CN105447229B - Winter conveyance canal side slope concrete lining course frost heaving resistant destroys Method for Checking - Google Patents
Winter conveyance canal side slope concrete lining course frost heaving resistant destroys Method for Checking Download PDFInfo
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- CN105447229B CN105447229B CN201510773619.0A CN201510773619A CN105447229B CN 105447229 B CN105447229 B CN 105447229B CN 201510773619 A CN201510773619 A CN 201510773619A CN 105447229 B CN105447229 B CN 105447229B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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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
Abstract
The present invention relates to a kind of winter conveyance canal side slope concrete lining course frost heaving resistant destruction Method for Checking, in the design applied to open channel canal for water conveyance, the force analysis of canal base soil frost heave action slope concrete lining course is carried out.A kind of winter conveyance canal side slope concrete lining course frost heaving resistant destruction Method for Checking, by the concrete lining course of canal side slope be regarded as be at slope foot fixed-hinged support, at water level face be movable hinged-support component, the mechanical model that canal side slope concrete lining course frost heaving resistant destroys checking computations is established, judges that can side slope concrete lining course resist the destruction of frost heave action generation compared with the axial tensile strength of concrete by the stress that the transverse curvature effect of component or/and stretch bending compound action generate.Frost heaving resistant of the present invention destroys Method for Checking, consider canal slope it is two-way freeze and concrete lining course and canal base soil deformation interaction influence, compensate for deficiency existing for current Frozen Area concrete canal winter water delivery situation slope concrete lining layer frost heaving resistant damage capability Method for Checking.
Description
Technical field
The present invention relates to a kind of winter conveyance canal side slope concrete lining course frost heaving resistants to destroy Method for Checking, is applied to open channel
In the design of canal for water conveyance, the force analysis of canal base soil frost heave action slope concrete lining course is carried out.
Background technique
Trapezoidal concrete-lined canal is wide because of the advantage that its is easy for construction, maintenance reparation is simple and project durability is strong
Open channel emptying effectiveness is improved, the shock-absorbing capacity of channel is enhanced and improves the mesh of flow condition to reach using in water delivery engineering generally
's.The side slope concrete lining course plagioclase of channel is determined according to HYDRODYNAMIC CONDITION RELATING TO, the thickness of lining cutting layer empirically depending on.
This method is applicable for the concrete-lined canal in the area Fei Han；The concrete-lined canal in the area Er Duihan both makes to consider
The influence of frost heave action and specially increase lining cutting thickness degree, but also can because the non-uniform freezing of canal base soil expand displacement cause to serve as a contrast
Course generates the breakoff phenomenons such as crack, protuberance and slump.This has seriously affected the direct performance of project benefit.
Currently, for winter only the central line tunnel concrete lining in south layer of water thickness determination have corresponding method, i.e., to quilt
It is considered as the force analysis that concrete lining course hinged between entirety or plate carries out, carries out lining cutting layer strength checking, this method accordingly
Normal frost heave direction under middle concrete lining course is the exterior normal direction of slope surface, and tangent coordinate system is directed to slope foot,
There is fundamental difference with the frost-heave force action mode and range of winter canal for water conveyance side slope lining cutting layer, is completely unusable for winter water delivery
The strength checking of the concrete lining course of channel.
The Method for Checking of the freeze proof expansive force of winter canal for water conveyance side slope concrete lining course is just appeared in the newspapers, report method institute
The mechanical model of use are as follows: by the tangent coordinate system and direction that are directed toward top of the slope and slope surface exterior normal side under side slope concrete lining course
To consistent Normal frost heave, both to be uniformly distributed.Do not account for that conveyance canal side slope is two-way to be freezed in the mechanical model
And the influence of concrete lining course and the deformation interaction of canal base soil.
Summary of the invention
The present invention is in view of the shortcomings of the prior art, propose a kind of broken for winter conveyance canal side slope concrete lining course frost heaving resistant
Bad Method for Checking.In the case that consider canal slope it is two-way freeze, the influence such as lining cutting layer and canal base soil compatibility of deformation establish freeze proof burst
The mechanical model of bad ability checking computations destroys checking computations to carry out frost heaving resistant closer to actual mechanical model, to ensure that lining cutting layer has
There is adequate thickness, guarantees the safe and reliable operation of channel, farthest play project benefit.
Winter, in canal water level face side slope concrete lining course below and its lower soil body because by temperature in channel for 0 DEG C with
On water in a canal protection, temperature maintains 0 DEG C or more, and the soil body is without freezing, and the concrete lining course of underwater sites is without displacement；And water level
Side slope concrete lining course more than face is exposed to the atmosphere, and under the action of atmosphere subzero temperature, water level face is with the coagulation of upper bit
Aquifer freezing expansion under native lining cutting layer, the concrete lining course at this position just have along slope surface to top of the slope and vertical slope surface
Displacement trend into canal, causing side slope concrete lining course is the component of a stretch bending.
The Qu Di lower layer soil body does not freeze and the effect of the freezing expansion of the upper layer soil body makes side slope lining cutting layer have angular displacement around slope foot,
Lining cutting layer and canal base soil local detachment under water level face, the above canal base penus in water level face is freezed in two-way, and frost heave is perpendicular to
Freezing front, so the normal direction frost heaving amount perpendicular to lining cutting level of soil body each point is water level under side slope lining cutting layer
Normal direction frost heaving amount (maximum) near face is greater than at top of the slope, but the concrete lining course lower surface after angular displacement still keeps flat
Face, i.e., Normal Displacement (minimum) at water level face is compared with small at top of the slope, referring to Fig. 1.In this way, the side slope in canal frozen base soil section
Lining cutting layer and its lower soil body displacement are uncoordinated, and the two is to be separated, and initially freezes the canal base soil being integrated and concrete lining course
Between just produce mutual constraint, side slope concrete lining course, which receives, freezes soil body effect, direction and slope surface inter normal
The consistent Normal frost heave in direction.The difference of the normal direction frost heaving amount of the Normal Displacement and canal dike soil of frost heave position concrete lining course exists
Water level face is zero, maximum at top of the slope, thus the Normal frost heave of top of the slope is maximum.
The tangential frost heave displacement for being directed toward top of the slope direction along slope surface is displaced similar, the tangential frost heave position of top of the slope with normal direction frost heave
It moves and is greater than at water level face, concrete lining course is small compared at top of the slope at water level face by the tangent coordinate system for being directed toward top of the slope.
When Frozen Soil body can constrain the displacement of side slope concrete lining layer, i.e., the two is freezed to be integrated, in other words, side
Slope concrete lining course with freeze the soil body and do not separate, at this point, be at slope foot hinged-support, at water level face be movable hinged-support side slope
Concrete lining course also receives direction and the consistent method in slope surface inter normal direction other than by water pressure and self weight in frost heave area
To the tangent coordinate system of frost-heave force and direction top of the slope, the two is Triangle-Profile, is maximum value at top of the slope.
If the displacement of side slope concrete slab cannot be constrained by freezing the soil body, i.e., the two separates, and is hinged-support, water level at slope foot
Be the side slope concrete lining course of movable hinged-support at face only by water pressure and self weight, at this time side slope concrete lining course be one by
Curved component.
Side slope concrete lining course will have enough thickness in above-mentioned two situations, to avoid strength failure, protect
Channel is demonstrate,proved to operate normally safely.
Based on above-mentioned, present invention employs the following technical solutions:
A kind of winter conveyance canal side slope concrete lining course frost heaving resistant destruction Method for Checking, for the canal side slope of no horizontal joint
Concrete lining course, by the concrete lining course of canal side slope, to be regarded as be fixed-hinged support at slope foot, at water level face is that activity is hinged
The component of seat establishes the mechanical model that canal side slope concrete lining course frost heaving resistant destroys checking computations, acts on by the transverse curvature of component
Or/and the stress that stretch bending compound action generates judges side slope concrete lining course energy compared with the axial tensile strength of concrete
The no destruction resisting frost heave action and generating.
The winter conveyance canal side slope concrete lining course frost heaving resistant destroys Method for Checking, by applying the mechanics mould
Type is considering that carrying out side slope concrete lining course frost heaving resistant in canal under each water level under two kinds of effects of canal base soil frost heave action destroys
Checking computations:
The first situation is effect of the side slope concrete lining course in water level face with the upper surface of lower portion by water pressure,
In water level face with the lower surface of upper bit by the effect of frost-heave force；
Second situation is that side slope concrete lining course only has water pressure in channel water plane with the upper surface of lower portion
Effect.
The winter conveyance canal side slope concrete lining course frost heaving resistant destroys Method for Checking, if water level face is with upper bit
Side slope concrete lining course can constrain the canal base soil expansion displacement freezed, then canal base soil side slope concrete lining course is tangential
It is zero that frost-heave force and Normal frost heave, which are using the value at water in a canal plane, at the slope Qu Ding as the linear distribution of maximum value；
If water level face can not constrain the canal base soil expansion displacement freezed, canal with the side slope concrete lining course of upper bit
Base soil acts on side slope concrete lining course without frost-heave force, only makes side slope concrete lining course that angular displacement, lining cutting occur into canal
The lower surface of layer subrange is separated with its lower soil body.
The winter conveyance canal side slope concrete lining course frost heaving resistant destroys Method for Checking, canal base soil side slope concrete
The frost-heave force of lining cutting layer is the frost heaving pressure and direction and the consistent method in slope surface inter normal direction to be directed toward top of the slope along slope surface
Channel water plane is acted on to the form of frost heave stress with the lower surface of upper bit lining cutting layer.
It is that the present invention generates the utility model has the advantages that
1, winter conveyance canal side slope concrete lining course frost heaving resistant of the invention destroys Method for Checking, it is contemplated that the two-way jelly in canal slope
Knot and the deformation interaction of concrete lining course and canal base soil influence, and it is anti-to establish winter canal for water conveyance side slope concrete lining course
The mechanical model of frost heaving failure checking computations, compensates for current Frozen Area concrete canal winter water delivery situation slope concrete
Deficiency existing for lining cutting layer frost heaving resistant damage capability Method for Checking.
2, winter conveyance canal side slope concrete lining course frost heaving resistant of the invention destroys Method for Checking, is considering the two-way jelly in canal slope
The mechanical model of frost heaving resistant damage capability checking computations is established in knot, lining cutting layer and the soil compatibility of deformation of canal base etc. in the case of influencing, more to paste
Nearly actual mechanical model carries out frost heaving resistant and destroys checking computations, to ensure that lining cutting layer has adequate thickness, guarantees that the safety of channel can
The operation leaned on, farthest plays project benefit.
Detailed description of the invention
Fig. 1: plan of transposition when winter canal for water conveyance side slope concrete lining course frost heave；
In figure,Canal dike soil is positive temperature, i.e., the soil body does not freeze in the region,Canal dike soil is subzero temperature, i.e., native in the region
Body is frozen, 1 canal base soil frost heave actual surface line；The 2 non-frost heave surface lines of canal base soil；3 freeze preceding forward line；It is served as a contrast before 4 non-frost heaves
Course position；5 water in a canal positions；6 frost heave backsight course positions；
Fig. 2: side slope concrete lining course force diagram when winter canal for water conveyance frozen soil and lining cutting layer do not separate；
Fig. 3: side slope concrete lining course force diagram when winter canal for water conveyance frozen soil and lining cutting layer separate；
In figure, qFor Normal frost heave；τFor tangent coordinate system；GFor the resultant force of equally distributed concrete lining course self weight
Value；p wFor water pressure intensity at slope foot；αAngle between plate and horizontal plane；AFor movable hinged-support；B is fixed-hinged support.
Specific embodiment
Below by specific embodiment, technical scheme of the present invention will be described in further detail.
Embodiment 1
The invention proposes winter conveyance canal side slope concrete lining course frost heaving resistants to destroy Method for Checking, for no horizontal joint
Canal side slope concrete lining course, the concrete lining course of canal side slope is regarded as to be that fixed-hinged support, water level are at slope foot at face
The component of movable hinged-support establishes the mechanical model that canal side slope concrete lining course frost heaving resistant destroys checking computations, by the transverse direction of component
The stress that flecition or stretch bending compound action generate judges side slope concrete lining compared with the axial tensile strength of concrete
Can course resist the destruction of frost heave action generation.
Embodiment 2
Winter conveyance canal side slope concrete lining course frost heaving resistant described in the present embodiment destroys Method for Checking, with embodiment
1 the difference is that: mechanical model needed for constitution and implementation example 1 so as to carry out concrete lining course frost heaving resistant destruction test
It calculates,
When side slope concrete lining course can constrain canal base soil frost-heaving deformation, the two compatibility of deformation, side slope concrete lining
Freeze to be integrated between layer and frozen soil, frost-heave force is with direction and the consistent Normal frost heave in slope surface inter normal direction and to refer at this time
Side slope concrete lining course is only acted in the area above of water level face to the form of the tangent coordinate system of top of the slope, and is both
Be zero using the value at water in a canal plane, at the slope Qu Ding as the linear distribution of maximum value；As the first situation, side slope concrete lining
The mechanical model of layer is the effect in meter water level face with the upper surface of lower portion by water pressure, in water level face under upper bit
The stretch bending component that surface is acted on by frost-heave force.
When side slope concrete lining course cannot constrain canal base soil frost-heaving deformation, both it is uncoordinated, in other words, the two separation
When, effect of the frozen soil to concrete lining course without frost-heave force in frozen region, as second situation, side slope concrete lining
The mechanical model of layer is the flexural member for only having effect of water pressure with the upper surface of lower portion in channel water plane.
Considering to carry out under two kinds of effects of canal base soil frost heave action under each water level in canal by the application mechanical model
Side slope concrete lining course frost heaving resistant destroys checking computations.
Winter conveyance canal side slope concrete lining course frost heaving resistant of the present invention destroys Method for Checking, canal dike soil side slope
The frost-heave force of concrete lining course is with the frost heaving pressure and direction that are directed toward top of the slope along slope surface and slope surface inter normal direction one
The form of the normal direction frost heave stress of cause acts on channel water plane with the lower surface of upper bit lining cutting layer or side slope concrete lining
Layer is not by the effect of frost-heave force.
Embodiment 3
It is freeze proof to specifically describe winter conveyance canal side slope concrete lining course of the invention by taking actual conditions as an example for the present embodiment
Burst directiveness application of the bad Method for Checking in conveyance canal engineering:
Winter crosses the lining cutting anti-seepage channel that the strength grade of concrete of water is C20, and canal is deep=4.5m, channel water are deep=
3.5m, slope coefficient=1.5, side slope lining cutting layer is with a thickness of 0.2m, frost heaving pressure (Triangle-Profile)
The bulk density of kPa, concrete and water is distinguishedNormal direction frost heave stresspMaximum value isKPa is tested
Calculate whether side slope concrete lining course frost heaving resistant ability meets the requirements.
The first situation: referring to fig. 2,
1) moveable hinge end reaction and canal bottom at water in a canal plane are obtained according to the power of side slope concrete lining course and equalising torque
Fixed-hinged support counter-force is respectively
kN
N
N, so not being pulled out；WhenIt is negative, i.e. direction bottom of slope end, and absolute value is no more than under plate not
Frozen soil to lining cutting layer frictional resistance when, lining cutting layer is not pulled out.
2) the maximum axle power value of lining cutting layer
N is away from top of the slope 1.784m, i.e., at water level face
3) Maximum bending moment of lining cutting layer
4) cross-sectional area of lining cutting layer and section resistance moment
Cross-sectional aream2
Cross section resistance moment
5) maximum tension stress value
Then maximum tension stressMPa>>1.10MPa
Side slope concrete lining course can not resist the destruction of frost-heave force, i.e. frost heaving resistant damage capability is insufficient.
Second situation: referring to Fig. 3,
1) according to the balance of the power of side slope concrete lining course and torque obtain at water in a canal plane moveable hinge end reaction and
Canal bottom fixed-hinged support counter-force is respectively
N
N
N i.e. be directed toward bottom of slope, if the value be no more than plate under non-frozen soil to lining cutting layer frictional resistance when, channel
Bottom plate is not influenced by side slope plate.
2) the maximum axle power value of lining cutting layer
N is in slope bottom end
3) Maximum bending moment of lining cutting layer
4) cross-sectional area of lining cutting layer and section resistance moment
Cross-sectional aream2
Cross section resistance moment
5) maximum tension stress value
ThenMPa>>1.10MPa
Side slope concrete lining course cannot resist the destruction of frost-heave force.
So not being able to satisfy freeze proof requirement when the canal side slope concrete lining layer is with a thickness of 0.2 meter.
Claims (1)
1. a kind of winter conveyance canal side slope concrete lining course frost heaving resistant destroys Method for Checking, mixed for the canal side slope of no horizontal joint
Solidifying soil lining cutting layer, by the concrete lining course of canal side slope, to be regarded as be fixed-hinged support at slope foot, at water level face is movable hinged-support
Component, establish canal side slope concrete lining course frost heaving resistant destroy checking computations mechanical model；
The stress generated by the transverse curvature effect of component or/and stretch bending compound action is compared with the axial tensile strength of concrete
To judge that can side slope concrete lining course resist the destruction of frost heave action generation；
Considering to carry out side slope under two kinds of effects of canal base soil frost heave action under each water level in canal by the application mechanical model
Concrete lining course frost heaving resistant destroys checking computations:
The first situation is effect of the side slope concrete lining course in water level face with the upper surface of lower portion by water pressure, in water
Plane is with the lower surface of upper bit by the effect of frost-heave force；
Second situation is that side slope concrete lining course only plays the role of water pressure in channel water plane with the upper surface of lower portion；
It is characterized by:
If water level face can constrain the canal base soil expansion displacement freezed with the side slope concrete lining course of upper bit, canal base soil is right
It is zero that the tangent coordinate system and Normal frost heave of side slope concrete lining course, which are with the value at water in a canal plane, is most at the slope Qu Ding
The linear distribution being worth greatly；
If water level face can not constrain the canal base soil expansion displacement freezed, canal base soil with the side slope concrete lining course of upper bit
No frost-heave force acts on side slope concrete lining course, only makes side slope concrete lining course that angular displacement, lining cutting layer office occur into canal
The lower surface of portion's range is separated with its lower soil body；
The frost-heave force of canal dike soil side slope concrete lining course be with along slope surface be directed toward top of the slope frost heaving pressure and direction with
The form of the consistent normal direction frost heave stress in slope surface inter normal direction acts on channel water plane with the lower surface of upper bit lining cutting layer；
Or side slope concrete lining course is not by the effect of frost-heave force.
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| CN201510773619.0A CN105447229B (en) | 2015-11-13 | 2015-11-13 | Winter conveyance canal side slope concrete lining course frost heaving resistant destroys Method for Checking |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106529046B (en) * | 2016-11-16 | 2019-09-13 | 石河子大学 | The frost heaving resistant of concrete ladder-shaped canal destroys Method for Checking when winter low water level operation |
| CN107178392B (en) * | 2017-06-28 | 2019-04-02 | 中铁第四勘察设计院集团有限公司 | A method of control Tunneling by mining method secondary lining water pressure |
| CN108334713B (en) * | 2018-02-25 | 2020-02-07 | 吉林农业科技学院 | Minimum concrete irrigation channel lining thickness calculation method based on table lookup method |
| CN108519477B (en) * | 2018-04-24 | 2023-10-13 | 西南科技大学 | Seasonal frozen soil area roadbed model test system |
| CN114485516B (en) * | 2022-01-26 | 2023-07-14 | 重庆交通大学 | Dangerous rock collapse real-time early warning method and system considering frost heaving force effect in fracture |
| CN115146357B (en) * | 2022-07-14 | 2024-02-27 | 郑州大学 | Analysis method for influence of frost heaving of soil body on concrete panel |
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