CN106372353A - Method for determining geometric dimension of caulking material on cement pavement - Google Patents
Method for determining geometric dimension of caulking material on cement pavement Download PDFInfo
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- CN106372353A CN106372353A CN201610825099.8A CN201610825099A CN106372353A CN 106372353 A CN106372353 A CN 106372353A CN 201610825099 A CN201610825099 A CN 201610825099A CN 106372353 A CN106372353 A CN 106372353A
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- calking
- stress
- caulking material
- cement pavement
- displacement
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
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- Road Paving Structures (AREA)
Abstract
The invention relates to a method for determining the geometric dimension of a caulking material on a cement pavement based on the actions of temperature and vehicle load, belongs to the technical field of road engineering cement pavements and aims to solve the problems that the geometric dimension of the caulking material determined by an existing method difficultly adapts to the cyclic change in cement pavement joint width expansion and retraction, and the durability is poor. The method provided by the invention comprises the following steps: firstly developing a cement pavement structure form and material properties according to the current specification and establishing a finite element model for a cement pavement structure containing the caulking material; analyzing displacement and stress change rules of the caulking material under the actions of temperature and vehicle load; considering the impact of different working conditions on the displacement and the stress performance of the caulking material at a joint and determining the most unfavorable stress state of the caulking material; selecting different caulking material widths and depths and depth-to-width ratios and investigating the maximum displacement and the stress change rules of the caulking material; comprehensively considering the displacement and the stress of the caulking material and determining the reasonable geometric dimension of the caulking material. According to the method provided by the invention, the caulking material better adapts to the cyclic change in cement pavement joint width expansion and retraction, and the stress state and the durability of the caulking material are improved.
Description
Technical field
The present invention is a kind of method determining cement pavement calking physical dimension under temperature and Vehicle Load, belongs to
Road engineering cement pavement technical field.
Background technology
In recent years, develop rapidly with highway in China cause, cement pavement has become the class of mainly mating formation of high grade pavement
One of type, is widely used in highway and urban road, and based on seam formula cement pavement.For effective control cement road surface plate
Contraction, warpage and temperature stress, reduce damage flexible, that panel is satisfied the need in buckling deformation, needs arrange various on pavement structure
Seam (includes expansion joint (E.J.), contracting seam etc.), and is sealed using various caulking material abutment joints, keeps the entirety on road surface from construction
Property, ride comfort and dense water, improve cement pavement durability and road-ability.
But, calking is easily cracking under traffic load and natural environment effect, the damage class such as extrude, come off
Type, so lead to cement pavement seam crossing easily occur faulting of slab ends, purt mud, come to nothing, destruction of joint etc..The serviceability of cement pavement
And service life is heavily dependent on sealing effectiveness and the durability of seam crossing calking.Therefore, research cement pavement is embedding
The stress performance of sewing, for the work efficiency of lifting calking, extends the service life of calking, and then fundamentally prevents
The too early appearance disease of cement pavement all has highly important impact.
Wherein, lead to calking damage a major reason be exactly physical dimension unreasonable it is difficult to adapt to cement pavement
Joint gap stretches circulation change.How to improve the serviceability of cement pavement, determine rational cement pavement calking geometry
Size, the filleting technology improving cement pavement is to meet the weight that the needs of traffic high speed development are that present road worker is faced
Want one of difficult problem.Simultaneously as the presence of seam, the globality of cement pavement structure has also been suffered to destroy so as to become road surface
One of weakest link of structure.In order to improve the serviceability on road surface, extend the structural life-time of calking, ensure that seam crossing is embedding
The excellent service behaviour of sewing, the entrance of the debris such as rainwater is prevented wherein to have very important effect.Accordingly, it is determined that rationally
Cement pavement calking physical dimension, make calking better conform to the horizontal width of cement pavement seam and the change of depth
Change, for the endurance issues disclosing calking from amechanical angle, improve calking sealing effectiveness and cement pavement driving is comfortable
Property has very important realistic meaning.
Experts and scholars pass through the mechanical analyses under sound load action, the physical dimension to cement pavement calking both at home and abroad
And the research of stress performance has achieved certain breakthrough.Researchers are directed to the pointing occur in pavement joint construction
The problems such as fragile, angle point is easy to crack, analyzes the relation between calking self-characteristic and joint gap and its depth.Research
Show, the maximum stress point of calking tends to occur at two corner points on top, and reply reinforcement herein is processed, and is divided by calculating
The depth-to-width ratio parameter of the Sealants that analysis demonstrates road surface is got the most suitable between 2 and 3.Additionally, researcher has been also adopted by
It is simulated respectively under finite element analysis software stress different with compression both to stretching respectively, seek an optimum excellent
Change design.
After the caulking gum material to different depth-to-width ratios is compressed, stretches the finite element modelling of two states,
It is found that with other several sizes Comparatively speaking, tension and pressure that under 2: 1 this depth-to-width ratio, caulking gum material is born
Stress is all minimum, and size is optimum, can preferably ensure that seam is in good use state.As can be seen here, calking is several
What size, such as depth-to-width ratio etc. directly influence the mechanical property of cement pavement, therefore pass through the determination of calking physical dimension, protect
Card seam crossing calking is in good use state, destroys led to problems all for solving current road calking
There is very important effect.
With the fast development of computer technology, the analysis method of finite element is gradually applied to cement pavement mechanical analyses and grinds
In the middle of studying carefully.The analysis method of computer technology and finite element is combined, by setting up the structural model being suitable for, establishing appropriately
Calculating parameter, and the time of day in simulated roadway structure, to realize the accurate simulation to the various challenge of road engineering.
The method has the advantages that cycle is short, expense be low, information completely and repeatability are good, is a kind of highly effective and widely used meter
Calculation method.The present invention, using general finite meta software as analysis platform, carries out temperature load and vehicle lotus based on Finite Element Method
The analysis of the calking stress performance under load effect determines calking reasonable geometric size so as to stress minimizes, and reduces stress
Concentrate, be conducive to improving cement pavement calking durability.
Due to being difficult to that its physical dimension is determined by the mechanical response rule of actual road surface experimental analysiss calking, at present
The calking physical dimension that method determines is difficult in adapt to the flexible circulation change of cement pavement joint gap, is easily caused stress concentration.
A kind of method as determining cement pavement calking physical dimension under temperature and Vehicle Load for the present invention, according to elastic layer
Shape system theory is analyzed simulating, and sets up the cement pavement structural model gearing to actual circumstances, systematic analysiss are in different road speeds
And dynamic load parameter, dead load size and its active position, contact status between layers, borderless contact condition, cell type, grid draw
The change of the mechanical characteristic of calking under the influence of operating mode of grading factor, inquires into power at temperature and Vehicle Load for the calking
Learn response pattern, so that it is determined that the mutual relation between the width of seam crossing calking, depth and depth-to-width ratio and its Changing Pattern,
The physical dimension to determine cement pavement calking for the mechanical characteristic of analysis calking.To the service life extending caulking material,
Improve the sealing effectiveness of calking, the durability and the road-ability that improve cement pavement calking are significant.
Content of the invention
(1) technical problem
It is an object of the present invention to provide determining cement pavement calking physical dimension under a kind of temperature and Vehicle Load
Method, the method takes into full account ambient temperature, vehicular load and pavement structure contact status between layers to cement pavement joint gap
The impact of change, determines rational calking physical dimension, reduces cohesiveness and concentrates, improve stress, solves current method
The calking physical dimension determining is difficult in adapt to the flexible circulation change of cement pavement joint gap, is easily caused stress concentration, makes embedding
Tension crack, the endurance issues such as extrudes, comes off in sewing, and more preferably meets the use requirement of cement pavement.
(2) technical scheme
The physical dimension of cement pavement seam crossing calking is unreasonable to be become it is difficult to adapting to cement pavement joint gap and stretching
Change, lead to calking stress concentration, produce tension crack, the endurance issues such as extrude, come off.Present invention basis first
Requirement in current specifications determines physical dimension and the material properties of cement pavement structure, sets up the water containing seam crossing calking
Mud pavement structure initial model, and determine the edge-restraint condition of institute's established model, carry out stress and strain model and encrypt seam crossing filleting
Material and about grid are accurately to analyze its displacement and stress；Analyze different temperatures amplitude of variation, road speed, lotus again
Carry the operating mode factor such as size and its active position, contact status between layers to the displacement on the horizontally and vertically direction of calking, draw,
Compressive stress and the impact of shear stress, determine least favorable Vehicle Load position and the stress of calking；Then, analyze
Displacement in calking maximum horizontal and vertical direction in the case of different in width, depth and depth-to-width ratio, draw, compressive stress and shearing should
Power Changing Pattern, consider the displacement on horizontally and vertically direction, draw, compressive stress and shear stress determine the geometry of calking
Size, for improving the stress of cement pavement calking, improves the durability of calking.
(3) beneficial effect
In the current cement pavement seam serviceability investigation of China, the damage of calking is very serious.It damages
Principal mode generally because the adhesiveness of calking is not enough there is unsticking phenomenon, main cause in the low-temperature shrink with road surface
Often with the physical dimension parameter of calking and relevant to factors such as its mechanical characteristics, so the physical dimension of calking need to be joined
Number determination method is studied and is inquired into.Therefore, in order to improve the durability of cement pavement calking, improve the road of cement pavement
With performance, the physical dimension accurately determining cement pavement calking just seems most important.The present invention adopts Finite Element Method
Simulation reappears the actual working state of cement pavement seam crossing calking, more scientifically determines the geometry of cement pavement calking
Size.The determination method of the present invention has the advantages that repeatability is good, cycle is short, expense are low, information completely, for solving current filleting
The physical dimension of material can make calking top layer stress excessive, thus lead to seam crossing calking unsticking, extrusion and stretching opening
Split etc. and to damage phenomenon, for the service life extending calking, the globality of cement pavement, ride comfort and close are guaranteed from construction
Aqueouss all have important practical significance.
Specific embodiment
It is an object of the present invention to provide determining cement pavement calking physical dimension under a kind of temperature and Vehicle Load
Method, specific implementation step is as follows:
(1) preliminary according to the pertinent regulations in existing " highway cement concrete pavement design specification (jtg d40-2011) "
Draft cement pavement structural grouping form, material properties and physical dimension, set up the knot of the cement pavement containing seam crossing calking
The initial FEM (finite element) model of structure；
(2) stress and strain model is carried out using the Reduced Integral solid element of 8 node two dimensional plane strains, encrypt seam crossing filleting
Material and grid about so that using grid simulation calking at temperature and Driving Loading horizontally and vertically
Displacement, draw, compressive stress and shear stress Changing Pattern；
(3) consider that different temperatures amplitude of variation, road speed, axle for vehicle carry size and its active position, material properties, layer
Between change in displacement on the horizontally and vertically direction of calking at contact condition abutment joint, drawing in horizontal direction, compressive stress, cut
The impact of shearing stress, determines the least favorable stress of seam crossing calking；
(4) change the physical dimension of calking under calking least favorable stress, choose different calking width,
Depth and depth-to-width ratio investigate displacement on calking maximum horizontal and vertical direction, draw, compressive stress and shear stress Changing Pattern；
(5) consider the displacement on horizontally and vertically direction, draw, compressive stress and shear stress, optimize and determine filleting
The reasonable geometric size of material, makes calking better conform to the flexible circulation change of cement pavement joint gap, and makes calking stress
Minimize, reduce stress concentration, improve the stress of cement pavement calking, improve the durability of calking.
Claims (1)
1. a kind of determination method of cement pavement calking physical dimension is it is characterised in that specifically comprising the following steps that of the method
(1) tentatively drafted according to the pertinent regulations in existing " highway cement concrete pavement design specification (jtg d40-2011) "
Cement pavement structural grouping form, material properties and physical dimension, set up at the beginning of the cement pavement structure containing seam crossing calking
Beginning FEM (finite element) model；
(2) stress and strain model is carried out using the Reduced Integral solid element of 8 node two dimensional plane strains, encryption seam crossing calking and
Grid about, to simulate horizontally and vertically position at temperature and Driving Loading for the calking using grid
Move, draw, compressive stress and shear stress Changing Pattern；
(3) consider that different temperatures amplitude of variation, road speed, axle for vehicle carry size and its active position, material properties, interlayer connect
Drawing in the change in displacement on the horizontally and vertically direction of calking at tactile state abutment joint, horizontal direction, compressive stress, shearing should
The impact of power, determines the least favorable stress of seam crossing calking；
(4) change the physical dimension of calking under calking least favorable stress, choose different calking width, depth
And depth-to-width ratio investigate displacement on calking maximum horizontal and vertical direction, draw, compressive stress and shear stress Changing Pattern；
(5) consider the displacement on horizontally and vertically direction, draw, compressive stress and shear stress, optimize and determine calking
Reasonable geometric size, makes calking better conform to the flexible circulation change of cement pavement joint gap, and makes calking stress minimum
Change, reduce stress concentration, improve the stress of cement pavement calking, improve the durability of calking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610825099.8A CN106372353A (en) | 2016-09-14 | 2016-09-14 | Method for determining geometric dimension of caulking material on cement pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610825099.8A CN106372353A (en) | 2016-09-14 | 2016-09-14 | Method for determining geometric dimension of caulking material on cement pavement |
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| CN106372353A true CN106372353A (en) | 2017-02-01 |
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| CN201610825099.8A Pending CN106372353A (en) | 2016-09-14 | 2016-09-14 | Method for determining geometric dimension of caulking material on cement pavement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113656856A (en) * | 2021-06-30 | 2021-11-16 | 南通大学 | Method for filling space between pavement and embedded device |
Citations (2)
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|---|---|---|---|---|
| US20030089071A1 (en) * | 2001-10-18 | 2003-05-15 | Johannes Wageneder | Method for proving the safety against collapse of load-bearing systems under fire load |
| CN104992019A (en) * | 2015-07-02 | 2015-10-21 | 北京交通大学 | Simplified design method for continuously-welded rail of ballastless track of ultra-large bridge of railway |
-
2016
- 2016-09-14 CN CN201610825099.8A patent/CN106372353A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030089071A1 (en) * | 2001-10-18 | 2003-05-15 | Johannes Wageneder | Method for proving the safety against collapse of load-bearing systems under fire load |
| CN104992019A (en) * | 2015-07-02 | 2015-10-21 | 北京交通大学 | Simplified design method for continuously-welded rail of ballastless track of ultra-large bridge of railway |
Non-Patent Citations (3)
| Title |
|---|
| 王冬亚: "移动荷载作用下水泥混凝土路面接缝性能有限元分析", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 王志军: "水泥混凝土路面接缝填缝料的受力状态分析", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 苏尔好 等: "机场水泥道面接缝位移及嵌缝材料结构应力", 《解放军理工大学学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113656856A (en) * | 2021-06-30 | 2021-11-16 | 南通大学 | Method for filling space between pavement and embedded device |
| CN113656856B (en) * | 2021-06-30 | 2023-11-21 | 南通大学 | Filling method between pavement and embedded device |
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Application publication date: 20170201 |
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