CN101775989A - Comprehensive simulation test platform of large sunk shield entry-driving machine - Google Patents
Comprehensive simulation test platform of large sunk shield entry-driving machine Download PDFInfo
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- CN101775989A CN101775989A CN201010106434A CN201010106434A CN101775989A CN 101775989 A CN101775989 A CN 101775989A CN 201010106434 A CN201010106434 A CN 201010106434A CN 201010106434 A CN201010106434 A CN 201010106434A CN 101775989 A CN101775989 A CN 101775989A
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Abstract
The invention discloses a comprehensive simulation test platform of a large sunk shield entry-driving machine, which comprises a simulated shield entry-driving machine, a soil box, a main support device, a loading system, a monitoring system, a control system and a hydraulic system, wherein the soil box is of a sunk box-shaped structure under the ground, the inner part of the soil box is provided with a starting area, a loading area and a receiving area, the walls among the areas are provided with tunnel portals, the length, the width and the height of the soil box are respectively of 24 m, 7 m and 8.5 m, and the length, the width and the height of the loading area are respectively of 10 m, 7 m and 6.7 m; and the loading system comprises lateral loading systems arranged on the walls at the left side and the right side of the loading area of the soil box and a mobile loading system arranged at the upper part of the loading area of the soil box, the lateral loading systems and the mobile loading system are all provided with multiple loading barrels, the loading barrels are driven by the hydraulic system to extrude soil in the soil box, and the mobile loading system can fluctuate by itself and move at the upper part of the loading area of the soil box. The invention can simulate the stressed state of the soil at different depths of various strata, neglect the border effect in the simulated shield driving process, simulate the overall shield driving process in one test, and reduce the influence of the loading system damage on the test.
Description
Technical field:
The present invention relates to be used for the simulation test device of construction of tunnel, what be specifically related to is a kind of comprehensive simulation test platform of large sunk shield entry-driving machine, belongs to the construction of tunnel technical field.
Background technology:
In order to satisfy the subway or the needs of Jiang Yuehai tunnel construction construction more under different regions, the different geological conditions, it is necessary according to the concrete working condition of engineering shield excavation machine being carried out rational type selecting.Shield structure type selecting has the whole bag of tricks, as theory analysis etc., and studies the characteristic of shield excavation machine when the underground construction tunnel by the method for simulated test, is a kind of science, effective method thereby select rational shield excavation machine pattern.Some enterprises, scientific research institution all set up relevant laboratory with university and carry out this specific engineering test with the corresponding simulator stand of design-build both at home and abroad, have just developed large shield tunnelling analogue test platform to carry out the shield-tunneling construction test as Shanghai Tunnel Engineering stock Co., Ltd.The simulated test of shield-tunneling construction is exactly to apply certain pressure by certain mode to the soil body around the simulation shield excavation machine in the simulator stand, make the test soil body fully simulate actual soil layer in the shield excavation machine work progress, thereby the research shield excavation machine is at different geological conditionss, characteristic, the characteristic of shield excavation machine and the interaction relationship between the machine soil of soil body when different construction depth is constructed, thereby provides foundation for the shield excavation machine type selecting.
Chinese patent ZL200410089260.7 discloses a kind of large shield tunnelling analogue test platform and Chinese patent ZL200410089262.6 discloses a kind of soil box for analogue of simulating shiold tunnelling machine testing.The described analogue test platform of this patent adopts the cylindrical enclosure soil case of horizontal positioned, the simulation soil body of wherein packing into, this soil body arranged outside has capsule bag loading system, by water pump clear water is transported in the capsule bag so that the simulation soil body is loaded through pressure regulation circuit, and is provided with pressure sensor in the soil body soil pressure that is produced is detected.Above-mentioned pressure regulation circuit is divided into five, and every loop is disposed with reducing valve, flap valve and butterfly valve, and the capsule bag that single Zhi Huilu was communicated with is arranged on the same circular cross section of native case, and every loop is manual adjustments pressure separately.Simulated test is exactly the soil body to be applied the pressure that distributes according to certain rules by capsule bag loading system, simulate the situation of shield excavation machine in underground different depth construction, this capsule bag loading system on-load pressure is 0.4MPa to the maximum, and its maximum analog soil depth is 22m.
Above-mentioned existing shield tunnelling analogue test platform has following deficiency:
1, each test can not be simulated the complete procedure of shield driving---and the soil box for analogue structure is too simple, can't simulate the shield structure from appearing, tunnel the into complete construction overall process in hole by single test.
2, test can not be ignored boundary effect, influence result's accuracy---at the shield structure normally under the driving state, soil body characteristic within the certain bounds of its periphery can be made normal response to the disturbance of shield structure, when disturbing factor occurring in this bounds, then the response of soil body characteristic can take place unusually, and this phenomenon is referred to as " boundary effect ".The cylindrical native box structure and the size of test platform is less in the background patents, has only
Thereby within the bounds of the as easy as rolling off a log soil body characteristic response that falls into simulation shield structure of its tank wall, thereby making soil body characteristic response be different from the shield structure normally tunnels state and occurs unusual, the data that record of test also produce error simultaneously, cause the analog reslt distortion and can't reflect the truth of shield excavation machine at underground construction.
3, capsule bag loading system has certain difference to the simulation and the actual conditions of soil pressure---the arranged around of the capsule bag edge simulation shield structure in cylindrical native case in the background patents in the capsule bag loading system, its arrangement can not simulate the pressure of different soil up and down, this capsule bag loading system only comprises five loops in addition, five different pressures can only be set and need manual adjustments, in addition, capsule bag loading system can only produce the soil pressure of 0.4Mpa, thus its simulation soil depth is more shallow has only 22m.In a word, original capsule bag loading system is inadequate to the simulation of soil layer, with actual conditions suitable gap is arranged.
4, load that damage takes place the capsule bag easily and the influence test---the capsule bag in the capsule bag loading system is a flexible member, very easily be damaged in the process of filling the soil body in native case, especially the position that is connected with the water route fractures easily, thereby causes the interruption tested.
Summary of the invention:
Technical problem to be solved by this invention is, overcome the defective of existing large shield tunnelling analogue test platform, a kind of novel comprehensive simulation test platform of large sunk shield entry-driving machine is provided, it can realize the simulation to polytype stratum different depth earth stress state, fully ignore simulation shield driving procedure boundary effect, reach and in single test, simulate, reduce the influence of loading system damage test from the effect of the shield driving construction overall process in the hole of appearing to.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of comprehensive simulation test platform of large sunk shield entry-driving machine, comprise the simulation shield excavation machine, the soil case, main jacking device, loading system, monitoring system, control system and hydraulic system, it is characterized in that: described native case is the sunk type box structure, be placed on below ground, be provided with the district that starts according to its inside of sequence of positions, loading zone and reception area, between district and the loading zone and on the body of wall between loading zone and the reception area portal is set respectively starting, described native case is of a size of 24 * 7 * 8.5m, and wherein loading zone is of a size of long 10m, wide 7m, dark 6.7m; Described simulation shield excavation machine and main jacking device are arranged in the district that starts of native case, and this main jacking device is positioned at the rear of simulation shield excavation machine and provides onward impulse for simulating shield excavation machine; Described loading system is made up of side direction loading system and portable loading system, this side direction loading system is arranged on the body of wall of the native case loading zone left and right sides, this movable type loading system is arranged at the top of native case loading zone, described side direction loading system and portable loading system all are provided with a plurality of loading post buckets, these a plurality of loading post buckets push the soil body in the native case by the driving of hydraulic system, the lifting and move on the top of native case loading zone voluntarily of described portable loading system.
Comprehensive simulation test platform of large sunk shield entry-driving machine of the present invention also includes the spline withdrawing device, this spline withdrawing device can prevent to simulate development machine generation rotation and realize pulling back to the simulation shield excavation machine, it comprises the spline cushion block and the oil cylinder of pulling back, this spline cushion block is fixed on the rear portion of described simulation shield excavation machine and has the standstill face, this standstill face contact also slides on the guide rail of described native case bottom, the described oil cylinder of pulling back is connected between the body of wall of simulation shield excavation machine and native case, and it is subjected to the driving pulling simulation shield excavation machine of hydraulic system; Described portable loading system is provided with the hydraulic lifting post that some lower ends have roller, this hydraulic lifting post is subjected to the driving of hydraulic system lifting to play portable loading system, and described roller can roll on the top of native case loading zone and move to drive whole portable loading system; Described simulation shield excavation machine can be realized the conversion of soil pressure shield structure and slurry shield and the conversion that realizes multiple cutterhead; Described portal can be realized the portal conversion of multiple shape; Described a plurality of loading post bucket can be regulated the soil pressure of pressure size with simulation Different Strata and different depth respectively; Described monitoring system comprises some sensors, and these some sensors are placed in the interior soil body of native case, simulate on the shield excavation machine and on the loading system.
Compare with existing large shield tunnelling analogue test platform, the present invention has obtained following useful
Technique effect:
1, because native case is provided with the district that starts, loading zone and reception area, between each zone, be provided with portal, thereby the present invention can simulate the shield structure from the driving of appearing by single test, to the whole tunneling process that enters the hole, comprise shield structure turnover hole process, shield structure progradation, knife cutting process and casting process etc. again.
2, loading system of the present invention the simulation shield excavation machine above and both sides be provided with a plurality of loading post buckets that can regulate the pressure size respectively, thereby can realize simulation to the earth stress state of different soil, different thickness of earth-fill covers and mix the simulation on stratum and is realized in multiple typical stratum, and improved degree true to nature to the stratum simulation by the present invention of regulator solution pressing system; In addition, because the load capability of fluid pressure type loading system is much higher than capsule bag loading system, so the present invention has also enlarged the scope of soil body simulation, the darkest 60m that reaches of the degree of depth of its simulation soil layer.
3, the size of sunk type soil case loading zone of the present invention is enough big, reach 10 * 7 * 6m, the scope that therefore can comprise the soil body characteristic response of simulating shield excavation machine fully, in other words, the structure of the present invention's soil case can not constitute disturbing factor fully to the normal response of soil body characteristic, thereby can fully ignore the tunneling process boundary effect of simulating shield excavation machine, so just guarantee the accuracy of analog reslt.
4, loading system of the present invention is the hydraulic system of rigidity, and therefore its possibility that is damaged has avoided loading system to lose efficacy to the influence of test well below the capsule bag loading system of flexibility.
5, the present invention is provided with the spline withdrawing device, rotation takes place in the time of can preventing to simulate the cutting of development machine driving, can realize under certain special operation condition simultaneously that pulling back of shield excavation machine of simulation retreats, this is with regard to for local repeated test and simulate the test that retreats that meets accident of true shield machine and created condition in driving, that is to say, the present invention has increased the function of described comprehensive simulation test platform of large sunk shield entry-driving machine, has expanded the scope of application of analogue test platform.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
The specific embodiment:
The invention will be further described below in conjunction with specific embodiments and the drawings.
See also Fig. 1 structural representation of the present invention, the diagram comprehensive simulation test platform of large sunk shield entry-driving machine comprises simulation shield excavation machine 1, native case 2, spline withdrawing device 4, main jacking device 5, loading system, monitoring system, control system and hydraulic system.
Described native case 2 is for being used to put the foundation structure of the test soil body, it is the sunk type box structure, be placed on below ground, the main body of this soil case 2 is a concrete structure, it is of a size of long 24m, wide 7m, dark 8.5m, should be provided with start district A, loading zone B and three cavitys of reception area C from back to front in soil case 2 inside according to sequence of positions, in order to starting well, tunnel and three zones of received well of simulating process in the true shield machine tunneling process respectively.The start bottom of district A of this soil case 2 is equipped with guide rail, in order to place simulation shield excavation machine 1.Test the soil body in order to filling in this loading zone B, it is of a size of long 10m, wide 7m, dark 6.7m, big like this space is enough to comprise the scope of the soil body characteristic response of simulating shield excavation machine 1, that is to say, the tank wall of soil case 2 is certain to drop on outside the range boundary of above-mentioned soil body characteristic response, normal response to soil body characteristic can not constitute disturbing factor fully, thereby make the simulated test of doing by the present invention can fully ignore the tunneling process boundary effect of simulating shield excavation machine 1, therefore guaranteed the accuracy of analog reslt.The body of wall between district A and the loading zone B of starting is provided with one and goes out portal 3a, and in order to simulate appearing of true shield machine, the body of wall between loading zone B and the reception area C is provided with one and advances portal 3b, in order to simulate the hole of advancing of true shield machine.Described portal 3a and 3b can realize the portal conversion of multiple shape, to simulate the turnover hole process of multiple cross section shield structure under the various different operating modes.
Described simulation shield excavation machine 1 is arranged at when test is initial among the district A that starts of native case 2, and it adopts the shield machine of diameter 1800mm in the present embodiment.This simulation shield excavation machine 1 can be realized the conversion of soil pressure shield structure and slurry shield, can also realize the conversion of multiple cutterheads such as weak soil cutterhead, compound cutterhead.
Described main jacking device 5 is positioned at the rear of simulation shield excavation machine 1, and it adopts six hydraulic cylinders to advance jointly, for simulation shield excavation machine 1 provides onward impulse.
Described spline withdrawing device 4 can prevent to simulate shield excavation machine and when the cutting soil body rotation take place, and can also realize pulling back to simulation shield excavation machine 1 simultaneously.This spline withdrawing device 4 is arranged at the start rear portion of simulation shield excavation machine 1 among the district A of native case 2, and it comprises spline cushion block 41 and the oil cylinder 42 of pulling back.Described spline cushion block 42 is a frame-type component, its underpart has the standstill face, the rear portion that this spline cushion block 42 is fixed on described simulation shield excavation machine 1 fuses with it, this standstill face contacts with the guide rail of described native case 2 bottoms, and can on guide rail, slide, thereby make simulation shield excavation machine 1 be subjected to the restriction of guide rail and rotation can not take place.Described oil cylinder 42 1 ends of pulling back are connected on the simulation shield excavation machine 1, and the other end is connected with the body of wall at native case 2 rear portions, when the oil cylinder 42 of pulling back is subjected to the driving of hydraulic system, retreat with regard to stretchy simulation shield excavation machine 1.This shield structure pull back function can be implemented in certain operating mode next time drawing-die intend shield excavation machine 1, thereby for local repeated test and simulate in driving, the meet accident test of the situation that retreats of true shield machine and created condition, therefore the function of comprehensive simulation test platform of large sunk shield entry-driving machine of the present invention is increased, and the scope of application of analogue test platform is also expanded.
Described loading system is used for the test soil bodys in the native case 2 are pushed simulates soil pressure, and it is made up of side direction loading system 6 and portable loading system 7.Described side direction loading system 6 is arranged on the body of wall of the native case 2 loading zone B left and right sides, described portable loading system 7 is arranged at the top of native case 2 loading zone B, this side direction loading system 6 and portable loading system 7 all are provided with a plurality of loading post buckets 8, these a plurality of loading post buckets 8 are communicated with described hydraulic system, and the driving by hydraulic system is pushed the soil body in the native case 2, described a plurality of loading post bucket 8 can be regulated the soil pressure of pressure size with simulation Different Strata and different depth respectively, thereby realize to the simulation on multiple typical stratum and mixing stratum and to different soil, the simulation of the earth stress state of different thickness of earth-fill covers makes simulated test improve vivid effect to actual soil layer greatly.In the present embodiment, side direction loading system 6 every sides are provided with 24 loading post buckets 8, and both sides are provided with 48 loading post buckets 8 altogether; Portable loading system 7 is provided with 70 loading post buckets 8 altogether.In addition, because the load capability of fluid pressure type loading system is much higher than capsule bag loading system, in the present embodiment, the loaded soil pressure of loading system can reach 0.6MPa, therefore the present invention has realized the simulation of the soil layer of the dark 60m of reaching, thereby has enlarged the scope of soil body simulation of the present invention.Described portable loading system 7 is a frame type member, its periphery is provided with the hydraulic lifting post 71 that some lower ends have roller, be provided with the oil cylinder that links to each other with hydraulic system that can stretch up and down in this hydraulic lifting post 71, this oil cylinder is subjected to the driving of hydraulic system lifting to play whole portable loading system 7, at this moment the roller of hydraulic lifting post 71 lower ends just can roll on the top of native case 2 loading zone B, moves thereby drive whole portable loading system 7.The lifting and move on the top of native case 2 loading zone B voluntarily of described portable loading system 7, this mainly is conveniently to move portable loading system 7 and think that the filling test soil body creates conditions in loading zone B.
Described monitoring system includes some various kinds of sensors, as soil pressure sensor, pore water pressure sensor etc., these pressure sensors are placed in the soil body in the native case 2, on the simulation shield excavation machine 1 and on the loading system, constitute monitoring system jointly and realize whole analogue test platform is monitored.
Described control system realizes simulating the control of shield excavation machine 1, side direction loading system 6 and portable loading system 7 by electrical control.
Described hydraulic system is mainly simulation shield excavation machine 1, side direction loading system 6 and portable loading system 7 hydraulic power is provided.
Claims (7)
1. comprehensive simulation test platform of large sunk shield entry-driving machine, comprise the simulation shield excavation machine, the soil case, main jacking device, loading system, monitoring system, control system and hydraulic system, it is characterized in that: described native case is the sunk type box structure, be placed on below ground, be provided with the district that starts according to its inside of sequence of positions, loading zone and reception area, between district and the loading zone and on the body of wall between loading zone and the reception area portal is set respectively starting, described native case is of a size of 24 * 7 * 8.5m, and wherein loading zone is of a size of long 10m, wide 7m, dark 6.7m; Described simulation shield excavation machine and main jacking device are arranged in the district that starts of native case, and this main jacking device is positioned at the rear of simulation shield excavation machine and provides onward impulse for simulating shield excavation machine; Described loading system is made up of side direction loading system and portable loading system, this side direction loading system is arranged on the body of wall of the native case loading zone left and right sides, this movable type loading system is arranged at the top of native case loading zone, described side direction loading system and portable loading system all are provided with a plurality of loading post buckets, these a plurality of loading post buckets push the soil body in the native case by the driving of hydraulic system, the lifting and move on the top of native case loading zone voluntarily of described portable loading system.
2. comprehensive simulation test platform of large sunk shield entry-driving machine as claimed in claim 1, it is characterized in that: described portable loading system is provided with the hydraulic lifting post that some lower ends have roller, this hydraulic lifting post is subjected to the driving of hydraulic system lifting to play portable loading system, and described roller can roll on the top of native case loading zone and move to drive whole portable loading system.
3. comprehensive simulation test platform of large sunk shield entry-driving machine as claimed in claim 1, it is characterized in that: described analogue test platform also includes the spline withdrawing device, this spline withdrawing device can prevent to simulate shield excavation machine generation rotation and realize pulling back to the simulation shield excavation machine, it comprises the spline cushion block and the oil cylinder of pulling back, this spline cushion block is fixed on the rear portion of described simulation shield excavation machine and has the standstill face, this standstill face contact also slides on the guide rail of described native case bottom, the described oil cylinder of pulling back is connected between the body of wall of simulation shield excavation machine and native case, and it is subjected to the driving pulling simulation shield excavation machine of hydraulic system.
4. as claim 1,2 or 3 described comprehensive simulation test platform of large sunk shield entry-driving machine, it is characterized in that: described simulation shield excavation machine can be realized the conversion of soil pressure shield structure and slurry shield and the conversion that realizes multiple cutterhead.
5. as claim 1,2 or 3 described comprehensive simulation test platform of large sunk shield entry-driving machine, it is characterized in that: described portal can be realized the portal conversion of multiple shape.
6. as claim 1,2 or 3 described comprehensive simulation test platform of large sunk shield entry-driving machine, it is characterized in that: described a plurality of loading post buckets can be regulated the soil pressure of pressure size with simulation Different Strata and different depth respectively.
7. as claim 1,2 or 3 described comprehensive simulation test platform of large sunk shield entry-driving machine, it is characterized in that: described monitoring system comprises some sensors, and these some sensors are placed in the interior soil body of native case, simulate on the shield excavation machine and on the loading system.
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| CN102434166A (en) * | 2011-11-24 | 2012-05-02 | 上海交通大学 | Device and method for testing influence of tunnel excavation on existing close-distance parallel tunnels |
| CN102707036A (en) * | 2012-06-29 | 2012-10-03 | 北方重工集团有限公司 | Segmental loaded tunneling testing apparatus of full-face tunnel boring machine |
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| CN105841986B (en) * | 2016-03-28 | 2018-02-23 | 中南大学 | Counter-force transfer device and its application method are originated for indoor shield model test |
| CN106437730A (en) * | 2016-10-09 | 2017-02-22 | 上海市基础工程集团有限公司 | Inverse pulling device of shield tunneling machine |
| CN106988754A (en) * | 2017-01-22 | 2017-07-28 | 中南大学 | Narrow space shield tunneling machine starting method |
| CN107328912A (en) * | 2017-07-04 | 2017-11-07 | 北京交通大学 | The excavation face steady experimental device and its application method of a kind of use muddy water supporting |
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| CN108316933A (en) * | 2018-02-02 | 2018-07-24 | 中铁隧道局集团有限公司 | A kind of method that native case bankets in balancing earth-pressure shielding machine simulated experiment |
| CN108361042B (en) * | 2018-03-11 | 2019-10-29 | 北京工业大学 | A kind of test method for simulating the face passive failure of shallow embedding Shield Tunneling |
| CN108361042A (en) * | 2018-03-11 | 2018-08-03 | 北京工业大学 | A kind of test method of simulation shallow embedding Shield Tunneling face passive failure |
| CN108374666A (en) * | 2018-03-13 | 2018-08-07 | 中铁隧道局集团有限公司 | The method that native case bankets in earth pressure balanced shield, EPBS identification of formation research experiment |
| CN108915707A (en) * | 2018-08-24 | 2018-11-30 | 济南中铁重工轨道装备有限公司 | A kind of shield machine factory load testing device for simulating geological environment |
| CN110715860A (en) * | 2019-10-29 | 2020-01-21 | 三明学院 | Three-dimensional loading test system for underground engineering |
| CN110726825A (en) * | 2019-10-29 | 2020-01-24 | 三明学院 | Geotechnical engineering test device |
| CN110726824A (en) * | 2019-10-29 | 2020-01-24 | 三明学院 | Geotechnical engineering test system |
| CN110726823A (en) * | 2019-10-29 | 2020-01-24 | 三明学院 | Underground engineering freezing test system |
| CN116380512A (en) * | 2023-04-06 | 2023-07-04 | 中铁十局集团城市轨道交通工程有限公司 | Wall body fixing device and method for indoor shield cutting underground continuous wall experiment |
| CN116380512B (en) * | 2023-04-06 | 2023-11-07 | 中铁十局集团城市轨道交通工程有限公司 | Wall body fixing device and method for indoor shield cutting underground continuous wall experiment |
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