CN106677121B

CN106677121B - Protect the movable permeable spur structure and construction method of Coastal erosion

Info

Publication number: CN106677121B
Application number: CN201611251030.5A
Authority: CN
Inventors: 梁娟
Original assignee: Zhejiang Ocean University ZJOU
Current assignee: Zhejiang Ocean University ZJOU
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2018-12-28
Anticipated expiration: 2036-12-30
Also published as: CN106677121A

Abstract

The invention provides a movable permeable spur structure for protecting the coast from erosion, which includes the coast, caissons and anchoring devices. There are several rows of interlaced caissons on one side of the coast, adjacent caissons are connected by anchor chains, and the center of the caisson is It is hollowed out, with openings on the upper end, connecting rings on both sides of the caisson, water inlet holes on the caisson, trapezoidal sinking pads at the bottom of the caissons, trapezoidal sinking pads placed on the coast foundation, and caissons on both sides. There is an anchoring device, and the anchoring device is connected with the caisson through several anchor chains and fixed on the coast foundation. The movable permeable groyne structure and construction method for protecting the coast from erosion provided by the present invention can not only achieve the effect of coastal erosion prevention It can also be easily removed after the protection requirements are completed. The permeable structure of the spur dike can reduce the impact and damage of the spur dike due to waves and tidal currents, relatively reduce the amount of work, and improve construction efficiency. The dismantled spur dike building materials can also be recycled to avoid waste of building materials.

Description

Protect the movable permeable spur structure and construction method of Coastal erosion

Technical field

The present invention relates to coast protection field, especially a kind of movable permeable spur structure for protecting Coastal erosion and apply Work method.

Background technique

As the fast development of coastal economy and coastal zone resources develop and use increasing considerably for intensity, littoral zone is made Intensity is also increasing.Meanwhile generated that sea level rise by global warming and the wave of ocean, tide, The destruction of the seawater movements such as ocean current and chemical action to seashore, the degree that Coastal erosion retreats are increasingly sharpened.It is invaded in seashore In the control measure of erosion, groynes is the protection works building generally used, and groynes changes the flow dynamic condition of seashore, mud The Scour and Accretion of husky motion process and seashore has reached good protection effect to seashore is corroded.But it is several in engineering practice All groynes are all gravity type or pile foundation type building, and the construction materials such as block stone, the concrete body of casting or caisson are launched Or piling enters on seashore bottom, is fixed on seabed.Fixed groynes, which is once built, to be finished, even if eroding bank section has been completed The requirement of shelter on beach, but still leave in situ, the natural landscape of littoral zone is on the one hand destroyed, the function category of seashore is changed Property, the development and utilization again of seashore are restricted, cannot achieve the sustainable utilization of marine resources.

Summary of the invention

Technical problem to be solved by the present invention lies in provide it is a kind of can not only achieve the effect that seashore LP blades, and The movable permeable spur structure and construction method for the protection Coastal erosion that can be easily removed after completing requirement of shelter.

In order to solve the above-mentioned prior art problems, the present invention uses following scheme: a kind of to protect the movable of Coastal erosion Permeable spur structure, including seashore, open caisson and anchorage device, the seashore side are equipped with the open caisson of several row's interleaveds, phase Adjacent open caisson is connected by anchor chain, and open caisson center is in Openworks shape, and upper end is equipped with opening, and open caisson two sides are symmetrically arranged with connection ring, open caisson It is equipped with inlet opening, open caisson bottom is equipped with trapezoidal bottom hull, and trapezoidal bottom hull is placed on seashore ground, and open caisson two sides are filled equipped with anchorage It sets, anchorage device is connected and fixed on seashore ground by several anchor chains and open caisson.

Successively reduce preferably, the spacing of open caisson is rested the head on from dam to abutment, center of the dam pillow into dam away from for 2.0-10m, To the center of abutment away from for 1.0-2.0m in dam, the spacing of every row's open caisson is 2-3 times of one group of open caisson total length, is sufficiently stopped extra large The impact of water, protects the erosion of seashore, and permeable structure can reduce wave, impact of the trend to open caisson.

Preferably, the angle between anchor chain is 50-70 °, the angle between anchor chain and anchorage device is 50-60 °, reinforcement pair The support of open caisson improves ability to bear when sea beat open caisson.

Preferably, it is 10-30cm that inlet opening, which penetrates the inner wall of open caisson and the diameter of inlet opening, enter open caisson convenient for seawater Inside make well sinking, increase open caisson ballast, keeps steady the bottom of open caisson.

Preferably, trapezoidal bottom hull is equipped with cylindrical hole, cylindrical hole upper end is equipped with the gradient, is equipped with permeable hole in cylindrical hole, Open caisson is fixed in the cylindrical hole in trapezoidal bottom hull, and convenient for the replacement and dismounting of open caisson, resource is recycled.

Preferably, the material of open caisson, trapezoidal bottom hull, anchorage device is armored concrete, the steel in armored concrete Muscle and anchor chain are equipped with erosion shield, increase the service life of groynes group, improve the quality of groynes group.

Preferably, the ingredient and its parts by weight of erosion shield are as follows: 40-45 parts of epoxy acrylic resin, benzoic acid two 3-6 parts of fourth rouge, 5-8 parts of hydroxy-ethyl acrylate, 2-3 parts of polytetrafluoroethylene (PTFE), 12-15 parts of polyvinyl alcohol, p methoxy phenol 2-3 Part, take charge of 80 0.01-0.02 parts of benzene, 0.02-0.03 parts of 1,3-PD.

A kind of movable permeable spur construction method for protecting Coastal erosion, comprising the following steps:

1) prefabricated reinforced concrete open caisson is transported to engineering sea area by way of lightering and lifting and combine；

2) sea-floor relief of open caisson placement position is flattened, leveling area is greater than the area of base of open caisson, by spacing size The fixed trapezoidal bottom hull of piling and anchorage device；

3) open caisson into the water, is fixed in trapezoidal bottom hull, removes lifting appliance；

4) open caisson lower end is connect by anchor chain with anchorage device, and open caisson upper end connect to form fourth by anchor chain with adjacent caissons Dam group, groynes group one end is fixed by the sea, and several row's groynes groups form groynes group.

Preferably, groynes group constructs, using first downstream, upstream, groynes group are constructed using method is attacked and occupied again, each open caisson is adopted With first backshore, then foreshore, last interior shore is successively promoted to sea.

The utility model has the advantages that the movable permeable spur structure and construction method of this protection Coastal erosion provided by the invention, Can not only achieve the effect that seashore LP blades, and can easily be removed after completing requirement of shelter, meanwhile, groynes it is saturating Water construction, can mitigate the impact failure of wave, trend to groynes, opposite to reduce project amount, improve construction efficiency, and after dismounting Groynes construction material it is also can be recycled, avoid the waste of construction material.

Present invention employs above-mentioned technical proposal provide it is a kind of protect Coastal erosion movable permeable spur structure and apply Work method compensates for the deficiencies in the prior art, reasonable design, easy operation.

Figure of description

Fig. 1 is the movable permeable spur plane figure schematic diagram of the present invention；

Fig. 2 is the structural schematic diagram of open caisson of the present invention connection；

Fig. 3 is the movable permeable spur horizontal section schematic diagram of the present invention.

Specific embodiment

It is described in further detail below in conjunction with drawings and examples:

Embodiment 1:

As shown in Figure 1, 2, 3, a kind of movable permeable spur structure for protecting Coastal erosion, including seashore 1,2 and of open caisson Anchorage device 3,1 side of seashore are equipped with the open caisson 2 of several row's interleaveds, and adjacent caissons 2 are connected by anchor chain 4,2 center of open caisson In Openworks shape, upper end is equipped with opening, and 2 two sides of open caisson are symmetrically arranged with connection ring 5, and open caisson 2 is equipped with inlet opening, and 2 bottom of open caisson is set There is trapezoidal bottom hull 6, trapezoidal bottom hull 6 is placed on seashore ground 7, and 2 two sides of open caisson are equipped with anchorage device 3, if anchorage device 3 passes through Dry anchor chain 4 is connected and fixed on seashore ground 7 with open caisson 2.

The spacing of open caisson 2 is rested the head on from dam successively to be reduced to abutment, and center of the dam pillow into dam is away from for 5m, in dam into abutment The heart is 2 times of one group of 2 total length of open caisson away from the spacing for 2m, every row's open caisson 2, sufficiently stops the impact of seawater, protects seashore It corrodes, permeable structure can reduce wave, impact of the trend to open caisson 2.

Angle between anchor chain 4 is 50 °, and the angle between anchor chain 4 and anchorage device 3 is 50 °, reinforces the support to open caisson 2, Improve ability to bear when sea beat open caisson 2.

It is 20cm that inlet opening, which penetrates the inner wall of open caisson and the diameter of inlet opening, and entering in open caisson 2 convenient for seawater makes under open caisson 2 It is heavy, increase by 2 ballast of open caisson, keeps steady the bottom of open caisson 2.

Trapezoidal bottom hull 6 is equipped with cylindrical hole, and cylindrical hole upper end is equipped with the gradient, permeable hole is equipped in cylindrical hole, and open caisson 2 is installed It is fixed in the cylindrical hole in trapezoidal bottom hull 6.

Open caisson 2, trapezoidal bottom hull 6, the material of anchorage device 3 are armored concrete, reinforcing bar in armored concrete and Anchor chain 4 is equipped with erosion shield, increases the service life of groynes group, improves the quality of groynes group.

The ingredient of erosion shield and its preferred weight part are as follows: 40 parts of epoxy acrylic resin, 6 parts of benzoic acid dibutylester, 5 parts of hydroxy-ethyl acrylate, 2 parts of polytetrafluoroethylene (PTFE), 12 parts of polyvinyl alcohol, 3 parts of p methoxy phenol, 80 0.01 parts of benzene of department, 1,3- 0.02 part of propylene glycol.

1) prefabricated reinforced concrete open caisson 2 is transported to engineering sea area by way of lightering and lifting and combine；

2) sea-floor relief of 2 placement position of open caisson is flattened, leveling area is greater than the area of base of open caisson, by spacing size The fixed trapezoidal bottom hull 6 of piling and anchorage device 3；

3) open caisson 2 into the water, is fixed in trapezoidal bottom hull 6, removes lifting appliance；

4) 2 lower end of open caisson is connect by anchor chain 4 with anchorage device 3, and 2 upper end of open caisson is connect by anchor chain 4 with adjacent caissons 2 Groynes group is formed, groynes group one end is fixed by the sea, and several row's groynes groups form groynes group.

Using first downstream, upstream, groynes group are constructed using method is attacked and occupied again for groynes group construction, each open caisson uses first backshore, Foreshore again, last interior shore, successively promotes to sea.

Embodiment 2:

When seashore 1 will be by sea water intrusion, need to establish the movable permeable spur of protection Coastal erosion on seashore 1 Group, is transported to engineering sea area for prefabricated reinforced concrete open caisson 2, by open caisson 2 by way of lightering and lifting and combine The sea-floor relief of placement position flattens, and leveling area is greater than the area of base of open caisson 2, and the spacing according to open caisson 2 is 5m, and every row is heavy The spacing of well 2 is the fixed trapezoidal bottom hull 6 of 2-3 times of distance piling and anchorage device 3 of 2 total length of row's open caisson, then will be sunk Into the water, open caisson 2 is equipped with inlet opening to well 2, and seawater is entered in open caisson 2 by inlet opening, relies on the relationship of buoyancy and gravity, Open caisson 2 is sunk to through the country slowly, and inlet opening increases the ballast of open caisson 2, keeps steady bottom, the open caisson 2 of open caisson 2 that will reach sea Bottom is, will be fixed in cylindrical hole that each open caisson 2 is squeezed into trapezoidal bottom hull 6, trapezoidal bottom hull 6 and seashore ground contact area Greatly, forced area when open caisson 2 sits bottom is increased, the footing that groynes is easily sent out is eliminated and empties the hidden danger for causing groynes to collapse, open caisson 2 The connection ring 5 on open caisson 2 is passed through by anchor chain 4 after being fixed in trapezoidal bottom hull 6 to connect with anchorage device 3, Parallel to the flow direction with Inverse water (flow) direction is equipped with two anchor chains 4, and the angle between anchor chain 4 is 60 °, angle when tension between anchor chain 4 and anchorage device 3 It is 60 °, stable can more fixes open caisson 2, improves the endurance that sea washes open caisson 2 is, the length of anchor chain 4 includes seawater The distance rocked is generated when impacting open caisson 2, is passed through anchor chain 4 between the open caisson 2 in every row and is passed through the connection ring 5 of 2 upper end of open caisson mutually Connection, the last one open caisson 2 are connect by anchor chain 4 with seashore 1, improve the stability of open caisson 2, every row's open caisson 2 intersects peace It sets, greatly improves the ability for stopping sea washes, the quantity of every row's open caisson 2, can root depending on the width of 1 wave band of seashore Establish the groynes group of different in width according to different seashores 1, groynes group constructs using first downstream upstream again, the construction of groynes group using into Account for method, each open caisson 2 using first backshore, then foreshore, it is last in shore, successively promoted to sea, can be by rising when completing protection Motivation extracts open caisson 2, transports, and can be inserted directly into the open caisson 2 shipped when needing to protect seashore 1 again next time and be left In trapezoidal bottom hull 6, resource can be recycled, reduce the waste of resource, the natural landscape of 1 band of seashore will not be destroyed.

Specific embodiment described herein is only to give an example to the present invention.The technical field of the invention Technical staff can make various modifications or additions to the described embodiments or be substituted in a similar manner, but Without departing from of the invention or beyond the scope of the appended claims.

Claims

1. A movable permeable spur structure for protecting the coast from erosion, comprising a coast (1), caissons (2) and anchoring devices (3), characterized in that, one side of the coast (1) is provided with several rows of intervals Staggered caissons (2), adjacent caissons (2) are connected by anchor chains (4), the center of the caissons (2) is hollowed out, with openings at the upper end, and connecting rings are symmetrically arranged on both sides of the caissons (2) (5), the caisson (2) is provided with a water inlet, the bottom of the caisson (2) is provided with a trapezoidal sinking pad (6), and the trapezoidal sinking pad (6) is placed on the coast foundation (7), and the caisson (2) ) are provided with anchoring devices (3) on both sides, and the anchoring devices (3) are connected with the caisson (2) through several anchor chains (4) and fixed on the coastal foundation (7);

The above permeable spur dam structure is constructed using the following methods:

1) Transport the prefabricated reinforced concrete caisson (2) to the project sea area by means of barge and hoisting;

2) Leveling the seabed topography of the caisson (2) placement location, the leveling area is larger than the base area of the caisson, and fixing the trapezoidal sinking pad (6) and the anchoring device (3) by piling according to the size of the spacing;

3) Put the caisson (2) into water, fix it on the trapezoidal sinking pad (6), and remove the lifting equipment;

4) The lower end of the caisson (2) is connected with the anchorage device (3) through the anchor chain (4), and the upper end of the caisson (2) is connected with the adjacent caisson (2) through the anchor chain (4) to form a spur group, and the spur group One end is fixed on the coast, and several rows of groynes form groyne groups.

2. A kind of movable permeable spur dam structure for protecting coastal erosion according to claim 1, characterized in that, the distance between the caissons (2) decreases successively from the dam sleeper to the dam head, and the dam sleeper reaches the center of the dam. The spacing is 2.0-10m, the center distance from the middle of the dam to the head of the dam is 1.0-2.0m, and the spacing of each row of caissons (2) is 2-3 times of the total length of a row of caissons (2).

3. The movable permeable spur structure for protecting coastal erosion according to claim 1, wherein the angle between the anchor chains (4) is 50-70°, and the anchor chains (4) and the anchorage The included angle between the devices (3) is 50-60°.

4. A movable permeable spur dam structure for protecting coastal erosion according to claim 1, characterized in that the water inlet hole penetrates the inner wall of the caisson (2) and the diameter of the water inlet hole is 10-30cm.

5. A movable permeable spur dam structure for protecting coastal erosion according to claim 1, characterized in that, the trapezoidal sinking pad (6) is provided with a cylindrical hole, the upper end of the cylindrical hole is provided with a slope, and the cylindrical hole is provided with a slope. Water-permeable holes are arranged, and the caisson (2) is installed and fixed in the cylindrical hole on the trapezoidal sinking pad (6).

6. A movable permeable spur dam structure for protecting coastal erosion according to claim 1, characterized in that the materials of the caisson (2), trapezoidal sinking pad (6) and anchoring device (3) are all Reinforced concrete, steel bars in the reinforced concrete and anchor chains (4) are provided with an anti-corrosion coating.

7. A movable permeable spur structure for protecting coastal erosion according to claim 6, characterized in that, the composition of the anti-corrosion coating and parts by weight thereof are: 40-45 parts of epoxy acrylic resin, benzoic acid 3-6 parts of dibutyl fat, 5-8 parts of hydroxyethyl acrylate, 2-3 parts of polytetrafluoroethylene, 12-15 parts of polyvinyl alcohol, 2-3 parts of p-methoxyphenol, 80 0.01-0.02 Parts, 0.02-0.03 parts of 1,3-propanediol.

8. A movable type permeable spur dam structure for protecting coastal erosion according to claim 1, characterized in that, the construction of the spur dike group adopts downstream and then upstream, the spur dike group construction adopts the encroachment method, and each caisson adopts front and rear , then the foreshore, and finally the inner shore, advancing to the sea in turn.