DL/T 5050-2000 in English

This code specifies the technical requirements and construction quality of the exploratory adits, shafts and trenches for water resources and hydropower project, and it is applicable to the exploratory shafts, shallow shafts, exploratory trenches, adits, inclined shafts, vertical shafts and adits at river bed in the geologic examination of water resources and hydropower project.

Foreword I
1 Scope
2 Normative References
3 General Provisions
4 Mission Assignment and Construction Preparation
5 Quality of Tunnel Exploration Engineering
6 Basic Provisions on Safety Technology
7 Exploratory Adits, Shallow Shafts and Exploratory Trenches
8 Adits
9 Inclined Shaft, Vertical Shaft and Open Caisson
10 Adits at River Bottom
11 Mechanical Operation and Maintenance of Exploratory Adits, Shafts and Trenches
Annex A (Informative) Transporting Power of Different Distances and Different Linear Diameters
Annex B (Informative) Characteristics of Rock Drill
Annex C (Informative) Pressure Loss of Air Pipe
Annex D (Informative) Consumption of Explosives for per Cubic Meter of Solid Rock of Different Classes
Annex E (Informative) Conversion of the Consumption of Different Explosives
Annex F (Informative) Characteristics of Explosives
Annex G (Informative) Explosive Load of Periphery Holes per Meter for Smooth Blasting