CN205422740U - Horizontal tunnel model test device in cavity behind simulation lining wall - Google Patents
Horizontal tunnel model test device in cavity behind simulation lining wall Download PDFInfo
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- CN205422740U CN205422740U CN201620207095.9U CN201620207095U CN205422740U CN 205422740 U CN205422740 U CN 205422740U CN 201620207095 U CN201620207095 U CN 201620207095U CN 205422740 U CN205422740 U CN 205422740U
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Abstract
The utility model relates to a horizontal tunnel model test device in cavity behind simulation lining wall, the device be side -mounting center piece in tunnel lining, fillet behind tunnel lining outside installation wall, the fillet adopts the piecemeal pin -connected panel behind its mesospore, and prelude, afterbody and the top of each piecemeal are equipped with tenon, tongue -and -groove, protruding point respectively to each piecemeal is conveniently fixed a position, is installed and removed, through removing center piece with simulation tunnel excavation, remove behind the wall cavity after with the simulation wall of a plurality of piecemeals in the fillet through the part. The utility model discloses an installation with remove center piece, realized the process of the test of excavation behind the first loading, more accord with mountain tunnel's engineering characteristics, through the installation with remove a plurality of piecemeals in the fillet behind the wall, can go on portably simulating effectively to cavity behind the wall of different how much characteristics (like different positions, equidimension not), especially in duplicate test, avoided building again country rock and local loaded down with trivial details work of excavating the country rock.
Description
Technical field
This utility model relates to a kind of simulating the horizontal tunnel model test device in cavity after lining wall, belongs to technical field of civil engineering.
Background technology
Use the mountain tunnel of New Austrian Tunneling Method construction, backbreak due to country rock do not backfill, the reason such as casting and compacting of concrete leakiness, generally there is lining cutting and contact the defect phenomenon that leakiness is even locally come to nothing with country rock.These shapes, position, different sizes wall after cavity disease, easily cause liner structure stress concentrate, crack progressing, even cause the severe safety accident being partially stripped block.The most many scholars are by means such as on-the-spot test, numerical simulation and model tests, and after existence tax is deposited wall, under the conditions of cavity, the mechanical characteristic of liner structure expands careful research.
Owing to model test has, boundary condition is clear and definite, respond advantages such as measuring directly perceived, lining cutting and country rock analog material controlled properties, it has also become study and solve a kind of important means of Tunnel Engineering problem.In general, the kind of domestic and international Tunnel Engineering model test apparatus and pattern are relatively horn of plenties: in terms of model modes of emplacement, including horizontal and vertical two big classes；In terms of model stress dimension, load including two dimension (plane strain) and three-dimensional loading two big classes；In terms of model load mode, load gentle (liquid) capsule including jack and load two big classes；In terms of counter-force presentation mode, including frame-type and foundation ditch type；In terms of excavation loading sequence, load two big classes afterwards including first loading to excavate afterwards and first excavate.
On above-mentioned model test apparatus platform, (or being locally filled with flexible material) is excavated in the country rock local of specific location after lining wall, can be achieved with the mechanical characteristic of liner structure under the conditions of cavity after the simulation of cavity disease, and then research wall after lining wall.But owing to after wall, the geometric properties in cavity is complicated, to the cavity impact on liner structure stress characteristic after careful research diverse location, different size of wall, then need constantly to repeat above-mentioned test.And based on existing model test apparatus, be required for again pouring country rock (the most again pouring), and (or being locally filled with flexible material) is excavated in the country rock of specific location local, this is undoubtedly time-consuming a, job arduously, costly.
Utility model content
Not enough in order to solve present in above-mentioned existing assay device, the purpose of this utility model is to provide a kind of and simulates the horizontal tunnel model test device in cavity after lining wall.
To achieve these goals, the technical solution adopted in the utility model is: a kind of simulate the horizontal tunnel model test device in cavity after lining wall, it includes central block, tunnel-liner has been poured outside described central block, the outer profile size of described central block is equal sized with the Internal periphery of tunnel-liner, filler rod after the wall of tunnel-liner outline is installed outside described tunnel-liner, after described wall, filler rod is made up of the splicing that joins end to end of multi-disc piecemeal, country rock has been poured outside filler rod after described wall, described country rock surrounding side pours four corresponding counter-force piers respectively, it is mounted on jack between inside each counter-force pier and outside country rock.
In further preferred version, described piecemeal be respectively arranged at two ends with tenon and tongue-and-groove.
In further preferred version, the top of described piecemeal is conformed with a little.
In further preferred version, the material of described central block is hard wood.
In further preferred version, the material of described tunnel-liner is Gypsum Fibrosum or foamed concrete.
In further preferred version, after described wall, the material of filler rod is timber, lucite or aluminium block.
In further preferred version, the analog material of described country rock uses blanc fixe, Iron concentrate, Extra-fine sand to be aggregate, and Gypsum Fibrosum powder is adjuvant, and Colophonium and alcoholic solution are cementing agent.
Compared with prior art, this utility model advantage is: by installing and removing central block, it is achieved that first load the process of the test excavated afterwards, more meet the engineering characteristic of mountain tunnel；By the some piecemeals installed and remove after wall in filler rod, cavity after the wall of different geometric properties (such as diverse location, different size) can be carried out simple and effective simulation, especially in repeating test, it is to avoid again pour country rock and the tedious work of country rock is excavated in local.
Accompanying drawing explanation
Fig. 1 is the structural representation before horizontal tunnel model test device excavation.
Fig. 2 is the piecemeal assembly schematic diagram of filler rod after wall.
Fig. 3 is the structural representation after horizontal tunnel model test device excavation.
Labelling in figure: 1-central block, 2-tunnel-liner, filler rod after 3-wall, 31-piecemeal, 32-tenon, 33-tongue-and-groove, 34-protruding point, 4-country rock, 5-jack, 6-counter-force pier.
Detailed description of the invention
In order to allow features described above of the present utility model and advantage become apparent, special embodiment below, and coordinate accompanying drawing, it is described in detail below.
As shown in Fig. 1 ~ 3, a kind of simulate the horizontal tunnel model test device in cavity after lining wall, it includes central block 1, tunnel-liner 2 has been poured outside described central block 1, the outer profile size of described central block 1 is equal sized with the Internal periphery of tunnel-liner 2, filler rod 3 after the wall of tunnel-liner 2 outline is installed outside described tunnel-liner 2, after described wall, filler rod 3 is made up of multi-disc piecemeal 31 splicing that joins end to end, country rock 4 has been poured outside filler rod 3 after described wall, described country rock 4 surrounding side pours four corresponding counter-force piers 6 respectively, it is mounted on jack 5 between inside each counter-force pier 6 and outside country rock 4.
In order to ensure to be accurately positioned and install, be respectively arranged at two ends with tenon 32 and the tongue-and-groove 33, the such as stem of piecemeal 31 of described piecemeal 31 are provided with tenon 32, and afterbody is provided with tongue-and-groove 33.Installing or remove piecemeal 31 for convenience, the top of described piecemeal 31 is conformed with a little 34.
Making for convenience, the material of described central block 1 is hard wood.The material of described tunnel-liner 2 is Gypsum Fibrosum or foamed concrete.After described wall, the material of filler rod 3 is timber, lucite or aluminium block.The analog material of described country rock 4 uses blanc fixe, Iron concentrate, Extra-fine sand to be aggregate, and Gypsum Fibrosum powder is adjuvant, and Colophonium and alcoholic solution are cementing agent.
As shown in Fig. 1 ~ 3, a kind of simulate the horizontal tunnel model test method in cavity after lining wall, comprise the following steps:
(1) similarity relation of horizontal tunnel model test is determined: be considered as the engineering characteristic of the tunnel prototype of object of study, consider experimental technique condition simultaneously, selected geometric similarity ratio and stress similitude ratio, and then determine physical dimension and the similarity relation of each physical quantity of tunnel-liner 2 in horizontal tunnel model test；
(2) pouring tunnel-liner 2: make central block 1, its outer profile size keeps consistent with the tunnel-liner 2 Internal periphery size of design；With central block 1 for interior mould, coordinate with interim external mold (figure is not drawn into), poured-in-place tunnel-liner 2 on horizontal loading test platform；The material of tunnel-liner 2 uses predetermined analog material, and its physical dimension and each physical quantity should meet the requirement of similarity relation；
(3) filler rod 3 after assembly wall: after tunnel-liner 2 hardened forming, slough interim external mold, filler rod 3 after assembly wall outside it；After wall, filler rod 3 uses piecemeal 31 pin-connected panel, stem, afterbody and the top of each piecemeal 31 to be correspondingly provided with tenon 32, tongue-and-groove 33 and protruding point 34 respectively, to facilitate location, to install and remove each piecemeal 31；
(4) pour country rock 4: after filler rod 3 installs after wall, outside it, pour country rock 4, to form horizontal tunnel model；The material of country rock 4 uses predetermined analog material, and its each physical quantity should meet the requirement of similarity relation；
(5) being loaded onto initial stress state: on horizontal loading test platform, utilize jack 5 and counter-force pier 6 that horizontal tunnel model is applied confined pressure, its payload values should meet the requirement of similarity relation, to simulate initial stress state；Measure the initial reading of each monitoring point (being not drawn in figure)；
(6) simulation tunnel excavates and cavity after wall: while keeping applying confined pressure, first removes central block 1 and excavates with simulation tunnel, and the reading measuring each monitoring point changes；Some piecemeals 31 that local removes after wall in filler rod 3 again, with cavity after simulation wall, measure the reading change of each monitoring point, compose with quantitative study and deposit the mechanical characteristic of tunnel-liner 2 structure under the conditions of cavity；
(7) carry out repeating test: unload confined pressure, the central block 1 being removed and some piecemeals 31 are reinstalled go back to corresponding position, then repeats step (5) and step (6)；In repeating process of the test, adjust empty position and size after wall, with the mechanical characteristic of tunnel-liner 2 structure under the conditions of quantitative study difference cavity.
In step (1), by selected geometric similarity ratio, and then thickness and the outer profile size of tunnel-liner 2 are determined；By selected stress similitude ratio, and then determine the bullet mould likelihood ratio of tunnel-liner 2 material, the density likelihood ratio, strength similarity ratio and the area load likelihood ratio.With the unidirectional two lane vural roads tunnel of 4 buried sections of IV level country rock as prototype, consider experimental technique condition simultaneously, first select geometric similarity and compare SL=1/10, then the thickness of tunnel-liner 2 is 4cm, and its outer profile size is that 98cm(is high) * 122cm(width), Internal periphery a size of 90cm(is high) and * 114cm(width).Then select stress similitude and compare Ss=1/10, then the likelihood ratio of other physical quantitys all can be derived by said two devices, i.e. bullet mould likelihood ratio S of materialE=1/10, density likelihood ratio Sr=1, strength similarity compares Sc=1/10, area load likelihood ratio Sq=1/10。
In step (2), hard wood can be used to be processed into central block 1；Gypsum Fibrosum or foamed concrete can be used to pour tunnel-liner 2, and it plays the physics value such as mould, density should meet the requirement of similarity relation；Simultaneously should on Nei Mo and external mold brushing lubricant, to facilitate the later stage demoulding.
In step (3), timber, lucite or aluminium block can be used to make the piecemeal 31 of filler rod 3 after wall, it plays the physics value such as mould, density and should try one's best and keep consistent with country rock 4；The present embodiment use 32 piecemeals 31 to join end to end splicing composition wall along the outline of tunnel-liner 2 after filler rod 3.
In step (4), the analog material of country rock 4 can use blanc fixe, Iron concentrate, Extra-fine sand to be aggregate, and Gypsum Fibrosum powder is adjuvant, and Colophonium and alcoholic solution are cementing agent, it plays the physics value such as mould, density should meet the requirement of similarity relation, such as the present embodiment m by mass percentageBlanc fixe: mIron concentrate: mExtra-fine sand: mGypsum Fibrosum powder: mColophonium: mEthanolThe proportional arrangement of=0.606:0.152:0.189:0.02:0.033:0.1 forms.
In step (6), the present embodiment removes 2, upper right side piecemeal 31, with empty after simulating the wall at the right haunch of lining cutting.
This utility model is not limited to above-mentioned preferred forms, anyone horizontal tunnel model test device empty after can drawing other various forms of simulation lining walls under enlightenment of the present utility model.All impartial changes done according to this utility model claim and modification, all should belong to covering scope of the present utility model.
Claims (6)
1. simulate the horizontal tunnel model test device in cavity after lining wall for one kind, it is characterized in that: include central block, tunnel-liner has been poured outside described central block, the outer profile size of described central block is equal sized with the Internal periphery of tunnel-liner, filler rod after the wall of tunnel-liner outline is installed outside described tunnel-liner, after described wall, filler rod is made up of the splicing that joins end to end of multi-disc piecemeal, country rock has been poured outside filler rod after described wall, described country rock surrounding side pours four corresponding counter-force piers respectively, it is mounted on jack between inside each counter-force pier and outside country rock.
After simulation lining wall the most according to claim 1 cavity horizontal tunnel model test device, it is characterised in that: described piecemeal be respectively arranged at two ends with tenon and tongue-and-groove.
The horizontal tunnel model test device in cavity after simulation lining wall the most according to claim 2, it is characterised in that: the top of described piecemeal is conformed with a little.
The horizontal tunnel model test device in cavity after simulation lining wall the most according to claim 1, it is characterised in that: the material of described central block is hard wood.
The horizontal tunnel model test device in cavity after simulation lining wall the most according to claim 1, it is characterised in that: the material of described tunnel-liner is Gypsum Fibrosum or foamed concrete.
The horizontal tunnel model test device in cavity after simulation lining wall the most according to claim 1, it is characterised in that: after described wall, the material of filler rod is timber, lucite or aluminium block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620207095.9U CN205422740U (en) | 2016-03-17 | 2016-03-17 | Horizontal tunnel model test device in cavity behind simulation lining wall |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620207095.9U CN205422740U (en) | 2016-03-17 | 2016-03-17 | Horizontal tunnel model test device in cavity behind simulation lining wall |
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| CN205422740U true CN205422740U (en) | 2016-08-03 |
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| CN201620207095.9U Expired - Fee Related CN205422740U (en) | 2016-03-17 | 2016-03-17 | Horizontal tunnel model test device in cavity behind simulation lining wall |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673049A (en) * | 2016-03-17 | 2016-06-15 | 福州大学 | Device and method for model test of horizontal tunnel by simulating lining wall back cavity |
| CN110554166A (en) * | 2019-08-29 | 2019-12-10 | 山东大学 | Multipurpose tunnel detection model test device and method |
| CN111577318A (en) * | 2020-04-17 | 2020-08-25 | 中国海洋大学 | Tunnel long-distance excavation supporting construction device suitable for model test |
-
2016
- 2016-03-17 CN CN201620207095.9U patent/CN205422740U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673049A (en) * | 2016-03-17 | 2016-06-15 | 福州大学 | Device and method for model test of horizontal tunnel by simulating lining wall back cavity |
| CN105673049B (en) * | 2016-03-17 | 2017-09-15 | 福州大学 | Empty horizontal tunnel model test device and method after a kind of simulation lining wall |
| CN110554166A (en) * | 2019-08-29 | 2019-12-10 | 山东大学 | Multipurpose tunnel detection model test device and method |
| CN110554166B (en) * | 2019-08-29 | 2021-06-18 | 山东大学 | Multipurpose tunnel detection model test device and method |
| CN111577318A (en) * | 2020-04-17 | 2020-08-25 | 中国海洋大学 | Tunnel long-distance excavation supporting construction device suitable for model test |
| CN111577318B (en) * | 2020-04-17 | 2021-02-26 | 中国海洋大学 | Tunnel long-distance excavation supporting construction device suitable for model test |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20200317 |