T/JSJTQX 56-2024 Technical Specification for Detection of Effective Prestressing Force Under Road Bridge Anchor: Back tension method

Scope

Scope: This document specifies the basic requirements, testing instruments, preparation for testing, testing procedures, evaluation, testing records, and reports for the detection of effective prestressing force under the anchors of highway bridges using the counter-pull method. This document is applicable to the detection of effective prestressing force under the anchors of post-tensioned prestressed components of highway bridges. Main technical content: Brief introduction to the "Technical Specifications for the Detection of Effective Prestressing Force under the Anchors of Highway Bridges - Counter-pull Method": The prestressing force under the anchors of post-tensioned prefabricated components is one of the important indicators for controlling the durability of bridges. For a long time, there has been no effective method for detecting the prestressing force under the anchors, and it could only be guaranteed by controlling the construction process. This standard research topic analyzes the working mechanism of prestressing force by non-destructive methods and formulates the technical specification for the detection of prestressing force by the counter-pull method. This document specifies the basic requirements, testing instruments, preparation for testing, testing procedures, evaluation, testing records, and reports for the detection of effective prestressing force under the anchors of highway bridges using the counter-pull method.

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