Introduction. New regulatory documents and legal acts in the field of construction have entered into force. In particular, the Law of Ukraine «On Building Regulations» dated November 5, 2009 No. 1704-VI (as amended). Also, new data appeared regarding the need for periodic inspections of transport facilities, etc. Therefore, it became necessary to revise the set of regulatory and technical documents regarding the examination and testing of bridges and pipes. One of the parts of this work was the development of DSTU 9123:2021, which included, in particular, the issues of inspection and testing processes, which, in the future, will be removed from DBN B.2.3-6:2009. After the approval of the developed DSTU 9123:2021, it is planned to revise DBN B.2.3-6:2009, in particular, in terms of removing procedural provisions from it. The scope of DSTU 9123:2021 applies to the same structures as in DBN B.2.3-6:2009.
Problem Statement. At present, the main document on examination and testing of bridges and pipes is DBN B.2.3-6:2009. Some provisions of the norms contradict the existing legislation, some need to be improved, because the experience of their application shows that they do not cover enough provisions that need to be regulated. So, for example, the licensing of such an activity as examination was canceled quite a long time ago. In DBN B.2.3-6:2009, on the other hand, the presence of a license is a mandatory requirement. DSTU 9123:2021 reflects the current state of affairs and settles the contradictions that arose during the application of DBN B.2.3-6:2009. In the future, it is necessary to review DBN B.2.3-6:2009, in particular, to remove the procedural provisions that are already available in DSTU 9123:2021, to refer to it in the regulations so that it becomes mandatory to apply.
Purpose. Analyze the documentation of examination and testing of bridges and pipes. Consider the differences between DBN B.2.3-6:2009 and DSTU 9123:2021. Establish the specifics of the application of the provisions of DSTU 9123:2021. State the prerequisites for the emergence of certain provisions available in DSTU 9123:2021, which are different or absent from DBN B.2.3-6:2009.
Materials and methods. During the development of DSTU 9123:2021, the experience of surveys and tests of transport facilities was taken into account, both by analyzing the data developed at the State Enterprise «DerzhdorNDI», NTU, and leading experts in the industry by sending them the draft
DSTU 9123:2021 for consideration and receiving comments. The analysis of the legislation in construction was carried out in the part of inspection of transport facilities. A comparative analysis of the provisions of DBN B.2.3-6:2009 and DSTU 9123:2021 was carried out.
Results. It has been established that the appearance in DSTU 9123:2021 of a clear division of planned inspections into preliminary and detailed, as well as the corresponding lists of works, allows us to more clearly define tasks and makes it possible to perform preliminary inspections to determine the condition of structures. Applying DSTU 9123:2021, it is possible to carry out unscheduled special preliminary inspections for destroyed buildings that have been damaged by weapons. For such structures, at the initial stage, it is possible to establish the actual condition of the structure, the need, if necessary, for a detailed inspection and the scope of this inspection at a relatively small cost.
It was established that in DSTU 9123:2021, the periodicity of scheduled inspections of bridges has been supplemented and optimized, in comparison with DBN B.2.3 6:2009. In particular, the requirements for the inspection of wooden bridges have been supplemented. The presence of this provision now makes it possible and obliges them to be inspected periodically, which, in turn, will increase the safety of their operation.
It has been established that DSTU 9123:2021 establishes the periodicity of bridge inspections in accordance with the specified classification of inspection types. The established periodicity of inspection of railway bridges, which is determined separately from others, will allow better planning of inspection works, since there is a less differentiated division regarding the age of bridges. This will allow, in particular, in many cases, to carry out an inspection with a longer period, while, in particular, within the distance of the track, which is important in case of difficult accessibility of inspection objects. At the same time, available unscheduled special inspections will allow to respond to changes in the condition of bridges discovered during periodic inspections.
Conclusions. A comparative analysis of DBN B.2.3-6:2009 and DSTU 9123:2021 regarding the classification of types of inspections, frequency of planned inspections of bridges and pipes, documentation of bridge inspections, testing of bridges and pipes showed that the norms do not cover enough provisions that need to be regulated. Instead, DSTU 9123:2021 contains provisions that regulate these issues and correspond to the existing legislation on the inspection of transport facilities. The prerequisites for the emergence of certain provisions available in DSTU 9123:2021, which are different or absent from DBN B.2.3-6:2009, are given. The peculiarities of the application of the provisions of DSTU 9123:2021 have been established. Approbation of DSTU 9123:2021 will reveal the need for further improvement of its provisions and tasks, which will need to be solved during the revision of DBN B.2.3-6:2009.
