SUPERVISION ON CONSTRUCTION SITE Obligations of supervisor on site

Transcription

1 Spearhead Network for Innovative, Clean and Safe Cement and Concrete Technologies SUPERVISION ON CONSTRUCTION SITE Obligations of supervisor on site Mr. Mario Ille, PhD candidate, IGH Azra Balagija, PhD candidate, IGH Zagreb SPIN Meeting, 7-12 May, 2012

2 CONTENT Introduction Contractor and supervisor engineer obligations, rights and duties Application of valid regulations on example of Krk bridge Conclusion Zagreb SPIN Meeting, 7-12 May, 2012

3 INTRODUCTION The rights and duties relating to contractors and supervisors in the process of construction through review of the most important Acts, Technical Regulations and Ordinance that were developed and legislate in recent years. Implementation of quality control of concrete on the site as one of the obligations of contractors in the construction procedure, all in accordance with applicable regulations in the Republic of Croatia. Croatia is preparing to become a member of the European Union and it is necessary to adapt their regulations to those that apply to the EU market, but it is also necessary to comply with applicable regulations.

4 CONSTRUCTION PARTICIPANTS In accordance with Article 177. Physical Planning and Building Act (NN 76/07, NN 38/09, NN 55/11, NN 90/11 & 50/12) Investor Designer Reviser Contractor Supervisor engineer

5 OBLIGATIONS OF CONTRACTOR In accordance with Act contractor is obligated to build according to approved main design and building permit and thereat: Confer performance of construction works and other works to persons who fulfill ordinance requirements for performance of these works Perform works in order to fulfill basic requirements and other requirements for structure Embed construction products and equipment in accordance with Physical Planning and Building Act

6 OBLIGATIONS OF CONTRACTOR Provide: proof of usability of embedded construction products proof of compliance of embedded equipment according to specific act documents of compliance of specific building parts to basic requirements for structure and from competent authority given proof of quality (testing results, records of conducted control quality procedures etc.) Legally dispose construction waste generated during construction on the site Draw up a written report of conducted works, and of the maintenance building

7 SUPERVISIOR ENGINEER In accordance with Physical Planning and Building Act Supervisor Engineer is a natural person who under a special law has the right to use the professional title of a licensed architect or licensed engineer and to conduct technical supervision of construction on behalf of the Investor. The supervisor engineer can not be an employee of a person who is the contractor on the same building

8 OBLIGATIONS OF SUPERVISIOR ENGINEER Supervise the construction to be in accordance with confirmed the main design, or building permit, Physical Planning and Building Act and special regulations Determine if a main design in terms of horizontal and vertical dimensions and purpose of the building is made in accordance with the decision on building conditions or location permit Determine if construction staking is performed by the person authorized to conduct affairs of state survey and real property under a special law Determine whether the contractor meets the requirements for performing construction activities, regulated by special law

9 OBLIGATIONS OF SUPERVISIOR ENGINEER Determine the implementation of control procedures in respect of compliance assessment, and prove the quality of certain parts of the building by an authorized person Immediately inform Investor with all the disadvantages or irregularities perceived during construction, and Investor, building inspections and other inspections of the measures taken Compile a final report on the building construction.

10 CONSTRUCTION CONSTRUCTION /BUILDING Performance BUILDING OF of NEW construction STRUCTURE works which affect the fulfillment of basic requirements for RECONSTRUCTION the existing structure REMOVAL OF Performance EXISTING of construction STRUCTURE works in order to preserve the basic MAINTENANCE requirements OF for the existing EXISTING structure STRUCTURE

11 REPAIR AND PROTECTION In the past few decades the need for renovation of existing structures (especially bridges) has increased. With development of the area of repair and protection of concrete structures the legal and technical regulations related to this area also had to pursue. The adoption of new rules for concrete structures (Technical regulation for concrete structures) involved products and systems for the protection and repair of concrete structures for the first time. At the same time the Ordinance on conformity assessment, documents of conformity and marking of construction products was adopted and therefore brought the obligation to bring the approval of the conformity of these products according to EU principles.

12 EXAMPLE OF KRK BRIDGE REPAIR It was built from 1976 until 1980 Only six years after the opening for traffic it was concluded that some badly done structural solutions must be repaired urgently and that concrete structure has to be protected from the chloride ingress First repair and protection works begun in 1989

13 KRK BRIDGE The bridge connects the mainland with the island of Krk over islet of St. Mark in the vicinity of Kraljevica through two sea channels Its total length is m without abutment (including the 96 m road cut on the island of St. Mark)

14 KRK BRIDGE Two highest columns (S8 & S17) are 61,44 m high Width of big arch is 13,00 m

15 BUILDING PARTICIPANTS SHEME INVESTOR TECHNICAL SUPERVISION CONTROL TESTING CONTRACTOR SUBCONTRACTOR LABORATORY ON CONSTRUCTION SITE

16 BASIC DOCUMENTATION FOR QUALITY MANAGMENT AT THE CONSTRUCTION SITE Documentation that preceded the construction and execution: Building permits (with the main design as an integral part, the site permit) Detailed design, program control and quality assurance Appointments of persons responsible under the Physical Planning and Building Act Study on site organization with the work protection and safety and fire protection Record of the geodesic construction staking Plan for quality performance Laws, regulations, technical regulations and standards

17 BASIC DOCUMENTATION FOR QUALITY MANAGMENT AT THE CONSTRUCTION SITE Documents and records generated during construction: Construction diary, Construction book Specifications of materials and construction products in the order Supplier Declaration of conformity, certificates of conformity of products, the certificate of factory production control, technical instructions for installation and use of products Records of the control activities carried out on site Evidence about the quality of the built-in concrete (reports of examinations conducted on the site) Proof of usability of concrete structure according to Technical regulations for concrete structures annex J.2.4

18 QUALITY CONTROL FOR COLUMS REPAIR PREPARATION WORKS FOR COLUMNS REPAIR DEMOLITION OF CONCRETE COVER EMBEDING OF NEW STEEL REINFORCEMENT CASTING WITH NEW CONCRETE AND PROTECTION LAYER CONSTRUCTION SITE ORGANISATION CONTRACTING SUPPLIER CONTROL PROCEDURES BEFORE INSTALLATION PROJECT DOCUMENTATION GEODESIC STUDY OVERVIEW CONCRETE SURFACE A FTER REMOVAL DETERMINATION OF SURFACE PROPERTIES (CONTROL OF PREPARED SURFACE STEEL REINFORCEMENT OVERVIEW STEEL REINFORCEMENT IN ACCORDANCE TO HRN EN AND REGULATION FOR CONCRETE STRUCTURE ANNEX B MADE ACCORDING TO DESING REINFORCEMENT EMBEDING ( FOLDING AND CONNECTION FITTINGS CONTROL ) CASTING WITH NEW CONCRETE QUALITY MANAGMENT OF CONCRETE CONTROL TESTING OF BUILT IN CONCRETE AND PROTECTION SYSTEM

19 HYDRO DEMOLITION OF CONCRETE COVER ON COLUMNS AND ARCH

20 SURFACE EXAMINATION

21 QUALITY CONTROL OF SURFACE PREPARATION The appearance of concrete surface after removal of the damaged and contaminated layer of concrete with hydro demolition Place of testing the quality of surface preparation - Tensile strength of the surface layer of the pull-off method

22 APLICATION OF REPAIR PRODUCTS ON COLUMNS Scaffolding for columns repair

23 APLICATION OF REPAIR PRODUCTS ON ARCH

24 CURING OF PLACED MATERIALS The curing conditions of placed layers or elements of mortar / concrete and the procedures for quality control are given in Technical and technological conditions of quality

25 QUALITY MANAGMENT OF CONCRETE DURING CONSTRUCTION contractor documentation and records: Program of quality performance Concrete casting records Regulate the management and execution of concrete works and ensuring quality control during the execution of concrete works (includes scaffolding, reinforcement, casting, precast elements, geometric tolerance, supervision and repair) Supervision before concreting Fresh concrete control and supervision before casting Casting and compacting of concrete Supervision after casting Supervision of precast concrete elements

26 QUALITY MANAGMENT OF CONCRETE DURING CONSTRUCTION contractor documentation and records: Record of taking samples Uniformity of compressive strength test results General data of construction site Concrete data List of necessary hard concrete testing Data about taking samples

27 QUALITY MANAGMENT OF CONCRETE DURING CONSTRUCTION documentation Institute IGH: Program of in-situ concrete control testing Sample taking record General data of construction site Fresh concrete data Testing results of fresh concrete in-situ Equivalent elements of concrete structure data Data about taking samples

28 QUALITY MANAGMENT OF CONCRETE DURING CONSTRUCTION documentation Institute IGH: Cast in concrete testing results assessment Final report on conducted control procedures of concrete quality establishment

29 CONTROL TESTS BY TYPES OF WORK (reprofiling, grouting, the new concrete/mortar, surface protection systems)

30 CONCLUSION Croatia has established building regulations and is still evolving and adapting to market demands of the EU (Laws, Concrete Structures is used, Decrees, Regulations, Standards) The obligation of all participants meet the requirements of statutory construction and current building regulations The design and construction going on at our mistakes are too much of contempt and misinterpretation of the applicable regulations

31 CONCLUSION RULES THAT SHOULD BE ADOPTED Regulations to regulate the manner in tests samples from the site in the laboratory contractors or independent accredited laboratory Complete work on national standards appendix for the Performance of concrete structures HRN EN 13670: in progress

32 THANK YOU FOR YOUR KIND ATTENTION!