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

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 areas and its construction method

technical field

The present application relates to the field of intersection design of highways and seawall structures, in particular, to a road embankment structure suitable for coastal areas and a construction method thereof.

Background technique

With the development of society and economy, the economic activities of human beings are becoming more and more frequent, and the construction density of coastal engineering is also increasing. The embankment-road combination project is a common form of composite road engineering in coastal areas. The direction of the road is approximately the same as that of the coast. At present, there are two main forms of embankment-road combined structure: embankment-back road and embankment-top road. The road in the middle road behind the embankment is arranged behind the embankment (backwater side), and the elevation of the road is generally lower than the elevation of the top of the embankment; the road to the top of the embankment is a form of complete combination of the embankment and the road, and the embankment body is used as the roadbed of the road, and the elevation of the road is the same as that of the top of the embankment.

In recent years, with the rapid development of cities in coastal areas of my country, the requirements for regional water ecological civilization are getting higher and higher. However, traditional water-retaining structures such as seawalls usually only consider the protection function of the rear land area. The soft soil layer in coastal areas is thick, the geological conditions are poor, and the impact and erosion of wind, waves and currents are very strong. It is easy to cause structural damage or instability. How to adjust measures to local conditions, organically coordinate the engineering requirements of the road with the coastal ecological environment, natural conditions and public activities, and maximize the ecological and environmental benefits of the project on the premise of meeting the functions of preventing waves and water and traffic It is an engineering problem that needs to be solved urgently.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present application is to provide an embankment structure suitable for coastal areas and a construction method thereof, which can effectively improve the above problems.

In a first aspect, the embodiments of the present application provide an embankment structure suitable for coastal areas, which includes a first cushion layer, and a main structure, a suppression platform and a riprap platform respectively disposed on the first cushion layer.

The main structure includes the embankment body, the outer seepage prevention wall, the road structure and the inner seepage prevention wall sequentially connected from the outer sea side to the inner sea side of the embankment road structure. A wave-proof structure and a pavement structure connected in sequence from the outer sea side to the inner sea side on the main body, the pavement structure is lower than the wave-proof structure, the outer and inner seepage-proof walls are provided with vegetation layers, and the road structure has a drainage system.

The suppression platform is connected to one end of the first body away from the outer seepage-proof wall, and the height of the suppression platform is lower than the wave-proof structure and higher than the average high tide level of the embankment structure on the sea side.

The riprap platform is connected to the side of the inner anti-seepage wall away from the road structure.

In the above realization process, the suppression platform and the riprap platform are respectively arranged on both sides of the main structure, which can effectively improve the structural load mode and ensure the stability of the main structure. At the same time, the suppression platform and the anti-wave structure can effectively prevent wind, waves and tides. The impact and erosion of the embankment body and road structure can improve its service life, and the installation of the outer and inner anti-seepage walls can prevent seawater from infiltrating into the road structure, improve the stability and durability of the road structure, and on the other hand. On the one hand, the setting of the vegetation layer improves the problem of poor driving landscape of the traditional embankment road and improves the ecological effect of the embankment road structure.

In a possible embodiment, the outer seepage-proof wall and the inner seepage-proof wall both include a main body and an anti-seepage membrane layer, the main body is filled with air-tight soil, and the anti-seepage membrane layer wraps the side wall and bottom wall of the main body and is connected with the main body. The embankment body, the corresponding road structure and the corresponding riprap platform are closely connected.

In the above realization process, the infiltration of seawater can be effectively prevented by the setting of air-sealing soil and anti-seepage membrane layer.

Optionally, the closed air soil includes silty clay.

Among them, silty clay is a common soil in coastal areas. During the actual construction of the embankment and road structure, it is necessary to clear the surface soil and excavate the foundation pit, resulting in the waste of the silty clay and additional treatment costs. In this application, the use of Its low permeability makes it a closed air soil, combined with an anti-seepage membrane layer, which can effectively prevent the infiltration of external seawater, and the silty clay has a high organic matter content, which can be used as a good greening planting soil, and does not require additional planting soil. , which not only greatly improves the ecological effect of the structure, but also reduces the production cost.

In a possible embodiment, the end of the outer seepage-proof wall close to the embankment body is higher than the end of the outer seepage-proof wall close to the road structure, and the drainage system includes: disposed at the connection between the outer seepage-proof wall and the road structure and along the road structure The drainage ditch arranged in the direction of extension.

In the above realization process, the drainage ditch can be used to collect the surface water of the outer anti-seepage wall and the road structure at the same time, and the structure is more compact. At the same time, the inclined arrangement of the outer anti-seepage wall is used to ensure that the surface water can enter smoothly through the action of gravity. Drainage ditches can reduce the time that the surface water stays on the surface of the outer seepage prevention wall and reduce water seepage.

In a possible embodiment, the end of the inner seepage-proof wall close to the road structure is higher than the end of the inner seepage-proof wall close to the riprap platform, and the surface of the inner seepage-proof wall is provided with a concrete prefabricated flap arranged along the extension direction of the road structure The edge and the hollow brick layer used for planting the vegetation layer, and the prefabricated concrete edge is set at one end of the outer anti-seepage wall close to the pavement structure.

In the above realization process, the design of the concrete prefabricated flap is used to ensure the stability of its structure, and at the same time, its durability under the scouring of the sea water on the inland side can also be improved. The protective structure of the slope section is formed to further improve its durability under the erosion of sea water on the inland side.

In a possible embodiment, the surface of the suppression platform is provided with a first protective layer, and the first body includes a slope section, a platform and a top section connected in sequence from the outer sea side to the inland sea side, wherein the slope section The platform is inclined and not higher than the platform, the platform is lower than the top section of the embankment, and a step for installing the wave break structure is formed between the side wall of the top section of the embankment and the top wall of the platform, and the pavement structure is arranged on the top section of the embankment, the slope section and The surface of the platform is provided with a second protective surface layer, and the second protective surface layer is provided with vertically arranged exhaust holes.

In the above implementation process, the setting of the second protective layer further reduces the scouring of the repression platform and the embankment body by the sea water on the outer sea side, and improves its service life.

Optionally, the wave-proof structure includes a bottom plate, a block stone retaining wall and a reinforced concrete wave-proof wall.

The bottom plate is connected with the second protective layer and closely abuts with the side wall of the top section of the embankment, and the bottom wall of the bottom plate is provided with a tooth wall for being embedded in the first body to limit the position.

The poured block stone retaining wall is vertically fixed on the upper surface of the bottom plate and closely abuts against the side wall of the top section of the embankment.

The reinforced concrete wave-proof wall is connected with the upper surface of the cast-in-block stone retaining wall and protrudes out of the pavement structure. The root of the reinforced concrete wave-proof wall is provided with a drain hole, and the end of the reinforced concrete wave-proof wall away from the cast-block stone retaining wall faces the sea. side tilt.

Through the above setting methods, the anti-wave effect is guaranteed to be good.

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

In the above realization process, the stability of the embankment structure is effectively improved through the cooperation of the soft foundation treatment and the suppression platform and the riprap platform. At the same time, through the setting of the second cushion layer, a construction work platform can be provided, which is convenient for the construction machinery during construction. On-site work.

In the second aspect, the embodiments of the present application provide a construction method for the above-mentioned embankment structure suitable for coastal areas, which includes:

After the construction of the first cushion corresponding to the suppression platform and the riprap platform, the suppression platform on the outer sea side and the riprap platform on the inland sea side will be dumped and filled.

Lay and fill the first cushion corresponding to the main structure, fill and compact the dense embankment body, outer seepage prevention wall, road structure and inner seepage prevention wall, then construct the wave prevention structure, the drainage system, the pavement structure on the top of the embankment, and the Road structure pavement.

The vegetation layer of the outer anti-seepage wall and the inner anti-seepage wall shall be constructed.

In the above realization process, the above steps are used for construction, and the seawater is cut off by the suppression platform and the riprap platform to carry out the construction of the main body. The operation is controllable and simple and convenient, and the embankment road structure suitable for coastal areas is obtained.

In a possible embodiment, the embankment road structure includes a first protective layer disposed on the pressing platform and a second protective layer disposed on the embankment body, and the construction method includes: filling and rolling before constructing the wave prevention structure After compacting the embankment body, the outer anti-seepage wall, the road structure, the inner anti-seepage wall and the riprap platform, and after the preloading and settlement are basically stable, the first and second protective layers are constructed.

After the pre-compression and settlement are basically stable, the first and second protective layers can be constructed to ensure the stability of the connection between the first protective layer and the repression platform, and the connection between the second protective layer and the embankment body. stability, thereby ensuring the stability and durability of the entire embankment structure.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following drawings will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

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

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

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

Icon: 10- embankment structure; 100- first cushion layer; 101- bagged gravel top layer; 103- high-strength woven geotextile layer; 105- first gravel cushion layer; 106- woven geotextile layer; 110-Second cushion; 120-Dike body; 121-First body; 123-Pavement structure; Structure; 1271-base plate; 1272-tooth wall; 1274-irrigated block stone retaining wall; 1275-base; 1276-flow trough; 1278-wave break wall; 1279- drain hole; Vegetation layer; 133-second body; 135-impermeable membrane layer; 137-drainage ditch; 140-inner seepage-proof wall; 141-concrete prefabricated flap; 143-hollow brick layer; 150-road structure; 151-base body; - surface layer; 155- base layer; 157- sub-base layer; 180- repression platform; 181- concrete lattice beam; 183- first surface layer; 190- riprap platform;

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

The terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

The embankment structure includes the outer sea side and the inland sea side, where the outer sea side refers to the side facing the sea, and the inland sea side refers to the side facing the land, wherein the inland sea side can be a land or a shallow bay, with a certain seawater, but the water level is limited. Not high and the wind and waves are small. Based on the above settings, the embankment structure provided in this application and suitable for coastal areas will be described in detail.

Example

Referring to FIG. 1 , the present embodiment provides an embankment structure 10 suitable for coastal areas, which includes a first cushion layer 100 , a main structure, a suppression platform 180 and a riprap platform respectively disposed on the first cushion layer 100 . 190.

The first cushion layer 100 includes a bagged crushed stone pressure top layer 101 , a high-strength woven geotextile layer 103 , and a first crushed stone cushion layer 105 that are stacked and laid in sequence from far away from the ground to close to the ground (ie, from top to bottom). And the woven geotextile layer 106, specifically, 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 crushed stone top layer 101 is 40cm, and the thickness of the first crushed stone cushion layer 105 is 60 cm, and the surface of the first crushed stone cushion layer 105 is basically flat, and the position where the first crushed stone cushion layer 105 needs to be thrown cannot be missed or less thrown.

It should be noted that when the high-strength woven geotextile layer 103 and the woven geotextile layer 106 need to be overlapped during the construction process, the overlap width needs to be greater than 50cm, and high-strength nylon yarn or polyester yarn is used for sewing processing to ensure The lapped high-strength woven geotextile layer 103 and the woven geotextile layer 106 have good integrity.

Among them, it should be noted that when the foundation of the area where the embankment structure 10 is located is better and does not require special treatment, the first cushion layer 100 can be directly set on the ground, but the area where the embankment structure 10 is located generally has poor geological conditions. Soft foundation treatment is required to ensure the stability of the embankment structure 10 . The method of soft base processing may refer to the related art, which is not limited in this application.

Therefore, taking this embodiment as an example, when the coastal area corresponding to the main structure needs to be subjected to soft foundation treatment, before the soft foundation treatment, the embankment structure 10 further includes a second cushion layer 110, and the second cushion layer 110 is located on the first cushion layer 100 corresponds to the lower side of the main structure, and the structural load mode can be effectively improved by suppressing the platform, and combined with effective soft foundation treatment measures, the stability of the embankment structure 10 can be greatly ensured.

The second cushion layer 110 is composed of a composite geotextile layer and a graded gravel layer, wherein the composite geotextile layer is laid below the graded gravel layer, and the specific thickness of the graded gravel layer can be determined according to site conditions or adjustment, which is not limited here.

The main structure includes an embankment body 120 , an outer seepage prevention wall 130 , a road structure 150 and an inner seepage prevention wall 140 connected in sequence from the outer sea side to the inner sea side of the embankment road structure 10 .

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

The first body 121 is obtained by rolling and compacting with riprap. The first body 121 includes a slope section, a platform and a top section connected in sequence from the outer sea side to the inland sea side, wherein the slope section is inclined and not high. For the platform, the platform is lower than the top section of the embankment and a step is formed between the side wall of the top section and the top wall of the platform. Among them, the slope section, the platform and the top section of the embankment are integrally formed, and the specific construction method can refer to the relevant technology, which will not be repeated here.

The slope section and the surface of the platform are provided with a second protective layer. The second protective layer includes a tiled cast-in-block stone layer 1251 and a second crushed stone cushion layer 1253 . The grooves and joints of the poured block stone layer are filled and filled with C20 fine stone concrete.

At the same time, the second protective layer is provided with an exhaust hole 126, and the exhaust hole 126 is arranged vertically, and then the exhaust hole exhausts the gas under the second protective layer, and maintains the air pressure balance inside and outside the second protective layer.

The second protective layer is provided with concrete lattice beams 181 arranged along the extension direction of the embankment structure. Specifically, the concrete lattice beams 181 are arranged on the slope section of the first body. Specifically, the concrete lattice beams 181 include two groups, one A group of concrete lattice beams 181 is located at the end of the connection between the slope section and the platform, and the other group of concrete lattice beams 181 is located at the connection end of the first protective layer and the second protective layer. Under the above setting conditions, the second protective layer can be effectively improved. Stability when washed by sea water on the open sea side. Among them, the concrete lattice beam 181 is cast-in-place with C25 concrete.

The pavement structure 123 is arranged at the top of the slope, and the pavement structure 123 can be used as a passageway for inspection and maintenance vehicles during the operation period, which is convenient for inspection and maintenance. Since the application of the above-mentioned pavement structure 123 does not involve large-scale transportation, in order to save cost and facilitate construction, the pavement structure 123 is a cement concrete pavement structure 123 .

The anti-wave structure 127 is disposed on the steps and extends out of the steps, that is, the road surface structure 123 is lower than the anti-wave structure 127, that is, the anti-wave structure 127 and the road surface structure 123 are connected sequentially from the outer sea side to the inland sea side.

Specifically, please refer to FIG. 2 and FIG. 3 , the wave-proof structure 127 includes a bottom plate 1271 , a block stone retaining wall 1274 and a reinforced concrete wave-proof wall.

The bottom plate 1271 is respectively connected with the second protective layer and the side walls of the slope top section, and the bottom wall of the bottom plate 1271 is provided with a toothed wall 1272 embedded in the first body to limit the position, through the toothed wall 1272 and the slope top section The cooperation of the side walls of the bottom plate 1271 is laterally limited to ensure the stability of the anti-wave structure 127 when it is washed by the sea water on the offshore side. The bottom plate 1271 is a concrete bottom plate 1271 . In this embodiment, the bottom plate 1271 is poured with C20 concrete with a thickness of 50 cm, which effectively improves the strength of the bottom plate 1271 .

The poured block stone retaining wall 1274 is vertically fixed on the upper surface of the bottom plate 1271 and closely abuts with the side wall of the slope top section. The side of the poured block stone retaining wall 1274 away from the slope top section is a slope surface. Through the setting of the slope, the strength of the buffer brush is reduced, and at the same time, it is convenient to discharge the seawater after heavy brushing.

Among them, the block stone retaining wall 1274 is made of C20 fine stone concrete for example, and the block stone should be made of fresh and complete stone, no cracks, no mud, no weathering and cracking, and seawater corrosion resistance. A rubble with good performance and a shape with two roughly parallel planes. The combination of C20 fine stone concrete and block stone ensures the strength of the block stone retaining wall 1274 and prolongs its service life. The reinforced concrete wave break wall includes a base 1275 and a wave break wall 1278 arranged on the top wall of the base 1275. The base 1275 is connected to the upper surface of the block stone retaining wall 1274. The wave break wall 1278 extends out of the top section of the embankment (that is, the break The wave wall 1278 is higher than the pavement structure 123).

Wherein, the end of the reinforced concrete wave break wall far from the stone retaining wall 1274 is inclined to the sea side. Specifically, the side of the wave break wall 1278 close to the sea side is an arc surface, and the end of the arc face away from the base 1275 faces the sea. Side extension, good anti-wave effect.

The base 1275 is provided with a water flow groove 1276. The flow groove 1276 is arranged on the base 1275 and is located at one end of the breakwater wall 1278 close to the road surface structure 123. The flow groove 1276 is arranged along the extension direction of the embankment road structure 10, and further, even if some ocean waves cross over under extreme conditions The wave break wall 1278 also flows into the water flow groove 1276 for collection, and the water flow groove 1276 can collect the accumulated water in the pavement structure and discharge it.

In order to facilitate the discharge of the water in the water flow groove 1276, prevent water accumulation and avoid other treatments, a drain hole 1279 is provided at the root of the reinforced concrete wave break wall. The base 1275 and/or the wave break wall 1278 is extended, and the end of the drain hole 1279 close to the water channel 1276 is higher than the end of the drain hole 1279 away from the water channel 1276, that is, the drain hole 1279 is inclined, for example, inclined outward. Slope 6%.

It should be noted that the exhaust holes 126 are PVC hard pipes and are arranged in a plum blossom shape with a spacing of 3m, and the drain holes 1279 are arranged horizontally with a spacing of 5m.

At the same time, optionally, the upper surface of the pavement structure 123 is flush with the upper surface of the base 1275 or slightly higher (not more than 10 cm) above the upper surface of the base 1275, thereby ensuring that the surface water of the pavement structure 123 is drained through the drain hole 1279 to Open sea, prevent water accumulation and prevent water seepage.

The reinforced concrete wave break wall can be cast-in-place with C35 marine durable concrete, which is not limited here.

The outer seepage-proof wall 130 and the inner seepage-proof wall 140 are both provided with a vegetation layer 131 . That is, the vegetation layers 131 are provided on both sides of the road structure 150 to improve its ecological effect, and at the same time, the setting of the vegetation layers 131 also has a certain noise reduction effect.

Specifically, the outer anti-seepage wall 130 and the inner anti-seepage wall 140 both include a second body 133 and an anti-seepage membrane layer 135 . The side walls and the bottom wall are closely connected with the embankment body 120 , the corresponding road structure 150 and the corresponding rock dump platform 190 . The anti-seepage membrane layer 135 is specifically, for example, an anti-seepage geotextile layer, and the cooperation between the air-sealing soil and the anti-seepage membrane layer 135 is used to make the internal seepage water blocked by the outer anti-seepage wall 130 and the inner anti-seepage wall 140 respectively to prevent infiltration into the road structure. 150, to ensure the stability of the road structure 150 and prevent the collapse caused by water seepage.

Among them, the applicant found that silty clay is a common soil quality in coastal areas. During the actual construction of the embankment and road structure 10, it is necessary to remove the topsoil or excavation of the foundation pit, resulting in the waste of the silty clay and additional treatment costs. In this application, the air-enclosed soil includes silty clay, which is used as an air-enclosed soil by virtue of its low permeability. Combined with the anti-seepage membrane layer 135, it can effectively block internal water seepage, and the silty clay has a high organic matter content and can be used as a Good greening planting soil does not require additional planting soil, which not only greatly improves the ecological effect of the structure, but also reduces the cost.

Further optionally, the end of the outer seepage-proof wall 130 close to the embankment body 120 is higher than the end of the outer seepage-proof wall 130 close to the road structure 150, and the road structure has a drainage system; the drainage system includes: provided on the outer seepage-proof wall 130 and the road structure. The drainage ditch 137 is arranged at the connection of the road structure 150 and along the extension direction of the road structure 150 , and the bottom wall of the drainage ditch 137 is lower than the upper surface of the road structure 150 . That is, the drainage ditch 137 can be used to collect the surface water of the outer anti-seepage wall 130 and the road structure 150 at the same time, and the structure is more compact. At the same time, the inclined arrangement of the outer anti-seepage wall 130 is used to ensure that the surface water can smoothly pass the action of gravity. into the drainage ditch 137 to reduce the time that the surface water stays on the surface of the outer anti-seepage wall 130 and reduce water seepage.

In order to further ensure safety and aesthetic appearance, the drainage ditch 137 is provided in the form of a side ditch of a cover plate.

One end of the inner anti-seepage wall 140 close to the road structure 150 is higher than the end of the inner anti-seepage wall 140 close to the riprap platform 190 . For the hollow brick layer 143 for planting the vegetation layer 131 , the concrete prefabricated flap 141 is arranged on one end of the outer seepage prevention wall 130 close to the road surface structure 123 . That is, the surface of the inner anti-seepage wall 140 is effectively covered by the prefabricated concrete flap 141 and the hollow brick layer 143 . The design of the prefabricated concrete flap 141 is used to ensure the stability of its structure, and at the same time, it can also improve its durability under the scouring of the sea water on the inland side. The scour structure further improves its durability under the scour of rain or sea water on the inland sea side. Among them, the concrete prefabricated flap 141 can be cast-in-place with C25 concrete. Wherein, the hollow brick layer 143 is obtained by splicing a plurality of hollow bricks, and the hollow bricks are, for example, hexagonal hollow bricks, and the effect of preventing waves is better.

Based on the above, due to the difference between the inner anti-seepage wall 140 and the outer anti-seepage wall 130, the vegetation layers 131 disposed on the inner anti-seepage wall 140 and the outer anti-seepage wall 130 are also different to a certain extent. The vegetation layer 131 is grass and shrubs planted in hexagonal hollow bricks, and the vegetation layer 131 of the outer anti-seepage wall 130 can be mixed with trees and grasses and shrubs.

The road structure is filled with earth-rock mixture to form the base body 151 of the road structure, and the base body 151 is connected with the outer anti-seepage wall 130 and the inner anti-seepage wall 140. The upper surface of the base body 151 sequentially includes the superimposed surface layer 153 and the base layer from top to bottom. 155 and sublayer 157. Wherein, both sides of the road structure 150 may be provided with anti-collision guardrails and the like according to actual needs.

The suppression platform 180 is connected to the side of the embankment body 120 away from the outer seepage prevention wall 130 . Specifically, the suppression platform 180 is connected to the slope section, and the suppression platform 180 is lower than the plane section. The height of the suppression platform 180 is lower than the wave break structure 127 and higher than the average high tide level on the open sea side of the embankment structure 10 . Among them, the average high tide level on the open sea side refers to the average height of the high tide water level on the open sea side.

The pressing platform 180 is filled with riprap and compacted by rolling, wherein, in order to ensure a good effect of preventing erosion, the outer surface of the pressing platform 180 is provided with a first protective layer 183 .

Wherein, the first protective layer 183 is composed of a plurality of large stone blocks.

Among them, the thickness of the large stone throw is, for example, 80cm, and the single weight of the stone throw is not less than 200kg. That is, the suppression platform 180 is protected by large stone throwing, which can prevent the impact and erosion of wind waves and currents. At the same time, the suppression platform 180 can also be used as a construction access road and a cofferdam.

The riprap platform 190 is connected to the end of the inner anti-seepage wall 140 away from the road structure 150, wherein the riprap platform 190 is not higher than the side of the inner anti-seepage wall 140 away from the road structure 150, so that the water on the road can directly pass through the inner anti-seepage The wall 140 and the riprap platform 190 flow to the inland sea side.

The riprap platform 190 is filled with rubble, and the surface of the riprap platform 190 is provided with a foot guard 191. Specifically, the foot guard 191 is located at the connection between the riprap platform 190 and the inner concrete, and then the foot guard 191 is used to further ensure The stability of the hollow brick layer 143 and the riprap platform 190 .

It should be noted that when the soft foundation treatment is required, the first cushion layer 100 is filled in two steps.

The present application also provides a method of construction of the embankment structure 10 suitable for use in coastal areas, including:

S1. After constructing the first cushion layer 100 corresponding to the suppression platform 180 and the first cushion layer 100 corresponding to the riprap platform 190, dump and fill the suppression platform 180 and the riprap platform 190 on the sea side. The suppression platform 180 and the riprap platform 190 are used for the first construction to cut off the seawater on the inland sea side and the seawater on the outer sea side, which facilitates the subsequent construction of the main structure and ensures the stability of the subsequent main construction.

S2. Lay and fill the second cushion layer 110 corresponding to the main structure: firstly lay a layer of composite geotextile, and then fill the graded gravel layer. The specific thickness of the graded gravel layer can be determined or adjusted according to the site conditions.

S3. Select reasonable soft foundation treatment measures according to the project overview, geological conditions, structural characteristics, etc., perform soft foundation treatment on the position of the corresponding main structure, and then lay and fill the second cushion layer 110 corresponding to the main structure after the soft foundation treatment. A cushion layer 100, wherein the specific laying steps of the first cushion layer 100 are: first laying a layer of woven geotextile 106, then filling the first gravel cushion layer 105, and then laying a layer of high-strength woven geotextile 103, specifically When laying woven geotextiles and high-strength woven geotextiles, the lap width should be greater than 50cm, and high-strength nylon or polyester filaments should be used for stitching treatment, and then the bagged gravel layer of 40cm was thrown and filled to complete the first step. The setting of the cushion layer 100 .

S4. Fill and roll the compact embankment body 120, the outer seepage prevention wall 130, the road structure 150 and the inner seepage prevention wall 140. After the preloading and settlement are basically stable, construct the first protective layer 183 and the second protective layer , wherein the first protective layer 183 is connected with the second protective layer, that is, the part of the slope section directly connected to the pressing platform is not provided with the second protective layer.

S5. Construction of the anti-wave structure 127 , construction of the drainage system, paving of the road surface structure 123 on the top of the embankment and the road surface of the road structure 150 .

S6. Construct the vegetation layer 131 of the outer seepage-proof wall 130 and the inner seepage-proof wall 140 .

To sum up, the construction method of the embankment road structure suitable for coastal areas provided by this application is controllable and simple in operation, and the obtained embankment road structure suitable for coastal areas can effectively improve the structural load mode and ensure the main structure through structural changes. Stability, effectively prevent the impact and erosion of wind, waves and currents on the embankment, road structure, etc., and improve its service life and the ecological effect of the embankment structure.

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (10)

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;

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

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.

Images