CN209923864U - Asymmetric double-float type floating breakwater - Google Patents

Asymmetric double-float type floating breakwater Download PDF

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Publication number
CN209923864U
CN209923864U CN201920409656.7U CN201920409656U CN209923864U CN 209923864 U CN209923864 U CN 209923864U CN 201920409656 U CN201920409656 U CN 201920409656U CN 209923864 U CN209923864 U CN 209923864U
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China
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buoy
pontoon
wave
flotation pontoon
floating breakwater
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CN201920409656.7U
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刘勇
梁家铭
刘晓
何舒玥
王晓亮
胡佳明
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Ocean University of China
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Ocean University of China
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/11Hard structures, e.g. dams, dykes or breakwaters

Abstract

The utility model relates to a coastal engineering technical field especially relates to an asymmetric two flotation pontoon formula floating breakwater, including preceding flotation pontoon, back flotation pontoon, connecting piece and energy dissipation spare, preceding flotation pontoon and back flotation pontoon respectively with connecting piece both ends fixed connection, be provided with the energy dissipation spare that is used for disturbing wave motion on the connecting piece perpendicularly, the energy dissipation spare has increased the perpendicular depth of water scope of unrestrained that disappears, through with the water within a definite time friction and the top layer energy of turbulent motion dissipation wave. The energy dissipation piece is stainless steel pipe or glass steel, the flotation pontoon material is concrete or glass steel, and the form of asymmetric two flotation pontoons is adopted in this design, increases the relative width of floating breakwater, has reduced engineering cost, reflects the wave through preceding flotation pontoon simultaneously, and the fracture to the wave in middle clearance department to and the back flotation pontoon is reduced the wave once more and is reached multiple effect of reducing the wave, is showing and has improved the wave-absorbing ability, has especially improved and has reduced the effect to longer period wave.

Description

Asymmetric double-float type floating breakwater
Technical Field
The utility model relates to a coastal engineering technical field especially relates to an asymmetric twin-pontoon formula floating breakwater.
Background
The structure of the breakwater can be generally divided into a heavy breakwater type and a light breakwater type, wherein the heavy breakwater is a traditional and common breakwater type and comprises a slope breakwater, a straight wall breakwater, a hybrid breakwater and the like; light breakwaters are developed in recent decades, and various light breakwaters such as permeable breakwaters, floating breakwaters, air-jet breakwaters, water-jet breakwaters and the like are researched according to the characteristic that wave energy is concentrated on the surface layer and the special needs of engineering.
Compared with the traditional breakwater, the floating breakwater can adapt to the conditions of large water depth, weak foundation, large tidal range, introduction of water body exchange and the like, and has wide prospects in various fields of port and coastal engineering, ocean engineering, mariculture and the like. The floating breakwater can be used as a permanent or temporary building, is applied to the fields of shielding the water area of a deepwater bay dock as a temporary berthing dock of a ship, shielding aquaculture and bathing beach water areas, shielding offshore construction sites, shielding offshore military mobile dock water areas, and serving as wave-proof measures for offshore disaster prevention and emergency.
The floating breakwater is composed of wave-absorbing floating body and anchoring system. The wave-absorbing floating body consists of a box body or a floating raft with a certain draft, wherein the box body and the floating raft are connected with an anchor chain with one end fixed on the seabed and float on the water surface. The wave-eliminating principle is that the floating body is used for preventing waves from being transmitted or breaking the waves, and the waves float up and down and swing back and forth under the action of the waves to interfere with the motion of water particle of the waves and destroy the motion structure of the water particle in the waves, so that the aim of reducing the wave energy is fulfilled.
The floating breakwater has the advantages of low construction cost, simple structure, rapid construction, simple and convenient disassembly and migration, small influence by water depth and geological conditions, strong seawater exchange function and the like, and is concerned by the field of coastal engineering in the current practical engineering application. The conventional floating breakwater mainly reflects incident wave energy to the open sea by using buoyancy tanks to reduce transmitted waves, and is generally made of steel plates or reinforced concrete, and the buoyancy tank type floating breakwater is a single buoyancy tank type floating breakwater which has the simplest structure and is most applied. However, the wave-breaking effect of the single-pontoon type floating breakwater is not ideal, and particularly for waves with longer periods, in order to overcome the defect, the multi-pontoon type floating breakwater needs to be researched.
Therefore, it is a technical problem to be solved urgently to research the floating breakwater with better effect of reducing the longer-period waves.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to solve the above problem of the prior art, the utility model provides a wave is cut unrestrained effectual to longer period wave, simple structure practices thrift the cost, can carry out multiple wave dissipation and the wave dissipation effect is showing asymmetric two flotation pontoon formula floating breakwater.
(II) technical scheme
In order to achieve the above object, the utility model discloses a main technical scheme include:
the utility model provides an asymmetric two flotation pontoon formula floating breakwater, including preceding flotation pontoon, back flotation pontoon, connecting piece and energy dissipation piece, the both ends of connecting piece respectively with preceding flotation pontoon and back flotation pontoon fixed connection, energy dissipation piece sets up the downside at the connecting piece.
According to the utility model discloses, the length and the width homogeneous phase of preceding flotation pontoon and back flotation pontoon are the same, and the height that highly is less than preceding flotation pontoon of back flotation pontoon, and preceding flotation pontoon and back flotation pontoon lower limb flush, when asymmetric two flotation pontoon formula floating breakwater is located the aquatic, the incident direction of wave is from the past flotation pontoon to back flotation pontoon.
According to the utility model discloses, still including the anchoring device, the anchoring device includes anchor chain and sinker, the one end and sinker fixed connection of anchor chain, the other end of anchor chain with respectively with preceding flotation pontoon or back flotation pontoon fixed connection, the anchor chain symmetric distribution of setting on same flotation pontoon sets up the same symmetric distribution of anchor chain on different flotation pontoons.
According to the utility model discloses, the length that energy dissipation spare surpassed the flotation pontoon lower limb is 2/3 ~ 4/3 of preceding flotation pontoon height.
According to the utility model discloses, the ratio of the distance between preceding flotation pontoon, the back flotation pontoon and the width sum of preceding flotation pontoon, back flotation pontoon is 0.8 ~ 1.5.
According to the utility model discloses, all be provided with the opening on preceding flotation pontoon and the back flotation pontoon for the weight balance and the draft of preceding flotation pontoon and back flotation pontoon are adjusted to the inside injected water of flotation pontoon and back flotation pontoon forward.
According to the utility model discloses, the cross section of preceding flotation pontoon and back flotation pontoon is the rectangle, and preceding flotation pontoon and back flotation pontoon are the closed cavity structure.
According to the utility model discloses, evenly set up a plurality of energy dissipation pieces along flotation pontoon length direction.
According to the utility model discloses, the material that preceding flotation pontoon and back flotation pontoon adopted is one or more in concrete, glass steel or the fiber reinforced plastic material.
According to the utility model, the outer sides of the front buoy and the rear buoy are symmetrically provided with the anti-collision devices, and each anti-collision device comprises an anti-corrosion layer, a front stress steel plate layer, a stress cavity, a spring, a rear stress steel plate layer and a flexible buffer layer; the anticorrosive coating sets up in the front and receives the upside and the downside in atress steel deck outside and atress chamber, and the interval between preceding atress steel deck and the back atress steel deck constitutes the atress chamber, and spring fixed connection is between preceding atress steel deck and the atress steel deck.
(III) advantageous effects
The utility model has the advantages that:
1. the utility model discloses an asymmetric two flotation pontoon formula floating breakwater comprehensive utilization cross sections disturb the water motion for the two flotation pontoons of rectangle and the energy dissipation spare that sets up between the two flotation pontoons, compromise the effect of reflection energy dissipation, broken energy dissipation and turbulent energy dissipation, and the wave is incident to the breakwater and is in under the multiple action, and nonlinear effect aggravates, reduces wave transmission coefficient, reaches the wave effect of ideal.
2. The utility model discloses an asymmetric two flotation pontoon formula floating breakwater compares with other floating breakwaters, adopts the setting of asymmetric two flotation pontoons and the setting of energy dissipation spare, under the condition that reaches the same unrestrained effect that disappears, can reduce the material, reduces engineering cost.
3. The utility model discloses an asymmetric two flotation pontoon formula floating breakwater simple structure, the component part can be prefabricated in advance and form, can assemble fast and form during site operation, and, the utility model discloses a set up the opening on the two flotation pontoons and to water injection in the two flotation pontoons to this draft of adjusting floating breakwater, thereby increase floating breakwater's wave absorption ability, and with this adjust the weight balance of two flotation pontoons around.
Drawings
Fig. 1 is a three-dimensional perspective view of an embodiment 1 of the asymmetric twin-pontoon floating breakwater of the present invention;
fig. 2 is a front view of an embodiment 1 of the asymmetric twin-pontoon floating breakwater according to the present invention;
fig. 3 is a side view of an embodiment 1 of the asymmetric twin-pontoon floating breakwater according to the present invention;
fig. 4 is a top view of an embodiment 1 of the asymmetric twin-pontoon floating breakwater according to the present invention;
fig. 5 is a three-dimensional perspective view of the asymmetric twin-pontoon floating breakwater of the present invention in embodiment 2;
fig. 6 is a structural view of a collision prevention device 8 according to embodiment 2.
[ description of reference ]
1: a front pontoon; 2: a rear buoy; 3: a connecting member; 4: an energy dissipation member; 5: an anchor chain;
6: sinking the blocks; 7: an opening;
8: an anti-collision device;
801: an anticorrosive layer; 802: a front stressed steel plate layer; 803: a force-bearing cavity; 804 a spring; 805: a rear stressed steel plate layer; 806: a flexible buffer layer.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.
Example 1
The utility model provides an asymmetric double-float type floating breakwater, which comprises a front float 1, a rear float 2, a connecting piece 3 and an energy dissipation piece 4, wherein the front float 1 and the rear float 2 are fixedly connected into a whole through the connecting piece 3; the energy dissipation part 4 is vertically arranged on the connecting piece 3, the energy dissipation part 4 is fixedly connected with the connecting piece 3, the energy dissipation part 4 is used for disturbing wave motion, and the energy dissipation part 4 dissipates surface energy of waves through friction and turbulent motion between the energy dissipation part 4 and a water body.
The anchoring device comprises an anchor chain 5 and a sinking block 6, one end of the anchor chain 5 is fixedly connected with the sinking block 6, the other end of the anchor chain 5 is fixedly connected with a front buoy 1 and a rear buoy 2 respectively, the anchor chains 5 arranged on the same buoy are symmetrically distributed, the anchor chains 5 arranged on different buoys are also symmetrically distributed, balancing weights are anchored on a seabed under the action of self gravity, and the buoys are relatively fixed on the sea surface within a certain range through the anchor chains.
As shown in fig. 3, the buoy is a closed cavity structure with a rectangular cross section, the width of the buoy is B1, the height of the front buoy 1 is h1, the height of the rear buoy 2 is h2, the buoy is hollow and provides overall buoyancy, the buoy can be formed by traditional concrete pouring or novel material glass fiber reinforced plastic prefabrication according to actual conditions, the energy dissipation member 4 is a stainless steel pipe or a glass fiber reinforced plastic pipe with the diameter of D, the connecting member 3 of the energy dissipation member is respectively and vertically and fixedly connected with one side surface of the front buoy 1 and the side surface of the rear buoy 2, the fixed connection mode is flange connection, the anchor chains are respectively and fixedly connected with the other sides of the two buoys and are symmetrically arranged, the energy dissipation member 4 is vertically arranged on the connecting member 3, the energy dissipation member 4 is fixedly connected with the connecting member 3, and the energy dissipation member.
Preferably, as shown in fig. 3, the length of the energy dissipater 4 exceeding the lower edge of the buoy is H, and H is about 2/3-4/3 of the height H of the buoy, so the value of H is limited, because if H < 2/3-4/3H, a certain wave dissipation effect cannot be achieved, and materials are wasted; if H is greater than 2/3-4/3H, the manufacturing cost is increased, so that the cost performance of H is highest within the range of 2/3-4/3H, and the H is preferably selected according to the conditions of different water areas and wave-absorbing requirements.
The length of the connecting piece 3 can be changed according to different wave-absorbing requirements, and as shown in fig. 4, the length of the connecting piece 3 is B1, and B1 can be changed according to different wave-absorbing requirements.
Preferably, the front pontoon 1 and the rear pontoon 2 have the same length and the same width of the front pontoon 1 and the rear pontoon 2 are B1, and the lower edges of the front pontoon 1 and the rear pontoon 2 are flush, so that the front pontoon 1 contacts waves before the rear pontoon 2 in use, i.e. the incident direction of the waves is from the front pontoon 1 to the rear pontoon 2, as shown in fig. 1.
Preferably, the ratio of the distance between the front buoy 1 and the rear buoy 2 to the sum of the widths of the front buoy 1 and the rear buoy 2 is 0.8-1.5.
Preferably, as shown in fig. 3, a plurality of connecting members 3 are uniformly provided between the front buoy 1 and the rear buoy 2 in the length direction of the breakwater unit.
Preferably, the front buoy 1 and the rear buoy 2 are provided with openings 7, the openings 7 are used for injecting water into the front buoy 1 and the rear buoy 2 to adjust the weight balance and the draft of the front buoy 1 and the rear buoy 2, optionally, seawater can be directly injected into the front buoy 1 and the rear buoy 2 through the openings 7, the operation is convenient and economical, so that the requirement of different sea area conditions on the draft is met, and it is noted that the volume of the rear buoy 2 is smaller than that of the front buoy 1, so that the counterweight amount of the rear buoy, namely the water adding amount, is larger than that of the front buoy, so that the balance can be ensured and the overturning is prevented.
Alternatively, the surface of the dissipaters 4 may be provided with patterns or holes to increase the roughness of the surface of the dissipaters 4, further increasing the ability of the dissipaters 4 to dissipate wave energy.
Preferably, the surface of the floating breakwater is coated with a coating for preventing seawater corrosion, and further, an appropriate amount of alkaline substances are added into the coating to enable the pH value to reach 8.5-10.5, so that marine organisms are prevented from attaching.
Example 2
The embodiment is slightly modified on the basis of the above embodiment 1, as shown in fig. 5, specifically, the anti-collision devices 8 are symmetrically arranged on the outer sides of the front buoy 1 and the rear buoy 2, and each anti-collision device 8 includes an anti-corrosion layer 801, a front stressed steel plate layer 802, a stressed cavity 803, a spring 804, a rear stressed steel plate layer 805, and a flexible buffer layer 806.
Specifically, as shown in fig. 6, the inner structure of the anti-collision device 8 is that the anti-corrosion layer 801 is disposed on the outermost surface of the anti-collision device 8, that is, the anti-corrosion layer 801 is disposed on the outer side of the front stressed steel plate layer 802 and the upper side and the lower side of the stressed cavity 803, and is used for preventing corrosion of seawater, the stressed cavity 803 is formed by the gap between the front stressed steel plate layer 802 and the rear stressed steel plate layer 805, and the spring 804 is fixedly connected between the front stressed steel plate layer 802 and the stressed steel plate layer 805.
Because one side (namely the side where the rear stressed steel plate layer 805 is located) of the anti-collision device 8 and the front buoy 1/the rear buoy 2 which are tightly connected can be regarded as a coplanar, an anti-corrosion layer is not arranged on the side any more, in the stress process of the anti-collision device, the front stressed steel plate layer 802 is firstly impacted by external force and then is transmitted to the spring 804, the spring 804 is arranged in the stress cavity 803, the spring 804 transmits the received force to the rear stressed steel plate layer 805, simple harmonic motion is performed between the front stressed steel plate layer 802 and the rear stressed steel plate layer 805, the rear stressed steel plate layer 805 finally transmits the residual force to the flexible buffer layer 806, the flexible buffer layer 806 absorbs energy, the front buoy 1/the rear buoy 2 is protected, the whole anti-collision device 8 plays a role in preventing damage caused by foreign object impact on the front buoy 1/the rear buoy 2, and the service life can be greatly prolonged.
Preferably, the material of the flexible buffer layer is sponge, rubber and other materials with an energy absorption effect.
Principle of operation
The general floating breakwater has poor effect of reducing longer period waves, and the increase of the relative width of the floating breakwater is the main way of improving the effect of reducing the longer period waves, and the relative width is defined as follows:
BL=B/LW(1)
in the formula, BLRelative width, B the overall width of the breakwater, LW the wave length of the ocean.
Under the uncontrollable condition of wave wavelength LW, in order to improve the effect of reducing longer-period waves, the width B of the floating breakwater structure can only be increased, but the increase of the width of the floating breakwater structure can bring about the sharp increase of the manufacturing cost, and the stress of the anchor chain can also be increased, so that the safety and reliability of the breakwater are reduced.
And the utility model discloses a form of twin-float has improved the width of breakwater to because connect through connecting piece 3 between preceding flotation pontoon 1 and the back flotation pontoon 2, as shown in fig. 4, wherein distance B2 between preceding flotation pontoon 1 and the back flotation pontoon 2 replaces the material packing the same with the flotation tank through connecting piece 3, and this has just significantly reduced engineering cost, compares simple increase breakwater width simultaneously, and the atress of anchor chain is less relatively.
Other related researches show that the transmission coefficient of the common floating breakwater is less than 0.5, and the relative width B is requiredLMore than 0.3 is required and the transmission coefficient is defined as follows:
Kt=Ht/Hi(2)
in the formula, KtAs a transmission coefficient, HtIs the transmission wave height, H, behind the dikeiThe incident wave height in front of the bank.
Therefore, as can be seen from the formula (2), the smaller the transmission coefficient, the better the wave-breaking effect.
The utility model discloses owing to set up energy dissipation spare 4 in connecting piece 3 department, energy dissipation spare 4 has increased the perpendicular depth of water scope of unrestrained, research and relevant experiment of wave theory show, the energy of wave is concentrated on the water top layer, the following three times of ripples height depth of water within range has concentrated 98% of whole wave energy, energy dissipation spare 4 set up and to make the incident wave produce disorderly efflux, reach the effect of disturbing wave motion, and through with the water between friction and turbulent motion reach consume top layer wave energy, thereby can play the effect of cutting down wave energy by a wide margin, compare with traditional floating breakwater, when the wavelength and the wave height of incident wave are the same, the utility model discloses the two flotation pontoon formula breakwater transmission coefficient that sets up is littleer, and the unrestrained effect of unrestrained is better.
Further, the wave transmission coefficient KtWill vary with the relative spacing of the twin buoys, which is defined as:
J=B2/2B1 (3)
in the formula: j is the relative distance between the double buoyancy tanks; b2 is the distance between front buoy 1 and rear buoy 2; b1 is the width of a single pontoon, and since the two pontoons are the same width, B1 is shown here directly as the width of the pontoon itself.
When other conditions are not changed, and J is 0.8-1.5, the wave transmission coefficient K istAnd the smaller the size, the best wave eliminating effect of the double buoyancy tanks is. Therefore, preferably, the relative distance J between the two buoys is 0.8 to 1.5.
Because the floating box type floating breakwater mainly reduces waves by reflecting the waves, the wave-facing surface of the structure reflects partial wave energy to the open sea, and the energy of transmitted waves is reduced. The utility model discloses a two flotation pontoons come dual retaining wave around, when the wave is less, the wave can be blockked by front pontoon 1, can not produce wave more and wave the phenomenon that wave crossed front pontoon 1, but when the stormy waves is great, front pontoon 1 can not be kept out the wave completely, and front pontoon 1 will be crossed to the wave this moment, reachs back flotation pontoon 2, at this moment, back flotation pontoon 2 will carry out the secondary to the wave and cut down, greatly reduces the energy of wave.
In fact, the effect of double wave breaking is achieved, but the effect of triple wave breaking is achieved, namely triple wave breaking is achieved through the front buoy 1, the rear buoy 2 and the energy dissipation member 4. When the waves are larger and the waves cross the waves, firstly the front buoy 1 reflects the waves and destroys the motion trail of the waves to reduce the energy of the waves, namely the first heavy wave elimination; secondly, the gap between the front buoy 1 and the rear buoy 2 can break waves, and the energy dissipation members 4 arranged on the connecting pieces 3 are added, so that the vertical water depth range of the wave dissipation is enlarged, the waves generate turbulent jet flow at the densely distributed energy dissipation members 4 to disturb wave motion, and surface wave energy is dissipated through friction and turbulence between the energy dissipation members 4 and a water body, namely the second wave dissipation; finally, the waves are further reduced through the rear buoy 2, namely the third wave elimination, so that the effect of the third wave elimination is achieved.
The triple breakwaters act simultaneously, the wave-eliminating effect is greatly improved, meanwhile, due to the fact that a phase difference is generated between incident waves and waves passing through a breakwater, the generated phase difference reacts on the incident waves to a certain extent, a certain reduction effect is generated on the incident waves, the arrangement of the front buoy 1 and the rear buoy 2 is equivalent to the generation of two phase differences, and therefore the wave-eliminating effect is further improved.
Because of the triple wave elimination, the utility model further arranges the front buoy 1 and the rear buoy 2 asymmetrically, thus further reducing the engineering materials on the basis of achieving the same wave elimination effect, the front buoy 1 plays the main wave elimination role, and needs to be arranged with higher height, the waves are sufficiently reduced under the action of the front buoy 1, if the rear buoy 2 is arranged with the same height as the front buoy 1, the waste of the materials is caused, the rear buoy 2 is more used as a supplement, in order to increase the breakwater width to improve the wave elimination effect, and the function of the energy dissipation part 4 is added, the rear buoy 2 at the moment is arranged with lower height to meet the requirement, therefore, the length and the width of the rear buoy 2 in the utility model are kept consistent with the front buoy 1, and the height of the rear buoy 2 is less than the front buoy 1, so as to achieve the premise of completely guaranteeing the wave elimination requirement, further reducing the construction cost, as shown in fig. 3, the height of the rear buoy 2 is h2< the height of the front buoy 1, h 1.
Optionally, energy dissipaters 4 with different lengths and numbers can be flexibly adopted to adapt to different wave conditions, so that different wave dissipation requirements can be met more economically, as shown in fig. 3, the distance between the energy dissipaters 4 is b, the length of the energy dissipaters 4 exceeding the lower edge of the buoy is H, as b is reduced, namely the density of the energy dissipaters 4 is increased, the wave dissipation performance is improved, as H is increased, namely the length of the energy dissipaters 4 is increased, the wave dissipation performance is also improved, as b is set in certain areas with higher wave dissipation requirements, the distance between steel pipes is b1L-length steel pipes, and 3/2b spacing between steel pipes in the area with low wave-eliminating requirement1(i.e. greater than the preceding b)1) To reduce the density of the dissipaters 4, the length is 2/3L (i.e. less than L before, but the length is chosen as much as possible within the range of the preceding requirement, H should be between 2/3 and 4/3H), the spacing and length do not require to be changed simultaneously, and the change may cause the wave-breaking effect to be too low.
Using the linear wave theory, the following formula can be obtained:
in the formula: k is a radical oftIs the wave transmission coefficient; k is a radical ofiThe wave number of the incident wave is the reciprocal of the wavelength of the incident wave; b is the structure width (m); d is structural draft (m); d is the depth of water (m).
According to the formula (4), when k isiA fixed value d is defined as k, the larger B istThe smaller, the larger D, ktThe smaller the wave transmission coefficient, i.e. the wider the structure, the better the wave cutting effect; and as can be seen from the formula (4), under different wave heights and wave periods, the wave transmission coefficient of the floating breakwater is reduced along with the increase of the relative water inlet depth of the buoyancy tank, so that the openings 7 arranged on the front buoy and the rear buoy are preferably used for adding water into the front buoy and the rear buoy through the openings 7 to adjust the draught of the floating breakwater, and the draught of the whole floating breakwater is increased, so that the wave transmission coefficient is further reduced, and the wave absorption performance of the floating breakwater is improved to a certain extent.
Simultaneously because the utility model discloses preceding flotation pontoon 1 and the asymmetric setting of back flotation pontoon 2, consequently the volume of back flotation pontoon 2 is less than preceding flotation pontoon 1, and when material density is the same, can cause back flotation pontoon 2 weight to be less than preceding flotation pontoon 1, can be because of the unbalanced weight unstability like this, consequently, it is also very necessary to adjust the balanced weight of preceding flotation pontoon 1 and back flotation pontoon 2 through adding water in the opening 7 to setting up.
In addition, the utility model discloses a preceding flotation pontoon 1 is closed cavity structure with back flotation pontoon 2, the ability of clipping that sets up the setting that cooperates opening 7 can further strengthen the floating breakwater like this, specifically, can weaken the induced radiant wave of wave motion after the closed cavity structure adds water, water in the flotation tank rocks along with the motion production of floating breakwater, make the inside wave power that has a power to resist the outside of breakwater, reduce the motion range of breakwater and because the forced vibration that the wave arouses, further reduce wave transmission coefficient, thereby further strengthen the wave absorption performance of breakwater.
The utility model discloses an asymmetric two flotation pontoon formula floating breakwater comprehensive utilization cross sections disturb water motion for the two flotation pontoons of rectangle and the energy dissipation piece 4 that sets up between the two flotation pontoons, compromise reflection energy dissipation, broken energy dissipation and turbulent energy dissipation, wave incident to the breakwater is in under the multiple action, nonlinear effect aggravation, reduce wave transmission coefficient, reach the breakwater effect of ideal, in addition, the utility model discloses can reduce the material, reduce engineering cost, simple structure, the component part can be prefabricated in advance and form, can assemble fast during site operation and form to, through set up the opening on the two flotation pontoons and to the draft of floating breakwater is adjusted to this, thereby increases the wave absorption ability of floating breakwater, and with this weight balance of adjusting two flotation pontoons around.
It should be understood that the above description of the embodiments of the present invention is only for illustrating the technical lines and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, but the present invention is not limited to the above specific embodiments. All changes and modifications that come within the scope of the claims are to be embraced within their scope.

Claims (10)

1. The utility model provides an asymmetric two flotation pontoon formula floating breakwater which characterized in that:
comprises a front buoy (1), a rear buoy (2), a connecting piece (3) and an energy dissipation piece (4);
two ends of the connecting piece (3) are respectively fixedly connected with the front buoy (1) and the rear buoy (2);
the energy dissipation piece (4) is arranged on the lower side of the connecting piece (3).
2. The asymmetric twin-pontoon floating breakwater of claim 1, wherein:
the length and the width of the front buoy (1) and the rear buoy (2) are the same, the height of the rear buoy (2) is smaller than that of the front buoy (1), and the lower edges of the front buoy (1) and the rear buoy (2) are flush;
when the asymmetric double-buoy type floating breakwater is located in water, the incident direction of waves is from the front buoy (1) to the rear buoy (2).
3. The asymmetric twin-pontoon floating breakwater of claim 1, wherein:
the anchor chain device comprises an anchor chain (5) and a sinking block (6), one end of the anchor chain (5) is fixedly connected with the sinking block (6), the other end of the anchor chain (5) is fixedly connected with the front buoy (1) or the rear buoy (2), the anchor chains (5) arranged on the same buoy are symmetrically distributed, and the anchor chains (5) arranged on different buoys are symmetrically distributed in the same way.
4. An asymmetric twin-pontoon floating breakwater as claimed in any one of claims 1 to 3, wherein:
the length of the energy dissipation piece (4) exceeding the lower edge of the floating pontoon is 2/3-4/3 of the height of the front floating pontoon (1).
5. The asymmetric twin-pontoon floating breakwater of claim 4, wherein:
the ratio of the distance between the front buoy (1) and the rear buoy (2) to the sum of the widths of the front buoy (1) and the rear buoy (2) is 0.8-1.5.
6. An asymmetric twin-pontoon floating breakwater as claimed in claim 5, wherein:
all be provided with opening (7) on preceding flotation pontoon (1) and back flotation pontoon (2), be used for to the weight balance and the draft of preceding flotation pontoon (1) and back flotation pontoon (2) are adjusted to the injected water of preceding flotation pontoon (1) and back flotation pontoon (2) the inside.
7. The asymmetric twin-pontoon floating breakwater of claim 6, wherein:
the cross section of preceding flotation pontoon (1) and back flotation pontoon (2) is the rectangle, and preceding flotation pontoon (1) and back flotation pontoon (2) are closed cavity structure.
8. The asymmetric twin-pontoon floating breakwater of claim 6, wherein:
a plurality of energy dissipation pieces (4) are uniformly arranged along the length direction of the buoy.
9. The asymmetric twin-pontoon floating breakwater of claim 1, wherein:
the front buoy (1) and the rear buoy (2) are made of one or more of concrete, glass fiber reinforced plastic or fiber reinforced plastic materials.
10. The asymmetric twin-pontoon floating breakwater of claim 1, wherein:
the anti-collision device (8) is symmetrically arranged on the outer sides of the front buoy (1) and the rear buoy (2), and the anti-collision device (8) comprises an anti-corrosion layer (801), a front stress steel plate layer (802), a stress cavity (803), a spring (804), a rear stress steel plate layer (805) and a flexible buffer layer (806);
the anti-corrosion layer (801) is arranged on the outer side of the front stressed steel plate layer (802) and the upper side and the lower side of the stressed cavity (803), the stressed cavity (803) is formed by the interval between the front stressed steel plate layer (802) and the rear stressed steel plate layer (805), and the spring (804) is fixedly connected between the front stressed steel plate layer (802) and the stressed steel plate layer (805).
CN201920409656.7U 2019-03-28 2019-03-28 Asymmetric double-float type floating breakwater Active CN209923864U (en)

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