CN208330399U - A kind of stratum interface segment shield tunnel segment lining structure - Google Patents
A kind of stratum interface segment shield tunnel segment lining structure Download PDFInfo
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- CN208330399U CN208330399U CN201821018103.0U CN201821018103U CN208330399U CN 208330399 U CN208330399 U CN 208330399U CN 201821018103 U CN201821018103 U CN 201821018103U CN 208330399 U CN208330399 U CN 208330399U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model discloses a kind of stratum interface segment shield tunnel segment lining structure, it includes interface segment to the structure, and the two sides of interface segment are conventional pipeline section；The landing edge bolt rigidity of adjacent tubes piece interannular is greater than the landing edge bolt rigidity of conventional pipeline section on the interface segment.The utility model can effectively solve the problem that the problem of shield tunnel segment lining structure linear deformation of soft or hard stratum interface segment in the prior art is excessive, non-homogeneous stress is concentrated, interannular landing edge destroys.
Description
Technical field
The utility model relates to Tunnel Engineering fields, and in particular to a kind of stratum interface segment shield tunnel segment lining knot
Structure.
Background technique
Shield tunnel is the flexible structure for connecting section of jurisdiction ring upwardly through interannular connector in vertical disconnected side, tunnel by
Firm hard formation is easy to make tunnel to soft stratum transition section since the subsidence of bottom layer degree of consolidation of different nature has differences
Biggish longitudinal differential settlement occurs for road.
Concrete pipe sheet occurs to squeeze between each other under the effect of different size of sedimentation and deformation, reverse, and leads to section of jurisdiction office
The problems such as portion's stress is excessive, corner fragmentation, interannular generate faulting of slab ends and open deformation.Now some studies pointed out that tunnel Longitudinal Settlement radiuses
R is smaller, and interannular faulting of slab ends amount is bigger, and when radius is less than 1000m, circumferential weld joint open is excessive causes measures of preventing water to fail, and causes tunnel
Leakage problem.
In addition, railway roadbed is easily partially broken away from section of jurisdiction when faulting of slab ends deforms more than feasible value, the resonance that subway circulation causes
Effect can accelerate railway roadbed to destroy, and cause great threat to traffic safety, and section of jurisdiction interannular caused by longitudinal differential settlement opens
The pulling force and shearing force that deformation easily bears interannular landing edge bolt increased dramatically, when stress level is more than bolt material
Connector buckling failure can occur after ultimate strength.Therefore, shield tunnel longitudinal direction cannot be ignored in shield tunnel is studied and applied
At formation characteristics mutation locating for uneven subsidence, especially tunnel.
Shield tunnel aiming at the problem that soft or hard stratum interface segment is also easy to produce differential settlement, existing counter-measure and side
Method can be classified as three classes: first is that stratum consolidation treatment measures are taken, using sleeve valve barrel grouting reinforcement technique to hole week such as out of tunnel
Soft stratum is handled, and settlement after construction is reduced；Second is that taking lining cutting rigidity strengthening measure, it is included in section of jurisdiction inner wall and adds transverse and longitudinal
Steel skeleton support etc., improves overall stiffness；Linear deformation measure is adapted to third is that taking the initiative, such as every in pipe of concrete loop
A compound section of jurisdiction of ring steel plate is laid every a distance, increases the longitudinal flexibility in running tunnel part.
But there are still obvious deficiencies for existing solution: one, stratum consolidation need to accurately control grouting pressure, grout coordinate ratio and
The parameters such as slurries consumption avoid the occurrence of water burst, gush sand accident, and difficulty of construction is higher；Two, increasing support frame in section of jurisdiction can occupy
Certain inside headroom, it may occur however that Metro Clearance problem not up to standard, and unevenly answered caused by linear deformation after rigidity enhancing
Power can not be released effectively, and easily concrete pipe sheet be made crack occur；Three, in stratum intersection section of jurisdiction interannular track bolt easily because of rigidity
Insufficient and destroy, one ring steel pipe sheet of local setting does not solve this fundamental issue.
Utility model content
The utility model is directed to the above-mentioned deficiency of the prior art, provides one kind and is able to solve soft or hard stratum in the prior art
The shield tunnel segment lining structure linear deformation of interface segment is excessive, non-homogeneous stress is concentrated, interannular landing edge destroys
The problem of stratum interface segment shield tunnel segment lining structure.
In order to solve the above technical problems, the utility model uses following technical proposal:
Provide a kind of stratum interface segment shield tunnel segment lining structure comprising the two sides of interface segment, interface segment are
Conventional pipeline section；The landing edge bolt rigidity of adjacent tubes piece interannular is rigid greater than the landing edge bolt of conventional pipeline section on interface segment
Degree.
In above-mentioned technical proposal, it is preferred that the quantity of the landing edge bolt of adjacent tubes piece interannular is greater than normal on interface segment
Regulate the landing edge bolt quantity of section.
In above-mentioned technical proposal, it is preferred that the longitudinal cross-section face of the landing edge bolt of adjacent tubes piece interannular on interface segment
Product is greater than the longitudinal cross-section area of the landing edge bolt of conventional pipeline section.
In above-mentioned technical proposal, it is preferred that interface segment section of jurisdiction is steel pipe sheet, and the routine pipeline section is concrete pipe sheet.
The main beneficial effect of above-mentioned stratum interface segment shield tunnel segment lining structure provided by the utility model is:
By that will be interface segment with the shield tunnel segment lining structure setting of soft or hard stratum interface segment, and by adjusting friendship
The quantity of the landing edge bolt of adjacent tubes piece interannular on area under a person's administration, effectively improves section of jurisdiction landing edge rigidity, to reduce section of jurisdiction
Landing edge deformation, track bolt failure damage when avoiding generating longitudinal differential settlement improve tunnel structure safety.
By setting steel pipe sheet for the section of jurisdiction of interface segment, in order to which section of jurisdiction and joint stiffness is adjusted flexibly, improves section of jurisdiction
Flexibility avoids existing concrete section of jurisdiction rigidity larger, and non-homogeneous stress caused by tunnel linear deformation can not be released effectively, and easily goes out
Existing crackle crack, and concrete pipe sheet increase longitudinal bolt quantity can cause partial reinforcement concentration problem.Simultaneously by conventional pipeline section
Section of jurisdiction be set as concrete pipe sheet, save cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of stratum interface segment shield tunnel segment lining structure.
Wherein, 1, interface segment, 11, landing edge bolt, 2, conventional pipeline section.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
As shown in Figure 1, it is the structural schematic diagram of stratum interface segment shield tunnel segment lining structure.
The stratum interface segment shield tunnel segment lining structure of the utility model includes interface segment 1, the boundary of liner structure
Section 1 is located at soft or hard stratum interface, and the two sides of interface segment 1 are conventional pipeline section 2, and conventional pipeline section 2 is respectively arranged in soft or hard stratum.
The rigidity of the landing edge bolt 11 of adjacent tubes piece interannular is greater than the rigidity on conventional pipeline section 2 on interface segment 1；It is optional
, the quantity and longitudinal cross-section area of the landing edge bolt 11 of adjacent tubes piece interannular are greater than on conventional pipeline section 2 on interface segment 1
Quantity and longitudinal cross-section area, to improve the rigidity of section of jurisdiction landing edge on interface segment 1, to reduce section of jurisdiction landing edge change
Shape, track bolt failure damage when avoiding generating longitudinal differential settlement improve tunnel structure safety.
1 section of jurisdiction of interface segment is steel pipe sheet, and the section of jurisdiction of conventional pipeline section is concrete pipe sheet.By the way that the section of jurisdiction of interface segment 1 is set
Be set to steel pipe sheet, section of jurisdiction and joint stiffness, to improve section of jurisdiction flexible in order to being adjusted flexibly, avoid existing concrete section of jurisdiction rigidity compared with
Greatly, non-homogeneous stress caused by tunnel linear deformation can not be released effectively, easy cracked crack, and concrete pipe sheet increase is vertical
It can cause partial reinforcement concentration problem to 11 quantity of track bolt.Concrete pipe sheet is set by the section of jurisdiction of conventional pipeline section 2 simultaneously,
Save cost.
Here is the explanation of the design method of above-mentioned stratum interface segment shield tunnel segment lining structure comprising following step
It is rapid:
S1, shield tunnel longitudinal direction finite element numerical computation model is established using software for calculation ANSYS, and by the tunnel in model
Road lining segment parameter is set as concrete pipe sheet, calculates the Longitudinal Settlement amount h that stratum interface segment generates by modeliAnd it is longitudinal
Deformation curve radius R.
Further, the method for establishing tunnel Vertical Numerical computation model is to be modeled using software for calculation ANSYS.
Pass through three dimensional internal shell unit simulation concrete section of jurisdiction, compression bar unit simulation different soil, three-dimensional pin hinge list
Member simulates circumferential track bolt, and drawbar unit simulates longitudinal tensile joint bolt, and compression bar simulates longitudinal resistance to compression track bolt.
Taking ex1, prxz1, dens1, d1 is respectively elasticity modulus, Poisson's ratio, density and the thickness of concrete pipe sheet；This is several
The value of a parameter is that the concrete strength in conjunction with used in concrete engineering section of jurisdiction and section of jurisdiction size are selected, Elastic Modulus Values ginseng
It is provided according to " Code for design of concrete structures ", concrete pipe sheet thickness is set according to concrete engineering section of jurisdiction thickness.
R1, r2, r3 are respectively the shearing of girth joint bolt, tension and compression, rotational stiffness；The shearing of girth joint bolt and tension and compression are rigid
Degree takes a safety value here, that is, is set as a very big value, and such as 3 × 1012Pa；Rotational stiffness is carried out according to engineering analog method
Value.
A, ex2, ex3 be respectively landing edge bolt area of section, longitudinal tensile joint bolt material elasticity modulus and
Longitudinal resistance to compression track bolt elasticity modulus of materials；Longitudinal tension, resistance to compression track bolt area of section are identical, are A；Girth joint
Bolt is overlapped with longitudinal resistance to compression track bolt position, and quantity is disposed as m, substantially the same part.
When section of jurisdiction is concrete pipe sheet, longitudinal resistance to compression track bolt elasticity modulus is modulus of elasticity of concrete ex1 and ring
Between resistance to compression bolt quantity m ratio；When section of jurisdiction be steel pipe sheet when, resistance to compression bolt elasticity modulus be steel pipe sheet elasticity modulus ex4 with
The ratio of interannular resistance to compression bolt quantity m.Longitudinal tensile joint bolt elasticity modulus is bolt material elasticity modulus, and value is according to spiral shell
Elasticity modulus corresponding to bolt steel type.
Ex4, ex5 be respectively soft, hard formation elasticity modulus, and value reports the ground provided referring to concrete engineering geological mapping
Stiffness layer；Taking section of jurisdiction number of rings is n.
Further, analogue unit is substituted into after above-mentioned setting value being distinguished value, numerical solution is carried out, thus obtains soft or hard
Stratum interface segment tunnel Longitudinal Settlement amount hi, wherein i is the serial number of section of jurisdiction ring, i=1~n；Each settling amount is connected and is fitted
To tunnel Longitudinal Settlement curve, thus obtain using tunnel linear deformation radius R in the case of concrete pipe sheet.
Further, it takes that i is boundary segment limit inner tube piece number of rings, B is section of jurisdiction breadth, then calculates the generation of stratum interface segment
Longitudinal Settlement amount hiAnd the method for linear deformation sweep R are as follows:
S2, when the target set point of linear deformation sweep be Rs when, bring into model, and calculate the length of interface segment
L。
To further decrease section of jurisdiction ring faulting of slab ends amount, therefore the requirement of the Vertical Curve radius Rs met according to the design needs,
It substitutes into formula (1), fixed other values are constant, and then adjust the value of i, by section of jurisdiction number of rings i, due to the length L of interface segment
For the fixation multiple of i, multiplying power is section of jurisdiction breadth, and section of jurisdiction breadth is fixed value, therefore the length L of interface segment can be obtained, wherein
Rs>R。
S3, the tunnel lining segment parameter setting in model is replaced with into steel pipe sheet, brought into model, calculated stratum and have a common boundary
The Longitudinal Settlement amount h ' that section generatesiAnd linear deformation sweep R '.
Further, the concrete pipe sheet of interface segment is replaced with into steel pipe sheet, i.e., steel pipe sheet is simulated by three-dimensional shell unit,
Taking ex6, prxz2, dens2, d2 is respectively steel pipe sheet elasticity modulus, Poisson's ratio, density and thickness；Wherein, steel pipe sheet springform
According to different steel types by selection of tabling look-up, steel pipe sheet thickness is set amount according to concrete engineering section of jurisdiction thickness.
The Longitudinal Settlement amount h ' of stratum interface segment generation is calculatediAnd the specific calculating side of linear deformation sweep R '
The same S2 of method.
S4, landing edge the bolt quantity m or Bolt sizes A for increasing interface segment, to improve interannular track bolt rigidity.
Further to control inhomogeneous deformation, by increasing interannular track bolt quantity m, interannular bolt effective cross-section is improved
Product A, to improve the tension and compression rigidity of interannular track bolt.
S5, the steel type for adjusting interface segment steel pipe sheet, the elasticity modulus ex6 of the steel pipe sheet after being adjusted.
By adjusting the type of steel, thus it is possible to vary its elasticity modulus ex6 value, and then to the bending stiffness of steel pipe sheet into
Row adjustment.The corresponding elasticity modulus ex6 value of steel is as shown in table 1.
Table 1
S6, S4 and S5 landing edge bolt quantity m adjusted, Bolt sizes A and steel pipe sheet elasticity modulus ex6 are brought into
Longitudinal Settlement amount h " in model, after being adjustediAnd linear deformation sweep R ".
S7, by linear deformation sweep R " adjusted compared with target set point Rs, as R " when < Re, repeat step
S4 to S6, as R " carries out intensity inspection to the interannular longitudinal bolt of interface segment and calculates when >=Rs.
S8, when the parameter of selection make intensity inspection calculate it is invalid when, step S4 to S7 is repeated, when the parameter of selection examines intensity
It is counted as immediately, design finishes.
Further, it includes calculating the shear stress inspection of interannular longitudinal bolt that intensity inspection, which is calculated,.
Taking τ is that interannular longitudinal bolt main cross section calculates shear stress, fvIt is for the shearing strength design value of bolt steel, then longitudinal
The method that the shear stress inspection of bolt is calculated are as follows:
Wherein, fvBy the corresponding permission tensile strength of interannular longitudinal bolt steel type, the material table by looking into steel is obtained
It arrives.
Test and adjustment are calculated by carrying out intensity inspection repeatedly to section of jurisdiction ring and interannular longitudinal bolt, is further ensured
The good transition effect of the lining segment of soft or hard stratum interface segment, to realize the faulting of slab ends amount that reduces, make linear deformation homogenization, mention
The purpose of high tunnel vertical line ride comfort, and obtain one kind and use steel pipe sheet transitional structure type in soft or hard stratum interface segment
Formula.
Specific embodiment of the present utility model is described above, in order to facilitate understanding by those skilled in the art
The utility model, it should be apparent that the utility model is not limited to the range of specific embodiment, to the common skill of the art
For art personnel, if various change the attached claims limit and determine the utility model spirit and scope in,
These variations are it will be apparent that all are created using the utility model of the utility model design in the column of protection.
Claims (4)
1. a kind of stratum interface segment shield tunnel segment lining structure, which is characterized in that including interface segment, the two sides of interface segment are
Conventional pipeline section；The landing edge bolt rigidity of adjacent tubes piece interannular is greater than the landing edge bolt of conventional pipeline section on the interface segment
Rigidity.
2. interface segment shield tunnel segment lining structure in stratum according to claim 1, which is characterized in that the interface segment
The quantity of the landing edge bolt of upper adjacent tubes piece interannular is greater than the landing edge bolt quantity of conventional pipeline section.
3. interface segment shield tunnel segment lining structure in stratum according to claim 1, which is characterized in that the interface segment
The longitudinal direction that the longitudinal cross-section area of the landing edge bolt of upper adjacent tubes piece interannular is greater than the landing edge bolt of conventional pipeline section is cut
Face area.
4. interface segment shield tunnel segment lining structure in stratum according to claim 1, which is characterized in that the interface segment
Section of jurisdiction is steel pipe sheet, and the section of jurisdiction of the routine pipeline section is concrete pipe sheet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821018103.0U CN208330399U (en) | 2018-06-29 | 2018-06-29 | A kind of stratum interface segment shield tunnel segment lining structure |
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| CN201821018103.0U CN208330399U (en) | 2018-06-29 | 2018-06-29 | A kind of stratum interface segment shield tunnel segment lining structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108571328A (en) * | 2018-06-29 | 2018-09-25 | 西南交通大学 | A kind of stratum interface segment shield tunnel segment lining structure and design method |
| CN110688696A (en) * | 2019-09-16 | 2020-01-14 | 中铁第五勘察设计院集团有限公司 | Parameter determination method and device for tunnel supporting structure |
-
2018
- 2018-06-29 CN CN201821018103.0U patent/CN208330399U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108571328A (en) * | 2018-06-29 | 2018-09-25 | 西南交通大学 | A kind of stratum interface segment shield tunnel segment lining structure and design method |
| CN108571328B (en) * | 2018-06-29 | 2023-08-04 | 西南交通大学 | Stratum juncture shield tunnel segment lining structure and design method |
| CN110688696A (en) * | 2019-09-16 | 2020-01-14 | 中铁第五勘察设计院集团有限公司 | Parameter determination method and device for tunnel supporting structure |
| CN110688696B (en) * | 2019-09-16 | 2023-08-15 | 中铁第五勘察设计院集团有限公司 | Method and device for determining parameters of tunnel supporting structure |
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