Strain testing system for roadway concrete spraying layer

The utility model relates to the technical field of sprayed concrete detection, in particular to a strain test system for a roadway concrete spraying layer, which comprises a strain sensor, a signal cable and a data acquisition instrument, the strain sensor is pre-embedded in the concrete spraying layer and is used for monitoring the internal strain of the concrete spraying layer, and the signal cable is connected with the data acquisition instrument. One end of the signal cable is connected with the strain sensor, the other end of the signal cable penetrates out of the concrete spraying layer and is detachably connected with the data acquisition instrument outside the concrete spraying layer, the signal cable is used for transmitting the strain data, and the signal acquisition instrument is used for displaying the strain data. Therefore, the internal strain of the concrete spraying layer can be reflected. Therefore, the size of the dependent variable of the concrete spraying layer can be directly known, whet