CN110346161A - A kind of balancing earth-pressure shielding machine optimized experimental facility and its application method - Google Patents

A kind of balancing earth-pressure shielding machine optimized experimental facility and its application method Download PDF

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Publication number
CN110346161A
CN110346161A CN201910640361.5A CN201910640361A CN110346161A CN 110346161 A CN110346161 A CN 110346161A CN 201910640361 A CN201910640361 A CN 201910640361A CN 110346161 A CN110346161 A CN 110346161A
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CN
China
Prior art keywords
soil
plate
mold
piston
pressure
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CN201910640361.5A
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Chinese (zh)
Inventor
赵文
程诚
路博
董驾潮
王云墨
马娇
夏治康
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Northeastern University China
Northeastern University, Boston
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Northeastern University China
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Priority to CN201910640361.5A priority Critical patent/CN110346161A/en
Publication of CN110346161A publication Critical patent/CN110346161A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00Subject matter not provided for in other groups of this subclass

Abstract

The present invention relates to a kind of balancing earth-pressure shielding machine optimized experimental facilities and its application method for analyzing the optimal axial dimension of the closed soil cabin of balancing earth-pressure shielding machine.The present invention can be used for measuring the soil lateral pressure at different openings rate cutter head panel and the soil lateral pressure at soil cabin baffle, obtain the changing rule of soil lateral pressure at two, using optimality analysis, obtain the optimal axial dimension of soil cabin under cutterhead different openings rate.The cutter head panel mold simulation cutterhead of different openings rate is devised, and embedded soil pressure cell is installed on cutter head panel mold, for measuring the soil lateral pressure under different openings rate at cutter head panel;Piston back plate simulation soil cabin baffle is devised, and embedded soil pressure cell is installed on piston back plate, for measuring soil lateral pressure at soil cabin baffle.The present invention can clearly show the damage of soil body form of balancing earth-pressure shielding machine face unstability, for shield machine early period be formed the production phase design considerations is provided, it is ensured that the safety of shield machine construction and efficiently.

Description

A kind of balancing earth-pressure shielding machine optimized experimental facility and its application method
Technical field
The present invention relates to subway tunnel shield technical field and soil test device field, propose that a kind of analysis soil pressure is flat The experimental provision and its application method of the weighing apparatus optimal axial dimension of the closed soil cabin of shield machine, and in particular to a kind of balancing earth-pressure shielding machine Optimized experimental facility and its application method.
Background technique
In this economy rapid development, the epoch that the level of urbanization is continuously improved, subway construction, which becomes, expands city space The importance developed and utilized, the construction method of urban subway tunnel also become one of the key issues of numerous scholars' research. The main building method of urban subway tunnel includes cut and cover method, Mining Method, New Austrian Tunneling Method and shield method etc., and miscellaneously In iron method for tunnel construction, shield method influences small, complexity on earth's surface buildings or structures since its mechanization and the level of informatization are high The features such as geological conditions is adaptable, short time limit is used widely.Balancing earth-pressure shielding machine be it is not strong in soil body permeability and Widely used a kind of shield machine in the moderate stratum of hardness, cutterhead aperture opening ratio and the axial dimension of closed soil cabin are direct It is related to the safety and stablization of shield machine tunneling construction face.If the cutterhead aperture opening ratio when balancing earth-pressure shielding machine is certain When, the axial distance of closed soil cabin is excessive, and easily cause external soil pressure difference before soil pressure and the cutterhead inside soil cabin excessive, Lead to excavation face soil body supporting insufficient pressure, and then face unstability occurs, Important Project accident occurs for surface subsidence.
It is available in conjunction with the above problem, the axial dimension of the aperture opening ratio of the cutterhead of balancing earth-pressure shielding machine and closed soil cabin There are certain connections, thus, it is necessary to which carrying out test measures soil lateral pressure and closed soil cabin bulkhead side at cutter head panel To the variation tendency of soil pressure, and carry-over factor between the two is deduced, it is closed under different openings rate cutterhead to determine The optimal axial dimension of soil cabin.To detect above-mentioned principle, the present invention proposes a kind of experimental provision, is shield machine in sizing production early period Stage provide design considerations, it is ensured that the safety of shield machine construction and efficiently.
Summary of the invention
The optimal axial dimension of the corresponding closed soil cabin of different openings rate in order to determine earth pressure balance shield machine cutterhead, this Invention proposes a novel experiment device and its application method, which can be used for measuring at different openings rate cutter head panel Soil lateral pressure at soil lateral pressure and soil cabin baffle, obtains the changing rule of soil lateral pressure at two, utilizes optimization Analysis, obtains the optimal axial dimension of soil cabin under cutterhead different openings rate.The present invention devises the cutter head panel mould of different openings rate Tool simulation cutterhead, and embedded soil pressure cell is installed on cutter head panel mold, for measuring cutter head panel under different openings rate The soil lateral pressure at place in addition, the present invention is devising piston back plate simulation soil cabin baffle, and is installed on piston back plate Embedded soil pressure cell, for measuring soil lateral pressure at soil cabin baffle.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of balancing earth-pressure shielding machine optimized experimental facility, including model casing, shield tunnel mold, tunnel mould are fixed Plate, piston back plate, displacement controller, pitch brace, cutter head panel mold and embedded soil pressure cell.
Wherein:
Model casing is the rigid transparent rectangular parallelepiped structure of open top, selects the reserved semicircle of the box body wall of short side side Hole, for installing shield tunnel mold;
Further, the rectangular parallelepiped structure for the open top that the model casing is made of organic glass, organic glass It is assembled by frame sliding slot, it is easy to disassemble.
Further, the polyethylene film of the described model chamber interior wall covering 0.04mm, i.e., when organic glass makes its The polyethylene film of inner surface processing 0.04mm as model chamber interior wall.
Further, the model casing long side length is greater than or equal to 3 times of shield tunnel die length, bond length More than or equal to 3 times of shield tunnel mould diameter.
Shield tunnel mold is semicylindrical body, and shield tunnel mold uses steel material, the reserved semicircle of insertion model casing It in duct, and is fixed by tunnel mould fixed plate, simulates the shield tunnel built up;
Tunnel mould fixed plate uses steel plate, be provided with by the identical gap of shield tunnel outer mold wall shape, gap On sealing strip is installed, so that shield tunnel mold is fixed, and model casing side wall is fixed on by tunnel mould bolt On;
Piston back plate is semi-circular sheet steel, is embedded in shield tunnel mold, and piston back plate is for simulating in soil cabin Wall, there are screw thread card slots at piston back plate geometric center, for installing pitch brace;Piston back plate screw thread card slot it is another On side, the reserving hole of embedded soil pressure cell is placed in setting;Piston back plate outer edge smears one layer of solid lubrication oil, It can be realized piston back plate and be close to the effect free to slide with sealing of shield tunnel mould inner wall;
Further, on the another side of the piston back plate screw thread card slot, up and down around geometric center Four reserving holes are set, for placing embedded soil pressure cell.
Pitch brace is that one end is threadedly coupled with piston back plate, and the other end connects displacement sensor, and on pitch brace Mechanics sensor, the axle power of display pole on displacement controller are installed;
Displacement controller is connect by pitch brace with piston back plate, and positioner controls the mobile speed of pitch brace Rate pulls piston back plate, so that piston back plate is close to shield tunnel mould inner wall and slides away from excavation face direction, to realize Tunnel excavation face gradually unstability;
Further, it is set on the displacement controller there are three window, three windows are respectively that window is arranged, and display moves It is dynamic to show the window of pitch brace axle power apart from window,
Cutter head panel mold is semi-cylindrical shaped structure, is engaged and installed in the on-fixed that shield tunnel mold protrudes into model casing End is equipped with reserving hole for placing embedded soil pressure cell for simulating practical shield cutter on cutter head panel mold;
Further, the cutter head panel mold is set as the cutterhead mold of multiple and different aperture opening ratios, and aperture opening ratio is 30%~50%, the aperture opening ratio refers to the ratio between the area of aperture position and the panel gross area of cutter head panel mold.
Embedded soil pressure cell is separately mounted in the reserving hole of cutter head panel mold and piston back plate, for measuring The soil pressure of cutter head panel die surface and the soil pressure on piston back plate surface.
Further, balancing earth-pressure shielding machine optimized experimental facility of the present invention also sets up experimental data collection device, experiment Transacter connects embedded soil pressure cell, and experimental data collection device fixed time intervals acquire embedded soil pressure cell Measurement experiment data.
The application method of above-mentioned balancing earth-pressure shielding machine optimized experimental facility, steps are as follows:
(1) shield tunnel mold is installed
Before shield tunnel mold is inserted into model casing, the work of insertion installation semi-circular sheet steel structure in shield tunnel mold Plug baffle, piston back plate is for simulating soil cabin inner wall, and piston back plate is threadedly coupled with pitch brace, and pitch brace is another End connection displacement sensor, and mechanics sensor is installed on pitch brace;Embedded soil pressure cell is mounted on piston back plate In reserving hole;
(2) experimental provision assembles
Shield tunnel mold is inserted into model casing, and shield tunnel die horizontal is placed, and tunnel mould fixed plate passes through tunnel Shield tunnel mold is fixed on model casing side wall by diebolt;Cutter head panel mold is engaged and installed in shield tunnel Mold protrudes into the on-fixed end in model casing, and for simulating practical shield cutter, embedded soil pressure cell is mounted on cutter head panel In the reserving hole of mold;
(3) it bankets and is tested
It after experimental provision is completed, bankets into model casing, after soil fills up model casing, is drawn by displacement controller Piston pull rod, and then drive piston back plate to be close to shield tunnel mould inner wall and slided away from excavation face direction, until area Face collapses completely;
The soil lateral pressure situation of change at cutterhead can be measured by the embedded soil pressure cell on cutter head panel mold, The soil lateral pressure at simulation soil cabin inner wall piston back plate can be measured by the embedded soil pressure cell on piston back plate Situation of change is replaced the cutterhead mold of different openings rate, is repeated the above process after then pouring out the filling soil body;
(4) data processing
To the soil lateral pressure monitoring data at different openings rate cutter head panel mold and the lateral soil at piston back plate Pressure monitoring data are analyzed, and using principle of optimality, are obtained under earth pressure balance shield machine cutterhead aperture opening ratio different condition, The optimal axial dimension of closed soil cabin.
Compared with the prior art, the invention has the advantages that:
Novel and unique of the present invention, it is easy to operate, it can clearly show the soil body of balancing earth-pressure shielding machine face unstability Damage -form is more accurately analyzed in addition, the present invention can measure on closed soil cabin baffle with the soil pressure on cutter head panel Soil pressure is poor inside and outside the closed soil cabin of earth pressure balance shield machine, obtains carry-over factor of the soil pressure in closed soil cabin, finds out knife The relationship of dish opening rate and closed soil cabin axial dimension provides design considerations in sizing production phase early period for shield machine, it is ensured that The safety of shield machine construction and efficiently.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts, It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of balancing earth-pressure shielding machine optimized experimental facility in the embodiment of the present invention 1;
Fig. 2 is the structural schematic diagram of tunnel mould fixed plate in Fig. 1;
Fig. 3 is the structural schematic diagram of piston back plate in Fig. 1;
Fig. 4 is pitch brace and piston back plate connection schematic diagram in Fig. 1;
Fig. 5 is shield tunnel mold and cutter head panel mold connection schematic diagram;
Fig. 6 is the cutter head panel mold structure diagram of different openings rate, and wherein Fig. 6 (a) is the knife that aperture opening ratio is 30% Disk board mold structural schematic diagram, Fig. 6 (b) are the cutter head panel mold structure diagram that aperture opening ratio is 40%, and Fig. 6 (c) is to open The cutter head panel mold structure diagram that mouth rate is 50%;
Fig. 7 is the structural schematic diagram of displacement controller;
In figure: 1: model casing;2: shield tunnel mold;3: tunnel mould fixed plate;4: tunnel mould bolt;5: piston type Baffle;5-1: screw thread card slot;5-2: reserving hole;6: displacement controller;6-1: setting window;6-2 shows the window of moving distance Mouthful;6-3: the window of display pitch brace axle power;6-4: start button;6-5: start button;6-6: stop button;6-7: displacement Reset button;7: pitch brace;8: the cutterhead mold of different openings rate;8-1: the cutter head panel mold that aperture opening ratio is 30%;8- 2: the cutter head panel mold that aperture opening ratio is 40%;8-3: the cutter head panel mold that aperture opening ratio is 50%;8-1-1: cutterhead;8-1-2: Opening;8-1-3: the hole for placing soil pressure cell is reserved on cutterhead;The same 8-1-1 of 8-2-1 and 8-3-1;The same 8- of 8-2-2 and 8-3-2 1-2;The same 8-1-3 of 8-2-3 and 8-3-3;9: embedded soil pressure cell;10: sealing strip.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only It is only a part of the embodiment of the present invention, instead of all the embodiments.It is real to the description of at least one exemplary embodiment below It is merely illustrative on border, never as to the present invention and its application or any restrictions used.Based on the reality in the present invention Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to In the scope of protection of the invention.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to exemplary embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singular Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments It is not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be clear that for ease of description, each portion shown in attached drawing The size divided not is to draw according to actual proportionate relationship.Technology known for person of ordinary skill in the relevant, side Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation A part of book.In shown here and discussion all examples, appointing should be construed as merely illustratively to occurrence, and Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should also be noted that similar label Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached It does not need that it is further discussed in figure.
In the description of the present invention, it is to be understood that, the noun of locality such as " front, rear, top, and bottom, left and right ", " it is laterally, vertical, Vertically, orientation or positional relationship indicated by level " and " top, bottom " etc. is normally based on orientation or position shown in the drawings and closes System, is merely for convenience of description of the present invention and simplification of the description, in the absence of explanation to the contrary, these nouns of locality do not indicate that It must have a particular orientation or be constructed and operated in a specific orientation with the device or element for implying signified, therefore cannot manage Solution is limiting the scope of the invention: the noun of locality " inside and outside " refers to inside and outside the profile relative to each component itself.
For ease of description, spatially relative term can be used herein, as " ... on ", " ... top ", " ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction " Side " or " under its device or construction ".Thus, exemplary term " ... top " may include " ... top " and " in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and And respective explanations are made to the opposite description in space used herein above.
In addition, it should be noted that, limiting components using the words such as " first ", " second ", it is only for be convenient for Corresponding components are distinguished, do not have Stated otherwise such as, there is no particular meanings for above-mentioned word, therefore should not be understood as to this The limitation of invention protection scope.
Embodiment 1
As shown in Figure 1, a kind of balancing earth-pressure shielding machine optimized experimental facility, including model casing 1, shield tunnel mold 2, tunnel Road mold fixed plate 3, piston back plate 5, displacement controller 6, pitch brace 7, cutter head panel mold 8 and embedded soil pressure cell 9;
Wherein:
The rectangular parallelepiped structure for the open top that model casing 1 is made of organic glass, 1 inside dimension length × width × height of model casing For 1200mm × 750mm × 600mm, organic glass wall thickness selects 10mm, to reduce rubbing for material and 1 internal side wall of model casing It wipes, its polyethylene film as the inner surface processing 0.04mm of 1 inner wall of model casing in organic glass production;Organic glass is logical It is assembled to cross frame sliding slot, it is easy to disassemble;Select the reserved diameter of 1 wall of model casing of short side side for the semi-circular hole of 230mm, For installing shield tunnel mold 2.Model test requires 1 length of model casing to be greater than or equal to the 3 of 2 diameter of shield tunnel mold Times, more completely show the coverage of test result.
Shield tunnel mold 2 is semicylindrical body, and shield tunnel mold 2 uses steel material, long 400mm, internal diameter 200mm, steel Tube thickness is 10mm, in the reserved semicircle duct of insertion model casing 1, simulates the shield tunnel built up.
As shown in Fig. 2, tunnel mould fixed plate 3 is the lower left corner there are a length of 300mm of semicircle gap, width 200mm, The steel plate of thick 5mm, semicircle gap diameter are 240mm, and having a layer thickness in gap is the rubber packing item 10 of 10mm, tunnel Shield tunnel mold is fixed by mold fixed plate 3, and is fixed on 1 side wall of model casing by tunnel mould bolt 4;
As shown in figure 3, piston back plate 5 is the semi-circular sheet steel of diameter 200mm, thickness 10mm, it is embedded in shield tunnel mould In tool 2, one layer of solid lubrication oil is smeared in 5 edge of piston back plate, can be realized piston back plate 5 and is close to shield tunnel mold The effect free to slide with sealing of 2 inner walls.Piston back plate 5 is for simulating soil cabin inner wall, and there are screw thread cards at geometric center Slot 5-1, for installing pitch brace 7 (as shown in Figure 4), the other side of screw thread card slot 5-1 on piston back plate 5 is left up and down Four reserving hole 5-2 of right setting, for placing embedded soil pressure cell 9;
Pitch brace 7 is the steel pole of diameter 10mm, and with piston back plate 5 using being threadedly coupled, the other end is used to one end Connect displacement sensor 6, and install mechanics sensor additional on pitch brace 7, can on displacement controller 6 display pole axle power;
As shown in fig. 7, being set on displacement controller 6 there are three window and four buttons, three windows are respectively that window is arranged 6-1 shows moving distance window 6-2, shows the window 6-3 of pitch brace axle power;Four buttons, including command displacement controller Start button 6-4, start button 6-5, stop button 6-6, be displaced reset button 6-7.Displacement controller 6 passes through pitch brace 6 connect with piston back plate 5, and the rate travel by setting pitch brace 7 pulls piston back plate 5, keep piston back plate 5 tight It pastes 2 inner wall of shield tunnel mold to slide away from excavation face direction, to realize tunnel excavation face gradually unstability;
As shown in figure 5, cutter head panel mold 8 is mounted on the on-fixed end of shield tunnel mold 2, cutter head panel mold 8 is whole It is 224mm that external side profile, which is diameter d, and thickness a is 10mm at cutter head panel, and length h is 50mm, half of wall thickness 2mm Shape structure is equipped with reserving hole for placing embedded soil pressure for simulating practical shield cutter on cutter head panel mold 8 Box 9.Cutter head panel grinding tool 8 is equipped with different openings rate, and in practical projects, balancing earth-pressure shielding machine aperture opening ratio is 30%~50% It differs, as shown in fig. 6, the cutter head panel mold that aperture opening ratio is respectively 30%, 40%, 50% is arranged in the present embodiment;It is described to open Mouth rate refers to the ratio between area and cutterhead gross area of aperture position.8-1 is the cutter head panel that aperture opening ratio is 30% in Fig. 6 (a) Mold, 8-2 is the cutter head panel mold that aperture opening ratio is 40% in Fig. 6 (b), and 8-3 is the cutterhead that aperture opening ratio is 50% in Fig. 6 (c) Panel mold;8-1-1 is cutterhead, area S in Fig. 6 (a)1, 8-1-2 is opening, area S2, 8-1-3 is pre- on cutterhead Stay the hole for placing soil pressure cell.8-2-1 and the same 8-1- of 8-3-1 same 8-1-1,8-2-2 and 8-3-2 in Fig. 6 (b) and Fig. 6 (c) The same 8-1-3 of 2,8-2-3 and 8-3-3;That is cutterhead aperture opening ratio is
The surface that embedded soil pressure cell 9 is separately mounted to 8 surface of cutter head panel mold and piston back plate 5 is reserved In hole, for measure 8 surface of cutterhead mold 5 surface of soil pressure and piston back plate soil pressure.
The present invention be arranged experimental data collection device, the collection terminal of test data is exactly laptop, using with it is each The matched software of a electronic component, every the test monitoring data of acquisition in 0.1 second, data source is the soil pressure of installation early period Other electronic components such as box record the detailed variation tendency of each data of test process in detail.
The application method of above-mentioned balancing earth-pressure shielding machine optimization method and experimental provision, steps are as follows:
(1) shield tunnel mold is installed
Before shield tunnel mold 2 is inserted into model casing 1, the insertion installation semi-circular sheet steel structure in shield tunnel mold 2 Piston back plate 5, piston back plate 5 is for simulating soil cabin inner wall, and piston back plate 5 is threadedly coupled with pitch brace 7, piston 7 other end of pull rod connects displacement sensor 6, and installs mechanics sensor on pitch brace 7;Embedded soil pressure cell 9 is mounted on In the reserving hole 5-2 of piston back plate 5;
(2) experimental provision assembles
Shield tunnel mold 2 is inserted into model casing 1, and shield tunnel mold 2 is horizontal positioned, and tunnel mould fixed plate 3 passes through Shield tunnel mold 2 is fixed on 1 side wall of model casing by tunnel mould bolt 4;It is 30% cutter head panel mould by aperture opening ratio Tool 8-1 is engaged and installed in the on-fixed end that shield tunnel mold 2 protrudes into model casing 1, for simulating practical shield cutter, is embedded in Formula soil pressure cell 9 is mounted in the reserving hole 8-1-3 of cutter head panel mold 8-1;
(3) it bankets and is tested
It after experimental provision is completed, bankets into model casing 1, after soil fills up model casing 1, passes through displacement controller 6 pull pitch brace 7, and then drive piston back plate 5 to be close to 2 inner wall of shield tunnel mold and slide away from excavation face direction, directly It collapses completely to face;
The variation of the soil lateral pressure at cutterhead can be measured by the embedded soil pressure cell 9 on cutter head panel mold 8-1 Situation can measure the side of the piston back plate 5 of simulation soil cabin inner wall by the embedded soil pressure cell 9 on piston back plate 5 To soil pressure situation of change, after then pouring out the filling soil body, replacement aperture opening ratio is 40% cutter head panel mold 8-2 cutterhead mould Tool, repeats the above process;It then is that 50% cutter head panel mold 8-3 is repeated the above process in replacement aperture opening ratio;
(4) data processing
To the soil lateral pressure monitoring data at different openings rate cutter head panel mold and the lateral soil at piston back plate Pressure monitoring data are analyzed, and using principle of optimality, are obtained under earth pressure balance shield machine cutterhead aperture opening ratio different condition, The optimal axial dimension of closed soil cabin.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations;To the greatest extent Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into Row equivalent replacement;And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution The range of scheme.

Claims (9)

1. a kind of balancing earth-pressure shielding machine optimized experimental facility, which is characterized in that the device includes model casing, shield tunnel mould Tool, tunnel mould fixed plate, piston back plate, displacement controller, pitch brace, cutter head panel mold and embedded soil pressure Box;
Wherein:
Model casing is the rigid transparent rectangular parallelepiped structure of open top, selects the box body wall of short side side to reserve semi-circular hole, uses In installation shield tunnel mold;
Shield tunnel mold is semicylindrical body, and shield tunnel mold uses steel material, the reserved semicircle duct of insertion model casing It is interior, and fixed by tunnel mould fixed plate, simulate the shield tunnel built up;
Tunnel mould fixed plate uses steel plate, is provided with by the identical gap of shield tunnel outer mold wall shape, pacifies on gap Equipped with sealing strip, shield tunnel mold is fixed by tunnel mould fixed plate, and is fixed on model by tunnel mould bolt On case side wall;
Piston back plate is semi-circular sheet steel, is embedded in shield tunnel mold, and piston back plate is living for simulating soil cabin inner wall There are screw thread card slots at plug baffle geometric center, for installing pitch brace;The another side of piston back plate screw thread card slot On, the reserving hole of embedded soil pressure cell is placed in setting;Piston back plate outer edge smears one layer of solid lubrication oil, can Realize that piston back plate is close to the effect free to slide with sealing of shield tunnel mould inner wall;
Pitch brace is that one end is threadedly coupled with piston back plate, and the other end connects displacement sensor, and installs on pitch brace Mechanics sensor, the axle power of display pole on displacement controller;
Displacement controller is connect by pitch brace with piston back plate, and positioner controls the rate travel of pitch brace, Piston back plate is pulled, so that piston back plate is close to shield tunnel mould inner wall and is slided away from excavation face direction, to realize tunnel Road excavation face gradually unstability;
Cutter head panel mold is semi-cylindrical shaped structure, is engaged and installed in the on-fixed end that shield tunnel mold protrudes into model casing, For simulating practical shield cutter, reserving hole is equipped on cutter head panel mold for placing embedded soil pressure cell;
Embedded soil pressure cell is separately mounted in the reserving hole of cutter head panel mold and piston back plate, for measuring cutterhead The soil pressure on panel mold surface and the soil pressure on piston back plate surface.
2. balancing earth-pressure shielding machine optimized experimental facility according to claim 1, which is characterized in that the model casing is By the rectangular parallelepiped structure for the open top that organic glass forms, organic glass is assembled by frame sliding slot.
3. balancing earth-pressure shielding machine optimized experimental facility according to claim 2, which is characterized in that in the model casing Wall covers the polyethylene film of 0.04mm, i.e. its inner surface processing 0.04mm as model chamber interior wall when organic glass makes Polyethylene film.
4. balancing earth-pressure shielding machine optimized experimental facility according to claim 1, which is characterized in that the model casing is long Edge lengths are greater than or equal to 3 times of shield tunnel die length, and bond length is greater than or equal to the 3 of shield tunnel mould diameter Times.
5. balancing earth-pressure shielding machine optimized experimental facility according to claim 1, which is characterized in that the piston type gear It is embedded for placing around four reserving holes of setting up and down of geometric center on the another side of plate screw thread card slot Soil pressure cell.
6. balancing earth-pressure shielding machine optimized experimental facility according to claim 1, which is characterized in that the cutter head panel Mold is set as the cutterhead mold of multiple and different aperture opening ratios, and aperture opening ratio is 30%~50%, and the aperture opening ratio refers to opening position The ratio between the panel gross area of the area and cutter head panel mold set.
7. balancing earth-pressure shielding machine optimized experimental facility according to claim 1, which is characterized in that the Bit andits control It is set on device there are three window, three windows are respectively that window is arranged, and show moving distance window, show the window of pitch brace axle power Mouthful.
8. balancing earth-pressure shielding machine optimized experimental facility according to claim 1, which is characterized in that setting experimental data is received Acquisition means, experimental data collection device connect embedded soil pressure cell, and the acquisition of experimental data collection device fixed time intervals is embedding Enter the measurement experiment data of formula soil pressure cell.
9. the application method of balancing earth-pressure shielding machine optimized experimental facility described in claim 1, which is characterized in that step is such as Under:
(1) shield tunnel mold is installed
Before shield tunnel mold is inserted into model casing, the piston type of insertion installation semi-circular sheet steel structure in shield tunnel mold Baffle, for simulating soil cabin inner wall, piston back plate is threadedly coupled piston back plate with pitch brace, and the pitch brace other end connects Displacement sensor is connect, and mechanics sensor is installed on pitch brace;Embedded soil pressure cell is mounted on the reserved of piston back plate In hole;
(2) experimental provision assembles
Shield tunnel mold is inserted into model casing, and shield tunnel die horizontal is placed, and tunnel mould fixed plate passes through tunnel mould Shield tunnel mold is fixed on model casing side wall by bolt;Cutter head panel mold is engaged and installed in shield tunnel mold The on-fixed end in model casing is protruded into, for simulating practical shield cutter, embedded soil pressure cell is mounted on cutter head panel mold Reserving hole in;
(3) it bankets and is tested
It after experimental provision is completed, bankets into model casing, after soil fills up model casing, is pulled and lived by displacement controller Pull rod is filled in, and then drives piston back plate to be close to shield tunnel mould inner wall and is slided away from excavation face direction, until face is complete It is complete to collapse;
The soil lateral pressure situation of change at cutterhead can be measured by the embedded soil pressure cell on cutter head panel mold, is passed through Embedded soil pressure cell on piston back plate can measure the soil lateral pressure at the piston back plate of simulation soil cabin inner wall and become Change situation, after then pouring out the filling soil body, replaces the cutterhead mold of different openings rate, repeat the above process;
(4) data processing
To the soil lateral pressure monitoring data at different openings rate cutter head panel mold and the soil lateral pressure at piston back plate Monitoring data are analyzed, and using principle of optimality, are obtained under earth pressure balance shield machine cutterhead aperture opening ratio different condition, closed The optimal axial dimension of soil cabin.
CN201910640361.5A 2019-07-16 2019-07-16 A kind of balancing earth-pressure shielding machine optimized experimental facility and its application method Pending CN110346161A (en)

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09210767A (en) * 1996-02-06 1997-08-15 Fujita Corp Abnormality annunciation method for shield excavator
CN103175729A (en) * 2013-03-06 2013-06-26 同济大学 Shield tunnel excavation surface stability centrifuge model test matching apparatus
CN103278376A (en) * 2013-05-29 2013-09-04 浙江大学 Test device of stability control model of earth pressure balance shield excavation surface
WO2014016173A2 (en) * 2012-07-23 2014-01-30 Bayerische Motoren Werke Aktiengesellschaft Mobile test bed assembly on a movable pallet construction for performing an emc measurement
CN105021418A (en) * 2015-07-22 2015-11-04 河海大学 Shield excavation face model suitable for soil engineeringcentrifugal model test and simulation method
CN106289614A (en) * 2016-08-17 2017-01-04 上海交通大学 The model test apparatus of Indoor measurement Earth Pressure for Shield Tunnel Lining and method
CN107560879A (en) * 2017-08-29 2018-01-09 西南石油大学 A kind of experimental rig and application method of simulation tunnel excavation face unstability
CN108457657A (en) * 2018-03-11 2018-08-28 北京工业大学 A kind of test method that simulation Shield Tunneling face is actively destroyed
CN108506004A (en) * 2018-03-11 2018-09-07 北京工业大学 Soil pressure transfer law device and method inside model shielding machine in active destructive process
CN108548683A (en) * 2018-03-23 2018-09-18 北京交通大学 Monitoring on Earth Pressure system and test method for shield model test machine
CN108956942A (en) * 2018-06-14 2018-12-07 上海建工集团股份有限公司 The experimental rig and method that simulation shield tunneling face unstability influences pipeline architecture
CN109342695A (en) * 2018-11-08 2019-02-15 武汉理工大学 Reduced scale experimental rig in a kind of removable supporting room for shallow soft stratum model

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09210767A (en) * 1996-02-06 1997-08-15 Fujita Corp Abnormality annunciation method for shield excavator
WO2014016173A2 (en) * 2012-07-23 2014-01-30 Bayerische Motoren Werke Aktiengesellschaft Mobile test bed assembly on a movable pallet construction for performing an emc measurement
CN103175729A (en) * 2013-03-06 2013-06-26 同济大学 Shield tunnel excavation surface stability centrifuge model test matching apparatus
CN103278376A (en) * 2013-05-29 2013-09-04 浙江大学 Test device of stability control model of earth pressure balance shield excavation surface
CN105021418A (en) * 2015-07-22 2015-11-04 河海大学 Shield excavation face model suitable for soil engineeringcentrifugal model test and simulation method
CN106289614A (en) * 2016-08-17 2017-01-04 上海交通大学 The model test apparatus of Indoor measurement Earth Pressure for Shield Tunnel Lining and method
CN107560879A (en) * 2017-08-29 2018-01-09 西南石油大学 A kind of experimental rig and application method of simulation tunnel excavation face unstability
CN108457657A (en) * 2018-03-11 2018-08-28 北京工业大学 A kind of test method that simulation Shield Tunneling face is actively destroyed
CN108506004A (en) * 2018-03-11 2018-09-07 北京工业大学 Soil pressure transfer law device and method inside model shielding machine in active destructive process
CN108548683A (en) * 2018-03-23 2018-09-18 北京交通大学 Monitoring on Earth Pressure system and test method for shield model test machine
CN108956942A (en) * 2018-06-14 2018-12-07 上海建工集团股份有限公司 The experimental rig and method that simulation shield tunneling face unstability influences pipeline architecture
CN109342695A (en) * 2018-11-08 2019-02-15 武汉理工大学 Reduced scale experimental rig in a kind of removable supporting room for shallow soft stratum model

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
李姣阳等: "浅埋盾构隧道开挖面失稳大比尺模型试验研究", 《岩土工程学报》 *
王洪新: "土压平衡盾构刀盘开口率对土舱压力的影响", 《地下空间与工程学报》 *
金大龙等: "盾构土舱压力变化规律测试试验与理论分析", 《岩石力学与工程学报》 *

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