METHOD OF MONITORING WATER PERMEABILITY OF MOVEMENT JOINTS OF HYDROTECHNICAL STRUCTURES Russian patent published in 2008 - IPC E02B3/16 

FIELD: technological processes.

SUBSTANCE: invention is related to methods of determination of water losses for filtration through movement joints of antifiltering coats of water conducting hydrotechnical structures. For monitoring water permeability of movement joints of hydrotechnical structures, mostly of antifiltering coats of water conducting channels and reservoirs, flaw detection is carried out of joints test models made of different sealant materials and movement joints made of identical sealants in actual structures of buildings with ultrasonic longitudinal profiling by means of installation of radiator and receiver of ultrasonic oscillations (USO) at joined elements at the distance of not more than 20 mm from their end edges to axes of installed radiator and receiver and at the same distance from joint axis. In test models of joints and in movement joints of actual structures of buildings time and speed of USO longitudinal waves distribution is measured, water permeability is determined for test models of movement joints made of different sealants, and by results of ultrasonic and filtering tests family of calibration dependences "ultrasound - coefficient of permeability" is established for joints made of different sealants. According to corresponding working calibration dependence and performed full-scale measurements of USO longitudinal waves distribution speed in actual joints, water permeability of movement joints is determined in hydrotechnical structures that are sealed with specific sealants. In order to implement the suggested method in specific conditions of operation, family of calibration dependences "ultrasound speed - coefficient of joint permeability" is established for different humidity values of sealant materials in test models of joints. When measuring speed of USO longitudinal waves distribution speed in actual structures of movement joints, humidity of their sealant materials is determined, and on the basis of working calibration dependence for specific sealant material of joints with humidity that is equal to humidity of identical sealant material of movement joint in building structure, water permeability of movement joints in actual conditions is determined.

EFFECT: reduction of manhours; cost and duration of research works on determination of water permeability of movement joints of hydrotechnical structures with provision of measurements high accuracy and possibility of practical realisation for filtering tests of antifiltering structural elements of structures.

2 cl, 2 dwg, 1 ex