CN102305844B - Soil pressure cabin model device for soil pressure balance shield construction soil body improvement experiment - Google Patents
Soil pressure cabin model device for soil pressure balance shield construction soil body improvement experiment Download PDFInfo
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- CN102305844B CN102305844B CN2011101369749A CN201110136974A CN102305844B CN 102305844 B CN102305844 B CN 102305844B CN 2011101369749 A CN2011101369749 A CN 2011101369749A CN 201110136974 A CN201110136974 A CN 201110136974A CN 102305844 B CN102305844 B CN 102305844B
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Abstract
The invention relates to a soil pressure cabin model device for a soil pressure balance shield construction soil body improvement experiment. The device comprises a soil cabin and a spiral soil discharging device. The soil cabin is a sealed container of which the upper part is provided with an opening; a soil cabin cover is arranged at the opening on the upper part and a soil sample pressurized by a lifting jack; a stirring rod is arranged in the soil cabin; the spiral soil discharging device is connected with the bottom of the soil cabin and can discharge soil out of the soil cabin; and the inclination angle of the soil discharging device can be changed in the range of between 20 and 40 degrees, and the upper part of the soil discharging device is provided with a soil discharging port. The device can stimulate the actual conditions in the soil cabin during shield driving, can monitor the change process of the soil cabin, pressure in the spiral soil discharging device and torque of the spiral soil discharging device during testing in real time, and comprehensively evaluate the performance of soil; the inclination angle of the spiral soil discharging device is changed and the influence of the inclination angle on pressure in a shield machine is researched; and the soil discharging amount of the spiral soil discharging device can be measured conveniently, the soil sample discharging efficiency of the spiral soil discharging device is researched, and reference is provided for shield construction parameter optimization.
Description
Technical field
The present invention relates to a kind of soil pressure cabin model test apparatus of soil body improvement test in construction of soil pressure balance shield, this device can be simulated the earth pressure balanced shield, EPBS work progress, estimate transmission force property, permeability, the mobility of soil sample, be applicable to the research of improvement soil body benchmark test and application in the balancing earth-pressure shielding machine construction, belong to simulation tunnel excavation test machines device.
Background technology
The earth pressure balanced shield, EPBS construction is a kind of bored tunnel job practices, its work progress is: the soil body in shield structure the place ahead enters native cabin through the cutterhead digging, the dregs of soil in cabin has the required creeping sexual state of shield-tunneling construction after by abundant mixing, the mineralization pressure gradient maintains native cabin pressure in the spiral dumper, and can discharge smoothly and realize driving continuously.Visible, in shield machine, the performance of the soil body has conclusive effect to its smooth, efficient construction, yet along with the soil layer scope of application shield-tunneling construction is constantly widened, the soil layer that excavates does not often reach the desired plasticity and fluidity of soil of shield-tunneling construction, has caused many construction problems.And in site operation, all rely on scene to grope to the improvement of the soil body or engineering experience is determined, the performance of the improvement soil body lacks corresponding evaluation method, model testing be generally acknowledge can improve than thoroughly evaluating the test method of soil capability.Existing model testing can be simulated the shield-tunneling construction process, and reaction improves the state variation of the soil body simply, as the Changing Pattern of improvement soil body soil pressure, shear strength and spiral dumper moment of torsion in the spiral dumper.But, and can not simulate shield-tunneling construction in native cabin in the truth of the soil body less to the pressure distribution of the soil body in native cabin and the research of pressure transfer law.Native country ballasting model equipment can be simulated the shield-tunneling construction process, reflects preferably the state variation of soil sample in shield-tunneling construction, as the stirring of the soil body in native cabin, studies improvement soil body soil pressure Changing Pattern in native cabin and spiral dumper; The soil improvement effect that compares different additive, thoroughly evaluating improvement soil capability, provide foundation for optimizing the additive formula scheme, is the laboratory testing rig that a kind of reliable evaluation improves soil capability.Yet there are no patent report and can realize the experimental rig of this function.
Summary of the invention
The present invention proposes a kind of soil pressure cabin model testing of soil body improvement test in construction of soil pressure balance shield, device mainly comprises native cabin system and spiral dumper system.This device can be simulated shield-tunneling construction, by changing angle of inclination and the relevant operational factor of spiral dumper, pressure state change procedure and the spiral dumper torque of the improvement soil body in the research shield machine, thoroughly evaluating improvement soil capability, optimize the additive formula scheme of soil improvement, improve the construction of shield machine in bad soil layer.
In order to achieve the above object, the present invention has taked following technical scheme.
A kind of soil pressure cabin model equipment of soil body improvement test in construction of soil pressure balance shield, it is characterized in that: this device comprises native cabin, native hatchcover, native cabin jack, stirring rod, stirring motor, native cabin support, concrete bed, spiral dumper, spiral dumper motor, helical rotation device, spiral dumper bearing jack, sensor; Wherein:
Sensor comprises soil pressure sensor, displacement transducer 32 and torque sensor 37; Displacement transducer 32 1 ends are fixed on native hatchcover 3 upper surfaces, and the other end is fixed on support 1; In the middle of soil hatchcover 3, native hatchcover soil pressure sensor 33 is set, the setting of soil bulkhead equal intervals is no less than 4 native bulkhead soil pressure sensors 34, soil Ceiling center arranges native Ceiling soil pressure sensor 36, and the 8 equal intervals settings of spiral dumper are no less than 3 dumper soil pressure sensors 35; Spiral dumper 8 ends arrange torque sensor 37.
The present invention has following advantage:
The truth of the soil body in soil cabin when the present invention can simulate shield driving, monitor the pressure state change procedure of soil sample in native cabin in tunneling process, spiral dumper in detail, and thoroughly evaluating is improved soil capability; By changing spiral dumper angle of inclination, study its impact on soil pressure in shield machine; Conveniently measure the unearthed amount of spiral dumper, the unearthed efficiency of the spiral dumper of research soil sample, provide reference for optimizing the shield-tunneling construction parameter.
The accompanying drawing explanation
Fig. 1 is the structural representation of the soil pressure cabin model equipment of a kind of soil body improvement test in construction of soil pressure balance shield of the present invention;
Fig. 2 is native cabin mixing plant schematic diagram in the present invention;
Fig. 3 is spiral dumper tumbler schematic diagram in the present invention;
Fig. 4 is the structural representation of spiral dumper in the present invention;
Fig. 5 is the structural representation of spiral dumper transmission device in the present invention;
Fig. 6 is sensor location figure in the present invention.
In figure: 1, soil cabin support, 2, soil cabin jack, 3, the soil hatchcover, 4, stirring rod, 5, the soil cabin, 6, stir motor, 7, concrete bed, 8, the spiral dumper, 9, spiral dumper tumbler, 10, spiral dumper bearing jack, 11, spiral dumper motor, 12, soil-discharging port, 13, spiral dumper bearing, 14, screw rod, 15, power transmission shaft, 16, bolt, 17, circular fixed head, 18, the pulley sealing device, 19, flange, 20, the stainless steel steel ball, 21, outer rotation spherical shell, 22, interior rotation spherical shell, 23, bolt hole, 24, axle in the spiral dumper, 25, spiral dumper urceolus, 26, helical blade, 27, bolt, 28, the soil output fastening devices, 29, the pulley sealing device, 30, steel pipe, 31, power transmission shaft, 32, displacement meter, 33, soil hatchcover soil pressure pressure gauge, 34, soil bulkhead soil pressure pressure gauge, 35, spiral dumper soil pressure sensor, 36 native Ceiling soil pressure sensors, 37, torque sensor.
The specific embodiment
1～Fig. 6 is described in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, native cabin 5 is upper opening cuboid container, has sealing preferably, can bear the pressure of 0.3Mpa, and bottom is fixed on concrete bed 7.5 both sides, soil cabin are provided with support 1, on the support 1 of 5 tops, soil cabin, establish a crossbeam, flexible vertically downward native cabin jack 2 is installed at the crossbeam center, soil cabin jack 2 connects native hatchcover 3, around soil hatchcover 3, has the hermetic seal bar, soil cabin jack 2 is by the interior soil sample pressurization in 3 pairs of native cabins 5 of native hatchcover, and the stroke of native cabin jack 2 can reach 800mm.5 inside, soil cabin are provided with stirring rod 4, and stirring rod 4 is crossed the inside in native cabin 5, and stirring rod 4 connects the stirring motor 6 of 5 outsides, native cabin, circular open is arranged at the bottom of soil cabin 5 one sides, opening connects spiral dumper tumbler 9, the inner spiral dumper 8 that connects of spiral dumper tumbler 9, spiral dumper 8 inside are screw rods 14, the gap of screw rod 14 external diameters and dumper 8 is in the 5mm left and right, end below near spiral dumper 8 is provided with the circular soil-discharging port 12 that diameter is 160mm, screw rod 14 ends connect spiral dumper motor 11, spiral dumper 8 and motor link together and are fixed on bearing 13 by spiral dumper bearing jack 10, can change by the lifting of spiral dumper bearing jack 10 angle of inclination of spiral dumper 8.
As shown in Figure 2, described native cabin mixing plant is comprised of fixed head 17, power transmission shaft 15 and stirring motor 6.Stirring rod 4 makes to be fixed by bolts on fixed head 17, power transmission shaft 15 is used bolt 16 to be fixed on plate 17 centers, fixed head 17 is close to the inwall in native cabin 5, fixed head 17 is connected with the stirring motor 6 of 5 outsides, native cabin by power transmission shaft 15, and power transmission shaft 15 passes native bulkhead and is provided with pulley sealing device 18.
As shown in Figure 3, described spiral dumper tumbler 9 is comprised of stainless steel steel ball 20, interior rotation spherical shell 22, outer rotation spherical shell 21, flange 19.Interior rotation spherical shell 22 forms an overall structure by stainless steel ball 20 and outer rotation spherical shell 19, can change by the mutual changing of the relative positions of the rotation of steel ball 20 angle of inclination of spiral dumper 8 between interior rotation spherical shell 22 and outer rotation spherical shell 21.Interior rotation spherical shell 22 is connected with spiral dumper 8 initiating terminals, and outer rotation spherical shell 21 is fixed on spiral dumper 8 devices on native cabin 5 by flange 19.
As shown in Figure 4, described spiral dumper 8 is comprised of spiral dumper urceolus 25, screw rod 14 and soil-discharging port 12.Urceolus 25 is that thickness is the cylinder of 10mm, and inside is the screw rod 14 parallel with urceolus 25, and the gap between urceolus 25 is the 5mm left and right.Screw rod 14 is comprised of axle in screw rod 24 and blade 25, and blade 25 is the steel plate of 40mm for width, and thickness is 10mm, and spiral welded is in screw rod on axle 24.Near urceolus 25 ends, diameter being arranged is the opening 12 of 160mm, and interior shaft end has two adjacent bolts hole 23.
As shown in Figure 5, described spiral dumper transmission device is comprised of bolt 27, soil output fastening devices 28, pulley sealing device 29, steel pipe 30, power transmission shaft 31 and spiral dumper motor 11.Soil output fastening devices 28 is cylinders, central opening, diameter is identical with urceolus 25 diameters and be fixed on urceolus 25, a steel pipe 30 is passed at soil output fastening devices 28 centers, by 29 sealings of pulley sealing device, steel pipe 30 diameters are identical with axle 24 internal diameters in the spiral dumper, and deeply interior axle 24 1 segment distances of steel pipe 30 left ends are also used bolt 27 to fix with it, and steel pipe 30 other ends are connected with motor shaft 31.
As shown in Figure 6, described sensor comprise on native hatchcover, soil pressure sensor, displacement transducer and torque sensor on native bulkhead, native Ceiling and spiral dumper.Displacement transducer 32 1 ends are fixed on native hatchcover 3 upper surfaces, and the other end is fixed on support 1, and range is 1000mm.Native hatchcover soil pressure sensor 33 is set in the middle of soil hatchcover 3 and measures native cabin 5 top soil pressures, the setting of soil bulkhead equal intervals is no less than 4 native bulkhead soil pressure sensors 34 and measures the soil pressure variation, soil Ceiling center arranges native Ceiling soil pressure sensor 36, on spiral dumper 8, be no less than 3 dumper soil pressure sensors 35 with spaced set and measure the soil pressure variation, above all soil pressure sensor ranges are 0～0.6Mpa, and precision is 0.5%.Spiral dumper 8 bottoms arrange rotating speed and the moment of torsion that torque sensor 37 is measured the spiral dumper.
During use, operating procedure is as follows: prepare about 0.3m
3Soil sample, the native hatchcover 3 that raises, pack soil sample in native cabin 5 into, with soil sample, fills up native cabin 5 and be advisable, and starts 2 pairs of soil bodys of native cabin jack and be pressurized to setting pressure; Start and stir motor 6, rotate the interior stirring rod 4 in native cabin 5, the setting rotational angular velocity is 5rev/min, and the simulation cutterhead rotates, and fully stirs the soil body in native cabin 5; Start spiral dumper bearing jack 10, adjust the angle of inclination of spiral dumper 8; Open spiral dumper opening 12, start spiral dumper motor 11, set spiral dumper 8 rotating speeds, in the casting process, maintain native cabin jack pressure 2 constant, when native cabin jack 2 ranges reach 600mm, close spiral dumper motor 11, clear up the dregs in native cabin 5 and spiral dumper 8.
Claims (1)
1. the soil pressure cabin model equipment of a soil body improvement test in construction of soil pressure balance shield, it is characterized in that: this device comprises native cabin, native hatchcover, native cabin jack, stirring rod, stirring motor, native cabin support, concrete bed, spiral dumper, spiral dumper motor, helical rotation device, spiral dumper bearing jack and sensor; Wherein:
Soil cabin (5) is the closed container of a upper opening, and bottom is fixed on concrete bed (7); The native cabin support (1) of top, soil cabin is established a crossbeam, and flexible vertically downward native cabin jack (2) is installed at the crossbeam center, and jack connects native hatchcover (3), around native hatchcover, has the hermetic seal bar; Inside, soil cabin (5) is provided with stirring rod (4), stirring rod (4) is fixed on fixed head (17), fixed head (17) is close to the inwall of native cabin (5), crosses the inside of native cabin (5), and is connected by the outside stirring motor (6) in power transmission shaft (15) and native cabin (5); Soil cabin (5) one side lower parts connect spiral dumper (8) by spiral dumper tumbler (9); Spiral dumper tumbler (9) is comprised of steel ball (20), interior rotation spherical shell (22), outer rotation spherical shell (21), flange (19); Interior rotation spherical shell (22) forms an overall structure by stainless steel ball (20) and outer rotation spherical shell (19); Interior rotation spherical shell (22) is connected with spiral dumper (8) initiating terminal, and outer rotation spherical shell (21) is fixed on native cabin (5) by flange (19); Spiral dumper (8) inside is screw rod (14), end below near spiral dumper (8) is provided with soil-discharging port (12), screw rod (14) end connects spiral dumper motor (11), spiral dumper (8) and spiral dumper motor (11) link together, and spiral dumper (8) and spiral dumper motor (11) are fixed on spiral dumper bearing (13) by spiral dumper bearing jack (10);
Sensor comprises soil pressure sensor, displacement transducer (32) and torque sensor (37); Displacement transducer (32) one ends are fixed on native hatchcover (3) upper surface, and the other end is fixed on native cabin support (1); Native hatchcover soil pressure sensor (33) is set in the middle of soil hatchcover (3), the setting of soil bulkhead equal intervals is no less than 4 native bulkhead soil pressure sensors (34), soil Ceiling center arranges native Ceiling soil pressure sensor (36), and spiral dumper (8) equal intervals setting is no less than 3 dumper soil pressure sensors (35); Spiral dumper (8) end arranges torque sensor (37).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101369749A CN102305844B (en) | 2011-05-24 | 2011-05-24 | Soil pressure cabin model device for soil pressure balance shield construction soil body improvement experiment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101369749A CN102305844B (en) | 2011-05-24 | 2011-05-24 | Soil pressure cabin model device for soil pressure balance shield construction soil body improvement experiment |
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| CN102305844A CN102305844A (en) | 2012-01-04 |
| CN102305844B true CN102305844B (en) | 2013-11-27 |
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| CN2011101369749A Expired - Fee Related CN102305844B (en) | 2011-05-24 | 2011-05-24 | Soil pressure cabin model device for soil pressure balance shield construction soil body improvement experiment |
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| CN104849429B (en) * | 2015-05-08 | 2016-05-25 | 上海城建市政工程（集团）有限公司 | With the shield structure ground adaptability method of testing of native cabin simulation |
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| CN108506004B (en) * | 2018-03-11 | 2019-08-09 | 北京工业大学 | Soil pressure transfer law device and method inside model shielding machine in active destructive process |
| CN108489745A (en) * | 2018-03-11 | 2018-09-04 | 北京工业大学 | A kind of variable cross-section soil pressure balancing type tunnel shielding simulation experiment system |
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| JP2966278B2 (en) * | 1994-03-17 | 1999-10-25 | 住友重機械工業株式会社 | Soil measurement device |
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Patent Citations (5)
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| CN201397283Y (en) * | 2009-05-15 | 2010-02-03 | 河海大学 | Construction site concrete rheology behavior dynamic inspection device |
| CN201497692U (en) * | 2009-07-10 | 2010-06-02 | 天津市建筑科学研究院 | Numerically controlled intelligent tester of concrete viscosity |
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| CN202092933U (en) * | 2011-05-24 | 2011-12-28 | 北京工业大学 | Earth pressure cabin model device for earth improvement test in earth pressure balance shield construction |
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