Seismograph for Downhole Test 

Main functions

• transient multi-channel surface wave (Rayleigh wave) exploration
• shear wave velocity measurement
• pier inspection
• construction quality inspection
• multi-component high-density seismic imaging
• shake blow up measurement
• field long-term jiggle measurement
• shallow refraction and reflection 

Applications

(1) Groundwork, roadbed and foundation engineering inspection

• Groundwork, roadbed cavity and karst exploration;
• Quaternary coverage delamination;
• Foundation soil type sorting and disease geology investigation;
• Physical property delaminating investigation of base soil;
• Base reinforcement and roadbed refill grinding quality inspection.

(2) Tunnel engineering inspection

• Tunnel line survey and surrounding rock sorting;
• Concrete underlayer quality check;
• Tunnel bottom check and forward detection;
• quake monitoring.

(3) Large- or medium-scale water reservoir monitoring

• dam hidden trouble inspection;
• Water reservoir bottom sentimental soil and cleanup inspection
• Placed objects inspection at large- or medium-scale water hinge site.

(4) Bridge engineering inspection

• bridge pier base type investigation;
• bridge pier concrete quality inspection;
• bridge quake monitoring.

(5) Environmental and geological disaster inspection and evaluation

• landslide, karst, mudstone flood, mine-out area, active fault investigation.