CN110348117B - Steel pipe sheet negative ring structure and optimal design method thereof - Google Patents
Steel pipe sheet negative ring structure and optimal design method thereof Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 91
- 239000010959 steel Substances 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000013461 design Methods 0.000 title claims abstract description 14
- 239000002689 soil Substances 0.000 claims abstract description 20
- 238000005457 optimization Methods 0.000 claims abstract description 16
- 238000009826 distribution Methods 0.000 claims abstract description 6
- 238000004458 analytical method Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 5
- 238000011160 research Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 239000004567 concrete Substances 0.000 claims description 4
- 230000004323 axial length Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a steel pipe piece negative ring structure and an optimal design thereof, and relates to the technical field of steel pipe piece negative rings. According to the negative ring structure of the steel pipe sheet and the optimal design thereof, after soil pressure is applied to the steel pipe sheets at different optimal positions, the stress condition of the circumferential bolt group is changed between 11 MPa and 15MPa, so that the occurrence of the damage condition of bolts can be avoided, the structural stress distribution, the displacement and the deformation condition of the steel pipe sheet can be simulated and analyzed by using commercial three-dimensional software and Abaqus simulation software, the structural layout of the steel pipe sheet is optimized, the purposes of more rationalizing the structure, ensuring the safety requirement and the like are achieved, the design optimization is carried out by taking the principle of safety priority and practicality and economy into consideration, and the process of processing, manufacturing, carrying, setting up, safe use and the like of the pipe sheet is facilitated.
Description
Technical Field
The invention relates to the technical field of steel pipe piece negative rings, in particular to a steel pipe piece negative ring structure and an optimal design method thereof.
Background
The bridge type shield method (hereinafter referred to as a shield method) is a relatively advanced top culvert construction method, on the basis of keeping the traditional top culvert construction and bridge structure road side prefabrication technology, the structure top support method is greatly improved, open-cut slotting is changed into underground shield support, the influence of construction on driving is reduced by underground excavation pushing, the shield consists of six parts of a steel column, a steel beam, a shield shell, a sub-shield, a hydraulic propulsion system and an auxiliary mechanism, the shield is assembled at the front end of a first section frame bridge, the shield is used as a shield with a tunneling face and a roadbed during soil jacking, meanwhile, pushing guiding is carried out, the shield length is designed according to different geological conditions to ensure that the natural support function of central soil is the key of the bridge type shield method, the transverse section of the shield is in a simple support bridge shape, the outline size is basically the same as that of the bridge type bridge, the large section soil body (central soil) which is subject to excavation delay in the bridge span keeps a slope ratio of 1:0.75 from the shield to the moment before the shield enters the soil, the excavation is delayed by a distance from the shield face to the earth, the shield face is offset of the hydraulic propulsion system is reduced by the hydraulic thrust system, the shield system is used for reducing the driving face and the driving face is a common driving face, and the hydraulic thrust system is used for reducing the driving face and reducing the driving face is used for controlling the driving face. The stability of the excavation face is enhanced, and the traction friction reducing plate disperses the upper friction force. And the center soil body of the front part of the bottom plate is removed along the slope before the rigid bridge is pushed, and when the shield parent body is synchronously pushed along with the rigid bridge, the original pushing part of the sub shield is blocked by the soil body of the tunneling surface and moves relatively to the sub-structure box body, and the sub shield is sleeved in the box, so that the tunneling working cycle of the sub shield is completed.
In the shield method construction process of the track traffic communication channel, a steel pipe sheet ring is required to be added in a tunnel excavated by the shield machine construction, the steel pipe sheet ring is used as a supporting structure of a machine body and a tunnel soil body, the requirement of recycling can be met, the structural layout on the existing steel pipe sheet negative ring is complex, the stability is poor, meanwhile, certain economic cost is increased, the problems of practicability and economy cannot be simultaneously considered, and the practicability of the steel pipe sheet negative ring is greatly reduced.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a steel pipe piece negative ring structure and an optimal design method thereof, and solves the problems that the structural layout of the existing steel pipe piece negative ring is complex and the practicality and the economy cannot be simultaneously considered.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a steel-pipe piece burden ring structure, includes steel-pipe piece burden ring, the steel-pipe piece burden ring includes the steel-pipe piece, the quantity of steel-pipe piece is five, the inner wall fixedly connected with floor of steel-pipe piece burden ring.
The invention also discloses an optimization design method of the steel pipe piece negative ring structure, which specifically comprises the following steps:
s1, the size of a negative ring structure model of an existing steel pipe sheet and related data: the channel single-ring pipe piece consists of five steel pipe pieces with hollow structures and a ring wedge-shaped top sealing block, different pipe pieces are connected through bolts, a ring direction and a certain number of radial rib plates are arranged in each steel pipe piece, the jack support parts are arranged between the inner ring and the outer ring, in order to simplify the model, in the model, the soil pressure born by the outer surface of the steel pipe piece in a simulated working environment is 0.3MPa, the soil pressure is uniformly applied to the outer surface of the pipe piece, meanwhile, the axial thrust of about 300t of the jack acts on one end of the pipe piece in the form of 11 cylinders, the calculation is carried out by adopting a general module and an analysis module in finite element software, the time course is 0.1s, the automatic stability is set, the general contact unit contact mode is adopted on the contact surfaces of different pipe pieces, the attribute definition of a penalty function with the tangential friction coefficient of 0.28 is matched with the actual contact mode and attribute, the soil pressure born by 0.3MPa in the simulated working environment is calculated, and the distribution forces of 4.281MPa and 3.827MPa are respectively and uniformly applied on the upper surface and the lower surface;
s2, specific optimization content of the steel pipe piece negative ring structure: in the model structure in S1, the thickness of the front end face steel plate and the rear end face steel plate is reduced from 20mm to 16mm, the thickness of the inner ring steel plate is reduced from 30mm to 16mm, part of the radial rib plates and the middle annular rib plates are removed by removing the annular rib plates and part of the longitudinal rib plates under the condition of considering jack support, the contact stress condition of the end parts is adjusted, the square materials of the front side surface and the rear side surface of the non-jack support part are properly cut off, and in order to further confirm the optimization scheme, research and analysis are carried out on a general module specially used in finite element software so as to verify the rationality of the optimization scheme.
Preferably, two opposite sides of the steel pipe sheet are fixedly connected through bolts.
Preferably, the steel pipe sheet is also called a special lining ring steel pipe sheet, is mainly used for subway communication channels, is matched and combined with concrete segments, has inner and outer diameters of 2650mm and 3150mm respectively, and has an axial length of 550mm.
Preferably, the steel plate in S2 is a steel product obtained by casting with molten steel, cooling and pressing.
Preferably, the finite element software in S2 is Abaqus, and the universal module is buckle.
Preferably, the finite element software in S1 is Abaqus, and the universal module is Static, and the analysis module is General.
Preferably, the study analysis in S2 uses a 4-order buckling analysis method.
(III) beneficial effects
The invention provides a steel pipe piece negative ring structure and an optimal design method thereof. The beneficial effects are as follows: the invention also discloses an optimization design method of the steel pipe piece negative ring structure, which comprises the following steps: s1, the concrete optimization contents of the prior steel pipe sheet negative ring structure model size and related data, S2 and the steel pipe sheet negative ring structure can realize that the plate thicknesses of an inner ring and a front end plate and a rear end plate are respectively reduced to 10mm from 30mm and 16mm, the maximum Mises stress on the inner ring and the front end plate is reduced to 90.13MPa from the original 115.1MPa, and the maximum Mises stress on the structure is changed to 93.36MPa by optimizing the arrangement and the quantity of the rib plates, so that the optimization effect is still obvious, the value is still within the safety range of engineering use for Q235 steel, the corresponding rib plates serving as supporting structures cannot be used as bearing structures, so that engineering materials at the position can be properly optimized and removed, and the purpose of light use is achieved, after soil pressure is applied to the steel pipe sheets at different optimized positions, the stress condition of the circumferential bolt group is changed between 11 MPa and 15MPa, so that the occurrence of the damage condition of the bolts can be avoided, the structural stress distribution, the displacement and the deformation condition of the steel pipe sheets are simulated and analyzed by using commercial three-dimensional software and Abaqus simulation software, and then the structural layout of the steel pipe sheets is optimized, so that the purposes of more rationalizing the structure, ensuring the safety requirement and the like are achieved, the whole structural optimization is designed and optimized based on the principle of safety priority and practicability and economy, and the smooth process of processing, manufacturing, carrying, setting up, safe use and the like of the pipe sheets is facilitated.
Drawings
FIG. 1 is a perspective view of the structure of the present invention;
FIG. 2 is a cross-sectional view of the structure of the present invention;
fig. 3 is a flow chart of the present invention.
In the figure: 1-steel pipe piece negative ring, 11-steel pipe piece, 12-floor.
Examples
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, the embodiment of the invention provides a technical scheme: the utility model provides a steel-pipe piece burden ring structure, includes steel-pipe piece burden ring 1, and steel-pipe piece burden ring 1 includes steel-pipe piece 11, and the quantity of steel-pipe piece 11 is five, and the inner wall fixedly connected with floor 12 of steel-pipe piece burden ring 1, for increasing the rigidity of board, to increase some trabeculae in one side of board, the reinforced concrete slab of pouring after the reinforcement like this is called floor 12.
The invention also discloses an optimization design method of the steel pipe piece negative ring structure, which reduces the plate thickness of the inner ring and the front and rear end plates from 30mm and 16mm to 10mm, reduces the maximum Mises stress from 115.1MPa to 90.13MPa, and optimizes the arrangement and the quantity of the rib plates 12, so that the maximum Mises stress on the structure becomes 93.36MPa, the optimization effect is still obvious, the value is still within the safety range of engineering use for Q235 steel, the corresponding rib plates 12 serving as supporting structures cannot effectively play the role of the bearing structures, so that the engineering materials at the position can be properly optimized and removed, and the purpose of light use is achieved, after soil pressure is applied to the steel pipe sheet 11 at different optimized positions, the stress condition of the circumferential bolt group is changed between 11 MPa and 15MPa, so that the occurrence of the damage condition of the bolts can be avoided, the structural stress distribution, the displacement and the deformation condition of the steel pipe sheet 11 are simulated and analyzed by using commercial three-dimensional software and Abaqus simulation software, the structural layout of the steel pipe sheet 11 is optimized, the purposes of more rationalizing the structure, ensuring the safety requirement and the like are achieved, the design optimization is carried out by the principle of taking the safety into consideration and the economical efficiency into consideration, and the processing, the manufacturing, the carrying, the setting, the safe use and the like of the pipe sheet are facilitated, and the method specifically comprises the following steps:
s1, the size of a negative ring structure model of an existing steel pipe sheet and related data: the channel single-ring pipe piece consists of five steel pipe pieces with hollow structures and a ring wedge-shaped top sealing block, different pipe pieces are connected through bolts, a ring direction and a certain number of radial rib plates are arranged in each steel pipe piece, the jack support parts are arranged between the inner ring and the outer ring, in order to simplify the model, in the model, the soil pressure born by the outer surface of the steel pipe piece in a simulated working environment is 0.3MPa, the soil pressure is uniformly applied to the outer surface of the pipe piece, meanwhile, the axial thrust of about 300t of the jack acts on one end of the pipe piece in the form of 11 cylinders, the calculation is carried out by adopting a general module and an analysis module in finite element software, the time course is 0.1s, the automatic stability is set, the general contact unit contact mode is adopted on the contact surfaces of different pipe pieces, the attribute definition of a penalty function with the tangential friction coefficient of 0.28 is matched with the actual contact mode and attribute, the soil pressure born by 0.3MPa in the simulated working environment is calculated, and the distribution forces of 4.281MPa and 3.827MPa are respectively and uniformly applied on the upper surface and the lower surface;
s2, specific optimization content of the steel pipe piece negative ring structure: in the model structure in S1, the thickness of the front end face steel plate and the rear end face steel plate is reduced from 20mm to 16mm, the thickness of the inner ring steel plate is reduced from 30mm to 16mm, part of the radial rib plates and the middle annular rib plates are removed by removing the annular rib plates and part of the longitudinal rib plates under the condition of considering jack support, the contact stress condition of the end parts is adjusted, the square materials of the front side surface and the rear side surface of the non-jack support part are properly cut off, and in order to further confirm the optimization scheme, research and analysis are carried out on a general module specially used in finite element software so as to verify the rationality of the optimization scheme.
In the present invention, two opposite sides of the steel pipe sheet 11 are fixedly connected by bolts.
In the invention, the steel pipe sheet 11 is also called a special lining ring steel pipe sheet, the steel pipe sheet 11 is mainly used for subway communication channels, and is mostly matched and combined with concrete segments, the inner diameter and the outer diameter of the steel pipe sheet 11 are 2650mm and 3150mm respectively, and the axial length is 550mm.
In the invention, the steel plate in S2 is a steel product which is formed by pouring molten steel, cooling and pressing.
In the invention, the finite element software in S2 adopts Abaqus, and the universal module is a buckle.
In the present invention, the finite element software in S1 is Abaqus, the General module is Static, the analysis module is General, and Abaqus is a powerful set of engineering simulation finite element software, which solves the problem ranging from relatively simple linear analysis to many complex nonlinear problems, and Abaqus comprises a rich library of units capable of simulating any geometric shape.
In the invention, the research analysis in S2 adopts a 4-order buckling analysis mode.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a steel-pipe piece negative ring structure optimal design method, steel-pipe piece negative ring structure includes steel-pipe piece negative ring (1), steel-pipe piece negative ring (1) includes steel-pipe piece (11), the quantity of steel-pipe piece (11) is five, the inner wall fixedly connected with floor (12) of steel-pipe piece negative ring (1), its characterized in that: the method for optimally designing the negative ring structure of the steel pipe sheet specifically comprises the following steps: s1, determining the size of a negative ring structure model of a steel pipe sheet and related data: the negative ring (1) of the steel pipe sheet consists of five steel pipe sheets with hollow structures and a ring wedge-shaped jacking block, different steel pipe sheets are connected through bolts, a ring direction and a certain number of radial rib plates are arranged in each steel pipe sheet, jack supporting parts are arranged between the inner ring and the outer ring, in order to simplify the model, in the model, the soil pressure born by the outer surface of the steel pipe sheet in a simulated working environment is 0.3MPa, the soil pressure is uniformly applied to the outer surface of the pipe sheet, meanwhile, the axial thrust of a jack 300t acts on one end of the pipe sheet in the form of 11 oil cylinders, the calculation is carried out by adopting a general module and an analysis module in finite element software, the time course is 0.1s, automatic stability is set, the contact mode of a general contact unit is adopted on the contact surface of different pipe sheets, the penalty function of which the tangential friction coefficient is 0.28 is defined so as to fit the actual contact mode and attribute, the condition of the outer surface of the steel pipe sheet in the working environment is simulated, the soil pressure born by 0.3MPa, and the distribution forces of 4.281MPa and 3.827MPa are respectively applied uniformly on the upper surface and the lower surface; s2, specific optimization content of the steel pipe piece negative ring structure: in the model structure in S1, the thickness of the front end face steel plate and the rear end face steel plate is reduced from 20mm to 16mm, meanwhile, the thickness of the inner ring steel plate is also reduced from 30mm to 16mm, partial radial rib plates and middle annular rib plates are removed under the condition of taking jack support into consideration, the condition of end contact stress is adjusted, square materials of non-jack support parts on the front side surface and the rear side surface are properly cut off, and in order to further confirm the optimal design method, research and analysis are carried out on a general module specially used in finite element software, and a 4-order buckling analysis mode is adopted in the research and analysis so as to verify the rationality of an optimal scheme.
2. The method for optimally designing the negative ring structure of the steel pipe sheet according to claim 1, wherein the method comprises the following steps: the two opposite sides of the steel pipe sheets (11) are fixedly connected through bolts.
3. The method for optimally designing the negative ring structure of the steel pipe sheet according to claim 2, wherein the method comprises the following steps: the steel pipe sheet (11) in the S1 is a special lining ring steel pipe sheet, the steel pipe sheet (11) is used for a subway communication channel and is matched and combined with a concrete pipe sheet for use, the inner diameter and the outer diameter of the steel pipe sheet (11) are 2650mm and 3150mm respectively, and the axial length is 550mm.
4. The method for optimally designing the negative ring structure of the steel pipe sheet according to claim 2, wherein the method comprises the following steps: the steel plate in the step S2 is steel which is formed by pouring molten steel, cooling and pressing.
5. The method for optimally designing the negative ring structure of the steel pipe sheet according to claim 2, wherein the method comprises the following steps: the finite element software in the S2 adopts Abaqus, and the universal module is buckle.
6. The method for optimally designing the negative ring structure of the steel pipe sheet according to claim 2, wherein the method comprises the following steps: the finite element software in S1 adopts Abaqus, the universal module is Static, and the analysis module is General.
7. A steel pipe sheet negative ring structure manufactured by the method for optimizing a steel pipe sheet negative ring structure according to any one of claims 1 to 6.
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| CN110737960B (en) * | 2019-11-14 | 2022-06-10 | 西南交通大学 | Shield tunnel segment design parameter optimization method |
| CN112343624B (en) * | 2020-11-04 | 2023-04-11 | 中铁十四局集团隧道工程有限公司 | Steel construction burden ring section of jurisdiction and support |
| CN112883600B (en) * | 2021-01-11 | 2022-05-20 | 西南交通大学 | Construction method of steel pipe concrete member overall and local damage joint evaluation model |
| CN113279788B (en) * | 2021-06-10 | 2022-07-22 | 北京市政建设集团有限责任公司 | Novel steel negative ring pipe structure for shield construction |
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