CN106522158A - Floating breakwater with multiple columns of fence type wave stopping insertion plates and design method of floating breakwater - Google Patents

Floating breakwater with multiple columns of fence type wave stopping insertion plates and design method of floating breakwater Download PDF

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Publication number
CN106522158A
CN106522158A CN201611116038.0A CN201611116038A CN106522158A CN 106522158 A CN106522158 A CN 106522158A CN 201611116038 A CN201611116038 A CN 201611116038A CN 106522158 A CN106522158 A CN 106522158A
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wave
breakwater
buoyancy tank
manger board
floating
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CN106522158B (en
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何方
冷杰
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Zhejiang University ZJU
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Zhejiang University ZJU
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B3/00Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/06Moles; Piers; Quay walls; Groynes; Breakwaters Wave dissipating walls; Quay equipment
    • E02B3/062Constructions floating in operational condition, e.g. breakwaters or wave dissipating walls

Abstract

The invention discloses a floating breakwater with multiple columns of fence type wave stopping insertion plates and a design method of the floating breakwater, and belongs to the field of offshore engineering. The floating breakwater is composed of a plurality of breakwater units, a wave stopping wall is distributed on the wave facing side of the upper portion of a rectangular floating box of each breakwater unit, a plurality of T-shaped installation holes are reserved in the middle of each rectangular floating box, and the multiple columns of insertion type wave stopping plates are formed through embedding, fixing and joining. Each rectangular floating box is connected to a sinking block through an anchor cable and is then anchored in a design zone, and the breakwater units are in meshed connection through hooks. According to the floating breakwater, the water limiting effect is formed by the multiple columns of wave stopping plates, water bodies around the wave stopping insertion plates are used for increasing the additional mass of the overall floating breakwater, the inertia and the overall stability of the floating breakwater are improved, and motion of floating bodies is not limited by anchoring only; and meanwhile, the fence type wave stopping insertion plates give consideration to energy transformation of reflection energy dissipation and turbulent fluctuation energy dissipation on the aspect of energy dissipation, and the wave dissipation effect of the breakwater can be obviously improved.

Description

A kind of floating breakwater and its method for designing that unrestrained plate is kept off with multiple row fence type
Technical field
The present invention relates to a kind of new floating breakwater and its method for designing, and in particular to a kind of to keep off with multiple row fence type The floating breakwater and its method for designing of unrestrained plate.
Background technology
Breakwater primarily serves reduction wave transmission coefficient as a kind of traditional engineering structure, improves basin pool steady Condition, shielding specify the effect in waters.Floating breakwater builds low cost because of which, is not limited by seabottom geology condition, builds fast Speed, the features such as facilitating of removing are being widely used compared with deepwater regions.
The floating breakwater of rectangle floating box type has become institute in engineering because of its simple structure the features such as highly reliable, easy to maintain Using the primary structure pattern of floating breakwater.The floating breakwater of rectangle floating box type is generally by rectangle floating box and mooring system group Into, in practical engineering application, the reliability of mooring system often becomes the floating breakwater life-time service of restriction rectangle floating box type can By the bottleneck sexual factor of property.Simultaneously because rectangle floating box type breakwater wave eliminating mode is to reflect based on wave energy, floating box drinking water is deeper, Wave wave absorbing effect is better, but anchor-hold also accordingly can increase, and correspondingly rectangle buoyancy tank section cost and anchored structure cost will It is substantially improved.
In the published Patents with regard to the floating breakwater of rectangle floating box type, not yet there is concern to increase using constraint water body Plus floating breakwater entirety additional mass carries out keeping off the technical scheme of unrestrained wave absorption improving floating breakwater mooring stability, because This, the floating design of breakwater of rectangle floating box type is contemplated that, makes full use of institute Shu Shuiti to increase floating Breakwater additional mass, reduces buoyancy tank cross dimensions and reduces mooring system mooring forces, make floating design of breakwater under equal operating mode The characteristics of taking into account good wave absorbing effect and economy.
The content of the invention
Instant invention overcomes deficiency of the prior art, there is provided a kind of novel rectangular floating box type floats breakwater, and which is main Purpose is to provide a kind of floating breakwater that unrestrained plate is kept off with multiple row fence type.It is a kind of to keep off unrestrained plate with multiple row fence type Floating breakwater, its rectangle buoyancy tank plays buoyancy supporting role, using buoyancy tank lower disposed multiple row manger board and manger board it Between the beam water effect that formed of water body, make water body between manger board constitute the overall extra additional mass of floating breakwater, Increase the additional mass of floating breakwater, strengthen floating breakwater stability in the large by water body inertia, reduce buoyancy tank section Size, reduces mooring system mooring forces, reduces construction costs.Go out from the angle for increasing structural stability and reduce engineering cost Send out, optimize structural shape, propose breakwater floating suitable for profundal zone novel rectangular floating box type.
To solve above-mentioned technical problem, the present invention is adopted the following technical scheme that:
A kind of floating breakwater that unrestrained plate is kept off with multiple row fence type, it is characterised in that by multiple breakwater structure units Constitute, single breakwater structure unit is made up of wave wall, rectangle buoyancy tank, manger board, support beam, anchor cable, sinker, each breakwater By linking up with connection between unit.Using rectangle buoyancy tank as agent structure, the rectangle buoyancy tank leads to the breakwater structure unit Cross anchor cable and be connected to sinker, overall anchoring is in design section;The board plug type manger board is flexibly can to select to install columns Structure, the manger board upper T shape structure reliably hang and are connected to rectangle buoyancy tank, when manger board columns is more, manger board it Between be provided with support beam and be connected with each other manger board, the overall rigidity of enhancing structure;The wave wall is arranged on rectangle buoyancy tank Portion heads sea side, is integrally connected with buoyancy tank overall structure;The hook is evenly arranged in single floating breakwater unit rectangle buoyancy tank Both sides, are mutually twisted linking.
Further, the rectangle buoyancy tank is discontinuity hollow, rectangular buoyancy tank, is prefabricated reinforced concrete structure, is reserved with The T-shaped for arranging board plug type manger board installs hole, and buoyancy tank bottom moves down can structural focus because arranging multiple row board plug type manger board, Reduce structural focus by arranging multiple row manger board, inside buoyancy tank, be not provided with then ballast layer, buoyancy tank length, highly combine At breakwater construction, wave and anchoring characteristic are built, and buoyancy tank height d takes d=(0.8~1.2) m, buoyancy tank width w take w=(8~ 16)m。
Further, the wave wall is arc wave wall, is arranged in rectangle buoyancy tank and heads sea side, it is overall with rectangle buoyancy tank just Property linking, wave wall should meet 0.5 H≤D≤H apart from D away from rectangle buoyancy tank lateral edges of heading sea, and wave wall height is from buoyancy tank jack-up Height S >=0.5 H, H are Design Wave, and wherein Design Wave adopts the return period for 50 years or 25 years, and wave height cumulative frequency is 13% wave height value.
Further, the manger board section is short rib T-shaped structure, and the rectangle buoyancy tank leaves T-shaped in centre position Reserved area, when manger board is not installed, breakwater body is the rectangle floating box structure for vertically leaving through hole;Manger board is being installed When, manger board upper T shape rest region is connected with rectangle buoyancy tank build-in, is suspended structure, can be built in breakwater overall structure If splicing installation after completion.Manger board be arranged to can flexible connected structure, can be according to the spirit of engineering ground wave action situation Adjustment living determines that manger board columns and portion do not set the number of openings formed during manger board.
Further, the manger board is fence type manger board, and manger board vertical extension is M=(1.0~1.15) H, Wherein H is Design Wave;Manger board open bore type be lateral opening, percent opening P combine breakwater construction at wave situations determine, P=5%~30%;Manger board columns combines the depth of water, wave situations at buoyancy tank size and breakwater construction and determines that columns N is full Sufficient N >=2, while manger board is allowed, and the hole reserved in rectangle buoyancy tank is spaced or hop is arranged, it is allowed to peace is reserved in rectangle buoyancy tank The T-shaped hole gap of dress manger board does not install manger board makes the reserved T-shaped hole gap of rectangle buoyancy tank form the hydrophilic for being provided with longitudinal hole Structure.
Further, when manger board columns is more, support beam should be set between manger board.The support distance between girders one Determining deviation arranges that spacing distance is A=(4~5) m, and support beam is arranged in manger board centre position not position with pores, the company of playing Connect manger board, the effect of enhancing structure integral rigidity and stability.
Further, the hook for being arranged by rectangle buoyancy tank both sides between the adjacent breakwater structure unit is connected Connect, the hook is flexible rope structure, it is allowed to which multivariant relative motion a little, multiple breakwater units pass through hook-shaped Into breakwater overall structure, the concrete deployment scenarios of breakwater should be determined with reference to the ground depth of water, wave situations is built.
Further, in sinker of the rectangle buoyancy tank by anchor cable system to seabed, using the lax formula anchoring of parallel type Mode completes the anchoring of rectangle buoyancy tank, and each rectangle buoyancy tank is anchored to anchor cable using T, T=1~3.
A kind of unrestrained process that disappears of the floating breakwater that unrestrained plate is kept off with multiple row fence type is as follows:
A. wave action is to breakwater, levee body reflection energy dissipating:Wave is acted on to breakwater from the incidence of off-lying sea side, rectangle buoyancy tank- The entirety that manger board-wave wall is constituted to be head sea and wavy hair occurs under structure function penetrates, and reflects energy dissipating using levee body;
B. wave action is to multiple row manger board, wave train Jing manger boards perforate transmission, turbulent fluctuation energy dissipating;Wave action is to multiple row manger board When, the part wave train Jing manger boards perforate transmission collide, blends, rubs, is streamed by water body, and chaotic Phenomena is notable, now for disorderly Dynamic energy dissipating.
C. multiple row manger board forms beam water effect, and between manger board, water body increases the additional mass of breakwater, and breakwater is integrally used to Property increase, breakwater and water body are monolithically fabricated equivalence extension breakwater, and under wave action, rectangle buoyancy tank-manger board is overall more Degree of freedom motion response is greatly reduced, and breakwater integral damping effect is significant, anchored structure stress are significantly reduced, breakwater Stability in the large is lifted.Breakwater is substantially reduced under equal operating mode and builds materials.
Further accordance with existing achievement in research, Wave energy has focused largely on water body top layer, from below water surface in 3 times of wave-height ranges Concentrate the energy of wave 90%, the present invention to take into full account characteristic distributions of the wave energy in water body, reduced material to greatest extent and use Amount, while the columns of manger board can be adjusted flexibly with reference to concrete operating mode, construction cost and maintenance cost are cheap, in existing floating box Breakwater wave dissipation structure energy dissipating sphere of action can be improved on the basis of mounted and breakwater wave eliminating result is improved.
Beneficial effects of the present invention:
1st, a kind of floating breakwater that unrestrained plate is kept off with multiple row fence type, rectangle buoyancy tank bottom are provided with multiple row manger board, In certain limit, the increase of manger board vertical extension under conditions of the presence of multiple row manger board integrally blocks wave in water with manger board The lifting of the obstruction effect that face travels below has the increasing of manger board length under conditions of positive correlation, the i.e. presence of multiple row manger board Plus, increase the local drinking water of breakwater unit under equal operating mode, increase obstruction effect of the breakwater to process of wave propagation, so as to Increase the overall gear wave wave dissipation effect of breakwater.
2nd, the present invention takes into account reflection energy dissipating, the wave train and does by multiple row fence type manger board and bulwark are arranged on rectangle buoyancy tank Relate to the energy dissipating feature such as energy dissipating and turbulent fluctuation energy dissipating, mixing energy dissipation, wave is incident to breakwater and is under multiple action that blending occurs is mixed Miscellaneous, nonlinear effect aggravation, incidence wave can dissipate substantially, can significantly reduce transmission wave height, and wave absorbing effect is very notable.
3rd, by arranging multiple row manger board, the water body constrained near manger board is made to increase the additional mass of breakwater structure body, from And increase the overall inertia of structure, make the motion of rectangle buoyancy tank slow down effect substantially, can further improve wave absorbing effect, separately cause anti- Ripple dike unit does not rely on merely anchoring to limit the motion of buoyancy aid, while mooring system design requirement can be reduced, reducing anchoring is System cost.
4th, the manger board is perforate manger board structure, under equal conditions reduces manger board concentration as far as possible and is produced by force phenomenon Raw, structure stress is clearly and uniform reasonable, reduces manger board as far as possible and occurs to concentrate as such breakwater main bearing member The probability of failure by shear.
5th, the board plug type manger board is the structure that flexibly can be installed, and can separately install again, remove from after breakwater basis is built up The overall lifting of large complicated breakwater, installment work, construction are flexible;Board plug type manger board can be flexible according to concrete operating mode Arrangement, when ripple condition is violent, can install board plug type manger board in each reserved T-shaped space of rectangle buoyancy tank, and between manger board Arrangement support beam, to the more severe operating mode of condition of compatibility;When the less, operating mode of unrestrained height is relatively simple, can be in rectangle buoyancy tank Reserved T-shaped gap hop arrangement manger board simultaneously removes arrangement support beam from, to adapt to relatively simple operating mode, now, rectangle It is liquid level and air interface that T-shaped gap structure is reserved on buoyancy tank, can also aggravate water body disorder under wave action, anti-so as to strengthen Ripple dike entirety effect of energy dissipation.
6th, the manger board is generally main bearing member, during using the design, if it there is destruction in manger board can in time, it is clever It is living, conveniently complete manger board change, and repair.If floating breakwater is reclaimed, manger board structure is also according to durable disposition Condition is flexibly reclaimed, and meets the feature of environmental protection demand for recycling.
7th, the breakwater can adjust manger board sinking, arrangement particular location and manger board length according to Practical Project condition, can Manger board arrangement details are adjusted for the wave condition such as dominant frequency ripple wave height in wave spectrum, so as to increase the waters scope of wave energy dissipation With the integrally-built wave absorbing effect of raising breakwater.
8th, the breakwater respectively constitutes component and is prefabricated member, repeats and recycles, and can be widely applied to provisional or forever Property engineering, is also convenient for reclaiming after function, becomes green building structure, engineering construction energy-conserving and environment-protective long.
In sum, present invention preferably uses arranging multiple row manger board using water body as the additional mass of structure itself, take into account Various Energy Dissipation Modes such as energy dissipating and turbulent fluctuation energy dissipating, mixing energy dissipation are interfered in reflection energy dissipating, the wave train, can significantly reduce breakwater transmission system Number, reduces wave height after dike, while mooring system and buoyancy tank cost can be reduced, present configuration is simple, easy construction, more traditional Floating breakwater is easy to maintain and maintenance cost is cheap, and in the course of work, wave absorbing effect is good, the coastal waters such as applicable deep water, shallow water Region.
Present invention also offers a kind of method for designing of the floating breakwater that unrestrained plate is kept off with multiple row fence type, flow process is such as Shown in Fig. 7:
Step one:Analysis ripple condition
The design standard for adopting is determined according to wave situations and use requirement, determines that Design Wave adopts the return period for 50 years or 25 Year, wave height of the wave height cumulative frequency for z% determines Design Wave value then.
Step 2:Rectangle buoyancy tank size of main body is designed:
With reference to wave condition design buoyancy tank dimensional details, height d takes d=(0.8~1.2) m, and buoyancy tank width w takes w=(8~16) m.Wherein, buoyancy tank size (length, height) and wave wave high level can be reduced to the process of direct proportion linear relationship, approximately take f (x)= K x+b, concrete coefficient k, b should be separately determined with reference to the physical model experiment result under specific manger board arrangement condition.
Step 3:Wave wall is designed:
Wave wall design is slightly different with traditional design, and in the design, wave wall should be expired apart from D away from rectangle buoyancy tank lateral edges of heading sea Foot 0.5 H≤D≤H, from buoyancy tank jack-up height S >=0.5 H, H is Design Wave to wave wall height, and wave wall section is set in detail Meter refers to corresponding specification.
Step 4:Manger board is designed:
Manger board design is divided into manger board structure design and manger board columns designs two aspects, and manger board columns should be according to ripple condition Analysis and rectangle buoyancy tank size design are determined after considering.Manger board structure design is as follows:Design manger board vertical extension is M =(1.0~1.15) H, wherein H are Design Wave;Design manger board open bore type is lateral opening, typically take P=5%~ 30%, the concrete numerical value of percent opening P is determined according to ripple condition;The design load of wherein M and P takes Functional relationship process, is determined by physical model experiment and is fitted its functional relationship.Separately, when manger board columns is more, in gear wave Support beam is set between plate.Support beam interval spacing distance takes A=(4~5) m, while designing the concrete numerical value for determining A.
Step 5:Mooring system design:
Mooring system design is designed with reference to traditional anchoring approach according to stability principle, and each rectangle buoyancy tank is using T to anchor Suo Jinhang anchors, and determines the size and number of the quality and anchor chain of sinker.
Description of the drawings
Fig. 1 is the breakwater structure cell schematics of the present invention.
Fig. 2 is manger board structural representation
Fig. 3 is breakwater structure unit top view
Fig. 4 is that middle manger board is connected schematic diagram with rectangle buoyancy tank
Fig. 5 is middle apron corrugated sheet structure schematic diagram
The another kind of Fig. 6 present invention represents implementation construction unit schematic diagram
Fig. 7 method for designing flow charts of the present invention
1. wave wall, 2. buoyancy tank hollow region, 3. rectangle buoyancy tank, 4. anchor cable, 5. manger board/board plug type manger board, 6. sinker, 7. Support beam, 8. manger board through hole, 9. links up with, 10, and rectangle buoyancy tank reserves hole.
Specific embodiment
Below technical scheme is further described, but protection scope of the present invention be not limited to it is described Embodiment.
Operating mode 1:(n=4, manger board are sequentially arranged) certain engineering need to build one section of floating breakwater in certain marine site, and chance sets within 50 years one Meter wave height is 2.30m, and floating breakwater is using a kind of floating breakwater design that unrestrained plate is kept off with multiple row fence type, such as Fig. 3 Shown, the floating breakwater is made up of multiple breakwater structure units, as shown in figure 1, single breakwater structure unit is by keeping off wave Wall 1, rectangle buoyancy tank 3, manger board 5, support beam 7, anchor cable 4, sinker 6 are constituted, and are connected by hook 9 between each breakwater unit. Using rectangle buoyancy tank 3 as agent structure, internal be buoyancy tank hollow region 2 to breakwater structure unit, rectangle buoyancy tank 3 passes through anchor cable 4 Sinker 6 is connected to, overall anchoring is in design section;As shown in Figure 3, Figure 4,5 top of manger board is connected for build-in with rectangle buoyancy tank 3 Connect, outside manger board 5 is connected with each other by support beam 7 with middle 8 horizontal overall structure of manger board, enhancing structure entirety it is firm Degree;Wave wall 1 is arranged in 3 top of rectangle buoyancy tank and heads sea side, is rigidly connected with 3 overall structure of rectangle buoyancy tank;Hook 9 is evenly arranged In single 3 both sides of floating breakwater unit rectangle buoyancy tank, linking is mutually twisted.Rectangle buoyancy tank 3 is prefabricated reinforced concrete structure, Due to being designed using multiple row manger board, self gravitation meets structure ballast demand, therefore ballast layer is not provided with inside rectangle buoyancy tank 3, Buoyancy tank height d takes d=0.8m, and buoyancy tank width w takes w=8m.Wave wall 1 is arc wave wall, is arranged in rectangle buoyancy tank 3 and heads sea Side, is connected with 3 integral rigidity of rectangle buoyancy tank, and wave wall 1 heads sea lateral edges apart from D=2.0m away from rectangle buoyancy tank 3, and wave wall 1 is high Spend from 3 top of rectangle buoyancy tank apart from S=1.30m, as shown in Fig. 2 manger board 5 is fence type manger board, 5 vertical extension of manger board For M=2.30m, 5 open bore type of manger board is lateral opening, and percent opening P takes 21%;8 columns of middle manger board combines buoyancy tank chi At very little and breakwater construction, the depth of water, wave situations determine, columns N takes N=2, outside manger board 5 and middle manger board 8, centre Between manger board 8, spacing is satisfied by L=3.0m.Support beam 7 is spaced in intervals arrangement, and spacing distance is A=4.5m, support beam 7 are arranged in manger board centre position not position with pores.In sinker 6 of the rectangle buoyancy tank 3 by 4 anchor system to seabed of anchor cable, adopt The lax formula anchoring approach of parallel type completes the anchoring of rectangle buoyancy tank 3, and each rectangle buoyancy tank 3 is anchored to anchor cable using T, takes T=2.
Operating mode 2:(n=3, manger board arranged for interval) engineering design condition is identical with operating mode 1, it is considered to for simple operating mode, actually set Meter is using manger board arranged for interval scheme, as shown in fig. 6,5 length of manger board is set to 2.60m in design condition, other designs Identical with operating mode 1,5 arranged for interval of manger board under similar sea state conditions increases breakwater unit Shu Shuixiao by increasing by 5 length of manger board Fruit is so as to increase breakwater unit additional mass, while the presence of reserved hole can also dramatically increase the disorderly blending journey of water body Degree, promotes water body mixing energy dissipation, affects water particle motion, so as to good retardance and effect of energy dissipation are played to wave, effectively Wave height after dike is reduced, and stable water environment is provided for marine site after dike.

Claims (9)

1. a kind of floating breakwater that unrestrained plate is kept off with multiple row fence type, it is characterised in that by multiple breakwater structure unit structures Into by linking up with connection between breakwater structure unit;Described breakwater structure unit is by wave wall, rectangle buoyancy tank, gear wave Plate, anchor cable, sinker are constituted;Rectangle buoyancy tank is connected to sinker by anchor cable, and the T-shaped peace for arranging manger board is reserved with rectangle buoyancy tank Dress hole, the manger board hang the T-shaped installation hole for being attached to rectangle buoyancy tank, multiple row plug-in type gear by upper T shape structure Wave plate;The wave wall is arc wave wall, is arranged in rectangle buoyancy tank and heads sea side, is connected with buoyancy tank overall structure.
2. floating breakwater according to claim 1, it is characterised in that described manger board is fence type manger board, Manger board columns N on breakwater structure unit meets N >=2;Manger board vertical extension is M=(1.0~1.15) H, wherein H For Design Wave;Manger board open bore type be lateral opening, percent opening P=5%~30%.
3. floating breakwater according to claim 2, it is characterised in that being provided with support beam between described manger board makes Manger board is connected with each other;The support beam arranged for interval, support beam are arranged in the middle of manger board not position with pores, play connection Manger board, the effect of enhancing structure integral rigidity and stability.
4. floating breakwater according to claim 1, it is characterised in that described hook is evenly arranged in single floating to be prevented Ripple dike unit rectangle buoyancy tank both sides, are mutually twisted linking.
5. floating breakwater according to claim 1, it is characterised in that described rectangle buoyancy tank is discontinuity hollow, rectangular Buoyancy tank, is prefabricated reinforced concrete structure;Buoyancy tank height d takes d=(0.8~1.2) m, and buoyancy tank width w takes w=(8~16) m.
6. floating breakwater according to claim 1, it is characterised in that described wave wall is head sea side away from rectangle buoyancy tank Edge should meet 0.5 H≤D≤H apart from D, and from buoyancy tank jack-up height S >=0.5 H, H is Design Wave to wave wall height.
7. floating breakwater according to claim 1, it is characterised in that the rectangle buoyancy tank is by anchor cable system to seabed Sinker in, the anchoring of rectangle buoyancy tank is completed using the lax formula anchoring approach of parallel type, each rectangle buoyancy tank is using T to anchor cable Pool, T=1~3.
8. the method for wave that disappears of the floating breakwater of unrestrained plate is kept off with multiple row fence type described in a kind of claim 1, and its feature exists In as follows:
A. wave is acted on to breakwater from the incidence of off-lying sea side, and the entirety constituted in rectangle buoyancy tank-manger board-wave wall is head sea structure The lower generation wavy hair of effect is penetrated, and reflects energy dissipating using levee body;
B. when wave action is to multiple row manger board, part wave train Jing manger boards perforate transmission, collided by water body, blended, being rubbed, Stream, turbulent fluctuation energy dissipating;
C. multiple row manger board forms beam water effect, and between manger board, water body increases the additional mass of breakwater, and breakwater is integrally used to Property increase, breakwater and water body are monolithically fabricated equivalence extension breakwater, and under wave action, rectangle buoyancy tank-manger board is overall more Degree of freedom motion response is reduced, and breakwater integral damping effect is significant, anchored structure stress are significantly reduced, and breakwater is overall steady Qualitative lifting.
9. a kind of method for designing of the floating breakwater for keeping off unrestrained plate as claimed in claim 1 with multiple row fence type, includes Following steps:
Step one:Analysis ripple condition
The design standard for adopting is determined according to wave situations and use requirement, determines that Design Wave adopts the return period for 50 years or 25 Year, wave height of the wave height cumulative frequency for z% determines Design Wave value H then;
Step 2:Rectangle buoyancy tank size of main body is designed:
With reference to wave condition design buoyancy tank dimensional details, height d takes d=(0.8~1.2) m, and buoyancy tank width w takes w=(8~16) m;Wherein, buoyancy tank size can be reduced to the process of direct proportion linear relationship with wave wave high level, take f (x)=k x+b, and k, b are to set Meter parameter;
Step 3:Wave wall is designed:
Wave wall should meet 0.5 H≤D≤H apart from D away from rectangle buoyancy tank lateral edges of heading sea, and wave wall height is high from buoyancy tank jack-up Degree S >=0.5 H, H is Design Wave, and wave wall section is with Specification Design;
Step 4:Manger board is designed:
Manger board design is divided into manger board structure design and the design of manger board columns, and manger board columns is analyzed according to ripple condition and rectangle Buoyancy tank size design is determined after considering.Manger board structure design is as follows:Design manger board vertical extension be M=(1.0~ 1.15) H, wherein H are Design Wave;Design manger board open bore type is lateral opening, takes P=5%~30%, wherein M and P Design load take be reduced to wave wave high level in functional relationship process, by physical model experiment determine fitting its function Relation;When manger board columns is more, support beam is set between manger board, support beam spacing distance takes A=(4~5) m;
Step 5:Mooring system design:
According to stability principle, each rectangle buoyancy tank is anchored to anchor cable mooring system design using T, determines the quality of sinker And the size and number of anchor chain, T=1~3.
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