CN106939581B - Interception net for dike breach of dam and construction method thereof - Google Patents
Interception net for dike breach of dam and construction method thereof Download PDFInfo
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- CN106939581B CN106939581B CN201710328410.2A CN201710328410A CN106939581B CN 106939581 B CN106939581 B CN 106939581B CN 201710328410 A CN201710328410 A CN 201710328410A CN 106939581 B CN106939581 B CN 106939581B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
- E02B3/106—Temporary dykes
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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 an interception net for a dam bursting mouth and a construction method thereof, wherein the interception net comprises a plurality of steel piles, transverse connecting beams, steel pipes and curtains, wherein each steel pile is provided with a mooring ring and two preformed holes above the mooring ring; sleeves are arranged near two ends of the transverse connecting beam, and a row of spiral sleeve rods are welded on one side wall of the transverse connecting beam; two transverse connecting beams are sequentially sleeved on the two steel piles, wherein the bottom of the lower transverse connecting beam presses a steel pile mooring ring, two support rods for limiting the two transverse connecting beams are respectively inserted into the upper reserved hole and the lower reserved hole, and the upper end and the lower end of the curtain are sleeved on spiral sleeve rods of the upper transverse connecting beam and the lower transverse connecting beam to form a unit interception net; the plurality of unit interception nets are connected end to form the whole interception net; the construction is completed by the steps of driving steel piles, assembling transverse connecting beams and the steel piles, inserting steel pipes, unfolding and fixing curtains and the like. The invention bears load through the steel pile and the steel cable, has large bearing capacity and high strength, can effectively reduce the water flow velocity of the burst dike opening, has simple construction, and can meet the emergency requirement of burst dike rescue.
Description
Technical Field
The invention relates to a dam break emergency rescue technology, in particular to an interception net for a dam break and a construction method thereof.
Background
During flood disasters, part of the dikes are soft when soaked at high water level for a long time, and the dikes are likely to burst under the action of water pressure, so that a larger disaster is caused. In history, the yellow river and the Huaihe river have dug for many times, which causes huge personnel and property loss.
The dike breach is an emergent sudden event, the disaster situation becomes more serious along with the time, and the rescue must be quickly organized. The breach is blocked and the compound dike is reinforced rapidly to control the situation to be further worsened, which is a fundamental measure. If the water flow speed of the dike breach is overlarge, thrown stone slag, stone blocks, reinforcement gabions, lead wire gabions, sand pebbles and other materials can be washed away, so that the blocking effect is greatly reduced, and construction materials are wasted. Therefore, when the dam is broken and the breach is repaired, it is necessary to take measures to reduce the water flow speed at the breach.
However, it can also be seen that such a sinking ship measure in front of the breach has a certain effect on reducing the flow rate, but has huge cost, large material consumption and certain blindness in construction, and is an indiscriminate choice in emergency situations. The urgent need is to find a rescue method for reducing the breach flow rate with less engineering quantity, less material and material consumption and high construction speed.
If an intercepting net with enough strength can be arranged in front of the breach to reduce the flow speed of the breach and replace the common ship sinking measures, the innovation and the progress of the prior art are promoted.
Disclosure of Invention
The technical scheme of the invention is as follows:
the interception net for the dike bursting mouth of the dike is characterized by comprising a plurality of steel piles, transverse connecting beams, steel pipes and curtains, wherein the middle lower part of each steel pile is provided with a mooring ring and a preformed hole, and the upper part of each steel pile is provided with a preformed hole; sleeves are arranged near two ends of the transverse connecting beam, and a row of spiral sleeve rods are welded on one side wall of the transverse connecting beam; the upper end and the lower end of the curtain are provided with sleeve holes matched with the spiral sleeve rods;
two transverse connecting beams are sequentially sleeved on the two steel piles, wherein the bottom of the lower transverse connecting beam presses a steel pile mooring ring, the upper part of the lower transverse connecting beam is limited and a supporting rod for supporting the upper transverse connecting beam is respectively inserted into the upper reserved hole and the lower reserved hole, the spiral loop bars of the two transverse connecting beams are positioned on the same side, and the upper end and the lower end of the curtain are sleeved on the spiral loop bars of the upper transverse connecting beam and the lower transverse connecting beam through loop holes to form a unit interception net; the plurality of unit interception nets are connected end to form the whole interception net.
The intercepting net for the breakwater mouth of the dam is characterized in that the bottom of the steel pile is a conical pile tip, a mooring ring and a preformed hole are arranged at the middle lower part of the steel pile from bottom to top, the mooring ring is coaxial with the steel pile, the inner wall of the mooring ring is fixed with the outer wall of the steel pile through a connecting rod, and the preformed hole is also arranged at the upper part of the steel pile; the distance between the mooring ring and the lower reserved hole is larger than twice of the height of the transverse connecting beam.
The intercepting net for the breakwater mouth of the dam is characterized in that the transverse connecting beam comprises two steel pipes which are arranged in parallel at intervals, the upper end face and the lower end face of each steel pipe are respectively welded and fixed with a row of strip-shaped steel plates, the upper row of strip-shaped steel plates and the lower row of strip-shaped steel plates are in one-to-one correspondence, sleeves are arranged near the two ends of the transverse connecting beam, and the inner diameter of each sleeve is larger than the outer diameter of a steel pile; the sleeves are welded and installed on the inner side walls of the strip-shaped steel plates on the outermost sides of the upper row and the lower row; the outer wall of one of the steel pipes of the transverse coupling beam is welded with a row of spiral loop bars along the horizontal direction, and each spiral loop bar corresponds to the strip-shaped steel plate.
The interception net for the breakwater mouth of the dam is characterized in that the curtain is made of thermoplastic materials into a rectangular flexible enclosure structure with holes, and sleeve holes matched with the spiral sleeve rods are formed in the two ends of the curtain.
The intercepting net for the breakwater mouth of the dam is characterized in that steel pipes are also inserted into gaps of the strip-shaped steel plates corresponding to the upper transverse connecting beam and the lower transverse connecting beam in the unit intercepting net, are positioned on the non-upstream side of the curtain and contact with the mud bottom during working.
A construction method of an interception net for a dike breach of a dam is characterized by comprising the following steps:
1) Assembling the transverse connecting beam and the steel pile:
the method comprises the following steps that a plurality of transverse connecting beams are sleeved on steel piles in an end-to-end manner and pressed on a mooring ring, supporting rods penetrate into two reserved holes of the steel piles and are fixed, another group of transverse connecting beams are sleeved on the steel piles in an end-to-end manner and pressed on the uppermost supporting rod, spiral sleeve rods of upper and lower rows of transverse connecting beams are positioned on the same side, sleeve holes at one end of each curtain penetrate into and are fixed on the spiral sleeve rods on the transverse connecting beams at the bottom of the steel piles, steel cables are bound on the mooring ring of each steel pile, and then each curtain is coiled and simply fixed on one side of the spiral sleeve rods on the transverse connecting beams at the bottom, so that the transverse connecting beams and the steel piles are assembled;
2) Driving the steel pile:
the assembled steel piles are transported to the upper part of the break dike mouth of the dam, the steel piles are driven into mud vertically in sequence at proper positions, one side of each transverse connecting beam with the spiral sleeve rod is positioned on the upstream side, and a structural system formed by each transverse connecting beam and the steel piles forms a half-moon cofferdam shape with a certain length above the break dike mouth; the depth of each steel pile into the soil is the distance between the pile tip and the mooring ring;
3) And inserting a steel pipe:
binding a steel cable above each steel pile, and pulling the steel cable and the steel cable bound on a mooring ring below the steel pile to a position at a certain distance away from the upstream surface of the breakwater port to lock and fix; inserting each steel pipe into the gaps of the strip-shaped steel plates corresponding to the upper row of transverse connecting beams and the lower row of transverse connecting beams, so that each steel pipe uniformly penetrates through the gaps of the upper row of transverse connecting beams and the lower row of transverse connecting beams and contacts the mud bottom;
4) Unfolding and fixing the curtain:
unwinding and gradually pulling upwards and unfolding each curtain which is shrunk and fixed below the steel pile, tightly sticking each steel pipe under the action of water flow, completely unfolding each curtain, and enabling a sleeve hole at one end of the upper part to penetrate into and be fixed on a spiral sleeve rod of each transverse connecting beam on the upper part, so that the curtain forms a barrier structure to slow down and restrict the flow rate of the water flow flowing to the opening of the bursting dam; and when the verticality of the steel pile, the reliability of the steel cable fixation, the effectiveness of slowing down the flow velocity of the water flow and the overall stability meet the requirements, the construction is finished.
The invention has the beneficial effects that:
1. the invention bears the load of the interception net through the steel piles and the fixed steel cables, has large bearing capacity and high strength, can restrain water flow with larger flow speed and water level difference, can effectively reduce the flow speed of the water flow at the mouth of the dike and provides an ideal environment for the plugging construction of the mouth of the dike;
2. the invention has the advantages of small volume and weight of each component, convenient assembly and simple construction. After the main body structure is assembled in advance before emergency, the assembled structure is only required to be driven into an emergency point during emergency, the construction speed is high, and the emergency requirement of the break embankment emergency can be met;
3. after the bursting dike mouth plugging construction is finished, according to the reverse order in the assembly process, the curtain can be taken down, the steel pipe can be pulled out, the steel cable can be untied, and the steel piles can be pulled out one by one, so that the integral dismantling is realized; each component after being dismantled can be recycled in the follow-up flood disasters.
Drawings
Fig. 1 is a schematic structural diagram of a steel pile of the present invention.
Fig. 2 is a schematic view of the structure of the transverse coupling beam of the present invention.
Fig. 3 is a schematic view of the assembly of the steel pile and the transverse connecting beam of the present invention.
FIG. 4 is a schematic view of the curtain in accordance with the present invention in its expanded configuration.
Fig. 5 is a schematic view of a cell intercepting net according to the present invention.
FIG. 6 is a schematic diagram of the completion of the steel pile construction according to the present invention.
FIG. 7 is a schematic view showing the steel pipe is sleeved into the transverse coupling beam according to the present invention.
FIG. 8 is a schematic view of the curtain of the present invention being expanded.
Fig. 9 is a schematic view of completion of the interceptor net according to the present invention.
Fig. 10 is a schematic view of the overall structure of the intercepting net of the present invention.
Description of reference numerals: 1. piling steel; 2. reserving a hole; 3. a mooring ring; 4. connecting the beams transversely; 5. a sleeve; 6. a spiral loop bar; 7. a support rod; 8. a steel pipe; 9. a curtain; 10. trepanning; 11. a hole; 12. a dam; 13. bursting an dike opening; 14. a steel cord.
Detailed Description
Referring to the drawings:
an interception net for a dam bursting mouth comprises steel piles 1, transverse connecting beams 4, steel pipes 8 and curtains 9, wherein mooring rings 3 and preformed holes 2 are arranged on the lower middle portions of the steel piles 1, the preformed holes 2 are arranged on the upper portions of the steel piles, the transverse connecting beams 4 are formed by welding two parallel steel pipes on the basis of upper and lower rows of strip-shaped steel plates, sleeves 5 are arranged near two ends of each steel pile, a row of spiral sleeve rods 6 are welded on one side of each transverse connecting beam 4, each curtain 9 is a rectangular flexible enclosure structure made of thermoplastic materials and provided with holes 11, during assembly, the transverse connecting beams 4 are firstly sleeved on each steel pile 1 and pressed on the corresponding steel pile ring 3, a supporting rod 7 is used for penetrating the two preformed holes 2 of the steel piles and fixing, the other transverse connecting beam 4 is sleeved on each steel pile 1 and pressed on the supporting rod 7 above, the spiral sleeve rods 6 of the two transverse connecting beams 4 are positioned on the same side, the steel pipes 8 are inserted into gaps of the strip-shaped steel plates corresponding to the upper and lower transverse connecting beams 4, and then upper and lower end sleeves 10 of the curtain 9 are respectively inserted and fixed on the spiral sleeve rods 6 on the upper and lower transverse connecting beams 4, and the same side of the mooring net is formed as shown in a mooring net 5.
The bottom of the steel pile 1 is a conical pile tip, the middle lower part of the steel pile 1 is provided with a mooring ring 3 and a preformed hole 2, the upper part of the steel pile 1 is provided with the preformed hole 2, and the distance between the mooring ring 3 and the lower preformed hole 2 is slightly larger than the height twice of the transverse connecting beam 4, as shown in figure 1. The mooring ring 3 is used for binding a lower steel rope 14, and the preformed hole 2 is used for penetrating and fixing the supporting rod 7. The depth of the steel pile 1 into the soil is the distance between the pile tip and the mooring ring 3. Different steel pile penetration depths can be designed according to different geological conditions. The steel piles with different sizes can be produced and manufactured for selection of actual engineering.
The transverse connecting beam 4 is formed by welding two parallel steel pipes based on upper and lower rows of strip-shaped steel plates at uniform intervals, sleeve holes 5 are formed near two ends of the transverse connecting beam 4, one row of spiral sleeve rods 6 are welded on one side of the transverse connecting beam 4, and the inner diameter of each sleeve hole 5 is larger than the pile diameter of each steel pile 1, as shown in fig. 2.
The overall structure of the transverse connecting beam 4 is symmetrically distributed, steel pipes 8 can be inserted among a plurality of rows of strip-shaped steel plates with uniform intervals, and the diameter of each steel pipe 8 is smaller than the intervals between the adjacent strip-shaped steel plates and between the parallel steel pipes; the spiral loop bar 6 is used for being sleeved into a loop hole 10 of the curtain 9. The spiral loop bar 6 is formed by spirally rotating small-diameter steel bars, and after the curtain 9 is sleeved on the spiral loop bar 6, the curtain 9 is difficult to separate from and escape from the spiral loop bar 6 under the action of the hydrodynamic pressure.
The curtain 9 is a rectangular flexible enclosure of thermoplastic material (e.g. hdpe, pvc, polypropylene, etc.) with holes 11, and the curtain 9 is provided at both ends with eyelets 10 matching the spiral rods 6, as shown in fig. 4.
The ratio of the total area of the holes 11 of the curtain 9 to the total area of the outer contour of the curtain 9 can be defined as a hole rate, the smaller the hole rate is, the better the water retaining effect of the curtain 9 is, and the larger the water pressure is; the larger the void ratio, the poorer the water-retaining effect of the curtain 9, and the smaller the water pressure it is subjected to. In the actual engineering, the proper hole rate can be selected according to the actual water flow condition, and the curtains 9 with different hole rates can be produced for field selection. Even different hole rates of the curtains 9 can be selected at different locations of the same project.
The assembly of the steel pile 1, the transverse connecting beams 4 and the steel pipes 8 is schematically shown in fig. 3, and the spiral loop bars 6 of the upper and lower transverse connecting beams 4 are located on the same side. The transverse connecting beam 4 at the bottom is pressed on the mooring ring 3 of the steel pile 1 and is limited and flexibly fixed by the support rod 7 of the preformed hole 2 at the bottom; the upper transverse connecting beam 4 presses on the supporting rod 7 of the upper preformed hole 2. The steel pipe 8 is inserted into the gaps of the strip-shaped steel plates corresponding to the upper transverse connecting beam 4 and the lower transverse connecting beam 4, the bottom of the steel pipe 8 is in contact with the mud bottom, and the length of the steel pipe 8 is larger than the distance between the upper transverse connecting beam 4 and the lower transverse connecting beam 4. Under the action of water flow, the steel pipe 8 is pressed and abutted against the steel pipe on the back side of the transverse connecting beam 4.
The whole structure of the interception net is shown in fig. 5, and the curtain 9 is fixed on the spiral loop bars 6 of the upper and lower transverse coupling beams 4. The water flow pressure acts on the curtain 9, the curtain 9 transmits the corresponding pressure to each steel pipe 8, the steel pipes 8 transmit the pressure to the steel pile 1 through the upper transverse connecting beam 4 and the lower transverse connecting beam 4, and the steel pile 1 transmits the pressure to the steel cable 14 fixed at the upper end and the lower end of the steel pile 1.
After the curtain 9 is acted by water pressure, the curtain is flexibly deformed, and a convex arc shape facing the back water surface is formed among the steel pipes 8. The curtain 9 should have sufficient strength and toughness, not produce too large deformation and rupture under the action of greater water pressure; the curtain 9 is subject to a large stress concentration at the point of contact with the screw-on stem 6, and the material strength of the curtain 9 should be such that it resists tearing. The inside and outside of the curtain 9 are provided with height scale lines which are convenient for determining the water depth, so that the water level is convenient to observe. The distance between the sleeve holes 10 at the upper end and the lower end of the curtain 9 is slightly larger than the distance between the spiral sleeve rods 6 of the upper transverse connecting beam and the lower transverse connecting beam 4; the width of the curtain 9 is larger than the distance between the adjacent steel piles 1. The main parameters of the curtain 9 are: the curtain height, width and hole rate can produce and manufacture serial curtains 9 with different combination parameters for flexible selection in practical engineering.
Preferably, the diameter of the steel pile 1 is 8 to 15cm, and the steel pile is a hollow steel pipe pile.
Preferably, the curtain 9 should be strong enough to withstand a 10m head differential without breaking or significantly deforming.
A construction method of an interception net for a breakwater mouth of a dam is described in detail as follows:
1) Assembling the transverse connecting beam and the steel pile:
the method comprises the steps of sleeving a plurality of transverse connecting beams 4 end to end on each steel pile 1 and pressing the steel piles 1 on a mooring ring 3, penetrating two reserved holes 2 of the steel piles through a supporting rod 7 and fixing the steel piles, sleeving another group of transverse connecting beams 4 end to end on each steel pile 1 and pressing the supporting rod 7 at the top, enabling spiral sleeved rods 6 of the upper transverse connecting beam 4 and the lower transverse connecting beam 4 to be located on the same side, penetrating and fixing sleeved holes 10 at one end of each curtain 9 on the spiral sleeved rods 6 of the transverse connecting beams 4 at the bottom of each steel pile 1, binding steel cables 14 on the mooring ring 3 of each steel pile 1, and then rolling and simply fixing each curtain 9 on one side of the spiral sleeved rods 6 of the transverse connecting beams 4 at the bottom, so that the transverse connecting beams and the steel piles are assembled.
The emergency rescue at the break mouth has urgency, so all components, the curtain 9, the piling equipment and other auxiliary tools in the provided interception net structure need to be stored in advance, and can be rapidly transported to the emergency scene during the flood disaster, thereby meeting the emergency requirement of the emergency rescue. After the main body structure is assembled in advance before emergency, the assembled structure is only required to be driven into an emergency point during emergency, the construction speed is high, and the emergency requirement of the break embankment emergency can be met.
2) And driving the steel pile:
and (3) transporting the assembled steel piles to the upper part of the dike break mouth of the dam, selecting proper positions to drive the steel piles 1 into mud vertically in sequence, and enabling one side of each transverse connecting beam 4 with the spiral sleeve rod 6 to be positioned on the upstream side, so that a structural system formed by each transverse connecting beam 4 and the steel piles 1 forms a half-moon cofferdam shape with a certain length above the break mouth. The depth of penetration of each steel pile 1 is the distance between the pile tip and the mooring ring 3, as shown in fig. 6.
The assembled interception net framework has enough length, so that the water flow velocity near the break dike mouth 13 of the dike 12 can be obviously restrained and reduced, and the effective protective cofferdam is formed for the break dike mouth 13.
3) And inserting a steel pipe:
and binding a steel cable 14 above each steel pile 1, and pulling the steel cable 14 bound on the mooring ring 3 below the steel pile 1 to a position with a certain distance from the upstream side of the break port for locking and fixing. Each steel pipe 8 is inserted into the gap between the strip-shaped steel plates corresponding to the upper and lower rows of transverse connecting beams 4, so that each steel pipe 8 uniformly penetrates through the gap between the upper and lower rows of transverse connecting beams 4 and contacts the mud bottom, as shown in fig. 7.
If the other side of the dike breach 13 is provided with a complete dike, each steel cable 14 can be fixed on the anchoring pile of the opposite dike; if no opposite bank is present near the dike breach 13, the cables 14 may be secured to the vessel at a distance from the breach 13. The load borne by the intercepting net is finally transmitted to each steel cable 14, so that the effective fixation of each steel cable 14 is related to the success or failure of the water flow restrained by the intercepting net, the fixation of each steel cable 14 needs to be firm and effective, and excessive deformation and failure cannot occur under the action of hydrodynamic pressure.
Before each curtain 9 is unfolded, the water pressure on the intercepting net framework is relatively small, so that the tension on each steel cable 14 is relatively small, and the difficulty in fixing each steel cable 14 is relatively small.
4) Unfolding and fixing the curtain:
and (3) unwinding and fixing each curtain 9 below the steel pile 1, gradually pulling and unfolding the curtain 9 upwards, enabling the curtain 9 to be tightly attached to each steel pipe 8 under the action of water flow, finally completely unfolding each curtain 9, and enabling the sleeve hole 10 at one end of the upper part to penetrate into and be fixed on the spiral sleeve rod 6 of each transverse connecting beam 4 of the upper part, so that the curtain 9 forms a barrier structure to slow down and restrict the flow rate of the water flow flowing to the mouth of the burst dike, as shown in fig. 8-10. And when the verticality of the steel pile 1, the reliability of fixing the steel cable 14, the effectiveness of slowing down the flow velocity of water and the overall stability meet the requirements, the construction is finished.
During the engineering, the water leakage and failure caused by the scratch and the puncture of the curtain 9 by the sharp objects should be prevented.
After the plugging construction of the bursting dam mouth is finished, the intercepting net built by the method can be dismantled. And (4) detaching the curtain 9, pulling out the steel pipes 8 one by one, removing the transverse connecting beams 4 and pulling out the steel piles 1 in the reverse order of the assembly, so that the integral dismantling is realized. Each detached fitting can be repeatedly used in the subsequent flood disasters.
The present invention is not limited to the above embodiments, and various other equivalent modifications, substitutions and alterations can be made without departing from the basic technical concept of the invention as described above, according to the common technical knowledge and conventional means in the field.
Claims (2)
1. An interception net for a breakwater mouth of a dam is characterized by comprising a plurality of steel piles, transverse connecting beams, steel pipes and curtains, wherein the middle lower part of each steel pile is provided with a mooring ring and a preformed hole, and the upper part of each steel pile is provided with a preformed hole; sleeves are arranged near two ends of the transverse connecting beam, and a row of spiral sleeve rods are welded on one side wall of the transverse connecting beam; the upper end and the lower end of the curtain are provided with trepanning matched with the spiral loop bar;
two transverse connecting beams are sequentially sleeved on the two steel piles, wherein the bottom of the lower transverse connecting beam presses a steel pile mooring ring, the upper part of the lower transverse connecting beam is limited and a supporting rod for supporting the upper transverse connecting beam is inserted into the upper reserved hole and the lower reserved hole respectively, the spiral loop bars of the two transverse connecting beams are positioned on the same side, and the upper end and the lower end of the curtain are sleeved on the spiral loop bars of the upper transverse connecting beam and the lower transverse connecting beam through loop holes to form a unit interception net; the plurality of unit interception nets are connected end to form the whole interception net;
the bottom of the steel pile is a conical pile tip, the middle lower part of the steel pile is provided with a mooring ring and a preformed hole from bottom to top, the mooring ring is coaxial with the steel pile, the inner wall of the mooring ring is fixed with the outer wall of the steel pile through a connecting rod, and the upper part of the steel pile is also provided with the preformed hole; the distance between the mooring ring and the lower reserved hole is more than twice the height of the transverse connecting beam;
the transverse connecting beam comprises two steel pipes which are arranged in parallel at intervals, the upper end face and the lower end face of each steel pipe are respectively welded and fixed with a row of strip-shaped steel plates, the upper row of strip-shaped steel plates correspond to the lower row of strip-shaped steel plates one by one, sleeves are arranged near the two ends of the transverse connecting beam, and the inner diameter of each sleeve is larger than the outer diameter of each steel pile; the sleeves are welded and installed on the inner side walls of the strip-shaped steel plates on the outermost sides of the upper row and the lower row; a row of spiral sleeve rods are welded on the outer wall of one steel pipe of the transverse connecting beam along the horizontal direction, and each spiral sleeve rod corresponds to the strip-shaped steel plate;
the curtain is made of thermoplastic materials into a rectangular flexible enclosure structure with holes, and sleeve holes matched with the spiral sleeve rods are formed in the two ends of the curtain;
steel pipes are further inserted into gaps between the strip steel plates corresponding to the upper transverse connecting beam and the lower transverse connecting beam in the unit intercepting net, are located on the non-upstream side of the curtain and are in contact with the mud bottom during working.
2. A method of constructing an interception net for a dike-break dam according to claim 1, comprising the steps of:
1) Assembling the transverse connecting beam and the steel pile:
the method comprises the following steps of pressing a plurality of transverse connecting beams which are connected end to sleeve all steel piles on a mooring ring, penetrating two reserved holes of the steel piles by using a supporting rod and fixing, pressing the other group of transverse connecting beams which are connected end to sleeve all the steel piles on the uppermost supporting rod, enabling spiral sleeve rods of upper and lower rows of transverse connecting beams to be located on the same side, penetrating and fixing sleeve holes at one end of each curtain on the spiral sleeve rods on the transverse connecting beams at the bottom of the steel piles, binding steel cables on the mooring ring of each steel pile, and then shrinking and simply fixing each curtain on one side of the spiral sleeve rods on the transverse connecting beams at the bottom, thereby completing the assembly of the transverse connecting beams and the steel piles;
2) Driving the steel pile:
the assembled steel piles are transported to the upper part of the break dike mouth of the dam, the steel piles are driven into mud vertically in sequence at proper positions, one side of each transverse connecting beam with the spiral sleeve rod is positioned on the upstream side, and a structural system formed by each transverse connecting beam and the steel piles forms a half-moon cofferdam shape with a certain length above the break dike mouth; the soil penetration depth of each steel pile is the distance between the pile tip and the mooring ring;
3) And inserting a steel pipe:
binding a steel cable above each steel pile, and pulling the steel cable and the steel cable bound on a mooring ring below the steel pile to a position at a certain distance from the upstream side of the break port for locking and fixing; inserting each steel pipe into the gaps of the strip-shaped steel plates corresponding to the upper row of transverse connecting beams and the lower row of transverse connecting beams, so that each steel pipe uniformly penetrates through the gaps of the upper row of transverse connecting beams and the lower row of transverse connecting beams and contacts the mud bottom;
4) Unfolding and fixing the curtain:
unwinding and gradually pulling upwards and unfolding each curtain which is shrunk and fixed below the steel pile, tightly sticking each steel pipe under the action of water flow, completely unfolding each curtain, and enabling a sleeve hole at one end of the upper part to penetrate into and be fixed on a spiral sleeve rod of each transverse connecting beam on the upper part, so that the curtain forms a barrier structure to slow down and restrict the flow rate of the water flow flowing to the opening of the bursting dam; and when the verticality of the steel pile, the reliability of the steel cable fixation, the effectiveness of slowing down the flow velocity of the water flow and the overall stability meet the requirements, the construction is finished.
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| CN110004959B (en) * | 2019-04-26 | 2021-04-27 | 中国葛洲坝集团第一工程有限公司 | Quick construction method and template for concrete cofferdam in flowing water environment |
| CN111704311A (en) * | 2020-05-28 | 2020-09-25 | 袁斌 | Wetland ecological ditch construction system for farmland tail water purification |
| CN112267429B (en) * | 2020-10-16 | 2023-01-24 | 湖南工程学院 | Construction method for plugging and repairing breach of dam body of bank |
| CN114293508B (en) * | 2022-01-17 | 2022-10-14 | 南京工业大学 | Earth and rockfill dam break coupling plugging structure and method |
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| FR2792661A1 (en) * | 1999-04-21 | 2000-10-27 | Jacques Victorin Armand Avias | Barrage assembly for controlling the flow of water through a channel, into and out of a main body of water and other such applications, utilizes piles driven through the bed and lower substrata supporting rotating vanes |
| CN102518084A (en) * | 2011-12-26 | 2012-06-27 | 华北水利水电学院 | Waste tyre rescue cage and waste tyre rescue cage combined dam |
| CN207079540U (en) * | 2017-05-11 | 2018-03-09 | 合肥学院 | A kind of intercept net for the mouth that inrushed for dykes and dams |
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2017
- 2017-05-11 CN CN201710328410.2A patent/CN106939581B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2792661A1 (en) * | 1999-04-21 | 2000-10-27 | Jacques Victorin Armand Avias | Barrage assembly for controlling the flow of water through a channel, into and out of a main body of water and other such applications, utilizes piles driven through the bed and lower substrata supporting rotating vanes |
| CN102518084A (en) * | 2011-12-26 | 2012-06-27 | 华北水利水电学院 | Waste tyre rescue cage and waste tyre rescue cage combined dam |
| CN207079540U (en) * | 2017-05-11 | 2018-03-09 | 合肥学院 | A kind of intercept net for the mouth that inrushed for dykes and dams |
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