Shanghai Jintai Engineering Machinery Co., Ltd.
Engineering Equipment, Hydraulic Diaphragm Wall Grab Manufacturer
HomeEngineering MachinerySG series Hydraulic Diaphragm Wall Grab
Hydraulic Diaphragm Wall Grab

SG series Hydraulic Diaphragm Wall Grab

Working Principle of Hydraulic Diaphragm Wall Grab:
1. Making guide wall;
2. The machine digs along the guide wall; and at the same time, using inclinator to measure the verticality;
3. Adjust the grab verticality to keep the wall precision;
4. Slurry should be used to prevent wall collapse;
5. And finally clean the wall bottom, place the cage and then concrete the cement.
Features of Hydraulic Diaphragm Wall Grab:
1. Low vibration and noise, so it can also work during night;
2. Electron detector, inclinometer and hydraulic push-plate are equipped to control the depth and verticality;
3. High wall strength: thus the walls can bear huge side pressure and avoid groundsill sinking and landslip;
4. Good penetration resistance;
5. Cost Saving: functions like soil retaining, water stealing and weight bearing, etc are all integrated;
6. Can be used as the rigid foundation to replace shafts, and other foundation.
Applications of Hydraulic Diaphragm Wall Grab:
The Hydraulic Diaphragm Wall Grab can be used in the deep pit wall of subway, underground works, garage and street, as well as in underground transformer substation and high building's basement.
It especially can be used in deep pit wall in dense buildings of cities.
Construction Procedure:

Guide Wall:

Parameters of Hydraulic Diaphragm Wall Grab:

Technical Parameters              
Model of base carrier SG22 SG35C SG40B SG46 SG46E SG50 SG60
Wall width (m) 0.3-0.6 0.3-1.0 0.35-1.2 0.35~1.2 0.35~1.2 0.35-1.5 0.35-1.5
Wall depth (m) 45 50 60 75 75 80 100
Max. pull up force (kN) 220 350 400 460 460 500 600
Single wire pulling force of winch (kN) 140 180 2×200 2×230 2×230 2×250 2×300
System pressure (MPa) 30 33 33 33 33 30 33
Main pump flow (L/min) 2×230 2×260 2×288 2×380 2×280 2×380 2×380
Weight of grab (t) 6~10 9~18 9~20 15~22 15~22 15~26 15~30
Total weight (w/o grab) (t) 45 58 62 69 62.5 87.1 92.1
Dimensions              
Mast height(mm) 15000 15550 15890 15890 16700 17750 18260
Grab's highest position (mm) 13000 14100 14450 14450 14100 14800 14300
Overall crawler length (mm) 5090 5360 5360 5680 5470 6020 6020
Distance between the grab center and rotary center (mm) 3500-4300 3450-4810 3450-5180 4500-5316 3450-4815 4100-5500 4100-5620
Distance between the rotary center and rear end (mm) 3800 4025 4140 4160 4400 4560 4605
Base Machine              
Diesel Cummins 6BTA5.9-C Cummins C8.3-C Cummins QSL Cummins QSM11-C Caterpillar C-9 Cummins QSM11-C Cummins QSM11-C
Max. rotation speed (rpm) 2100 1900 1850 1900 1800 1900 1800
Rated engine output (kW) 133 196 221 263 261 263 298
Retractable crawler undercarriage              
Model of undercarriage JT45 R305LC-9 JT70 R385LC-9 JT70 R455LC-7 JT80 CAT330D TC325VH R505LC-7 JT90 SH36-R455LC-7 JT90
Track shoe outer distance (mm) 3000-4100 3000-4300 3200-4300 3300-4400 3000-4300 3400-4600 3450-4600
Track shoes width (mm) 800 800 800 800 800 800 800
Towing force (kN) 280 500 500 500 500 630 630
Crawler speed (km/h) 1.5 1.5 1.5 1.5 1.5 1.5 1.5
Transport Weight (kg)              
Weight of base carrier with lower mast, winch, counter weight, boom cylinder and hose drum (kg) 41500 54500 58200 64500 58080 82100 86100
Wherein: counter weight (kg) 10000 12000 15000 17600 8450 22400 20600
Upper mast, mast head 3500 3500 3800 4500 4420 5000 6000


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