CN110984060B - Flexible water-blocking structure - Google Patents
Flexible water-blocking structure Download PDFInfo
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- CN110984060B CN110984060B CN201911370796.9A CN201911370796A CN110984060B CN 110984060 B CN110984060 B CN 110984060B CN 201911370796 A CN201911370796 A CN 201911370796A CN 110984060 B CN110984060 B CN 110984060B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
- E02B1/003—Mechanically induced gas or liquid streams in seas, lakes or water-courses for forming weirs or breakwaters; making or keeping water surfaces free from ice, aerating or circulating water, e.g. screens of air-bubbles against sludge formation or salt water entry, pump-assisted water circulation
Abstract
The invention discloses a flexible water-blocking structure which comprises a first flexible water-blocking curtain wall and a second flexible water-blocking curtain wall, wherein the first flexible water-blocking curtain wall is used for blocking low-temperature water in a dead water area in front of a water intake of a reservoir, the second flexible water-blocking curtain wall is used for blocking low-temperature water in a water changing area in front of the water intake of the reservoir, the first flexible water-blocking curtain wall is vertically fixed in the dead water area and is perpendicular to the water flow direction, the bottom of the second flexible water-blocking curtain wall is connected with the top of the first flexible water-blocking curtain wall, and the second flexible water-blocking curtain wall is positioned in the water changing area and inclines towards the rear of water flow relative to the first flexible water-blocking curtain wall. Therefore, the first flexible water-blocking curtain wall intercepts low-temperature water in a dead water area, the second flexible water-blocking curtain wall intercepts low-temperature water in a variable water area, and surface high-temperature water flows through the top of the second flexible water-blocking curtain wall. The design of suspension and suspension structure partition can reduce buoyancy tank and cable net structure effort, solves the cable net membrane under the water level variation and frequently drags the problem that the life-span is low.
Description
Technical Field
The invention belongs to the technical field of hydraulic and hydroelectric engineering, and particularly relates to a flexible water-blocking structure.
Background
The river basin water conservancy and hydropower project construction often can build some high dam big storehouses to improve the engineering benefit, because its reservoir storage capacity is big, the velocity of flow is slow, the obvious temperature stratification phenomenon will appear in the crossing of spring and summer. And the water intake elevation of the hydropower station or water intake drainage facility is low due to the power generation requirement, so that the outflow water temperature of the reservoir is lower than the water temperature of the natural river channel, the water temperature of the natural river channel under the dam is changed, and adverse effects are generated on the aspects of farmland irrigation, industrial water supply, domestic water, the water quality and ecological balance of downstream rivers, the utilization of reservoir water and the like.
Constructors take various measures to improve the temperature of discharged water of a hydropower station, various schemes are provided for preventing and controlling the low-temperature water discharged from the hydropower station or a water intake at present, and the schemes mainly comprise a low-temperature water interception dam, a shore tower type water inlet layered water intake, a reinforced concrete enclosure, a stoplog door layered water intake and the like. In addition, the traditional layered water taking mode needs to be controlled in structure constantly, and more manpower and material resources need to be consumed.
In recent years, a flexible water retaining curtain wall structure with simple structural style and relatively low investment is being proposed for treating the problem of low-temperature water leakage of a high dam and a large reservoir, specifically, with reference to CN201410623870.4, a flexible impermeable curtain wall with a proper water retaining height is built at a proper position in front of a water intake, a water passing section with a certain height is reserved between the top of the curtain wall and the water surface, reservoir water with higher upper temperature is allowed to enter a water area in front of the dam through the water passing section, reservoir water with lower temperature is blocked from entering the water area in front of the dam, and a water temperature distribution structure of the water area in front of the water intake is changed, so that the purpose of improving the water temperature of the low-temperature water leakage is achieved. The flexible curtain wall in the existing research is integrally hung on a buoyancy tank or a floating bridge, the horizontal action of the curtain body is mainly transmitted to an anchoring system at the bottom of a reservoir, and part of the horizontal action is transmitted to two banks. However, the method has not been applied to practical engineering due to the complex engineering technology. In particular, the traditional flexible curtain wall has the following technical drawbacks:
(1) the waterproof flexible curtain walls are large and have huge horizontal acting load, and the integral suspension on the buoyancy tank or the pontoon bridge often has the characteristics of large volume of the buoyancy tank, large longitudinal force transmission cable, large underwater anchoring structural force and the like;
(2) the water-proof curtain wall automatically rises and falls along with the change of the reservoir water level between a normal water storage level and a dead water level, the cutting depth of the reservoir water level of a high dam is large, the high dam and the large dam frequently rise and fall, the lower curtain body is frequently dragged, the structural stress is complex, and the curtain body is easily damaged;
(3) the pulling force of the longitudinal stay cable of the curtain wall to the ground anchor structure is a variable force. The water-proof curtain wall can be automatically lifted along with the change of the water level of the reservoir from a normal water storage level to a dead water level, and the curtain wall and the longitudinal stay cable can be self-adapted to the change of the water level to adjust the shape of the curtain wall and the longitudinal stay cable. Different water levels of operation are different in water passing section, water flow speed and pressure distribution, so that the curtain wall and the longitudinal stay rope are different in body form, the size and the direction of the tension transmitted to the underwater ground anchor structure are different, the acting force level is larger, and particularly the horizontal direction can reach 500-plus-600 kN. Because the riverbed is often covered deeply, the exposed free section of the ground anchor above the rock is longer, and therefore the ground anchor structure is required to have enough rigidity or the exposed free section of the rock is a flexible structure and can be suitable for angle change.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a flexible water-blocking structure which can prolong the service life of a water-resisting curtain wall, simplify the structure and save the cost.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a flexible structure that blocks water, is including the first flexible curtain that blocks water that is used for intercepting stagnant water district low-temperature water before the reservoir intake to and be used for intercepting the flexible curtain that blocks water of second that changes water district low-temperature water before the reservoir intake, first flexible curtain that blocks water vertical fixation in stagnant water district and perpendicular to rivers direction, the bottom of the flexible curtain that blocks water of second links to each other with the top that the curtain that blocks water of first flexibility, and the flexible curtain that blocks water of second is located change water district and relative first flexible curtain that blocks water and inclines towards rivers rearward.
From this, the first flexible curtain that blocks water intercepts stagnant water district low-temperature water that the velocity of flow is low, and the second flexible curtain that blocks water intercepts the high change water district low-temperature water of the velocity of flow, top layer high temperature water flows through from the flexible curtain top that blocks water of second. This structure has fully combined reservoir water level operating range and atress characteristics, sets up tilting and fixed curtain respectively below water level fluctuation region and dead water level, decomposes the huge atress of traditional water proof curtain to the slope curtain on the wall, has hang and suspension structure partition design, reduces flotation tank and cable net structure effort, the system safety monitoring of being convenient for advantage such as monitoring, has solved under the water level change cable net membrane and has frequently dragged the problem that leads to the life-span to hang down.
As a further improvement of the above technical solution:
practice shows, considers curtain construction condition and operating system's lifting force and the protection of the flexible curtain that blocks water of second, and the flexible curtain that blocks water of second satisfies with the contained angle alpha of horizontal plane: alpha is less than or equal to 85 degrees, the distance between the top of the second flexible water-blocking curtain wall and the first flexible water-blocking curtain wall is less than or equal to 0.3 time of the maximum fluctuation water depth H of the reservoir water level, and the smaller the distance is, the more favorable the reduction of the lifting force and the protection of the second flexible water-blocking curtain wall are.
The top of the flexible water curtain that hinders of second is fixed with a removal weir that is located the change water district, it links to each other with a plurality of flotation tanks to remove the weir, the flotation tank floats on the surface of water. The buoyancy tank and the inclined curtain wall change along with the water level in the vertical direction, and the protection of the whole waterproof structure is facilitated.
Preferably, the automatic buoyancy tank is formed by hinging and connecting a plurality of standard tank modules.
The two ends of the length direction of the moving water weir extend towards the two banks of the reservoir respectively, and the plurality of floating boxes are arranged at intervals along the length direction of the moving water weir.
The floating box is arranged on a vertically arranged guide cable in a penetrating mode, the upper ends of the guide cables are connected with an upper cable, the lower ends of the guide cables penetrate through the water weir and then are connected with a lower cable, and the two ends of the upper cable and the lower cable are fixed on the corresponding bank walls of the reservoir respectively. The center of the buoyancy tank is provided with a vertical sliding chute, and a buoyancy tank guide cable passes through the vertical sliding chute and can freely slide along the guide cable.
Preferably, the guide cable is epoxy sprayed unbonded steel stranded wire, is wrapped by anti-abrasion materials and is vertically arranged.
Preferably, the upper cable is erected on the cable saddle of the upper cable tower and anchored on the ground anchor, the lower cable is anchored on the ground anchors on two sides, and the guide cable is respectively connected with the upper cable on the suspended top and the lower cable on the suspended lower part on the same vertical surface to form the automatic buoyancy tank sliding rod.
The movable water-passing weir is connected with the buoyancy tank through a telescopic anchor chain.
The movable water passing weir body is of a cast iron structure, the upper part of the movable water passing weir body is provided with a hanging ring and is connected with the end shackle of the anchor chain, and the lower part of the movable water passing weir body is provided with a clamping groove of a membrane structure and is connected with a second flexible water blocking curtain wall of a suspension structure.
Preferably, a bridge deck is laid between the pontoons to form a pontoon bridge which is communicated from left to right, an automatic hoisting device is arranged on the pontoon bridge, and the upper end of the anchor chain is wound in the hoisting device. The hoisting device adjusts the suspension distance between the buoyancy tank and the moving overflow weir body, and the buoyancy tank is provided with a clamping groove which can lock the anchor chain with gears at different gears.
The bottom of the second flexible water-blocking curtain wall is connected with the top of the first flexible water-blocking curtain wall through a rotating shaft, and two ends of the rotating shaft in the length direction extend towards two banks of the reservoir respectively. The rotating shaft is preferably an epoxy-coated stainless steel structure.
Wear to be equipped with many slings in the axis of rotation, many slings are along the length direction interval arrangement of axis of rotation, and the upper end of many slings all links to each other with a suspension cable, and the lower extreme of many slings is fixed in the bottom of reservoir, first flexibility curtain that blocks water is connected with the hoist cable.
Preferably, the suspension cable is erected on a cable saddle of the downstream cable tower and anchored on a deepwater ground anchor, the deepwater ground anchor is formed by drilling, anchoring and grouting on a riverbed and two banks to form an anchoring body, two ends of the suspension sling are respectively tied on the suspension main cable and the deepwater ground anchor and are tensioned and locked by adopting prestress to form a plane prestress cable net structure, the rotating shaft is horizontally and vertically arranged on the suspension sling, and is tensioned and locked by adopting prestress, and the single strand of steel strand is epoxy-sprayed unbonded steel strand.
The upper end of the first flexible water-blocking curtain wall is hung on the rotating shaft, the middle part of the first flexible water-blocking curtain wall is connected with the hanging sling through the connecting ring, and the first flexible water-blocking curtain wall keeps vertical under the action of the counterweight of the lower rope so as to intercept the low-temperature water body at the lower part.
The upper end of the suspended second flexible water-blocking curtain wall is hung on the automatic buoyancy tank through a baffling anchor chain, the upper end of the suspended second flexible water-blocking curtain wall automatically rises and falls along with the rise and fall of the water level, a shallow high-temperature water body flows through the gap at the upper part of the weir body, the lower end of the suspended second flexible water-blocking curtain wall is connected to the rotating shaft, and the second flexible water-blocking curtain wall can rotate around the rotating shaft.
Compared with the prior art, the invention has the advantages that:
1. according to the flexible water blocking structure, the movable cable net film structure and the fixed cable net film structure are respectively arranged in the water level change area and below the dead water level, the flexible water blocking structure has the advantages of being provided with the suspended and suspended structure in a partition design, reducing acting force of the floating box and the cable net structure, facilitating system safety monitoring and the like, and the problem that the cable net film is frequently dragged under water level change is solved.
2. The flexible water blocking structure has the advantages of simple structure, small cable net deformation, definite ground anchor stress action, convenience in construction, reduction of vertical action and the like, and solves the problems of uncertain stress direction change of the deepwater ground anchor.
3. The flexible water-blocking structure has good self-adjusting performance, can adapt to different water levels and different operating conditions simultaneously, and saves manpower and material resources.
4. The flexible water blocking structure has a small plane arrangement range, and the floating box and the suspended net film change along with the water level in the vertical direction, so that the protection of the whole water blocking structure is facilitated.
5. The flexible water-blocking structure is low in manufacturing cost, the buoyancy tank and the cable net system can be used as a working platform for water construction and cable net film structure lowering, installation and maintenance are convenient, construction technology difficulty is further reduced, electric quantity is not lost while the lower water discharge temperature is improved, and cost is saved.
Drawings
Fig. 1 is a schematic top view of the flexible water-blocking structure of the present invention.
Fig. 2 is a schematic longitudinal sectional view of the flexible water blocking structure of the present invention.
Fig. 3 is a schematic cross-sectional structure view of the flexible water-blocking structure of the present invention.
FIG. 4 is a schematic cross-sectional view of the flexible water-blocking structure of the present invention operating at a low water level.
Fig. 5 is a schematic cross-sectional view of a flexible water-blocking structure of the present invention during operation in a flood discharge situation.
Illustration of the drawings: 1. a first flexible water-blocking curtain wall; 2. a ground anchor; 3. a sling; 4. the second flexible water-blocking curtain wall; 5. a rotating shaft; 6. moving over the weir; 7. a guide cable; 8. a buoyancy tank; 9. cable laying; 10. an upstream cable tower; 11. a downstream cable tower; 12. a mountain body; 13. suspending a cable; 14. a cable is laid; 15. And (4) an anchor chain.
Detailed Description
The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.
Example (b):
as shown in fig. 1 to fig. 3, the flexible water blocking structure of the present embodiment includes a suspended cable net structure and a suspended cable net structure.
The suspension cable net structure comprises a downstream cable tower 11, a first flexible water-blocking curtain wall 1, a suspension cable 13, a suspension sling 3, a deepwater ground anchor 2, a rotating shaft 5, longitudinal and transverse Dinima ropes, a geotextile film and a lower steel counterweight. The suspension sling 3 adopts a prestressed steel strand, is connected with the deep water ground anchor 2 and the suspension main cable 13, plays the role of fixing the first flexible water-blocking curtain wall 1 and the rotating shaft 5, and hangs two ends of the suspension main cable 13 on a cable saddle of the downstream cable tower 11 and is connected with the ground anchor fixed in the mountain 12 at two sides. Lower steel counter weight is used for fixed first flexible curtain 1 lower part that blocks water, and first flexible curtain 1 upper end that blocks water is through vertical denyma rope and 5 fixed connection of axis of rotation, and vertical denyma rope intermediate configuration a plurality of rope spacing rings are overlapped on suspension cable 3 for restrict first flexible curtain 1 swing that blocks water.
The suspension cable net structure comprises an upstream cable tower 10, a second flexible water-blocking curtain wall 4, an automatic buoyancy tank 8, an upper cable 9, a lower cable 14, a buoyancy tank guide cable 7, a moving water-passing weir 6, a baffled anchor chain 15, longitudinal and transverse Dinima ropes, a geotextile membrane and a counterweight. The suspension upper cable 9 is hung on a cable saddle of an upstream cable tower 10, two ends of the suspension upper cable are connected with ground anchors fixed at two ends of a mountain body, the suspension lower cable 14 is connected with the ground anchors fixed at two ends of the mountain body, the buoyancy tank guide cable 7 is connected with the suspension upper cable 9 and the suspension lower cable 14, and the automatic buoyancy tank 8 is connected on the buoyancy tank guide cable 7 and can freely slide up and down along the guide cable. Two ends of a longitudinal Dyneema rope on the second flexible water-blocking curtain wall 4 are respectively connected to the rotating shaft and the moving water-passing weir body to form a plane longitudinal cable net. The flexible water-blocking curtain wall structure can be folded, unfolded and maintained by arranging the folding and unfolding winch device on the buoyancy tank.
The upper end of the second flexible water-blocking curtain wall 4 is connected with a movable water-passing weir 6, and the lower end is connected with a rotating shaft 5. The movable water-passing weir 6 is connected with the upper part of the second flexible water-blocking curtain wall 4, plays a role in fixing and protecting an upper cable net film, increases the weight of the second flexible water-blocking curtain wall 4 and keeps sinking, the vertical baffled anchor chain 15 passes through cable holes on the movable water-passing weir 6 and the automatic buoyancy tank 8, a designed water passing height (or a check water passing height) is reserved between the movable water-passing weir 6 and the automatic buoyancy tank 8, and the vertical baffled anchor chain 15 is locked on the automatic buoyancy tank 8.
The first flexible water-blocking curtain wall 1 and the second flexible water-blocking curtain wall 4 are both made of impermeable cable net films, and the first flexible water-blocking curtain wall 1 and the water-passing weir 6 with the upper end moving can freely move up and down along with the automatic buoyancy tank 8.
The deepwater anchor 2 is an anchoring body formed by deepwater drilling, complete rock deepening, anchor cable lowering and grouting, and the upper part of the deepwater anchor is provided with a cable section cable penetrating hole which can penetrate through a prestressed anchor cable.
Referring to fig. 3, the included angle α between the second flexible water-blocking curtain wall 4 and the horizontal plane satisfies: alpha is less than or equal to 85 degrees (alpha is an included angle between the connecting line of the water-passing weir 6 and the rotating shaft 5 and the horizontal plane, clockwise is positive, and anticlockwise is negative), the distance between the two water-blocking curtain walls is not more than 0.3 times of the maximum fluctuation water depth H (namely the difference between the highest water level and the lowest water level) of the water level of the reservoir in consideration of the construction conditions of the curtain walls, the lifting force of the lifting system and the protection of the second flexible water-blocking curtain wall, and the smaller the distance is, the more beneficial to the reduction of the lifting force and the protection of the second flexible water-blocking curtain wall are.
Referring to the attached figures 1 and 2, the proper position of the cable net cable membrane is firstly determined according to the positions of the power generation water inlet and the dam body.
The first flexible water-blocking curtain wall 1 and the second flexible water-blocking curtain wall 4 are made of waterproof cloth film structures, and low-temperature water at the lower part is blocked at the upstream of the curtain walls in a flexible curtain wall mode; the upper edge and the lower edge of the first flexible water-blocking curtain wall 1 are respectively provided with a rotating shaft 5 and a lower-line mopping skirt pendulum, and the first flexible water-blocking curtain wall is hung on a suspension sling 3 and mainly plays a role in fixing the peripheral shape of a cable net cable film; the upper edge and the lower edge of the second flexible water-blocking curtain wall 4 are respectively provided with a movable water-passing weir 6 and a rotating shaft 5, so that the vertical position of the second flexible water-blocking curtain wall 4 is freely adjusted in the water level fluctuation process, and the peripheral shape of the cable net cable membrane is fixed; the buoyancy tank guide cables 7 and the suspension slings 3 are supporting structures of suspended and suspended cable net film structures, and have the characteristic of small deformation under the action of prestress; the automatic buoyancy tank 8 system is connected into a floating bridge through a bridge deck device, and the floating bridge is provided with an automatic winch, a baffled anchor chain 15 and a locking device, mainly plays roles of automatically adjusting the second flexible water-blocking curtain wall 4 and moving the height of the water-blocking weir, and plays roles of lowering and lifting the second flexible water-blocking curtain wall 4 and the first flexible water-blocking curtain wall 1; the cable net structure consists of a suspended upper cable 9, a suspended lower cable 14, a suspended main cable 13, a deepwater ground anchor 2, an upstream cable tower 10, a downstream cable tower 11 and the like, and mainly plays the roles of supporting a cable net film, a buoyancy tank structure and a lowering and recovering water-resisting membrane structure; as shown in the attached figure 3, the deepwater ground anchor 2 is an underwater anchoring structure, and a cable joint cable penetrating hole is reserved at the upper end of the deepwater ground anchor and mainly plays a role in tensioning and suspending a sling 3 and controlling the structural displacement of the first flexible water-blocking curtain wall 1.
From this, first flexible curtain 1 that blocks water intercepts stagnant water district low temperature water and passes through the reservoir water intaking mouth, and second flexible curtain 4 that blocks water intercepts change water district low temperature water and passes through the water intaking mouth, and the high temperature water of top layer flows through the weir body.
The device simple structure, fully combined reservoir water level operating range and atress characteristics, set up and hang district and unsteady district, decompose the huge atress of cable net membrane structure to the cable net structural, can simplify the design and the construction of main atress structure, the design of automatic flotation tank makes water proof structure have the self-adaptability, can be applicable to the various operating modes of reservoir operation simultaneously, main push-towing rope and the cable net of stretching across the reservoir can conveniently arrange suspension system, combine with automatic flotation tank and can realize that the water proof curtain transfers, the installation, retrieve, safety monitoring etc., water proof cable net membrane's practicality has been improved.
The construction process of the flexible water blocking structure of the embodiment is as follows:
(1) the construction of the upstream cable tower 10 and the downstream cable tower 11 and the construction of the deepwater ground anchor 2. And (3) constructing an upstream cable tower and a downstream cable tower and an anchor on two sides of the axis of the cable net cable membrane structure respectively, and drilling a deepwater ground anchor 2 on the axis through an overwater platform.
(2) The suspension upper cable 9, the suspension main cable 13 and the suspension lower cable 14 are installed. The suspended upper cable 9 and the suspended main cable 13 are respectively hung on cable tower cable saddles on two banks and are connected to anchor blocks on the two banks. Suspending an upper cable 9 and a suspension 13 on a left-end cable saddle, after the left-end cable saddle is fixed with a left-end anchorage, pulling the right end of a steel cable by using a ship, moving the steel cable from the left bank to the right bank, drawing the right ends of main cables 9 and 13 onto a cable tower saddle of the right bank, connecting the main cables with the right bank anchorage, and finally tensioning the upstream main cable 9 and the downstream main cable 13 to realize the installation of the upstream main cable 9 and the downstream main cable 13. The suspended lower cable 14 is horizontally arranged, tied to an anchorage and tensioned.
(3) The suspension sling 3 and the buoyancy tank guide rope 7 are installed. The upper end and the lower end of a suspension sling 3 are vertically connected with a suspension main cable 13 and a corresponding deepwater ground anchor 2, the upper end and the lower end of a buoyancy tank guide cable 7 are vertically connected with a suspension upper cable 9 and a suspension top main cable 1, and the suspension sling 3 and the buoyancy tank guide cable 7 are subjected to prestress tensioning to form a vertical prestress cable net structure.
(4) The automatic buoyancy tank 8 is installed. The installation of the floating box adopts a method of putting in sections and connecting in sequence to form a floating bridge; the automatic pontoon 8 of at first will segmenting transports the bank pier to, uses the ship to drag and draws the position of low reaches cable tower 13, assembles from one bank to another bank in proper order, after the whole concatenations of pontoon are accomplished, carries out the bridge floor pavement and both sides railing installation, finally forms the pontoon bridge that left and right sides bank link up.
(5) The first flexible water-blocking curtain wall 1 and the second flexible water-blocking curtain wall 4 are placed downwards, and the rotating shaft 5 is installed. The method comprises the steps of conveying a fixed pulley, a winding device, a Dinima rope, a cable net film and the like to a through floating bridge, installing the fixed pulley device on a suspension sling 3 on the downstream side, enabling the Dinima rope to penetrate through the fixed pulley, hanging a foot line and a balance weight in a drooping mode, spreading the cable net film horizontally from left to right, connecting the cable net film with the Dinima rope drooping through the fixed pulley and a contact ring, sewing a film structure, meanwhile, descending a first flexible water-blocking curtain wall 1 section by section, circulating in the mode, installing a rotating shaft 5 at the joint of the first flexible water-blocking curtain wall 1 and a second flexible water-blocking curtain wall 4, continuing to pave and connect and descend a movable cable net film 4 until the foot line and the balance weight contact the bottom of a warehouse, hanging the rotating shaft 5 on the suspension sling 3 and locking the position at the same height as a power generation water inlet, and continuing to pave and connect and descend the second flexible water-blocking curtain wall 4.
(6) Moving over the weir 6 and mounted with a chain 15. Then assembling and moving the floating weir and tying the balance weight, connecting and moving the dinima rope after finishing moving all the cable net films to the floating weir 7, clamping the movable cable net films 4 into the water-passing weir body 7, locking, passing the baffled anchor chain 15 through the central reserved hole of the movable water-passing weir body, and putting the baffled anchor chain together with the movable water-passing weir, and putting the anchor chain to a designed height to lock the sling of the floating box on the floating box. And drawing the automatic buoyancy tank 8 to the upstream side cable net structure position, and connecting the buoyancy tank guide cable 7 to the chute of the automatic buoyancy tank 8, so as to complete the construction of the automatic lifting cable net cable film waterproof structure.
(7) And (5) monitoring, overhauling and maintaining the operation of the cable net membrane water-insulation structure system. If meeting the flood discharge working condition, the anchor chain 15 with the stopper is lowered to the height of the nuclear checking working condition, and the suspended cable net membrane structure is ensured not to be influenced by the flood discharge high-speed water flow. Regular inspection tour, nondestructive testing, automatic equipment monitoring and underwater camera shooting are carried out on the cable tower structures 10 and 11, the main cable, the prestressed suspension sling 3 and the cable net film structure regularly. And determining whether to overhaul and maintain the cable net film structure according to the analysis result of the operation monitoring data, wherein the overhaul method is to hoist the cable net film to the floating bridge platform through a suspension device on the suspension sling 3 to repair the cable net film in a partitioned manner.
According to the sequence of cable tower construction, deep water ground anchor construction, main cable installation, suspension sling and buoyancy tank guide cable installation, buoyancy tank installation and cable net film lowering, the installation of the waterproof cable net film is realized by means of a winch on the buoyancy tank and an over-water platform. As shown in fig. 4 and 5, the sling of the automatic buoyancy tank is provided with two gears, and the lowering of the cable net film is realized by switching between a normal operation working condition and a flood working condition through a hoisting device on the buoyancy tank, so that the damage of extreme flood to the cable net film is resisted. The winch device on the automatic buoyancy tank can realize the lowering and recovery of the cable net film structure.
The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.
Claims (7)
1. The flexible water blocking structure is characterized by comprising a first flexible water blocking curtain wall (1) for blocking low-temperature water in a dead water area before a water intake of a reservoir and a second flexible water blocking curtain wall (4) for blocking low-temperature water in a variable water area before the water intake of the reservoir, wherein the first flexible water blocking curtain wall (1) is vertically fixed in the dead water area and is perpendicular to the water flow direction, the bottom of the second flexible water blocking curtain wall (4) is connected with the top of the first flexible water blocking curtain wall (1), the top of the second flexible water blocking curtain wall (4) is fixed with a movable water passing weir (6) in the variable water area, the movable water passing weir (6) is connected with a plurality of buoyancy tanks (8), and the buoyancy tanks (8) float on the water surface, so that the second flexible water blocking curtain wall (4) inclines towards the rear direction of water flow relative to the first flexible water blocking curtain wall (1); the two ends of the moving water-passing weir (6) in the length direction respectively extend towards the two banks of the reservoir, and the plurality of floating boxes (8) are arranged at intervals in the length direction of the moving water-passing weir (6); the floating box (8) is arranged on a vertically arranged guide cable (7) in a penetrating mode and can slide up and down along the guide cable (7), the upper ends of the guide cables (7) are connected with an upper cable (9), the lower ends of the guide cables (7) penetrate through the water weir (6) and then are connected with a lower cable (14), and the two ends of the upper cable (9) and the lower cable (14) are fixed on the corresponding walls of the reservoir respectively.
2. Flexible water-blocking structure according to claim 1, characterized in that the angle α of the second flexible water-blocking curtain wall (4) with the horizontal plane satisfies: alpha is less than or equal to 85 degrees, and the distance between the top of the second flexible water-blocking curtain wall (4) and the first flexible water-blocking curtain wall (1) is less than or equal to 0.3 time of the maximum fluctuation water depth H of the reservoir water level.
3. Flexible water-blocking structure according to claim 2, characterized in that the top of the second flexible water-blocking curtain wall (4) rises and falls as the water level rises and falls.
4. A flexible water-blocking structure according to any one of claims 1 to 3, wherein the moving weir (6) and buoyancy tank (8) are connected by a scalable mooring line (15).
5. Flexible water-blocking structure according to claim 4, characterized in that the buoyancy tank (8) is provided with a hoisting device, in which the upper end of the anchor chain (15) is wound.
6. A flexible water-blocking structure according to any one of claims 1 to 3, wherein the bottom of the second flexible water-blocking curtain wall (4) is connected to the top of the first flexible water-blocking curtain wall (1) by a rotating shaft (5), and the two ends of the rotating shaft (5) in the length direction extend towards the two banks of the reservoir respectively.
7. The flexible water blocking structure according to claim 6, wherein a plurality of slings (3) are arranged on the rotating shaft (5) in a penetrating mode, the slings (3) are arranged at intervals along the length direction of the rotating shaft (5), the upper ends of the slings (3) are connected with a suspension cable (13), the lower ends of the slings (3) are fixed to the bottom of the reservoir, and the first flexible water blocking curtain wall (1) is connected with the slings (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911370796.9A CN110984060B (en) | 2019-12-27 | 2019-12-27 | Flexible water-blocking structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911370796.9A CN110984060B (en) | 2019-12-27 | 2019-12-27 | Flexible water-blocking structure |
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| CN110984060A CN110984060A (en) | 2020-04-10 |
| CN110984060B true CN110984060B (en) | 2021-10-01 |
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| CN111455947A (en) * | 2020-05-13 | 2020-07-28 | 中国电建集团贵阳勘测设计研究院有限公司 | Automatic hierarchical water intaking system |
| CN112580129B (en) * | 2020-11-12 | 2022-07-12 | 中国电建集团中南勘测设计研究院有限公司 | Limit condition analysis method for main component of water-proof curtain wall |
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| CN201334653Y (en) * | 2008-12-25 | 2009-10-28 | 浙江省水利水电勘测设计院 | Floating-type flexible guiding device |
| CN104389297A (en) * | 2014-11-07 | 2015-03-04 | 中国电建集团中南勘测设计研究院有限公司 | Device and method for improving large reservoir stratified low-temperature water |
| CN104878728A (en) * | 2015-06-18 | 2015-09-02 | 天津大学前沿技术研究院有限公司 | Floating-suspending combined flexible water retaining curtain |
| CN107905177A (en) * | 2017-12-08 | 2018-04-13 | 中国电建集团中南勘测设计研究院有限公司 | A kind of reservoir water at low temperature controlling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201334653Y (en) * | 2008-12-25 | 2009-10-28 | 浙江省水利水电勘测设计院 | Floating-type flexible guiding device |
| CN104389297A (en) * | 2014-11-07 | 2015-03-04 | 中国电建集团中南勘测设计研究院有限公司 | Device and method for improving large reservoir stratified low-temperature water |
| CN104878728A (en) * | 2015-06-18 | 2015-09-02 | 天津大学前沿技术研究院有限公司 | Floating-suspending combined flexible water retaining curtain |
| CN107905177A (en) * | 2017-12-08 | 2018-04-13 | 中国电建集团中南勘测设计研究院有限公司 | A kind of reservoir water at low temperature controlling device |
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