iraq

ABSTRACT

Too many workers are exposed to injury and death in the construction industry each

year, due either to the weakness and neglect of the application of health and safety

measures or weaknesses in the identification of risks related to the construction site.

The approach to safety risk assessment and the development of site safety plans is based

on 2D drawings and handwritten, fragmented and uncoordinated notes. BIM is

characterized by its ability to create a virtual environment similar to reality based on

concepts of visualization and simulation. The purpose of this research is to study how

this technology can be used in Iraqi construction industry to identify risks at different

project stages and to find appropriate mitigation strategies. The results of comparing

the site safety plan by using a traditional method with the BIM technique showed that

the BIM technique is more accuracy in management and analysis of the work site.

Finally, the BIM technology showed that the application of the safety measures in site

will increase the duration of the project by (3.66%). Analytical study.

Keyword head: Safety, Risk, BIM, Visualization, Traditional approach, 4D.

Cite this Article: Hayder Rezzaq Abed, Wadhah Amer Hatem and Nidal Adnan

Jasim, Possibility of Bim Technology in Site Safety Analysis at Iraqi Construction

Industry. International Journal of Civil Engineering and Technology, 10(06), 2019,

pp. 399-410

http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=10&IType=06

Hayder Rezzaq Abed, Wadhah Amer Hatem and Nidal Adnan Jasim

http://www.iaeme.com/IJCIET/index.asp 400 [email protected]

1. INTRODUCTION

Health and Safety of the workplace is a global challenge to civilization and sustainable

development [1]. In fact, the weakness of government support in the implementation of safety

measures and the poor culture of workers in the importance of safety in construction sites is an

important cause of a large number of injuries [2]. Construction management tends to ignore

safety constraints during the construction process; therefore, unless making good integration

between construction management and safety management, any construction project cannot

arrive optimum benefits of the vital objectives i.e. cost, time [3].

Usually, contractors use CAD drawings in construction to plan safety. CAD system

provides isolated and static design process. These CAD model provide specific architectural

features, topological description of buildings, they are not suitable to identify hazards in job

site [4]. So according to the changing nature and complicated of the construction project,

manual checking is often error-prone and labor-intensive [5].

BIM is a process works on a single virtual model that provide more efficiently and

accurately than traditional process, also offers more collaborative among team member (client,

architect, contractor, engineer, suppliers) [6].

The advantage of BIM starting through using it in an early conceptual design stage, where

the owner will have benefit from that. BIM can help the owner through provides a conceptual

design based on his budget and target. Without any complex design team, the feasibility of the

project can be analyzed depending on developing the conceptual design. When the conceptual

design is decided, cost estimation can be calculated. Depending on the cost of the project and

its feasibility the modification of the concept and design of the project will be easy without any

additional costs or create multi design ideas and compared between them to improve the

building [7].

The employment of BIM technologies can effect in improving occupational safety by mean

of connecting the safety issues to construction planning, providing methods to manage and

visualize up-to-date plans, and site status information. The use of BIM encourages other project

stakeholders to share in both planning and risk assessment [8].

There is a certain belief that BIM technology is always useful in identifying and

communicating risks to the project team because BIM technology allows simulation of the real

conditions of the site [9].

2. MATERIALS & EXPERIMENTAL PROCEDURES

In this research, the researcher adopted on case study approach in analyzing safety problems

and with a view to being able to use benefit from the possibilities that BIM technology offered

to generate a platform that helps in identifying, managing multiple hazards depending on the

concept of visualization and simulation, through creating a 4D BIM model that is somewhat

consistent with the realistic work site, then linking the safety guidelines (OSHA rules

(Occupational Safety and Health Adminstration,US), Iraqi Safety Blog) to this model. For this

research, the researcher used the following technology in site safety analysis:

Visualization.

Simulation.

Animation.

The software uses for this research is: Revit software which consider one of the best

software in modeling, to model the case study, Synchro software, which is one of the best

Possibility of Bim Technology in Site Safety Analysis at Iraqi Construction Industry


programs used in the field of 4D planning and safety analysis, MS project to create scheduling.

Figure (1) explains the framework of the safety analysis workflow:

Figure 1. Shows framework of the safety analysis workflow

2.1. Creating 3D Model of Case Study

For this research, Secondary School Building (16 Class) in Thi-qar province was adopted as a

case study. This type of project considers widespread in Iraq. This case consists of seven

buildings. Each building differs from another in dimensions. The total area of the project is

(8848 m2). The other details about the project summarized as following:

Start date: January 2014

The project is incomplete and stalled due to the economic crisis in the country

Type of Contract is unit price contract.

Height of (classrooms, Administration, Laboratory) Buildings is 7.36m

Height of Assembly building 6.18m

Height of (students’ toilets, guard room) is 3m

Ground floor begins from level (0.5) to level (3.68)

First Level begins from level (3.68) to level (7.36)

Figure (2) explain the 3D model of the secondary school building created by Revit

software:

Figure 2. Shows 3D BIM model of case study



2.2. Creating Time Schedules

The researcher created a time schedule of the projects by using M.S project software (Microsoft

project) which considers one of the important software in construction management, which

includes activities description, duration of activities and the relationship between them.

2.3. Creating 4D Model of Case Study

The researcher imports SPX file that exported from Revit software to Synchro software. The

time schedule was imported as an XML file to Synchro Software, then transforming the 3D

model to the 4D model to create a virtual simulation for the construction sequences, and adding

animation for workers and machines to be the site more reality Figure (3) shows 4D model:

Figure 3. Shows 4D model of case study

3. SITE SAFETY ANALYSIS AND MANAGEMENT BY BIM AND

TRADITIONAL APPROACH

In this research, the researcher depends upon five safety executors, their experience ranging

from 3 to 13 years. The HSE (Health and Safety Executors) suggested that two plans be

prepared to study site safety analysis:

1. Site safety arrangements: for traffic, storage, entrances, and site fencing.

2. Emergency response plan for the site.

The HSE will prepare traditional site safety plans by using 2D drawings to identify any

hazards or any necessary arrangement related to the construction project, then shows the 4D

model as dynamic model for them to identify hazards and to compare results of 2D with results

of 4D, to see which one is a better approach in identifying hazards and using a suitable safety

equipment.

4. RESULTS OF SITE SAFETY ANALYSIS

4.1. Site Safety Arrangement

The HSE will prepare a construction site plan which shows how the site area will be used for

arranging the required construction operations, then analyzing and identifying the hazards

relating to this arrangement. According to OSHA and Iraqi Safety Blog, the site layout plan

should include:

Site preparation (location and number of office facilities).



Construction of storage areas for building materials and loading away from workers'

movement.

Organizing the traffic inside the site during the different stages of the work to ensure

the safety of workers from the movement of vehicles

Keep the site clean by collecting and removing work waste that may be hazardous

to workers

Figure (4) shows the traditional site safety plan depending on 2D drawings:

Figure 4. Shows traditional site safety plan

When compared this plan with the 4D BIM model, the results were the followings:

1. They explained the 4D model is more realistic than 2D drawings, that can help in

the daily training of workers on the details of the site that maybe change during any

period of time. Figures (5), (6) show that:

Figure 5. Shows installing exterior temporary fence

Figure 6. Shows changing in details of the site in different period



2. With the help of the 4D BIM model, the HSE noted that 29 days after the project

began, there would be a conflict between the location of the caravan No. 3 and the

excavator used to drill the footing of the outer fence, and therefore the presence of

the caravan at this place would endanger the lives of its occupants. Figure (7) shows

that:

Figure 7. Explain conflict the excavator with caravan no.3

3. They found that the road between the buildings will be narrow over a certain period

of time due to excavation work and because of the use of safety barriers around

these excavations, where the 4D model shows that the width of this road may reach

less than 3m; therefore, the machines cannot move safely because of maybe lead to

overturning in the excavations. Figure (8) shows that:

Figure 8. Shows narrow roads of the site between the buildings

Then, they found after (86 day) from beginning the project, it is possible to increase the

width of the road after finishing backfilling works, figure (9) shows that, while the road

between the assembly building and the administration building cannot use it until finishing

installation works of steel structure because of the danger from the crane machines, figure (10)

shows that:



Figure 9. Increase width of road Figure 10. Explain hazard in this part of road between

classrooms and laboratory between assembly building and administration

4. According to the problems that appeared in point 1, 2, the HSE found it necessary

to create new arrangements for the site. With helping of 4DBIM model, they found

an ability to create a new entrance between the administration building and the

building of the classrooms, and they proposed to make this entrance just for workers

and placing a caravan no. 3 in the new entrance to check the workers' wearing of

safety equipment. Figure (11) shows that:

Figure 11. Shows the new proposed entrance for workers

Since it was difficult to use the previous entrance due to excavation work and subsequent

installation works of the steel structure and to minimize the movement of the machines inside

the site to maintain workers' safety, the HSE proposed creating a new entrance allowing only

the mechanisms to reach for the administration building and guard room. Figure (12) shows

that:

Figure 12. Shows the proposed entrance reach to Administration building



5. Through the 4D model, the HSE found that the storage space of the materials

installed in the 2D drawings can be adopted because it does not conflict with the

site's works at all time, and create a special entrance for materials trucks. Figure

(13) shows that:

Figure 13. Shows the temporary fence around materials inside site

6. The HSE believes that the BIM 4D model is more accurate in showing all the details

of the site, especially showing the lighting of the location and the monitoring

system, which is somewhat inaccurate and unclear in the 2D drawings, where these

things are often handwritten notes. Figure (14), (15) show that:

Figure 14. Shows the location of cameras Figure 15. Shows location of lighting

7. During the 4D model, traffic can be organized at the site during different project

durations, while that would be complex or may be impossible in the 2D model

because of that need multiple schemes for each scenario, while in the 4D model all

scenarios in a single model. Figure (16) (17) show that:

Figure 16. Shows the traffic barriers during Figure 17. Shows location of traffic

cast of footing for safe site. barriers to explain hazard from machine



4.2. Emergency Response Plan

According to Iraqi safety blog and OSHA, the emergency plan should have:

Prepare copies of the emergency plan to ensure the safety of workers.

These copies should explain the exit routes and places of emergency equipment and

first aids.

Identifying materials which are potential fire hazards.

Two exit routes at least must be available in the workplace to allow prompt

evacuation of workers

Provides training to workers with regard to fire hazards or other hazards which they

may be exposed.

Figure (18) explains the emergency action plan in 2D drawings was:

Figure 18. Emergency response plan by traditional approach

Where the HSE drawings show the escape routes and the location of the signs of the exits,

in addition, show the places of fire extinguishers, first aids in the site. The results from

comparison with the 4D BIM model were:

8. Through the 4D model, the HSE have found the possibility of using the workers'

entrance as the third exit for emergencies. The 4D model is more realistic for

emergency roads compared to 2D schemes. Figure (19) shows emergency route

with red color, and figure (20) shows emergency signs.

Figure 19. Shows the emergency routes Figure 20. Shows the emergency sign

9. The 4D model explained that during the first month of the project there is one place

containing first- aid and fire extinguishers (other caravans were not installed due to

excavation works). Figure (21) explains that. Then, in February month, fire

extinguishers and first-aid are providing at each caravan and near storage of



materials. This will make workers aware of emergency equipment places during

project times. Figure (22) explain that:

Figure 21. show the first aid and extinguishers Figure 22. Show first aid and extinguishers in in

first month February month

10. After (6 months) from beginning the project, the HSE discovered through the 4D

BIM model, that during the timber framework of the first floor of the buildings there

is a danger of the exposure of these timbers for fires, so they found it necessary to

use the escape ladder for each building and put an emergency sign to explain that it

is only for emergencies. The reason for using the emergency ladder and not relying

on the building stair is contains the wooden columns that support the roof shuttering

figures (23), (24) show that:

Figure 23. Shows emergency ladder for Figure 24. Shows emergency ladder for

administration building classroom building

11. The HSE engineers find that the 4D model can be used to train workers on how to

use emergency routes, first-aid places, and fire extinguishers at any time in the

project, through create training movie, while in the 2D drawings will be so difficult.

Figures (25) shows creating animation movie for a project during different times:



Figure 25. Shows ability of the software in record training movies for safe arrangement of site to train

workers

4.3. Effect Safety Analysis on Total Time of Project

In fact, the implementation of the safety measures led to an increase in the time of the project.

The planning engineers found it difficult to determine the increase based on the traditional

methods due to the overlap of works and changes in the site, while they found that it is very

easy to calculate the exact additional time the 4D model. Table 1 show this increase:

Table 1 Shows effect of safety procedure on the project time

No. Description Details

1 Duration of project without safety procedure 300

2 Duration of project with safety procedure 311

3 The percentage of increase of time 3.66%

Note: percentage of increase = ((duration with safety - duration without safety)/ duration

without safety) * 100%

= ((311-300)/300) *100% = 3.666%

5. CONCLUSION

In Iraq, the construction industry has caused more injuries and deaths than in other industries.

This is due to the weakness of knowledge of the concept of safety by designers, which results

in many of the safety hazards inherent in the project drawings. In fact, it is difficult for

contractors to identify all safety risks at the planning and pre-construction stage of a project.

BIM technology can help to create an environment that is similar to the real environment

through which the problems related to the safety of workers and equipment will be solved and

provide a safe working environment. For this reason, BIM technology can help improve site

safety by linking the four-dimensional BIM model to safety regulations (OSHA and Iraqi

Safety Blog).

This research seeks to demonstrate the weakness of traditional risk management methods

based on 2D drawings, and to improve workplace safety through the use of BIM technology to

assist safety managers in accurately identifying risks to different phases of the project, finding

appropriate strategies for site safety and preventing any conflicts or Delay due to the application

of safety measures. Safety managers through comparisons, explain that BIM was more accurate

and more realistic in identifying risks to the workplace and it will be a good tool to solve all



safety problem in the planning stage before physical build. Finally, the BIM technology

explained that the application of the safety measures at the site will increase the project duration

by (3.66%).

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