dredging research in china
TRANSCRIPT
www.dredging.org
Dredging Research in China
Clubavond Ceda Nederland
Transport & Offshore Services17 September 2009
Rotterdam
www.dredging.org
Contents
• Introduction• How is dredging organised in China?• The main Stake Holders• The main Dredging Contractors• The main Dredging Laboratories• Dredging Research• Conclusions
2
www.dredging.org
Introduction
• Yearly dredging market in China about 265 Mm3.• 2/3 is executed by the CCCC Group• 1/3 by others (mainly dredgers of the Ministry of
Water Resources)
• Dredging research is started in the 1990th
3
www.dredging.org 4
Dredging Contractors(Ministry of Transport and Communications)
China Communication Construction Company Ltd.(former called CHEC; China Harbour and Construction Company)
Divisions:• Infrastructure Design• Infrastructure Construction• Dredging• Port Machinery and Manufacturing• Other
www.dredging.org
Dredging Contractors (Ministry of Water Recourses)
• Many small Contractors with small equipment• Are different organised and have there own meetings
in China. • 100 dredgers project ??
5
www.dredging.org
Dredging Laboratories
• CCCC– Shanghai Dredging Company (Lab reconstructed)– Tianjin Dredging Company (plans to build one)– Guangzhou Dredging Company (????)
– Hohai University of Changzhou (Ministry of Education; formally Ministry of Water Recourses)
6
www.dredging.org
Laboratory of Shanghai Dredging Co.
7
www.dredging.org
Dredging Flume
8
www.dredging.org
Dredge Carriage
9
www.dredging.org
Irregular wave flume
10
www.dredging.org
Hopper Loading Model Test Facility
11
www.dredging.org
Sub-surface Dredging Test Facility
12
www.dredging.org
Experiments to improve an environmental cutter head
13
www.dredging.org
Hydro-cyclone Model Test Facility
14
www.dredging.org
Jet Water Nozzle Current Profile Measurement Facility
15
射流的沿程发散、衰减过程
www.dredging.org
Study on the improvement of the jet water coherency in
draghead
16
www.dredging.org
Experimental study on cutting of saturated hard compact soil with
draghead teeth
17
www.dredging.org
Draghead Model Test
18
www.dredging.org
Draghead Design
19
www.dredging.org
Study on High Efficiency Medium Pressure Dredge Pump
20
www.dredging.org
CSD Supervisory Control and Data Acquisition System
21
www.dredging.org
The laboratory of Tianjin Dredging Company
• Is under construction; plans for:– A long (1500 m) pipeline and pump facility ϕ 500 mm– A cutting tank– A sedimentation tank
22
www.dredging.org
Laboratory of the Hohai University
23
www.dredging.org
Cutting Tank under Construction
24
www.dredging.org
Cutting Tank ready for use
25
www.dredging.org
Pump and Pipeline Test Stand
26
www.dredging.org
Resistant test of 90º bend
27
www.dredging.org
Cutter head tests
28
www.dredging.org
Draghead Tests
29
www.dredging.org
Filling the tank with sand
30
www.dredging.org
Tank Operation Screen
31
www.dredging.org
The small Glass Model and Triaxial Test Stand
32
www.dredging.org
The Simulator
33
www.dredging.org
The research (Hohai)
• solid transport• pump performance• soil cutting• mathematical modeling• dredging simulation
In general applied research for contractors.Hardly fundamental (basic) research
34
www.dredging.org
Cutter Head Design
• Some articles about cutter head design are published• On Wodcon XVIII and other EADA/ CHIDA
conferences
35
www.dredging.org
Hydraulic transport (1)
36
www.dredging.org
Hydraulic transport (2)
37
www.dredging.org
Hydraulic transport (3)
38