CN106980707A - What a kind of steep wall seawall trend was inverted chooses stream interface Parameters design - Google Patents

What a kind of steep wall seawall trend was inverted chooses stream interface Parameters design Download PDF

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CN106980707A
CN106980707A CN201710099202.XA CN201710099202A CN106980707A CN 106980707 A CN106980707 A CN 106980707A CN 201710099202 A CN201710099202 A CN 201710099202A CN 106980707 A CN106980707 A CN 106980707A
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stream
section
seawall
trend
choose
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CN106980707B (en
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陈秀良
倪兴也
潘存鸿
吴辉
李倩
李春贵
骆勇军
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Zhejiang Institute of Hydraulics and Estuary
Zhejiang Guangchuan Engineering Consulting Co Ltd
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Zhejiang Institute of Hydraulics and Estuary
Zhejiang Guangchuan Engineering Consulting Co Ltd
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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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains

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  • Physics & Mathematics (AREA)
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  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
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Abstract

Stream interface Parameters design is chosen the present invention relates to a kind of reversion of steep wall seawall trend, is comprised the following steps：(1) stream interface general layout design is chosen in seawall；(2) diversion section is designed；(3) arc section is designed；(4) stream section parameter designing is chosen：Analysis including choosing stream segment length Lt, choosing stream angle θ and choose stream section initial point position is determined.The determination of SPH numerical simulations can be reapplied first using formula analysis primary election is simplified by choosing stream section parameter.Reduced mechanical model：The present invention chooses stream interface Parameters design for a kind of steep wall seawall " arc section chooses stream section " combination, provides basic theory effectively to solve the steep wall seawall problem that safety safeguards with tidal bore landscape of seeing tides and supports and computational methods.

Description

What a kind of steep wall seawall trend was inverted chooses stream interface Parameters design
Technical field
Stream interface Parameters design is chosen the present invention relates to a kind of reversion of steep wall seawall trend, belongs to hydraulic engineering and takes precautions against natural calamities Mitigation technical field.
Background technology
Trend reversion is a kind of method of the steep indirect dissipation and scouring in wall seawall.For the mechanism of action, current steep wall The dissipation and scouring method in seawall can be divided into the class method of direct-type, indirect type etc. two.Seawall direct-type dissipation and scouring method is mainly By setting heteromorphic block before the pool or building component or the structures or tower structure such as submerged breakwater, directly to cut down tide Nighttide Wave energy, to control or reduce more unrestrained height, so as to realize the effect of seawall dissipation and scouring；Seawall indirect type dissipation and scouring Seawall Ying Chao faces are mainly designed to circular arc type structure by method, according to by it is past, return the control of 180 ° of tide wave phase difference Principle, to reduce the wave intensity after stack combinations, so as to realize the purpose of seawall dissipation and scouring.But for tidal bore trend Speech, above two method all can not combination that is economic, effectively realizing trend reversion and tidal bore height construction.
The content of the invention
For the above-mentioned technical problem of prior art, it is an object of the invention to provide a kind of reversion of steep wall seawall trend Stream interface Parameters design is chosen, can effectively realize that trend is inverted, effectively can build and safeguard again tidal bore landscape.Choose stream interface in seawall It is general by arc section, choose stream section and constitute.When water level is relatively low, lower end can be set up by " following current section, slope section " combined water conservancy diversion Section, to guide trend and the smooth-going of seawall upstream face to be connected.
To reach above-mentioned purpose, the present invention is achieved by the following technical solutions：
What a kind of steep wall seawall trend was inverted chooses stream interface Parameters design, comprises the following steps：
(1) stream interface general layout design is chosen in seawall；
(2) diversion section is designed；
(3) arc section is designed；
(4) stream section parameter designing is chosen：Stream angle θ is chosen including choosing stream section, choose stream segment length LtAnd choose stream section initial point position Analysis is determined；
Consider that wind speed, wind direction choose stream influence on seawall and choose stream distance controlling value L in the presence of a minimumf, then stream distance is chosen full Sufficient L≤Lf, so as to show that one allows maximum to choose stream angle θ max；Tidal bore landscape maintenance requirement is met to choose in the presence of a minimum trend High controlling value Hf, then choose stream height and meet H≤Hf, so as to show that one allows minimum to choose stream angle θ min；Therefore, choosing stream interface design Stream angle is chosen to choose in the range of θ min ≦ θ≤θ max；
Tidal bore chooses stream height H, chooses stream after trend reversion is apart from L reduced mechanical model：
In formula：
θ is that trend chooses inceptive direction and horizontal angle during from anti-camber structure, and unit is degree；
H is rising after trend reversion, and its apogee distance chooses the height of stream section bottom, and unit is m；
L is to rise after trend is inverted, drop down onto the horizontal range chosen when flowing section bottom elevation again, and unit is m；
υ is the strength of current perpendicular to anti-camber seawall, and unit is m/s；
LfIt is that minimum is chosen away from controlling value for the influence that consideration wind speed, wind direction are more unrestrained to seawall；
HfIt is that minimum trend chooses high controlling value for the angle safeguarded based on tidal bore landscape；
K1、K2Stream height is chosen for tidal bore, stream is chosen apart from reduction coefficient, is 0.95-0.99 during primary Calculation,
G is gravity acceleration value, takes 9.81m/s2；
LtMinimum value can use 1-1.5m, choose stream section initial point position as low as possible when condition is permitted.
The step (1) is according to the height in steep wall seawall, inclination angle, suppressing layer elevation and width information and pool pin beach Painting face, the gradient, the trend layer characteristic parameter such as the depth of water and flow velocity, according to the principle of " tidal bore trend is not more unrestrained, orientation determines tall stream ", Consider diversion section, arc section and choose the plan of establishment of stream section, primarily determine that and choose stream segment length, choose stream angle and choose stream section starting endpoint Position；On this basis, SPH numerical simulation analysis is further carried out, it is determined that choosing stream interface parameter.
In the step (2), be below or near to the seawall of suppressing layer for initial water level, " diversion section " by " following current section " with " slope section " is constituted, and " following current section " uses single circular arc, and arc radius is 3-5m, and " following current section " is flat with suppressing layer before the pool respectively Platform, " slope section " are tangent；" slope section " basis " following current section " determines whether to set the need for " arc section " smooth-going being connected, if If setting, the one end of " slope section " and " following current section " are tangent, and the other end and " arc section " are tangent.
Single circular arc or multistage inscribe circular arc composition be set in the step (3), its head and the tail two ends respectively with " diversion section ", " choosing stream section " is tangent, and arc radius is the 1/4-1/2 of seawall wall height.
Choose stream section in the step (4) to be made up of for θ oblique line section inclination angle, its lower end and arc section top are tangent, pass through Simplify formula primary Calculation, and combine SPH numerical simulation analysis, rationally determine to choose stream segment length Lt, choose stream angle θ and choose stream section to rise Initial point position.
Beneficial effects of the present invention are as follows：
What the steep wall seawall trend that the present invention is provided was inverted chooses stream interface Parameters design, can both realize perpendicular to seawall Tidal bore trend effective reversion, enhancement engineering security and can see tides security；Stream angle is chosen by the way that design is specific simultaneously, can Reach and build and safeguard the effect of tidal bore landscape, be that stream interface parameter is chosen in a kind of steep wall seawall " arc section-choose stream section " combination Design method, basic theory support and meter are provided effectively to solve the steep wall seawall problem that safety and tidal bore landscape safeguard of seeing tides Calculation method.
Brief description of the drawings
Fig. 1 is the angle and length schematic diagram corniced；
Fig. 2 is to choose stream distance and choose stream high-level schematic；
Fig. 3 is to choose stream angle θ when correspondence tidal current speed is 6m/s and choose stream height H, choose graph of a relation of the stream apart from L.
Embodiment
With reference to specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to This.
In the present invention choose stream interface it is general by arc section, choose stream section and constitute, when water level is relatively low, its lower end can set up " following current The combined diversion section of section and/or slope section ".The present invention can effectively realize that trend is inverted, and can effectively build and be gushed with maintenance again Damp landscape chooses stream interface Parameters design, comprises the following steps：
(1) stream interface general layout design is chosen in seawall：Mainly according to the height in steep wall seawall, inclination angle and suppression floor height The Back ground Informations such as journey, width, and pool pin beach face, the gradient and the trend layer depth of water, the characteristic parameter such as flow velocity, according to " tidal bore tide Stream is not more unrestrained, the fixed tall stream of orientation " principle, consider diversion section (following current section, slope section), arc section, choose and flow setting for section Scheme is put, while the reduced mechanical model provided using this patent, primarily determines that and choose stream segment length, choose stream angle and choose stream section starting The characteristic parameter scheme such as endpoint location.Then, further carry out SPH numerical simulation analysis preferably to choose stream interface parameter.
(2) diversion section is designed：The seawall of suppressing layer is below or near to for initial water level, " diversion section " mainly rushes trend Play a part of smooth-going during to seawall face to connect, can be made up of " following current section " with " slope section "." following current section " can use single circle Arc, arc radius can use 3-5m, tangent with suppressing layer platform, " slope section " before the pool respectively；" slope section " is according to " following current section " and " circle Determine whether to set the need for segmental arc " smooth-going linking, its one end and " following current section " are tangent, and the other end and " arc section " are tangent.
(3) arc section is designed：Arc section mainly plays trend smooth-going reversion.Can be by single circular arc or multistage inscribed circle Arc is constituted, and its head and the tail two ends is tangent with " diversion section ", " choose stream section " respectively, arc radius can use seawall wall height 1/4- 1/2。
(4) stream section parameter designing is chosen：Choose stream section and mainly play the flow direction after constrained load flow reversion, reach trend orientation, fixed height Choose the effect of stream.Choose stream section parameter designing true including the analysis for choosing stream segment length Lt, choosing stream angle θ and choosing stream section initial point position It is fixed, such as Fig. 1.
When tidal bore trend meets steep wall seawall " arc section-choose stream section " assorted structure surface, by arc section, stream section is chosen It can be formed under common guiding and significantly choose flow phenomenon, the impact overflow with larger kinetic energy is flowed apart from L with certain choosing, chooses stream height Spend H and successfully returned to water side, such as Fig. 2.
The present invention proposes " tidal bore trend is not more unrestrained ", the design principle of " the fixed tall stream of orientation ", and defines：LfTo consider wind The minimum that speed, wind direction choose stream influence on seawall chooses stream distance controlling value, then L≤L should be met by choosing stream distancef, so as to draw One allows maximum to choose stream angle θ max；HfHigh controlling value is chosen for a minimum trend based on tidal bore landscape maintenance requirement, then is chosen Stream height should meet H≤Hf, so as to show that one allows minimum to choose stream angle θ min.Therefore, choose stream interface design choose stream angle should be in θ Chosen in the range of min ≦ θ≤θ max.
Stream segment length L is chosen in order to further analyzetInfluence to choosing stream distance, height, present invention application SPH numerical simulations Method is analyzed, from analysis result, under the conditions of the base regime of same tidal current speed and starting water level, chooses stream angle θ To choose stream apart from L, choose stream height H and play main control actions (such as Fig. 3), and choose stream segment length LtTo choose stream apart from L, to choose stream high Spend H influences little.For the sake of safety, LtMinimum value takes 1-1.5m.
In design conditions, choose stream section starting point (i.e. point of contact of the arc section with choosing stream section) and be located at platform height, from circle Cambered surface seawall sets and chooses stream section, is not provided with choosing in the com-parison and analysis for flowing section and can draw, stream section starting point height is chosen in appropriate reduction, has The realization with choosing stream effect is inverted beneficial to trend；Stream section is chosen to top elevation identical, reduction trend is also beneficial to and gushes after height More unrestrained water.
Tidal bore chooses stream height H, chooses stream after trend reversion is apart from L reduced mechanical models：
In formula：
θ-trend chooses inceptive direction and horizontal angle (degree) during from anti-camber structure；
Rise after H-trend reversion, its apogee distance chooses the height (m) of stream section bottom；
Rise after L-trend reversion, drop down onto the horizontal range (m) chosen when flowing section bottom elevation again；
The strength of current (m/s) of υ-perpendicular to anti-camber seawall；
Lf- consider that the minimum proposed in the influence more unrestrained to seawall of wind speed, wind direction, engineering is chosen away from controlling value.Typically Desirable 20m, specifically combines wind speed, the actual comprehensive determination of wind direction and seawall.
HfThe minimum trend proposed in-the angle safeguarded based on tidal bore landscape, engineering chooses high controlling value.General HfCan The former seawall in the position is taken to occur the 80% of tidal bore height.
K1、K2- tidal bore chooses stream height, chooses stream apart from reduction coefficient, and 0.95-0.99 is can use during primary Calculation.It should specifically tie The smoothness, integral rigidity and live wind speed, wind direction of anti-camber structure are closed, is proved and determined by numerical analysis.
G-gravity acceleration value, can use 9.81m/s2
Effective reversion of the tidal bore trend perpendicular to seawall can be achieved in the present invention, can enhancement engineering security and safety of seeing tides Property；Stream angle is chosen by the specific reversion of design simultaneously, the effect built with safeguarding tidal bore landscape is can reach.
Above-mentioned case study on implementation is only used for illustrating the inventive concept of the present invention, rather than to the limit of rights protection of the present invention Fixed, all changes for carrying out unsubstantiality to the present invention using this design all should fall into protection scope of the present invention.

Claims (5)

  1. What 1. a kind of steep wall seawall trend was inverted chooses stream interface Parameters design, it is characterised in that comprise the following steps：
    (1) stream interface general layout design is chosen in seawall；
    (2) diversion section is designed；
    (3) arc section is designed；
    (4) stream section parameter designing is chosen：Stream angle θ is chosen including choosing stream section, choose stream segment length LtAnd choose stream section initial point position analysis it is true It is fixed；
    Consider that wind speed, wind direction choose stream influence on seawall and choose stream distance controlling value L in the presence of a minimumf, then choose stream distance meet L≤ Lf, so as to show that one allows maximum to choose stream angle θ max；Meet tidal bore landscape maintenance requirement and choose high control in the presence of a minimum trend Value H processedf, then choose stream height and meet H≤Hf, so as to show that one allows minimum to choose stream angle θ min；Therefore, choosing stream interface design chooses stream Chosen in the range of θ min ≦ θ≤θ max at angle；
    Tidal bore chooses stream height H, chooses stream after trend reversion is apart from L reduced mechanical model：
    H = K 1 × υ 2 × Sin 2 θ 2 × g
    L = K 2 × υ 2 × S i n 2 θ 2 × g
    In formula：
    θ is that trend chooses inceptive direction and horizontal angle during from anti-camber structure, and unit is degree；
    H is rising after trend reversion, and its apogee distance chooses the height of stream section bottom, and unit is m；
    L is to rise after trend is inverted, drop down onto the horizontal range chosen when flowing section bottom elevation again, and unit is m；
    υ is the strength of current perpendicular to anti-camber seawall, and unit is m/s；
    LfIt is that minimum is chosen away from controlling value for the influence that consideration wind speed, wind direction are more unrestrained to seawall；
    HfIt is that minimum trend chooses high controlling value for the angle safeguarded based on tidal bore landscape；
    K1、K2Stream height is chosen for tidal bore, stream is chosen apart from reduction coefficient, is 0.95-0.99 during primary Calculation,
    G is gravity acceleration value, takes 9.81m/s2；
    LtMinimum value can use 1-1.5m, choose stream section initial point position as low as possible when condition is permitted.
  2. What 2. steep wall seawall trend was inverted as claimed in claim 1 chooses stream interface Parameters design, it is characterised in that：The step Suddenly (1) is according to the height in steep wall seawall, inclination angle, suppressing layer elevation and width information and pool pin beach face, the gradient, trend The layer depth of water and flow speed characteristic parameter, according to the principle of " tidal bore trend is not more unrestrained, orientation determines tall stream ", it is considered to diversion section, circular arc Section and the plan of establishment for choosing stream section, primarily determine that and choose stream segment length, choose stream angle and choose stream section starting endpoint position；It is basic herein On, further carry out SPH numerical simulation analysis, it is determined that choosing stream interface parameter.
  3. What 3. steep wall seawall trend was inverted as claimed in claim 1 chooses stream interface Parameters design, it is characterised in that：The step Suddenly in (2), the seawall of suppressing layer is below or near to for initial water level, " diversion section " is made up of " following current section " with " slope section ", " following current section " uses single circular arc, and arc radius is 3-5m, " following current section " respectively with suppressing layer platform, " slope section " phase before the pool Cut；" slope section " basis " following current section " determines whether to set the need for " arc section " smooth-going being connected, if set, " tiltedly One end of slope section " and " following current section " are tangent, and the other end and " arc section " are tangent.
  4. What 4. steep wall seawall trend was inverted as claimed in claim 1 chooses stream interface Parameters design, it is characterised in that：The step Single circular arc or multistage inscribe circular arc composition are set in (3) suddenly, and its head and the tail two ends is tangent with " diversion section ", " choosing stream section " respectively, Arc radius is the 1/4-1/2 of seawall wall height.
  5. What 5. steep wall seawall trend was inverted as claimed in claim 1 chooses stream interface Parameters design, it is characterised in that：The step Suddenly choose stream section in (4) to be made up of for θ oblique line section inclination angle, its lower end and arc section top are tangent, tentatively count by simplifying formula Calculate, and combine SPH numerical simulation analysis, rationally determine to choose stream segment length Lt, choose stream angle θ and choose stream section initial point position.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114218662A (en) * 2022-02-21 2022-03-22 浙江省水利河口研究院(浙江省海洋规划设计研究院) Design method for landscaping by head-up tide and surge

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100115958A (en) * 2009-04-21 2010-10-29 주식회사 삼안 Prediction method of slope failure to real-time in seashore revetment facilities
CN102191759B (en) * 2011-04-20 2013-06-05 河海大学 Novel breakwater and design method thereof
CN102943451B (en) * 2012-10-18 2015-07-01 河海大学 Determination method of maximal transverse flow of entrance channel of encircling-type breakwater
CN103544342B (en) * 2013-09-30 2017-01-04 上海交通大学苏北研究院 Nuclear power plant breakwater based on mixed model the most unrestrained shock simulation method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100115958A (en) * 2009-04-21 2010-10-29 주식회사 삼안 Prediction method of slope failure to real-time in seashore revetment facilities
CN102191759B (en) * 2011-04-20 2013-06-05 河海大学 Novel breakwater and design method thereof
CN102943451B (en) * 2012-10-18 2015-07-01 河海大学 Determination method of maximal transverse flow of entrance channel of encircling-type breakwater
CN103544342B (en) * 2013-09-30 2017-01-04 上海交通大学苏北研究院 Nuclear power plant breakwater based on mixed model the most unrestrained shock simulation method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114218662A (en) * 2022-02-21 2022-03-22 浙江省水利河口研究院(浙江省海洋规划设计研究院) Design method for landscaping by head-up tide and surge

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