CN1619280A - Large shield tunnelling analogue test platform - Google Patents
Large shield tunnelling analogue test platform Download PDFInfo
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- CN1619280A CN1619280A CN 200410089260 CN200410089260A CN1619280A CN 1619280 A CN1619280 A CN 1619280A CN 200410089260 CN200410089260 CN 200410089260 CN 200410089260 A CN200410089260 A CN 200410089260A CN 1619280 A CN1619280 A CN 1619280A
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Abstract
The present invention relates to a large shield driving simulation test platform. Its simulation shield driving machine adopts phi 1800 mm. Said shield driving simulation test platform also includes the components of drawbar, soil box, rear back, main top device, several bags set in the soil box, soil pressure sensors and pore pressure sensors which are set in the soil box and connected with monitoring system, hydraulic system, control system and sealing device, etc.
Description
Technical field
What the present invention relates to is a kind of Tunnel Engineering technical field simulation test device that is used for, particularly a kind of large shield tunnelling analogue test platform.
Background technology
For satisfying the needs that the different regions subway tunnels builds and the needs in Jiang Yuehai tunnel etc. more, carry out rational shield structure type selecting according to concrete project geologic condition, all need to carry out the shield driving compatibility test research of Different Strata.
Find through literature search prior art, Japan patent of invention JP8029297, name is called: a kind of shield driving centrifugal model test device and test method, this technology is carried out the mechanical similitude principle by adopting material object, can simulate and confirm to act on load on the section of jurisdiction, and shield structure propulsion model test method is provided.After the test soil case of the model soil body is housed in one of placement on the centrifugal force device, utilizes the centrifugal force charger that material object is carried out after model scale 1/n times model being put into n centrifugal acceleration field doubly and carry out model test.By centrifugal model test device analogy model shield structure progradation, the load that acts on duct pieces of shield tunnel is measured and is confirmed the force-bearing situation in tunnel in the mode of model test.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of large shield tunnelling analogue test platform is provided.Make it can simulate the tunneling process of different shield structures in Different Strata, thereby improve design, the manufacture level of development machine, enlarge state's productive rate of China's development machine.
The present invention is achieved by the following technical solutions, the present invention includes: native case, the simulation shield excavation machine, pull bar, main jacking device, after lean on, the capsule bag, base, loading system, monitoring system, control system, hydraulic system, the simulation shield excavation machine adopts φ 1800mm, pull bar is with native case and back by coupling together, base is the basis of main jacking device, in the soil case some capsule bags are set, the capsule bag couples together by pipeline and loading system, fill typical soil layer in the soil case, also be provided with several soil pressure sensors in the soil case, pore water pressure sensor, these sensors link to each other with monitoring system; Main jacking device is placed on the base, and hydraulic system, control system link to each other with main jacking device; The simulation shield excavation machine is placed on the main jacking device, simulates shield machine simultaneously and gets the head cutterhead and be installed in the end inlet of native case by packoff.
The internal diameter of described native case is 4.0m, effectively internal diameter 3.8m, the interior axial length of cylinder are not less than 6.0m, two circular opens that diameter is 1.5m are left in native case top, and in addition, native case is a hermetically-sealed construction.
Described simulation shield excavation machine cutterhead rotating speed: 0～5rpm, fltting speed: 60mm/min.
Described main jacking device provides power, main jacking device move speed: 60mm/min for the simulation shield excavation machine.
Several capsule bags are set in the described native case, capsule bag water-filling are pressurizeed by the loading system water.
The effect of described loading system is to simulate shield excavation machine in underground construction operating mode by the soil body in the native case being applied certain pressure, and maximum load pressure is 0.5Mpa.
The present invention can simulate the shield driving overall process, comprises knife cutting and shield structure progradation, casting process, shield endnote slurry etc.; Compare with background patents, can not simulate the overall process of shield driving by each test, the each test of background patents can only be simulated simple function; The present invention adopts loading system and some capsule bags to combine and can realize multiple typical stratum and mix the simulation on stratum in native case; For example, by can changing soil nature in the native case by capsule bag pressurization in the native case, thereby realize the simulation of the stress of the simulation of the different thickness of earth covering in tunnel and different soil; The present invention's soil case length can make up according to the test needs, can satisfy the simulation of Different Strata (mixing stratum) and the needs of different Excavation Lengths; This is background patents and domestic and international other similar device or the unexistent function of test platform, and in fact the Excavation Length in the test unit that relates in the background patents is limited; The present invention soil case is multi-functional, except satisfying shield tunnelling analogue test, also can freeze, worm conveyor is unearthed and multiple test such as slip casting.This also is background patents and domestic and international other similar device or the unexistent function of test platform; Monitoring system of the present invention can write down Various types of data and the real-time correlation curve that shows in the process of the test automatically; Because test unit is larger, the restriction of the quantity of layout various kinds of sensors is little in typical soil layer and in the simulation shield excavation machine, thereby data in the acquisition test process more, and the test unit scale of background patents design is less, can only arrange limited sensor, the data volume of gathering in the test is restricted, is not easy to do comprehensive, detail analysis.
Description of drawings
Fig. 1 is the analogue test platform synoptic diagram
Wherein: native case 1, simulation shield excavation machine 2, pull bar 3, main jacking device 4, the back leans on 5, capsule bag 6, base 7.
The floor plan synoptic diagram of Fig. 2 shield tunnelling analogue test platform
Wherein: loading system 8, monitoring system 9, control system 10, hydraulic system 11.Dotted line adds arrow and represents control and controlled relation among the figure.
Embodiment
As shown in Figure 1 and Figure 2, the present invention includes: native case 1, simulation shield excavation machine 2, pull bar 3, main jacking device 4, back by 5, capsule bag 6, base 7, also have hydraulic system 11, monitoring system 9, loading system 8, control system 10.Simulation shield excavation machine 2 adopts φ 1800mm, pull bar 3 couples together native case 1 and back by 5, base 7 is bases of main jacking device 4, in the soil case 1 some capsule bags 6 are set, capsule bag 6 couples together by pipeline and loading system 8, fill typical soil layer in the soil case 1, also be provided with several soil pressure sensors, pore water pressure sensor in the native case 1, these sensors link to each other with monitoring system 9; Main jacking device 4 is placed on the base 7, and hydraulic system 11, control system 10 link to each other with main jacking device 4; Simulation shield excavation machine 2 is placed on the main jacking device 4, simulates shield machine simultaneously and gets the head cutterhead and be installed in the end inlet of native case 1 by packoff.
The internal diameter of described native case 1 is 4.0m, effectively internal diameter 3.8m, the interior axial length of cylinder leave two circular opens that diameter is 1.5m more than or equal to 6.0m, native case 1 top, in addition, soil case 1 is a hermetically-sealed construction, water-tight in the use, air tight, also can bear and keep maximum internal pressure 0.4MPa.Utilize this soil case 1 to carry out the simulation of original state cohesive soil, original state sandy soil, original state gravel soil.
Be embedded with soil pressure meter, displacement meter, hole pressure meter etc. on the soil case, the soil pressure that can be convenient for measuring the soil body in the simulation shield driving process changes, pore water pressure changes and the distortion of the soil body.
The characteristics that described simulation shield excavation machine 2 has is earth pressure balanced, slurry-water balance type exchanges and cutterhead exchanges, its Specifeca tion speeification is as follows: gross thrust: 3000kN, main top oil cylinder 500kN/, stroke 1500mm, totally 6, screw machine diameter: φ 300mm, the amount of being unearthed: 9.16m3/h, moment of torsion: 117kNm, cutterhead rotating speed: 0～5rpm, fltting speed: 60mm/min, cutterhead aperture opening ratio: 30% (panel type), 75% (spoke type).
Described main jacking device 4 provides power for the simulation shield excavation machine, the Specifeca tion speeification of main jacking device 4 is as follows: oil cylinder model: 160/200-1500, specified top power: 3000kN, maximum top power: 3750kN, rated oil pressure: 24Mpa, maximum oil pressure: 30Mpa, move speed: 60mm/min, working flow: 50L/min.
Described capsule bag 6 is equipped with 36 in the whole native case 1 altogether, and to the pressurization of capsule bag 6 water-fillings, pressure passes to the soil body by loading system 8 waters, thereby by the simulation of hierarchical loading realization to different stress in the soil body.
The effect of described loading system 8 is to simulate shield excavation machine 2 in underground construction operating mode by the soil body in the native case 1 being applied certain pressure.Its concrete form is for realizing the loading to native case 1 soil body by the water of giving injection certain pressure in the many groups rubber bag tank bag 6 in the soil box for analogue 1.Wherein, be divided into 5 groups by 6 applied pressures of rubber bag tank bag, and will realize the loading of multiple different pressures, maximum load pressure is 0.5Mpa.
With earth pressure balanced shield, EPBS driving simulation test in the typical stratum is example, and mechanical property of its water cut, particulate component, density, soil or the like as the soft clay stratum, should be considered in the typical stratum that driving is intended in simulation in the native case 1 of test platform earlier; The stress state of utilizing loading system 8 in the test platform (designing suitable pressuring method) and capsule bag 6 to change in the soil body also can be simulated different overburden layer thickness by loading system 8 suitable pressurizations; Bury some sensors as required in advance underground in the soil layer of soil case 1, be used for measuring soil pressure and pore water pressure and soil layer displacement or the like of soil layer; φ 1800mm simulation shield excavation machine 2 is connected (noting using rubber " ankle socks " to guarantee the sealing of porch) with the porch of native case 1.
Set soil pressure value, shield machine rotating speed and fltting speed, provide suitable dynamic to carry out jacking driving by main jacking device 4 by hydraulic system 11, the rotating speed of adjusting worm conveyor in the simulation shield excavation machines 2 by control system 10 in the tunneling process is controlled the earth pressure balance in the native case; Use hydraulic system 11 control shield cutter rotating speed and fltting speeds in the process of the test, the driving simulation test of cutterhead that can be by the different openings rate in the process of the test, use monitoring system 9 to measure cutterhead moment of torsion, rotating speed, fltting speed, propelling top power etc., the ground adaptability of the relation of research shield machine running parameter and surface deformable and research shield structure.
Claims (6)
1, a kind of large shield tunnelling analogue test platform, comprise: native case (1), simulation shield excavation machine (2), loading system (8), it is characterized in that, also comprise: pull bar (3), main jacking device (4), the back is by (5), capsule bag (6), base (7), monitoring system (9), control system (10), hydraulic system (11), simulation shield excavation machine (2) adopts cutter diameter: φ 1800mm, pull bar (3) couples together native case (1) and back by (5), base (7) is the basis of main jacking device (4), in the soil case (1) capsule bag (6) is set, capsule bag (6) couples together by pipeline and loading system (8), in the soil case (1) soil pressure sensor is set also, pore water pressure sensor, these sensors link to each other with monitoring system (9), main jacking device (4) is arranged on the base (7), hydraulic system (11), control system (10) links to each other with main jacking device (4), simulation shield excavation machine (2) is arranged on the main jacking device (4), simulates shield excavation machine (2) head cutterhead simultaneously and is arranged in the end inlet of native case (1) by packoff.
2, large shield tunnelling analogue test platform according to claim 1 is characterized in that, the internal diameter of described native case (1) is 4.0m, effective internal diameter 3.8m, and axial length is more than or equal to 6.0m in the cylinder.
According to claim 1 or 2 described large shield tunnelling analogue test platforms, it is characterized in that 3, two circular opens that diameter is 1.5m are left in described native case (1) top, native case (1) is a hermetically-sealed construction.
4, according to claim 1 or 2 described large shield tunnelling analogue test platforms, it is characterized in that, several capsule bags (6) are set in the described native case (1), capsule bag (6) water-filling is pressurizeed by loading system (8) water.
5, large shield tunnelling analogue test platform according to claim 1 is characterized in that, described simulation shield excavation machine (2) cutterhead rotating speed: 0-5rpm, fltting speed: 60mm/min.
6, large shield tunnelling analogue test platform according to claim 1 is characterized in that, described main jacking device (4) move speed: 60mm/min, working flow: 50L/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100892607A CN100343650C (en) | 2004-12-09 | 2004-12-09 | Large shield tunnelling analogue test platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100892607A CN100343650C (en) | 2004-12-09 | 2004-12-09 | Large shield tunnelling analogue test platform |
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| CN1619280A true CN1619280A (en) | 2005-05-25 |
| CN100343650C CN100343650C (en) | 2007-10-17 |
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| CNB2004100892607A Expired - Fee Related CN100343650C (en) | 2004-12-09 | 2004-12-09 | Large shield tunnelling analogue test platform |
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