CN105297674A - Shingle beach section design method under conditions of strong coastal dynamic - Google Patents
Shingle beach section design method under conditions of strong coastal dynamic Download PDFInfo
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- CN105297674A CN105297674A CN201510649447.6A CN201510649447A CN105297674A CN 105297674 A CN105297674 A CN 105297674A CN 201510649447 A CN201510649447 A CN 201510649447A CN 105297674 A CN105297674 A CN 105297674A
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- Y—GENERAL 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
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- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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Abstract
The invention provides a shingle beach section design method under the conditions of a strong coastal dynamic. The method comprises the steps of determining the grain size of backfilling shingle according to the coastal wave dynamic conditions, hierarchical design of the backfilling beach section, design of the backfilling shingle beach foreshore beachface slope, design of the shingle beach berm seaward slope, design of the shingle beach berm top surface elevation, design of the width of the shingle beach berm and the like, and forming of a common value table of relevant parameters. The common value table of the design parameters and the section design method can serve as shingle beach section design references of a similar shoreline repair and regulation project. After a beach repair project designed by adopting the shingle beach section design method is completed, a certain scale of shingle beach is formed, and the direct scouring action of waves and sea currents to a coast can be counteracted or weakened through the form adjustment of the shingle beach under the action of the strong dynamic sea currents, so that the coast is stabilized better. The diversity of beach landscape can be enhanced through the littoral shingle beach, and the grade of coastal landscape can be improved.
Description
Technical field
The present invention relates to a kind of pebble beach Section Design method under stronger Coastal Dynamic condition.
Background technology
Because river Store water, artificial shore protection, valley harnessing etc. cause sediment discharge to reduce, coastal Perioperative cardiac events engineering, bank protection work, account for beach engineering etc. cause seashore enter sea sand source reduce, nearshore sea sand exploitatiom causes sand beach cycle system to balance and is broken, etc. reason like this, cause a lot of seashore generation Coastal erosion, cause water front retrogressing, degenerate in sandy beach, shore protection is damaged, and then directly threatened road and the local-style dwelling houses at seashore rear.According to investigation data in recent years, the soft seashore water front of China has 40% erosion state being in distinct program nearly.Early stage Coastal erosion protection often adopts the thinking of " blocking up ", namely adopts rigid shore protection to offset wave, ocean current to the impact of seashore, reaches the object of protection.In recent years, repair as representing soft shore protection mode with seabeach maintenance and seabeach, gradually by people are accepted and praise highly, reason is that this mode is ecological, harmonious, and its recovery scenario complies with the rule of coastal landform geomorphic evolution as far as possible, instead of opposes with it.Seabeach maintenance and reinstatement works also have a large benefit can increase sand beach Tourism Spatial exactly, and this tourism development for a lot of coastal cities is indispensable precious resources.
Research shows, because the beach that accounts for of mankind's activity is built, change natural chiltern coastline configuration, seashore is caused to there is the trend of erosional retreat on the whole, namely the wave ocean current dynamic that seashore is natural can promote water front and retreat to original position, although this variation tendency temporarily limit by artificial shore protection, but this dynamic action exists constantly, it can form a strong erosion district at artificial shore protection root, in this region, shore protection meets with washing away breakage, shore protection front sandy beach beach face constantly lose low, bank revetment foundation is of common occurrence by phenomenons such as sappings.For this seashore, adopt the sand of common particle diameter as backfill, being limited to marine usage sensitiveness can not adopt the unrestrained facility that disappears such as groynes or offshore dike to design seabeach recovery scenario simultaneously, can not adapt to Coastal Dynamic condition, often cause after engineering completes and repair seabeach loss comparatively greatly, seabeach is unstable.In view of this, according to the topography and landform character of cobble beach under natural endowment, we have proposed the relevant parameter of the cobble beach Section Design repairing seabeach engineering, and for engineering design practice.
Summary of the invention
Object of the present invention, it is a kind of pebble beach Section Design method that will provide under stronger Coastal Dynamic condition, it, for the bank-line control reinstatement works improved compared with the protection of strong power erosion coast water front, sea shore landscape, can improve the stability of seashore, and beautify coast landscape.
The present invention is achieved in that the pebble beach Section Design method under described a kind of stronger Coastal Dynamic condition, and design pebble beach beach berm face and original shore protection intersection place elevation are H, and sea wall root sea bottom surface elevation is H
0, H
1, H
2pebble beach backfill section bottom backfill building stones elevation of top surface and time top layer backfill building stones elevation of top surface respectively; H is design pebble beach beach berm elevation of top surface H and seabed root elevation H
0the discrepancy in elevation; Design pebble beach beach berm width is B, and the cobble particle diameter intending backfill pebble beach top layer is D, wherein H, H
0, H
1, H
2, B unit is m, D unit is mm, agreement:
(1) H value is according to local design high-water, and considers that wave is in water front fragmentation, upper punch, the factor of climbing, and comprehensively determines; Generally be arranged on the elevation location of the above 100cm of design high-water;
(2) B value is according to the requirement of project construction function, and project appropriation budget is determined, is traditionally arranged to be 10 ~ 20m, or suitably increases width;
(3) D value provides recommended value according to Project Areas seashore annual mean wave height value, and the cobble of 30 ~ 100mm particle diameter is chosen in suggestion, does not generally select the cobble being greater than 150mm particle diameter; Concrete reference value is in table 1;
(4) hierarchical design of pebble beach section, repairs pebble beach section and adopts hierarchical design, general point three layers:
1. bottom: be backfilled to mean sea level position (H from present situation sea bottom surface
1);
2. middle level: be backfilled to design high-water position (H from bottom upper surface
2);
3. top layer: be backfilled to design beach berm elevation (H) from middle level upper surface;
Bottom backfill is two slabstones (the block stones of diameter about 20cm), the cobble (diameter is greater than 15cm, allows containing a certain amount of sand or rubble) that middle level backfill sorting is poor, particle diameter material is large or rubble (diameter 2 ~ 8cm), top layer backfills the cobble that sorting is better, meet design size grade scale;
(5) slope design of pebble beach section, particle diameter is greater than the ruckle of 2mm, and under Wave power effect, the grade of side slope of itself and contact with sea water is in 1:3 ~ 1:6 scope; Repairing pebble beach beach face seaward slope slope design is 1:5; Design beach berm end face presses 1:50 gradient low dip by bank to sea.
Bottom top width of the present invention is B/2; Described middle level top width is 2B/3.
The invention has the beneficial effects as follows, adopt the seabeach reinstatement works of this technical design, the cobble beach will taken on a certain scale after completion, seashore, offsetting or weaken wave, ocean current compared with the experiment material under strong power wave flow action to the direct souring of seashore, is better stablized in this seabeach; Strand pebble beach can strengthen the diversity of seabeach view, improves coast landscape grade.
Accompanying drawing explanation
Pebble beach Section Design schematic diagram under a kind of stronger Coastal Dynamic condition of Fig. 1.
In figure: 1. land, 2. backshore, 3. water front, 4. ocean, 5. sandy beach pebble beach intermediate zone, 6. present situation sea-bottom profile line, 7. sea wall, 8. top layer (boulder bed), 9. middle level (macadam), 10. bottom (two ragstone layers), 11. sandy beaches.
Detailed description of the invention
Pebble beach Section Design method under a kind of stronger Coastal Dynamic condition of the present invention, as shown in Figure 1, assuming that design pebble beach beach berm face and original shore protection intersection place elevation are H, sea wall root sea bottom surface elevation is H
0, H
1, H
2be respectively pebble beach section bottom and time top layer backfill building stones elevation of top surface; H is design pebble beach beach berm elevation of top surface H and seabed root elevation H
0the discrepancy in elevation; Design pebble beach beach berm width is B, and the cobble particle diameter intending backfill pebble beach top layer is D(H, H
0, H
1, H
2, B unit is m, D unit is mm), agreement:
(1) H value is according to local design high-water, and considers that wave is in water front fragmentation, upper punch, the factor of climbing, and comprehensively determines; Generally can be arranged on the elevation location of the above 1m of design high-water;
(2) B value is according to the requirement of project construction function, and project appropriation budget is determined;
Generally can be set to 10 ~ 20m, certain needs also suitably can increase width;
(3) D value provides recommended value according to Project Areas seashore annual mean wave height value, and in table 1, the cobble of 30 ~ 100mm particle diameter is chosen in suggestion, does not generally select the cobble being greater than 150mm particle diameter;
(4) hierarchical design of pebble beach section, considers that cobble price is higher, and from cost-saving consideration, we adopt hierarchical design to reparation pebble beach section, general point three layers:
1. bottom: bottom: be backfilled to mean sea level position (H from present situation sea bottom surface
1);
2. middle level: be backfilled to design high-water position (H from bottom upper surface
2);
3. top layer: be backfilled to design beach berm elevation (H) from middle level upper surface;
Bottom backfill is two slabstones (the block stones of diameter about 20cm), the cobble (diameter is greater than 15cm, allows containing a certain amount of sand or rubble) that middle level backfill sorting is poor, particle diameter material is large or rubble (diameter 2 ~ 8cm), top layer backfills the cobble that sorting is better, meet design size grade scale;
(5) slope design of pebble beach section, survey data on the spot according to correlative study achievement and natural pebble beach, particle diameter is greater than the ruckle of 2mm, and under Wave power effect, the grade of side slope of itself and contact with sea water is in 1:3 ~ 1:6 scope; According to our industry completed pebble beach reinstatement works profile monitoring data, repair the pebble beach seaward slope gradient about about 1:5 (the construction gradient is pressed 1:5 and controlled); Design beach berm end face presses 1:50 gradient low dip by bank to sea, more effectively can cut down the impact of the more unrestrained stream of punching to pebble beach and even seabeach, pebble beach rear like this.
Pebble beach section relevant parameter refers to Fig. 1.
Pebble beach section relevant parameter commonly uses numerical tabular in table 2.
Table 1 pebble beach section backfill cobble particle diameter and Project Areas offshore annual mean wave height respective value table
| Average annual wave height (H 1/10） | 0.3～0.5 | 0.5～0.7 | 07～1.0 | 1.0～1.5 | ＞1.5 |
| Cobble particle diameter | 30～60 | 40～70 | 50～80 | 60～120 | 80～150 |
Note: seashore average annual wave height unit in Project Areas is m, backfill cobble particle diameter unit is mm.
(unit is m) pebble beach Section Design relevant parameter accepted value table under the stronger Coastal Dynamic condition of table 2
Note: Bs, Hs, Bt, Ht represent that pebble beach section mesexine backfill stone surface is to extra large width, mesexine backfill stone surface elevation, bottom backfill stone surface to extra large width, bottom backfill stone surface elevation respectively; The gradient that pebble beach beach berm tilts towards sea that S represents (top layer); S represents (top layer) pebble beach beach face (tilt to sea, be connected with the original beach face domatic) gradient; H represents pebble beach section beach berm gross thickness.
Below in conjunction with accompanying drawing 1, the present invention is further described.
In Fig. 1, repair pebble beach and be generally arranged in strong power erosion coast, rear is connected with artificial shore protection, and section adopts back-filling in layers different-grain diameter block stone or cobble; Chiltern or aleuritic texture beach face can directly backfill, the beach face that mud is thicker, backfill building stones again after can suitably excavating.
In Fig. 1, repair pebble beach beach berm face elevation H and be generally positioned at the above 1m of Project Areas seashore design high-water, specifically suitably can adjust according to engineering construction actual conditions; Repair pebble beach beach berm face width degree and generally get 10 ~ 20m, suitably can widen according to actual demands of engineering, but should not 10m be less than.
In Fig. 1, pebble beach section three layer construction, i.e. bottom backfill two-piece stone, middle level backfills nongraded cobble or fritter stone, the cobble of better, the satisfied design Particle size requirements of top layer backfill good sorting, quality; The thickness of each layer, width and the gradient are with reference to the ratio setting of figure 1.
In Fig. 1, repair pebble beach construction beach berm and be set to 1:50 towards the extra large gradient, more effectively can cut down the washing away seabeach and rear seashore of the swash of wave on wave; Foreshore is 1:5 to the domatic gradient in sea, close with the natural pebble beach foreshore gradient.
In Fig. 1: 1. land, 2. backshore, 3. water front, 4. ocean, 5. sandy beach pebble beach intermediate zone, 6. present situation sea-bottom profile line, 7. sea wall, 8. top layer (boulder bed), 9. middle level (macadam), 10. bottom (two ragstone layers), 11. sandy beaches.
Other illustrate: this Section Design scheme considers that comprehensive benefit is arranged, if Project Areas cobble abundance, or capital expenditure is abundant, and section three layers backfill design can be considered to change into two-layer, or all backfill cobble, bank revetment function and the landscape effect of pebble beach are unaffected.
Claims (2)
1. the pebble beach Section Design method under stronger Coastal Dynamic condition, is characterized in that: design pebble beach beach berm face and original shore protection intersection place elevation are H, and sea wall root sea bottom surface elevation is H
0, H
1for pebble beach section bottom backfill building stones end face is high-rise, H
2for pebble beach section time top layer backfill building stones elevation of top surface; Design pebble beach beach berm width is B, and the cobble particle diameter intending backfill pebble beach top layer is D, wherein H, H
0, H
1, H
2, B unit is m, D unit is mm, agreement:
(1) H value is according to local design high-water, and considers that wave is in water front fragmentation, upper punch, the factor of climbing, and comprehensively determines; Be arranged on the elevation location of the above 1m of design high-water;
(2) B value is according to the requirement of project construction function, and project appropriation budget is determined, is set to 10 ~ 20m;
(3) D value provides recommended value according to Project Areas seashore annual mean wave height value, and the cobble of 30 ~ 100mm particle diameter is chosen in suggestion, does not select the cobble being greater than 150mm particle diameter;
(4) hierarchical design of pebble beach section, repair pebble beach section and adopt hierarchical design, divide three layers:
1. bottom: be backfilled to mean sea level (H from present situation sea bottom surface
1);
2. middle level: be backfilled to design high-water (H from bottom upper surface
2);
3. top layer: be backfilled to design beach berm elevation (H) from middle level upper surface;
Bottom backfill is two slabstones, the cobble that middle level backfill sorting is poor, particle diameter material is large or rubble, the cobble of better, the satisfied design size grade scale of top layer backfill sorting;
(5) slope design of pebble beach section, particle diameter is greater than the ruckle of 2mm, and under Wave power effect, the grade of side slope of itself and contact with sea water is in 1:3 ~ 1:6 scope; Repair the pebble beach seaward slope gradient and press 1:5 control; Design beach berm end face presses 1:50 gradient low dip by bank to sea.
2. a kind of pebble beach Section Design method according to claim 1 under stronger Coastal Dynamic condition, is characterized in that: described bottom top width is B/2; Described middle level top width is 2B/3.
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Cited By (7)
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| CN105804006A (en) * | 2016-05-16 | 2016-07-27 | 中国海洋大学 | Lake shoal protective structure giving consideration to landscapes |
| CN106767723A (en) * | 2016-11-29 | 2017-05-31 | 山东大学 | A kind of model assay systems and method for following the trail of wave configuration of surface |
| CN108121888A (en) * | 2018-02-06 | 2018-06-05 | 水利部交通运输部国家能源局南京水利科学研究院 | The analysis method of sandy beach intertidal zone section equilibrium gradient |
| CN108399305A (en) * | 2018-03-12 | 2018-08-14 | 国家海洋局第三海洋研究所 | A kind of vigorous erosion exposed bank section seabeach Maintenance Design method |
| CN111549721A (en) * | 2020-05-20 | 2020-08-18 | 浙江水利水电学院 | Seawall banket reinforced structure with wave dissipation function |
| CN111967145A (en) * | 2020-07-28 | 2020-11-20 | 自然资源部第三海洋研究所 | Beach maintenance profile design method for reducing beach surface wind and sand strength |
| CN116368983A (en) * | 2023-03-29 | 2023-07-04 | 自然资源部第三海洋研究所 | Coastal sand dune repairing and maintaining method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804006A (en) * | 2016-05-16 | 2016-07-27 | 中国海洋大学 | Lake shoal protective structure giving consideration to landscapes |
| CN105804006B (en) * | 2016-05-16 | 2018-03-09 | 中国海洋大学 | A kind of shore-beach protection structure for taking into account landscape |
| CN106767723A (en) * | 2016-11-29 | 2017-05-31 | 山东大学 | A kind of model assay systems and method for following the trail of wave configuration of surface |
| CN108121888A (en) * | 2018-02-06 | 2018-06-05 | 水利部交通运输部国家能源局南京水利科学研究院 | The analysis method of sandy beach intertidal zone section equilibrium gradient |
| CN108121888B (en) * | 2018-02-06 | 2021-06-01 | 水利部交通运输部国家能源局南京水利科学研究院 | Analysis method for cross section balance gradient of beach intertidal zone |
| CN108399305A (en) * | 2018-03-12 | 2018-08-14 | 国家海洋局第三海洋研究所 | A kind of vigorous erosion exposed bank section seabeach Maintenance Design method |
| CN108399305B (en) * | 2018-03-12 | 2021-06-29 | 自然资源部第三海洋研究所 | Design method for maintenance of beach on exposed bank section with strong erosion |
| CN111549721A (en) * | 2020-05-20 | 2020-08-18 | 浙江水利水电学院 | Seawall banket reinforced structure with wave dissipation function |
| CN111967145A (en) * | 2020-07-28 | 2020-11-20 | 自然资源部第三海洋研究所 | Beach maintenance profile design method for reducing beach surface wind and sand strength |
| CN111967145B (en) * | 2020-07-28 | 2022-07-12 | 自然资源部第三海洋研究所 | Beach maintenance profile design method for reducing beach surface wind and sand strength |
| CN116368983A (en) * | 2023-03-29 | 2023-07-04 | 自然资源部第三海洋研究所 | Coastal sand dune repairing and maintaining method |
| CN116368983B (en) * | 2023-03-29 | 2023-11-28 | 自然资源部第三海洋研究所 | Coastal sand dune repairing and maintaining method |
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Application publication date: 20160203 |