Coastal anti-scour fill embankment slope protection structure

Abstract

The utility model discloses a coastal anti-scour fill embankment slope protection structure which comprises an embankment slope protection body, and the embankment slope protection body comprises first geotechnical cloth, a plurality of sand filling pipe bags, second geotechnical cloth, a sand cushion layer and wave absorbing blocks. The first geotechnical cloth is sequentially arranged between the side slope and the sand cushion layer, between the side slope and the sand filling pipe bag, between the seabed and the sand filling pipe bag and between the seabed and the sand cushion layer in the extending direction from the side slope to the seabed. A plurality of sand filling pipe bags are arranged above the first geotechnical cloth; the second geotechnical cloth is arranged above the first geotechnical cloth; gaps are formed between every two adjacent sand filling pipe bags, between the sand filling pipe bags and the first geotechnical cloth and between the sand filling pipe bags and the second geotechnical cloth, and the gaps are filled with biological cement reinforcing sandy soil; the sand cushion layer is arranged above the second geotechnical cloth; and the wave absorbing blocks are arranged above the sand cushion layer.

Description

Technical Field

[0001] The utility model relates to the technical field of slopes of coastal filled embankments, and particularly relates to a coastal anti-erosion filled embankment slope protection structure. Background Technique

[0002] With the booming development of China's economy, the ordinary highway system has been continuously improved, and the highway service function has been continuously enhanced, promoting the integration process of various regions. As a key link connecting coastal cities and regions, the coastal highway not only effectively relieves traffic pressure, stimulates the development of the tourism industry, but also greatly promotes regional economic integration and coordinated development, accelerating the optimization and upgrading of the industrial structure; the construction of the coastal highway actively promotes the integration of transportation and tourism industries, speeds up the construction of the "highway +" development pattern, and promotes the deep integration of ordinary national and provincial trunk highways with local industries, tourism, and rural revitalization. Therefore, further strengthening the construction of the coastal highway is of great significance to the development of the coastal areas.

[0003] Since the coastal highway is located near the sea, it is inevitable to be washed by seawater for a long time. The impact of sea waves poses an important threat to the subgrade filling under the road surface. Therefore, a breakwater needs to be set up. The current breakwater is mainly composed of a sand cushion layer and grouted rubble blocks, which not only effectively weakens the impact of sea waves on the slope protection, but also to a certain extent prevents the seawater from scouring the subgrade filling; however, this construction method still has the following deficiencies: 1. The labor cost required for grouting rubble blocks is relatively high; 2. The ebb and flow caused by the tidal phenomenon affect the grouting time and construction period of the block construction, and at the same time, the quality of the blocks cannot be guaranteed; 3. The block resources are insufficient, and local materials cannot be used, and the procurement cost is relatively high.

[0004] Therefore, in order to further optimize the construction of the breakwater, save construction costs and enhance the strength of the breakwater, a coastal anti-erosion filled embankment slope protection structure with simple and efficient construction is urgently needed. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] The technical problem to be solved by the utility model is to provide a coastal anti-erosion filled embankment slope protection structure. Below the high water level line, a sand-filled tube bag subgrade filling is used for compaction, and the gaps between the sand-filled tube bags are filled with bio-cement-reinforced sand. At the same time, wave dissipating blocks are arranged on the upper layer of the slope protection main body to prevent waves; the sand-filled tube bags and wave dissipating blocks play the functions of compaction and wave prevention, and compared with grouted rubble blocks, they have the characteristics of convenient material collection and high construction efficiency in construction.

[0007] (2) Technical Solutions

[0008] The solution adopted by the present utility model to solve the above technical problems is a coastal erosion - proof fill embankment slope protection structure, which is arranged on the slope and the seabed. The coastal erosion - proof fill embankment slope protection structure includes an embankment slope protection main body, and the embankment slope protection main body includes a first geotextile, a plurality of sand - filled tube bags, a second geotextile, a sand cushion layer, and wave - dissipating blocks;

[0009] The first geotextile is successively arranged between the slope and the sand cushion layer, between the slope and the sand - filled tube bags, between the seabed and the sand - filled tube bags, and between the seabed and the sand cushion layer along the extension direction from the slope to the seabed;

[0010] The plurality of sand - filled tube bags are placed above the first geotextile; the plurality of sand - filled tube bags include multiple layers of sand - filled tube bags. Each layer of sand - filled tube bags is successively arranged along the direction parallel to the connecting line of the slope and the seabed, and the multiple layers of sand - filled tube bags are successively arranged along the extension direction from the slope to the seabed, and the multiple layers of sand - filled tube bags are successively arranged from bottom to top along the direction perpendicular to the seabed; moreover, the multiple layers of sand - filled tube bags are arranged with staggered joints in the direction perpendicular to the seabed and in the direction parallel to the connecting line of the slope and the seabed;

[0011] The second geotextile is arranged above the first geotextile; and the two farthest - apart ends of the second geotextile along the extension direction from the slope to the seabed are closely attached to the first geotextile, and the part between the two ends is spaced from the first geotextile to form a receiving space for receiving the plurality of sand - filled tube bags; and the second geotextile is successively arranged between the first geotextile and the sand cushion layer, between the sand - filled tube bags and the sand cushion layer, and between the first geotextile and the sand cushion layer along the extension direction from the slope to the seabed;

[0012] A gap is formed between every two adjacent sand - filled tube bags, between the sand - filled tube bags and the first geotextile, and between the sand - filled tube bags and the second geotextile, and the gap is filled with bio - cement - reinforced sandy soil;

[0013] The sand cushion layer is arranged above the second geotextile;

[0014] The wave - dissipating blocks are arranged above the sand cushion layer.

[0015] Specifically, the staggered joint arrangement means that when stacking the sand - filled tube bags in layers, the gaps formed between the sand - filled tube bags in any layer are arranged in a staggered manner with the gaps formed between the sand - filled tube bags in the adjacent layer.

[0016] In some embodiments, the gaps between the sand - filled tube bags in any layer are located at the center positions of the sand - filled tube bags in the adjacent layer, which helps to disperse the upper pressure of the sand - filled tube bags, enhance the integrity of the sand - filled tube bags, and at the same time, the cross - placement can reduce the scouring surface and improve the anti - scouring ability of the sand - filled tube bags.

[0017] With the above solution, the sand-filled tube bags used are convenient for construction. Compared with stones, the sand in the sand-filled tube bags can be directly obtained by hydraulic filling, reducing the transportation time and cost. The sand-filled tube bags use a slurry pump to pump sand for in-situ filling, greatly reducing the human resources.

[0018] In some embodiments, the embankment slope protection main body includes a first slope protection main body located below the high water level line and a second slope protection main body located above the high water level line.

[0019] The first slope protection main body is arranged on the slope and the seabed, and the first slope protection main body includes a first geotextile, a plurality of sand-filled tube bags, a second geotextile, a sand cushion layer, and wave dissipating blocks arranged in sequence from the inside to the outside.

[0020] The second slope protection main body is arranged on the slope, and the second slope protection main body includes a first geotextile, a second geotextile, a sand cushion layer, and wave dissipating blocks arranged in sequence from the inside to the outside.

[0021] Specifically, the second slope protection main body above the high water level line extends from the slope away from the seabed until the bottom of the road surface.

[0022] It should be noted that the high water level line is designed according to different application scenarios.

[0023] With the above solution, below the high water level line, the subgrade filling of the sand-filled tube bags is compacted, and the gaps between the sand-filled tube bags are filled with bio-cement reinforced sand. At the same time, wave dissipating blocks are arranged on the upper layer of the slope protection main body to prevent waves. The sand-filled tube bags and the wave dissipating blocks play the functions of compaction and wave prevention, and have the characteristics of convenient material collection and high construction efficiency compared with grouted rubble masonry in construction.

[0024] In some embodiments, the sand-filled tube bag is a long tube structure, and the cross-sections at both ends of the sand-filled tube bag along its length direction are arc-shaped, so that there are gaps between every two adjacent sand-filled tube bags, between the sand-filled tube bag and the first geotextile, and between the sand-filled tube bag and the second geotextile.

[0025] With the above solution, the setting of the gaps can be filled with bio-cement reinforced sand to ensure the stability of the entire structure.

[0026] In some embodiments, the first geotextile, the second geotextile, and the bag body of the sand-filled tube bag are all made of high-strength composite materials; and a plurality of first geotextiles and a plurality of second geotextiles are arranged side by side along the direction parallel to the connecting line of the slope and the seabed; the overlapping width between every two adjacent first geotextiles is not less than 1m, and the overlapping width between every two adjacent second geotextiles is not less than 1m.

[0027] Specifically, the high-strength composite material can be made of glass fiber or polypropylene filaments, with excellent strength properties, acid and alkali resistance properties, and extensibility. Its service life exceeds 50 years and is suitable for permanent slope protection projects. However, the service life of the existing geotextiles and the material of the sand-filled tube bag body used in slope protection projects does not exceed 20 years. The aging of the geotextiles and the bag body materials will pose potential hazards to permanent slope protection projects.

[0028] Adopting the above solution can ensure the connection stability between the first geotextiles and between the second geotextiles.

[0029] In some embodiments, the bio-cement reinforced sand includes sand, mineralized microorganisms, and biofibers. And, a calcium chloride solution is added to the sand, which can induce the mineralized microorganisms.

[0030] In some embodiments, the mineralized microorganisms are facultative anaerobic Bacillus pasteurii. Bacillus pasteurii has strong viability and is most suitable to survive in an environment with a temperature of 15 - 37°C and a pH of 9 - 10. The alkaline environment of seawater is beneficial to the metabolism of the bacterial strain, which can then promote the rapid reinforcement of sand. The biofibers are selected from agricultural waste fibers such as straw and straw stalks.

[0031] In some embodiments, the soil material of the sand cushion layer is bio-cement reinforced sand.

[0032] Adopting the above solution, the gaps between the sand-filled tube bags, between the sand-filled tube bags and the first geotextiles, and between the sand-filled tube bags and the second geotextiles are filled with bio-cement reinforced sand, and the soil material of the sand cushion layer is bio-cement reinforced sand. Through the metabolism of microorganisms, it induces the crystallization of insoluble carbonates on the surface of the sand, increasing the anti-seepage performance of the soil mass. It effectively solves the influence of seawater scouring on the gaps of the sand-filled tube bags, and can ensure that after the bag body of the sand-filled tube bag ages and is damaged, the overall slope protection still has a stable and complete structure, solving the problem that after the general geotextiles and the bag body of the sand-filled tube bag are damaged, due to the gaps between the bag bodies not being treated in time, it is easier to accelerate the erosion of seawater.

[0033] In some embodiments, the wave dissipating block is made of concrete by casting with a mold, and the edge of the wave dissipating block is smooth.

[0034] A construction method for a coastal anti-scouring filled embankment slope protection structure of the present utility model includes the following steps:

[0035] (1) Level the slope and seabed in the laying area of the main body of the embankment slope protection, and arrange the first geotextile above the slope and seabed in the laying area of the main body of the embankment slope protection; and a plurality of first geotextiles are arranged side by side along the direction parallel to the connecting line of the slope and the seabed; the overlapping width between every two adjacent first geotextiles arranged side by side is not less than 1 m; and the top and bottom between every two adjacent first geotextiles are fixed by steel pipes;

[0036] (2) First, lay a layer of sand-filled tube bags side by side along the connecting line of the slope and the seabed on the surface of the first geotextile on the seabed in the laying area of the main body of the embankment slope protection close to the slope; then, lay multiple layers of sand-filled tube bags in sequence from the slope to the seabed; and the adjacent two layers of sand-filled tube bags are arranged with staggered joints in the length direction;

[0037] (3) The gaps between the sand-filled tube bags and between the sand-filled tube bags and the slope are filled with bio-cement reinforced sand by pouring using a pumping device.

[0038] (4) The sand-filled tube bags need to be laid layer by layer, and the long sides and short sides of the sand-filled tube bags between the upper and lower layers are stacked with staggered joints. The number of sand-filled tube bags arranged in each layer is the same, ensuring that the slope of the water-facing slope formed after the sand-filled tube bags are stacked is the same as the slope of the slope located below the high water level; taking this as the standard, repeat steps (2) and (3) for each layer until stacked to the high water level;

[0039] (5) Pour and fill bio-cement reinforced sand upward from bottom to top in the gaps between the water-facing slopes of the sand-filled tube bags, and compact the water-facing slopes with a hydraulic vibrating rammer.

[0040] (6) Lay the second geotextile side by side along the connecting line of the slope and the seabed above the top of the slope and the sand-filled tube bags, the water-facing slope of the sand-filled tube bags, and the first geotextile close to the seabed; and the overlapping width between every two adjacent second geotextiles arranged side by side is not less than 1 m; fix the overlapping part of the first geotextile and the second geotextile on the slope and the seabed with steel pipes.

[0041] (7) Pour sand above the first geotextile and the second geotextile where the sand-filled tube bags are above the high water level, set a sand cushion layer, and compact the sand cushion layer with a hydraulic vibrating rammer.

[0042] (8) Arrange the wave dissipating blocks above the sand cushion layer by a hoisting device.

[0043] In some embodiments, in step (3), for the bio-cement reinforced sand, the sand containing biofibers is mixed with the mineralization-inducible microorganisms by spraying. The steps are as follows: first, spray the suspension of the mineralization-inducible microorganisms on the surface of the sand, then spray the calcium chloride and urea solutions, and repeat the above steps for secondary spraying to fully mix the mineralization-inducible microorganisms with the sand, thus completing the preparation of the bio-cement reinforced sand.

[0044] In some embodiments, in step (5) and step (7), the bio-cement reinforced sand and the sand cushion should be filled during the slack tide to reduce the loss of sand during the dumping process caused by water flow scouring.

[0045] (III) Beneficial effects

[0046] Compared with the prior art, the present utility model designs a coastal erosion-proof fill embankment slope protection structure.

[0047] (1) In the present utility model, below the high water level line, the sand-filled tube bags are used for subgrade filling and compaction. The gaps between the sand-filled tube bags are filled with bio-cement reinforced sand, and at the same time, wave dissipating blocks are arranged on the upper layer of the slope protection main body to prevent waves; the sand-filled tube bags and the wave dissipating blocks play the functions of compaction and wave prevention, and compared with the grouted rubble stones, they have the characteristics of convenient material collection and high construction efficiency in construction.

[0048] (2) The multi-layer sand-filled tube bags of the present utility model are arranged with staggered joints in the direction perpendicular to the seabed and in the direction parallel to the connecting line of the slope and the seabed, which helps to disperse the upper pressure of the sand-filled tube bags, enhance the integrity of the sand-filled tube bags, and at the same time, the cross-placement can reduce the scouring surface and improve the anti-scouring ability of the sand-filled tube bags.

[0049] (3) The sand-filled tube bags adopted in the present utility model are convenient for construction. Compared with stones, the sand for the sand-filled tube bags can be directly obtained by hydraulic filling, reducing the transportation time and cost; the sand-filled tube bags are filled in-situ by pumping sand with a slurry pump, greatly reducing the human resources.

[0050] (4) The first geotextile, the second geotextile, and the bag body of the sand-filled tube bags of the present utility model are all made of high-strength composite materials; such as glass fiber or polypropylene filament materials, which have excellent strength performance, acid and alkali resistance performance, and extensibility performance, and their service life exceeds 50 years, being suitable for permanent slope protection projects; while the materials of the geotextiles and the bag bodies of the sand-filled tube bags used in the existing slope protection projects have a service life of no more than 20 years, and the aging of the geotextile and the bag body materials will pose a hidden danger to the permanent slope protection project.

[0051] (5) The mineralized microorganism of the present utility model is facultative anaerobic Bacillus pasteurii. Bacillus pasteurii has strong viability and is most suitable to survive in an environment with a temperature of 15-37°C and a pH of 9-10. The alkaline environment of seawater is beneficial to the metabolism of the bacterial strain, which can promote the rapid reinforcement of sandy soil.

[0052] (6) The gaps between the sand-filled tube bags and between the sand-filled tube bags and the first geotextile and the second geotextile are filled with biocement to reinforce the sandy soil, and the soil material of the sand cushion layer is reinforced with biocement. Through the metabolism of microorganisms, insoluble carbonate crystals are induced to crystallize on the surface of the sandy soil, increasing the anti-seepage performance of the soil mass; effectively solving the influence of seawater scouring on the gaps of the sand-filled tube bags, it can ensure that the overall slope protection still has a stable and complete structure after the bag body of the sand-filled tube bag ages and is damaged, and solves the problem that after the general geotextile and the bag body of the sand-filled tube bag are damaged, due to the gaps between the bag bodies not being treated in time, it is easier to accelerate the erosion of seawater. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0054] Figure 1 It is a cross-sectional view of a coastal erosion-proof fill embankment slope protection structure of the present utility model;

[0055] Figure 2 is Figure 1 the sectional view taken along line A-A in

[0056] Figure 3 is Figure 1 the sectional view taken along line B-B in

[0057] Figure 4 It is a schematic diagram of the composition of the biocement-reinforced sandy soil of the present utility model.

[0058] The corresponding component names for the reference numerals in the drawings are: 1. Main body of the embankment slope protection; 1-1. First geotextile; 1-2. Sand-filled tube bag; 1-3. Biocement-reinforced sandy soil; 1-3-1. Sandy soil; 1-3-2. Microorganism; 1-3-3. Biological fiber; 1-4. Second geotextile; 1-5. Sand cushion layer; 1-6. Wave dissipating block; 2. Seabed; 3. Slope; 4. Road surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0059] The specific embodiments of the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0060] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0061] The following illustrates the implementation manners of the present application through specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope protected by the present application.

[0062] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement the device and / or practice the method. In addition, this device and / or this method can be implemented using other structures and / or functions in addition to one or more of the aspects described herein.

[0063] It should also be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner. The drawings only show the components related to the present application, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in its actual implementation can be an arbitrary change, and the component layout type may also be more complex.

[0064] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the examples can be practiced without these specific details.

[0065] The following describes the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.

[0066] As Figures 1 - 4As shown in the figure, the utility model provides a coastal erosion-proof fill embankment slope protection structure, which is arranged on the slope 3 and the seabed 2. The coastal erosion-proof fill embankment slope protection structure includes an embankment slope protection main body 1, and the embankment slope protection main body 1 includes a first geotextile 1-1, a plurality of sand-filled tube bags 1-2, a second geotextile 1-4, a sand cushion layer 1-5 and wave-dissipating blocks 1-6. The first geotextile 1-1 is sequentially arranged between the slope 3 and the sand cushion layer 1-5, between the slope 3 and the sand-filled tube bags 1-2, between the seabed 2 and the sand-filled tube bags 1-2, and between the seabed 2 and the sand cushion layer 1-5 along the extension direction from the slope 3 to the seabed 2. The plurality of sand-filled tube bags 1-2 are placed above the first geotextile 1-1. The plurality of sand-filled tube bags 1-2 include multiple layers of sand-filled tube bags 1-2, and each layer of sand-filled tube bags 1-2 is sequentially arranged along the direction parallel to the connecting line of the slope 3 and the seabed 2, and the multiple layers of sand-filled tube bags 1-2 are sequentially arranged along the extension direction of the slope 3 towards the seabed 2, and the multiple layers of sand-filled tube bags 1-2 are sequentially arranged from bottom to top along the direction perpendicular to the seabed 2. Moreover, the multiple layers of sand-filled tube bags 1-2 are arranged with staggered joints in the direction perpendicular to the seabed 2 and in the direction parallel to the connecting line of the slope 3 and the seabed 2. The second geotextile 1-4 is arranged above the first geotextile 1-1. And the two ends of the second geotextile 1-4 that are farthest apart along the extension direction from the slope 3 to the seabed 2 are closely arranged with the first geotextile 1-1, and the part located between the two ends is arranged at a distance from the first geotextile 1-1 to form a receiving space for receiving the plurality of sand-filled tube bags 1-2. And the second geotextile 1-4 is sequentially arranged between the first geotextile 1-1 and the sand cushion layer 1-5, between the sand-filled tube bags 1-2 and the sand cushion layer 1-5, and between the first geotextile 1-1 and the sand cushion layer 1-5 along the extension direction from the slope 3 to the seabed 2. A gap is formed between every two adjacent sand-filled tube bags 1-2, between the sand-filled tube bags 1-2 and the first geotextile 1-1, and between the sand-filled tube bags 1-2 and the second geotextile 1-4, and the gap is filled with bio-cement reinforced sandy soil 1-3. The sand cushion layer 1-5 is arranged above the second geotextile 1-4. The wave-dissipating blocks 1-6 are arranged above the sand cushion layer 1-5. Specifically, the staggered joint arrangement means that when stacking the sand-filled tube bags 1-2 in layers, the gaps formed between the sand-filled tube bags 1-2 in any layer are arranged in a staggered manner with the gaps formed between the sand-filled tube bags 1-2 in the adjacent layer. In some embodiments, the gaps between the sand-filled tube bags 1-2 in any layer are located at the central positions of the sand-filled tube bags 1-2 in the adjacent layer, which helps to disperse the upper pressure of the sand-filled tube bags 1-2, enhance the integrity of the sand-filled tube bags 1-2, and at the same time, the cross-placement can reduce the scouring surface and improve the anti-scouring ability of the sand-filled tube bags 1-2.Adopting the above solution, the sand-filled tube bag 1-2 is convenient for construction. Compared with stone materials, the sandy soil 1-3-1 of the sand-filled tube bag 1-2 can be directly obtained by hydraulic filling, reducing the transportation time and cost; the sand-filled tube bag 1-2 uses a slurry pump to pump the sandy soil 1-3-1 for in-situ filling, greatly reducing the human resources.

[0067] In some embodiments, the embankment slope protection main body 1 includes a first slope protection main body located below the high water level line and a second slope protection main body located above the high water level line; the first slope protection main body is arranged on the slope 3 and the seabed 2, and the first slope protection main body includes a first geotextile 1-1, a plurality of sand-filled tube bags 1-2, a second geotextile 1-4, a sand cushion layer 1-5 and a wave dissipating block 1-6 arranged in sequence from the inside to the outside; the second slope protection main body is arranged on the slope 3, and the second slope protection main body includes a first geotextile 1-1, a second geotextile 1-4, a sand cushion layer 1-5 and a wave dissipating block 1-6 arranged in sequence from the inside to the outside. Specifically, the second slope protection main body above the high water level line extends from the slope 3 away from the seabed 2 until the bottom of the road surface 4. Adopting the above solution, below the high water level line, the sand-filled tube bag 1-2 is used for subgrade filling and compaction, and the gaps between the sand-filled tube bags 1-2 are filled with bio-cement-reinforced sandy soil 1-3. At the same time, wave dissipating blocks 1-6 are arranged on the upper layer of the slope protection main body for wave prevention; the sand-filled tube bags 1-2 and the wave dissipating blocks 1-6 play the functions of compaction and wave prevention, and have the characteristics of convenient material collection and high construction efficiency compared with grouted rubble masonry.

[0068] In some embodiments, the sand-filled tube bag 1-2 is a long strip tube structure, and the cross sections at both ends of the sand-filled tube bag 1-2 along its length direction are arc-shaped, so that gaps are formed between every two adjacent sand-filled tube bags 1-2, between the sand-filled tube bag 1-2 and the first geotextile 1-1, and between the sand-filled tube bag 1-2 and the second geotextile 1-4. Adopting the above solution, the setting of the gaps can fill the bio-cement-reinforced sandy soil 1-3 to ensure the stability of the whole structure.

[0069] In some embodiments, the first geotextile 1-1, the second geotextile 1-4, and the bag body of the sand-filled tube bag 1-2 are all made of high-strength composite materials; and a plurality of first geotextiles 1-1 and a plurality of second geotextiles 1-4 are arranged side by side along the direction parallel to the connecting line of the slope 3 and the seabed 2; the overlapping width between every two adjacent first geotextiles 1-1 is not less than 1 m, and the overlapping width between every two adjacent second geotextiles 1-4 is not less than 1 m. Specifically, the high-strength composite material can be glass fiber or polypropylene filament material, which has excellent strength performance, acid and alkali resistance performance, and extensibility performance. Its service life exceeds 50 years and is suitable for permanent slope protection projects; while the materials of the existing geotextiles and the bag body of the sand-filled tube bag 1-2 used for slope protection projects have a service life of no more than 20 years, and the aging of the geotextile and the bag body material will pose a hidden danger to the permanent slope protection project. Adopting the above scheme can ensure the connection stability between the first geotextiles 1-1 and between the second geotextiles 1-4.

[0070] In some embodiments, the bio-cement reinforced sand 1-3 includes sand 1-3-1, mineralized microorganisms 1-3-2, and biofibers 1-3-3; and, a calcium chloride solution is added to the sand 1-3-1, which can induce the mineralized microorganisms 1-3-2. In some embodiments, the mineralized microorganisms 1-3-2 are facultative anaerobic Bacillus pasteurii. Bacillus pasteurii has strong viability and is most suitable to survive in an environment of 15-37 °C and a pH of 9-10. The alkaline environment of seawater is beneficial to the metabolism of the bacterial strain, which can further promote the rapid reinforcement of the sand 1-3-1; the biofibers 1-3-3 are selected from agricultural waste fibers such as straw and straw. The concentration of the calcium chloride solution is 1 mol / L, and the concentration of the bacterial solution of Bacillus pasteurii is OD600 = 1.0. In some embodiments, the soil material of the sand cushion layer 1-5 is bio-cement reinforced sand 1-3. Adopting the above scheme, the gaps between the sand-filled tube bags 1-2 and between the sand-filled tube bags 1-2, between the sand-filled tube bags 1-2 and the first geotextiles 1-1, and between the sand-filled tube bags 1-2 and the second geotextiles 1-4 are filled with bio-cement reinforced sand 1-3, and the soil material of the sand cushion layer 1-5 is bio-cement reinforced sand 1-3. Through the metabolism of the microorganisms 1-3-2, it induces the crystallization of insoluble carbonate on the surface of the sand 1-3-1, increasing the anti-seepage performance of the soil body; effectively solving the influence of seawater scouring on the gaps of the sand-filled tube bags 1-2, and ensuring that after the bag body of the sand-filled tube bags 1-2 is aged and damaged, the overall slope protection still has a stable and complete structure, solving the problem that after the general geotextiles and the bag body of the sand-filled tube bags 1-2 are damaged, due to the gaps between the bag bodies not being processed in time, it is easier to accelerate the erosion of seawater. In some embodiments, the wave dissipating blocks 1-6 are made of concrete by mold casting, and the edges of the wave dissipating blocks 1-6 are smooth.

[0071] A construction method for a coastal erosion-proof filling embankment slope protection structure of the utility model comprises the following steps:

[0072] (1) Level the slope 3 and the seabed 2 in the laying area of the embankment slope protection main body 1, and arrange the first geotextile 1-1 above the slope 3 and the seabed 2 in the laying area of the embankment slope protection main body 1; and a plurality of first geotextiles 1-1 are arranged side by side along the direction parallel to the connecting line of the slope 3 and the seabed 2; the overlapping width between every two adjacent first geotextiles 1-1 arranged side by side is not less than 1 m; and the top and bottom between every two adjacent first geotextiles 1-1 are fixed by steel pipes;

[0073] (2) First, lay a layer of sand-filled tube bags 1-2 side by side along the direction of the connecting line of the slope 3 and the seabed 2 on the surface of the first geotextile 1-1 on the seabed 2 in the laying area of the embankment slope protection main body 1 close to the slope 3; then, lay multiple layers of sand-filled tube bags 1-2 in sequence from the slope 3 to the seabed 2; and the adjacent two layers of sand-filled tube bags 1-2 are arranged with staggered joints in the length direction;

[0074] (3) The gaps between the sand-filled tube bags 1-2 and between the sand-filled tube bags 1-2 and the slope 3 are filled with bio-cement reinforced sandy soil 1-3 by means of pouring through a pumping device;

[0075] (4) The sand-filled tube bags 1-2 need to be laid layer by layer, and the long sides and short sides of the sand-filled tube bags 1-2 between the upper and lower layers are stacked with staggered joints. The number of sand-filled tube bags 1-2 arranged in each layer is the same, ensuring that the slope of the water-facing slope formed after the sand-filled tube bags 1-2 are stacked is the same as the slope of the slope 3 below the high water level; taking this as the standard, repeat steps (2) and (3) for each layer until stacking to the high water level;

[0076] (5) Pour and fill the bio-cement reinforced sandy soil 1-3 upward in the gaps between the water-facing slopes of the sand-filled tube bags 1-2, and compact the water-facing slope by a hydraulic vibration tamper;

[0077] (6) Lay the second geotextile 1-4 side by side along the direction of the connecting line of the slope 3 and the seabed 2 above the top of the slope 3 and the sand-filled tube bags 1-2, the water-facing slope of the sand-filled tube bags 1-2, and the first geotextile 1-1 close to the seabed 2; and the overlapping width between every two adjacent second geotextiles 1-4 arranged side by side is not less than 1 m; fix with steel pipes at the overlapping part of the first geotextile 1-1 and the second geotextile 1-4 on the slope and the seabed 2;

[0078] (7) Pour sandy soil 1-3-1 above the first geotextile 1-1 and the second geotextile 1-4 of the sand-filled tube bags 1-2 above the high water level, set a sand cushion 1-5, and compact the sand cushion 1-5 by a hydraulic vibration tamper;

[0079] (8) Arrange the wave dissipating blocks 1-6 above the sand cushion layer 1-5 by means of a hoisting device.

[0080] In some embodiments, in the step (3), the bio-cement reinforced sand 1-3 is prepared by spraying to mix the sand 1-3-1 containing biofibers 1-3-3 with the mineralization-inducible microorganisms 1-3-2. The steps are as follows: first, spray the suspension of the mineralization-inducible microorganisms 1-3-2 on the surface of the sand 1-3-1, then spray the calcium chloride and urea solutions, and repeat the above steps for secondary spraying to fully mix the mineralization-inducible microorganisms 1-3-2 with the sand 1-3-1, thus completing the preparation of the bio-cement reinforced sand 1-3.

[0081] In some embodiments, in the steps (5) and (7), the bio-cement reinforced sand 1-3 and the sand cushion layer 1-5 should be filled during the slack tide time to reduce the loss of the sand 1-3-1 during the dumping process caused by water flow scouring. For the same or similar parts among the various embodiments in this specification, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0082] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A coastal anti-scour fill embankment slope protection structure, arranged on a slope (3) and a seabed (2), characterized in that: The sea defense scour filling embankment slope protection structure comprises an embankment slope protection body (1), wherein the embankment slope protection body (1) comprises a first geotextile (1-1), a plurality of sand-filled tube bags (1-2), a second geotextile (1-4), a sand cushion layer (1-5) and wave-breaking blocks (1-6); The first geotextile (1-1) is sequentially arranged between the slope (3) and the sand cushion layer (1-5), between the slope (3) and the sand-filled tube bag (1-2), between the seabed (2) and the sand-filled tube bag (1-2), and between the seabed (2) and the sand cushion layer (1-5) along the extension direction from the slope (3) to the seabed (2); The plurality of sand-filled tube bags (1-2) are placed above the first geotextile (1-1); the plurality of sand-filled tube bags (1-2) include multiple layers of sand-filled tube bags (1-2), each layer of sand-filled tube bags (1-2) is sequentially arranged along a direction parallel to a connection line between the side slope (3) and the seabed (2), and the multiple layers of sand-filled tube bags (1-2) are sequentially arranged along a direction extending from the side slope (3) to the seabed (2), and the multiple layers of sand-filled tube bags (1-2) are sequentially arranged from bottom to top along a direction perpendicular to the seabed (2); and the multiple layers of sand-filled tube bags (1-2) are staggeredly arranged in a direction perpendicular to the seabed (2) and in a direction parallel to a connection line between the side slope (3) and the seabed (2); The second geotextile (1-4) is arranged above the first geotextile (1-1); and the two ends of the second geotextile (1-4) that are farthest apart along the extension direction from the slope (3) to the seabed (2) are arranged closely to the first geotextile (1-1), and the part between the two ends is arranged at a distance from the first geotextile (1-1), so as to form a receiving space for receiving the plurality of sand-filled tube bags (1-2); and the second geotextile (1-4) is arranged in sequence between the first geotextile (1-1) and the sand cushion layer (1-5), between the sand-filled tube bags (1-2) and the sand cushion layer (1-5), and between the first geotextile (1-1) and the sand cushion layer (1-5) along the extension direction from the slope (3) to the seabed (2); A gap is formed between every two adjacent sand-filled tube bags (1-2), between the sand-filled tube bag (1-2) and the first geotextile (1-1), and between the sand-filled tube bag (1-2) and the second geotextile (1-4), and the gap is filled with biocement reinforced sand (1-3); The sand cushion layer (1-5) is arranged above the second geotextile (1-4); The wave-breaking block (1-6) is arranged above the sand cushion layer (1-5).

2. The coastal anti-scour filling embankment slope protection structure according to claim 1 is characterized by: The embankment slope protection body (1) comprises a first slope protection body located below the high water line, and a second slope protection body located above the high water line; The first slope protection body is arranged on the slope (3) and the seabed (2), and the first slope protection body comprises, from the inside to the outside, a first geotextile (1-1), a plurality of sand-filled tube bags (1-2), a second geotextile (1-4), a sand cushion layer (1-5) and wave-breaking blocks (1-6); The second slope protection body is arranged on the slope (3), and the second slope protection body comprises a first geotextile (1-1), a second geotextile (1-4), a sand cushion layer (1-5) and a wave-breaking block (1-6) which are arranged in sequence from the inside to the outside.

3. The coastal anti-scour filling embankment slope protection structure according to claim 1 is characterized by: The sand-filled tube bag (1-2) is a long tube structure, and the cross-sections of the two ends of the sand-filled tube bag (1-2) along its length direction are arc-shaped, so that gaps are formed between every two adjacent sand-filled tube bags (1-2), between the sand-filled tube bag (1-2) and the first geotextile (1-1), and between the sand-filled tube bag (1-2) and the second geotextile (1-4).

4. The coastal anti-scour filling embankment slope protection structure according to claim 1 is characterized by: The first geotextile (1-1), the second geotextile (1-4), and the bag body of the sand-filled tube bag (1-2) are all made of high-strength composite materials; a plurality of first geotextiles (1-1) and a plurality of second geotextiles (1-4) are arranged side by side in a direction parallel to a connecting line between the slope (3) and the seabed (2); the overlap width between every two adjacent first geotextiles (1-1) is not less than 1 m, and the overlap width between every two adjacent second geotextiles (1-4) is not less than 1 m.

5. The coastal anti-scour filling embankment slope protection structure according to claim 1 is characterized by: The soil material of the sand cushion layer (1-5) is biocement reinforced sand (1-3).

6. The coastal anti-scour filling embankment slope protection structure according to claim 1 is characterized by: The wave-breaking block (1-6) is made by casting concrete through a mold, and the edge of the wave-breaking block (1-6) is smooth.

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