CN114960729A - Method for improving fortification standard of existing vertical scour prevention structure of dike foot - Google Patents
Method for improving fortification standard of existing vertical scour prevention structure of dike foot Download PDFInfo
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- CN114960729A CN114960729A CN202210514330.7A CN202210514330A CN114960729A CN 114960729 A CN114960729 A CN 114960729A CN 202210514330 A CN202210514330 A CN 202210514330A CN 114960729 A CN114960729 A CN 114960729A
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- 230000002265 prevention Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims description 27
- 238000010276 construction Methods 0.000 claims description 26
- 239000011150 reinforced concrete Substances 0.000 claims description 19
- 239000004575 stone Substances 0.000 claims description 18
- 239000000945 filler Substances 0.000 claims description 17
- 239000004567 concrete Substances 0.000 claims description 13
- 239000002689 soil Substances 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000002023 wood Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000002990 reinforced plastic Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000002759 woven fabric Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 230000007123 defense Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 description 6
- 230000000703 anti-shock Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000009991 scouring Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- E02D27/40—Foundations for dams across valleys or for dam constructions
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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
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
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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
- Y02A10/30—Flood prevention; Flood or storm water management, e.g. using flood barriers
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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Abstract
The invention discloses a method for improving the defense standard of an existing vertical scour prevention structure of a dike foot, which relates to the field of scour prevention protection of dike feet of dams in rivers, lakes, estuaries, gulfs and coastal areas, and comprises the following steps of digging out obstacles at the piling positions of new transverse densely-arranged short piles and new longitudinal densely-arranged long piles, piling the new transverse densely-arranged short piles and the new longitudinal densely-arranged long piles in sequence, and finally filling the space between the new longitudinal densely-arranged long piles and an existing vertical scour prevention structure The method for improving the existing vertical scour prevention structure fortification standard of the dike foot has the advantages of energy conservation, low carbon and low manufacturing cost.
Description
Technical Field
The invention relates to the field of scour prevention protection of dam feet of dams in rivers, lakes, estuaries, gulfs and coastal regions, in particular to a method for improving the fortification standard of an existing vertical scour prevention structure of the dam feet.
Background
The vertical scour protection structure of the dike foot is a structure for protecting the safety of the dike foot when the water facing side of the dike such as a dike, a sea wall, a spur dike, a forward dike, a submerged dike, a pan head and the like is washed by flood (tide, wave) water flow, and comprises densely arranged wooden piles, densely arranged reinforced concrete prefabricated plate piles, densely arranged reinforced concrete prefabricated square piles, densely arranged reinforced concrete prefabricated tubular piles, densely arranged reinforced concrete prefabricated small open caisson, densely arranged concrete cast-in-place piles, densely arranged steel plate piles, plastic steel plate piles and the like, and most of the structures are arranged on the outer side of a horizontal scour protection structure body. When the engineering needs to improve the defense standard of the embankment foot anti-impact structure, technicians often rebuild a vertical anti-impact structure with a horizontal anti-impact masonry structure outside the original vertical anti-impact structure, and the effect of the old vertical anti-impact structure is not considered any more when the length value of a cantilever of the new vertical anti-impact structure and the safety design of the new vertical anti-impact structure are designed.
Obviously, the prior art has high manufacturing cost and does not accord with the ecological and energy-saving low-carbon concepts.
Disclosure of Invention
The invention aims to provide a method for improving the fortification standard of an existing vertical scour prevention structure of a dike foot so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a method for improving the fortification standard of the existing vertical scour prevention structure of a dike foot comprises the following steps:
firstly, construction is carried out in a certain construction operation mode, and obstacles at the piling positions of new transverse close-packed short piles and new longitudinal close-packed long piles are excavated in the construction process;
step two, sequentially driving new transverse densely-arranged short piles and new longitudinal densely-arranged long piles one by one in a preset direction;
filling between the new longitudinal densely-arranged long piles and the existing vertical scour prevention structure;
the construction operation mode in the first step comprises underwater operation and dry land operation after building a water retaining cofferdam;
the preset inserting and driving directions of the new transverse close-packed short piles in the second step are the directions extending from one side of the existing vertical scour prevention structure to one side of the external river and the opposite directions of the directions;
the new transverse densely-arranged short piles and the new longitudinal densely-arranged long piles adopted in the second step are made of wood, reinforced concrete or plastic steel, such as wood piles, reinforced concrete prefabricated sheet piles, reinforced concrete prefabricated square piles, reinforced concrete prefabricated tubular piles, concrete cast-in-place piles, steel sheet piles, plastic steel sheet piles and the like;
the piles of the new longitudinal close-packed long piles are close to each other and are arranged on the side, which is scoured by the external river (sea), of the existing vertical scour prevention structure; the pile top of the new longitudinal close-packed pile does not contain cementing materials such as cast-in-place concrete or reinforced concrete, and the like, and the elevation of the pile top is lower than the average elevation between the top elevation of the existing vertical scour prevention structure and the originally designed scour prevention elevation, so that the function of the existing vertical scour prevention structure is utilized, the cantilever length of the pile is reduced, and the defects that the prior art is high in manufacturing cost and does not accord with ecological and low-carbon concepts are overcome;
the new transverse densely-arranged short piles are vertically or nearly vertically arranged between the existing vertical scour prevention structure and the new longitudinal densely-arranged long piles, the pile length is shorter than that of the new longitudinal densely-arranged long piles, and the pile top elevation is flush with or slightly lower than that of the new longitudinal densely-arranged long piles;
the new transverse close-packed short piles and the new longitudinal close-packed long piles form a continuous n-shaped embankment foot anti-shock structure, wherein the distance between two vertical lines below an upper horizontal line in the n-shaped long piles is marked as B, the length of a vertical line in the n-shaped short piles is marked as A, and the B of the structure is not shorter than the A. The new longitudinal close-packed long piles and the new transverse close-packed short piles are combined to form a continuous n-shaped structure on the plane and an existing vertical anti-shock structure are combined to form a lattice-shaped structure on the plane;
the filling in the step three has two modes, namely filling with filler and naturally slushing;
the filler material filled by the filler can be soil material, sand material, stone material, or mixture of soil and stone, or stone material packed in a net bag, or soil and stone material packed in a fabric woven bag, or precast blocks poured by cement concrete, or concrete;
and if the filler is filled in the third step, the filling top elevation of the filler close to one side of the close-packed piles is not higher than the design top elevation of the close-packed piles.
Preferably, the construction mode adopts underwater operation, and the construction cost can be greatly reduced and the construction period can be shortened by adopting the underwater operation.
As preferred, the new horizontal densely-arranged short piles and the new vertical densely-arranged long piles adopt densely-arranged wooden piles, the piles made of wood materials are easy to obtain, the pile bodies are light in weight, the processing cost and the inserting and driving cost of the piles are low, and the engineering cost can be greatly reduced under the condition of meeting the use requirements.
Preferably, the distance between two adjacent groups of new transverse close-packed short piles is two to ten times of the distance between the new longitudinal close-packed long piles and the existing vertical scour prevention structure, and the scour prevention performance of the embankment foot scour prevention structure arranged in the way is better.
Preferably, the filling is adopted in the construction operation to fill the space between the new longitudinal dense-row long pile and the existing vertical scour prevention structure, and the structure is more compact and compact after filling by adopting the filling compared with natural scouring.
Preferably, the filling material adopted by the construction filling is a mixture mixed by soil and stones, the mixture is used for filling and has the advantages of soil and stones, the cost is low, the filling has the advantage that the erosion resistance of the cavity part is strong, and the erosion resistance of the formed embankment foot erosion-resistant structure is better.
Preferably, the new transverse densely-arranged short piles and the new longitudinal densely-arranged long piles are densely-arranged timber piles, and the new transverse densely-arranged short piles are of a double-row structure.
In conclusion, the beneficial effects of the invention are as follows:
the invention adopts the combination of the new longitudinal close-packed long piles and the new transverse close-packed short piles to form continuous n-shaped piles on the plane, and the elevation of the pile top is lower than the average elevation between the existing vertical scour prevention structure top elevation and the original design scour prevention elevation, thereby reducing the cantilever length of the piles, overcoming the defects of high manufacturing cost and non-conformity with ecological and low-carbon concepts in the prior art, and providing the method for improving the existing vertical scour prevention structure fortification standard of the dyke legs, which has better ecological friendliness, energy conservation, low carbon and low manufacturing cost.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic three-dimensional structure diagram of the present invention for improving the existing vertical scour prevention structure of the dike foot;
FIG. 2 is a schematic top view of the structure of the present invention for improving the existing vertical shock-proof structure of the dike foot;
fig. 3 is a schematic top view of the structure of the present invention for improving the existing vertical scour prevention of the dike legs, wherein double rows of piles are used for the new transverse close-packed short piles and the new longitudinal close-packed long piles;
fig. 4 is a flowchart of a method for improving the fortification standard of an existing vertical scour prevention structure of a dike foot according to the present invention.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The invention will now be described in detail with reference to fig. 1-4, wherein for ease of description the orientations described below are now defined as follows: the up, down, left, right, front and rear directions described below correspond to the front, back, left, right, top and bottom directions of the view direction of fig. 1, fig. 1 is a front view of the apparatus of the present invention, and the directions shown in fig. 1 correspond to the front, back, left, right, top and bottom directions of the apparatus of the present invention.
Referring to fig. 1-4, an embodiment of the present invention is shown: a method for improving the fortification standard of an existing vertical scour prevention structure of a dike foot comprises the following steps:
firstly, construction is carried out in a certain construction operation mode, and obstacles at the piling positions of new transverse close-packed short piles and new longitudinal close-packed long piles are excavated in the construction process;
step two, sequentially driving new transverse densely-arranged short piles and new longitudinal densely-arranged long piles one by one in a preset direction;
filling between the new longitudinal densely-arranged long piles and the existing vertical scour prevention structure;
the construction operation mode in the first step comprises underwater operation and dry land operation after building a water retaining cofferdam;
the preset inserting and driving direction of the new transverse close-packed stub in the second step is the direction extending from one side of the existing vertical scour prevention structure to one side of the external river or the opposite direction;
the new transverse densely-arranged short piles and the new longitudinal densely-arranged long piles adopted in the second step are made of wood, reinforced concrete or plastic steel, such as wood piles, reinforced concrete prefabricated sheet piles, reinforced concrete prefabricated square piles, reinforced concrete prefabricated tubular piles, concrete cast-in-place piles, steel sheet piles, plastic steel sheet piles and the like;
the piles of the new longitudinal close-packed long piles are close to each other and are arranged on the side, which is scoured by the external river (sea), of the existing vertical scour prevention structure; the pile top of the new longitudinal close-packed pile does not contain cementing materials such as cast-in-place concrete or reinforced concrete, and the like, and the elevation of the pile top is lower than the average elevation between the top elevation of the existing vertical scour prevention structure and the originally designed scour prevention elevation, so that the function of the existing vertical scour prevention structure is utilized, the cantilever length of the pile is reduced, and the defects that the prior art is high in manufacturing cost and does not accord with ecological and low-carbon concepts are overcome;
the new transverse densely-arranged short piles are vertically or nearly vertically arranged between the existing vertical scour prevention structure and the new longitudinal densely-arranged long piles, the pile length is shorter than that of the new longitudinal densely-arranged long piles, and the pile top elevation is flush with or slightly lower than that of the new longitudinal densely-arranged long piles;
the new transverse close-packed short piles and the new longitudinal close-packed long piles form a continuous n-shaped embankment foot anti-shock structure, wherein the new longitudinal close-packed long piles are the space between two vertical lines below an upper horizontal line in the n-shaped structure and are marked as B, the length of the vertical line in the n-shaped structure and the length of the vertical line in the new transverse close-packed short piles are marked as A, the B of the structure is not shorter than A, and the new longitudinal close-packed long piles and the new transverse close-packed short piles are combined to form a continuous n-shaped structure on a plane and are combined with an existing vertical anti-shock structure to form a lattice-shaped structure on the plane;
the filling in the step three has two modes, namely filling with filler and naturally slushing;
the filler material filled by the filler can be soil material, sand material, stone material, or a mixture of soil and stone, or stone material packed in a net bag, or soil and stone material packed in a woven fabric bag, or precast blocks cast by cement concrete, or concrete;
and if the filler is filled in the third step, the filling top elevation of the filler close to one side of the close-packed piles is not higher than the design top elevation of the close-packed piles.
In addition, in one embodiment, the construction mode adopts underwater operation, and the construction cost can be greatly reduced and the construction period can be shortened by adopting the underwater operation.
In addition, in one embodiment, the new transverse densely-arranged short piles and the new longitudinal densely-arranged long piles adopt densely-arranged wooden piles, the piles made of wood materials are easy to obtain, the pile bodies are light in weight, the processing cost and the inserting and driving cost of the piles are low, and the engineering cost can be greatly reduced under the condition of meeting the use requirement.
In addition, in one embodiment, the distance (B in figure 1) between two adjacent groups of new transverse close-packed short piles is two to ten times of the distance (A in figure 1) between the new longitudinal close-packed long piles and the existing vertical scour prevention structure, and the scour prevention performance of the embankment foot scour prevention structure arranged in the way is better.
In addition, in one embodiment, the filling is adopted to fill the space between the new longitudinal dense-row long pile and the existing vertical anti-impact structure during construction operation, and the structure is more compact and compact after filling by adopting the filling compared with natural scouring.
In addition, in one embodiment, the filling material adopted by the construction filling is a mixture of soil and stone, the mixture is used for filling, the advantages of soil and stone are combined, the cost is lower, the filling has the advantage that the erosion resistance of the cavity part is stronger, and the erosion resistance of the formed embankment foot erosion-resistant structure is better.
In addition, in one embodiment, the new transverse densely-arranged short piles and the new longitudinal densely-arranged long piles are densely-arranged wooden piles, and the new transverse densely-arranged short piles are arranged in a double-row structure.
In the specific embodiment, at first dig existing perpendicular scour protection structure other river (sea) side before the construction the obstacle that hinders the plug-in of position is beaten to new vertical close-packed long pile and new horizontal close-packed stub, like barriers such as building stones, then beat in order from one side of existing perpendicular scour protection structure to one side of the other river one by one new horizontal close-packed short pile, beat in order one by one and establish new vertical close-packed long pile afterwards, make the pile bolck elevation one by one be less than the average elevation between existing perpendicular scour protection structure bolck elevation and the original design scour elevation to reach design pile bolck elevation, accomplish the installation back of pile foundation between new vertical close-packed long pile and the existing perpendicular scour protection structure, build the filler, and lean on one side of new vertical close-packed pile the packing bolck elevation of filler is not higher than the design bolck elevation of new vertical close-packed pile.
The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.
Claims (8)
1. A method for improving the fortification standard of an existing vertical scour prevention structure of a dike foot is characterized by comprising the following steps of:
firstly, construction is carried out in a certain construction operation mode, and obstacles at the piling positions of new transverse close-packed short piles and new longitudinal close-packed long piles are excavated in the construction process;
step two, sequentially driving new transverse densely-arranged short piles and new longitudinal densely-arranged long piles one by one in a preset direction;
filling between the new longitudinal densely-arranged long piles and the existing vertical scour prevention structure;
the construction operation mode in the first step comprises underwater operation and dry land operation after building a water retaining cofferdam;
the preset inserting and driving direction of the new transverse close-packed stub in the second step is the direction extending from one side of the existing vertical scour prevention structure to one side of the external river or the opposite direction;
the new transverse densely-arranged short piles and the new longitudinal densely-arranged long piles adopted in the second step are made of wood, reinforced concrete or plastic steel, such as wood piles, reinforced concrete prefabricated sheet piles, reinforced concrete prefabricated square piles, reinforced concrete prefabricated tubular piles, concrete cast-in-place piles, steel sheet piles, plastic steel sheet piles and the like;
the piles of the new longitudinal close-packed long piles are close to each other and are arranged on the side, which is scoured by the external river (sea), of the existing vertical scour prevention structure;
the new transverse densely-arranged short piles are vertically or nearly vertically arranged between the existing vertical scour prevention structure and the new longitudinal densely-arranged long piles, the pile length is shorter than that of the new longitudinal densely-arranged long piles, and the pile top elevation is flush with or slightly lower than that of the new longitudinal densely-arranged long piles;
the top elevation of the new longitudinal close-packed piles is lower than the average elevation between the top elevation of the existing vertical scour prevention structure and the original designed scour elevation;
the new transverse close-packed short piles and the new longitudinal close-packed long piles form a continuous n-shaped embankment foot anti-impact structure, wherein the distance between two vertical lines below an upper horizontal line in the n-shaped long piles is marked as B, the length of a vertical line in the n-shaped short piles is marked as A, and the B of the structure is not shorter than the A;
the filling in the step three has two modes, namely filling with filler and naturally slushing;
the filler material filled by the filler can be soil material, sand material, stone material, or a mixture of soil and stone, or stone material packed in a net bag, or soil and stone material packed in a woven fabric bag, or precast blocks cast by cement concrete, or concrete;
and if the filler is filled in the third step, the filling top elevation of the filler close to one side of the close-packed piles is not higher than the design top elevation of the close-packed piles.
2. A method for improving the arming standard of an existing vertical scour protection structure of a levee according to claim 1, wherein: the construction mode adopts underwater operation.
3. A method for improving the arming standard of an existing vertical scour protection structure of a levee according to claim 1, wherein: the new transverse densely-arranged short piles and the new longitudinal densely-arranged long piles adopt densely-arranged wood piles.
4. A method for improving the arming standard of an existing vertical scour protection structure of a levee according to claim 1, wherein: the distance between two adjacent groups of new transverse close-packed short piles is two to ten times of the distance between the new longitudinal close-packed long piles and the existing vertical scour prevention structure.
5. A method for improving the arming standard of an existing vertical scour protection structure of a dike according to claim 1, wherein: and filling the space between the new longitudinal dense-row long piles and the existing vertical scour prevention structure by adopting filling materials in construction operation.
6. A method for improving the arming standard of an existing vertical scour protection structure of a levee according to claim 1, wherein: the filling material adopted by the construction filling is a mixture mixed by earth and stones.
7. A method for improving the arming standard of an existing vertical scour protection structure of a levee according to claim 1, wherein: the pile top of the adjacent close-packed piles is free of cementing materials such as cast-in-place concrete or reinforced concrete.
8. A method for improving the fortification standard of an existing vertical scour protection structure of a levee according to claim 3, wherein: the new transverse densely-arranged short piles and the new longitudinal densely-arranged long piles are densely-arranged timber piles, and the new transverse densely-arranged short piles are of a double-row structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210514330.7A CN114960729A (en) | 2022-05-11 | 2022-05-11 | Method for improving fortification standard of existing vertical scour prevention structure of dike foot |
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| CN202210514330.7A CN114960729A (en) | 2022-05-11 | 2022-05-11 | Method for improving fortification standard of existing vertical scour prevention structure of dike foot |
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| CN214783650U (en) * | 2021-06-01 | 2021-11-19 | 上海嘉定水务工程设计有限公司 | River course shore protection structure of high stability |
| CN215518589U (en) * | 2021-03-30 | 2022-01-14 | 上海勘测设计研究院有限公司 | Hanging plate retaining wall structure of high pile cap of cast-in-place pile |
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2022
- 2022-05-11 CN CN202210514330.7A patent/CN114960729A/en active Pending
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| JP2010156192A (en) * | 2008-12-05 | 2010-07-15 | Jfe Steel Corp | Existing harbor quay-wall reinforcing structure and reinforcing method |
| CN202298560U (en) * | 2011-09-20 | 2012-07-04 | 北京正和恒基滨水生态环境治理有限公司 | Wood stake ecological revetment |
| CN103758134A (en) * | 2014-01-24 | 2014-04-30 | 中国建筑股份有限公司 | Combined double-row pile supporting system and construction method thereof |
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