CN108086995B - A kind of shield (TBM) tunnel pipe sheet built seam test loading method - Google Patents
A kind of shield (TBM) tunnel pipe sheet built seam test loading method Download PDFInfo
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- CN108086995B CN108086995B CN201711200109.XA CN201711200109A CN108086995B CN 108086995 B CN108086995 B CN 108086995B CN 201711200109 A CN201711200109 A CN 201711200109A CN 108086995 B CN108086995 B CN 108086995B
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- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 238000011068 loading method Methods 0.000 title claims abstract description 26
- 239000004567 concrete Substances 0.000 claims abstract description 19
- 230000008676 import Effects 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 238000007796 conventional method Methods 0.000 claims description 2
- 238000011156 evaluation Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 238000011160 research Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention provides a kind of shield (TBM) tunnel pipe sheet built seams to test loading method, this method is first depending on the stress that classical will wave pattern calculates domain pipe-plate lining, then the stress characteristic for determining survey region and clear its concrete and bolt, external load when dividing three kinds of situations are counter to push away test accordingly.The present invention is directed to make the stress in experimental study region reach unanimity with the stress in its domain as far as possible, and then simplified pipe-plate lining seam is made to test the stress characteristic for accurately simulating the pipe-plate lining domain；Implementation is simple and feasible simultaneously, securely and reliably.
Description
Technical field
The present invention relates to the field of test technology more particularly to a kind of test loads of shield (TBM) tunnel pipe sheet built seam
Method.
Background technique
The shield tunnel (TBM) is due to its quick, high-quality, efficient, safe feature of constructing, in recent years gradually in China's iron
It is used widely in road, highway engineering.The liner structure of shield tunnel is mainly assembled by prefabricated pipe section, the tunnel TBM
Prefabricated pipe section lining cutting is largely used, a large amount of seam thus will be generated between pipe-plate lining, these seams are often the weakness in tunnel
There is significant impact at position to the stress and deformation of Lining Ring, and therefore, the mechanical property for studying seam seems very necessary.
Currently, being widely adopted to the research mesarcs load test of shield (TBM) tunnel pipe sheet built seam, since domain full size is former
Type test carries out that difficulty is big, at high cost, therefore the seam that two pieces of sections of jurisdiction are generally spliced by test is as research object.Examination
The loading method tested plays a crucial role entire test, existing load thinking are as follows: applies horizontal loading first to lead
Enter axle power, according to different axle power load levels, by reinforced concrete section calculation method, determines that bolt reaches corresponding to surrender
Moment, apply vertical load on this basis and import corresponding moment of flexure.
In research shield (TBM) tunnel pipe sheet built seam mechanical property test, connect with what two pieces of sections of jurisdiction were spliced
Seam is used as research object, as should make its stress consistent with domain stress that may be present as possible, above-mentioned conventional load
Method can not reach this requirement to a certain extent, not comprehensive enough and accurate to the simulation of tunnel domain stress.According to
Classical will wave pattern (see attached drawing 1), tunnel it is longitudinal by it is curved when, stress is linearly distributed along section, should generally select stress maximum
Region as research object, therefore very likely there is the state that total cross-section is pressurized or total cross-section is opened in survey region.When connecing
When stitching the compression of concrete total cross-section, pressure is mainly undertaken by concrete, and when seam is opened, pulling force is then only undertaken by bolt.
Obviously above-mentioned conventional loading method is by concrete and the common stress of bolt, and since respectively stress condition is not or not concrete and bolt
Clear, abutment joint mechanical mechanism can not do detailed analysis.It is therefore desirable to one kind can specify seam end face concrete and bolt by
Power feature, and being capable of the safe and reliable loading method simulated of more comprehensively accurate abutment joint stress.
Summary of the invention
To solve the above problems, the present invention provides a kind of shield (TBM) tunnel pipe sheet built seams to test loading method,
The stress characteristic of seam end face concrete and bolt can be specified, and more accurately simulates the stress of seam, to mention
The accuracy of height test；Implementation is simple and feasible simultaneously, securely and reliably.
In order to achieve the above objectives, load thinking of the invention is: according to the stress in classical will wave pattern analysis and research region
Feature, from three kinds of situations considerations of the actual stress of seam point, the anti-applying mode and size for pushing away load in test.This
The purpose of invention is achieved through the following technical solutions: a kind of shield (TBM) tunnel pipe sheet built seam test loading method, special
Sign the following steps are included:
(1) test section of jurisdiction pours, and shaped form section of jurisdiction is replaced with the linear type section of jurisdiction voluntarily poured, is pressed in seam endface
Actual conditions carry out moulding.
(2) section of jurisdiction poured is conserved 28 days at the standard conditions, based on classical will wave pattern according to engineering reality and examination
It tests requirement and calculates domain section of jurisdiction stress under each Load Combination acts on.
(3) survey region seam stress characteristic is determined, it is counter to push away the external load for needing to apply in test.1. if survey region is complete
Section is pressurized, then pressure, which is considered as, is all undertaken by joint concrete, regular by its distribution of the compressive stress, axle power suffered by calculating section of jurisdiction and
Moment of flexure is further scaled the vertical load for needing to apply by moment of flexure size.2. if survey region section is opened, pulling force view
All to be undertaken by bolt.At this point, ignoring the influence of moment of flexure abutment joint, the stress that domain state computation is obtained is all approximate to be turned
Turn to pulling force.3. if survey region exists simultaneously compressive region and tensile region, pressure is mainly undertaken by concrete, pulling force mainly by
Bolt undertakes.At this point, can load according to a conventional method, classification setting axle power is horizontal and calculates corresponding moment.
(4) determining loading method and load is calculated according to previous step to be further applied load as follows respectively.Especially
It is noted that the lesser branch of coefficient of friction need to be arranged when section of jurisdiction gravity is larger to generate the influence that can not ignore to test
Seat is to offset gravity.1. directly applying axle power by calculating institute's value first, then applies vertical force and import moment of flexure.2. section of jurisdiction quilt
When pulling open, only it need to directly apply axle power by evaluation.3. axle power is imported by the numerical value classification being calculated, for different axis
Power level applies vertical force and imports corresponding moment of flexure.
The test can be the linear type section of jurisdiction voluntarily poured with section of jurisdiction.
The survey region seam stress characteristic is obtained under the effect of various Load Combinations by domain pipe-plate lining.It is described outer
Load includes axle power and moment of flexure, and value is back-calculated to obtain by seam stress.
The axle power can be introduced directly into.
The moment of flexure is imported by applying vertical load.
The mechanics principle that the present invention tests loading method is:
1. the stress of domain pipe-plate lining is obtained according to classical will wave pattern under the effect of various Load Combinations, with
This determines the survey region of splicing pipe-plate lining seam test, specifies its stress characteristic.
2. mixed according to mechanics of materials formula and reinforcing bar by joint concrete end face stress distribution and the stress characteristic of bolt
Solidifying soil section calculation method is counter to push away required external load.
3. axle power can directly apply at section of jurisdiction both ends, moment of flexure is including seam by applying the big vertical loads such as two
Two vertical load intermediate regions formed simple bending section, avoid generate influence of shear force test.
Detailed description of the invention
Fig. 1 be domain pipe-plate lining by it is curved when its stress characteristic schematic diagram.
Wherein (a) is deformation pattern, (b) is will wave pattern stress envelope, and irising out part is survey region.
Fig. 2 is that shield (TBM) tunnel pipe sheet built seam of the invention tests loading method mechanics principle schematic diagram, will be drawn
State that is curved or bending is equivalent to axle power and moment of flexure collective effect.
Wherein (a) is the compression of seam total cross-section, (b) is opened for seam, (c) is to exist simultaneously tensile region and compressive region.
Fig. 3 is that shield (TBM) tunnel pipe sheet built seam of the invention tests loading principle schematic diagram.
Wherein (a) be simultaneously apply axle power and moment of flexure, (b) be only bolt tension when apply axle power.
Fig. 4 is shield (TBM) tunnel pipe sheet built seam test load schematic diagram of the invention.
Wherein (a) is test load top view, is (b) test load front view.In figure: 1 jack；2 load distribution beams；
3 movable supports；4 bolts；5 test specimens；6 transmission rods
Specific embodiment
It is further described below in conjunction with technical solution of the attached drawing to the embodiment of the present invention.
This Case Experiments On A studies mechanical property of shield (TBM) the tunnel lateral direction seam under seismic force effects, limit
The complete full scale test of interannular can not be carried out in condition, selects the full scale model test of single bolt component herein.
In general, under seismic loading, the tunnel shield (TBM) can longitudinally generate axial tension, axial compressive force with
And buckling.When tunnel is by axial drawing (pressure) power, all bolt strained features of interannular connector are identical.It tests in such cases
It is simple and clear, it is not discussed here.When the shield tunnel (TBM) is by buckling, according to the classical longitudinal bending resistance model of will wave,
The maximum position of tensile stress or compression is located at the outermost (see Fig. 1) of pipe-plate lining ring, therefore originally single bolt test model needle
This region is studied.
It is calculated and is found according to will wave pattern, when seam is by stretch bending, lateral stress is only smaller than outside by 5% in survey region, seam
It is big by 44% on the inside of the stress ratio of outside when being bent.This also further demonstrates the reasonability for ignoring moment of flexure when seam is opened.Therefore
The shield tunnel (TBM) by it is curved when, test model loading method is shown in Fig. 3
The splicing of shaped form section of jurisdiction is replaced to be tested with the linear type section of jurisdiction voluntarily poured, loading method includes following step
It is rapid:
(1) voluntarily pour single bolt linear tube sheet element, component pour after according to existing concrete curing condition and
Method (according to existing national standards " normal concrete mechanical test method ") maintenance 28 days.
(2) calculated according to early period, analysis seam end face concrete stress distribution and it is bolt strained, what abutment joint was likely to occur
Three kinds of stress characteristics separately design test.
(3) axle power and moment of flexure that need to be imported according to mechanics of materials formula and the determination of reinforced concrete section calculation method.
1. survey region total cross-section is pressurized, Fig. 2 (a), required axle power N=X are shown in concrete stress distribution in end face2A1, curved
Square M=X1WZHere A1For test specimen seam face area, WZFor module of anti-bending section.
2. survey region section is opened, concrete cross-section face stress distribution approximation such as Fig. 2 (b) near end face, but connect
When seam is opened, concrete is obviously not subject to pulling force, and whole pulling force are undertaken by bolt, and Moment is ignored at this time, is only applied
Add axle power N=X2A2, A here2For single bolt tension influence area, i.e. domain cross-sectional area is than bolt number.
3. axle power is closed according to maximum axle power level (see Fig. 2 (c)) when survey region exists simultaneously compressive region and tensile region
Reason classification, for the corresponding moment of flexure of each axle power level calculation, is successively further applied load by the sequence of moment of flexure after first axle power.
(4) it is tested according to aforementioned loading method and the load being calculated load.Actual loaded schematic diagram is shown in
Fig. 4
It should be appreciated that the ordinary skill of this field is without creativeness the present invention provides a kind of loading method of initiative
Labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art are according to this
The design of invention passes through analysis ratiocination or the available technical solution of limited test on the basis of existing technology, all should be
In the protection scope being defined in the patent claims.
Claims (7)
1. a kind of shield/TBM tunnel pipe sheet built seam tests loading method, feature the following steps are included:
(1) test section of jurisdiction pours, and shaped form section of jurisdiction is replaced with the linear type section of jurisdiction voluntarily poured, in seam endface by practical
Situation carries out moulding；
(2) section of jurisdiction poured is conserved 28 days at the standard conditions, is wanted based on classical will wave pattern according to engineering reality and test
It asks and calculates domain pipe-plate lining stress under each Load Combination acts on；
(3) survey region seam stress characteristic is determined, it is counter to push away the external load for needing to apply in test；1. if survey region total cross-section
It is pressurized, then pressure, which is considered as, is all undertaken by joint concrete, by its distribution of the compressive stress rule, calculates axle power and moment of flexure suffered by section of jurisdiction
Moment of flexure is further scaled the vertical load for needing to apply by size；2. pulling force is considered as entirely if survey region section is opened
Portion is undertaken by bolt；At this point, ignoring the influence of moment of flexure abutment joint, convert the stress whole approximation that domain state computation obtains to
Pulling force；3. pressure is mainly undertaken by concrete, and pulling force is mainly by bolt if survey region exists simultaneously compressive region and tensile region
It undertakes；At this point, can load according to a conventional method, classification setting axle power is horizontal and calculates corresponding moment；
(4) determining loading method and load is calculated according to previous step to be further applied load as follows respectively；Pay special attention to
, when section of jurisdiction gravity it is larger may to test generate can not ignore influence when, need to be arranged the lesser support of coefficient of friction with
Offset gravity；1. directly applying axle power by calculating institute's value first, then applies vertical force and import moment of flexure；2. section of jurisdiction is opened
When, only it need to directly apply axle power by evaluation；3. axle power is imported by the numerical value classification being calculated, for different axle power water
The flat vertical force that applies imports corresponding moment of flexure.
2. shield according to claim 1/TBM tunnel pipe sheet built seam tests loading method, which is characterized in that step
(3) in, determining survey region stress is consistent with stress characteristic in its domain, and counter pushes away required external load with this.
3. shield according to claim 1/TBM tunnel pipe sheet built seam tests loading method, which is characterized in that step
(3) in, according to the stress characteristic of seam stress clear end face concrete and bolt.
4. shield according to claim 1/TBM tunnel pipe sheet built seam tests loading method, which is characterized in that step
(3) in, required external load is pushed away using mechanics of materials formula and reinforced concrete section calculation method are counter.
5. shield according to claim 1/TBM tunnel pipe sheet built seam tests loading method, which is characterized in that step
(4) in, axle power is introduced directly by jack.
6. shield according to claim 1/TBM tunnel pipe sheet built seam tests loading method, which is characterized in that step
(4) in, moment of flexure applies vertical load by jack and imports.
7. shield according to claim 1/TBM tunnel pipe sheet built seam tests loading method, which is characterized in that step
(4) in, when gravity be can not ignore, to eliminate its influence, support is set using coefficient of friction small material in seam lower part, so
After import axle power.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711200109.XA CN108086995B (en) | 2017-11-27 | 2017-11-27 | A kind of shield (TBM) tunnel pipe sheet built seam test loading method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711200109.XA CN108086995B (en) | 2017-11-27 | 2017-11-27 | A kind of shield (TBM) tunnel pipe sheet built seam test loading method |
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| CN108086995A CN108086995A (en) | 2018-05-29 |
| CN108086995B true CN108086995B (en) | 2019-04-26 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459224B (en) * | 2018-12-18 | 2023-09-05 | 国家电网有限公司 | Loop-to-loop joint test device considering transverse performance of shield tunnel and installation method |
| CN110230516B (en) * | 2019-07-23 | 2021-03-26 | 中铁第四勘察设计院集团有限公司 | Non-pre-embedded monitoring method for longitudinal internal force of shield tunnel |
| CN111236970B (en) * | 2020-01-08 | 2021-06-11 | 中铁第四勘察设计院集团有限公司 | Shield segment and crack control method thereof |
| CN111259556B (en) * | 2020-01-20 | 2022-06-07 | 西南交通大学 | Safety evaluation method based on shield tunnel segment joint opening amount |
| CN114707382B (en) * | 2022-04-07 | 2024-02-13 | 合肥工业大学 | Bending stiffness calculation method for segment joint containing elastic liner |
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| JP2007051433A (en) * | 2005-08-16 | 2007-03-01 | Kajima Corp | Sealing structure between segments and sealing method for segment |
| CN101299008A (en) * | 2008-06-13 | 2008-11-05 | 同济大学 | Trial model capable of simulating shield tunnel pipe slice joint and manufacturing method thereof |
| CN104533470A (en) * | 2014-11-03 | 2015-04-22 | 同济大学 | Standing type mechanical loading device for three-ring prototype irregular shield segment |
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2017
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|---|---|---|---|---|
| JP2007051433A (en) * | 2005-08-16 | 2007-03-01 | Kajima Corp | Sealing structure between segments and sealing method for segment |
| CN101299008A (en) * | 2008-06-13 | 2008-11-05 | 同济大学 | Trial model capable of simulating shield tunnel pipe slice joint and manufacturing method thereof |
| CN104533470A (en) * | 2014-11-03 | 2015-04-22 | 同济大学 | Standing type mechanical loading device for three-ring prototype irregular shield segment |
| CN106096211A (en) * | 2016-07-08 | 2016-11-09 | 山东大学 | A kind of underground engineering confined concrete support system method for designing |
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