CN219450782U - Water retaining cofferdam structure for hydraulic engineering construction - Google Patents

Abstract

The utility model relates to a water retaining cofferdam structure for hydraulic engineering construction, which comprises a weir body, wherein the weir body comprises at least two pile walls, each pile wall comprises a plurality of reinforcing piles fixedly arranged in a river channel, adjacent reinforcing piles are fixedly connected through connecting pieces, a filling layer is arranged between the adjacent pile walls, and a waterproof layer is arranged on the upstream surface of each pile wall; the reinforcing piles are embedded into the river channel underwater foundation, an integral body is formed between the adjacent reinforcing piles through the steel wire mesh, the weight of the steel wire mesh is small, transportation and construction are convenient, and the steel wire mesh can play a limiting role on the filling layer while connecting the adjacent two reinforcing piles, so that the stability of the filling layer is improved; the double-row pile wall and the filling layer are utilized to form a complete gravity type water retaining structure, the pile wall is utilized to resist river water pressure, the waterproof layer is utilized to solve the dam body seepage prevention problem, the waterproof and seepage prevention performance is good when the cofferdam is reinforced, the cofferdam strength can be improved to a certain extent, and the integral stability of the cofferdam is improved.

Description

Water retaining cofferdam structure for hydraulic engineering construction

Technical Field

The application relates to the field of hydraulic engineering construction, in particular to a water retaining cofferdam structure for hydraulic engineering construction.

Background

In the construction of water conservancy and hydropower engineering, a cofferdam is often required to be arranged in a river channel so as to prevent water and ensure dry construction of a dam foundation pit.

The existing cofferdam main body structure is usually made of earth and stone, and the earth and stone cofferdam is mainly used as an upstream and downstream transverse cofferdam, can fully utilize local materials, has strong adaptability to a foundation and is simple in construction process.

Aiming at the related technology, the earth-rock cofferdam is formed by filling earth and rock, has lower strength, is easy to collapse due to overlarge river water pressure, and has poor overall stability.

Disclosure of Invention

In order to improve cofferdam intensity to a certain extent, improve the overall stability of cofferdam, this application provides a water retaining cofferdam structure for hydraulic engineering construction.

The application provides a water conservancy project construction is with manger plate cofferdam structure adopts following technical scheme:

the utility model provides a water retaining cofferdam structure for hydraulic engineering construction, includes the weir body, the weir body includes two at least stake walls, the stake wall includes a plurality of fixed reinforcing piles that set up in the river course, adjacent reinforcing piles pass through connecting piece fixed connection, are provided with the filling layer between the adjacent stake wall, the upstream face of stake wall is provided with the waterproof layer.

Through adopting above-mentioned technical scheme, consolidate stake embedding river course submarine foundation, form a whole through the connecting piece between the adjacent stake that consolidates, utilize double stake wall and filling layer to form a complete gravity type manger plate structure, utilize the stake wall to resist river water pressure, utilize the waterproof layer to solve the weir body prevention of seepage problem, waterproof impervious performance is better when consolidating the cofferdam, can improve cofferdam intensity to a certain extent, is favorable to improving the overall stability of cofferdam.

Optionally, the connecting piece sets up to the wire net, the wire net is located between the adjacent reinforcement stake, the wire net can be dismantled with the reinforcement stake and be connected.

Through adopting above-mentioned technical scheme, wire net weight is less, is convenient for transport and construction, and the wire net can also play limiting displacement to the filling layer when connecting two adjacent reinforcing piles to improve the stability of filling layer, and the wire net can be dismantled with reinforcing piles and be connected the loading and unloading of cofferdam of being convenient for.

Optionally, the both ends of wire net are fixed and are provided with the connecting block, the spliced pole has been seted up and has been supplied connecting block male spread groove, the connecting block is pegged graft with the spread groove, the spliced pole is provided with the mounting that is used for fixed connecting block position.

By adopting the technical scheme, the connecting blocks are inserted into the connecting grooves, and the steel wire mesh and the reinforcing piles can be fixedly connected by fixing the connecting blocks through the fixing pieces; and removing the constraint effect of the fixing piece on the connecting block, and removing the steel wire mesh and the reinforcing pile by sliding the connecting block out of the connecting groove.

Optionally, the filling layer is formed by piling a plurality of woven bags filled with sand pebbles.

By adopting the technical scheme, the filling layer is formed by piling a plurality of woven bags filled with sand pebbles, so that the purpose of filling is realized, and meanwhile, the cofferdam can be conveniently removed and built.

Optionally, the waterproof layer is set to waterproof cloth, and the waterproof cloth is fixed on the upstream surface of the pile wall through the fixed layer.

By adopting the technical scheme, the waterproof cloth is convenient to construct, and meanwhile, the cost is lower, and the waterproof effect is better.

Optionally, the fixing layer is formed by piling a plurality of woven bags filled with soil.

Through adopting above-mentioned technical scheme, pile up the action that forms fixed layer through a plurality of braided bags that fill with soil and can realize fixed waterproof cloth, can not cause the damage to waterproof cloth simultaneously, be favorable to buffering simultaneously and fall the impact force of river water to waterproof cloth, be convenient for protect waterproof cloth.

Optionally, an impermeable layer is arranged on one side of the fixing layer away from the waterproof cloth.

By adopting the technical scheme, the impermeable layer is favorable for reducing the water seepage and water leakage, and is favorable for further increasing the water retaining effect of the cofferdam.

Optionally, the impermeable layer is configured as a clay layer.

By adopting the technical scheme, the clay contains few sand grains and has viscosity, water is not easy to pass through, and meanwhile, the clay has good plasticity, so that the clay can play a role in preventing leakage while being convenient for construction.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the reinforcing piles are embedded into the river channel underwater foundation, an integral body is formed between adjacent reinforcing piles through the connecting piece, a complete gravity type water retaining structure is formed by using double-row pile walls and the filling layer, the pile walls are used for resisting river water pressure, the waterproof layer is used for solving the barrier seepage prevention problem, the water resistance and the seepage prevention performance are good when the cofferdam is reinforced, the cofferdam strength can be improved to a certain extent, and the integral stability of the cofferdam is improved;

2. the steel wire mesh is small in weight, convenient to transport and construct, and can play a limiting role on the filling layer when connecting two adjacent reinforcing piles, so that the stability of the filling layer is improved, and the steel wire mesh and the reinforcing piles are detachably connected, so that the cofferdam is convenient to assemble and disassemble;

3. the fixed layer can be formed by piling up a plurality of woven bags filled with soil, so that the waterproof cloth can be fixed, the waterproof cloth cannot be damaged, the impact force of river water on the waterproof cloth can be buffered, and the waterproof cloth can be protected conveniently.

Drawings

FIG. 1 is a schematic overall structure of an embodiment of the present application;

FIG. 2 is a schematic view of a weir according to an embodiment of the present disclosure;

fig. 3 is a schematic structural view of a reinforcing pile and a connecting member according to an embodiment of the present application.

Reference numerals illustrate: 11. river course; 12. a water channel; 2. a weir body; 21. pile wall; 211. reinforcing piles; 2111. a connecting groove; 22. a filling layer; 23. a waterproof layer; 24. a fixed layer; 25. an impermeable layer; 31. a steel wire mesh; 32. a connecting block; 33. and (5) connecting bolts.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-3.

The embodiment of the application discloses a water retaining cofferdam structure for hydraulic engineering construction.

Referring to fig. 1 and 2, a water retaining cofferdam structure for hydraulic engineering construction comprises a weir body 2 and a water intake channel 12 for intercepting a river, wherein the weir body 2 comprises at least two pile walls 21, the pile walls 21 close to one side of the upstream surface of the weir body 2 are arc-shaped, the pressure of the river can be effectively resisted, and the arch height of the pile walls 21 is 10% of the river width and not less than 2m. The pile wall 21 on the side close to the back surface of the weir 2 extends in a direction perpendicular to the flow direction of the river. Two weirs 2 are arranged along the flowing direction of the river, and a construction area is formed between the two weirs 2. The water channel 12 is used for bypassing the two weirs 2 to introduce upstream river water into the downstream, so that on one hand, the construction is performed while the river is guaranteed to be continuous, and meanwhile, the impact of the river on the upstream weirs 2 is reduced, and the probability that the upstream weirs 2 are washed down is reduced.

Referring to fig. 2, a filling layer 22 is provided between adjacent pile walls 21, the filling layer 22 is formed by piling a plurality of woven bags filled with sand pebbles, and the woven bags are made of polypropylene woven cloth or polypropylene woven cloth. A waterproof layer 23 is arranged on the upstream surface of the pile wall 21 close to the upstream surface of the weir body 2, and the waterproof layer 23 is waterproof cloth. The waterproof cloth is set to be polyethylene color stripe cloth, and the polyethylene color stripe cloth has sun-proof and good waterproof performance: the tensile strength index of the polyethylene color stripe cloth is as follows: the warp strength is more than or equal to 2100N/5CM, the weft strength is more than or equal to 1600N/5CM, and the waterproof performance is as follows: the water pressure resistance value is more than or equal to 2000MM water column; meanwhile, the polyethylene color stripe cloth can resist low temperature, the cold-resistant temperature is minus 20 ℃, and mildew resistance can also be realized, and the mildew resistance experiment is the first stage.

Referring to fig. 2, a waterproof cloth is fixed on the upstream surface of the pile wall 21 by a fixing layer 24, and the waterproof cloth is formed by overlapping a plurality of polyethylene color stripe cloths. The lap joint length of the upper layer and the lower layer of polyethylene color stripe cloth is 1m, and the length of the rest lap joint is 0.5m. The fixing layer 24 is formed by piling a plurality of woven bags filled with soil, and the woven bags are made of polypropylene woven cloth or polypropylene woven cloth. The fixed layer 24 is provided with the barrier layer 25 on the side of keeping away from the waterproof cloth, and the barrier layer 25 sets up to clay layer, and clay contains little sand grain and has stickness, and moisture is difficult to pass through in it, has better plasticity simultaneously. The thickness of the impermeable layer 25 is 0.5m-1m to reduce the occurrence of water seepage and water leakage.

Referring to fig. 2 and 3, the pile wall 21 includes a plurality of reinforcing piles 211 fixedly disposed in the river 11, the reinforcing piles 211 being buried in the river 11, and the plurality of reinforcing piles 211 extending along the direction of the pile wall 21. The reinforcing piles 211 have a diameter of 15cm to 20cm and a height of 4m to 6m, the shortest distance between two adjacent pile walls 21 is 1.5m, and the distance between adjacent reinforcing piles 211 is 1m. Two adjacent reinforcing piles 211 of the same pile wall 21 are fixedly connected through a connecting piece, the connecting piece is arranged to be a steel wire net 31, the steel wire net 31 comprises transverse steel wires and vertical steel wires, the transverse steel wires and the vertical steel wires are provided with a plurality of reinforcing piles, and the transverse steel wires and the vertical steel wires are fixedly connected and mutually perpendicular. The steel wire mesh 31 is positioned between the adjacent reinforcing piles 211, and two ends of the steel wire mesh 31 are detachably connected with the reinforcing piles 211 on two sides respectively.

Referring to fig. 3, connection blocks 32 are fixedly provided at both ends of the steel wire mesh 31, the connection blocks 32 are provided as T-shaped blocks, the reinforcing piles 211 are provided with connection grooves 2111 into which the connection blocks 32 are inserted, the connection grooves 2111 are provided as T-shaped grooves, the connection grooves 2111 are provided on the side walls of the reinforcing piles 211 adjacent to the adjacent reinforcing piles 211 in the height direction of the reinforcing piles 211, and the connection grooves 2111 penetrate through the top walls of the reinforcing piles 211. The connecting block 32 is spliced with the connecting groove 2111, the reinforcing pile 211 is provided with a fixing piece for fixing the position of the connecting block 32, the fixing piece is provided with connecting bolts 33, the connecting bolts 33 are threaded in the reinforcing pile 211 and the connecting block 32 at the same time, the connecting bolts 33 are provided with a plurality of, and the connecting bolts 33 correspond to the connecting blocks 32 one by one.

The implementation principle of the water retaining cofferdam structure for hydraulic engineering construction is as follows: in the river course 11 submarine foundation is beaten into to the stake 211 in advance, form a whole through wire net 31 between the adjacent stake 211, wire net 31 weight is less, and the transportation and the construction of being convenient for, wire net 31 can also play spacing effect to filling layer 22 when connecting two adjacent stake 211 to improve filling layer 22's stability. The double-row pile wall 21 and the filling layer 22 are utilized to form a complete gravity type water retaining structure, the pile wall 21 is utilized to resist river water pressure, the waterproof layer 23 and the impermeable layer 25 are utilized to solve the problem of seepage prevention of the weir body 2, the water-proof and seepage-proof performance is good while the cofferdam is reinforced, the cofferdam strength can be improved to a certain extent, and the overall stability of the cofferdam is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. Water retaining cofferdam structure is used in hydraulic engineering construction, its characterized in that: including the weir body (2), the weir body (2) includes two at least stake walls (21), stake wall (21) are including a plurality of fixed reinforcement stake (211) that set up in river course (11), and is adjacent consolidate stake (211) are through connecting piece fixed connection, are provided with filling layer (22) between adjacent stake wall (21), the upstream face of stake wall (21) is provided with waterproof layer (23).

2. The water retaining cofferdam structure for hydraulic engineering construction according to claim 1, wherein: the connecting piece is arranged to be a steel wire mesh (31), the steel wire mesh (31) is positioned between adjacent reinforcing piles (211), and the steel wire mesh (31) is detachably connected with the reinforcing piles (211).

3. The water retaining cofferdam structure for hydraulic engineering construction according to claim 2, characterized in that: connecting blocks (32) are fixedly arranged at two ends of the steel wire mesh (31), connecting grooves (2111) for the connecting blocks (32) to be inserted into are formed in the reinforcing piles (211), the connecting blocks (32) are spliced with the connecting grooves (2111), and fixing pieces for fixing the positions of the connecting blocks (32) are arranged on the reinforcing piles (211).

4. The water retaining cofferdam structure for hydraulic engineering construction according to claim 1, wherein: the filling layer (22) is formed by piling a plurality of woven bags filled with sand pebbles.

5. The water retaining cofferdam structure for hydraulic engineering construction according to claim 1, wherein: the waterproof layer (23) is arranged as waterproof cloth, and the waterproof cloth is fixed on the upstream surface of the pile wall (21) through the fixing layer (24).

6. The water retaining cofferdam structure for hydraulic engineering construction of claim 5, wherein: the fixed layer (24) is formed by piling a plurality of woven bags filled with soil.

7. The water retaining cofferdam structure for hydraulic engineering construction of claim 5, wherein: the side of the fixing layer (24) far away from the waterproof cloth is provided with an impermeable layer (25).

8. The water retaining cofferdam structure for hydraulic engineering construction of claim 7, wherein: the barrier layer (25) is provided as a clay layer.