SL 629-2014 in English
VALIDCode for water diversion lines engineering geotechnical investigation and surveying
- Issued on:2014-04-15
- Implemented on:2014-07-15
- File Format:PDF
- Delivery:Via email within 10 business days
$1,698.00
Introduction
Analysis of the core content of the specification
| Survey stage | Core tasks | Key technical requirements |
|---|---|---|
| Planning stage | Geological demonstration of the route plan | Compilation of 1:50,000 regional geological map Structural analysis of 150km range |
| Project proposal | Preliminary engineering geological evaluation | Preliminary determination of rock mass mechanics parameters 50-100km fault survey |
| Feasibility study | Determination of quantitative geological parameters | Special mapping of active faults Seismic safety assessment |
Detailed explanation of key technical clauses
1. Tunnel engineering geological classification
Article 3.0.7 of the specification clearly defines the standards for the classification of tunnel complexity:
- Simple tunnel: single lithology, undeveloped faults, no rock burst risk
- Complex tunnel: deep burial (>600m), active faults, high ground stress
2. Channel leakage control
Article 5.4.3 stipulates the leakage evaluation method:
Typical case: A Yellow River diversion project uses a water pressure test to determine the permeability k=1.2×10-5cm/s, combined with SL 373 specifications for leakage prediction.
Analysis of Standard Technology Evolution
Compared with the old version of the standard, SL 629-2014 has the following major breakthroughs:
- Added TBM construction suitability judgment standard (Appendix C)
- Refined loess tunnel evaluation system (Appendix D)
- Introduced advanced geological prediction method (Appendix H)
Implementation Suggestions
| Project Type | Critical Control Points |
|---|---|
| Deep Buried Tunnel | Ground Stress Test + Rockburst Prediction |
| High Fill Channel | Compactness Detection + Settlement Observation |
Note: During the construction phase, the supplementary investigation requirements specified in Chapter 9 should be strictly implemented.
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