CN110263490A - The interim face stress analysis method of concrete dam body - Google Patents
The interim face stress analysis method of concrete dam body Download PDFInfo
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- CN110263490A CN110263490A CN201910608912.XA CN201910608912A CN110263490A CN 110263490 A CN110263490 A CN 110263490A CN 201910608912 A CN201910608912 A CN 201910608912A CN 110263490 A CN110263490 A CN 110263490A
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Abstract
The present invention provides a kind of interim face stress analysis methods of concrete dam body, are related to hydraulic and hydroelectric engineering technical field, the interim face stress analysis method of concrete dam body provided by the invention, comprising: determine the default keeping warm mode of dam surface；Determine surface coefficient of heat transfer；Concrete thermal field is calculated according to surface coefficient of heat transfer, and the temperature stress that calculating temperature difference generates is simulated according to concrete thermal field；Judge safety of dam body situation, and dam surface Insulation be adjusted, the interim face stress analysis method of concrete dam body provided by the invention alleviate dam surface keeping warm mode in the prior art construction lack rational basis the technical issues of.
Description
Technical field
The present invention relates to hydraulic and hydroelectric engineering technical fields, more particularly, to a kind of interim face stress analysis of concrete dam body
Method.
Background technique
It is concrete dam common quality problem that crack is generated because of local temperature difference, and conventional temperature controlled anticracking method includes: drop
The measures such as low placing temperature, water flowing cooling and surface heat preservation.Therefore cracking of the keeping warm mode of concrete surface to dam surface
Situation has larger impact, however due to standby storehouse etc., the Insulation for the dam body concrete construction intermittent phase that winter pours is difficult
Exempt to be lifted, and should make every effort to using inexpensive lagging facility, thus during cold wave to reduce production cost dam surface
Because environment temperature reduction will lead to dam surface problem of Cracking.It makes rational planning for due to lacking keeping warm mode, when concrete dam body construction,
Dam surface is typically employed in carry out keeping the temperature pretreated mode, when discovery dam surface occur cracking, reinforce Insulation,
Thus in construction period, there are larger trial and error costs, and because dam surface cracking affects dam construction quality.
Summary of the invention
The purpose of the present invention is to provide a kind of interim face stress analysis methods of concrete dam body, to alleviate in the prior art
The construction of dam surface keeping warm mode lacks the technical issues of rational basis.
In a first aspect, the interim face stress analysis method of concrete dam body provided by the invention, comprising: determine dam surface
Default keeping warm mode；Determine surface coefficient of heat transfer；Concrete thermal field is calculated according to surface coefficient of heat transfer, and according to concrete thermal field
Simulate the temperature stress that calculating temperature difference generates；Judge safety of dam body situation, and dam surface Insulation is adjusted.
With reference to first aspect, the present invention provides the first possible embodiments of first aspect, wherein the determination
The step of default keeping warm mode of dam surface includes: that dam surface is divided into following type according to dam surface state:
GK1: it is laid with the insulation quilt of moisture state；GK2: heat preservation is laid bad；GK3: it is laid with the insulation quilt that ponding is arranged at lower part；Dam body table
Face is without insulation quilt.
The possible embodiment of with reference to first aspect the first, second the present invention provides first aspect are possible
Embodiment, wherein under conditions of the dam surface is without insulation quilt, whether detection dam surface wind speed is greater than default wind
Speed；If the dam surface wind speed is less than or equal to the default wind speed, the type of the dam surface is GK4: the first kind without
Insulation quilt state；If the dam surface wind speed is greater than the default wind speed, the type of the dam surface is GK5: second
Class is without insulation quilt state.
With reference to first aspect, the present invention provides the third possible embodiments of first aspect, wherein the coagulation
The interim face stress analysis method of earth dam body further include: detect environmental information by interval of preset time, the environmental information includes
Temperature data and dam surface wind speed；The preset time is 2min~5min.
With reference to first aspect, the present invention provides the 4th kind of possible embodiments of first aspect, wherein the determination
The step of surface coefficient of heat transfer includes: that the first of default surface coefficient of heat transfer sets value β0, the initial calculation temperature of simulation measuring and calculating test point
Degree；First time error amount is calculated according to the following formula,Wherein, Teer(1)For
First time error amount, unit are degree Celsius；N is the time total step number divided in calculating process；Kb(i0)For surface coefficient of heat transfer β0
Under the conditions of, time step is the calculating temperature of measuring point when i is walked, and unit is degree Celsius；Kc(i)It is the reality of measuring point when i is walked for time step
Temperature, unit are degree Celsius；M subsurface coefficient of heat transfer, β are calculated according to the following formulam=β0+ Δ β (m-1), wherein βm
For m subsurface coefficient of heat transfer, Δ β is default increment value, and m is more than or equal to 2；Simulation measuring and calculating the m times calculating temperature of test point, and
The m times error amount is calculated according to the following formula,Wherein, Kb(im)For surface
Coefficient of heat transfer βmUnder the conditions of, time step is the calculating temperature of measuring point when i is walked；Until Teer(m)<Teer(m+1), then surface coefficient of heat transfer β
=βm。
With reference to first aspect, the present invention provides the 5th kind of possible embodiments of first aspect, wherein the determination
The step of surface coefficient of heat transfer includes: the gauging surface coefficient of heat transfer according to the following formula when the dam surface is without insulation quilt,
β=523.2+324.72va, wherein vaFor dam surface wind speed, unit m/s.
The possible embodiment of second with reference to first aspect, the 6th kind the present invention provides first aspect are possible
Embodiment, wherein the step of judgement safety of dam body situation includes: according to formulaCalculate safety of dam body coefficient
Kf, wherein σ is the sum of the temperature stress that the various temperature difference generate, unit MPa；εpValue is drawn high for the concrete limit；EcFor coagulation
Native elasticity modulus, unit MPa.
The 6th kind of possible embodiment with reference to first aspect, the 7th kind the present invention provides first aspect are possible
Embodiment, wherein if Kf< 1.5, and dam surface is laid with the insulation quilt of moisture state, then increases the number of plies of the insulation quilt；
If Kf>=1.5, dam surface is then determined as dam body without cracking risk without insulation quilt.
The 6th kind of possible embodiment with reference to first aspect, the 8th kind the present invention provides first aspect are possible
Embodiment, wherein if Kf(q)>=1.5, and Kf(q+1)When < 1.5, then GK is configured by the dam surface stateq；Wherein, q is
The type of the dam surface state is numbered, GKqThe dam surface state for being q for number, Kf(q)For q kind dam surface state
Corresponding safety coefficient.
The 6th kind of possible embodiment with reference to first aspect, the 9th kind the present invention provides first aspect are possible
Embodiment, wherein the interim face stress analysis method of concrete dam body further include: calculated according to prediction cold wave temperature simulation
The temperature stress during cold wave；According to safety of dam body COEFFICIENT K described in the temperature stress calculationf；If the safety coefficient Kf
Less than 1.5, then early warning is issued, and reinforces the heat preservation of the dam body.
The embodiment of the present invention brings following the utility model has the advantages that using the default keeping warm mode for determining dam surface, determines table
Face coefficient of heat transfer calculates concrete thermal field according to surface coefficient of heat transfer, and simulates what calculating temperature difference generated according to concrete thermal field
Temperature stress judges safety of dam body situation, and to the mode that dam surface Insulation is adjusted, is set according to preset heat preservation
Measuring and calculating dam surface coefficient of heat transfer, and temperature stress caused by calculating temperature difference are set, to evaluate the dam under default keeping warm mode
Body cracking risk to learn dam body installation situation, and reasonably adjusts the Insulation of dam surface according to safety of dam body situation,
Reinforce heat preservation without cracking to dam surface, and can avoid heat preservation and excessively generate higher cost.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
Technical solution in order to illustrate more clearly of the specific embodiment of the invention or in the related technology, below will be to specific
Attached drawing needed in embodiment or description of Related Art is briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow diagram of the interim face stress analysis method of concrete dam body provided in an embodiment of the present invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.Physical quantity in formula, such as without individually
Mark, it is thus understood that the fundamental quantity of International System of Units basic unit, alternatively, passing through the number such as multiplication and division, differential or integral by fundamental quantity
Derived derived quantity is calculated in student movement.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Embodiment one
As shown in Figure 1, the interim face stress analysis method of concrete dam body provided in an embodiment of the present invention, comprising: determine dam
The default keeping warm mode in body surface face；Determine surface coefficient of heat transfer；Concrete thermal field is calculated according to surface coefficient of heat transfer, and according to mixed
The temperature stress that the solidifying soil temperature numerical simulation temperature difference generates；Judge safety of dam body situation, and dam surface Insulation is carried out
Adjustment.
Specifically, live automatic collection temperature record, solar radiation data and dam body information data, and send data to
Server.Under conditions of default keeping warm mode, measuring and calculating dam surface coefficient of heat transfer, and root are simulated using finite element method
Dam surface stress, which is calculated, according to surface coefficient of heat transfer draws dam surface stress prediction curve.Permitted according to surface stress and concrete
Perhaps tensile strength judges the safe condition of dam surface, alternatively, corresponding safety coefficient is determined according to dam surface stress, thus
Safety of dam body grade is divided, further according to the Insulation of dam surface safe condition adjustment dam surface.For example, if dam body exists
Cracking risk then reinforces dam heating insulation measure, and carries out above-mentioned calculating, until dam surface reaches safe condition；If dam surface
Without cracking risk, then weaken current Insulation, and carry out above-mentioned calculating, under conditions of dam surface is without cracking risk, adopts
With lower-cost Insulation, to reduce construction cost.
In embodiments of the present invention, the step of determining the default keeping warm mode of dam surface includes: according to dam surface shape
Dam surface is divided into following type: GK by state1: it is laid with the insulation quilt of moisture state；GK2: heat preservation is laid bad；GK3: paving
There is the insulation quilt of ponding in the portion of setting；Dam surface is without insulation quilt.Wherein, GK1Heat insulation effect be better than GK2, GK2Heat insulation effect
It is better than GK3；In GK1On the basis of, it can be by increasing the number of plies of insulation quilt to further increase heat insulation effect；When insulation quilt is taken
Bad, insulation quilt is connect in the presence of bad there are in the case where spacing, can be considered that heat preservation is laid between damaged or adjacent insulation quilt.
Further, under conditions of dam surface is without insulation quilt, whether detection dam surface wind speed is greater than default wind speed；
If dam surface wind speed is less than or equal to default wind speed, the type of dam surface is GK4: the first kind is without insulation quilt state；If dam
Body surface wind speed is greater than default wind speed, then the type of dam surface is GK5: the second class is without insulation quilt state.Wherein, wind speed is preset
It can be set as 4m/s~5m/s, by taking default wind speed is set as 4m/s as an example, when dam surface wind speed is greater than 4m/s, be then determined as no guarantor
Temperature quilt and windy conditions, i.e., be determined as GK for dam surface state5: the second class is without insulation quilt state.When dam surface wind speed is small
When being equal to 4m/s, then it is determined as no insulation quilt and gentle breeze or calm condition, i.e., dam surface state is determined as GK4: first
Class is without insulation quilt state.
Further, the interim face stress analysis method of concrete dam body further include: detect environment by interval of preset time
Information, environmental information include temperature data and dam surface wind speed；Preset time is 2min~5min.Wherein, environmental information is also
Include the solar radiation data that small meteorologic instrument obtains, miniclimate instrument can be arranged at upstream cofferdam, with 3min/ times
Frequency transfers temperature record and solar radiation data, to the foundation as prediction dam surface temperature, i.e. dam surface temperature
It levels off to dam surface temperature, and thermal field curve is drawn according to white surface temperature.
Further, the interim face stress analysis method of concrete dam body further include: finite element grid is carried out to dam surface
It divides, grid dividing step includes: that the base layer poured using within the regular period carries out grid dividing as analysis object；Wherein, edge
Yokogawa direction size of mesh opening ratio uses 0.1:0.9:2:7:7:2:0.9:0.1；1:2 is used along river direction size of mesh opening ratio:
8:8:2:1；Grid height chooses the height of six height layers, and the size in newest pouring layer short transverse is 0.1m, remaining is poured
Building the size on layer height direction is 0.5m.It is warm inside dam body using finite element analysis computation dam body temperature and corresponding stress
Degree can be determined by way of finite element analysis or Inversion Calculation, and be verified compared with measured data with realizing.
Further, for GK1: it is laid with the insulation quilt of moisture state, GK2: heat preservation is laid bad and GK3: it is laid with
These three states of the insulation quilt of ponding are arranged at lower part, can take following steps back analysis: monitoring insulation is by internal thermometer feelings
Condition；It is obtained by way of calling dam management internal system information: dam construction temperature, dam dimension information, dam construction
Temperature information, wind speed information and the solar radiation information that time, dam are faced；Using FEM calculation, temperature field finite element
Discrete rear programming according to the following formula is calculated to realize:Boundary condition: Wherein,Partial differential operation is represented, τ is the time (s), and λ is thermal coefficient, and α is to lead
Warm coefficient, θ are adiabatic temperature rise,For First Boundary Condition temperature, e is the heat flow given on boundary, and β is borderline puts
Hot coefficient, TaFor the environment temperature in the case of free convection.
The step of determining surface coefficient of heat transfer includes: that the first of default surface coefficient of heat transfer sets value β0, simulation measuring and calculating test point
Initial calculation temperature；First time error amount is calculated according to the following formula,
Wherein, Teer(1)For first time error amount, unit is degree Celsius；N is the time total step number divided in calculating process；Kb(i0)For table
Face coefficient of heat transfer β0Under the conditions of, time step is the calculating temperature of measuring point when i is walked, and unit is degree Celsius；Kc(i)It is i step for time step
When measuring point actual temperature, unit be degree Celsius；M subsurface coefficient of heat transfer, β are calculated according to the following formulam=β0+Δβ(m-
1), wherein βmFor m subsurface coefficient of heat transfer, Δ β is default increment value, and m is more than or equal to 2；Simulation measuring and calculating test point the m times
Temperature is calculated, and calculates the m times error amount according to the following formula,Wherein,
Kb(im)For surface coefficient of heat transfer βmUnder the conditions of, time step is the calculating temperature of measuring point when i is walked；Until Teer(m)<Teer(m+1), then table
Face coefficient of heat transfer β=βm.Such as: default the first of surface coefficient of heat transfer sets value β0For 100kJ/ (m2H DEG C), Δ β is default passs
Increment is chosen for 30kJ/ (m2H DEG C), then the surface coefficient of heat transfer being calculated is β=100+30 (m-1) kJ/ (m2·h·
℃)。
Further, the step of determining surface coefficient of heat transfer includes: when dam surface is without insulation quilt, according to the following formula
Gauging surface coefficient of heat transfer, β=523.2+324.72va, wherein vaFor dam surface wind speed, unit m/s.
Further, the step of calculating dam surface stress includes: to be solved with method of addition, time τ is divided into a series of
Period: Δ τ1、Δτ2......Δτn, in period Δ τnThe strain increment of interior generation are as follows:Wherein:It is answered for elasticity
Become increment；For creep strain increment；For temperature strain increment；For autogenous volumetric deformation increment；
For drying shrinkage strain increment.Using FInite Element, carries out whole unit and integrates, whole machine balancing equation can be obtained:
[K]{Δδn}={ Δ Pn}L+{ΔPn}C+{ΔPn}T+{ΔPn}0+{ΔPn}S, in which: [K] is overall stiffness square
Battle array；{ΔPn}LFor nodal load increment caused by external load；{ΔPn}CNodal load increment caused by creep；{ΔPn}TFor
Nodal load increment caused by temperature；{ΔPn}0For nodal load increment caused by autogenous volumetric deformation；{ΔPn}SDraw for drying shrinkage
The nodal load increment risen.Find out displacement increment { the Δ δ of each nodenAfter, according to Δ σn=[D] [B] { Δ δnCalculate
To stress increment Δ σn, wherein [B] is displacement strain matrix, [D] is stress-strain matrix, cumulative to obtain each unit τnMoment
Stress σn=∑ { Δ σn}。
Further, the step of judging safety of dam body situation includes: according to formulaCalculate safety of dam body coefficient
Kf, wherein σ is the sum of the temperature stress that the various temperature difference generate, unit MPa；εpValue is drawn high for the concrete limit；EcFor coagulation
Native elasticity modulus, unit MPa.For safety coefficient 1.5 the above are safe condition, 1.3-1.5 will affect quality, and 1.3 or less deposit
In cracking risk, safety coefficient has biggish cracking risk below 1.0.
Further, if Kf< 1.5, and dam surface is laid with the insulation quilt of moisture state, then increases the number of plies of insulation quilt；
If Kf>=1.5, dam surface is then determined as dam body without cracking risk without insulation quilt.
When dam surface is in GK1: it is laid with the insulation quilt of moisture state, GK2: heat preservation is laid bad or GK3: it is laid with
When lower part has any in these three states of the insulation quilt of ponding, if Kf(q)>=1.5, and Kf(q+1)When < 1.5, then by dam surface
State is configured to GKq；Wherein, q is that the type of dam surface state is numbered, GKqThe dam surface state for being q for number, Kf(q)For
The corresponding safety coefficient of q kind dam surface state.The Insulation of dam surface, nothing are reasonably adjusted according to safety of dam body situation
It need to crack to dam surface and reinforce heat preservation, and then trial and error cost be not present, and can avoid heat preservation and excessively generate higher cost.
In addition, the interim face stress analysis method of concrete dam body further include: calculate cold wave according to prediction cold wave temperature simulation
The temperature stress of period；According to temperature stress calculation safety of dam body COEFFICIENT Kf；If safety coefficient KfLess than 1.5, then early warning is issued,
And reinforce the heat preservation of dam body.Wherein, a temperature record and solar radiation data are transferred within every three minutes, using cold wave early warning temperature
As prediction temperature, and calculate safety coefficient K during cold wave continuesfMinimum value, if there are safety coefficient Ks during cold wavefIt is small
In 1.5 the case where, then dam heating insulation measure is further strengthened, is generated out to avoid dam surface during cold wave because of local temperature difference
It splits.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of interim face stress analysis method of concrete dam body characterized by comprising
Determine the default keeping warm mode of dam surface；
Determine surface coefficient of heat transfer；
Concrete thermal field is calculated according to surface coefficient of heat transfer, and the temperature that calculating temperature difference generates is simulated according to concrete thermal field and is answered
Power；
Judge safety of dam body situation, and dam surface Insulation is adjusted.
2. the interim face stress analysis method of concrete dam body according to claim 1, which is characterized in that the determining dam body
The step of default keeping warm mode on surface includes:
According to dam surface state, dam surface is divided into following type:
GK1: it is laid with the insulation quilt of moisture state；
GK2: heat preservation is laid bad；
GK3: it is laid with the insulation quilt that ponding is arranged at lower part；
Dam surface is without insulation quilt.
3. the interim face stress analysis method of concrete dam body according to claim 2, which is characterized in that in the dam body table
Under conditions of face is without insulation quilt, whether detection dam surface wind speed is greater than default wind speed；
If the dam surface wind speed is less than or equal to the default wind speed, the type of the dam surface is GK4: the first kind without
Insulation quilt state；
If the dam surface wind speed is greater than the default wind speed, the type of the dam surface is GK5: the second class is without heat preservation
By state.
4. the interim face stress analysis method of concrete dam body according to claim 1, which is characterized in that the concrete dam
The interim face stress analysis method of body further include:
Environmental information is detected by interval of preset time, the environmental information includes temperature data and dam surface wind speed；
The preset time is 2min~5min.
5. the interim face stress analysis method of concrete dam body according to claim 1, which is characterized in that the determining surface
The step of coefficient of heat transfer includes:
Default the first of surface coefficient of heat transfer sets value β0, the initial calculation temperature of simulation measuring and calculating test point；
First time error amount is calculated according to the following formula,Wherein, Teer(1)
For first time error amount, unit is degree Celsius；N is the time total step number divided in calculating process；Kb(i0)For surface coefficient of heat transfer
β0Under the conditions of, time step is the calculating temperature of measuring point when i is walked, and unit is degree Celsius；Kc(i)It is the reality of measuring point when i is walked for time step
Border temperature, unit are degree Celsius；
M subsurface coefficient of heat transfer, β are calculated according to the following formulam=β0+ Δ β (m-1), wherein βmFor the heat dissipation of m subsurface
Coefficient, Δ β are default increment value, and m is more than or equal to 2；
Simulation measuring and calculating the m times calculating temperature of test point, and the m times error amount is calculated according to the following formula,Wherein, Kb(im)For surface coefficient of heat transfer βmUnder the conditions of, time step is i step
When measuring point calculating temperature；
Until Teer(m)<Teer(m+1), then surface coefficient of heat transfer β=βm。
6. the interim face stress analysis method of concrete dam body according to claim 1, which is characterized in that the determining surface
The step of coefficient of heat transfer includes:
When the dam surface is without insulation quilt, gauging surface coefficient of heat transfer according to the following formula, β=523.2+324.72va,
Middle vaFor dam surface wind speed, unit m/s.
7. the interim face stress analysis method of concrete dam body according to claim 3, which is characterized in that the judgement dam body
The step of safe condition includes:
According to formulaCalculate safety of dam body COEFFICIENT Kf, wherein σ is the sum of the temperature stress that the various temperature difference generate, single
Position is MPa；εpValue is drawn high for the concrete limit；EcFor modulus of elasticity of concrete, unit MPa.
8. the interim face stress analysis method of concrete dam body according to claim 7, which is characterized in that
If Kf< 1.5, and dam surface is laid with the insulation quilt of moisture state, then increases the number of plies of the insulation quilt；
If Kf>=1.5, dam surface is then determined as dam body without cracking risk without insulation quilt.
9. the interim face stress analysis method of concrete dam body according to claim 7, which is characterized in that if Kf(q)>=1.5,
And Kf(q+1)When < 1.5, then GK is configured by the dam surface stateq；
Wherein, q is that the type of the dam surface state is numbered, GKqThe dam surface state for being q for number, Kf(q)For q kind
The corresponding safety coefficient of dam surface state.
10. the interim face stress analysis method of concrete dam body according to claim 7, which is characterized in that the concrete
The interim face stress analysis method of dam body further include:
The temperature stress during calculating cold wave according to prediction cold wave temperature simulation；
According to safety of dam body COEFFICIENT K described in the temperature stress calculationf；
If the safety coefficient KfLess than 1.5, then early warning is issued, and reinforces the heat preservation of the dam body.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115615488A (en) * | 2022-10-14 | 2023-01-17 | 中国科学院西北生态环境资源研究院 | Cold region reservoir dam safety monitoring system and method |
| CN117232671A (en) * | 2023-11-13 | 2023-12-15 | 江苏莱士敦建筑科技有限公司 | Temperature measurement method and system for mass concrete temperature field |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556597A (en) * | 2013-10-24 | 2014-02-05 | 中国水利水电科学研究院 | Mass concrete surface cracking risk early warning, intervening and decision-making system |
| CN106677115A (en) * | 2017-01-22 | 2017-05-17 | 中国水利水电科学研究院 | Intelligent heat preservation method of water film of concrete dam downstream surface |
-
2019
- 2019-07-05 CN CN201910608912.XA patent/CN110263490B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556597A (en) * | 2013-10-24 | 2014-02-05 | 中国水利水电科学研究院 | Mass concrete surface cracking risk early warning, intervening and decision-making system |
| CN106677115A (en) * | 2017-01-22 | 2017-05-17 | 中国水利水电科学研究院 | Intelligent heat preservation method of water film of concrete dam downstream surface |
Non-Patent Citations (4)
| Title |
|---|
| 李松辉等: "高碾压混凝土坝裂缝成因及防治措施研究", 《水利水电技术》 * |
| 李松辉等: "高碾压混凝土坝裂缝成因及防治措施研究", 《水利水电技术》, no. 01, 20 January 2017 (2017-01-20) * |
| 郑晓晖 等: "基于光纤测温的浇筑仓顶面保温被保温效果反馈分析", 《中国农村水利水电》 * |
| 郑晓晖 等: "基于光纤测温的浇筑仓顶面保温被保温效果反馈分析", 《中国农村水利水电》, no. 08, 15 August 2013 (2013-08-15), pages 112 - 115 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115615488A (en) * | 2022-10-14 | 2023-01-17 | 中国科学院西北生态环境资源研究院 | Cold region reservoir dam safety monitoring system and method |
| CN115615488B (en) * | 2022-10-14 | 2024-01-23 | 中国科学院西北生态环境资源研究院 | Cold region reservoir dam safety monitoring system and method |
| CN117232671A (en) * | 2023-11-13 | 2023-12-15 | 江苏莱士敦建筑科技有限公司 | Temperature measurement method and system for mass concrete temperature field |
| CN117232671B (en) * | 2023-11-13 | 2024-01-30 | 江苏莱士敦建筑科技有限公司 | Temperature measurement method and system for mass concrete temperature field |
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