CN108932902A - A kind of Lining Ring design methods of analog shield tunnel girth joint - Google Patents
A kind of Lining Ring design methods of analog shield tunnel girth joint Download PDFInfo
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- CN108932902A CN108932902A CN201810654816.4A CN201810654816A CN108932902A CN 108932902 A CN108932902 A CN 108932902A CN 201810654816 A CN201810654816 A CN 201810654816A CN 108932902 A CN108932902 A CN 108932902A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/04—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of buildings
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Abstract
The present invention relates to a kind of Lining Ring design methods of analog shield tunnel girth joint, comprising the following steps: 1) according to likelihood ratio principle, determines lining cutting ring model internal-and external diameter and longitudinal width, form Lining Ring mold；2) prototype tunnel girth joint is simulated with longitudinal subdivision piece, intend prototype tunnel circumferential direction bolt with built-in metal ring moulds, longitudinal subdivision piece and built-in metal ring is arranged in the cross section diameter for designing the built-in metal ring in the Lining Ring mold, forms lining cutting ring skeleton；3) proportion for designing fine concrete material, pours to form lining cutting ring model based on the lining cutting ring skeleton.Compared with prior art, the present invention has many advantages, such as that design method is succinctly easy, simulation is accurate, low cost.
Description
Technical field
The invention belongs to field of civil engineering, more particularly, to a kind of lining cutting ring moulds of analog shield tunnel girth joint
Type design method.
Background technique
Shield tunnel is one of the structure type being most widely used in underground space development, domestic and international a large amount of vcehicular tunnels
Shield construction is all made of with rail tunnel.Due to the complexity and particularity of shield tunnel itself, related class is being carried out
When topic research, it is often necessary to consider that the tunnel structure of certain length, such as tunnel differential settlement are studied, caused by constructing tunnel
Surface collapse, the anti-seismic performance research in tunnel etc., project research can not carry out a large amount of repetitive test to prototype tunnel, only
The method that model test can be used, therefore a kind of shield tunnel liner ring model design method of science is just particularly important.
The most important discontinuity for being characterized in that its structure of shield tunnel, tunnel is assembled by section of jurisdiction and bolt, forms a large amount of
Circumferential weld and longitudinal joint.In existing documents and materials, equivalent process has been carried out to the discontinuity of shield tunnel, that is, has considered seam
Reduction effect to tunnel rigidity, the lining thickness of model is suitably reduced, or local grooving carrys out mould on lining cutting ring model
Quasi- seam is to the reduction effect of rigidity, and such design method can be in the structure feature for macroscopically simulating tunnel entirety, but nothing
Body of laws shows the construction feature of the various seams of prototype tunnel, and exactly shield tunnel is most weak is easiest to destroy for seam areas
Part.Therefore it needs to propose a kind of completely new shield tunnel liner ring model design method, there is model and prototype
The identical seam construction feature in tunnel, also wants cheap, simple for production, meets the high-volume demand of model test.
Summary of the invention
It is high that it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of authenticities, can have
The shield tunnel liner ring model design method of effect simulation tunnel structure discontinuity.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of Lining Ring design methods of analog shield tunnel girth joint, comprising the following steps:
1) according to likelihood ratio principle, lining cutting ring model internal-and external diameter and longitudinal width are determined, forms Lining Ring mold；
2) prototype tunnel girth joint is simulated with longitudinal subdivision piece, intends prototype tunnel circumferential direction bolt with built-in metal ring moulds,
Longitudinal subdivision piece and built-in metal ring, shape is arranged in the cross section diameter for designing the built-in metal ring in the Lining Ring mold
At lining cutting ring skeleton；
3) proportion for designing fine concrete material, pours to form lining cutting ring model based on the lining cutting ring skeleton.
Further, the quantity of the longitudinal subdivision piece and position are opposite with the quantity of prototype tunnel girth joint and position
It answers.
Further, the in-plane of the longitudinal subdivision piece is arranged along the width direction of lining cutting ring model.
Further, the number of the built-in metal ring is identical as the circumferential bolt number of prototype tunnel girth joint.
Further, the longitudinal subdivision on piece is equipped with for the through-hole across the built-in metal ring.
Further, the cross section diameter of the built-in metal ring meets following formula:
Wherein: EsmFor built-in metal ring tension elasticity modulus, d is built-in metal ring cross section diameter, SEFor elasticity modulus phase
Like than SlFor geometric similarity ratio, EsFor prototype tunnel circumferential direction bolt tension elasticity modulus, D is that prototype tunnel circumferential direction bolt section is straight
Diameter.
Further, the proportion of the fine concrete material meets the elasticity modulus of fine concrete material following public
Formula:
Ecm=SEEc
Wherein, EcmFor the elasticity modulus of fine concrete material, SEFor the elasticity modulus likelihood ratio, EcFor prototype tunnel coagulation
Native elasticity modulus.
Further, the longitudinal subdivision piece using aluminium flake make, the aluminium flake with a thickness of 0.25mm-0.75mm.
Further, the built-in metal ring is using high-intensitive carbon steel wire production.
Compared with prior art, the invention has the following advantages:
1) present invention simulates prototype tunnel girth joint with longitudinal subdivision piece, and it is circumferential to intend prototype tunnel with built-in metal ring moulds
Bolt can obtain girth joint construction identical with prototype tunnel, and Lining Ring is fully disconnected by the built-in metal piece in model,
True longitudinal joint connecting structure is formed, simulation precision is high.
2) section of jurisdiction of prototype tunnel and circumferential bolt carry out reduced scale design according to geometry and the elasticity modulus likelihood ratio, obtain
Lining cutting ring model strictly meet model likelihood ratio design requirement.
3) the lining cutting ring model that can conveniently design through the invention is assembled into whole tunnel model, can accurately simulate prototype
The circumferential weld in tunnel constructs.
4) present invention pours the main body to form lining cutting ring model by the proportion of design fine concrete material, low cost,
It is simple for production, can batch making, meet the needs of a large amount of repetitive tests, compared to other plastics, the model of gypsum material, with knot
Structure prototype is closer.
5) cross section diameter of the proportion of present invention design fine concrete and built-in metal ring, meets rigidity of model similar
Than requiring.
6) design method of the present invention is succinctly easy.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is the lining cutting ring model front view (unit: mm) of present invention design example；
Fig. 3 is the A-A sectional view (unit: mm) of design example shown in Fig. 2；
Fig. 4 is the shim design drawing (unit: mm) of present invention design example；
Fig. 5 is the shim schematic diagram of present invention design example；
Fig. 6 is the becket schematic diagram of present invention design example.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
As shown in Figure 1, the present invention provides a kind of Lining Ring design methods of analog shield tunnel girth joint, packet
Include following steps:
1) according to likelihood ratio principle, lining cutting ring model internal-and external diameter and longitudinal width are determined, forms Lining Ring mold.
2) prototype tunnel girth joint is simulated with longitudinal subdivision piece, intends prototype tunnel circumferential direction bolt with built-in metal ring moulds,
Longitudinal subdivision piece and built-in metal ring, shape is arranged in the cross section diameter for designing the built-in metal ring in the Lining Ring mold
At lining cutting ring skeleton.
The quantity of longitudinal subdivision piece and position are corresponding with the quantity of prototype tunnel girth joint and position, longitudinal subdivision piece
In-plane along Lining Ring model ontology width direction.
The number of built-in metal ring is identical as the circumferential bolt number of prototype tunnel girth joint, and longitudinal subdivision on piece is equipped with
For passing through the through-hole of the built-in metal ring, built-in metal ring runs through entire lining cutting ring model.
3) proportion for designing fine concrete material, pours to form lining cutting ring model based on the lining cutting ring skeleton.
The lining cutting ring model that is formed by the above method is as shown in Fig. 2, including die body 1 and being set to die body
Longitudinal subdivision piece 2 and built-in metal ring 3 in 1.
Embodiment
Prototype tunnel is certain electric power tunnel, and outer diameter 11.6m, section of jurisdiction thickness 550mm, the wide 2m in section of jurisdiction poured using C60 concrete
It builds, elasticity modulus 36000MPa, Lining Ring is made of 1 section of jurisdiction of binding, 2 adjacent sections of jurisdiction and 5 standard sections of jurisdiction, section of jurisdiction of binding
Corresponding 16 ° of central angle, it is 49 ° that remaining section of jurisdiction, which corresponds to central angle, forms 8 girth joints at the interconnection of section of jurisdiction altogether, each
Girth joint is bolted by 3 circumferential directions, and circumferential bolt is M36 bolt, elasticity modulus 206000MPa.
According to experimental condition, cover half type geometric similarity ratio S is takenl=1/20, elasticity modulus likelihood ratio SE=1/6.
According to conditions above, finally lining cutting ring model outer diameter be 580mm, internal diameter 525mm, it is wide with a thickness of 27.5mm
Degree is 100mm.
Each girth joint has 3 circumferential bolts in prototype tunnel, therefore 3 pre-buried gold should be arranged in lining cutting ring model
Belong to ring, each becket runs through entire lining cutting ring model, and becket is surveyed using high-intensitive carbon steel wire production through pull-out test
Fixed, steel wire elasticity modulus is 170000MPa, using following formula:
Wherein:
Esm--- model metal ring tension elasticity modulus is 170000MPa,
D --- model metal ring cross section diameter,
SE--- the elasticity modulus likelihood ratio is 1/6,
Sl--- geometric similarity ratio is 1/20,
Es--- prototype tunnel circumferential direction bolt tension elasticity modulus is 206000MPa,
D --- prototype tunnel circumferential direction bolt cross section diameter is 36mm.
Finally obtaining becket cross section diameter is 0.80mm, thus can determine that pre-buried 3 cross section diameters are in lining cutting ring model
The high-intensitive carbon steel metal ring of 0.80mm.
According to the position of prototype tunnel girth joint, shim is set in lining cutting ring model, shim uses thickness 0.5mm
Aluminium flake production, it is desirable that lining cutting ring model is fully disconnected by each shim, and entire Lining Ring is cut into 8 independent pipes
Piece model, it is identical as prototype segment that each model section of jurisdiction corresponds to central angle.Becket needs guiding through all shims, plays connection and separates
The effect of piece two sides model section of jurisdiction, shim need to punch, and punch position is completely by prototype tunnel girth joint circumferential direction bolt
Position is determined by 1/20 likelihood ratio reduced scale.It is in view of needing in model casting process that shim is fastened to each other with template simultaneously,
Play the role of positioning and erect becket, therefore shim there will be the region for template fixed clamp.Thus shim is obtained
Design scheme, long 100mm, wide 37.5mm, wherein 27.5mm is for separating lining cutting ring model in width direction, and 10mm is for solid
Clamp is held, and shim reserves the hole of 3 diameter 0.80mm, for across becket.
Lining Ring die body is poured by fine concrete, using following formula:
Ecm=SEEc (2)
Wherein:
Ecm--- lining cutting ring model fine concrete elasticity modulus,
SE--- the elasticity modulus likelihood ratio is 1/6,
Ec--- prototype tunnel modulus of elasticity of concrete is 36000MPa.
Can determine fine concrete object elastic modulus be 6012MPa, attempt configuration different ratio fine concrete, and by
Batch carries out material test, and final selected proportion is cement: sand: lime: water=1:5:0.8:1.16 fine concrete conduct
Cast material, surveying its elasticity modulus is 6210MPa.
The lining cutting ring model obtained using the design method can really reflect the structure of prototype tunnel as shown in Fig. 2-Fig. 6
Characteristic, and it is simple for production, it is at low cost, it can in high volume make.
The above-mentioned description to design example is that this can be understood and applied for the ease of those skilled in the art
Invention.Those skilled in the art obviously easily can make various modifications to these designs, and described herein general
Principle is applied in other examples without having to go through creative labor.Therefore, the present invention is not limited to example here, this fields
Technical staff's announcement according to the present invention, for the improvement made of the present invention and modification all should protection scope of the present invention it
It is interior.
Claims (9)
1. a kind of Lining Ring design methods of analog shield tunnel girth joint, which comprises the following steps:
1) according to likelihood ratio principle, lining cutting ring model internal-and external diameter and longitudinal width are determined, forms Lining Ring mold；
2) prototype tunnel girth joint is simulated with longitudinal subdivision piece, intends prototype tunnel circumferential direction bolt, design with built-in metal ring moulds
Longitudinal subdivision piece and built-in metal ring is arranged in the cross section diameter of the built-in metal ring in the Lining Ring mold, forms lining
Build ring skeleton；
3) proportion for designing fine concrete material, pours to form lining cutting ring model based on the lining cutting ring skeleton.
2. the Lining Ring design methods of analog shield tunnel girth joint according to claim 1, feature exist
In the quantity of the longitudinal subdivision piece and position are corresponding with the quantity of prototype tunnel girth joint and position.
3. the Lining Ring design methods of analog shield tunnel girth joint according to claim 1, feature exist
In the in-plane of the longitudinal subdivision piece is arranged along the width direction of lining cutting ring model.
4. the Lining Ring design methods of analog shield tunnel girth joint according to claim 1, feature exist
In the number of the built-in metal ring and the circumferential bolt number of prototype tunnel girth joint are identical.
5. the Lining Ring design methods of analog shield tunnel girth joint according to claim 1, feature exist
In the longitudinal subdivision on piece is equipped with for the through-hole across the built-in metal ring.
6. the Lining Ring design methods of analog shield tunnel girth joint according to claim 1, feature exist
In the cross section diameter of the built-in metal ring meets following formula:
Wherein: EsmFor built-in metal ring tension elasticity modulus, d is built-in metal ring cross section diameter, SEFor the elasticity modulus likelihood ratio,
SlFor geometric similarity ratio, EsFor prototype tunnel circumferential direction bolt tension elasticity modulus, D is prototype tunnel circumferential direction bolt cross section diameter.
7. the Lining Ring design methods of analog shield tunnel girth joint according to claim 1, feature exist
In the proportion of the fine concrete material makes the elasticity modulus of fine concrete material meet following formula:
Ecm=SEEc
Wherein, EcmFor the elasticity modulus of fine concrete material, SEFor the elasticity modulus likelihood ratio, EcFor prototype tunnel concrete bullet
Property modulus.
8. the Lining Ring design methods of analog shield tunnel girth joint according to claim 1, feature exist
Made in, the longitudinal subdivision piece of aluminium flake, the aluminium flake with a thickness of 0.25mm-0.75mm.
9. the Lining Ring design methods of analog shield tunnel girth joint according to claim 1, feature exist
In the built-in metal ring is using high-intensitive carbon steel wire production.
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| CN201810654816.4A CN108932902B (en) | 2018-06-22 | 2018-06-22 | Lining ring model design method capable of simulating shield tunnel circumferential joint |
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|---|---|---|---|
| CN201810654816.4A CN108932902B (en) | 2018-06-22 | 2018-06-22 | Lining ring model design method capable of simulating shield tunnel circumferential joint |
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| CN108932902A true CN108932902A (en) | 2018-12-04 |
| CN108932902B CN108932902B (en) | 2021-02-02 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109493710A (en) * | 2018-12-21 | 2019-03-19 | 同济大学 | The shield tunnel liner design methods and model of the circumferential assembled performance of analog |
| CN110293622A (en) * | 2019-07-03 | 2019-10-01 | 西南交通大学 | A kind of tunnel reinforced concrete lining cutting test model pours device and casting method |
| CN112589997A (en) * | 2020-12-10 | 2021-04-02 | 同济大学 | Design and manufacturing method of shield tunnel double-layer lining structure model |
| CN113640136A (en) * | 2021-08-12 | 2021-11-12 | 华东交通大学 | Shield segment reduced scale model experiment device and experiment method |
| CN113959750A (en) * | 2021-11-17 | 2022-01-21 | 北京市市政工程设计研究总院有限公司 | Assembled shield tunnel model lining for centrifugal model test and manufacturing method thereof |
| CN114526088A (en) * | 2022-01-25 | 2022-05-24 | 西南交通大学 | Longitudinal joint equivalent model for researching shield tunnel segment dislocation |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109493710A (en) * | 2018-12-21 | 2019-03-19 | 同济大学 | The shield tunnel liner design methods and model of the circumferential assembled performance of analog |
| CN110293622A (en) * | 2019-07-03 | 2019-10-01 | 西南交通大学 | A kind of tunnel reinforced concrete lining cutting test model pours device and casting method |
| CN112589997A (en) * | 2020-12-10 | 2021-04-02 | 同济大学 | Design and manufacturing method of shield tunnel double-layer lining structure model |
| CN112589997B (en) * | 2020-12-10 | 2021-10-29 | 同济大学 | Design and manufacturing method of shield tunnel double-layer lining structure model |
| CN113640136A (en) * | 2021-08-12 | 2021-11-12 | 华东交通大学 | Shield segment reduced scale model experiment device and experiment method |
| CN113640136B (en) * | 2021-08-12 | 2023-12-15 | 华东交通大学 | Shield segment contraction scale model experimental device and experimental method |
| CN113959750A (en) * | 2021-11-17 | 2022-01-21 | 北京市市政工程设计研究总院有限公司 | Assembled shield tunnel model lining for centrifugal model test and manufacturing method thereof |
| CN114526088A (en) * | 2022-01-25 | 2022-05-24 | 西南交通大学 | Longitudinal joint equivalent model for researching shield tunnel segment dislocation |
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