CN103115787A - Testing platform used for soil modification research of earth pressure balance shield - Google Patents
Testing platform used for soil modification research of earth pressure balance shield Download PDFInfo
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- CN103115787A CN103115787A CN2011103657755A CN201110365775A CN103115787A CN 103115787 A CN103115787 A CN 103115787A CN 2011103657755 A CN2011103657755 A CN 2011103657755A CN 201110365775 A CN201110365775 A CN 201110365775A CN 103115787 A CN103115787 A CN 103115787A
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Abstract
The invention relates to a testing platform used for a soil modification research of an earth pressure balance shield. A simulated thrust oil cylinder is connected with a thrust piston through a cover board of a simulated shield body to form a thrust system of the testing platform. A stirring device is formed by that a stirring diving motor is connected with a stirrer through a reducer. A spiral conveyer is formed by that a spiral driving motor drives a spiral conveying device through the reducer. The spiral conveyer is connected with a slag outlet of the simulated shield body. The simulated shield body is installed above a shield body turnover platform. A turnover oil cylinder is connected with the shield body turnover platform to control turnover of the simulated shield body. A soil box is arranged on the shield body turnover platform and below a slag outlet of the spiral conveyer. A personal computer (PC) is adopted to control the testing platform. The testing platform can provide a theoretical foundation for soil modification of the earth pressure balance shield, and is simple in structure and convenient to operate.
Description
Technical field
The present invention relates to a kind of test platform, relate in particular to a kind of test platform for the research of earth pressure balanced shield, EPBS soil improvement.
Background technology
For present earth pressure balanced shield, EPBS condition of construction, extensively there is the sediment improvement problem, because dregs stream plasticity is poor, cause the critical component heel and toe wears such as Construction control difficulty (ground caves in, surface uplift), drivage efficiency are low, cutterhead etc., add soil improvement in the earth pressure balanced shield, EPBS construction is lacked theoretical direction, make to exist some blindly to work in the practice, cause the waste of human and material resources resource.
Summary of the invention
The object of the present invention is to provide a kind of test platform for the research of earth pressure balanced shield, EPBS soil improvement.
Test platform of the present invention from simulation earth pressure balanced shield, EPBS pressure process, simulation shield tunneling process, realize advancing and dregs stirs, the simulation worm conveyor is unearthed and soil plug effect implementation procedure, realize that the aspects such as in proportion adding of sediment improvement agent (foaming agent, polymkeric substance, discrete agent etc.) further investigate the gross data of earth pressure balanced shield, EPBS soil improvement, for the soil improvement in the earth pressure balanced shield, EPBS construction gives theoretical direction, this test platform is simple in structure, and is easy to operate.
Test platform of the present invention is achieved through the following technical solutions:
A kind of test platform of earth pressure balanced shield, EPBS soil improvement research comprises the simulation propelling cylinder, adds native hole, overturning oil cylinder, propelling piston, simulation shield body, netted dividing plate, access hole, simulation Tu Cang, stirring apparatus, worm conveyor, native case, bracing frame, shield body overturn platform, melt pit bearing; Wherein, the simulation propelling cylinder connects the propulsion system that propelling piston consists of test platform by simulation shield body cover plate; Stirring apparatus forms by reductor connection stirrer by stirring drive motor; Worm conveyor is that the screw drives motor via reducer drives the helix transporting device composition; Worm conveyor connecting analog shield body slag notch; Simulation shield body is installed in above the shield body overturn platform; Overturning oil cylinder connects shield body overturn platform with the upset of control simulation shield body; The soil case places the slag notch below of worm conveyor on the shield body overturn platform; Described test platform adopts PC control.
Wherein, described simulation shield body is installed on the shield body overturn platform by bolt.
Wherein, described native case is fixedly connected with shield body overturn platform by bolt.
Wherein, described netted dividing plate is connected with simulation shield body by welding, and stirrer is bolted on and stirs on the driving bearing.
Wherein, described shield body overturn platform one end is connected with the melt pit bearing by bolt, and the other end is connected with overturning oil cylinder by the control overturning oil cylinder by bolt can make simulation shield body overturn in melt pit easily, is convenient to add dregs in simulation shield body.
Wherein, the driving adoption rate reversal valve of described hydraulic jack control.
Wherein, described hydraulic jack is equipped with diverting valve.
Wherein, the quantity of described hydraulic jack is six, and the simulation propelling cylinder is four and the distribution that assumes diamond in shape, and overturning oil cylinder is two parallel arranged.
Wherein, described simulation shield body and/or simulation Tu Cang are circular and/or square and/or rectangle.
The translational speed of propulsion system realizes that by PC control ratio reversal valve can simulate shield tunneling process according to friction speed, the rotating speed of worm conveyor can be regulated.
Described test platform can adopt electrohydraulic servo device and frequency conversion servo-electric motor as power source, the test ground selects the most representative loosening sand stratum and clay stratum for the loosening sand stratum, observe " soil plug " and form effect, observe the worm conveyor phenomenon of " gushing ", add different modifying agents, carry out sediment improvement, obtain the relation of additive component and sediment improvement performance; For clay stratum, observe the soil body and stir torque condition (simulation cutterhead moment of torsion), observe driving speed, add different modifying agents, observe dregs stream plasticity situation, obtain adding the relation of modifying agent composition and cutterhead moment of torsion, drivage efficiency.Can also by four kinds of state procedures (open type, half earth pressure balance pattern, earth pressure balance pattern, overvoltage boring mode) of this test platform simulation earth pressure balanced shield, EPBS driving, obtain driving speed and worm conveyor rotation speed relation curve in addition.For the soil improvement in the earth pressure balanced shield, EPBS construction provides theoretical foundation.
By described test platform, can be achieved as follows test:
1, tests for the loosening sand stratum: in the constant situation of dregs, propulsion plant thrust is certain, under the worm conveyor rotating speed permanence condition, observe " soil plug " and form effect, observe the worm conveyor phenomenon of " gushing ", add different modifying agents, carry out sediment improvement, obtain the relation of additive component and sediment improvement performance.
2, for clay stratum test, observe the soil body and stir torque condition (simulation cutterhead moment of torsion), observe driving speed, add different modifying agents, observe dregs stream plasticity situation, obtain adding the relation of modifying agent composition and cutterhead moment of torsion, drivage efficiency.
3, four kinds of state procedures (open type, half earth pressure balance pattern, earth pressure balance pattern, overvoltage boring mode) of this test unit simulation earth pressure balanced shield, EPBS driving obtain driving speed and worm conveyor rotation speed relation curve.
Description of drawings
Fig. 1 is structural representation of the present invention;
Wherein: 1 simulation propelling cylinder, 2 adds native hole, 3 overturning oil cylinders, 4 propelling pistons, 5 simulation shield bodies, 6 netted dividing plates, 7 access holes, 8 simulation Tu Cang, 9 stirrers, 10 stirring drive motor, 11 worm conveyors, 12 native casees, 13 bracing frames, 14 shield body overturn platforms, 15 melt pit bearings, 16 melt pits, 17 simulation shield body cover plates, 18 simulation shield body slag notches.
Embodiment
Elaborate below in conjunction with the embodiment of the invention: this example is implemented under the prerequisite with technical solution of the present invention, has provided detailed embodiment and process, but protection scope of the present invention is not limited to following example.
Embodiment 1:
A kind of test platform of earth pressure balanced shield, EPBS soil improvement research comprises the simulation propelling cylinder, adds native hole, overturning oil cylinder, propelling piston, simulation shield body, netted dividing plate, access hole, simulation Tu Cang, stirring apparatus, worm conveyor, native case, bracing frame, shield body overturn platform, melt pit bearing; Wherein, the simulation propelling cylinder connects the propulsion system that propelling piston consists of test platform by simulation shield body cover plate; Stirring apparatus forms by reductor connection stirrer by stirring drive motor; Worm conveyor is that the screw drives motor via reducer drives the helix transporting device composition; Worm conveyor connecting analog shield body slag notch; Simulation shield body is installed in above the shield body overturn platform; Overturning oil cylinder connects shield body overturn platform with the upset of control simulation shield body; The soil case places the slag notch below of worm conveyor on the shield body overturn platform; Described test platform adopts PC control.
Wherein, described simulation shield body is installed on the shield body overturn platform by bolt.
Wherein, described native case is fixedly connected with shield body overturn platform by bolt.
Wherein, described netted dividing plate is connected with simulation shield body by welding, and stirrer is bolted on and stirs on the driving bearing.
Wherein, described shield body overturn platform one end is connected with the melt pit bearing by bolt, and the other end is connected with overturning oil cylinder by bolt, by the control overturning oil cylinder simulation shield body is overturn easily in melt pit, is convenient to add dregs in simulation shield body.
Wherein, the driving adoption rate reversal valve of described hydraulic jack control.
Wherein, described hydraulic jack is equipped with diverting valve.
Wherein, the quantity of described hydraulic jack is six, and the simulation propelling cylinder is four and the distribution that assumes diamond in shape, and overturning oil cylinder is two parallel arranged.
Wherein, described simulation shield body and/or simulation Tu Cang are circular and/or square and/or rectangle.
The translational speed of propulsion system realizes that by PC control ratio reversal valve can simulate shield tunneling process according to friction speed, the rotating speed of worm conveyor can be regulated.
Netted dividing plate, rabbling mechanism, propelling piston all adopt high-strength steel sheet to be made, and guarantee intensity, rigidity and stability in the process of the test, satisfy the little requirement of deflection.
Implementation step:
Suppose to have following earth pressure balanced shield, EPBS construction requirement:
1, the stratum of earth pressure balanced shield, EPBS construction is loosening sand stratum or clay stratum;
2, add respectively the soil improvement agent such as foaming agent, polymkeric substance, discrete agent;
One, test is prepared
1, whether each coupling bolt of check test platform is loosening and whether each control system work is normal, if any unusually can suitably processing.Determine that general supply is in off-state.
2, operation overturning oil cylinder puts the upset of simulation shield body in place, gets loosening sand and puts into the shield body by filling native hole, and then sealing adds native hole.
3, operation overturning oil cylinder, but make simulation shield body Yan arrive again the level duty.
4, closed general supply determines that the hydraulic system surplus valve is in full-gear.Start host computer, hydraulic power unit, determine that each detection system is in normal operating conditions on the host computer.
5, at first start the simulation propelling cylinder, until dregs is squeezed into simulation Tu Cang and fills up the bottom by netted dividing plate after, when adding gas to setting value in the native storehouse of simulation, start that rabbling mechanism stirs and inject the soil improvement agent by filling orifice, restart worm conveyor and be unearthed.
Two, process of the test
1, tests for sandy soil
1) in the constant situation of dregs, propulsion plant thrust is certain, under the worm conveyor rotating speed permanence condition, observe " soil plug " and form effect, observes the worm conveyor phenomenon of " gushing ";
2) add different modifying agents, carry out sediment improvement; Obtain the relation of additive component and sediment improvement performance;
3) wait simulating after Tu Cang do not have earth, close successively stirring motor, helical feed motor, closing test platform power, finish for the loosening sand stratum and test.
If finish for the test of loosening sand stratum, do following experiment:
2, test for cohesive soil
1) observes the soil body and stir torque condition (simulation cutterhead moment of torsion), observe driving speed;
2) add different modifying agents, observe dregs stream plasticity situation, obtain adding the relation of modifying agent composition and cutterhead moment of torsion, drivage efficiency, thereby instruct soil improvement in the earth pressure balanced shield, EPBS work progress.
3) wait simulating after Tu Cang do not have earth, close successively stirring motor, helical feed motor, closing test platform power, finish for clay stratum and test.
If test is finished for the viscosity soil, do following experiment:
3, four kinds of state procedure tests of simulation earth pressure balanced shield, EPBS driving
1) for four kinds of state procedures of earth pressure balanced shield, EPBS driving as: open type, half earth pressure balance pattern, earth pressure balance pattern, overvoltage boring mode are simulated;
2) obtain driving speed and worm conveyor rotation speed relation curve by this test.
The enlightenment that obtains according to experiment:
1, can give the earth pressure balanced shield, EPBS operating personnel with theoretical direction, in tunneling process, rationally adjust driving speed and the worm conveyor rotating speed of earth pressure balanced shield, EPBS.
2, at the soil improvement for clay stratum and loosening sand stratum work progress, can give the earth pressure balanced shield, EPBS operating personnel with theoretical direction.
3, the gross data of earth pressure balanced shield, EPBS soil improvement is furtherd investigate carried out basic theories.
This example show this test platform can fine realization earth pressure balanced shield, EPBS work progress in the soil improvement test, for the earth pressure balanced shield, EPBS soil improvement provides theoretical foundation.
Claims (9)
1. the test platform of an earth pressure balanced shield, EPBS soil improvement research is characterized in that: comprise the simulation propelling cylinder, add native hole, overturning oil cylinder, propelling piston, simulation shield body, netted dividing plate, access hole, simulation Tu Cang, stirring apparatus, worm conveyor, native case, bracing frame, shield body overturn platform, melt pit bearing; Wherein, the simulation propelling cylinder connects the propulsion system that propelling piston consists of test platform by simulation shield body cover plate; Stirring apparatus forms by reductor connection stirrer by stirring drive motor; Worm conveyor is that the screw drives motor via reducer drives the helix transporting device composition; Worm conveyor connecting analog shield body slag notch; Simulation shield body is installed in above the shield body overturn platform; Overturning oil cylinder connects shield body overturn platform with the upset of control simulation shield body; The soil case places the slag notch below of worm conveyor on the shield body overturn platform; Described test platform adopts PC control.
2. test platform according to claim 1, it is characterized in that: described simulation shield body is installed on the shield body overturn platform by bolt.
3. test platform according to claim 1, it is characterized in that: described native case is fixedly connected with shield body overturn platform by bolt.
4. test platform according to claim 1 is characterized in that: described netted dividing plate by welding with simulate the shield body and be connected, stirrer is bolted on the stirrer-driven bearing.
5. test platform according to claim 1, it is characterized in that: described shield body overturn platform one end is connected with the melt pit bearing by bolt, the other end is connected with overturning oil cylinder by bolt, by the control overturning oil cylinder simulation shield body is overturn easily in melt pit, be convenient in simulation shield body, add dregs.
6. test platform according to claim 1 is characterized in that: the driving adoption rate reversal valve control of described hydraulic jack.
7. test platform according to claim 1, it is characterized in that: described hydraulic jack is equipped with diverting valve.
8. test platform according to claim 1, it is characterized in that: the quantity of described hydraulic jack is six, and the simulation propelling cylinder is four and the distribution that assumes diamond in shape, and overturning oil cylinder is two parallel arranged.
9. according to claim 1 to 8 arbitrary described test platforms, it is characterized in that: described simulation shield body and/or simulation Tu Cang are for circular and/or square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011103657755A CN103115787A (en) | 2011-11-17 | 2011-11-17 | Testing platform used for soil modification research of earth pressure balance shield |
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| CN2011103657755A CN103115787A (en) | 2011-11-17 | 2011-11-17 | Testing platform used for soil modification research of earth pressure balance shield |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832167A (en) * | 2015-05-08 | 2015-08-12 | 上海城建市政工程（集团）有限公司 | Test method for stratum adaptability of shield |
| CN108426988A (en) * | 2018-05-11 | 2018-08-21 | 洛阳理工学院 | A kind of novel earth pressure balanced sediment improvement testing stand |
| CN108508159A (en) * | 2018-05-11 | 2018-09-07 | 洛阳理工学院 | A kind of novel stirring external sediment improvement testing stand |
| CN108731956A (en) * | 2017-04-25 | 2018-11-02 | 同济大学 | A kind of earth pressure balanced shield, EPBS sediment improvement simulation test device and test method |
| CN110186625A (en) * | 2019-06-21 | 2019-08-30 | 中铁工程服务有限公司 | Center steering body medium channel sealing property detection device |
| CN114858657A (en) * | 2022-07-08 | 2022-08-05 | 广州地铁设计研究院股份有限公司 | Testing device and testing method for evaluating improvement effect of muck |
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| JP2004044254A (en) * | 2002-07-12 | 2004-02-12 | Okumura Corp | Large stone crushing device for tunnel excavator |
| CN1619280A (en) * | 2004-12-09 | 2005-05-25 | 上海隧道工程股份有限公司 | Large shield tunnelling analogue test platform |
| CN201307365Y (en) * | 2008-10-20 | 2009-09-09 | 中国矿业大学(北京) | Simulating shield machine for tunnel boring test |
| CN201903985U (en) * | 2010-11-19 | 2011-07-20 | 上海市机械施工有限公司 | Subway tunnel shield trainer |
| CN102226729A (en) * | 2011-06-02 | 2011-10-26 | 广厦建设集团有限责任公司 | Earth pressure balance (EPB) shield residual soil pressure control model test apparatus |
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- 2011-11-17 CN CN2011103657755A patent/CN103115787A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004044254A (en) * | 2002-07-12 | 2004-02-12 | Okumura Corp | Large stone crushing device for tunnel excavator |
| CN1619280A (en) * | 2004-12-09 | 2005-05-25 | 上海隧道工程股份有限公司 | Large shield tunnelling analogue test platform |
| CN201307365Y (en) * | 2008-10-20 | 2009-09-09 | 中国矿业大学(北京) | Simulating shield machine for tunnel boring test |
| CN201903985U (en) * | 2010-11-19 | 2011-07-20 | 上海市机械施工有限公司 | Subway tunnel shield trainer |
| CN102226729A (en) * | 2011-06-02 | 2011-10-26 | 广厦建设集团有限责任公司 | Earth pressure balance (EPB) shield residual soil pressure control model test apparatus |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832167A (en) * | 2015-05-08 | 2015-08-12 | 上海城建市政工程（集团）有限公司 | Test method for stratum adaptability of shield |
| CN108731956A (en) * | 2017-04-25 | 2018-11-02 | 同济大学 | A kind of earth pressure balanced shield, EPBS sediment improvement simulation test device and test method |
| CN108426988A (en) * | 2018-05-11 | 2018-08-21 | 洛阳理工学院 | A kind of novel earth pressure balanced sediment improvement testing stand |
| CN108508159A (en) * | 2018-05-11 | 2018-09-07 | 洛阳理工学院 | A kind of novel stirring external sediment improvement testing stand |
| CN110186625A (en) * | 2019-06-21 | 2019-08-30 | 中铁工程服务有限公司 | Center steering body medium channel sealing property detection device |
| CN114858657A (en) * | 2022-07-08 | 2022-08-05 | 广州地铁设计研究院股份有限公司 | Testing device and testing method for evaluating improvement effect of muck |
| CN114858657B (en) * | 2022-07-08 | 2022-10-14 | 广州地铁设计研究院股份有限公司 | Test method for evaluating improvement effect of muck |
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Application publication date: 20130522 |