1000kN Bending Testing Machine for Concrete duct piece

1000kN Bending Testing Machine for Shied Segment

1) Mechnical property: being property for concrete duct piece, test for pulling out with concrete duct piece.

2) Bending test with concrete duct piece: bending load for concrete duct piece, analyse deformation, crack and transformation.

3) Put duct piece on bending testing machine: ≥20mm rubber blanket put on loading point, 1/3 of span, distributive girder for bending load, grade of loading, every loading time ≥5min, record displacement of every point of every grade, crack of duct piece after loading for 10min, real value of cracked concrete duct piece, loading to designed load after loading for 30min, record Max. Crack, unload.

4) Dertermination of bending property: loading to design load after loading for 30min, there is no breaking of breaking width is less than 0.2mm, duct piece is determined to be meet requirement.

5) Choose typical crack if there is too much crack in the bending test. For example, first crack, wider and longer crack and so on.

6) 1000kN concrete duct piece bending testing machine is suitable for testing and researching with concrete duct piece, fiber concete duct piece, steel duct piece for Max. Loading, breaking test force, deflection of deformation.

7) Pulling testing machine for duct piece: pulling test with shield tunnel duct piece, steel duct piece, precast load part of center hole of precast concrete lining duct piece, test duct piece under pulling force, pulling property of lifting hole.

8) Shield duct piece pulling test adopts lifting bolts pulling test.

9) Put concrete duct piece on bending test, grade of loading, constant loading time ≥5min for every grade, record displacment of loading value for every test point of bolts of every grade, loading to design load of pulling force, constant loading for 30min, measure displacement of bolt once for 5min, record pulling load and displacement of bolt, check crack of concrete duct piece.

10) Pulling property of concrete duct piece: measure displacement of last 3 under design load, differences of adjacent displacement is less than 0.01mm, it is determined to be meet requirement of designing.

11) Pulling test with concrete duct piece is maily used to test whether lifting hole of embeded force parts meeting requirement or not, test whether meet design loading or not, not test to break.

12) Leakage property of concrete duct piece, under steadily design compression for 2h, check whether there is no water on inner camber surface, and check leakage of jointing point, in order to determine resist leakage of duct piece.

13) Put concrete duct piece on test device, pressing grade by grade, 0.2MPaa constant compression for 5min, 0.4MPa constant compression for 5min, 0.6MPa constant compression for 30min, 0.8 MPa constant compression for 2h, check leaking point and depth of leaking.

14) Leakage of concrete duct piece, check whether there is leakage on inner camber, and leaking height of side surface less than 50mm after constant comprssion for 2h, in order to dertermine whether duct piece is certificated.

15) If there is breaking of seal ring, fixing bolt and deformation of steel board, test should be stopped.

16) Horizontal fixing bolt of concrete duct piece should be tightened from middle to two sides grade by grade.

17) Outer camber surface is equal devided into 3 checking area, there are flushing port and drain hole in every area.

15 serise production

1) Electronic Universla Testing Machine: electronic univeral testing machine, electronic compression testing machine, electronic tensile testing machine, tensile testing machine at low and high temperature, desktop tensile testing machine, high polymer material testing machine, geotextile material testing machine, paper tuber compression testing machine, iron ore pelletizing testing machine, rock hardness testing machine, packing box compression testing machine, 300kN concrete flexure testing machine, flexure testing machine with multiple functions, cement stress compression testing machine, cement constant stress compression and flexure testing machine, pipes ring stiffness testing machine, static stiffness testing machine, large space ring stiffness testing machine, miniature biology mechanical testing system, small force of othopaedics department biology mechanical testing machine.

2) Torsion testing machine: material torsion testing machine, wire torsion testing machine, wire torsion and wrapping testing machine, transmission shaft torsion testing machine, semiaxis torsion testing machine, anchor bolt torsion testing machine, anchor bolt axial force and anchoring testing machine with multiple function, bone screw torsion testing machine, spring torsion testing machine, rotary switch torsion testing machine, self-lock screw torsion testing machine, bolt torsion testing machine, high strength connection pair torsion coefficient testing machine, soft material torsion testing machine, elastic material torsion testing machine, robot torsion testing machine, nut plate torsion testing machine, hardware tool torsion testing machine, valve and fitting torsion testing machine, cable closure torsion and bending testing machine, cardan joint torsion and fatigue testing machine, desktop small torsion testing machine, large torque testing machine, bent axle torsion testing machine.

3) Spring testing machine: spring compression testing machine, multiple working position spring tension and compression testing machine, large loading spring compression testing machine, steel plate spring compression testing machine, spring testing machine at low and high temperature, spring fatigue testing machine, multiple working position spring fatigue testing machine, multiple working position spring tension, compression and fatigue testing machine at high and low temperature, multiple working position air spring fatigue testing machine, torsion bar spring fatigue testing machine, spring torsion testing machine, standing type torsion testing machine, air spring testin machine, vehicle air spring stiffness testing machine, horizontal stiffness loading testing machine with spring, spring sleeving centering guide testing machine for composite property.

4) High and low testing system: high speed tensile testing system, low speed tensile testing system, high speed tensile testing system at low and high temperature, permanent creep testing machine, low speed stress corrosion testing machine, middle and high speed testing system.

5) Jack certification device：movable jack certification device, jack certification system, 300t/500t/650t/1000t/2000t jack compression testing machine, 30t/50t/60t jack of plane certification compression testing machine, 300t/500t650t/1000t /1200t/1500t/1800t/2000t fixed jack certification device, 1000t/1200t/1500t/1800t/2000t lage jack certification device, 10000t jack certification device.