CN207620797U - A kind of shield tunnel construction phase Load Simulation and structural internal force test system - Google Patents
A kind of shield tunnel construction phase Load Simulation and structural internal force test system Download PDFInfo
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- CN207620797U CN207620797U CN201721580347.3U CN201721580347U CN207620797U CN 207620797 U CN207620797 U CN 207620797U CN 201721580347 U CN201721580347 U CN 201721580347U CN 207620797 U CN207620797 U CN 207620797U
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- 238000010276 construction Methods 0.000 title claims abstract description 40
- 238000012360 testing method Methods 0.000 title claims abstract description 20
- 238000004088 simulation Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002689 soil Substances 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 238000007569 slipcasting Methods 0.000 claims abstract description 13
- 238000005336 cracking Methods 0.000 claims abstract description 9
- 230000003068 static effect Effects 0.000 claims abstract description 8
- 230000001360 synchronised effect Effects 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims description 24
- 238000002474 experimental method Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 8
- 239000005341 toughened glass Substances 0.000 claims description 6
- 239000013307 optical fiber Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 238000005056 compaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 238000009533 lab test Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000009658 destructive testing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
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Abstract
The utility model discloses a kind of shield tunnel construction phase Load Simulations and structural internal force test system.The pilot system includes pushing tow load subsystem, slip casting filling subsystem, soil pressure load subsystem, Water hydraulic static pressure loading subsystem, ess-strain monitoring subsystem, pushing tow jack position, number, amount of force and the direction that its pushing tow loads subsystem are adjustable, slip casting filling subsystem can simulate shield-tunneling construction back synchronous injection load, soil pressure load subsystem can simulate the soil pressure load under the conditions of different buried depth, Water hydraulic static pressure loading subsystem can simulate the water pressure load of different heads, and ess-strain monitoring subsystem can test the stress and strain of construction time pipe-plate lining.Bulk testing system can simulate a variety of loads coupling of the shield tunnel constructions phase such as jacking force, grouting pressure, soil pressure, water pressure, and be tested with situation is destroyed the pipe-plate lining ess-strain under various loads, deformation.Pilot system can be used for studying construction mechanics behavior and the Cracking mechanism in tunnel during shield-tunneling construction.
Description
Technical field
The utility model is related to Tunnel Engineering and technical field of buildings, and in particular to a kind of shield tunnel construction phase load mould
Quasi- and structural internal force test system.
Background technology
Main bearing member of the shield tunnel segment lining as shield tunnel bears the anti-of shield machine advance in the construction time
To thrust, the soil pressure of synchronous grouting pressure and tunnel outer and water pressure load.During shield-tunneling construction, due to ground
The soft or hard unevenness of layer, such as upper firmly lower soft formation, oblique soft or hard boundary stratum etc. can cause shield attitude to be difficult to control, be susceptible to
Shield body floats and shield precursor is sagging (being commonly called as " kowtowing "), deviates pipe-plate lining axis so as to cause shield thrust, causes
Pipe-plate lining stress concentration is cracking or fragmentation, less serious case need to repair the pipe-plate lining structure of cracking or fragmentation, and severe one causes
Institute's construction tunnel section is scrapped, and this bad Engineering Projects continues to bring out in China's shield tunnel construction.However, existing engineering
Scene can not receive and carry out the destructive testing of shield-tunneling construction phase section of jurisdiction stress and structure crack；And existing laboratory test uses
Model shielding machine implements simulation, and test site requires big, cast material at least to need about 1000m3, and cost is big, and the principle of similitude
It is difficult to meet, obtained conclusion always exists dispute, and reliability is not strong.
In consideration of it, needing to develop a kind of for studying the construction mechanics behavior in tunnel and Cracking during shield-tunneling construction
The laboratory test system of mechanism, is tested by pilot system implementation model, can be in construction shield pushing tow tunnel jack quantity,
Position, output and its action direction and the maximum allowable angle of tunnel axis, grouting pressure selection, pipe-plate lining tectonic sieving, pipe
Sheet built local strengthening arrangement of reinforcement and waterproofing design etc. provide foundation.To tunnel during this system high abstraction shield machine construction
The acting in opposition of lining cutting, slip casting effect, need not simulate shield machine and its required a large amount of stratum, can substantially reduce experiment
Scale.The simulation of tunnel perimeter Different Strata pressure and water pressure can be realized simultaneously.
Utility model content
The purpose of this utility model is to provide a kind of shield tunnel construction phase Load Simulation and structural internal force testing experiment system
System is noted by the way that the system monitoring tunnel under construction pipe-plate lining is synchronous after the pushing tow load, different walls in different size and direction
Ess-strain and cracking situation, research shield when starching load, different soil pressure loads, different water pressure load couplings are applied
The construction mechanics behavior in tunnel and Cracking mechanism during work, for shield pushing tow in construction tunnel jack quantity, position,
Output and its action direction and the maximum allowable angle of tunnel axis, grouting pressure selection, pipe-plate lining tectonic sieving, pipe-plate lining
Local strengthening arrangement of reinforcement and waterproofing design etc. provide foundation.
The utility model can be realized by following scheme：
A kind of shield tunnel construction phase Load Simulation and structural internal force test system, it is very heavy by pedestal, babinet, diagonal brace
Top, rotatable reaction plate, pushing tow jack, limited block, support boots, steel plate water stopper, pipe-plate lining, reaction beam, vertical jack,
Push plate, high-pressure water pipe, tempered glass observation window, Grouting Pipe, drainpipe, hydraulic power unit, high-pressure hydraulic pump, grouting pump, fiber grating
Sensor, monitoring platform are constituted.
A kind of shield tunnel construction phase Load Simulation and structural internal force test system, including pushing tow load subsystem,
Subsystem, soil pressure load subsystem, Water hydraulic static pressure loading subsystem, ess-strain monitoring subsystem are filled in slip casting.
Pushing tow loads in subsystem, and the pushing tow jack position for acting on pipe-plate lining is adjustable, quantity is adjustable and active force
Size and Orientation is adjustable；Rotatable reaction plate lower part is hinged with pedestal, and top is hinged with diagonal brace jack, and diagonal brace jack is another
End is hinged on pedestal；Rotatable reaction plate can rotate around hinge joint, provide jacking force to pushing tow jack, and diagonal brace is very heavy very useful
Rotation angle, the jacking force of balance pushing tow jack in the rotatable reaction plate of control；A circle T-type is opened on rotatable reaction plate
The vertical chute is opened on sliding slot, T type sliding slots top, and pushing tow jack enters T-type sliding slot from the vertical chute；The very heavy top/bottom part of pushing tow is in T
Type enters T-type sliding slot by the vertical chute, is acted on pipe-plate lining by supportting boots, can be adjusted according to testing program and be put into T-type cunning
The pushing tow jack number of slot changes the position of pushing tow jack；Limited block is located in T-type sliding slot, is arranged in pushing tow jack
Both sides ensure that pushing tow jack does not slide during applying thrust；Diagonal brace jack and pushing tow jack pass through electro-hydraulic
Control valve is connected to hydraulic power unit, controls the stroke of jack by electric fluid-control valve to change size and the direction of active force.
Slip casting is filled in subsystem, and grouting pump is connect by Grouting Pipe with babinet, and grouting pump can both adjust grouting pressure
And ensure that grouting pressure is stablized, flow rate of grouting can also be controlled；Grouting Pipe is evenly arranged on the outside of pipe-plate lining, the axle center of distribution
Identical as the pipe-plate lining axle center being completed, the length of Grouting Pipe is to be slightly shorter than babinet length in babinet, ensures pipe-plate lining
Along axis direction overall length slip casting；Grouting pressure and grouting amount are adjusted according to testing program during experiment, simulate shield-tunneling construction wall
Synchronous grouting load afterwards.
Soil pressure loads in subsystem, and vertical jack is evenly arranged in push plate, and upper end is withstood on reaction beam, reaction beam
It is connected on babinet by high-strength bolt；Vertical jack is connected to hydraulic power unit by electric fluid-control valve, passes through electric pilot operated valve device
Door adjusts the stroke of vertical jack to simulate the soil pressure load under the conditions of different buried depth.
In Water hydraulic static pressure loading subsystem, high-pressure hydraulic pump is connect by high-pressure water pipe with babinet, can be adjusted hydraulic pressure and be kept steady
It is fixed, by controlling water-aspirator pressure come the pressure head needed, simulate the water pressure load of different heads；The push plate exists
It can move up and down in babinet, push plate surrounding is arranged steel side waterstop and ensures watertightness performance；After pipe-plate lining is completed, two
End setting circumferential steel side waterstop, ensures that pipe-plate lining and babinet junction watertightness are good.
In ess-strain monitoring subsystem, stress strain gauge is fiber-optic grating sensor, by fiber-optic grating sensor
It is arranged in pipe-plate lining surface, and monitoring platform is connected to by optical fiber, monitors the ess-strain and cracking situation of pipe-plate lining；
During experiment, pipe-plate lining deformation failure situation can be observed in real time by tempered glass observation window.
Above-mentioned diagonal brace jack, pushing tow jack and vertical jack respectively sets one group of electro-hydraulic control valve group, passes through hydraulic tube
Road is connected to the same hydraulic power unit.
The effect of the utility model is：A kind of shield tunnel construction phase Load Simulation and structural internal force testing experiment system
System, pushing tow jack quantity is adjustable, position is adjustable, amount of force and direction are adjustable, and soil pressure load and water pressure load can
It adjusts, influence that can be with synchronously simulating construction loads and environmental load to pipe-plate lining；In pipe-plate lining surface, connector, hand hole etc.
Position pre-sets fiber-optic grating sensor, can monitor ess-strain of the pipe-plate lining under a variety of load couplings and open
Situation is split, the construction mechanics behavior in tunnel and Cracking mechanism, instruct shield tunnel shield-tunneling construction of analyzing and researching comprehensively during
Road design and construction；It is tested compared to indoor model shield machine, the pilot system of the utility model can occupy test site less,
Reduce experimentation cost.
Description of the drawings
Fig. 1 is the structure of shield tunnel construction phase Load Simulation and structural internal force test system described in the utility model
Schematic diagram；
Fig. 2 is the appearance of shield tunnel construction phase Load Simulation and structural internal force test system described in the utility model
View；
Fig. 3 is the left view of shield tunnel construction phase Load Simulation and structural internal force test system described in the utility model
Figure；
Fig. 4 is the vertical view of shield tunnel construction phase Load Simulation and structural internal force test system described in the utility model
Figure；
Fig. 5 is the A-A of shield tunnel construction phase Load Simulation and structural internal force test system described in the utility model
Sectional view；
Fig. 6 is the cooperation schematic diagram of rotatable counter-force and pushing tow jack described in the utility model；
Fig. 7 is the cooperation schematic diagram of pushing tow jack and pipe-plate lining described in the utility model；
In figure：1- pedestals, 2- babinets, 3- diagonal braces jack, the rotatable reaction plates of 4-, 5- pushing tows jack, 6- limited blocks,
7- support boots, 8- steel plate water stoppers, 9- pipe-plate linings, 10- reaction beams, the vertical jack of 11-, 12- push plates, 13- high-pressure water pipes,
14- tempered glass observation window, 15- Grouting Pipes, 16- drainpipes, 17- hydraulic power units, 18- high-pressure hydraulic pumps, 19- grouting pumps, 20- light
Fiber grating sensor, 21- monitoring platforms.
Specific implementation mode
The utility model is further described below in conjunction with the accompanying drawings：
A kind of shield tunnel construction phase Load Simulation and structural internal force test system, by pedestal 1, babinet 2, diagonal brace thousand
Jin top 3, rotatable reaction plate 4, pushing tow jack 5, limited block 6, support boots 7, steel plate water stopper 8, pipe-plate lining 9, reaction beam 10,
Vertical jack 11, push plate 12, high-pressure water pipe 13, Grouting Pipe 14, tempered glass observation window 15, drainpipe 16, hydraulic power unit 17,
High-pressure hydraulic pump 18, grouting pump 19, fiber-optic grating sensor 20, monitoring platform 21 are constituted.
A kind of shield tunnel construction phase Load Simulation and structural internal force test system, including pushing tow load subsystem,
Subsystem, soil pressure load subsystem, Water hydraulic static pressure loading subsystem, ess-strain monitoring subsystem are filled in slip casting.
Pushing tow loads in subsystem, and 5 position of pushing tow jack for acting on pipe-plate lining 9 is adjustable, quantity is adjustable and effect
Power size and Orientation is adjustable；4 lower part of rotatable reaction plate is hinged with pedestal 1, and top is hinged with diagonal brace jack 3, and diagonal brace is very heavy
3 other ends are pushed up to be hinged on pedestal 1；Rotatable reaction plate 4 can rotate around hinge joint, provide jacking force to pushing tow jack 5, tiltedly
Support jack 3 is used to control the rotation angle of rotatable reaction plate 4, the jacking force of balance pushing tow jack 5；In rotatable counter-force
A circle T-type sliding slot is opened on plate 4, the vertical chute is opened on T-type sliding slot top, and pushing tow jack enters T-type sliding slot from the vertical chute；Pushing tow
5 bottom of jack is T-shaped, enters T-type sliding slot by the vertical chute, is acted on pipe-plate lining 9 by supportting boots 7, can be according to experiment
Project setting is put into 5 number of pushing tow jack of T-type sliding slot, changes the position of pushing tow jack 5；Limited block 6 is located at T-type sliding slot
It is interior, 5 both sides of pushing tow jack are arranged in, ensure that pushing tow jack 5 does not slide during applying thrust；Diagonal brace jack
3 and pushing tow jack 5 hydraulic power unit 17 is connected to by electric fluid-control valve, by electric fluid-control valve control jack stroke come
Change size and the direction of active force.
Slip casting is filled in subsystem, and grouting pump 19 is connect by Grouting Pipe 14 with babinet 2, and grouting pump 19 can both adjust
Grouting pressure simultaneously ensures that grouting pressure is stablized, and can also control flow rate of grouting；Grouting Pipe 14 is evenly arranged in outside pipe-plate lining 9
Side, the axle center of distribution is identical as 9 axle center of pipe-plate lining being completed, and the length of Grouting Pipe 14 is that slightly shorter than babinet is long in babinet
Degree ensures pipe-plate lining along axis direction overall length slip casting；Grouting pressure and grouting amount are adjusted according to testing program during experiment,
Simulate shield-tunneling construction back synchronous injection load.
Soil pressure loads in subsystem, and vertical jack 11 is evenly arranged in push plate 12, and upper end is withstood on reaction beam 10,
Reaction beam 10 is connected to by high-strength bolt on babinet 2；Vertical jack 11 is connected to hydraulic power unit by electric fluid-control valve
17, the soil pressure load under the conditions of different buried depth is simulated by the stroke of the vertical jack of electro-hydraulic control valve regulated 11.
In Water hydraulic static pressure loading subsystem, high-pressure hydraulic pump 18 is connect by high-pressure water pipe 13 with babinet 2, can be adjusted hydraulic pressure and be protected
It is fixed to keep steady, and by controlling water-aspirator pressure come the pressure head needed, simulates the water pressure load of different heads；Described pushes away
Plate 12 can move up and down in babinet, and steel side sealing 8 is arranged with guarantee watertightness performance in push plate surrounding；9 groups of pipe-plate lining installs
Cheng Hou is arranged circumferential steel side waterstop 8 at both ends, ensures that pipe-plate lining 9 and 2 junction watertightness of babinet are good.
In ess-strain monitoring subsystem, stress strain gauge is fiber-optic grating sensor 20, by optical fiber grating sensing
Device 20 is arranged in 9 surface of pipe-plate lining, and is connected to monitoring platform 21 by optical fiber, monitor pipe-plate lining 9 ess-strain and
Crack situation；During experiment, pipe-plate lining deformation failure situation can be observed in real time by tempered glass observation window 15.
Above-mentioned diagonal brace jack 3, pushing tow jack 5 and vertical jack 11 respectively sets one group of electro-hydraulic control valve group, passes through liquid
Pressure pipe road is connected to the same hydraulic power unit 17.
When experiment, first in a certain amount of soil of 2 bottom of babinet filling and compaction in layers, until compacted fill is filled to pipe-plate lining
When 9 position, by ring segment assembly lining cutting 9 and fiber-optic grating sensor 20 is installed, is then filled out in assembled good 9 surrounding of pipe-plate lining
Soil and compaction in layers continue fill compaction to covering 9 certain thickness of pipe-plate lining, are put into push plate 12, install vertical jack 11,
Reaction beam 10 is installed and is fixed；After adjusting diagonal brace jack 3 to suitable position, pushing tow jack 5 is installed to experiment side by root
The quantity of case；Slip casting is carried out by testing program, pushing tow pressure, soil pressure, water pressure in the after-applied scheme of slurry consolidation are opened
Beginning is tested, and the ess-strain situation of pipe-plate lining 9 is monitored.
Claims (1)
1. a kind of shield tunnel construction phase Load Simulation and structural internal force test system, it is characterised in that：
Including pushing tow load subsystem, slip casting filling subsystem, soil pressure load subsystem, Water hydraulic static pressure loading subsystem, ess-strain
Monitoring subsystem；The pushing tow jack position for acting on pipe-plate lining of pushing tow load subsystem is adjustable, quantity is adjustable and
Amount of force and direction are adjustable；Rotatable reaction plate lower part is hinged with pedestal, and top is hinged with diagonal brace jack, and diagonal brace is very heavy
The top other end is hinged on pedestal；Rotatable reaction plate can rotate around hinge joint, provide jacking force, diagonal brace thousand to pushing tow jack
Very useful rotation angle, the jacking force of balance pushing tow jack in the rotatable reaction plate of control of jin；It is opened on rotatable reaction plate
The vertical chute is opened on one circle T-type sliding slot, T-type sliding slot top, and pushing tow jack enters T-type sliding slot from the vertical chute；Pushing tow jack
Bottom is T-shaped, enters T-type sliding slot by the vertical chute, is acted on pipe-plate lining by supportting boots, can be adjusted and be put according to testing program
Enter the pushing tow jack number of T-type sliding slot, changes the position of pushing tow jack；Limited block is located in T-type sliding slot, is arranged in pushing tow
Jack both sides ensure that pushing tow jack does not slide during applying thrust；Diagonal brace jack and pushing tow jack are logical
Cross electric fluid-control valve and be connected to hydraulic power unit, the stroke of jack is controlled by electric fluid-control valve come change active force size and
Direction；The grouting pump of the slip casting filling subsystem is connect by Grouting Pipe with babinet, and grouting pump can both adjust grouting pressure
And ensure that grouting pressure is stablized, flow rate of grouting can also be controlled；Grouting Pipe is evenly arranged on the outside of pipe-plate lining, the axle center of distribution
Identical as the pipe-plate lining axle center being completed, the length of Grouting Pipe is slightly shorter than babinet length in babinet, ensures pipe-plate lining edge
Axis direction overall length slip casting；Grouting pressure and grouting amount are adjusted according to testing program during experiment, after simulating shield-tunneling construction wall
Synchronous grouting load；The vertical jack of the soil pressure load subsystem is evenly arranged in push plate, and upper end withstands on reaction beam
On, reaction beam is connected to by high-strength bolt on babinet；Vertical jack is connected to hydraulic power unit by electric fluid-control valve, passes through
The stroke of the electro-hydraulic control vertical jack of valve regulated simulates the soil pressure load under the conditions of different buried depth；The Water hydraulic static pressure loading
The high-pressure hydraulic pump of subsystem is connect by high-pressure water pipe with babinet, can be adjusted hydraulic pressure and be kept stable, by controlling water pump pressure
Power simulates the water pressure load of different heads come the pressure head needed；The push plate in babinet can on move down
Dynamic, push plate surrounding is arranged steel side waterstop and ensures watertightness performance；After pipe-plate lining is completed, circumferential steel side is set at both ends and is stopped
Water band ensures that pipe-plate lining and babinet junction watertightness are good；The ess-strain of the ess-strain monitoring subsystem senses
Device is fiber-optic grating sensor, fiber-optic grating sensor is arranged in pipe-plate lining surface, and be connected to monitoring by optical fiber and put down
Platform monitors the ess-strain and cracking situation of pipe-plate lining；During experiment, can in real time it be observed by tempered glass observation window
Pipe-plate lining deformation failure situation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721580347.3U CN207620797U (en) | 2017-11-22 | 2017-11-22 | A kind of shield tunnel construction phase Load Simulation and structural internal force test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721580347.3U CN207620797U (en) | 2017-11-22 | 2017-11-22 | A kind of shield tunnel construction phase Load Simulation and structural internal force test system |
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