Assembled ecological breakwater structure suitable for deep soft soil foundation and construction method thereof

Abstract

The present invention discloses an assembled ecological breakwater structure suitable for deep soft soil foundation and a construction method thereof. The breakwater structure includes: a breakwater foundation, a levee structure, a wave-breaking wall, and a bottom protection structure. The breakwater foundation of the present invention adopts cement mixing piles arranged in a comb-type + grid-like manner, which saves the project cost. The levee structure adopts a caisson, and an assembled connection is adopted between the caisson and the wave-breaking wall structure, which improves the offshore construction efficiency, reduces the offshore construction difficulty, and improves the construction quality. The caisson wave-facing side compartments are opened with holes and energy dissipation blocks and wave-breaking walls are placed, which can effectively achieve wave dissipation and wave-proof functions. Inert waste is backfilled inside the caisson, and artificial fish reefs are embedded in the caisson compartments on the back-wave side, which increases the ecological and environmental protection of the breakwater. The bottom protection structure adopts a grid stone cage, which reduces the amount of stone used, avoids the need for large stones, saves project investment, and is easy to transport and place, reduces the construction difficulty, and has good ecological properties.

Description

Technical Field

[0001] The present invention relates to the technical field of seaport breakwaters, and more specifically, to an assembled ecological breakwater structure suitable for use on a deep soft soil foundation and a construction method thereof. Background Art

[0002] The construction of vertical breakwater structure on traditional soft soil foundation generally involves excavation and replacement of foundation trench, dumping of block stone foundation bed, installation of embankment structure and casting of wave-breaking wall. This construction method of breakwater structure has the following disadvantages: First, the amount of foundation trench excavation is large, which has a great impact on the ecological environment of the surrounding waters and will also affect the safety of adjacent buildings; second, the amount of foundation trench excavation and replacement filling material is large, and the excavated soft soil needs to be dumped into the mud receiving area. The replacement filling material is composed of sand or block stone, which not only has a high project cost, but also has a high supply intensity due to the large demand for sand and gravel; the backfill materials in the caisson are all made of sand and gravel, which are expensive and not environmentally friendly; third, the breakwater wave-breaking wall adopts a cast-in-place structure , the amount of offshore operations is large, and it is greatly affected by wind and wave conditions, the construction efficiency is low, the wave-facing surface and wave-breaking wall of the caisson adopt regular structures, and the wave-breaking and wave-breaking effects are relatively poor, which makes the breakwater larger and the investment increased; Fourth, the breakwater is a simple reinforced concrete structure without any ecological measures, and it does not have the function of fish habitat and reproduction; Fifth, the bottom protection structure on the wave-facing side and the wave-removing side of the caisson adopts large stones or artificial blocks, which consumes a large amount of stone, has a high cost, and a large single weight. It is difficult to transport and place the construction, and the quality is difficult to guarantee. Summary of the invention

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0004] In order to achieve these purposes and other advantages according to the present invention, there is provided an assembled ecological breakwater structure suitable for use on a deep soft soil foundation, comprising: a breakwater foundation, a levee structure arranged on the breakwater foundation, a wave-breaking wall structure arranged on the top of the levee structure, and a bottom protection structure arranged before and after the levee structure;

[0005] The breakwater foundation includes: cement mixing piles arranged in a deep soft soil foundation, and a block stone bed arranged above the cement mixing piles. The cement mixing piles are arranged in a comb-like manner and a grid-like manner. The cement mixing piles located below the rear toe of the caisson are arranged in a grid-like manner, and the cement mixing piles at other positions are arranged in a comb-like manner with comb teeth arranged along the front and rear direction of the caisson.

[0006] The embankment structure comprises: a caisson arranged on a block stone bed, a first hole is opened on the wall of the caisson on the wave-facing side, the first hole is connected to the compartment on the wave-facing side of the caisson, an energy dissipation block is placed in the compartment on the wave-facing side of the caisson, a second hole is opened on the upper part of the wall of the caisson on the back-wave side, the second hole is connected to the compartment on the back-wave side of the caisson, an artificial reef is embedded in the compartment on the back-wave side of the caisson, and other compartments of the caisson are filled with inert waste;

[0007] The wave-breaking wall structure comprises: a top plate arranged on the top of the caisson, an energy dissipation sill arranged on the top plate, and a wave-breaking wall arranged on the top plate, wherein the top plate, the energy dissipation sill and the wave-breaking wall are integrally formed;

[0008] The bottom protection structure includes: grid stone cages respectively arranged in front and rear of the caisson, the front of the caisson refers to the direction of the caisson close to the wave-facing side, and the rear of the caisson refers to the direction of the caisson close to the wave-back side.

[0009] Preferably, a plurality of embedded steel sections are provided on the top of the caisson, and the top plate is assembledly connected to the embedded steel sections.

[0010] Preferably, the wave-breaking wall is a reverse arc reinforced concrete wave-breaking wall.

[0011] Preferably, the wave-breaking wall is arranged on the top plate near the back-wave side, and a plurality of energy dissipation sills are arranged and are located on the top plate near the front-wave side.

[0012] The present invention also provides a construction method for an ecological breakwater structure on a deep soft soil foundation, comprising:

[0013] Step 1, construction of breakwater foundation: cement mixing piles are set up in the seawall foundation construction area, the cement mixing piles are arranged in a comb-like manner and in a grid-like manner, the breakwater body is constructed with caissons, the cement mixing piles located below the rear toe of the caisson in the breakwater foundation in the caisson placement area are arranged in a grid-like manner, and the cement mixing piles at other positions in the breakwater foundation are arranged in a comb-like manner with comb teeth arranged along the front and rear direction of the caisson, and a block stone bed is dumped above the cement mixing piles;

[0014] Step 2, embankment structure construction: prefabricate caissons in an onshore caisson prefabrication plant, a first hole is opened on the wall of the caisson on the wave-facing side, the first hole is connected to the compartment on the wave-facing side of the caisson, a second hole is opened on the upper part of the wall of the caisson on the back-wave side, the second hole is connected to the compartment on the back-wave side of the caisson, the caisson is transported to the construction site by a semi-submersible barge, and placed on the breakwater foundation, energy dissipation blocks are placed in the compartment on the wave-facing side of the caisson by water hoisting, artificial reefs are embedded in some compartments on the back-wave side of the caisson by water hoisting, and inert waste is filled in other compartments of the caisson;

[0015] Step 3: Construction of wave-breaking wall structure: prefabricate a top plate on land, the upper surface of which is integrally provided with an energy dissipation sill and a wave-breaking wall, install the top plate on the top of the caisson by water hoisting, the top of the caisson is provided with a number of embedded steel sections, the top plate is assembledly connected to the embedded steel sections, and concrete is poured at the connection node between the top plate and the caisson;

[0016] Step 4: Construction of bottom protection structure: The gridded gabion is filled with stones on land, transported to the construction site by flat barge, and placed in front of and behind the caisson by water hoisting. The front of the caisson refers to the direction of the caisson close to the wave-facing side, and the rear of the caisson refers to the direction of the caisson close to the wave-shielding side.

[0017] The present invention has at least the following beneficial effects: by adopting a cement mixing pile foundation combining a comb-type arrangement with a grid-like arrangement to replace the foundation trench excavation and replacement filling commonly used in the construction of vertical breakwaters on conventional deep soft soil foundations, it is possible to avoid the pollution of the water environment caused by a large amount of soft soil excavation and the impact on the safety of surrounding buildings, and also greatly reduce the demand for sand, block stones, etc. in the construction of breakwaters. The intensive arrangement form combining a comb-type arrangement with a grid-like arrangement saves the amount of cement mixing piles and reduces the project cost. At the same time, the top plate and caisson where the wave-breaking wall structure is located adopt an assembled structure, which greatly reduces the amount of offshore operations, improves construction efficiency and quality, and Holes are opened in the compartments on the wave-facing side of the caisson and energy dissipation blocks are placed. The wave-breaking wall adopts a large-scale anti-arc structure and is arranged behind the embankment. At the same time, an energy dissipation threshold is set in front of the wave-breaking wall, which has significantly better wave dissipation and wave protection effects, improves the stress characteristics of the breakwater structure, and reduces the elevation of the breakwater crest, thereby saving investment; the grid stone cage bottom protection structure greatly reduces the amount of stone used, saves engineering investment, avoids the need for large stones, is easy to transport and place, and reduces the difficulty of construction. At the same time, it can better prevent the incident waves and the superposition of waves reflected by the vertical surface of the breakwater from scouring the soft soil foundation in front and behind the breakwater, ensuring the safety of the breakwater structure. Artificial fish reefs are embedded in some of the compartments on the back-wave side of the caisson, which can better prevent the artificial fish reefs from being impacted by waves, provide fish with a safe and quiet habitat surrounded on three sides, and enable the breakwater to have the function of repairing and protecting fishery resources; inert waste is used instead of sand and gravel backfill in the caisson, which makes full use of construction waste and reduces the amount of sand and gravel. Therefore, the breakwater structure provided by the present invention is of great significance to the construction of new breakwaters.

[0018] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the cross-sectional structure of the assembled ecological breakwater structure according to an embodiment of the present invention;

[0020] Figure 2 It is a plan view of cement mixing piles in the breakwater foundation according to an embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of the plan structure of the caisson structure according to an embodiment of the present invention;

[0022] In the figure: 11 is a cement mixing pile, 12 is a block stone bed;

[0023] 21 is a caisson, 22 is an inert waste, 23 is a first hole, 24 is an energy dissipation block, 25 is an artificial reef, 26 is a pre-buried steel, and 27 is a second hole;

[0024] 31 is a top plate, 32 is a wave-breaking wall, and 33 is an energy dissipation sill;

[0025] 4 is the bottom protection structure. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0027] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] Due to the vertical breakwater structure on the traditional deep soft soil foundation, the foundation trench excavation volume is large, which has a great impact on the ecological environment of the surrounding waters and will also affect the safety of nearby buildings; the amount of backfill materials such as sand and boulders is large, which not only increases the project cost, but also causes supply difficulties due to the large demand for sand and gravel, and the construction intensity is high; the wave-breaking wall adopts a cast-in-place reinforced concrete structure, the offshore operation volume is large, it is greatly affected by wind and wave conditions, the construction efficiency is low, and the caisson wave-facing surface and wave-breaking wall are mostly regular structures, with poor wave-breaking effect; the breakwater body is completely composed of reinforced concrete structure, and the compartment is backfilled with sand and gravel. There are no ecological measures, it does not have the function of fish habitat and reproduction, and does not meet the requirements of ecological breakwaters.

[0029] In order to solve the above problems, Figures 1 to 3As shown, the present invention provides an assembled ecological breakwater structure suitable for deep soft soil foundation, comprising: a breakwater foundation, a levee structure arranged on the breakwater foundation, a wave-breaking wall structure arranged on the top of the levee structure, and a bottom protection structure arranged before and after the levee structure;

[0030] The breakwater foundation includes: cement mixing piles 11 arranged in a deep soft soil foundation, and a block stone bed 12 arranged above the cement mixing piles 11. The cement mixing piles 11 are arranged in a comb-like manner and a grid-like manner. The cement mixing piles 11 located below the rear toe of the caisson 21 are arranged in a grid-like manner, and the cement mixing piles 11 at other positions are arranged in a comb-like manner with comb teeth arranged along the front and rear direction of the caisson 21.

[0031] The embankment structure includes: a caisson 21 arranged on a block stone bed 12, a first hole 23 is opened on the wall of the caisson 21 on the wave-facing side, the first hole 23 is connected to the compartment of the caisson 21 on the wave-facing side, an energy dissipation block 24 is placed in the compartment of the caisson 21 on the wave-facing side, a second hole 27 is opened on the upper part of the wall of the caisson 21 on the wave-repelling side, the second hole 27 is connected to the compartment of the caisson 21 on the wave-repelling side, artificial reefs 25 are embedded in some compartments on the wave-repelling side of the caisson 21, and other compartments of the caisson 21 are filled with inert waste 22;

[0032] The wave-breaking wall structure comprises: a top plate 31 arranged on the top of the caisson 21, an energy dissipation sill 33 arranged on the top plate, and a wave-breaking wall 32 arranged on the top plate, wherein the top plate 31, the energy dissipation sill 33 and the wave-breaking wall 32 are integrally formed;

[0033] The bottom protection structure includes: grid gabions respectively arranged in front and behind the caisson 21, the front of the caisson 21 refers to the direction of the caisson 21 close to the wave-facing side, and the rear of the caisson 21 refers to the direction of the caisson 21 close to the wave-back side. The grid gabions are made of plastic geogrids and are filled with small stones.

[0034] In the above embodiment, since the foundation under the rear toe of the embankment caisson 21 is subjected to the greatest force, a grid arrangement is adopted, and a comb arrangement is adopted at other locations (such as Figure 2As shown). In the above embodiment, by using cement mixing piles 11 as foundation to replace the excavation and replacement of the foundation trench commonly used in the original breakwater construction, the pollution of the water environment caused by the excavation of soft soil and the impact on the safety of surrounding buildings are avoided, and the amount of sand and stone used is greatly reduced. At the same time, in the comb-shaped arrangement area of ​​the cement mixing piles 11, the construction process can be carried out forward and backward along the direction of the comb teeth, without turning the bow 90 degrees, which greatly improves the construction efficiency. Only the grid-shaped arrangement is used at the maximum stress position of the rear toe of the caisson 21, which not only meets the force requirements of the foundation of the embankment structure, but also makes the arrangement of the cement mixing piles 11 more intensive, greatly saving the project investment.

[0035] By adopting a cement mixing pile 11 foundation combining a comb-type arrangement and a grid-like arrangement to replace the foundation trench excavation and replacement commonly used in the construction of upright breakwaters on conventional deep soft soil foundations, it is possible to avoid the pollution of the water environment caused by a large amount of soft soil excavation and the impact on the safety of surrounding buildings, and also greatly reduce the demand for sand, boulders, etc. in the construction of breakwaters. The cement mixing piles adopt an intensive arrangement of comb-type + grid-type, which saves the amount of cement mixing piles and reduces the project cost. At the same time, the top plate 31 where the wave-breaking wall 32 is located and the caisson 21 adopt an assembled structure, which greatly reduces the amount of offshore operations and improves construction efficiency. A first hole 23 is provided in the wall of the wave-facing side of the caisson 21, and an energy dissipation block 24 is placed in the compartment of the wave-facing side of the caisson 21. The waves from the sea surface rushing toward the wave-facing side of the caisson 21 can be discharged through the first hole 23, which can greatly reduce the impact of the waves on the wall of the wave-facing side of the caisson 21. The waves entering the compartment of the wave-facing side of the caisson 21 gradually consume energy under the action of the energy dissipation block 24, further reducing the impact on the caisson 21. The wave-breaking wall 32 adopts a large-scale reverse arc structure and is arranged on the rear side of the embankment. At the same time, an energy dissipation threshold 33 is set in front of the wave-breaking wall 32, both of which have significantly better wave dissipation and wave prevention effects, improve the stress characteristics of the breakwater structure, and reduce the elevation of the breakwater top, thereby saving investment; the grid stone cage bottom protection structure greatly reduces the amount of stone used, avoids the need for large stones, is easy to transport and place, and reduces the difficulty of construction. At the same time, it can prevent the scouring effect of incident waves and waves reflected from the vertical surface of the breakwater on the soft soil foundation in front and behind the breakwater, thereby ensuring the safety of the breakwater structure. A second hole 27 is provided on the wall of the back-wave side of the caisson 21, and the second hole 27 can allow fish to enter and exit the compartment, and an artificial fish reef 25 is embedded in part of the compartment on the back-wave side of the caisson 21, which can better prevent the artificial fish reef 25 from being impacted by waves, and provide a safe and quiet habitat surrounded on three sides for fish, so that the breakwater has the function of repairing and protecting fishery resources; inert waste 22 is used in the caisson 21 instead of sand and gravel backfill, which makes full use of construction waste and reduces the amount of sand and gravel. Therefore, the breakwater structure provided by the present invention is of great significance to the construction of new breakwaters.

[0036] In a specific embodiment of the above technical solution, a plurality of embedded steel sections 26 are arranged on the top of the caisson 21, and the top plate is assembled and connected to the embedded steel sections 26. Since the top plate 31 where the wave-breaking wall structure is located and the caisson 21 adopt an assembled structure, the time of offshore operations is greatly reduced, and the construction efficiency and quality are improved.

[0037] In a specific embodiment of the above technical solution, the wave-breaking wall 32 is a reverse arc reinforced concrete wave-breaking wall 32.

[0038] More preferably, the wave-breaking wall 32 is arranged on the top plate near the inner sea side, and a plurality of energy dissipation thresholds 33 are also arranged on the top plate near the wave-facing side.

[0039] Since the wave-breaking wall 32 adopts a large-scale reverse arc structure, the wave-breaking and wave-proofing effects of the wave-breaking wall 32 are greatly improved. The reverse arc structure changes the wave motion trajectory, and an energy dissipation threshold 33 is set in front of the wave-breaking wall 32. The energy dissipation threshold 33 breaks the waves, which reduces the instantaneous impact of the waves to a certain extent, prevents the waves from crossing the top of the embankment and entering the port area, improves the force performance of the breakwater, and can reduce the elevation of the breakwater top, thereby reducing the project cost. The specific dimensions of the reverse arc structure of the wave-breaking wall 32 and the energy dissipation threshold 33 need to be determined through the results of physical model tests.

[0040] In a specific embodiment of the above technical solution, the bottom protection structure adopts a grid stone cage, which is formed by using a plastic geogrid and is filled with small stones and then sealed.

[0041] The present invention also provides a construction method for an assembled ecological breakwater structure suitable for use on a deep soft soil foundation, comprising:

[0042] Step 1, construction of breakwater foundation: cement mixing piles 11 are set up in the seawall foundation construction area, and the cement mixing piles 11 are arranged in a comb-like manner and a grid-like manner. The breakwater body is constructed with a caisson 21. The cement mixing piles 11 located below the rear toe of the caisson 21 in the caisson 21 placement area of ​​the breakwater foundation are arranged in a grid-like manner, and the cement mixing piles 11 at other positions in the breakwater foundation are arranged in a comb-like manner with comb teeth arranged along the front and rear direction of the caisson 21, and a block stone bed 12 is dumped above the cement mixing piles 11;

[0043] The cement mixing ratio and other parameters of the cement mixing pile 11 need to be determined through test piles, and the strength must meet the design requirements; only after the cement mixing pile construction is completed and reaches the design strength, the breakwater block stone foundation and the upper embankment structure can be dumped. The cement mixing pile 11 avoids the pollution of the water environment caused by the excavation of the deep soft soil foundation and ensures the safety of the surrounding buildings. The cement mixing pile 11 adopts a combination of comb-type layout and partial grid-like layout (refer to Figure 2), which can effectively enhance the vertical bearing capacity and shear resistance of the treated foundation, ensure the stability of the breakwater structure, greatly reduce the settlement of the breakwater structure, and at the same time make the mixing pile layout intensive, saving the amount of cement mixing piles and saving investment;

[0044] Step 2, embankment structure construction: prefabricate the caisson 21 in the onshore caisson 21 prefabrication plant, a first hole 23 is opened on the wall of the caisson 21 on the wave-facing side, the first hole 23 is connected to the compartment of the caisson 21 on the wave-facing side, a second hole 27 is opened on the upper part of the wall of the caisson 21 on the wave-receiving side, the second hole 27 is connected to the compartment of the caisson 21 on the wave-receiving side, the caisson 21 is transported to the construction site by a semi-submersible barge, and is placed on the breakwater foundation, an energy dissipation block 24 is placed in the compartment of the wave-facing side of the caisson 21 by water hoisting, an artificial reef 25 is embedded in some compartments of the caisson 21 on the wave-receiving side by water hoisting, and inert waste 22 is filled in other compartments of the caisson 21;

[0045] Since the first hole 23 is opened on the box wall of the caisson 21 on the wave side, when the wave collides with the box wall on the wave side of the caisson 21, part of the wave energy flows into the compartment on the wave side of the caisson 21 along the first hole 23, and the impact of the wave on the box wall on the wave side of the caisson 21 is effectively reduced. The waves flowing into the compartment on the wave side of the caisson 21 can be further reduced by the obstruction of the energy dissipation block 24, thereby improving the wave dissipation effect.

[0046] Since the wall portion of the caisson 21 on the wave-repelling side is provided with a second hole 27, the second hole 27 can allow fish to enter and exit the compartment, and the artificial fish reef is embedded in the compartment of the caisson 21, providing a good placement space for the artificial fish reef 25, solving the stability problem of the artificial fish reef 25 under the action of waves, and the artificial fish reef 25 also provides a good habitat and breeding ground for fish surrounded on three sides.

[0047] Step 3: Construction of wave-breaking wall structure: prefabricate a top plate 31 on land, the upper surface of which is integrally provided with an energy dissipation sill 33 and a wave-breaking wall 32, and install the top plate 31 as a whole on the top of the caisson 21 by means of water hoisting. The top of the caisson 21 is provided with a plurality of embedded steel sections 26, the top plate 31 is assembledly connected to the embedded steel sections 26, and concrete is poured at the connection node between the top plate 31 and the caisson 21;

[0048] The wave-breaking wall 32 and the top plate 31 on which it is located, as well as the caisson 21, adopt an assembled structure, which greatly reduces the time of offshore operations and improves construction efficiency.

[0049] Preferably, the wave-breaking wall 32 is a reverse arc reinforced concrete wave-breaking wall 32 .

[0050] More preferably, the wave-breaking wall 32 is arranged on the top plate near the back-wave side, and a plurality of energy dissipation thresholds 33 are also arranged on the top plate near the front-wave side.

[0051] The wave-breaking wall 32 adopts a large-scale reverse arc structure, is arranged behind the embankment structure, and an energy dissipation threshold 33 is arranged in front of the wave-breaking wall 32. The specific sizes of the reverse arc structure and the energy dissipation threshold 33 need to be determined through the results of physical model tests. The wave-breaking and wave-dissipating structure formed by the wave-breaking wall 32 and the energy dissipation threshold 33 can better dissipate waves, change the movement trajectory of waves, reduce the instantaneous impact force of waves, effectively improve the force on the breakwater, and significantly improve the wave-breaking effect.

[0052] Step 4: Construction of bottom protection structure: The grid gabion is formed by plastic geogrid, which is filled with small stones and then sealed. The grid gabion is filled with stones on land, transported to the construction site by flat barge, and placed in front of and behind the caisson 21 by water hoisting. The front of the caisson refers to the direction of the caisson close to the wave side, and the rear of the caisson 21 refers to the direction of the caisson 21 close to the wave side.

[0053] The gridded gabion greatly reduces the amount of stone used, avoids the need for large stones, saves project investment, and is easy to transport and place, reducing the difficulty of construction. It can better prevent the scouring effect of incident waves and waves reflected from the vertical surface of the breakwater on the soft soil foundation in front and behind the breakwater, ensuring the safety of the breakwater structure.

[0054] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An assembled ecological breakwater structure suitable for deep soft soil foundation, characterized in that: include: A breakwater foundation, a levee structure arranged on the breakwater foundation, a wave-breaking wall structure arranged on the top of the levee structure, and a bottom protection structure arranged before and after the levee structure; The breakwater foundation includes: cement mixing piles set in a deep soft soil foundation, and a block stone bed set above the cement mixing piles. The cement mixing piles are arranged in a comb-like manner and a grid-like manner. The cement mixing piles located below the rear toe of the caisson are arranged in a grid-like manner, and the cement mixing piles at other positions are arranged in a comb-like manner with comb teeth arranged along the front and rear direction of the caisson. The embankment structure comprises: a caisson arranged on a block stone bed, a first hole is opened on the wall of the caisson on the wave-facing side, the first hole is connected to the compartment on the wave-facing side of the caisson, an energy dissipation block is placed in the compartment on the wave-facing side of the caisson, a second hole is opened on the upper part of the wall of the caisson on the back-wave side, the second hole is connected to the compartment on the back-wave side of the caisson, an artificial reef is embedded in the compartment on the back-wave side of the caisson, and other compartments of the caisson are filled with inert waste; The wave-breaking wall structure comprises: a top plate arranged on the top of the caisson, an energy dissipation sill arranged on the top plate, and a wave-breaking wall arranged on the top plate, wherein the top plate, the energy dissipation sill and the wave-breaking wall are integrally formed; The bottom protection structure includes: grid stone cages respectively arranged in front and rear of the caisson, the front of the caisson refers to the direction of the caisson close to the wave-facing side, and the rear of the caisson refers to the direction of the caisson close to the wave-back side.

2. The assembled ecological breakwater structure according to claim 1, characterized in that: A plurality of embedded steel sections are arranged on the top of the caisson, and the top plate is assembledly connected to the embedded steel sections.

3. The assembled ecological breakwater structure according to claim 1, characterized in that: The wave-breaking wall is a reverse arc reinforced concrete wave-breaking wall.

4. The assembled ecological breakwater structure according to claim 3, characterized in that: The wave-breaking wall is arranged on the top plate near the back-wave side, and a plurality of energy dissipation sills are arranged and are located on the top plate near the front-wave side.

5. The construction method of the assembled ecological breakwater structure suitable for deep soft soil foundation according to claim 1, characterized in that: include: Step 1, construction of breakwater foundation: cement mixing piles are set up in the seawall foundation construction area, the cement mixing piles are arranged in a comb-like manner and in a grid-like manner, the breakwater body is constructed with caissons, the cement mixing piles located below the rear toe of the caisson in the breakwater foundation in the caisson placement area are arranged in a grid-like manner, and the cement mixing piles at other positions in the breakwater foundation are arranged in a comb-like manner with comb teeth arranged along the front and rear direction of the caisson, and a block stone bed is dumped above the cement mixing piles; Step 2, embankment structure construction: prefabricate caissons in an onshore caisson prefabrication plant, a first hole is opened on the wall of the caisson on the wave-facing side, the first hole is connected to the compartment on the wave-facing side of the caisson, a second hole is opened on the upper part of the wall of the caisson on the back-wave side, the second hole is connected to the compartment on the back-wave side of the caisson, the caisson is transported to the construction site by a semi-submersible barge, and placed on the breakwater foundation, energy dissipation blocks are placed in the compartment on the wave-facing side of the caisson by water hoisting, artificial reefs are embedded in some compartments on the back-wave side of the caisson by water hoisting, and inert waste is filled in other compartments of the caisson; Step 3: Construction of wave-breaking wall structure: prefabricate a top plate on land, the upper surface of which is integrally provided with an energy dissipation sill and a wave-breaking wall, install the top plate on the top of the caisson by water hoisting, the top of the caisson is provided with a number of embedded steel sections, the top plate is assembledly connected to the embedded steel sections, and concrete is poured at the connection node between the top plate and the caisson; Step 4: Construction of bottom protection structure: The gridded gabion is filled with stones on land, transported to the construction site by flat barge, and then hoisted on water to be placed in front of and behind the caisson. The front of the caisson refers to the direction of the caisson close to the wave-facing side, and the rear of the caisson refers to the direction of the caisson close to the wave-shielding side.

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