Engineering Digital Seismographic Survey System

Main Application:

Building base, roadbed and foundation engineering detection

Cavity survey, cavern survey

Quaternary overburden layer delamination

Foundation soil type and dangerous geology body survey

Foundation soil medium physical property delamination survey

Foundation stabilization and roadbed backfill rolling survey

Bedrock depth and concealed geology structure prospecting

Tunnel construction detection

Tunnel line survey and wall rock classification

Concrete lining quality detection

Tunnel bottom detection and leading exploration

Tremor monitoring

Large and medium reservoir monitoring

Dykes and dam incipient fault detection

Reservoir sedimentation survey and exclusion sedimentation quality inspection

Large and medium dam jackstone inspection

Bridge engineering inspection

Bridge pier foundation inspection

Bridge pier concrete inspection

Bridge tremor inspection

Environmental and geologic Engineering hazard detection and appraisal

Landslide, karst, mud and stone flow, dig-out area, active fault and other detection

Function:

Transient multifold Rayleigh wave prospecting

Shallow reflection survey

Shallow refraction survey

Wave speed (secondary wave) survey

Mutil-wave high density seismic reflection

Foundation pile inspection

Civil engineering quality detection

Site constant micro-tremor survey

Shake blasting survey

Technical Specification:

Channel: 24/48/96

Sampling points: 1024/2048/4096/8192/16384; several sampling point quantity for micro-tremor survey.

Sampling rate: 10μs,25μs,50μs,100μs,200μs,500μs,1ms,2ms,5ms,10ms,20ms; 1ms-200ms for micro-tremor survey

A/D Converter: 24 Digit

Signal overlaying enhancement: 32 Digit

Dynamic range: 144dB

Transmission bands: 0.1Hz~4000Hz

Noise: 1μV under whole frequency

Range consistency: ±0.2%

Phase position consistency: ±0.01ms

Distortion factor: ± 0.05%

Retardation: 0~9999ms

Input impedance: 20k

Channel crosstalk suppression: ≥90dB

Low-cut filter gradient: software filtering 

High-cur filter gradient: better than 72dB/times sound interval

50Hz wave trap: 40dB

Data format: SEG-2 

Working temperature: -10℃~+50℃ 90%RH 

Storing temperature: -20℃~+60℃

Power supply: DC12V 4A 

Weight: 12Kg 

Dimension: 524mm×428mm×206mm

Geophone Specification:

38Hz Vertical Geophone  (Shallow reflection & refraction)

60Hz Vertical Geophone  (Shallow reflection & refraction)

100Hz Vertical Geophone  (Seismic imaging profiling)

4Hz Surface Wave Geophone

Micro-tremor Geophone

Three-component Geophone (Suitable well diameter 58mm/89mm; suitable well depth 50-100m)