CN114718012A - Composite dyke body ecological sea dike structure on soft soil foundation and construction method thereof - Google Patents
Composite dyke body ecological sea dike structure on soft soil foundation and construction method thereof Download PDFInfo
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- CN114718012A CN114718012A CN202210479306.4A CN202210479306A CN114718012A CN 114718012 A CN114718012 A CN 114718012A CN 202210479306 A CN202210479306 A CN 202210479306A CN 114718012 A CN114718012 A CN 114718012A
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- 238000010276 construction Methods 0.000 title claims abstract description 43
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- 239000004576 sand Substances 0.000 claims abstract description 43
- 244000025254 Cannabis sativa Species 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 7
- 239000011435 rock Substances 0.000 claims description 7
- 239000004746 geotextile Substances 0.000 claims description 6
- 241000826495 Petrophytum Species 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
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- 238000001764 infiltration Methods 0.000 description 2
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- 238000004642 transportation engineering Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
- E02B3/125—Flexible prefabricated covering elements, e.g. mats, strips mainly consisting of vegetable material, e.g. wood, reeds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/14—Preformed blocks or slabs for forming essentially continuous surfaces; Arrangements thereof
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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Abstract
The invention discloses a composite dyke body ecological seawall structure on a soft soil foundation and a construction method thereof, wherein the composite dyke body ecological seawall structure comprises: the sea wall comprises a sea wall foundation, a composite embankment body structure, a protection structure and a greening structure; the composite embankment body structure comprises: the embankment core stone comprises lower embankment core stones dumped on a sea dike foundation, an inverted filter structure dumped along the side slope of the lower embankment core stones close to the bank and towards the land area, embankment core sand or embankment core soil dumped along the side slope of the inverted filter structure close to the bank and land area, and upper embankment core stones dumped on the tops of the lower embankment core stones, the inverted filter structure and the embankment core sand or embankment core soil, wherein the embankment core sand or the embankment core soil is internally provided with an impervious wall; the greening structure comprises: and the three-dimensional grass planting mat is paved on the top surface of the plowing and planting soil. The invention greatly reduces the construction difficulty of the impervious wall, improves the work efficiency and the quality, ensures the stability of the seawall on the soft soil foundation, greatly reduces the settlement of the seawall and ensures that the impervious wall is not pulled apart due to the settlement of the seawall body.
Description
Technical Field
The invention relates to the technical fields of water transportation engineering, water conservancy engineering, river channel treatment engineering and the like. More particularly, the present invention relates to an ecological sea wall structure of a composite embankment body on a soft soil foundation and a construction method thereof.
Background
The traditional construction of the sea wall structure generally comprises the steps of firstly excavating and replacing foundation trenches, then throwing and filling core stones, then installing facing blocks, pouring wave walls, pavement structures and the like. The construction method of the sea wall structure has the following defects: firstly, the excavation amount of the foundation trench is large, the influence on the ecological environment of the surrounding water area is large, and the influence on the safety of adjacent buildings is also caused; secondly, the consumption of the block stones is large, the dike body is composed of the block stones, the stone material demand is large, the riprap construction strength is high, the engineering cost is high, the construction difficulty of the impervious wall in the riprap dike body is large, the work efficiency is low, the quality is difficult to guarantee, and the cost is high; thirdly, the sea side of the seawall is communicated with the land side, and the sea water is easy to flow backwards to submerge the land area; fourthly, the seawall is completely composed of the rock block and the concrete structure, and the requirements of the ecological seawall are not met.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
To achieve these objects and other advantages in accordance with the present invention, there is provided a composite body-embankment structure on a soft soil foundation, comprising: the sea wall structure comprises a sea wall foundation, a composite embankment body structure arranged on the sea wall foundation, a protection structure arranged on the sea side slope surface and the top of the composite embankment body structure, and a greening structure arranged on the bank side slope surface of the composite embankment body structure;
the composite dyke body structure comprises: the embankment core stone comprises lower embankment core stones dumped on the sea wall foundation, inverted filter structures dumped along the side slopes close to the bank of the lower embankment core stones and dumped towards the land area, embankment core sand or embankment core soil dumped along the side slopes close to the bank of the inverted filter structures and upper embankment cores dumped on the tops of the lower embankment core stones, the inverted filter structures and the embankment core sand or embankment core soil, wherein the upper embankment core stones only cover partial top surfaces of the embankment core sand or embankment core soil, the embankment core sand or embankment core soil is internally provided with a seepage-proof wall, and the bottom of the seepage-proof wall extends into the sea wall foundation;
the greening structure comprises: and the three-dimensional grass planting mat is paved on the top surface of the plowing and planting soil.
Preferably, the seawall foundation includes a cement mixing pile disposed in a soft soil foundation.
Preferably, the cement mixing piles are arranged in a grid shape.
Preferably, the lower core stone and the cut-off wall are within a sea wall foundation, and the sea wall foundation is built into a soft soil foundation in front of the sea side slope of the lower core stone.
Preferably, the guard structure includes: the embankment core stone protecting wall comprises a block stone cushion layer laid on the upper embankment core stone and the lower embankment core stone near the sea side slope surface, bottom protecting block stones laid on a sea wall foundation in front of the lower embankment core stone near the sea side slope surface, a face protecting block laid on the bottom protecting block stones and the block stone cushion layer, and a wave blocking wall arranged on the top surface of the upper embankment core stone.
Preferably, the method further comprises the following steps: and the pavement structure is built on the top surface of the upper dyke core stone and is positioned between the wave-retaining wall and the greening structure.
Preferably, the impervious wall is a high-pressure jet grouting pile impervious wall or a cement mixing pile impervious wall.
Preferably, the inverted filter structure consists of two stone bedding layers, a mixed inverted filter layer and a geotextile layer.
The invention also provides a construction method of the composite dyke body ecological sea wall structure on the soft soil foundation, which comprises the following steps:
step one, constructing a sea wall foundation: the method comprises the following steps of (1) driving cement mixing piles in a sea wall foundation building area, wherein the cement mixing piles are arranged in a grid shape;
step two, construction of a composite embankment body structure: firstly, filling lower dyke core stones on a sea wall foundation, wherein the filling area of the lower dyke core stones is in a partial area of the bank-approaching side of the sea wall foundation, filling a reversed filter structure along the slope of the bank-approaching side of the lower dyke core stones towards a land area, wherein the reversed filter structure consists of two stone cushion layers, a mixed reversed filter layer and a geotextile layer, then filling dyke core sand or dyke core soil along the slope of the bank-approaching side of the reversed filter structure towards the land area, and finally filling upper dyke core stones on the tops of the lower dyke core stones, the reversed filter structure and the dyke core sand or dyke core soil, wherein the upper dyke core stones cover partial top surfaces of the dyke core sand or dyke core soil;
step three, diaphragm wall construction: constructing an impervious wall on the top surface of the rest part of the dyke core sand or dyke core soil by adopting a high-pressure jet grouting pile or cement mixing pile construction method, wherein the bottom of the impervious wall extends into the sea wall foundation;
step four, greening structure and protection structure construction: and paving ploughing and planting soil along the upper dyke core stone shoring side slope surface to land areas, paving a three-dimensional grass planting mat on the top surface of the ploughing and planting soil, paving a rock mat layer on the upper dyke core stone and the lower dyke core stone shoring side slope surface, paving bottom protection rock blocks on a sea wall foundation in front of the lower dyke core stone shoring side slope surface, paving facing blocks on the bottom protection rock blocks and the rock mat layer, building a wave wall on the top surface of the upper dyke core stone, and building a road surface structure between the wave wall and the greening structure on the top surface of the upper dyke core stone.
The invention at least comprises the following beneficial effects: the cement mixing pile foundation is adopted to replace the foundation trench excavation commonly used in the original sea wall construction for replacement filling, the influence of the sea wall soft soil foundation excavation on the water area environment and the influence on the safety of surrounding buildings can be avoided, the double-layer structure is adopted in the composite embankment body structure, the inverted filter structure and the embankment core sand or the embankment core soil are adopted in the lower layer structure to replace the dyke core stone which is integrally and completely used in the original sea wall construction, the demand of the sea wall construction on the dyke core stone is greatly reduced, the engineering cost is reduced, the construction difficulty of the impervious wall is greatly reduced, the work efficiency and the quality are improved, the impervious wall can also prevent seawater from being poured over the land area, and meanwhile, the greening structure constructed on the embankment side of the embankment body enables the sea wall to meet the ecological environment protection requirements, so the sea wall structure provided by the invention has great significance for the construction of a novel sea wall.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic cross-sectional structure view of an ecological sea wall structure of a composite embankment body according to an embodiment of the present invention;
FIG. 2 is a plan view of cement mixing piles arranged in a grid in a sea wall foundation according to an embodiment of the present invention;
in the figure, 1 is a sea wall foundation, 21 is a lower dyke core stone, 22 is an inverted filter structure, 23 is dyke core sand or dyke core soil, 24 is an upper dyke core stone, 3 is an impervious wall, 41 is plowed and planted soil, 42 is a three-dimensional grass planting cushion, 51 is a rock block cushion layer, 52 is a face protection block body, 53 is a wave retaining wall, 54 is a road surface structure, and 55 is a bottom protection rock block.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials described therein are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Because the dike body in the traditional sea dike structure is formed by accumulating dike core stones, the consumption of the dike core stones is large, and the gaps of the dike core stones are not beneficial to seepage prevention, in order to improve the seepage prevention effect, a seepage-proof wall also needs to be built in the dike body of the dike core stones, and the construction difficulty of the seepage-proof wall is greatly reduced by building the seepage-proof wall in the dike body of all the dike core stones, although some sea dike structures have grooves in the dike body for throwing and filling dike core sand or dike core soil at present, and the seepage-proof wall is built in the dike core sand or dike core soil for reducing the construction difficulty of the seepage-proof wall, because the dike core sand or dike core soil is thrown and filled in the middle of the dike body, the dike body close to the sea side and the dike side cannot be connected, so that the structural strength of the dike body is reduced, the section of the dike body needs to be wider for filling and filling the dike core sand or dike core soil only by waiting for filling and filling the dike stone at the two sides of the grooves, the working procedure has long multiplex period.
In order to solve the above problems, as shown in fig. 1, the present invention provides an ecological sea wall structure of a composite embankment body on a soft soil foundation, comprising: the sea wall structure comprises a sea wall foundation 1, a composite embankment body structure arranged on the sea wall foundation 1, a protection structure arranged on the sea side slope surface and the top of the composite embankment body structure, and a greening structure arranged on the bank side slope surface of the composite embankment body structure;
the composite embankment body structure comprises: a lower dyke stone 21 dumped on the sea wall foundation 1, an inverted filter structure 22 dumped on land along the side slope of the lower dyke stone 21 close to the bank, dyke sand or dyke soil 23 dumped on land along the side slope of the inverted filter structure 22 close to the bank, and an upper dyke stone 24 dumped on the top of the lower dyke stone 21, the inverted filter structure 22 and the dyke sand or dyke soil 23, wherein the upper dyke stone 24 only covers part of the top surface of the dyke sand or dyke soil 23, a seepage-proofing wall 3 is arranged in the dyke sand or dyke soil 23, and the bottom of the seepage-proofing wall 3 extends into the sea wall foundation 1;
the greening structure comprises: a cultivation soil 41 which is laid along the side slope of the upper-part dyke core stone 24 against the bank to land, and a three-dimensional grass mat 42 which is laid on the top surface of the cultivation soil 41.
In the above embodiment, by adopting a double-layer structure in the composite embankment body structure and adopting the inverted filter structure 22 and the embankment core sand or embankment core soil 23 in the lower layer structure to replace the embankment core stone which is used for the whole construction of the original sea embankment, the demand of the sea embankment for the embankment core stone is greatly reduced, the construction cost is reduced, the impervious wall 3 is conveniently constructed in the embankment core sand or embankment core soil 23, the construction difficulty of the impervious wall 3 is greatly reduced, the work efficiency and the quality are improved, the impervious wall 3 can also prevent seawater from flowing backwards to submerge the land area, meanwhile, the dike core sand or dike core soil 23 is dumped and filled on one side of the lower dike core stone 21 close to the bank, so that the lower dike core stones 21 are not separated, the connection is tight, the structural strength of the dike body is ensured, the width of the dike body does not need to be widened, the material consumption is reduced, the engineering cost is reduced, the dike core stone is dumped and filled only on one side of the dike core sand or dike core soil 23 in the dike body building process, the working procedures are fewer, and the construction period is saved. In addition, the seawall meets the ecological environment protection requirement due to the greening structure constructed on the side, close to the bank, of the bank body, so that the seawall structure provided by the invention has great significance for the construction of a novel seawall.
Because the seawall foundation 1 in the traditional seawall structure is generally constructed in an excavation and replacement mode, the excavation amount of a foundation trench is large, the influence on the ecological environment of the surrounding water area is large, and the influence on the safety of adjacent buildings can be caused.
In order to solve the above problem, in another embodiment, the seawall foundation 1 adopts a cement mixing pile composite foundation, and the seawall soft soil foundation is reinforced by using cement mixing piles.
Specifically, within the construction range of the seawall foundation 1, the cement mixing piles are arranged in a grid shape (as shown in fig. 2).
In the embodiment, the cement mixing pile foundation is adopted to replace the foundation trench excavation and filling commonly used in the original sea wall construction, so that the influence of the sea wall soft soil foundation excavation on the water area environment and the safety of surrounding buildings is avoided, the water permeability of the foundation is reduced, the seepage-proofing effect is enhanced, meanwhile, the settlement of the sea wall body is also reduced, the seepage-proofing wall 3 is prevented from being torn, and the seepage-proofing effect is also enhanced.
In another embodiment, the lower core stones 21 and the cut-off walls 3 are within the sea wall foundation 1, and the sea wall foundation 1 is built into a soft soil foundation in front of the sea side slope of the lower core stones 21. After the soft soil foundation is reinforced by the seawall foundation 1, the embankment body structure and the bottom protection structure on the seawall foundation 1 which is positioned in front of the embankment body and close to the sea side can be stabilized for a long time, the embankment body settlement is greatly reduced, and the impervious wall is prevented from being pulled apart due to settlement.
In another embodiment, the guard structure comprises: a block stone cushion layer 51 laid on the sea side slope surface of the upper and lower core stones 24, 21, a back-up block stone 55 laid on the sea wall foundation 1 in front of the sea side slope surface of the lower core stone 21, a back-up block 52 laid on the back-up block stone 55 and the block stone cushion layer 51, and a wave wall 53 provided on the top surface of the upper core stone 24. Thus, the sea wall foundation 1 in front of the embankment body and the embankment core stones in the embankment body can be protected from being eroded by the scouring of sea waves, and meanwhile, the block stone cushion layer 51 and the armor block 52 are ballasted on the slope surface of the upper embankment core stone 24 and the lower embankment core stone 21 close to the sea side, so that the stability of the embankment body structure is further enhanced, and the wave wall 53 can prevent the wave head from crossing the embankment top to scour the greening structure close to the sea side.
In another embodiment, further comprising: and the road surface structure 54 is built on the top surface of the upper dike core stone 24 and is positioned between the wave wall 53 and the greening structure. Thus, the traffic function of the seawall can be increased, and meanwhile, the road surface structure 54 can buffer even if the wave head crosses the wave wall 53, so that the greening structure is prevented from being damaged by direct scouring of the wave head crossing the wave wall 53.
In another embodiment, the cut-off wall 3 is a high-pressure jet grouting pile cut-off wall 3 or a cement mixing pile cut-off wall 3, because the construction of the high-pressure jet grouting pile or the cement mixing pile is simple and rapid, the formed cut-off wall 3 has better structural strength and cut-off effect.
In another embodiment, the inverted filter structure 22 is comprised of two sheets of stone underlayment, a hybrid inverted filter layer, and a geotextile layer. The inverted filter structure 22 can reduce the moisture infiltration line in the soft soil foundation, accelerate the dissipation of pore water pressure, enhance the stability of the dyke body structure and reduce the sand body loss caused by the infiltration of dyke core sand or dyke core soil 23 by water on the sea side.
The invention also provides a construction method of the composite dyke body ecological seawall structure on the soft soil foundation, which comprises the following steps:
step one, constructing a sea wall foundation 1: the cement mixing pile is arranged in a grid shape in a building area of the sea wall foundation 1, parameters such as cement mixing amount of the cement mixing pile need to be determined through pile testing, and the strength needs to meet design requirements;
step two, construction of a composite embankment body structure: firstly, filling lower dyke stones 21 on a sea wall foundation 1, wherein the filling area of the lower dyke stones 21 is in a partial area of the bank-approaching side of the sea wall foundation 1, then filling a reversed filter structure 22 along the slope of the bank-approaching side of the lower dyke stones 21 towards a land area, wherein the reversed filter structure 22 consists of two stone cushion layers, a mixed reversed filter layer and a geotextile layer, separating the lower dyke stones 21 from dyke sand or dyke soil 23 through grading change of the reversed filter structure 22, then filling dyke sand or dyke soil 23 along the slope of the reversed filter structure 22 towards the land area, and finally filling upper dyke stones 24 on the tops of the lower dyke stones 21, the reversed filter structure 22 and the dyke sand or dyke soil 23, wherein the upper dyke stones 24 cover partial top surfaces of the dyke sand or dyke soil 23;
step three, constructing the impervious wall 3: constructing an impervious wall 3 on the top surface of the rest part of the dyke core sand or dyke core soil 23 by adopting a high-pressure jet grouting pile or cement mixing pile construction method, wherein the bottom of the impervious wall 3 extends into the sea wall foundation 1, parameters such as cement mixing amount of the high-pressure jet grouting pile (or cement mixing pile) and the like need to be determined through pile testing, the strength needs to meet the design requirement, and the impervious effect needs to meet the requirement of a penetration test;
step four, greening structure and protection structure construction: the method comprises the steps of paving and filling plowing soil 41 to land areas along the side slope surface close to the bank of the upper dyke core stone 24, paving a three-dimensional grass planting pad 42 on the top surface of the plowing soil 41, paving a block stone cushion 51 on the side slope surface close to the sea of the upper dyke core stone 24 and the lower dyke core stone 21, paving a bottom protecting block stone 55 on the sea wall foundation 1 in front of the side slope surface close to the sea of the lower dyke core stone 21, paving a face protecting block 52 on the bottom protecting block stone 55 and the block stone cushion 51, building a wave wall 53 on the top surface of the upper dyke core stone 24, and building a road surface structure 54 between the wave wall 53 and the greening structure.
In the step one, the cement mixing piles arranged in a grid shape are adopted to reinforce the seawall foundation 1 of the formed cement mixing pile composite foundation 1 arranged in a grid shape, and after the foundation is reinforced, the mixing piles reach the design strength, so that the seawall embankment body structure can be dumped, the influence of foundation excavation on the water area environment is avoided, and the safety of surrounding buildings is ensured. The mixing piles are arranged in a grid shape (refer to fig. 2), so that the shearing resistance of the treated foundation can be effectively enhanced, the stability of the embankment body is ensured, the settlement of the embankment body is greatly reduced, and the anti-seepage wall is prevented from being pulled apart due to the settlement of the embankment body.
In the second step, the formed composite dyke body structure is formed by combining the lower dyke core stone 21, the inverted filter structure 22, the dyke core sand or dyke core soil 23 and the upper dyke core stone 24, so that on one hand, the use amount of block stones is reduced, the construction cost is reduced, on the other hand, the impervious wall 3 has good construction conditions in the dyke core sand or dyke core soil 23, the problems that the construction difficulty of the impervious wall 3 in stone throwing is high, the work efficiency is low, the quality is difficult to guarantee are solved, and the construction cost of the impervious wall 3 is greatly saved.
In the third step, the formed impervious wall 3 adopts a high-pressure jet grouting pile or cement mixing pile structure, so that the impervious wall 3 can be quickly formed in the dike core sand or dike core soil 23 in the composite dike body structure, the sea side water body is separated from the land area, and the seawater is prevented from flowing backward to submerge the land area.
In the fourth step, the greening structure adopts a combined structure of the plowing and planting soil 41 and the three-dimensional grass planting mat 42, the construction is simple and convenient, and the growth of vegetation can be better ensured.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (9)
1. The utility model provides an ecological embankment structure of compound dyke body on soft soil foundation which characterized in that includes: the sea wall structure comprises a sea wall foundation, a composite embankment body structure arranged on the sea wall foundation, a protection structure arranged on the sea side slope surface and the top of the composite embankment body structure, and a greening structure arranged on the bank side slope surface of the composite embankment body structure;
the composite dyke body structure comprises: the embankment core stone comprises lower embankment core stones dumped on the sea wall foundation, inverted filter structures dumped along the side slopes close to the bank of the lower embankment core stones and dumped towards the land area, embankment core sand or embankment core soil dumped along the side slopes close to the bank of the inverted filter structures and upper embankment cores dumped on the tops of the lower embankment core stones, the inverted filter structures and the embankment core sand or embankment core soil, wherein the upper embankment core stones only cover partial top surfaces of the embankment core sand or embankment core soil, the embankment core sand or embankment core soil is internally provided with a seepage-proof wall, and the bottom of the seepage-proof wall extends into the sea wall foundation;
the greening structure comprises: and the three-dimensional grass planting mat is paved on the top surface of the plowing and planting soil.
2. The ecological embankment structure of claim 1, wherein the embankment foundation comprises cement mixing piles disposed in a soft soil foundation.
3. The ecological embankment structure of claim 2, wherein the cement mixing piles are arranged in a grid.
4. A composite body-dyke ecological embankment structure according to claim 2, wherein said lower dyke core stones and said cut-off walls are within the range of a dyke foundation, and said dyke foundation is built into a soft soil foundation in front of said lower dyke core stones on the sea side slope.
5. The ecological embankment structure of claim 4, wherein the protection structure comprises: the embankment core stone protecting wall comprises a block stone cushion layer laid on the upper embankment core stone and the lower embankment core stone near the sea side slope surface, bottom protecting block stones laid on a sea wall foundation in front of the lower embankment core stone near the sea side slope surface, a face protecting block laid on the bottom protecting block stones and the block stone cushion layer, and a wave blocking wall arranged on the top surface of the upper embankment core stone.
6. The ecological embankment structure of claim 5, further comprising: and the pavement structure is built on the top surface of the upper dyke core stone and is positioned between the wave-retaining wall and the greening structure.
7. The ecological embankment structure of claim 1, wherein the cut-off wall is a high pressure jet grouting pile cut-off wall or a cement mixing pile cut-off wall.
8. The ecological embankment structure of composite body of dykes according to claim 1, wherein the inverted filter structure is composed of two sheets of stone underlayments, a hybrid inverted filter layer and a geotextile layer.
9. A construction method of a composite dyke body ecological sea wall structure on a soft soil foundation is characterized by comprising the following steps:
step one, constructing a sea wall foundation: the method comprises the following steps of (1) driving cement mixing piles in a sea wall foundation building area, wherein the cement mixing piles are arranged in a grid shape;
step two, construction of a composite embankment body structure: firstly, filling lower dyke core stones on a sea wall foundation, wherein the filling area of the lower dyke core stones is in a partial area of the bank-approaching side of the sea wall foundation, filling a reversed filter structure along the slope of the bank-approaching side of the lower dyke core stones towards a land area, wherein the reversed filter structure consists of two stone cushion layers, a mixed reversed filter layer and a geotextile layer, then filling dyke core sand or dyke core soil along the slope of the bank-approaching side of the reversed filter structure towards the land area, and finally filling upper dyke core stones on the tops of the lower dyke core stones, the reversed filter structure and the dyke core sand or dyke core soil, wherein the upper dyke core stones cover partial top surfaces of the dyke core sand or dyke core soil;
step three, diaphragm wall construction: constructing an impervious wall on the top surface of the rest part of the dyke core sand or dyke core soil by adopting a high-pressure jet grouting pile or cement mixing pile construction method, wherein the bottom of the impervious wall extends into the sea wall foundation;
step four, greening structure and protection structure construction: and paving ploughing and planting soil along the upper dyke core stone shoring side slope surface to land areas, paving a three-dimensional grass planting mat on the top surface of the ploughing and planting soil, paving a rock mat layer on the upper dyke core stone and the lower dyke core stone shoring side slope surface, paving bottom protection rock blocks on a sea wall foundation in front of the lower dyke core stone shoring side slope surface, paving facing blocks on the bottom protection rock blocks and the rock mat layer, building a wave wall on the top surface of the upper dyke core stone, and building a road surface structure between the wave wall and the greening structure on the top surface of the upper dyke core stone.
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