CN111335100A

CN111335100A - Embankment structure suitable for coastal region and construction method thereof

Info

Publication number: CN111335100A
Application number: CN202010319960.XA
Authority: CN
Inventors: 陈胜超; 史宇宙; 胡永富; 郭锐; 陈杰
Original assignee: Zhejiang Provincial Institute of Communications Planning Design and Research Co Ltd
Current assignee: Zhejiang Provincial Institute of Communications Planning Design and Research Co Ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-06-26

Abstract

The application provides an embankment structure suitable for coastal areas and a construction method thereof, and relates to the field of crossing design of highways and seawall structures. The embankment structure comprises a first cushion layer, and a main body structure, a pressing platform and a stone throwing platform which are respectively arranged on the first cushion layer. The main structure comprises an embankment body, an outer side impervious wall, a road structure and an inner side impervious wall which are sequentially connected from the outer sea side to the inner sea side of the embankment structure, wherein both the outer side impervious wall and the inner side impervious wall are provided with vegetation layers, the pressing platform is connected with one side of the embankment body, which is far away from the outer side impervious wall, higher than the average high tide level of the embankment structure at the outer sea side, and the riprap platform is connected with one side of the inner side impervious wall, which is far away from the road structure. The construction method of the embankment structure is controllable in operation, the obtained embankment structure effectively ensures the stability of the main body structure, meanwhile, the impact and the erosion of wind waves and tides are effectively prevented, the service life of the embankment structure is prolonged, and the problem that the driving landscape of the traditional embankment is poor is solved.

Description

Embankment structure suitable for coastal region and construction method thereof

Technical Field

The application relates to the field of crossing design of highways and sea wall structures, in particular to an embankment structure suitable for coastal areas and a construction method thereof.

Background

Along with the development of social economy, the economic activities of human beings become frequent, the construction density of coastal engineering is increased, and the mutual influence and mutual interference restriction of the coastal engineering are serious and complex. The embankment combination engineering is a common composite road engineering form in coastal areas at present, the trend of the road is approximately consistent with that of a coast, and the road traffic function and the sea embankment wave and water prevention function are considered. At present, the embankment combination structure mainly comprises an embankment rear road and an embankment top road. The road in the rear road of the dike is arranged at the rear (the backwater side) of the dike, and the road elevation is generally lower than the elevation of the top of the dike; the embankment top road is a fully combined form of the embankment, the embankment body is used as a roadbed of the road, and the elevation of the road is the same as that of the embankment top.

In recent years, cities in coastal areas of China develop at a high speed, and the demand on regional water ecological civilization is higher and higher. However, the conventional water retaining structure such as a sea wall only considers the protection function of the land at the rear, the soft soil layer in the coastal region is thick, the geological condition is poor, the impact and erosion effects of wind waves and tides are very strong, and if an effective protection measure is lacked, the structure is easily damaged or unstable. How to achieve the purpose of adjusting to local conditions, the engineering requirements of roads are organically coordinated with the ecological environment, natural conditions and public activities of the coastal areas into a whole, and the ecological benefits and the environmental benefits of the project are brought into play to the maximum extent on the premise of meeting the functions of wave prevention, water retaining and traffic, so that the engineering problem to be solved is urgent.

Disclosure of Invention

An object of an embodiment of the present invention is to provide a dike structure suitable for a coastal region and a construction method thereof, which can effectively improve the above-mentioned problems.

In a first aspect, an embodiment of the present application provides a embankment structure suitable for a coastal region, which includes a first cushion layer, and a main body structure, a pressing platform, and a riprap platform, which are respectively disposed on the first cushion layer.

The main structure comprises an embankment body, an outer side impervious wall, a road structure and an inner side impervious wall which are sequentially connected from the outer sea side to the inner sea side of the embankment structure, wherein the embankment body comprises a first body obtained by riprap filling, and a wave-preventing structure and a road surface structure which are arranged on the first body and are sequentially connected from the outer sea side to the inner sea side, the road surface structure is lower than the wave-preventing structure, the outer side impervious wall and the inner side impervious wall are both provided with vegetable layers, and the road structure is provided with a drainage system.

The pressing platform is connected with one end, far away from the outer side impervious wall, of the first body, and the height of the pressing platform is lower than the wave-preventing structure and higher than the average high tide level of the embankment structure on the outer sea side.

The stone throwing platform is connected with one side of the inner impervious wall far away from the road structure.

In the above-mentioned realization process, set up respectively in major structure's both sides through suppression platform and riprap platform, improve the structural load mode effectively and guarantee major structure stability, suppression platform and wave-proof structure cooperation simultaneously, can effectively prevent the impact and the erosion of stormy waves and trend to dyke body, road structure etc. improve its life, and the setting of outside cut-off wall and inboard cut-off wall, can prevent the sea water infiltration road structure on the one hand, improve road structure's stability and durability, on the other hand vegetation layer's setting, the problem that traditional dyke way back road driving view is not good enough has been improved, the ecological effect of dyke way structure has been improved.

In a possible embodiment, the outer impervious wall and the inner impervious wall each comprise a body and an impervious film layer, the body is formed by filling airtight soil, and the impervious film layer wraps the side wall and the bottom wall of the body and is tightly connected with the embankment body, the corresponding road structure and the corresponding riprap platform.

In the implementation process, the gas-tight soil and the anti-seepage film layer are arranged, so that the seawater is effectively prevented from permeating.

Optionally, the gas-occlusive soil comprises silt clay.

Wherein, silt matter clay is the common soil property in coastal area, the in-process of actual construction embankment structure, need clear away surface earthwork and foundation ditch excavation earthwork, cause the abandonment and the extra treatment cost of silt matter clay, in this application, utilize the less characteristics of its permeability to regard it as the closed air soil, combine the prevention of seepage rete, can prevent outside sea water infiltration effectively, and silt matter clay organic matter content is higher, can regard as good planting green soil, do not need additionally to lay planting soil, the ecological effect of structure has not only been improved greatly, the cost of manufacture has still been reduced.

In one possible embodiment, the end of the external cutoff wall adjacent to the embankment body is higher than the end of the external cutoff wall adjacent to the road structure, and the drainage system comprises: and the drainage ditch is arranged at the joint of the outer impervious wall and the road structure and is arranged along the extending direction of the road structure.

In the implementation process, the drainage ditch is used for collecting the surface water of the outer side impervious wall and the road structure, the structure is more compact, and meanwhile, the mode that the outer side impervious wall is obliquely arranged is used for ensuring that the surface water can smoothly enter the drainage ditch under the action of gravity, so that the retention time of the surface water on the surface of the outer side impervious wall is shortened, and the water seepage is reduced.

In a possible embodiment, one end of the inner impervious wall close to the road structure is higher than one end of the inner impervious wall close to the riprap platform, a concrete prefabricated front edge arranged along the extending direction of the road structure and a hollow brick layer used for planting a vegetation layer are arranged on the surface of the inner impervious wall, and the concrete prefabricated front edge is arranged at one end of the outer impervious wall close to the road structure.

In the implementation process, the structural stability of the prefabricated front edge is guaranteed by the aid of the design of the prefabricated front edge, meanwhile, the durability of the prefabricated front edge under seawater scouring on the inner sea side can be improved, and further, the slope section protection structure is formed by the cooperation of the hollow bricks and the prefabricated front edge, and the durability of the prefabricated front edge under seawater scouring on the inner sea side is further improved.

In a possible embodiment, the surface of suppression platform is equipped with first armor layer, first body includes the domatic section that connects gradually from the direction of open sea side to the internal sea side, platform and bank top section, wherein domatic section slope sets up and is not higher than the platform, the platform is less than and forms the step that is used for installing the breakwater structure between the lateral wall of bank top section and the roof of platform, pavement structure sets up in the bank top section, the surface of domatic section and platform is equipped with the second armor layer, the second armor layer is equipped with vertical arrangement's exhaust hole.

In the implementation process, the scouring of the sea water on the open sea side to the press platform and the embankment body is further reduced through the arrangement of the second protective surface layer, and the service life of the sea water is prolonged.

Optionally, the wave structure comprises a bottom plate, a poured block stone retaining wall and a reinforced concrete wave wall.

The bottom plate is connected with the second surface protection layer and tightly abutted against the side wall of the top section of the embankment, and the bottom wall of the bottom plate is provided with a tooth wall which is used for being embedded in the first body to limit.

The block stone filling retaining wall is vertically fixed on the upper surface of the bottom plate and tightly propped against the side wall of the embankment top section.

The reinforced concrete wave wall is connected with the upper surface of the filling block stone retaining wall and extends out of the pavement structure, the root of the reinforced concrete wave wall is provided with a water drainage hole, and one end of the reinforced concrete wave wall, which is far away from the filling block stone retaining wall, inclines to the outer sea side.

Through the above arrangement mode, the wave-proof effect is guaranteed to be good.

In a possible embodiment, before the soft foundation treatment is performed on the coastal region corresponding to the main structure, the embankment structure further comprises a second cushion layer, and the second cushion layer is positioned on the lower side of the main structure corresponding to the first cushion layer.

In the above-mentioned realization process, handle through soft base and suppress the cooperation of platform and riprap platform, effectively improve the stability of dyke way structure, simultaneously through the setting of second bed course, can provide a construction operation platform, construction machinery approach operation when being convenient for construct.

In a second aspect, an embodiment of the present application provides a method for constructing an embankment structure suitable for a coastal region, including:

after the first bed course of the suppression platform and the riprap platform is corresponded in the construction, the suppression platform of filling the outer sea side and the riprap platform of the inner sea side are thrown.

And paving and filling a first cushion layer corresponding to the main body structure, filling and rolling the compact embankment body, the outer impervious wall, the road structure and the inner impervious wall, and then constructing the wave-preventing structure, the drainage system, the pavement embankment top road surface structure and the road surface of the road structure.

And constructing vegetable layers of the outer side impervious wall and the inner side impervious wall.

In the implementation process, the steps are utilized for construction, the suppression platform and the riprap platform are utilized for separating seawater for main body construction, the operation is controllable, simple and convenient, and the embankment structure suitable for coastal areas is obtained.

In a possible embodiment, the embankment structure comprises a first armor layer arranged on the press platform and a second armor layer arranged on the embankment body, and the construction method comprises the following steps before the construction of the wave-breaking structure: and after the compact embankment body, the outer side impervious wall, the road structure, the inner side impervious wall and the riprap platform are filled and rolled, and after the pre-pressing and the sedimentation are basically stable, constructing a first protective surface layer and a second protective surface layer.

Through the pre-compaction, subside after stable basically, the mode of constructing first armor layer and second armor layer again can guarantee the stability that first armor layer and suppression platform are connected to and the stability that second armor layer and dyke body are connected, and then guarantee the stability and the durability of whole dyke way structure.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a bank structure according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a dyke body according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a wave-breaking structure according to an embodiment of the present application.

Icon: 10-embankment structure; 100-a first cushion layer; 101-pressing the top layer with bagged macadam; 103-high-strength woven geotextile layer; 105-a first gravel cushion; 106-a woven geotextile layer; 110-a second underlayer; 120-dyke body; 121-a first body; 123-pavement structure; 1251-building a stone layer; 1253-second gravel cushion layer; 126-vent hole; 127-wave-protection structure; 1271-a bottom plate; 1272-tooth wall; 1274-filling block stone retaining wall; 1275-base; 1276-flume; 1278-wave wall; 1279-weep holes; 130-outside diaphragm wall; 131-a vegetable layer; 133-a second body; 135-an impermeable film layer; 137-drainage ditch; 140-inside impervious wall; 141-precast concrete front edge; 143-hollow brick layer; 150-a road structure; 151-base body; 153-facing; 155-a base layer; 157-an underlayer; 180-compacting the platform; 181-concrete lattice beam; 183-first armor layer; 190-a riprap platform; 191-feet protection.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

The embankment structure comprises an outer sea side and an inner sea side, wherein the outer sea side refers to a side facing the sea, and the inner sea side refers to a side facing the land, and the inner sea side can be land or a shallow bay and has certain seawater, but the water level is not high and the wind waves are small. Based on the above setting, the embankment structure suitable for coastal areas provided by the present application is specifically described.

Examples

Referring to fig. 1, the present embodiment provides a embankment structure 10 suitable for use in coastal areas, which includes a first bedding layer 100, and a main body structure, a pressing platform 180 and a stone throwing platform 190 respectively disposed on the first bedding layer 100.

The first cushion layer 100 comprises a bagged broken stone top-pressing layer 101, a high-strength woven geotextile layer 103, a first broken stone cushion layer 105 and a woven geotextile layer 106 which are sequentially overlaid from a position far away from the ground to a position close to the ground (namely from top to bottom), wherein the strength of the high-strength woven geotextile layer 103 is higher than that of the woven geotextile layer 106, the thickness of the bagged broken stone top-pressing layer 101 is 40cm, the thickness of the first broken stone cushion layer 105 is 60cm, the surface of the first broken stone cushion layer 105 is basically flat, and the position where the first broken stone cushion layer 105 needs to be thrown cannot be thrown or thrown less.

It should be noted that when the edges of the high-strength woven geotextile layer 103 and the woven geotextile layer 106 need to be lapped, the lapping width needs to be larger than 50cm, and high-strength nylon yarns or polyester yarns are adopted for seaming, so that the integrity of the lapped high-strength woven geotextile layer 103 and the lapped woven geotextile layer 106 is ensured to be good.

It should be noted that, when the foundation of the region where the embankment structure 10 is located is good and does not need special treatment, the first cushion layer 100 may be directly disposed on the ground, but the general geological condition of the region where the embankment structure 10 is located is poor, and soft foundation treatment is required, so that the stability of the embankment structure 10 can be ensured. The mode of soft foundation treatment can refer to the related art, and is not limited in the application.

Therefore, taking this embodiment as an example, when the coastal region corresponding to the main structure needs to be subjected to soft foundation treatment, before the soft foundation treatment, the embankment structure 10 further includes the second cushion layer 110, and the second cushion layer 110 is located at the lower side of the main structure corresponding to the first cushion layer 100, so that the structural load manner can be effectively improved by the pressing platform, and the stability of the embankment structure 10 can be greatly ensured by combining with effective soft foundation treatment measures.

The second cushion layer 110 is composed of a composite geotextile layer and a graded crushed stone layer, wherein the composite geotextile layer is laid below the graded crushed stone layer, and the specific thickness of the graded crushed stone layer can be determined or adjusted according to the field situation, which is not limited herein.

The main structure comprises a dike body 120, an outer impervious wall 130, a road structure 150 and an inner impervious wall 140 which are connected in sequence from the open sea side to the inner sea side of the dike structure 10.

Referring to fig. 1 and 2, the embankment body 120 includes a first body 121, a wave-preventing structure 127, and a road surface structure 123.

First body 121 is filled by riprap and is rolled closely knit back gained, and first body 121 includes domatic section, platform and the bank top section that the direction from the open sea side to the internal sea side connected gradually, and wherein domatic section slope sets up and is not higher than the platform, and the platform is less than and forms the step between the lateral wall of bank top section and the roof of platform. The slope section, the platform and the bank top section are integrally formed, and the specific construction mode can refer to the related technology and is not described in detail herein.

The surface of the slope surface section and the surface of the platform are provided with second protective surface layers. The second armor layer comprises a tiled poured stone layer 1251 and a second gravel cushion layer 1253. The gaps of the stone poured blocks are filled with C20 fine stone concrete, the thickness of the second gravel cushion layer 1253 is 30cm, for example, and the stone poured blocks 1251 are laid above the second gravel cushion layer 1253.

Meanwhile, the second protective layer is provided with vent holes 126, the vent holes 126 are vertically arranged, and then the vent holes discharge air below the second protective layer, so that the balance of air pressure inside and outside the second protective layer is kept.

The second armor layer is equipped with the concrete grider 181 of arranging along the extending direction of dyke structure, specifically, concrete grider 181 is arranged in the domatic section of first body, specifically, concrete grider 181 includes two sets ofly, and a set of concrete grider 181 is located the one end that domatic section and platform are connected, and another set of concrete grider 181 is located the link that is located first armor layer and second armor layer, effectively improves the stability of second armor layer when the sea water of seaside erodees under the above-mentioned setting condition. Wherein, the concrete lattice beam 181 adopts C25 concrete cast-in-place.

Road surface structure 123 sets up in the top of slope section, and road surface structure 123 can regard as the current road of operation period inspection and maintenance vehicle, makes things convenient for inspection and maintenance. Since the above-described use of the pavement structure 123 does not involve large transportation, the pavement structure 123 is a cement concrete pavement structure 123 for cost saving and construction convenience.

The wave-proof structure 127 is arranged on the step and extends out of the step, that is, the road surface structure 123 is lower than the wave-proof structure 127, that is, the wave-proof structure 127 and the road surface structure 123 are connected in sequence from the open sea side to the inner sea side.

Specifically, referring to fig. 2 and 3, the wave structure 127 includes a bottom plate 1271, a grouted block stone retaining wall 1274, and a reinforced concrete wave wall.

Bottom plate 1271 is connected with the lateral wall of second armor layer, slope top section respectively, and the diapire of bottom plate 1271 is equipped with and is used for inlaying and locates and carry out spacing dentate wall 1272 in the first body, through the cooperation of dentate wall 1272 with the lateral wall of slope top section, carries out horizontal spacing to bottom plate 1271, guarantees the stability that wave structure 127 is being erodeed by extra large side sea water. The bottom plate 1271 is a concrete bottom plate 1271, and in the embodiment, the bottom plate 1271 is poured by C20 concrete, the thickness is 50cm, and the strength of the bottom plate 1271 is effectively improved.

The filling block stone retaining wall 1274 is vertically fixed on the upper surface of the bottom plate 1271 and tightly abutted against the side wall of the slope top section, and one side of the filling block stone retaining wall 1274 far away from the slope top section is a slope surface. Through domatic setting, slow down the dynamics of scouring away, be convenient for simultaneously with the sea water discharge after heavily brushing.

The masonry retaining wall 1274 is formed by filling masonry with C20 fine stone concrete, wherein the masonry is fresh and complete, has no cracks, does not contain mud, has no weathering cracks, has good seawater corrosion resistance and has two rubbles which are approximately parallel to the plane. The combination of the C20 fine stone concrete and the masonry stones ensures the strength of the grouted masonry retaining wall 1274 and prolongs the service life of the grouted masonry retaining wall. The reinforced concrete wave wall comprises a base 1275 and a wave wall 1278 arranged on the top wall of the base 1275, the base 1275 is connected with the upper surface of the filling block stone retaining wall 1274, and the wave wall 1278 extends out of the top section of the embankment (namely, the wave wall 1278 is higher than the pavement structure 123).

The end of the reinforced concrete wave wall far away from the filling block stone retaining wall 1274 inclines to the outer sea side, specifically, the side of the wave wall 1278 near the outer sea side is a cambered surface, and the end of the cambered surface far away from the base 1275 extends towards the outer sea side, so that the wave prevention effect is good.

The base 1275 is provided with a water flowing groove 1276, the water flowing groove 1276 is arranged on the base 1275 and is positioned at one end of the wave wall 1278 close to the pavement structure 123, the water flowing groove 1276 is arranged along the extending direction of the embankment structure 10, furthermore, even if partial waves cross the wave wall 1278 under extreme conditions, the partial waves flow into the water flowing groove 1276 to be collected, and meanwhile, the water flowing groove 1276 can collect accumulated water of the pavement structure and discharge the accumulated water.

In order to facilitate the water in the water discharging tank 1276 to be discharged, prevent water accumulation and avoid other treatment, a drain hole 1279 is arranged at the root of the reinforced concrete wave wall, one end of the drain hole 1279 is communicated with the water flowing tank 1276, the other end of the drain hole 1279 extends towards the outer sea side and extends out of the base 1275 and/or the wave wall 1278, one end of the drain hole 1279 close to the water flowing tank 1276 is higher than one end of the drain hole 1279 far away from the water flowing tank 1276, namely, the drain hole 1279 is obliquely arranged, for example, the slope inclines outwards by 6%.

It should be noted that the air outlet 126 is a PVC hard pipe and is arranged in a quincunx shape, the distance is 3m, the water outlet 1279 is horizontally arranged, and the distance is 5 m.

Meanwhile, optionally, the upper surface of the pavement structure 123 is flush with the upper surface of the base 1275 or slightly higher (not greater than 10cm) than the upper surface of the base 1275, thereby ensuring that surface water of the pavement structure 123 is discharged to the open sea through the water discharge holes 1279, preventing water accumulation and water seepage.

The reinforced concrete wave wall can be cast in situ by using C35 marine durable concrete, and is not limited herein.

Both the outer cutoff wall 130 and the inner cutoff wall 140 are provided with a vegetation layer 131. That is, both sides of the road structure 150 are provided with the vegetation layer 131, so that the ecological effect is improved, and meanwhile, the vegetation layer 131 also has a certain noise reduction effect.

Specifically, each of the outer cut-off wall 130 and the inner cut-off wall 140 includes a second body 133 and a cut-off film layer 135, the second body 133 is formed by filling closed air, and the cut-off film layer 135 wraps the side wall and the bottom wall of the second body 133 and is tightly connected to the embankment body 120, the corresponding road structure 150 and the corresponding riprap platform 190. The impermeable membrane layer 135 is, for example, an impermeable geotextile layer, and the cooperation of the gas-tight soil and the impermeable membrane layer 135 is utilized to make the internal water seepage blocked by the outer impermeable wall 130 and the inner impermeable wall 140 respectively, so as to prevent the water from permeating into the road structure 150, ensure the stability of the road structure 150, and prevent the collapse caused by the water seepage.

The applicant finds that the silty clay is common soil in coastal areas, and in the actual process of constructing the embankment structure 10, surface soil or foundation pit excavation earthwork needs to be removed to cause the abandonment and extra treatment cost of the silty clay, so that in the application, the gas-tight soil comprises the silty clay, the silty clay is used as the gas-tight soil by utilizing the characteristic of small permeability, the seepage-proof film layer 135 is combined, internal water seepage can be effectively blocked, the content of organic matters in the silty clay is high, the silty clay can be used as good greening planting soil, planting soil does not need to be additionally laid, the ecological effect of the structure is greatly improved, and the cost is reduced.

Further optionally, one end of the outer cut-off wall 130 adjacent to the embankment body 120 is higher than one end of the outer cut-off wall 130 adjacent to the road structure 150, which has a drainage system; the drainage system includes: and a drainage ditch 137 provided at a junction of the outer cutoff wall 130 and the road structure 150 and arranged in an extending direction of the road structure 150, a bottom wall of the drainage ditch 137 being lower than an upper surface of the road structure 150. That is, the drainage ditch 137 can be used for collecting the surface water of the outer side impervious wall 130 and the road structure 150 at the same time, the structure is more compact, and meanwhile, the surface water can be ensured to smoothly enter the drainage ditch 137 through the action of gravity by using the mode that the outer side impervious wall 130 is obliquely arranged, so that the retention time of the surface water on the surface of the outer side impervious wall 130 is reduced, and the water seepage is reduced.

Wherein the drainage ditch 137 is provided in the form of a gutter cover in order to further secure safety and aesthetic appearance.

One end of the inner impervious wall 140 close to the road structure 150 is higher than one end of the inner impervious wall 140 close to the riprap platform 190, a concrete prefabricated flap 141 arranged along the extending direction of the road structure 150 and a hollow brick layer 143 for planting the vegetation layer 131 are arranged on the surface of the inner impervious wall 140, and the concrete prefabricated flap 141 is arranged at one end of the outer impervious wall 130 close to the road surface structure 123. That is, the prefabricated concrete flap 141 and the hollow brick layer 143 are used to effectively cover the surface of the inner cut-off wall 140, and it should be noted that a part of the prefabricated concrete flap 141 is embedded in the inner cut-off wall 140. The design of the precast concrete front edge 141 is utilized to ensure the structural stability, meanwhile, the durability of the precast concrete front edge under the seawater scouring of the inland sea side can be improved, further, the arrangement of the hollow brick layer 143 is matched with the precast concrete front edge 141 to form an anti-scouring structure, and the durability of the precast concrete front edge under the seawater scouring of the rainwater or the inland sea side is further improved. The precast concrete flap 141 can be cast in place by C25 concrete. The hollow brick layer 143 is formed by splicing a plurality of hollow bricks, such as hexagonal hollow bricks, and the wave-proof effect is better.

Based on the above, because the inner side impervious wall 140 is different from the outer side impervious wall 130, the vegetation layer 131 disposed on the inner side impervious wall 140 and the outer side impervious wall 130 is also different, wherein the vegetation layer 131 disposed on the inner side impervious wall 140 is a grass pot or the like planted in the hexagonal hollow brick, and the vegetation layer 131 of the outer side impervious wall 130 can be doped with trees and the grass pot.

The road structure soil-stone mixture is filled to form a base 151 of the road structure, the base 151 is connected with the outer impervious wall 130 and the inner impervious wall 140, and the upper surface of the base 151 sequentially comprises a surface layer 153, a base layer 155 and a sub-base layer 157 which are stacked from top to bottom. Wherein, the both sides of road structure 150 can set up crash barrier etc. according to the demand of reality.

The pressing platform 180 is connected to one side of the embankment body 120 far away from the outer impervious wall 130, specifically, the pressing platform 180 is connected to the slope section, and the pressing platform 180 is lower than the plane section. The ballast platform 180 is at a height below the wave structure 127 and above the average high tide level at the offshore side of the embankment structure 10. The average high tide level at the open sea side is the average height of the high tide level at the open sea side.

The compacting platform 180 is filled by riprap and compacted, wherein, for the good effect of guaranteeing to prevent erosion, the surface of compacting platform 180 is equipped with first armor layer 183.

Wherein the first armor layer 183 is formed of a plurality of large stone stones.

Wherein the thickness of the large stone is 80cm, and the single weight of the large stone is not less than 200 kg. That is, the compacting platform 180 is protected by using a large stone projectile, so that the impact and erosion of wind waves and tides can be prevented. Meanwhile, the ballast platform 180 can also be used as a construction access and a cofferdam.

The riprap platform 190 is connected with one end of the inner impervious wall 140 far away from the road structure 150, wherein the riprap platform 190 is not higher than one side of the inner impervious wall 140 far away from the road structure 150, so that water on the road surface can directly flow to the inner sea side through the inner impervious wall 140 and the riprap platform 190.

The riprap platform 190 is filled by riprap, and the surface of the riprap platform 190 is provided with a protection leg 191, specifically, the protection leg 191 is located at the joint of the riprap platform 190 and the inner side concrete, and then the stability of the hollow brick layer 143 and the riprap platform 190 is further ensured through the protection leg 191.

Note that when the soft foundation treatment is required, the first mat layer 100 is filled in two steps.

The present application also provides a method of constructing an embankment structure 10 suitable for use in coastal areas, comprising:

s1, after constructing a first cushion layer 100 corresponding to the pressing platform 180 and a first cushion layer 100 corresponding to the stone throwing platform 190, throwing and filling the pressing platform 180 and the stone throwing platform 190 on the overseas side. Utilize first construction suppression platform 180 and riprap platform 190 in order to cut off interior sea side sea water and open sea side sea water, be convenient for follow-up construction major structure and guarantee the stability of follow-up main part construction.

S2, paving and filling a second cushion layer 110 corresponding to the main body structure: specifically, a composite geotextile layer is laid firstly, and then a graded crushed stone layer is filled, wherein the specific thickness of the graded crushed stone layer can be determined or adjusted according to the field condition.

S3, selecting reasonable soft foundation treatment measures according to the engineering general situation, the geological condition, the structural characteristics and the like, performing soft foundation treatment on the position corresponding to the main body structure, and then paving and filling a first cushion 100 corresponding to the main body structure on a second cushion 110 after the soft foundation treatment, wherein the first cushion 100 is specifically paved by the following steps: firstly laying a layer of woven geotextile 106, then filling a first gravel cushion layer 105, then laying a layer of high-strength woven geotextile 103, specifically, when the woven geotextile is laid and the width of the high-strength woven geotextile is lapped, the lapping width is more than 50cm, high-strength nylon yarns or polyester yarns are adopted for seaming, and then the bagged gravel layer is thrown and filled for 40cm, thus completing the setting of the first cushion layer 100.

And S4, filling and rolling the compact embankment body 120, the outer side impervious wall 130, the road structure 150 and the inner side impervious wall 140, and constructing a first protective surface layer 183 and a second protective surface layer after pre-pressing and settlement are basically stable, wherein the first protective surface layer 183 is connected with the second protective surface layer, namely the second protective surface layer is not arranged at the part of the slope surface section directly connected with the pressing platform.

And S5, constructing a wave-preventing structure 127, a drainage system, a paving embankment top pavement structure 123 and a pavement of the road structure 150.

And S6, constructing the vegetation layer 131 of the outer impervious wall 130 and the inner impervious wall 140.

In conclusion, the construction method of the embankment structure suitable for the coastal region provided by the application is controllable and simple to operate, the obtained embankment structure suitable for the coastal region effectively improves the structural load mode and ensures the stability of the main structure through structural change, the impact and erosion of wind waves and tide on an embankment body, a road structure and the like are effectively prevented, the service life of the embankment structure is prolonged, and the ecological effect of the embankment structure is improved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The embankment structure suitable for the coastal region is characterized by comprising a first cushion layer, and a main body structure, a suppression platform and a stone throwing platform which are respectively arranged on the first cushion layer;

the main body structure comprises an embankment body, an outer impervious wall, a road structure and an inner impervious wall which are sequentially connected from the open sea side to the inner sea side of the embankment structure, wherein the embankment body comprises a first body obtained by filling riprap, and a wave-proof structure and a road surface structure which are arranged on the first body and are sequentially connected from the open sea side to the inner sea side, the road surface structure is lower than the wave-proof structure, the outer impervious wall and the inner impervious wall are both provided with vegetation layers, and the road structure is provided with a drainage system;

the pressing platform is connected with one end, far away from the outer side impervious wall, of the first body, the height of the pressing platform is lower than that of the wave-preventing structure, and the height of the pressing platform is higher than the average high tide level of the embankment structure on the outer sea side;

the stone throwing platform is connected with one side, far away from the road structure, of the inner side impervious wall.

2. The embankment structure suitable for coastal areas according to claim 1, wherein said external impervious wall and said internal impervious wall each comprise a body made of airtight soil filled, and an impervious film layer wrapping the side walls and the bottom wall of said body and tightly connected with said embankment body, the corresponding road structure and the corresponding said riprap platform.

3. An embankment structure suitable for use in coastal areas according to claim 2, wherein said gas-occlusive soil comprises argillaceous clay.

4. An embankment structure suitable for use in coastal areas according to claim 1, wherein one end of said outer impermeable wall close to said embankment body is higher than one end of said outer impermeable wall close to the road structure, said drainage system comprising: and the drainage ditch is arranged at the joint of the outer side impervious wall and the road structure and is arranged along the extending direction of the road structure.

5. An embankment structure suitable for use in coastal areas according to claim 1, wherein one end of said inner impervious wall close to said road structure is higher than one end of said inner impervious wall close to a riprap platform, and the surface of said inner impervious wall is provided with a precast concrete flap arranged along the extending direction of said road structure and a hollow brick layer for planting said vegetation layer, said precast concrete flap being provided at one end of said outer impervious wall close to a road surface structure.

6. The embankment structure suitable for coastal areas according to any one of claims 1 to 5, wherein said first body comprises a slope surface section, a platform and a top wall section, which are connected in sequence from the offshore side to the offshore side, wherein the slope surface section is disposed at an incline and is not higher than said platform, said platform is lower than said top wall section and forms a step between the side wall of said top wall section and the top wall of said platform for installing said breakwater structure, said pavement structure is disposed on said top wall section, the surface of said slope surface section and said platform is provided with a second protective surface layer, and said second protective surface layer is provided with vertically arranged vent holes.

7. The embankment structure suitable for use in coastal areas according to claim 6, wherein said wave-breaking structure comprises:

the bottom plate is connected with the second protective layer and is tightly abutted against the side wall of the bank top section, and a tooth wall for limiting is arranged on the bottom wall of the bottom plate in an embedded mode in the first body;

the block stone filling retaining wall is vertically fixed on the upper surface of the bottom plate and is tightly abutted against the side wall of the bank top section;

reinforced concrete wave wall, with irritate the upper surface connection of building block stone barricade and stretch out the road surface structure, reinforced concrete wave wall's root sets up the outlet, reinforced concrete wave wall keeps away from irritate the slope of the one end outside sea side of building block stone barricade.

8. The embankment structure according to any one of claims 1 to 5, wherein said embankment structure further comprises a second pad layer disposed on the lower side of said first pad layer corresponding to said main structure before the soft foundation treatment is performed on the coastal region corresponding to said main structure.

9. A method of constructing a embankment structure suitable for use in coastal areas according to any one of claims 1 to 8, comprising:

after the first cushion layer corresponding to the pressing platform and the stone throwing platform is constructed, the pressing platform on the outer sea side and the stone throwing platform on the inner sea side are thrown and filled;

paving and filling a first cushion layer corresponding to the main body structure, filling and rolling the dyke body, the outer impervious wall, the road structure and the inner impervious wall tightly, and then constructing a wave-proof structure, a drainage system, a top road surface structure of the paving dyke and a road surface of the road structure;

10. The method for constructing an embankment structure suitable for coastal areas according to claim 9, wherein said embankment structure comprises a first armor layer disposed on said ballast platform and a second armor layer disposed on said embankment body, said method comprising, before constructing said wave structures: and after the embankment body, the outer side impervious wall, the road structure, the inner side impervious wall and the riprap platform are filled and rolled tightly, and after pre-pressing and stable settlement are carried out, the first facing layer and the second facing layer are constructed.