Views:0 Author:Site Editor Publish Time: 2016-07-08 Origin:Site
This project is CPC Corporation, Taiwan second natural gas pipeline, which reduces Taichung natural gas operation interruption risk, it mainly crosses Taichung port channel, steel pipe material, diameter Ø660mm, crossing length 1449m.
Owner party: CPC Corporation, Taiwan
Construction party: Taiwan Resources Engineering Services Inc.
Construction unit: India TESPL company.
Project characteristic: Steel pipe Ø660mm×1449m directional drilling Taichung port channel sets the history record of 350T hdd machine Taiwan area trenchless.
Soil condition: silty fine sand with thin layer of clay, part backfill crushed stone, undersea quicksand strata etc.
Terrian condition: max. depth drilling port channel reaches 60m, cross breakwater. The channel water depth is 16m, width about 300m.
Construction difficulty: silty fine sand with thin layer of clay and undersea quick sand starta makes the hole difficult, pipe self-weight is above 300t, so in the process of project, using excavator to lift, pulley bracket etc. to reduce pie and ground friction resistance.
Picture1: Taichung port channel in Taiwan
Horizontal directional drilling machine is Goodeng Machine GD3500-LS, locating system is USA ParaTrack 2 Geomagnetic guide, mud pump is Japan Mitsubishi F500(2000L/min).
Picture 2: Goodeng Machine GD3500-L(S) main rig
Picture 3: Goodeng Machine GD3500-L(S) rig operation cab
Picture 4: USA Paratrack2 locating system
Picture 5: Japan Mitsubishi F500 mud pump(2000L/min)
Picture 6: project site
Picture 7: Tracking is going on
Picture 8: 30inch (762mm) reaming is going on.
Picture 9: 42inch(1067mm) reaming is going on.
Picture 10: 40inch(1016mm) hole cleaning is going on
Bentonite amount: 800ton.
Mud proportion: 4% normal bentonite, 0.15% salt resistance tackifier, 0.15% lubricant.
Mud parameter: Marsh funnel viscosity 55S-65S, apparent viscosity 26mpa.s, plastic viscosity 12mpa.s，yield value 8pa.
Picture 11: Prepare before pull the pipe
Picture 12: Pulling the pipe starts.
Picture 13: Pulling pipe going on
Picture 14: Pulling pipe succeeds-the moment out from ground
Picture 15: Owner construction unit take pcs with rig