CN106996097B - A kind of safe evaluation method of Arch Dam Structure - Google Patents
A kind of safe evaluation method of Arch Dam Structure Download PDFInfo
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- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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- E02B7/02—Fixed barrages
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Abstract
The present invention relates to a kind of safe evaluation methods of Arch Dam Structure, belong to arch dam field of engineering technology, comprising the following steps: the arch ring of arch dam is divided into several sequentially connected point of arch ring by a, along height of dam direction from top to bottom；B, using arch dam center line as boundary line, each point of arch ring is divided into left and right two parts；C, choosing each left side divides arch ring, the right side to divide arch ring arc length s, arch abutment thickness T corresponding to arch ring, dam foundation foundation deformation modulus R and the strong p of hydraulic pressure born for evaluation parameter；D, aforementioned four corresponding evaluation parameter group is combined into single macroscopic evaluation parameter；E, evaluation criterion N, f, structure evaluation are formulated, if left divide arch ring or the right value for dividing F corresponding to arch ring to be greater than the value of corresponding N, the structure is dangerous；If arch ring is divided on a left side or the right value for dividing F corresponding to arch ring is less than the value of corresponding N, structure safety.The present invention provides a kind of safe evaluation methods of the higher Arch Dam Structure of accuracy.
Description
Technical field
The present invention relates to a kind of safe evaluation methods of Arch Dam Structure, belong to arch dam field of engineering technology.
Background technique
It is safe and economically theme and pursuit eternal in hydroelectric development using hydraulic power potentials, arch dam is safety and warp
The advantageous dam type of Ji property, while being extremely complex dam type again, Arch Dam Structure safety how is quickly evaluated, Yi Ji
Economic Arch Dam is designed under the premise of safety, is that dam worker person makes great efforts to solve the problems, such as.
How in design early period, the reasonability and safety of Fast Evaluation layout of arch dam, dam worker are come from the data of macroscopic view
Member establishes some macro-indicators.The famous dam working platform man Lombardi proposition softness factor of Switzerland makees arch dam thickness empirical
Judgement, softness factor C=A2/ VH, wherein A --- the area of section in arch dam, V --- arch dam volume, H --- maximum height of dam.
The famous dam working platform person Zhu Baifang academician in China proposes with stress level coefficient and arch dam safety horizontal coefficients come preresearch estimates arch dam
Level of security.Stress level coefficient D=CH=A2/ V, level of security coefficient J=100R/D=100RV/A2, wherein R --- dam
The intensity of body and basis.There are also the ratios that expert proposes total hydraulic thrust and dam concrete side's amount, i.e. equivalent concrete comes anti-
Reflect the safe condition of arch dam.
The evaluation parameter that the safe evaluation method of existing arch dam is chosen has the following problems:
(1) in evaluation parameter in A, that is, arch dam section area, in the case of identical area, the shape in river valley may be U-shaped
Or V-arrangement, due to terrain differences, the load acted on arch dam is different, and not can reflect topographic features, obtained macroscopic view
Index directiveness is not strong；
(2) safe evaluation method of existing arch dam all incorporates dam concrete side amount V, and identical cubic amount of concrete V can
By taking vault subsidence section as an example, triangular cross-section can be used, trapezoidal cross-section can be used there are many in a manner of shape and configuration,
Rectangular section can be used, under different sections, with regard to different, corresponding strcture safety is different for the distribution of concrete；
(3) evaluation parameter chosen cannot reflect the architectural characteristic of controlling position, for specific elevation arch ring, effect
The size of load, the soft or hard degree on basis, cross dimensions of structure etc. are very important, and the evaluation parameter of selection fails specifically
Reflect these structure attributes.
In view of existing obtained macro-indicators there are the above limitation, be suitable only for doing some very rough statistical analysis and
Estimation, in design inconvenient grasp and operation not strong to the directiveness of layout of arch dam design.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of safe evaluation methods of the higher Arch Dam Structure of accuracy.
The technical solution adopted by the present invention to solve the technical problems is: a kind of safe evaluation method of Arch Dam Structure, packet
Include following steps:
A, along height of dam direction, the arch ring of arch dam is divided into several sequentially connected point of arch ring from top to bottom；
B, using arch dam center line as boundary line, each point of arch ring is divided into left and right two parts, being connected with the left bank dam foundation is
Arch ring is divided on a left side, and being connected with the right bank dam foundation is connected in the right side and divides arch ring；
C, choosing each left side divides arch ring, the right side to divide arch ring arc length s, arch abutment thickness T corresponding to arch ring, dam foundation foundation deformation mould
The amount R and strong p of hydraulic pressure born is evaluation parameter；
D, aforementioned four corresponding evaluation parameter group is combined into single macroscopic evaluation parameter according to formula F=sp/TR；
E, evaluation criterion N, N=- (M-0.5) are formulated2+ 0.5, M=E/H, wherein M is opposite height of dam, and E is to divide arch ring elevation
For plane to the distance of dam crest top surface, H is maximum height of dam；
F, structure evaluation, if left divide arch ring or the right value for dividing F corresponding to arch ring to be greater than the value of corresponding N, the structure
It is dangerous；If arch ring is divided on a left side or the right value for dividing F corresponding to arch ring is less than the value of corresponding N, structure safety.
The beneficial effects of the present invention are: main structure of the arch ring as arch dam, plays water blocking, it is proposed by the invention
The safe evaluation method of Arch Dam Structure, especially suitable for the layout design of new arch dam, using arch ring as the basis of assay,
Arch ring is divided into several sequentially connected point of arch ring from top to bottom first, arch ring is refined, then divides arch ring again to refinement
The secondary left side that is refined as divides arch ring, the right side to divide arch ring, chooses a left side and arch ring, the right side is divided to divide arch ring arc length s, arch abutment thickness T, institute corresponding to arch ring
The strong p of the hydraulic pressure of receiving and corresponding dam foundation foundation deformation modulus R, will be upper according still further to formula F=sp/TR as evaluation parameter
It states four corresponding evaluation parameter groups and is combined into single macroscopic evaluation parameter, make the parameter of arch ring and the parameter knot of the two sides dam foundation
It closes, obtains a comprehensive macroscopic evaluation parameter F, be then foundation according to the data to a large amount of built arch dams, formulate evaluation mark
Quasi- N, finally carries out structure evaluation according to the value of corresponding macroscopic evaluation parameter F and evaluation criterion N, and obtained arch dam safety is commented
The accuracy of valence is high.Especially when new layout of arch dam designs, divide arch ring in specific elevation, the strong p of the hydraulic pressure born, arch
Enclose arc length s be it is fixed, this divides the arrangement of arch ring to be then adjusted cloth between arch abutment thickness T and dam foundation foundation deformation modulus R
Meter is installed, specifies the direction of design adjustment, there is accurately directiveness to the design of new layout of arch dam.
Detailed description of the invention
Fig. 1 is the overlooking structure diagram of point arch ring；
Fig. 2 is the side structure schematic view of point arch ring；
Components, position and number in figure: a left side divides arch ring 1, the right side to divide arch ring 2, arch dam center line 3, the left bank dam foundation 4, right bank
The dam foundation 5, dam bottom 6.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
A kind of safe evaluation method of Arch Dam Structure of the present invention, comprising the following steps:
A, along height of dam direction, the arch ring of arch dam is divided into several sequentially connected point of arch ring from top to bottom, arch ring is thin
Change, then to the evaluation for dividing arch ring successively to carry out safety of refinement, it is accurately high to obtain evaluation index.According to the height of dam of arch dam
Fixed, preferably each dividing the height of arch ring is 40m.Main structure of the arch ring as arch dam, plays water blocking, whether is Arch Dam Structure
Securely and reliably that is to say whether arch ring is safe and reliable.
B, as shown in Figure 1 and Figure 2, it is boundary line with arch dam center line 3, each point of arch ring is divided into left and right two parts, with a left side
It is that arch ring 1 is divided on a left side that the bank dam foundation 4, which is connected, and being connected with the right bank dam foundation 5 is connected in the right side and divides arch ring 2, each point of arch ring is divided into left and right
Two parts further refine arch ring.Since the structure of the left bank dam foundation 4 of arch dam, the basement rock of the right bank dam foundation 5 is different, arch
Circle is also different with the contact situation of the left bank dam foundation 4, the right bank dam foundation 5, divides arch ring 1, the right side to divide arch ring so arch ring is refined as a left side
2。
C, choosing each left side divides arch ring 1, the right side to divide arch ring arc length s, arch abutment thickness T, dam foundation foundation deformation corresponding to arch ring 2
The modulus R and strong p of the hydraulic pressure born is evaluation parameter.The strong p of hydraulic pressure is the main external load that arch dam is born, and arch dam passes through arch
The strong p of hydraulic pressure is passed to the left bank dam foundation 4, the right bank dam foundation 5 by circle.In the case where landform determines, the arch ring arc length s of arch dam, held
In the case that the strong p of the hydraulic pressure received is certain, the safety of arch dam by the left bank dam foundation 4, the right bank dam foundation 5 arch abutment range basement rock
Non-deformability determine that and the product of arch abutment thickness T and dam foundation foundation deformation modulus R exactly reflects the base of arch abutment range
The non-deformability of plinth rock.Arch ring 1, the right side is divided to divide arch ring arc length s, arch abutment thickness corresponding to arch ring 2 so choosing each left side
T, the dam foundation foundation deformation modulus R and strong p of the hydraulic pressure born is evaluation parameter, can accurately show out the safety of arch dam.
Further, arch ring arc length s, arch abutment thickness T, dam foundation foundation deformation modulus R and the strong p of hydraulic pressure these data born are
All know in shape design of arch dams arrangement, the accuracy for obtaining data is high.
D, make the parameter of arch ring in conjunction with the parameter of the two sides dam foundation, it will be aforementioned four corresponding according to formula F=sp/TR
Evaluation parameter group is combined into single macroscopic evaluation parameter, is by structure stress and 4 parameter combinations of arch abutment basis non-deformability
Dimensionless group.
E, it is foundation according to the data of a large amount of built arch dams, formulates evaluation criterion N, N=- (M-0.5)2+ 0.5, M=E/H,
Wherein M is opposite height of dam, and E is distance of point arch ring elevation plane to dam crest top surface, and H is maximum height of dam.The value of evaluation criterion N with
The value of opposite height of dam M has relationship, and the dam crest of arch dam is by traffic requirement and detailing requiments, and thickness is higher than structure stress requirement, top
The strong p of the hydraulic pressure born in portion is lower, the bottom of arch dam close to basis, beam to effect it is very strong, the effect of arch is not obvious, edge
Height of dam direction is the strongest place of effect of arch in the middle part of arch dam, using the middle part of arch dam as basic point, upwardly or downwardly, arch
Effect successively weakens, and evaluation criterion N is consistent with the actual conditions of arch dam.
F, structure evaluation, if left divide arch ring 1 or the right value for dividing F corresponding to arch ring 2 to be less than the value of corresponding N, the knot
Structure safety；If a left side divides arch ring 1 or the right value for dividing F corresponding to arch ring 2 to be greater than the value of corresponding N, the structure is dangerous.To knot
Unsafe point of arch ring of structure should reinforce dam foundation foundation deformation modulus R, to place arch ring position by increasing its arch abutment thickness T
Soft rock mass or Geological Defects increase the range of processing, make the value that treated divides the value of F corresponding to arch ring to be less than corresponding N.
Main structure of the arch ring as arch dam plays water blocking, the safety evaluation of Arch Dam Structure proposed by the invention
Method, especially suitable for the layout design of new arch dam, using arch ring as the basis of assay, first from top to bottom by arch ring
It is divided into several sequentially connected point of arch ring, arch ring is refined, then refinement is divided arch ring to be refined as a left side again to divide arch ring, the right side
Divide arch ring, chooses a left side and arch ring, the right side is divided to divide arch ring arc length s, arch abutment thickness T corresponding to arch ring, the strong p of hydraulic pressure born and institute
Corresponding dam foundation foundation deformation modulus R is as evaluation parameter, according still further to formula F=sp/TR by aforementioned four corresponding evaluation
Parameter combination is single macroscopic evaluation parameter, makes the parameter of arch ring in conjunction with the parameter of the two sides dam foundation, obtain one it is comprehensive macro
Evaluation parameter F is seen, is then foundation according to the data to a large amount of built arch dams, evaluation criterion N is formulated, finally according to corresponding macro
The value for seeing evaluation parameter F and evaluation criterion N carries out structure evaluation, and the accuracy of obtained arch dam safety evaluation is high.Especially
New layout of arch dam design when, divide arch ring in specific elevation, the strong p of the hydraulic pressure born, arch ring arc length s be it is fixed, should
Divide the arrangement of arch ring to be then adjusted layout design between arch abutment thickness T and dam foundation foundation deformation modulus R, specifies that design is adjusted
Whole direction has accurately directiveness to the design of new layout of arch dam.
Embodiment 1
The arch ring of arch dam is divided into several from top to bottom and is sequentially connected by certain engineering maximum height of dam 240m along height of dam direction
Divide arch ring, each left side divide arch ring, it is right divide arch ring arc length s, arch abutment thickness T corresponding to arch ring, dam foundation foundation deformation modulus R with
And the parameter of the strong p of hydraulic pressure born is as shown in Table 1:
Table one
Aforementioned four corresponding evaluation parameter group is combined into single macroscopic evaluation parameter according to formula F=sp/TR, is formulated
Evaluation criterion N, N=- (M-0.5)2+ 0.5, M=E/H, as shown in Table 2:
Table two
From two kinds of table as can be seen that in addition to the right side of right bank elevation 1090m divides the value of the corresponding F of arch ring to be less than corresponding N
Value, structure is dangerous outer, and the value of the correspondence F of remaining elevation is less than the value of corresponding N, illustrates structure safety.Right bank elevation
The right side of 1090m divides arch ring to increase arch abutment thickness T, reinforces dam foundation foundation deformation modulus R, so that the value of corresponding F be made to be less than corresponding N
Value, make the structure reach safety.
Claims (1)
1. a kind of safe evaluation method of Arch Dam Structure, it is characterised in that: the following steps are included:
A, along height of dam direction, the arch ring of arch dam is divided into several sequentially connected point of arch ring from top to bottom；
B, each point of arch ring is divided into left and right two parts, is connected with the left bank dam foundation (4) for boundary line with arch dam center line (3)
Divide arch ring (1) for a left side, being connected with the right bank dam foundation (5) is connected in the right side and divides arch ring (2)；
C, choosing each left side divides arch ring (1), the right side to divide arch ring arc length s, arch abutment thickness T, dam foundation foundation deformation corresponding to arch ring (2)
The modulus R and strong p of the hydraulic pressure born is evaluation parameter；
D, aforementioned four corresponding evaluation parameter group is combined into single macroscopic evaluation parameter according to formula F=sp/TR；
E, evaluation criterion N, N=- (M-0.5) are formulated2+ 0.5, M=E/H, wherein M is opposite height of dam, and E is to divide arch ring elevation plane
To the distance of dam crest top surface, H is maximum height of dam；
F, structure evaluation, if the value that a left side divides arch ring (1) or the right side that the value of F corresponding to arch ring (2) is divided to be greater than corresponding N, the knot
Structure is dangerous；If the value that a left side divides arch ring (1) or the right side that the value of F corresponding to arch ring (2) is divided to be less than corresponding N, structure safety.
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| CN110135107B (en) * | 2019-05-29 | 2022-08-05 | 中国电建集团成都勘测设计研究院有限公司 | Method for evaluating topographic and geological conditions of pseudo-built arch dam site |
| CN110263450B (en) * | 2019-06-25 | 2022-10-04 | 中国电建集团成都勘测设计研究院有限公司 | General arch dam body expression method |
| CN110438948A (en) * | 2019-08-19 | 2019-11-12 | 北京航空航天大学 | A kind of new method for evaluating arch dam slope monolith parting effect |
| CN110532694B (en) * | 2019-08-29 | 2023-02-28 | 四川大学 | Arch dam safety evaluation method based on geomechanical model comprehensive method test |
| CN111832918B (en) * | 2020-06-30 | 2024-01-09 | 中国电建集团西北勘测设计研究院有限公司 | M method for evaluating safety and economical efficiency of arch dam |
| CN112395799B (en) * | 2020-11-30 | 2023-03-10 | 中国电建集团成都勘测设计研究院有限公司 | Method for evaluating reasonability of arch dam body design and working state in operation period |
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| SU1076515A1 (en) * | 1981-12-09 | 1984-02-29 | Natorkhin Boris A | Method of modelling a hydraulic structure |
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