CN208537543U - Tunnel-liner model and the experimental rig for simulating tunnel longitudinal effect - Google Patents
Tunnel-liner model and the experimental rig for simulating tunnel longitudinal effect Download PDFInfo
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- CN208537543U CN208537543U CN201820968502.7U CN201820968502U CN208537543U CN 208537543 U CN208537543 U CN 208537543U CN 201820968502 U CN201820968502 U CN 201820968502U CN 208537543 U CN208537543 U CN 208537543U
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Abstract
The utility model relates to tunnel-liner model and the experimental rigs of simulation tunnel longitudinal effect, the tunnel-liner model includes preliminary bracing and secondary lining, secondary lining is longitudinally divided at least two secondary lining segments, annulus rubber cincture and clamp connection of the two neighboring secondary lining segment by T-type；Preliminary bracing is rolled by pvc soft board, and preliminary bracing joint is overlapped and bonded using tongue and groove.The utility model is by the segmented design of secondary lining, it is attached between segment using T-type endless belt and clip, both the intersegmental connection of secondary lining and effect of contraction can guarantee, the power transmission mechanism between secondary lining segment in deformation joint can be simulated again, preferably time of day of the simulation tunnel structure in Practical Project, the preferably mechanical characteristic and deformation characteristic of reflection tunnel structure in the longitudinal direction, reliable basic data is provided for the resisting longitudinal deformation setting of actual tunnel, guarantee tunnel long-term stability and safety, to preferably guarantee the security of the lives and property and economy.
Description
Technical field
The utility model relates to Tunnel Engineering experimental technique field more particularly to a kind of tunnel-liner model and including being somebody's turn to do
The experimental rig of the simulation tunnel longitudinal effect of tunnel-liner model.
Background technique
With the rapid development of the national economy, especially Transportation Infrastructure Construction development there is an urgent need to major long tunnels
More and more, the Geological Environment Engineering that tunnel is passed through also becomes increasingly complex, and major long tunnel is as speciality linear structure, longitudinal direction
Rigidity is smaller, more sensitive for the variation of external loads, due to load around the inhomogeneities of lower sleeping clay distribution, tunnel
Variation, train load and the soil body the factors such as consolidation rheology under the influence of, during tunnel run for a long time, the longitudinal direction in tunnel sinks
The problem of dropping especially longitudinal differential settlement gradually shows especially, and linear deformation is very unfavorable to tunnel structure, when tunnel existed
When the deflection or longitudinal curvature of amount reach a certain amount value, it will lead to Tunnel destruction or secondary lining deformation
Seam opens excessive and leak is caused to leak mud；When tunnel longitudinal direction differential settlement amount is excessive, it will cause track to generate longitudinal inclined
Difference and difference of height, influence comfortableness and security when train operation.When the longitudinal bias of track and difference of height are above standard,
Increased wear between railway roadbed cracking, track and wheel causes daily maintenance and maintenance task to aggravate, and causes huge economic damage
It loses.Therefore longitudinal inhomogeneous deformation that tunnel generates is problem very important in Tunnel Engineering.
On the one hand secondary liner structure is considered as a homogeneous entirety by traditional indoor model test in the longitudinal direction, be thought of as
Plane strain problems, although secondary lining has on the other hand been carried out segment processing, secondary lining is segmented between back segment and section
The rigid connection poured using analog material can not accurately and effectively embody tunnel stiffness variation in the longitudinal direction and deformation joint
The intermal force of adjacent secondary lining segment, under short tunnel or tunnel crouch soil layer uniformly it is hard in the case where model test,
Longitudinal rigidity change caused by deformation joint is smaller on linear deformation and longitudinal inhomogeneous deformation influence, this method has certain adapt to
Property, and it is uneven for major long tunnel, subjacent bed when, linear deformation and longitudinal inhomogeneous deformation sensibility are strong, tradition
Method can not then simulate the mechanical characteristic and deformation characteristic of liner structure in the longitudinal direction.
Utility model content
The utility model is intended to provide tunnel-liner model and simulates the experimental rig of tunnel longitudinal effect, which can be more
Time of day of the good simulation tunnel structure in Practical Project, the preferably mechanical characteristic of reflection tunnel structure in the longitudinal direction
And deformation characteristic.
In order to achieve the above objectives, the technical solution adopted in the utility model is as follows:
Tunnel-liner model, including preliminary bracing and secondary lining, the secondary lining are longitudinally divided at least two 2 times
Lining cutting segment, two neighboring secondary lining segment is by annular band connection.
Further, the cross sectional shape of endless belt be T-type, the web of endless belt be located at two neighboring secondary lining segment it
Between, the edge of a wing of endless belt wraps two neighboring secondary lining segment.
Preferably, the edge of a wing of endless belt is bound round on a secondary lining segment wherein respectively by two clips.
Wherein, there is packing material between preliminary bracing and secondary lining.
Wherein, endless belt material is rubber.
Further, secondary lining segment is that major ingredient mixing pours by gypsum, diatomite.
Further, the material of preliminary bracing is pvc.
Preferably, preliminary bracing is rolled by pvc soft board, and preliminary bracing joint is overlapped and bonded using tongue and groove.
The experimental rig for simulating tunnel longitudinal effect further includes model test other than including above-mentioned tunnel-liner model
The Vertical loading device of case and multiple matrix arrangements, model test box top opening, on the opposite both side plate of model test box point
Not She You a tunnel portal, the both ends of the tunnel-liner model are individually positioned on one of tunnel portal, model examination
The soil body is filled in tryoff.
Further, the bottom of Vertical loading device is equipped with pressing plate.
Compared with prior art, the utility model has the following beneficial effects:
1, secondary liner structure is divided into secondary lining under different segment and actual conditions and become because being arranged by the utility model
The case where shape seam segmentation, is consistent, meanwhile, be also convenient for test operation, between secondary lining segment and segment using T-type endless belt and
Clip is attached, and endless belt and clip both can guarantee the intersegmental connection of secondary lining and effect of contraction, meanwhile, and can be with mould
In the power transmission mechanism of deformation joint between quasi- secondary lining segment, to more accurately truly simulate tunnel lining structure segment
The nonlinear change of junction rigidity in practical projects is more in line with the mechanics row of tunnel deformation joint junction in Practical Project
For that can be provided for the design, construction and maintenance of Tunnel Engineering accurate, reliable so that its experimental test data is more acurrate, reliable
Test basis；
2, pvc soft boards have certain flexibility, after being rolled into required preliminary bracing, moreover it is possible to keep certain rigid
Degree, the characteristics of can not only simulating its globality, but also flexible support can be simulated, the true mechanics feature for reflecting preliminary bracing.
Detailed description of the invention
Fig. 1 is the schematic diagram in tunnel-liner model cross section in the utility model；
Fig. 2 is the schematic diagram of tunnel-liner model vertical section in the utility model；
Fig. 3 is the schematic diagram of tunnel-liner model segment junction in the utility model；
Fig. 4 is the enlarged drawing in Fig. 3 at A；
Fig. 5 is the schematic diagram in preliminary bracing cross section in the utility model；
Fig. 6 is the front view of experimental provision in the utility model；
Fig. 7 is the side view of experimental provision in the utility model；
Fig. 8 is the top view of experimental provision in the utility model；
In figure: 1- preliminary bracing, 2- secondary lining segment, the endless belt 3-, 4- clip, 5- packing material, 6- model test
Case, 7- Vertical loading device, 8- tunnel portal, 9- pressing plate.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing, to this reality
It is further elaborated with novel.
As shown in Figs 1-4, tunnel-liner model disclosed by the utility model, including preliminary bracing 1 and secondary lining, it is secondary
Lining cutting is longitudinally divided at least two secondary lining segments 2, and two neighboring secondary lining segment 2 is connected by endless belt 3, endless belt 3
It can be bound round by clip 4 and be also fixed on secondary lining segment 2 by other fixation devices on secondary lining segment 2.By secondary lining
Structure is divided into different segments with secondary lining under actual conditions because the case where setting deformation joint is segmented is consistent.
The cross sectional shape of endless belt 3 is T-type, and the web of endless belt 3 is between two neighboring secondary lining segment 2, ring
The edge of a wing of shape band 3 wraps two neighboring secondary lining segment 2.Wherein one is bound round respectively by two clips 4 in the edge of a wing of endless belt 3
On a secondary lining segment 2.Specifically, T-shaped rubber fastening band is selected to use as endless belt 3, T-shaped rubber fastening band is set
Nesting is carried out between adjacent secondary lining segment 2, and the both wings of T-type rubber fastening band is made to wrap adjacent secondary lining segment 2
End, around the winding of one wing tip of waterstop, then banding is fixed on one of secondary lining segment 2 to a belt-type clip 4
On, its banding is fixed on another secondary lining segment 2 after another wing tip winding of T-type rubber fastening band by another clip 4
On.It is attached between secondary lining segment and segment using T-type endless belt and clip, endless belt and clip both can guarantee secondary lining
Intersegmental connection and effect of contraction are built, meanwhile, and the power transmission mechanism between secondary lining segment in deformation joint can be simulated, from
And the nonlinear change of tunnel lining structure segment junction rigidity in practical projects is truly accurately more simulated, more
Meet the mechanical behavior of tunnel deformation joint junction in Practical Project.
It is major ingredient by gypsum, diatomite, by the mechanical characteristic of required lining cutting, compares between the material determined according to similarity criterion
Example relationship configuration mixing, which is poured, builds up the secondary lining segment 2 for meeting geometric similarity condition.Wherein, preliminary bracing 1 and secondary lining
Between have a packing material 5, packing material 5 uses gypsum, for filling the gap between preliminary bracing 1 and secondary lining 2.
As shown in figure 5, preliminary bracing 1 is rolled by pvc soft board in present embodiment, 1 joint of preliminary bracing is used
Tongue and groove is overlapped and is bonded.Meet the first of geometric similarity condition specifically, being rolled into using the customized similar pvc soft board of elasticity modulus
The splicing of the preliminary bracing 1 of phase supporting length and form of fracture, pvc soft board is overlapped using tongue and groove after polishing, blend compounds water bonding
Mode.The lap-joint of preliminary bracing 1 is located at inverted arch, and stitching portion polishing is with a thickness of the 1/2 of pvc soft board thickness, and polish length S
It is the 1/5 of 1 inverted arch arc length of preliminary bracing, overlaps soft board after polishing is good, is then bonded using glue or viscous glutinous agent.
Pvc soft board has certain flexibility, after being rolled into required preliminary bracing, moreover it is possible to certain rigidity is kept, it both can be with
The characteristics of simulating its globality, and flexible support can be simulated, the true mechanics feature for reflecting preliminary bracing.
As shown in Fig. 6,7,8, the experimental rig of simulation tunnel longitudinal effect disclosed by the utility model, in addition to including above-mentioned
It further include the Vertical loading device 7 of model test box 6 and multiple matrix arrangements outside tunnel-liner model, Vertical loading device 7
Bottom is equipped with pressing plate 9, and pressing plate 9 is plank.6 top opening of model test box, left plate, square of the model test box 6 by rectangle
Shape right side plate, the front side board of rectangle, rectangle back side panel, rectangle bottom plate composition, wherein left plate and right side plate are equipped with Tunnel
Mouth 8.The both ends of tunnel-liner model are individually positioned on one of tunnel portal 8, are filled with the soil body in model test box 6.
The production method of above-mentioned tunnel-liner model makes preliminary bracing 1 and multiple secondary lining segments 2, with endless belt 3
Secondary lining segment 2 is connected into composition secondary lining.Preliminary bracing is simulated using customized pvc soft board in present embodiment
1, the pouring structures such as gypsum, diatomite simulate secondary lining segment 2, and the intersegmental change of Tunnel Second Lining is simulated in endless belt 3
Shape seam connection, preliminary bracing 1, secondary lining segment 2, endless belt 3 analog material the test specimen of different mixture ratio be made pressing
The test of elasticity modulus is done on power machine, to meet the similar of structure modulus of elasticity.Specifically include step:
Step 1 is rolled into the preliminary bracing 1 of corresponding length and form of fracture using customized pvc soft board, in the spelling of soft board
The place of connecing polishes to soft board, then tongue and groove overlap joint blend compounds water or viscous glutinous agent bonding；
Step 2, gypsum, diatomite etc. mix the secondary lining segment 2 for pouring corresponding section and length in specific proportions；
Step 3, T-type rubber fastening band needed for customized production are used as endless belt 3, splice secondary lining segment 2,
T-type rubber fastening band is placed between secondary lining adjacent segment and carries out nesting, and adjacent lining cutting segment is fixed in using clip 4
On to connect adjacent secondary lining segment 2.
Step 4: filler plaster in the gap between supporting in the early stage 1 and secondary lining makes preliminary bracing and secondary lining
It is closely connected.
In above-mentioned steps three, T-type rubber fastening band can accordingly change it just according to tunnel-liner segment junction rigidity
Degree, with specific reference to tunnel-liner segment junction geometric similarity than with elasticity modulus likelihood ratio selection T-type rubber fastening band
Rigidity, selection method are as follows:
Firstly, calculating separately out prototype tunnel longitudinally upper lining cutting segment bending stiffness (EcIc)p, extensional rigidity (EcAc)pWith
Bending stiffness (the E of jointing between segmenttIt)p, extensional rigidity (EtAt)pRatio (αij)p, the upper lining cutting section in model tunnel longitudinal direction
Section bending stiffness (EcIc)m, extensional rigidity (EcAc)mBending stiffness (the E of jointing between segmenttIt)m, extensional rigidity
(EtAt)mRatio (αij)m, (α can be obtained by the theory of similarityij)p=(αij)m=αij, wherein j=1 indicates bending resistance, and j=2 indicates anti-
It draws.
Then, the joint elastic modulus E of model is calculated by formula (1) and formula (2)tmWith the joint elastic mould of prototype
Measure Etp；
In formula (1) and formula (2), EcFor the elasticity modulus of lining cutting, EtFor the elasticity modulus of connector, IcFor the moment of inertia of lining cutting,
ItFor the moment of inertia of connector, AcFor the area of section of lining cutting, AtFor the area of section of connector.
By formula (3) the computational geometry likelihood ratio:
In formula (3), LtpFor the joint dimension of prototype, LtmFor the joint dimension of model, CLtFor the geometric similarity of joint
Than.
The elasticity modulus likelihood ratio is calculated by formula (4):
In formula (4), CEtFor the elasticity modulus likelihood ratio of joint；EtmFor the joint elastic modulus of model, EtpFor prototype
Joint elastic modulus.
By Equivalent Calculation as a result, quantitative control is carried out to the rigidity of endless belt, to simulate lining cutting segment in deformation joint
Coupling stiffness under different situations both can obtain junction in the mechanical behavior of different external conditions and broken annular by testing
State can also be obtained under the conditions of corresponding coupling stiffness, mechanics of the entire tunnel structure under different external conditions by test
Behavior and damage -form facilitate the connection of research connector and external environment to the linear deformation of tunnel structure and the shadow of stress
It rings.
The method for carrying out indoor model test using above-mentioned tunnel-liner model, includes the following steps；
Tunnel-liner model is put into model test box 6 by step 1, and the both ends of tunnel-liner model are individually positioned in
On one of tunnel portal 8, backfill and densification into model test box 6；
Step 2 applies vertical load to the soil body in model test box 6 to simulate additional load.Utilize multiple matrix cloth
The Vertical loading device 7 set carries out Vertical loading, and the Action of Vertical Loads that wherein Vertical loading device 7 applies is in specific dimensions
Pressing plate 9 on, then pass to ground layer soil body, to reach the similar effect of load；
Step 3, in loading procedure, the test data of foil gauge and soil pressure cell on synchronous recording tunnel model.Foil gauge
And the setting of soil pressure cell is the ordinary skill in the art, details are not described herein again.
The utility model can preferably simulate time of day of the tunnel structure in Practical Project, preferably reflect tunnel
The mechanical characteristic and deformation characteristic of structure in the longitudinal direction probe into influence of the lateral performance to longitudinal performance, disclose environment, load etc.
Internal and external factor provides reliable basic number to the Influencing Mechanism of tunnel bulk settling for the resisting longitudinal deformation setting of actual tunnel
According to guarantee tunnel long-term stability and safety, to preferably guarantee the security of the lives and property and economy.
Certainly, the utility model can also have other numerous embodiments, without departing substantially from the spirit of the present invention and its essence
In the case where, those skilled in the art can make various corresponding changes and modifications, but these according to the utility model
Corresponding changes and modifications all should belong to the protection scope of the utility model the attached claims.
Claims (10)
1. a kind of tunnel-liner model, it is characterised in that: including preliminary bracing (1) and secondary lining, the secondary lining is longitudinal
It is divided at least two secondary lining segments (2), two neighboring secondary lining segment (2) is connected by endless belt (3).
2. tunnel-liner model according to claim 1, it is characterised in that: the cross sectional shape of endless belt (3) is T-type, ring
For the web of shape band (3) between two neighboring secondary lining segment (2), the edge of a wing of endless belt (3) wraps two neighboring two
Secondary lining cutting segment (2).
3. tunnel-liner model according to claim 2, it is characterised in that: the edge of a wing of endless belt (3) is by two clips (4)
It is bound round on a secondary lining segment (2) wherein respectively.
4. tunnel-liner model according to claim 1,2 or 3, it is characterised in that: endless belt (3) material is rubber.
5. tunnel-liner model according to claim 2 or 3, it is characterised in that: between preliminary bracing (1) and secondary lining
There are packing material (5).
6. tunnel-liner model according to claim 1, it is characterised in that: secondary lining segment (2) are by gypsum, diatomite
It is poured for major ingredient mixing.
7. tunnel-liner model according to claim 1 or 6, it is characterised in that: the material of preliminary bracing (1) is pvc.
8. tunnel-liner model according to claim 7, it is characterised in that: preliminary bracing (1) rolled by pvc soft board and
At preliminary bracing (1) joint is overlapped and bonded using tongue and groove.
9. including the experimental provision of tunnel-liner model described in any one of claim 1-8 claim, it is characterised in that:
It further include the Vertical loading device (7) of model test box (6) and multiple matrix arrangements, model test box (6) top opening, model
A tunnel portal (8) is respectively equipped on the opposite both side plate of chamber (6), the both ends of the tunnel-liner model are placed respectively
Wherein on a tunnel portal (8), the soil body is filled in model test box (6).
10. experimental provision according to claim 9, it is characterised in that: the bottom of Vertical loading device (7) is equipped with pressing plate
(9)。
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| CN201820968502.7U CN208537543U (en) | 2018-06-22 | 2018-06-22 | Tunnel-liner model and the experimental rig for simulating tunnel longitudinal effect |
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| CN201820968502.7U CN208537543U (en) | 2018-06-22 | 2018-06-22 | Tunnel-liner model and the experimental rig for simulating tunnel longitudinal effect |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593892A (en) * | 2018-06-22 | 2018-09-28 | 西南交通大学 | Tunnel-liner model, the experimental rig and experimental method for simulating tunnel longitudinal effect |
| CN113311107A (en) * | 2021-05-06 | 2021-08-27 | 四川公路桥梁建设集团有限公司 | Test device and method for simulating excavation of super-large section variable cross-section urban tunnel |
-
2018
- 2018-06-22 CN CN201820968502.7U patent/CN208537543U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593892A (en) * | 2018-06-22 | 2018-09-28 | 西南交通大学 | Tunnel-liner model, the experimental rig and experimental method for simulating tunnel longitudinal effect |
| CN113311107A (en) * | 2021-05-06 | 2021-08-27 | 四川公路桥梁建设集团有限公司 | Test device and method for simulating excavation of super-large section variable cross-section urban tunnel |
| CN113311107B (en) * | 2021-05-06 | 2023-11-14 | 四川公路桥梁建设集团有限公司 | Test device and method for simulating ultra-large section variable cross section urban tunnel excavation |
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