CN113494067A - Anti-impact protection structure capable of being rapidly constructed and rapid construction method thereof - Google Patents
Anti-impact protection structure capable of being rapidly constructed and rapid construction method thereof Download PDFInfo
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- CN113494067A CN113494067A CN202010254765.3A CN202010254765A CN113494067A CN 113494067 A CN113494067 A CN 113494067A CN 202010254765 A CN202010254765 A CN 202010254765A CN 113494067 A CN113494067 A CN 113494067A
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- protective layer
- cofferdam
- steel pipe
- connecting steel
- covering layer
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention provides an anti-impact protection structure capable of being quickly constructed and a quick construction method thereof. The invention has the function of self-repairing after the covering layer is deformed, and has the advantages of simple processing method, short construction time and small engineering quantity.
Description
Technical Field
The invention relates to the technical field of water conservancy and hydropower engineering, in particular to an anti-impact protection structure capable of being rapidly constructed and a construction method thereof.
Background
The earth-rock overflow cofferdam is a relatively special cofferdam type in water conservancy and hydropower construction diversion buildings, when the earth-rock overflow cofferdam top overflows, because the difference in height between its weir crest and weir foot reaches tens of meters or even more, the potential energy that leads to rivers is too big, consequently, its weir foot and overburden not only will bear the rivers striking for a long time when rivers let off, still bear rivers and erode along the big velocity of flow that the domatic production of letting off of cofferdam, cause weir foot and overburden to draw and brush easily and arouse the domatic destruction of cofferdam, the even whole destruction of cofferdam. The traditional method for solving the problems is to arrange anchor bar bundles or cast-in-place piles on the cofferdam weir feet and carry out 'foot locking' treatment on the cofferdam weir feet; or the covering layer is dug to bedrock, concrete blocks are poured on the cofferdam feet, and the cofferdam slope and the excavated slope are protected, but the traditional method has the following defects: 1. the traditional method has no self-repairing function after the covering layer is deformed; 2. the cofferdam construction is generally carried out in a dry season, the construction time is limited, the time required by the traditional treatment method is long, and the construction period is short; 3. the traditional treatment method has large engineering quantity and large investment.
Disclosure of Invention
The invention aims to provide an anti-impact protection structure capable of being constructed quickly and a quick construction method thereof, which have the function of self-repairing after a covering layer is deformed, and have the advantages of simple treatment method, short construction time and small engineering quantity.
According to the first aspect of the invention, the following technical scheme is adopted:
the utility model provides a but quick construction's anti dashing protective structure which characterized in that: the cofferdam comprises a plurality of protective layer units, wherein the protective layer units are arranged along the width direction of the cofferdam, the protective layer units are local rigid and overall flexible structures formed by sequentially connecting a plurality of rigid plates through flexible connecting structures, the rigid plates and the covering layers, which are close to the feet of the cofferdam, of the protective layer units are fixedly connected through a plurality of connecting steel pipes, and the other ends of the protective layer units are free ends.
Further: the rigid plate is a reinforced concrete plate, and the steel bars of the rigid plate close to the leg of the cofferdam weir are connected with the connecting steel pipe.
Further: the flexible connection structure adopts a chain, and a lock catch used for connecting the chain is embedded in the surface of the connecting chain of the rigid plate.
Further: the connecting steel pipe top side wall is provided with a plurality of holes in a penetrating mode, transverse steel bars and longitudinal steel bars of a reinforced concrete slab penetrate through the holes, the transverse steel bars and the longitudinal steel bars are bound and fixed with the connecting pipes, and the transverse steel bars and the longitudinal steel bars are connected with a plurality of connecting steel connecting pipes to form the connecting pipe.
Further: the bottom of the connecting steel pipe is of a sharp-angled structure.
Further: the protective layer structure formed by the protective layer units covers a covering layer area needing to be protected, close to the weir foot, at the downstream of the cofferdam;
when the flow of the river channel is greater than the designed flow of the cofferdam, the water flow is discharged from the top of the cofferdam, the water flow is discharged onto the rigid plate of the protective layer structure along the slope surface of the cofferdam, and a friction force is generated between a connecting steel pipe in the rigid plate close to the feet of the cofferdam and the soil layer of the covering layer, so that the protective layer structure is integrally attached to the covering layer, and the covering layer is protected from being directly washed by the water flow;
when water flow continues to flow along the protective layer structure, friction force exists between the surface of the protective layer structure and the water flow, the water flow is buffered, and the formation time of a covering layer pit is retarded;
when the covering layer is frequently washed by water flow to form a pit-washing terrain, the protective layer structure deforms to adapt to the pit-washing terrain and is tightly attached to the surface of the covering layer gully terrain, so that the pit washing is prevented from being further enlarged;
the deformation of the protective layer structure corresponding to the actual shape of the punched pit of the covering layer is integral deformation or local deformation, the local deformation is that the angle of a single protective layer unit is adjusted according to the action of the flexible connecting structure, the gravity of the rigid plate and water flow, and the protective layer unit forms bending deformation; the integral deformation is a combined deformation of a plurality of protective layer units.
According to the second aspect of the invention, the following technical scheme is adopted:
a rapid construction method of an anti-impact protection structure is characterized by comprising the following steps:
the method comprises the following steps of preparing a connecting steel pipe before construction, cutting one end of the connecting steel pipe into a sharp corner by a cutting machine, drilling a plurality of holes in the side wall of the other end of the connecting steel pipe in a penetrating manner, wherein the axial section of the connecting steel pipe is cross-shaped, and the size of the holes meets the requirement that selected steel bars can penetrate through the holes;
the construction method comprises the following steps:
s1: carrying out row spacing on the used connecting steel pipes, and pressing the connecting steel pipes into a covering layer at a weir foot at the downstream side of the cofferdam by using a backhoe bucket;
s2: after the connecting steel pipe is pressed into the covering layer, longitudinal steel bars and transverse steel bars of the cast-in-place concrete slab are inserted into the holes which are pre-distributed at one end of the connecting steel pipe, and are bound and fixed with the connecting steel pipe;
s3: on the covering layer, according to the size of the designed rigid plate, the distance between adjacent protective layer units and the length of the chain, vertical moulding and concrete pouring of each concrete plate are carried out, and a lock catch is pre-buried at the connection position of the chain;
s4: after the cast-in-place concrete plates reach certain strength, the cast-in-place concrete plates are connected through chains to form an integral structure, and then the construction of the anti-impact protection structure is completed.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention has the function of self-repairing after the deformation of the covering layer, the protective layer structure has local rigidity and integral flexibility, the stress of each plate can be uniformly distributed, the local impact on the covering layer is reduced, simultaneously, the integral structure can change along with the change of the pit-punching terrain of the covering layer, the rigid plate is firmly attached to the surface of the covering layer, the buffer effect is realized on the water flow, the pit-punching forming time of the covering layer is retarded, and the feet of the cofferdam are damaged by scouring.
2. The invention has no complex working procedures of pore forming, wall protection and the like, utilizes a cutting machine to cut the connecting steel pipe, presses the connecting steel pipe into the covering layer, manufactures the rigid plates according to a certain interval, and finally links each rigid plate by a chain.
Drawings
FIG. 1 is a schematic view of the invention in cooperation with a weir foot coating before the weir foot is scoured;
FIG. 2 is a schematic view of the invention in cooperation with a weir foot coating after the weir foot has been scoured;
FIG. 3 is a schematic view of the rigid plate connection of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a schematic view showing a connection structure of a rigid plate and a connecting steel pipe according to the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
As shown in fig. 1-5, the anti-impact protection structure capable of being rapidly constructed provided by the present invention comprises a protection layer unit 1 which is connected together from front to back by a plurality of rigid plates 2 through flexible connection structures, is locally rigid and is flexible as a whole and has a certain width, the end of the protection layer unit 1 close to the cofferdam is fixed, the end far away from the cofferdam is a free end, and a plurality of protection layer units 1 are arranged along the width direction of the cofferdam to form a protection layer structure which is locally rigid and is flexible as a whole and has a larger degree of freedom between the strips, and the protection layer structure is covered on a covering layer 100 at the downstream of the cofferdam to protect the covering layer 100. The rigid plate 2 is a generally rectangular plate, the width of the protective layer unit 1 depends on the length of the rigid plate 2, and the length of the rigid plate 2 is greater than the width thereof.
The flexible connection structure may be a chain 3, and the rigid plates 2 may be adjusted at any angle and direction relative to the adjacent rigid plates, thus. Once the local pit 101 appears when the part of the weir foot covering layer 100 is washed away, all the rigid plates 2 at the part can automatically and timely adjust the angle to be attached and protected to the covering layer (as shown in fig. 2).
The rigid plate 2 can be made of reinforced concrete or steel plates, has a certain weight, is not easy to crack and shift by strong impact force of water flow, and can adjust the angle in time by means of gravity when the bottom foundation changes. The rigid plate 2 of the reinforced concrete structure is cast and constructed according to the designed size on site.
The rigid plate 2 is preferably a reinforced concrete structure. The reinforcing mesh of the cast-in-place concrete plate of the protective layer unit 1 near the end of the cofferdam 200 is connected with a plurality of connection steel pipes 4 inserted into the cover layer 100, and after the concrete is poured, the connection steel pipes 4 are integrated with the cast-in-place concrete plate to fix the end of the protective layer unit 1 near the cofferdam 200.
The bottom of connecting steel pipe 4 is the closed angle structure, and the overburden of being convenient for quick construction can directly impressing, has frictional force between connecting steel pipe 4 and the overburden soil layer, when flexible protective layer structure receives rivers to erode, can not be washed away by the powerful impulsive force of rivers. Meanwhile, due to the friction force of water flow on the rigid plate, the rigid plate 2 is tightly pressed on the covering layer 100, and the plurality of protective layer units 1 are contoured and tightly attached to the covering layer 100 at the downstream of the cofferdam, so that the covering layer 100 is prevented from being damaged by scouring, and the feet of the weir are protected.
This side that cast-in-place concrete board 2 connects chain 3 is equipped with hasp 5, and chain 3 and 5 looks locks of hasp, the material of chain and hasp can be the stainless steel, and the inside rigidity board of protective layer simplex structure 1 links in proper order mutually through the chain, and protective layer simplex structure 1 self and protective layer structure are whole can both produce the deformation adaptation and dash the hole topography, and the change that the adaptation overburden dashes the hole topography is hugged closely towards the hole surface, prevents to dash further expansion in hole and threaten cofferdam safety.
The side wall of the top of the connecting steel pipe 4 is provided with a plurality of holes 6 in a penetrating manner, transverse steel bars 7 and longitudinal steel bars 8 which are connected with a cast-in-place concrete slab steel bar mesh are arranged in the holes 6 in a penetrating manner, the transverse steel bars 7 and the longitudinal steel bars 8 are bound and fixed with the connecting steel pipe 4, the transverse steel bars 7 and the longitudinal steel bars 8 are connected with a plurality of connecting steel pipes 4, and the transverse and longitudinal steel bar mesh layers play a supporting role in the flexible plate layer, so that the flexible plate layer can be effectively prevented from being broken due to water flow scouring.
When the flow of the river channel is greater than the designed flow of the cofferdam, the water flow is discharged from the top of the cofferdam, the water flow is discharged onto the rigid plate 2 of the protective layer structure along the slope surface of the cofferdam, and a friction force is formed between a connecting steel pipe in the rigid plate close to the foot of the cofferdam and a covering layer soil layer, so that the protective layer structure is integrally attached to the covering layer 100, the covering layer 100 is protected from being directly washed by the water flow, and the potential energy of the water flow is reduced;
when water flows continuously along the protective layer structure, friction force exists between the surface of the protective layer structure and the water flow, the water flow is buffered, and the pit-flushing forming time of the covering layer is shortened.
When the covering layer 100 is frequently washed by water flow to form a pit-washing terrain, the protective layer structure deforms to adapt to the pit-washing terrain and is tightly attached to the surface of the covering layer gully terrain, so that the pit washing is effectively prevented from being further enlarged.
The protective layer structure should be wholly or locally deformed in response to deformation of the cover layer by the actual shape of the punched pits 101. The angle of the protective layer unit 1 which is locally deformed into a single strip is adjusted according to the action of the flexible connecting structure, the gravity of the rigid plate and water flow, and the protective layer unit is bent and deformed to correspond to relatively scattered pits formed by scouring. The overall deformation is a joint deformation of a plurality of protective layer units 1. The local deformation is that solitary protective layer unit 1 is according to flexible connection structure and rigid plate gravity and rivers effect and angle of adjustment, and the protective layer unit forms bending deformation, and between strip, protective layer unit 1 relies on its one end to be the stiff end, and the other end is the free end, and uses bigger degree of freedom profile deformation, forms the multi-dimensional bending of protective layer structure, hugs closely overburden gully topography surface, and the big hole that the reply erodees and form.
The anti-impact protective structure capable of being rapidly constructed is characterized in that a connecting steel pipe is prepared before construction:
adopt the cutting machine to cut the one end of connecting steel pipe 4 into the closed angle, utilize welding equipment or other drilling equipment to link up at connecting steel pipe other end lateral wall and bore and establish a plurality of holes 6, axial cross-section is cross, and the reinforcing bar that the hole size satisfied chooseing for use can just pass can.
Before construction, a bulldozer or an excavator is adopted to level a range to be protected, and large stones, vegetation and garbage in a field are removed.
The construction steps of the impact-resistant protective structure capable of being quickly constructed comprise:
s1: the connecting steel pipes 4 used are pitched, and the connecting steel pipes 4 are pressed into the covering layer 100 at the weir leg on the downstream side of the cofferdam by a backhoe bucket.
S2: after the connecting steel pipe 4 is pressed into the covering layer 100, longitudinal steel bars 7 and transverse steel bars 8 of a cast-in-place concrete slab are inserted into the holes 6 which are pre-distributed at one end, and are bound and fixed with the connecting steel pipe 4.
S3: on the covering layer 100, the vertical mould and concrete pouring of each concrete slab are carried out according to the designed size of the rigid plate, the distance between adjacent protective layer units and the length of the chain, and the lock catches 5 are pre-embedded at the chain joints.
S4: after the cast-in-place concrete plates reach certain strength, the cast-in-place concrete plates are connected through chains to form an integral structure, and then the construction of the anti-impact protection structure is completed.
The above embodiment is merely a preferred embodiment of the present invention, and those skilled in the art will understand that modifications or substitutions of technical solutions or parameters in the embodiment can be made without departing from the principle and essence of the present invention, and all of them shall be covered by the protection scope of the present invention.
Claims (7)
1. The utility model provides a but quick construction's anti dashing protective structure which characterized in that: the cofferdam comprises a plurality of protective layer units, wherein the protective layer units are arranged along the width direction of the cofferdam, the protective layer units are local rigid and overall flexible structures formed by sequentially connecting a plurality of rigid plates through flexible connecting structures, the rigid plates and the covering layers, which are close to the feet of the cofferdam, of the protective layer units are fixedly connected through a plurality of connecting steel pipes, and the other ends of the protective layer units are free ends.
2. The impact-resistant protective structure capable of being rapidly constructed according to claim 1, wherein: the rigid plate is a reinforced concrete plate, and the steel bars of the rigid plate close to the leg of the cofferdam weir are connected with the connecting steel pipe.
3. The impact-resistant protective structure capable of being rapidly constructed according to claim 1, wherein: the flexible connection structure adopts a chain, and a lock catch used for connecting the chain is embedded in the surface of the connecting chain of the rigid plate.
4. A rapid-construct impact-resistant protective structure as claimed in claim 2, wherein: the connecting steel pipe top side wall is provided with a plurality of holes in a penetrating mode, transverse steel bars and longitudinal steel bars of a reinforced concrete slab penetrate through the holes, the transverse steel bars and the longitudinal steel bars are bound and fixed with the connecting pipes, and the transverse steel bars and the longitudinal steel bars are connected with a plurality of connecting steel connecting pipes to form the connecting pipe.
5. The impact-resistant protective structure capable of being rapidly constructed according to claim 1, wherein: the bottom of the connecting steel pipe is of a sharp-angled structure.
6. The impact-resistant protective structure capable of being rapidly constructed according to claim 1, wherein: the protective layer structure formed by the protective layer units covers a covering layer area needing to be protected, close to the weir foot, at the downstream of the cofferdam;
when the flow of the river channel is greater than the designed flow of the cofferdam, the water flow is discharged from the top of the cofferdam, the water flow is discharged onto the rigid plate of the protective layer structure along the slope surface of the cofferdam, and a friction force is generated between a connecting steel pipe in the rigid plate close to the feet of the cofferdam and the soil layer of the covering layer, so that the protective layer structure is integrally attached to the covering layer, and the covering layer is protected from being directly washed by the water flow;
when water flow continues to flow along the protective layer structure, friction force exists between the surface of the protective layer structure and the water flow, the water flow is buffered, and the formation time of a covering layer pit is retarded;
when the covering layer is frequently washed by water flow to form a pit-washing terrain, the protective layer structure deforms to adapt to the pit-washing terrain and is tightly attached to the surface of the covering layer gully terrain, so that the pit washing is prevented from being further enlarged;
the deformation of the protective layer structure corresponding to the actual shape of the punched pit of the covering layer is integral deformation or local deformation, the local deformation is that the angle of a single protective layer unit is adjusted according to the action of the flexible connecting structure, the gravity of the rigid plate and water flow, and the protective layer unit forms bending deformation; the integral deformation is a combined deformation of a plurality of protective layer units.
7. A rapid construction method of an anti-impact protection structure is characterized by comprising the following steps:
the method comprises the following steps of preparing a connecting steel pipe before construction, cutting one end of the connecting steel pipe into a sharp corner by a cutting machine, drilling a plurality of holes in the side wall of the other end of the connecting steel pipe in a penetrating manner, wherein the axial section of the connecting steel pipe is cross-shaped, and the size of the holes meets the requirement that selected steel bars can penetrate through the holes;
the construction method comprises the following steps:
s1: carrying out row spacing on the used connecting steel pipes, and pressing the connecting steel pipes into a covering layer at a weir foot at the downstream side of the cofferdam by using a backhoe bucket;
s2: after the connecting steel pipe is pressed into the covering layer, longitudinal steel bars and transverse steel bars of the cast-in-place concrete slab are inserted into the holes which are pre-distributed at one end of the connecting steel pipe, and are bound and fixed with the connecting steel pipe;
s3: on the covering layer, according to the size of the designed rigid plate, the distance between adjacent protective layer units and the length of the chain, vertical moulding and concrete pouring of each concrete plate are carried out, and a lock catch is pre-buried at the connection position of the chain;
s4: after the cast-in-place concrete plates reach certain strength, the cast-in-place concrete plates are connected through chains to form an integral structure, and then the construction of the anti-impact protection structure is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010254765.3A CN113494067A (en) | 2020-04-02 | 2020-04-02 | Anti-impact protection structure capable of being rapidly constructed and rapid construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010254765.3A CN113494067A (en) | 2020-04-02 | 2020-04-02 | Anti-impact protection structure capable of being rapidly constructed and rapid construction method thereof |
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| CN212506156U (en) * | 2020-04-02 | 2021-02-09 | 中国电建集团华东勘测设计研究院有限公司 | Anti-impact protection structure capable of being constructed quickly |
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| JPH07317149A (en) * | 1994-05-24 | 1995-12-05 | Takenaka Komuten Co Ltd | Execution method of reinforced concrete column and beam frame |
| JP2002146749A (en) * | 2000-11-08 | 2002-05-22 | Momose Hideko | Coupling block and block-coupled body for slope protection |
| CN2725356Y (en) * | 2004-02-19 | 2005-09-14 | 北京中水科海利工程技术有限公司 | Flexible bank protecting interconnecting body |
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Application publication date: 20211012 |