TBM in Gravel-Sand Matrix_CDM

SPB
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Operating parameters
Speed Torque PR
Value
1.4～ 1.6
2500~ 3500
15～ 20
Site Geology and Pebble-Sand Matrix
TBM Selection and Design Performance of TBM Problems and Solutions Lessons Learned
Laboratoire de Mécanique des Roches − LMR
TBM Selection and Design S392
Cutter type Gauge Roller cutter,17″
Roller cutter ,17″ Center cutter Teeth cutter
Sector Teeth cutter
Number 12 20 4 28
8
Laboratoire de Mécanique des Roches − LMR
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
The project described is metro line tunnels in Chengdu city, southwest China. There are 7 metro lines in planning communication network, 274.15 km length overall.
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Chengdu city is situated on a basin, resulted from Eurasian Plate impact, surrounded by mountains. The geological feature of Chengdu area is the alluvial depositions composed with eight alluvial fans. Very deep loose sediment, sandstone and mudstone of Jurassic System and cretaceous were distributed abroad. With different surface water flow seasons, deposits of different sizes can be found, ranging from pebbles to silt.
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
TBM Tunnelling in Pebble-Sand Matrix
Start
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
CHINA RAILWAY 13TH BUREAU GROUP CORPORATION
TBM Selection and Design
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
TBM Selection and Design
At beginning, one section was selected as trial run, a EPB and a slurry were selected.
Average value: 38.2336 Variance: 26.4968
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Pebble-Sand Matrix
Pebble size is usually up to 80 mm. However, there is possibility of having pebbles of large sizes. Pebbles of up to 500 mm have been seen in building foundations. The large size pebbles are usually granitic rocks with uniaxial compressive strength of up to 200 MPa when it is fresh.
Unit
rpm KN.m mm∕r
Advance 10～ 20
mm／min
Thrust 900～ t 1200
The cutterhead of both EPB and slurry shields are basically a mixed cutterhead, combining roller cutters (for hard rocks) and teeth (for soils).
The cutterhead has relative large opening (up to 40 cm diameter) for the pebbles.
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Site Geology and Pebble-Sand Matrix
TBM Selection and Design
Performance of TBM Problems and Solutions Lessons Learned
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Maximal Diameter (mm)
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Pebble-Sand Matrix
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Site Geology and Pebble-Sand Matrix TBM Selection and Design
Performance of TBM
TBM Tunnelling in Pebble-Sand Matrix
Master of Advanced Studies “Tunnelling”
TBM Tunnelling in Mixed Face – Large Pebble-Sand Matrix
Associate Professor M.Zh. Gao
Pebble-Sand Matrix
30.00% 25.00% 20.00% 15.00% 10.00% 5.00% 0.00%
7.5 15 25 35 45 55 65 75 85 95 105 115 125 135 145 1le size(mm)
Pebble-Sand Matrix
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
>20mm pebble content
Percent
Laboratoire de Mécanique des Roches − LMR
Problems and Solutions Lessons Learned
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Performance of TBM
The TBM performance data till January 27th, 2008 were collected from the contractors. All the results shown below are based on the collected data recorded automatically by TBM acquisition system and time study result by HAG.
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Original design
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
S365:EPB
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Screw
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Cutter type
Laboratoire de Mécanique des Roches − LMR
Tunnelling
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Performance of TBM
CDM line #1 The diameter of EPB=6250 mm
Table 1
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Representative Drills
Laboratoire de Mécanique des Roches − LMR
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix
Laboratoire de Mécanique des Roches − LMR
Tunnelling
TBM Tunnelling in Pebble-Sand Matrix