CN116752483A - Underwater gravity block water-permeable sand-fixing method - Google Patents
Underwater gravity block water-permeable sand-fixing method Download PDFInfo
- Publication number
- CN116752483A CN116752483A CN202310684188.5A CN202310684188A CN116752483A CN 116752483 A CN116752483 A CN 116752483A CN 202310684188 A CN202310684188 A CN 202310684188A CN 116752483 A CN116752483 A CN 116752483A
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- Prior art keywords
- water
- sand
- underwater
- permeable sand
- gravity block
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- 230000005484 gravity Effects 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000004576 sand Substances 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000001914 filtration Methods 0.000 claims abstract description 24
- 239000013305 flexible fiber Substances 0.000 claims abstract description 5
- 235000014653 Carica parviflora Nutrition 0.000 claims description 13
- 241000243321 Cnidaria Species 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000007664 blowing Methods 0.000 abstract description 7
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000010169 landfilling Methods 0.000 abstract 2
- 230000008635 plant growth Effects 0.000 abstract 1
- 239000002689 soil Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 241000196324 Embryophyta Species 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241000242757 Anthozoa Species 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- E02B3/18—Reclamation of land from water or marshes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Abstract
The invention provides a water-permeable sand-fixing method for underwater gravity blocks, wherein a water-permeable sand-filtering layer is arranged on the surface of a sand body which can move underwater, the gravity blocks are arranged at the upper part according to the clear interval of the blocks, and the gravity blocks are fixed by flexible fiber connecting members; the gravity block keeps stable under the action of water flow, the surface of the gravity block is provided with a plant growth soil layer under hydrophilic, and the permeable sand filtering layer allows water to pass through but prevents sand from entering and exiting. The invention solves the problem of long-term settlement of the land-filling foundation caused by sand movement and loss in the sand-blowing land-filling island.
Description
Technical Field
The invention relates to the technical field of sea filling and land making, in particular to a water-permeable sand-fixing method by utilizing an underwater gravity block.
Background
Sand loss is a common problem encountered by manual sea filling, and the ground subsidence phenomenon caused by sand loss directly affects the safety and normal use of ground buildings.
Heretofore, the methods for sand protection in land reclamation mainly fall into two main categories: the lower part is provided with a dyke and the upper part is provided with a wave-absorbing block. The dyke is to set up dykes and dams in the lower part of the hydraulic filling range, prevent the sand body from flowing outwards. Under the impact of sea waves, sand bodies inside the dike can form underwater landform remodeling, and land making subsidence is caused. The wave-absorbing block arranged on the bank side has no sand-fixing function, and the lower sand body of the wave-absorbing block is hollowed out by sea wave scouring, so that the wave-absorbing block is sunk, and the land is sunk. Thus, the existing sea-filling land-making technology cannot prevent sand movement, and provides conditions for land-making settlement.
The sand blowing method adopted in the sea reclamation is used for damaging the coral growth and is characterized in that: coral cannot grow on the sand body, and the sand body lifted by ocean waves blocks the coral air holes, so that the coral dies. Therefore, how to provide the necessary conditions for coral growth is one of the problems to be solved.
Practice shows that the conventional water precast block shore protection technology can limit the movement of sand bodies, but the precast concrete blocks adopted by the shore protection are insufficient in weight (the weight convenient to install by manpower is adopted), the sand filtering layer is too weak (geotechnical cloth is only adopted), the precast concrete blocks are not connected with each other, the impact of sea waves is difficult to resist, and the method is not suitable for sand fixation in marine environments. In addition, the concrete product is alkaline, which is unfavorable for the growth of coral.
Disclosure of Invention
The invention aims to provide a water-permeable sand-fixing method for an underwater gravity block, which at least can solve the problems of foundation settlement deformation caused by sand body movement and loss of sand blowing and sea filling and recover the necessary environment required by coral growth.
In order to achieve the above purpose, the present invention adopts the following technical scheme.
The underwater gravity block water-permeable sand-fixing method includes that a sand-fixing structure consists of a water-permeable sand-filtering layer, a gravity block and a connecting component; the water permeable sand filtering layer is arranged in the range of the movement of the sand body caused by the movement of the water body, the adjacent gravity blocks are distributed on the water permeable sand filtering layer according to the net spacing of the blocks, and the adjacent gravity blocks are connected into a whole through connecting members.
Further: the water-permeable sand-filtering layer mainly comprises a water-permeable sand-filtering fabric, a small-mesh protection net and a large-mesh protection net; the permeable sand filtering fabric allows water to pass through, but does not allow sand to enter and exit, and is resistant to corrosion and pollution to the water; the small-mesh protective net and the large-mesh protective net are flexible nets, have corresponding tensile strength, are resistant to water corrosion and have no pollution to water. Wherein the small and large mesh are relative and the pore size is determined by one skilled in the art based on the pore size of the sand.
Still further: the weight and shape characteristics of the gravity block meet the requirement of not moving under the action of water flow, and the gravity block can be made into mutually embedded or independent shapes; the gravity block is a precast block, and a steering groove for installing a connecting component is reserved; the surface of the gravity block is sprayed with a biological induction layer which is favorable for the growth of underwater organisms such as coral and the like. In the present invention, the biostimulation layer refers to a coating or a polymer material capable of inducing underwater organisms to accumulate on the surface of the anchor block, and the type of the coating or the polymer material is determined by a person skilled in the art according to the organism type selection in a specific water area.
Still further: the connecting component consists of a penetrating fiber expanding structure and a flexible fiber braided rope; during installation, the penetrating fiber expansion structure is placed into the vertical groove of the steering groove, then transversely moves to the end part of the transverse groove, and finally the vertical groove of the steering groove is plugged by the plugging plug with the underwater adhesive.
Also to be described is: the block clearance is determined by the space required by the rotation of the gravity block and the space required by the water seepage in the sand body when the topography is changed; planting underwater plants within the range of the block clear distance, and preventing ultraviolet rays from corroding permeable sand filtering fabrics, small-mesh protective nets and large-mesh protective nets.
The underwater gravity block water-permeable sand-fixing method comprises the following implementation steps: firstly, determining a water-permeable sand-fixing range according to the influence depth and the water flow speed of historical sea waves of a project site on a lower water body; designing a permeable sand filtering layer, a gravity block, a connecting member and a block net distance according to specific conditions such as project water flow rate and the like; prefabricating a gravity block and a plugging plug for standby; paving a permeable sand filtering layer, hoisting a gravity block on the water surface and installing a connecting member under water; planting underwater plants within the range of the block net spacing.
The beneficial effects are that: according to the invention, the underwater sand body is fixed, so that the sand body is prevented from losing under the action of seawater, the problem of long-term settlement of the foundation of the land reclamation can be fundamentally solved, and the land reclamation achievement can be ensured not to be dissipated; according to the invention, the underwater sand body is sealed, so that the biggest defect of damage to the marine environment caused by sand blowing and island filling is overcome, the coral growth environment is remodeled, and the environmental protection value is extremely high; the invention fills the defect that the sand-blowing island-filling technology is not closed, so that the sand-blowing island-filling technology becomes a complete and closed technology chain, and is beneficial to the wider popularization of the technology.
Drawings
FIG. 1 is a schematic cross-sectional view of a water gravity block water-permeable sand-fixing method in an embodiment;
FIG. 2 is a schematic plan view of a water gravity block water-permeable sand-fixing method in an embodiment;
FIG. 3 is a schematic diagram of a gravity block of the underwater gravity block water-permeable sand-fixing method in the embodiment;
FIG. 4 is a schematic diagram of a gravity block connection flow in the underwater gravity block water-permeable sand-fixing method in the embodiment;
FIG. 5 is a schematic cross-sectional view of a connecting member in the water gravity block water-permeable sand-fixing method in the embodiment;
FIG. 6 is a schematic partial cross-sectional view of an embodiment of a method for water-permeable and sand-fixing by a submerged gravity block;
FIG. 7 is a schematic view of the portion of the T-shaped turning groove in the embodiment;
FIG. 8 is a schematic perspective view of a connecting member in an embodiment;
fig. 9 is a schematic perspective view of a closure insert in an embodiment.
In the figure: 1-permeable sand filtering layer, 2-gravity block, 3-connecting component, 4-block net space, 5-permeable sand filtering fabric, 6-small mesh protection net, 7-large mesh protection net, 8-T-shaped steering groove, 81-vertical groove, 82-transverse groove, 9-biological induction layer, 10-pass type fiber expansion structure, 11-flexible fiber braided rope, 12-plugging insert and 13-underwater plant.
Detailed Description
The present invention is further described below with reference to the accompanying drawings and specific examples, which are provided to aid in understanding the principles of the present invention and its core ideas, but are not intended to limit the scope of the present invention. It should be noted that modifications to the present invention without departing from the principles of the invention would be obvious to one of ordinary skill in this art and would fall within the scope of the invention as defined in the appended claims.
Examples
Engineering profile: due to the action of sea waves, the earth surface of the earth is continuously settled, and corals nearby the sea are killed successively in a certain sand-blowing sea-filling earth-making project, so that the problems of earth surface settlement and coral growth are required to be solved. In order to solve the problems, the underwater gravity block water-permeable sand-fixing method is adopted to seal the flowing sand body.
The implementation steps are as follows in connection with fig. 1 to 6:
step 1, determining a water-permeable sand-fixing range according to the influence depth and the water flow speed of historical sea waves of a project location on a lower water body;
step 2, designing a permeable sand filtering layer 1, a gravity block 2, a connecting member 3 and a block clean space 4 according to specific conditions such as project water flow rate and the like, wherein a permeable sand filtering fabric 5 in the permeable sand filtering layer 1 adopts two layers of geotextiles; the small-mesh protection net 6 adopts a 17x1.8@100x100 reinforced geogrid, and the large-mesh protection net 7 adopts a 25x3@200x200 reinforced geogrid; the gravity block 2 is made of prefabricated concrete, and the shape of the gravity block is selected to be of a mutually embedded structure; the steering groove 8 is made into a T-shaped vertical groove, and is turned into a transverse groove near the center line of the gravity block 2; the surface biological induction layer 9 adopts a macromolecular coral growth induction material (shown in figures 1, 2, 3, 4 and 6 for details); the connecting member 3 adopts a carbon fiber structure; the penetrating fiber expansion structure 10 is a rectangular structure, wherein the annular structure adopts seawater-resistant stainless steel; the flexible fiber braided rope 11 adopts a carbon fiber braided rope (shown in detail in fig. 5), and the net distance 4 between adjacent blocks is 60mm;
step 3, prefabricating the gravity block 2 and the plugging plug-in 12 according to design requirements for standby;
step 4, paving a permeable sand filtering layer 1 underwater within the range of the design requirement, hoisting the water surface according to the design requirement, and installing a gravity block 2 underwater in an auxiliary manner;
and 5, installing the gravity blocks 2, and simultaneously connecting the gravity blocks 2, wherein the connecting method comprises the following steps: transversely placing the connecting member 3 into the vertical slots 81 of the T-shaped steering slots 8 on two adjacent gravity blocks 2, and transversely moving the connecting member 3 to the end of the transverse slots 82 of the steering slots 8; the plugging insert 12 with the underwater adhesive is inserted into the vertical slot 81 of the T-turn slot 8 (see in detail fig. 4).
Step 6, repeating the step 4 and the step 5 to finish the sand body sealing within the design requirement range;
step 7, planting sea water plant seedlings in the range of the block net distance 4, and setting growth promoting materials;
and 8, sand sealing is carried out on the near-water ground which can be related to the sea wave according to a traditional shore protection method, and sand bodies are not allowed to enter the sea.
In this embodiment, the structure of the T-shaped steering groove 8 on the single adjacent gravity block 2 is shown in fig. 7, the structure of the connecting member 3 is shown in fig. 5 and 8, the through fiber enlarging structure 10 comprises a column body, the column body is provided with mutually crossed holes, the fiber wires firstly enter from the transverse holes on the column body, then are split into the longitudinal holes, are wound in a curved mode, and are solidified by the solidifying material; the structure of the closure insert 12 is shown in fig. 9.
Claims (5)
1. A water-permeable sand-fixing method for an underwater gravity block is characterized in that: the sand fixing structure consists of a water permeable sand filtering layer (1), a gravity block (2) and a connecting component (3); the water permeable sand filtering layer (1) is arranged in the range of the sand body movement caused by the water body movement, the adjacent gravity blocks (2) are distributed on the water permeable sand filtering layer (1) according to the block body net distance (4), and the adjacent gravity blocks (2) are connected into a whole through the connecting component (3).
2. The underwater gravity block water-permeable sand-fixing method of claim 1, wherein: the water-permeable sand filtering layer (1) mainly comprises a water-permeable sand filtering fabric (5), a small-mesh protection net (6) and a large-mesh protection net (7); the permeable sand filtering fabric (5) allows water to pass through, but does not allow sand to enter and exit, and is resistant to corrosion and pollution to the water; the small-mesh protective net (6) and the large-mesh protective net (7) are flexible nets, and are resistant to water corrosion and free of pollution to water.
3. The underwater gravity block water-permeable sand-fixing method of claim 1, wherein: the gravity block (2) is a precast block, and a steering groove (8) for installing the connecting component (3) is reserved; the surface of the gravity block (2) is sprayed with a biological induction layer (9) which is beneficial to the growth of underwater organisms such as coral and the like.
4. The underwater gravity block water-permeable sand-fixing method of claim 1, wherein: the connecting component (3) consists of a penetrating fiber expansion structure (10) and a flexible fiber braided rope (11); during installation, the penetrating fiber expansion structure (10) is firstly placed into the vertical groove of the steering groove (8), then transversely moves to the end part of the transverse groove, and finally the vertical groove of the steering groove (8) is blocked by a blocking plug (12) with an underwater adhesive.
5. The underwater gravity block water-permeable sand-fixing method of claim 1, wherein: planting underwater plants (13) in the block clean space (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310684188.5A CN116752483A (en) | 2023-06-11 | 2023-06-11 | Underwater gravity block water-permeable sand-fixing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310684188.5A CN116752483A (en) | 2023-06-11 | 2023-06-11 | Underwater gravity block water-permeable sand-fixing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116752483A true CN116752483A (en) | 2023-09-15 |
Family
ID=87952629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310684188.5A Pending CN116752483A (en) | 2023-06-11 | 2023-06-11 | Underwater gravity block water-permeable sand-fixing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116752483A (en) |
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2023
- 2023-06-11 CN CN202310684188.5A patent/CN116752483A/en active Pending
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