CN115247410B - Device for preventing medium and small earth-rock dams from being overtopped and damaged and transformation method - Google Patents
Device for preventing medium and small earth-rock dams from being overtopped and damaged and transformation method Download PDFInfo
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- CN115247410B CN115247410B CN202111612246.0A CN202111612246A CN115247410B CN 115247410 B CN115247410 B CN 115247410B CN 202111612246 A CN202111612246 A CN 202111612246A CN 115247410 B CN115247410 B CN 115247410B
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- 239000011435 rock Substances 0.000 title claims abstract description 22
- 238000011426 transformation method Methods 0.000 title abstract description 4
- 239000010410 layer Substances 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002344 surface layer Substances 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims description 49
- 239000004575 stone Substances 0.000 claims description 24
- 239000000945 filler Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 230000007306 turnover Effects 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 5
- 238000009420 retrofitting Methods 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000004904 shortening Methods 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000007599 discharging Methods 0.000 description 7
- 239000004567 concrete Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000002407 reforming Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035485 pulse pressure Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 210000004911 serous fluid Anatomy 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/06—Earth-fill dams; Rock-fill dams
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
Abstract
The invention discloses a device for preventing a medium and small earth-rock dam from being overturned and damaged and a transformation method, wherein the device for preventing the medium and small earth-rock dam from being overturned and damaged comprises a groove formed in the top of a dam body, sheet pile walls oppositely arranged at two sides of the groove, and filling layers paved in the groove and in a multi-layer structure, wherein the sheet pile walls and the filling layers are obliquely arranged from the groove at the top of the dam body along one side of the dam body far away from the water level; the flood discharge channel for preventing flood from overflowing is formed by the grooves, the sheet pile walls and the filling layers, the surface layer of the filling layers wraps the sheet pile walls to form the integral side wall and the bottom plate of the flood discharge channel, and the flood discharge channel has the advantages of being rapid in assembly and disassembly and stable in structure, greatly shortening the construction period, effectively avoiding overflowing damage due to large drainage amount, and avoiding dam collapse due to the fact that the filling layers are matched with the sheet pile walls to form the main body of the flood discharge channel.
Description
Technical Field
The invention relates to the technical field of earth-rock dam reconstruction engineering, in particular to a device and a reconstruction method for preventing a medium-small earth-rock dam from being broken by flood-bursting.
Background
In the prior art, the earth-rock dam is a water retaining building which is relatively commonly used in hydraulic engineering and has excellent performance, plays an important role in resisting flood, and is notable that in recent years, extreme weather is more and more caused by global warming, reservoirs and rivers and lakes often encounter out-of-standard flood, the out-of-standard flood is extremely likely to cause the earth-rock dam to overtake, the probability that a medium and small earth-rock dam is overturned is extremely high, the flood overtravel often causes the earth-rock dam to break, huge life and economic property losses are caused for coastal residents and downstream residents, so that the medium and small earth-rock dam needs to be modified urgently, and the occurrence of the fault of the earth-rock dam overtravel is avoided.
The application number is: 202110017351.3 Chinese patent invention discloses an emergency rescue device for preventing the overtopping damage of a dike and a earth dam and a construction method, wherein the device comprises slope protection materials paved along the top surface and downstream slope surfaces of the dike; plastic blind ditches for draining water are arranged between adjacent slope protection materials; two sides of the plastic blind ditch are provided with metal members for anchoring, and the lap joint of the adjacent slope protection materials is provided with a water stopping member for filling gaps. The construction method comprises a preparation stage, a laying and anchoring stage and a hydration forming stage, wherein the concrete canvas is watered and hydrated in advance before flood comes, and the concrete canvas is hardened and formed in a short time after meeting water, so that a structure with certain strength and rigidity is formed, and the embankment is protected from being damaged by flood scouring. However, this kind of prevent dyke and earth dam overtopping destroyed emergent rescue device and construction method get rid of the water leakage that just about overtopped in the dyke through the plastics blind ditch, the displacement is less, can't guarantee to avoid overtopping destroyed phenomenon to take place, and it laminates the protection to low side slope and the top surface of lifting the prevention through the concrete canvas of individual layer, stability is relatively poor, when great flood appears, the phenomenon that the concrete canvas drops simultaneously and leads to collapsing the dam along low side slope and the top surface of lifting the prevention easily appears, and after the top installation plastics blind ditch of dyke, it can't satisfy the traffic requirement of dyke, and on a large scale lays slope protection material can produce high cost, and its effect of getting is disproportionately with the cost of input, the practicality is relatively poor.
Disclosure of Invention
The invention aims to provide a device for preventing a medium-small earth-rock dam from being broken by flood-bursting and a transformation method.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
a device for preventing medium and small earth-rock dam from being broken by flood-bursting comprises a groove formed in the top of a dam body, sheet pile walls oppositely arranged on two sides of the groove and a filling layer which is paved in the groove and has a multi-layer structure, wherein the sheet pile walls and the filling layer are obliquely arranged along one side of the downstream of the dam body from the groove in the top of the dam body.
The grooves, the sheet pile walls and the filling layer together form a flood discharge channel for preventing flood from diffusing, and the surface layer of the filling layer wraps the sheet pile walls to form side walls and a bottom plate of the flood discharge channel.
The sheet pile wall comprises a plurality of groups of precast piles with slots and precast slabs spliced with the precast piles through the slots, wherein the precast piles are spliced with the dam body, and the precast slabs are fixedly connected with the dam body through the precast piles.
The filling layer comprises an inner cement blanket, a prefabricated bottom plate or a grouted stone and a surface cement blanket, wherein the inner cement blanket is paved in a groove between two side sheet pile walls, the prefabricated bottom plate or the grouted stone is built on the inner cement blanket, and the surface cement blanket is paved on the prefabricated bottom plate or the grouted stone and wraps the sheet pile walls formed by the prefabricated piles and the prefabricated plates.
The part of the surface cement blanket wrapping the sheet pile wall is fixedly connected with the upper part of the precast pile through expansion screws.
The dam body be provided with the dam foundation and flip the bank in one side bottom of keeping away from the water level, the dam foundation flip the bank and fill by the stone of starching and form, the dam foundation flip the bank on lay the top layer cement blanket, the dam foundation flip the bank outside insert and be equipped with the slide-resisting stake.
The prefabricated plate is characterized in that one side, close to the filling layer, of the prefabricated plate is provided with at least one supporting column, the supporting column is located between two adjacent prefabricated piles, a filler is filled between the prefabricated plate and the surface cement blanket, and the filler is a mixture of soil, sand and stone to form an energy absorption structure for absorbing water flow pulse power.
The dam body is characterized by further comprising a flap gate for meeting traffic demands of the dam body in a flood season, wherein the flap gate is arranged on the upper parts of the pile plate walls on two sides of the groove and is in overturning connection with the corresponding pile plate walls.
The reconstruction method of the device for preventing the medium and small earth-rock dams from being broken by flood, comprises the following steps:
a. slotting at the top of the dam body, and digging downwards for 0.5-0.8 m;
b. inserting precast piles from two sides of the groove along one side of the dam body far from the water level, wherein the spacing distance between the precast piles is 3-5 m, the pile length of the precast piles is 5-6 m, and the dam entering length is 3.5-4 m;
c. the precast slabs are inserted between precast piles through grooves on the precast piles to form slab pile walls;
d. paving an inner cement blanket between the sheet pile walls at two sides;
e. building a prefabricated bottom plate or stone mortar on the inner cement blanket;
f. paving a surface cement blanket on the built precast bottom plate or the slurry masonry stone and wrapping the pile wall, wherein the part of the surface cement blanket wrapping the pile wall is fixed with the upper part of the precast pile through expansion screws;
g. meanwhile, a dam foundation flip bucket or a stilling pool and a slide-resistant pile are built, and transformation is completed.
And e, filling the filling material consisting of the soil, the sand and stone mixture between two adjacent precast piles, so that the inner surface of the filling material is kept flush with the inner surface of the precast pile.
The plate pile wall upper portion of recess both sides is equipped with turns over the board door, and during non-flood season, turns over the board door of both sides and overturns to the recess inboard, and the concatenation becomes turns over the board bridge and is used for satisfying the traffic requirement of dam body, and during flood season, turns over the board door of both sides and overturns to plate pile wall upper portion, laminates with plate pile wall upper portion and is used for satisfying the flood discharge requirement of dam body.
The beneficial effects of the invention are as follows:
the multi-layer composite plate pile wall has the advantages of being rapid in disassembly and assembly and stable in structure, being capable of greatly shortening the construction period, forming a flood discharge channel together through the grooves, the plate pile wall and the filling layers, being large in drainage quantity, being capable of discharging flood before the flood reaches the top of a dam body, being capable of effectively avoiding the phenomenon of flood damage, being high in strength and good in stability, being capable of avoiding the phenomenon that dam slopes and the top surface of the dam body fall off simultaneously to cause the dam, being provided with a flap gate capable of forming a plate bridge on the upper portion of the plate pile wall, being capable of meeting the traffic requirement of the dam in a non-flood period, being lower in cost generated in the transformation process, being capable of saving 30% -50% of cost compared with the traditional flood discharge channel, and being high in economic benefit.
Drawings
FIG. 1 is a side cross-sectional view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of the sheet pile wall of the present invention mated with a infill layer;
FIG. 3 is a schematic view of the invention in combination with a panel door and a sheet pile wall;
FIG. 4 is a schematic diagram of an energy absorption structure formed by a precast pile and a filler matched with a surface cement blanket according to the invention.
In the figure: 1. a dam body; 2. precast piles; 3. a prefabricated plate; 4. an inner cement blanket; 5. prefabricating a base plate or a masonry; 6. a surface cement blanket; 7. an expansion screw; 8. a dam foot flip bucket; 9. a slide-resistant pile; 10. a flap door; 11. a support column; 12. and (5) filling.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings,
the invention discloses a device for preventing a medium and small earth-rock dam from being broken by flood, which comprises a groove formed in the top of a dam body 1, sheet pile walls oppositely arranged on two sides of the groove and a filling layer paved in the groove and provided with a multi-layer structure, wherein the sheet pile walls and the filling layer are obliquely arranged along the downstream side of the dam body 1 from the groove in the top of the dam body 1, the groove, the sheet pile walls and the filling layer jointly form a flood discharging channel for preventing flood from overflowing, and the sheet pile walls are wrapped on the surface layer of the filling layer to form side walls and a bottom plate of the flood discharging channel.
The sheet pile wall consists of a plurality of groups of precast piles 2 with slots and precast slabs 3 spliced with the precast piles 2 through the slots, wherein the precast piles 2 are spliced with the dam body 1, the precast slabs 3 are fixedly connected with the dam body 1 through the precast piles 2, the lower parts of the precast piles 2 are conical, so that the precast piles 2 are conveniently inserted into the dam body 1, and the cross section of the sheet pile wall and the filling layer is shown in figure 2.
The filling layer comprises an inner cement blanket 4, a prefabricated bottom plate or a slurry stone 5 and a surface cement blanket 6, wherein the inner cement blanket 4 is paved in a groove between two side sheet pile walls, the prefabricated bottom plate or the slurry stone 5 is paved on the inner cement blanket 4, the surface cement blanket 6 is paved on the prefabricated bottom plate or the slurry stone 5 and wraps the sheet pile walls formed by the prefabricated piles 2 and the prefabricated plates 3, the thickness of the cement blanket is 1-2cm, the cement blanket can be hardened after being watered, and the inner cement blanket 4, the prefabricated bottom plate or the slurry stone 5 and the surface cement blanket 6 form a filling layer with a three-layer structure, so that the integral strength and the stability of the device can be ensured.
The part of the surface cement blanket 6 wrapping the sheet pile wall is fixedly connected with the upper part of the precast pile 2 through the expansion screw 7, wherein the expansion screw 7 is used for positioning the cement blanket and preventing the cement blanket from falling off from the sheet pile wall.
The dam body 1 is provided with the dam foot flip bucket 8 in one side bottom of keeping away from the water level, and the dam foot flip bucket 8 is filled by the stone of serous fluid and forms, and the upper strata cement blanket 6 has been laid on the dam foot flip bucket 8, and the outside of dam foot flip bucket 8 is inserted and is equipped with and hinders slide pile 9, and wherein, the dam foot flip bucket 8 can cushion along the discharged rivers of flood discharge canal, can adopt the stilling pool that has the same function to replace the dam foot flip bucket 8, and the length of dam foot flip bucket 8 is 9-12m, security when can guaranteeing the rivers buffering.
The dam body 1 is characterized by further comprising a plate turnover door 10 for meeting traffic demands of the dam body 1 in a non-flood season, wherein the plate turnover door 10 is arranged on the upper parts of pile walls on two sides of the groove and is connected with the corresponding pile walls in a turnover mode, the plate turnover doors 10 arranged on the upper parts of the pile walls on two sides of the groove are turned to the inner sides of the groove when the dam body 1 is in the non-flood season, the plate turnover doors 10 on two sides are spliced into a plate turnover bridge for meeting traffic demands of the dam body 1, and the plate turnover doors 10 on two sides are turned to the upper parts of the pile walls when the dam body is in the flood season and are attached to the upper parts of the pile walls for meeting flood discharge demands of the dam body 1.
In the flood prevention period, when the flap door 10 for meeting traffic needs is installed, the precast pile 2 at the middle position of the top of the plate body can be disassembled, so that the installation needs of the flap door 10 are met, and the matching schematic diagram of the flap door 10 and the sheet pile wall is shown in fig. 3.
The reconstruction method of the device for preventing the medium and small earth-rock dams from being broken by flood, comprises the following steps:
a. slotting at the top of the dam body 1, and digging downwards for 0.5-0.8 m;
b. inserting precast piles 2 from two sides of the groove along one side of the dam body 1 far from the water level, wherein the interval distance between the precast piles 2 is 3-5 m, the pile length of the precast piles 2 is 5-6 m, the dam entering length is 3.5-4 m, and the length is 1.5-2 m outside;
c. the precast slabs 3 are inserted between the precast piles 2 through grooves on the precast piles 2 to form a slab pile wall;
d. paving an inner cement blanket 4 between the sheet pile walls at two sides;
e. a prefabricated base plate or a stone 5 is laid on the inner cement blanket 4;
f. paving a surface cement blanket 6 on the built precast floor or the grouted masonry 5 and wrapping a sheet pile wall, wherein the part of the surface cement blanket 6 wrapping the sheet pile wall is fixed with the upper part of the precast pile 2 through expansion screws 7;
g. meanwhile, a dam foundation flip bucket 8 or a stilling pool and a slide-resistant pile 9 are built, and transformation is completed.
Further, at least one supporting column 11 is arranged on one side of the precast slab 3 close to the filling layer, two supporting columns 11 are arranged between two adjacent precast piles 2 by way of example, the two supporting columns 11 are uniformly distributed between the two adjacent precast piles 2, the filler 12 is filled between the precast slab 3 and the precast pile 6, the filler 12 is a mixture of soil, sand and sand, the precast piles 2 with different strength and density and the filler 12 are matched with the precast pile 6 wrapping the sheet pile wall to form an energy absorption structure for absorbing water flow pulse power, so as to absorb the pulse pressure generated when water flows in the flood discharge channel, the anti-scouring performance of the precast pile 6 is improved, namely, the strength and the density of the precast pile 6 are different at the position where the filler 12 is correspondingly arranged and the precast pile 2 are correspondingly arranged, the filler 12 and the precast pile 2 are staggered, the pulse pressure generated by the water flow is absorbed by the energy absorption structure with the staggered structure, the energy absorption performance of the energy absorption structure is superior to that the energy absorption structure with the same strength and the density at all positions, and the precast pile 2 and the filler 12 are matched with the precast pile 6 to form the energy absorption structure of the precast pile 6 as shown in a schematic diagram 4.
Wherein, other objects with the same function such as supporting blocks, supporting bodies and the like can be used for replacing the supporting columns 11.
Wherein, when the filler 12 is arranged: and e, filling the filling material consisting of the soil, the sand and the sand-stone mixture between two adjacent precast piles, so that the inner surface of the filling material is kept level with the inner surface of the precast pile.
For example, when a dam body 1 with the dam height of 30 meters is reformed, 23 groups of precast piles 2 are needed to be inserted and beaten on the dam body 1, the construction of the sheet pile wall can be completed within 2-3 days, the construction of the traditional flood discharge channel needs a construction time of a plurality of months, and the reforming method disclosed by the scheme only needs a reforming time of one month, so that the reforming efficiency is greatly improved, and emergency construction can be carried out in the flood season.
Working principle:
the method comprises the steps of forming a dam top flood discharge port at the top of a dam body 1 relative to check flood level, arranging sheet pile walls formed by precast piles 2 and precast slabs 3 along the two sides of the dam top groove and a downstream slope of the dam body 1, ensuring the structural stability of the dam, facilitating disassembly and assembly, shortening the construction period, paving an inner cement blanket 4 at the bottom between the sheet pile walls at the two sides, building a precast bottom plate or a mortar stone 5 at the upper part of the dam after watering and hardening, paving a surface cement blanket 6 at the built precast bottom plate or the mortar stone 5, enabling the surface cement blanket 6 to wrap the sheet pile walls at the two sides to form a flood discharge channel, fixing the surface cement blanket 6 on the sheet pile walls through expansion screws 7, ensuring the overall stability and the strength of the flood discharge channel through filling layers of a multilayer structure, meeting the high-flow water flow discharge, further meeting the flood discharge requirement, installing a flap gate 10 at the sheet pile parts at the two sides, forming a flap bridge to meet the requirement of the dam body 1 during a non-flood period, and arranging a support column 11 and a support column 12 at the inner side of the precast slab 3, and further enabling the surface cement blanket 6 to wrap the sheet pile 6 to form a flood discharge channel with the same pressure and energy absorption capacity as that the whole water flow density of the flood discharge channel has different strength.
The invention has the advantages that the plate pile wall formed by a plurality of groups of precast piles with slots and precast plates spliced with the precast piles has the advantages of quick assembly and disassembly and stable structure, the construction period can be greatly shortened, the flood discharging channel is formed by the grooves, the plate pile walls and the filling layers together, the water discharge amount is large, the flood can be discharged before reaching the top of the dam body, the flood discharging channel body can be effectively avoided from being broken by the filling layers with the multi-layer structure, the main body of the flood discharging channel is formed by the filling layers matched with the plate pile walls, the strength is high, the stability is good, the phenomenon that the dam slope and the top surface of the dam body fall off simultaneously to cause the dam collapse is avoided, the upper part of the plate pile walls is provided with the turnover plate door capable of forming a plate bridge, the traffic requirement of the dam in the non-flood period can be met, and compared with the traditional flood discharging channel, the cost generated in the transformation process can be saved by 30% -50%, and the economic benefit is high.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (7)
1. The device for preventing the medium and small earth and rockfill dam from being broken by flood is characterized by comprising a groove formed in the top of a dam body (1), sheet pile walls arranged on two sides of the groove in an opposite mode and a filling layer paved in the groove and provided with a multi-layer structure, wherein the sheet pile walls and the filling layer are obliquely arranged along one side of the downstream of the dam body (1) from the groove in the top of the dam body (1);
the groove, the sheet pile wall and the filling layer together form a flood discharge channel for preventing flood from diffusing, and the surface layer of the filling layer wraps the sheet pile wall to form a side wall and a bottom plate of the flood discharge channel;
the sheet pile wall consists of a plurality of groups of precast piles (2) with slots and precast plates (3) spliced with the precast piles (2) through the slots, wherein the precast piles (2) are spliced with the dam body (1), and the precast plates (3) are fixedly connected with the dam body (1) through the precast piles (2);
the filling layer comprises an inner cement blanket (4), a prefabricated bottom plate or a grouted stone (5) and a surface cement blanket (6), wherein the inner cement blanket (4) is paved in a groove between two side sheet pile walls, the prefabricated bottom plate or the grouted stone (5) is built on the inner cement blanket (4), and the surface cement blanket (6) is paved on the prefabricated bottom plate or the grouted stone (5) and wraps the sheet pile walls formed by the prefabricated piles (2) and the prefabricated plates (3);
the part of the surface cement blanket (6) wrapping the sheet pile wall is fixedly connected with the upper part of the precast pile (2) through an expansion screw (7).
2. The device for preventing the flood peak damage of the medium and small earth-rock dams according to claim 1, wherein a dam foot flip bucket (8) is arranged at the bottom of one side, far away from the water level, of the dam body (1), the dam foot flip bucket (8) is filled with slurry stones, a surface cement blanket (6) is paved on the dam foot flip bucket (8), and a slide-resisting pile (9) is inserted at the outer side of the dam foot flip bucket (8).
3. A device for preventing flood damage to a medium or small earth-rock dam according to claim 1, wherein at least one supporting column (11) is arranged on the side of the precast slab (3) close to the filling layer, the supporting column (11) is located between two adjacent precast piles (2), a filler (12) is filled between the precast slab (3) and the surface cement blanket (6), and the filler (12) is a mixture of soil, sand and stone to form an energy absorbing structure for absorbing water flow pulse power.
4. The device for preventing the flood peak damage of the medium and small earth-rock dams according to claim 1, further comprising a flap gate (10) for meeting the traffic demand of the dam body (1) in the non-flood period, wherein the flap gate (10) is arranged on the upper parts of the pile plate walls at two sides of the groove and is connected with the corresponding pile plate walls in a turnover manner.
5. A retrofitting method of an apparatus for preventing flood damage of a medium and small earth-rock dam according to any one of claims 1 to 4, comprising the steps of:
a. slotting at the top of the dam body (1), and digging downwards for 0.5-0.8 m;
b. inserting precast piles (2) from two sides of the groove along one side of the dam body (1) far away from the water level, wherein the spacing distance between the precast piles (2) is 3-5 m, the pile length of the precast piles (2) is 5-6 m, the dam entering length is 3.5-4 m, and the length is 1.5-2 m outside;
c. the precast slabs (3) are inserted between the precast piles (2) through grooves on the precast piles (2) to form slab pile walls;
d. paving an inner cement blanket (4) between the sheet pile walls at two sides;
e. a prefabricated bottom plate or a stone (5) is built on the inner cement blanket (4);
f. paving a surface cement blanket (6) on the built precast floor or the built stone (5) and wrapping a sheet pile wall, wherein the part of the surface cement blanket (6) wrapping the sheet pile wall is fixed with the upper part of the precast pile (2) through expansion screws (7);
g. meanwhile, a dam foundation flip bucket (8) or a stilling pool and a slide-resistant pile (9) are built, and transformation is completed.
6. A retrofitting method of a device for preventing flood damage of a medium and small earth-rock dam according to claim 5, further comprising a filling step of filling a filler (12) consisting of a mixture of soil, sand and sand between two adjacent precast piles (2) so that the inner surface of the filler (12) is flush with the inner surfaces of the precast piles (2) after said step e.
7. The improvement method of the device for preventing the flood damage of the medium and small earth and rockfill dams according to claim 5, wherein the plate pile walls on two sides of the groove are provided with the flap gates (10), the flap gates (10) on two sides are turned to the inner sides of the groove during a flood season, the flap bridges are spliced to meet the traffic requirements of the dam body (1), and the flap gates (10) on two sides are turned to the upper parts of the plate pile walls and are attached to the upper parts of the plate pile walls during the flood season to meet the flood discharge requirements of the dam body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111612246.0A CN115247410B (en) | 2021-12-27 | 2021-12-27 | Device for preventing medium and small earth-rock dams from being overtopped and damaged and transformation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111612246.0A CN115247410B (en) | 2021-12-27 | 2021-12-27 | Device for preventing medium and small earth-rock dams from being overtopped and damaged and transformation method |
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| Publication Number | Publication Date |
|---|---|
| CN115247410A CN115247410A (en) | 2022-10-28 |
| CN115247410B true CN115247410B (en) | 2024-02-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003020631A (en) * | 2001-07-06 | 2003-01-24 | Shimizu Corp | Impervious structure and construction method for fill dam |
| CN2818548Y (en) * | 2005-09-06 | 2006-09-20 | 中国水电顾问集团华东勘测设计研究院 | Spillway of stone dam body with reinforced concrete panel |
| CN102409640A (en) * | 2011-09-02 | 2012-04-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Passive-drainage emergency rescue method in case of earth-rock dam break |
| CN108978585A (en) * | 2018-08-17 | 2018-12-11 | 合肥五凡建筑工程有限公司 | A kind of flood control dam of protection against erosion |
| CN110158546A (en) * | 2019-04-09 | 2019-08-23 | 中国水利水电科学研究院 | For earth and rockfill dam, the emergency safeguard structure and safeguard procedures of native bank of stone downstream slope |
| CN210975741U (en) * | 2019-11-02 | 2020-07-10 | 李晓燕 | Reinforced structure of earth and rockfill dam |
| CN112813920A (en) * | 2021-01-07 | 2021-05-18 | 河海大学 | Emergency rescue device for preventing overtopping damage of dike and earth dam and construction method |
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2021
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| JP2003020631A (en) * | 2001-07-06 | 2003-01-24 | Shimizu Corp | Impervious structure and construction method for fill dam |
| CN2818548Y (en) * | 2005-09-06 | 2006-09-20 | 中国水电顾问集团华东勘测设计研究院 | Spillway of stone dam body with reinforced concrete panel |
| CN102409640A (en) * | 2011-09-02 | 2012-04-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Passive-drainage emergency rescue method in case of earth-rock dam break |
| CN108978585A (en) * | 2018-08-17 | 2018-12-11 | 合肥五凡建筑工程有限公司 | A kind of flood control dam of protection against erosion |
| CN110158546A (en) * | 2019-04-09 | 2019-08-23 | 中国水利水电科学研究院 | For earth and rockfill dam, the emergency safeguard structure and safeguard procedures of native bank of stone downstream slope |
| CN210975741U (en) * | 2019-11-02 | 2020-07-10 | 李晓燕 | Reinforced structure of earth and rockfill dam |
| CN112813920A (en) * | 2021-01-07 | 2021-05-18 | 河海大学 | Emergency rescue device for preventing overtopping damage of dike and earth dam and construction method |
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| CN115247410A (en) | 2022-10-28 |
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