CN115030114B - Natural ditch-pulling breaking method for river reservoir tributary barrier sand - Google Patents
Natural ditch-pulling breaking method for river reservoir tributary barrier sand Download PDFInfo
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- CN115030114B CN115030114B CN202210679375.XA CN202210679375A CN115030114B CN 115030114 B CN115030114 B CN 115030114B CN 202210679375 A CN202210679375 A CN 202210679375A CN 115030114 B CN115030114 B CN 115030114B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/02—Sediment base gates; Sand sluices; Structures for retaining arresting waterborne material
- E02B8/023—Arresting devices for waterborne materials
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/26—Vertical-lift gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/26—Vertical-lift gates
- E02B7/36—Elevating mechanisms for vertical-lift gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/54—Sealings for gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/04—Valves, slides, or the like; Arrangements therefor; Submerged sluice gates
- E02B8/045—Valves, slides, or the like; Arrangements therefor; Submerged sluice gates automatically movable
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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
Abstract
The invention relates to a natural ditch-pulling breaking method for a tributary barrier sand of a river reservoir, belonging to the field of hydraulic engineering, wherein the IPC classification number is E02B8/02 and E02B1/00. According to the characteristic of low scouring resistance of the tributary barrage sand and the water-binding scouring principle, the structure of an assembled water retaining barrage, a barrage sand discharging gate, a water retaining barrage gate, an assembled guide wall and the like which are distributed on the upper layer and the lower layer is built on the barrage sand sediment accumulation body, the skillful matching application of the structures is utilized to realize the selective backward flow of the low-sand-containing water body on the upper layer of the main flow at high water level, the sediment accumulation of the main flow with excessive sand water flow on the tributary is reduced, and the tributary water body is scoured at high speed in the flow passage at low water level, so that the tributary barrage Sha Pokou, the pull ditch, the tributary stock capacity excavation and the tributary stock capacity are continuously utilized, and the comprehensive benefits of the tributary reservoir in various aspects such as flood control, sediment reduction, water supply, power generation and the like are brought into full play.
Description
Technical Field
The invention relates to a method for flushing and breaking reservoir tributary barrier sand, in particular to a method for breaking natural ditches of the reservoir tributary barrier sand, belonging to the field of hydraulic engineering, wherein the IPC classification numbers of the method are E02B8/02 and E02B1/00.
Background
The dam is built to build a reservoir, so that the drop of the river channel in the reservoir area is concentrated to the dam site, the water and sand flow rate of the river channel is changed, the natural environment of the river channel flow is changed, and the river bed evolves. Such as those encountered in the official reservoirs, such as the water river barrier sand problem, and the barrier sand problem that occurs in the numerous branches of the dan jiang kou reservoirs. Particularly, in recent years, as a Huang Hexiao wave bottom water reservoir enters a sand blocking later stage, reservoirs in a yellow river flood season have to be operated at a low water level, and the side stream blocking gate sand of the reservoirs such as raised paths between fields river, large-scale river and the like block the communication between a side stream reservoir capacity and a main stream reservoir capacity, so that 3 hundred million multi-side stream reservoir capacities cannot be effectively utilized, and the problem is outstanding. The method for eliminating or destroying the reservoir tributary barrier sand is particularly urgent and needed.
At present, in order to reduce the influence of the barrier sand on the effective utilization of the tributary storage capacity of the reservoir, reservoir management units such as small wave bottoms, official halls, cudrania tricuspidata streams, danjiangkou and white stones are researched and explored for a long time and in many aspects, and main measures and technologies are concentrated in four aspects: (1) And excavating a crack measure, namely excavating a river channel on the barrier sand by utilizing a dredging machine to communicate a tributary area and a main flow area, conveying the excavated sediment to a dam bottom hole filled with a gate by utilizing a pipeline, discharging the storage area to a downstream river channel or using the excavated sediment to silt and make a beach, change the mud into the soil, maintain the river bank and the like. However, according to practical experience of small wave bottoms, official halls and cudrania stream reservoirs, sediment accumulation delta is inevitable to push and move nearby the barrage sand and sediment in a dredging groove is difficult to back-silt, and factors such as short dredging operation window time, large engineering quantity, poor construction conditions, repeated excavation and the like affect the dredging operation. (2) Optimizing reservoir dispatching, shaping precipitation scour measures, before flood in the reservoir application process sluicing, the reservoir low water level application if meet long duration big flood process, the reservoir area scour from bottom to top trace to the source scour, when the scour is developed to the tributary gate, the barrage sand can collapse along with the undercut of the main stream river channel, the retaining of tributary is discharged, the scour break of barrage sand is accelerated. However, due to the fact that the long-duration large flood process is difficult to obtain, the width of the tributary barrier sand is large, the reservoir cannot be required to be operated at a low water level or at a low water level frequently for a long time due to water resource utilization, adverse effects of the barrier sand are difficult to effectively break through by the aid of the measures according to the recent application conditions and experiences of the low-wave-bottom water reservoir, and the problem of the tributary barrier sand cannot be thoroughly solved. (3) The construction of a breakwater (sand guide dike) scheme is a treatment scheme for preventing communication between a water river reservoir and a permanently fixed river reservoir by the official reservoir and further generating siltation in a dredging river channel, and mainly aims to force incoming water and incoming sand to change a flow path to enter the water river reservoir or the permanently fixed river reservoir, guide the in-storage sediment into the dead reservoir capacity of the water river reservoir as much as possible in the future to slow down the siltation before the dam, the actual running condition does not reach the expected aim, the dredging river channel between the water river reservoir and the permanently fixed river reservoir still generates siltation, and the barrier sand continuously develops without fundamentally solving the problem of effective utilization of the reservoir capacity of the water river reservoir. (4) The branch construction water storage engineering measures are one assumption that the yellow river water conservancy science institute utilizes a physical model and a mathematical model to study the collapse of the small wave bottom reservoir raised paths between fields river barrage, and have no specific and operable construction scheme, if a conventional dam repairing construction scheme is adopted, the environment, geology and other aspects of demonstration analysis are required, and the method is not adopted and implemented by the small wave bottom administration at present, so that the method has the defects of large investment, long construction period, unreasonable investment benefit and the like even in future implementation. The method comprehensively analyzes the achievement and application requirements of the various solutions, so that the prior reservoir tributary barrage sand treatment is lack of reliable and effective measures and technologies, a new path must be developed fundamentally to solve the problem, and a new mode and method are explored.
Disclosure of Invention
The invention provides a safe and reliable river reservoir barrier sand breaking method with low construction cost, aiming at solving the defects in the existing river reservoir tributary barrier sand breaking technology. The technical scheme of the invention is as follows:
a natural ditch breaking method for a tributary barrage of a river reservoir comprises a construction stage and an operation stage of a natural ditch breaking system for the barrage of the barrage:
the construction stage of the natural ditch-pulling and breaking system of the barrier sand is as follows: when the reservoir is operated at a low water level and the tributary barrage sand is exposed out of the water surface, a natural barrage ditch breaking system is constructed;
the natural ditch breaking system for the barrier sand comprises an assembled water-retaining and sand-blocking dam, a gate, an assembled guide wall, an assembled gate middle pier and a movable crane;
the assembled water-retaining and sand-blocking dam is arranged on a barrier sand siltation body at the junction of a tributary and a main stream and consists of two rows of prestressed hollow row piles, a sand filling work bag and a high-strength lacing wire belt; the prestressed hollow row piles are prefabricated reinforced concrete hollow square piles, and are inserted into the sediment of the barrier sand in a high-pressure water jet mode; arranging a plurality of layers of sand filling geotechnical bags between two rows of prestressed hollow row piles, wherein the sand filling geotechnical bags are filled by a sand dredger nearby for conveying sediment; the high-strength lacing wire belts are arranged at different heights of the two rows of hollow row piles, the two rows of hollow row piles are fixed in a opposite pulling mode, and the hollow row piles are prevented from being toppled over due to extrusion of the sand filling work bags;
the assembled guide wall and the assembled gate middle pier are prefabricated reinforced concrete hollow square piles, and are inserted into a blocking sand siltation body in a high-pressure water injection mode, and a supporting beam is arranged between the assembled guide wall and the assembled gate middle pier;
the gate is divided into an upper part and a lower part, and comprises a sand blocking and sand discharging gate at the lower part and a water blocking and sand blocking gate at the upper part, wherein the sand blocking and sand discharging gate and the water blocking and sand blocking gate are arranged at intervals front and back, the sand blocking and sand discharging gate is positioned at the upstream side of the water blocking and sand blocking gate, and a gap between the sand blocking and sand blocking gate and the water blocking and sand blocking gate is provided with a blocking stop beam gate; the sand blocking and discharging gate and the water blocking and sand blocking gate are both stop log gates and are composed of a plurality of stop log gate plates; the bottom of the water-retaining and sand-blocking gate is located on a siltation riverbed, the bottom of the water-retaining and sand-blocking gate is located on a supporting square pile, and the supporting square pile is located in a gate slot of the water-retaining and sand-blocking gate;
the hollow row piles, the assembled guide wall and the top of the pier in the assembled gate are provided with crane rails, and the movable crane is arranged on the crane rails and is used for transferring the stop log flashboard and plugging the stop log flashboard.
(II) operation stage:
(1) Before the reservoir recovers the water storage application state and the reservoir water level rises to the top elevation of the assembled water retaining and sand blocking dam, sequentially hoisting a stop log gate of the sand blocking and sand discharging gate, and blocking the stop log gate and the stop log gate of the water retaining and sand blocking gate by using a mobile crane to finish the gate closing operation of the sand blocking and sand discharging gate and the water retaining and sand blocking gate; then, evacuating the mobile crane;
(2) The reservoir water level is continuously raised, the low-sand-content water body on the upper layer of the main flow overflows the top of the assembled water retaining and sand blocking dam, the overflow flows backward, the water levels of the main flow reservoir and the branch flow reservoir are synchronously raised to the water level of the reservoir, and the sand blocking and sand discharging gate and the water retaining and sand blocking gate are kept in a closed state;
(3) The method comprises the steps that a reservoir water discharge and storage is carried out before flood, the reservoir is used at a low water level, the dam tops of the assembled water retaining and sand blocking dams are exposed out of the water surface, and a mobile crane enters the assembled guide wall and the tops of middle piers of the assembled gate; when the branch water level is higher than the main water level, the movable crane lifts up all the stop beam flashboard of the water retaining and sand blocking gate and the blocking stop beam flashboard, the water retaining and sand blocking gate is opened, the branch water body passes through an overflow channel formed by the assembled guide wall, and the water is used for flushing deposited sediment in the channel; until the deposited sediment near the stoplog flashboard at the upper part of the sand-blocking and sand-discharging gate is washed away, the lifting resistance of the stoplog flashboard of the sand-blocking and sand-discharging gate is reduced, the crane is moved to lift the stoplog flashboard of the sand-blocking and sand-discharging gate, and the stoplog flashboard of the lifted sand-blocking and sand-discharging gate is placed in a gate slot of the water-blocking and sand-discharging gate; the tributary water flows out along a sluice hole through the sand blocking and discharging gate, the sediment is deposited in a high-speed flushing channel, and the sluice gate sand is flushed and destroyed by extending a pull ditch towards the upstream and downstream, so that the sediment storage capacity of the main branch is communicated without obstacle and the water level of the main branch is synchronously lifted under the low-water-level operation condition of the reservoir;
(4) Before the reservoir recovers the water storage operating state and the reservoir water level begins to rise, lifting a stop log flashboard of a sand blocking and sand discharging gate which is lifted in advance in a gate slot of the water blocking and sand discharging gate by using a mobile crane into the gate slot of the sand blocking and sand discharging gate, and then sequentially lifting the stop log flashboard and the stop log flashboard of the water blocking and sand discharging gate to finish the gate closing operation of the sand blocking and sand discharging gate and the water blocking and sand discharging gate; then, evacuating the mobile crane; this step should be completed before the reservoir level rises to the elevation of the top of the assembled water and sand dam.
Further, the support square pile is arranged in a gate groove of the water retaining and sand blocking gate by adopting a high-pressure water jet method.
The invention has the following technical effects:
(1) According to the natural ditch breaking method for the branch flow barrage of the river reservoir, provided by the invention, the characteristics of low scouring resistance of the branch flow barrage, the water retaining and sand discharging gates distributed on the upper layer and the lower layer, the assembled diversion wall and other structures are built on the barrage sand sediment accumulation body according to the characteristics of low scouring resistance of the branch flow barrage and the water binding and scouring principle, the ingenious matching application of the structures is utilized, the main flow upper layer low sand-containing water body is utilized to selectively pour the branch flow at high water level, the accumulation of the main flow multiple sand water flow on the branch flow is reduced, the branch flow sediment is flushed through the sediment in the flow channel at high speed at low water level, so that the branch flow gates Sha Pokou and the ditches are formed, the branch flow storage capacity is excavated, the branch flow storage capacity is utilized permanently, and the comprehensive benefits of the aspects such as flood prevention, sediment reduction, water supply and the like of the reservoir are exerted to the maximum extent.
(2) The natural ditch-pulling and breaking method for the barrier sand adopted by the breaking method has the main structure comprising a dam body, a stop log type gate, a guide wall and a gate middle pier, which are all assembled structures, adopts construction operation modes such as hydraulic pile insertion, hydraulic filling and the like, takes water and sand locally, can be quickly constructed and completed in a shorter operation window period, has the advantages of simple structure, convenient operation, flexibility, safety and reliability, can controllably wash the ditches by utilizing the natural hydraulic force to the maximum extent, damages and penetrates through the barrier sand siltation body, has small investment, takes effect quickly, is once and forever, and has high popularization and application value.
Drawings
FIG. 1 is a plan view of a natural trench-tie breaker system for a barrier sand employed in accordance with the present invention;
FIG. 2 is a right side elevation view of FIG. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is a plan view of the structure of a lock chamber of the natural trench-pulling system for a barrier sand employed in the present invention;
fig. 5 is a B-B cross-sectional view of the chamber structure of fig. 4.
In the figure, a sand blocking and sand discharging gate 1, a water retaining and sand blocking gate 2, an assembled guide wall 3, a prestressed hollow row pile 4, an assembled gate middle pier 5, a support beam 6, a sand filling geotechnical bag 7, a stoplog gate 8, a movable crane 9, a crane track 10, a lifting lug 11, a blocking stoplog gate 12, a support square pile 13 and a high-strength lacing wire belt 14.
Detailed Description
The method for breaking the natural ditch of the river reservoir tributary barrier sand is described in detail below with reference to fig. 1-5.
A natural ditch breaking method for a tributary barrage of a river reservoir comprises a construction stage and an operation stage of a natural ditch breaking system for the barrage of the barrage:
the construction stage of the natural ditch-pulling and breaking system of the barrier sand is as follows: when the reservoir is operated at a low water level and the tributary barrage sand is exposed out of the water surface, a natural barrage ditch breaking system is constructed;
the natural ditch breaking system for the barrier sand comprises an assembled water and sand blocking dam, a gate, an assembled guide wall 3, an assembled gate middle pier 5 and a movable crane 9;
the assembled water retaining and sand blocking dam is arranged on a barrage sand siltation body at the junction of a tributary reservoir and a dry-flow river channel and consists of two rows of prestressed hollow row piles 4, sand filling geotechnical bags 7 and high-strength lacing wires 14, the prestressed hollow row piles 4 are prefabricated reinforced concrete hollow square piles, the length is mainly determined according to the barrage sand siltation thickness change, the selectable length is 3.0-40.0 m, the cross section is mainly determined according to the retaining height and construction requirements, and the prefabricated reinforced concrete hollow square piles with the length of 0.6x0.6m are adopted in the embodiment, and the prefabricated reinforced concrete hollow square piles are inserted into the barrage sand siltation body in a high-pressure water jetting mode. The sand filling geotechnical bags 7 are arranged between the two rows of prestressed hollow row piles 4 in multiple layers, the sand filling geotechnical bags 7 can be of multiple specifications, the large geotechnical bags with the diameters of 1.0m and the lengths of 30.0m are adopted in the embodiment, sand is nearly conveyed by a sand dredger to fill, the high-strength lacing wires 14 are arranged at different heights of the two rows of hollow row piles 4, the two rows of hollow row piles 4 are fixed in a pulling mode, and the hollow row piles 4 are prevented from being toppled over due to extrusion of the sand filling geotechnical bags 7.
The assembled guide wall 3 and the assembled gate middle pier 5 are prefabricated reinforced concrete hollow square piles and inserted into the sediment accumulation body of the barrier sand in a high-pressure water injection mode. And a supporting beam 6 is arranged between the assembled guide wall 3 and the middle pier 5 of the assembled gate.
The gate is divided into an upper part and a lower part, and comprises a sand blocking and sand discharging gate 1 at the lower part and a water blocking and sand blocking gate 2 at the upper part, wherein the sand blocking and sand discharging gate 1 and the water blocking and sand blocking gate 2 are not positioned on the same plane and are arranged at intervals front and back, the sand blocking and sand discharging gate 1 is positioned at the upstream side of the water blocking and sand blocking gate 2, and a gap between the sand blocking and sand blocking gate 1 and the water blocking and sand blocking gate 2 is provided with a blocking stop log gate 12. The sand blocking and discharging gate 1 and the water blocking and sand blocking gate 2 are both stop log gates and are composed of a plurality of stop log gate plates 8. The bottom of the sand blocking and discharging gate 1 is located on a siltation riverbed, the bottom of the water blocking and sand blocking gate 2 is located on a supporting square pile 13, and the supporting square pile 13 is arranged in a gate groove of the water blocking and sand blocking gate 2 by adopting a high-pressure water jetting method to set depth.
The hollow row piles 4, the assembled guide wall 3 and the top of the pier 5 in the assembled gate are provided with crane rails 10, and the movable crane 9 is arranged on the crane rails 10 and is used for transferring the stoplog flashboard 8 and plugging the stoplog flashboard 12. The crane rail 10 is arranged at the dam crest of the assembled water-retaining and sand-blocking dam, and provides an entering or withdrawing passage for the mobile crane 9.
(II) operation stage:
(1) Before the reservoir recovers the water storage application state and the reservoir water level rises to the top elevation of the assembled water and sand blocking dam, sequentially hoisting a stop log gate 8 of the sand blocking and sand discharging gate 1, a stop log gate 12 and the stop log gate 8 of the water and sand blocking gate 2 by using a movable crane 9 to finish the closing operation of the sand blocking and sand discharging gate 1 and the water and sand blocking gate 2; then, the mobile crane 9 is evacuated;
(2) The reservoir water level is continuously raised, the low-sand-containing water body on the upper layer of the main flow overflows the top of the assembled water retaining and sand blocking dam, the overflow flows backward, the water levels of the main flow reservoir and the branch flow reservoir are synchronously raised to the water level of the reservoir, and the sand blocking and sand discharging gate 1 and the water retaining and sand blocking gate 2 keep a closed state;
(3) The reservoir is used for discharging water, leaving a reservoir to face flood, the reservoir is used at a low water level, the dam top of the assembled water retaining and sand blocking dam is exposed out of the water surface, and a mobile crane 9 enters the top of the assembled guide wall 3 and the top of the middle pier 5 of the assembled gate; when the branch water level is higher than the main water level, the movable crane 9 lifts up all the stop beam flashboard 8 of the water retaining and sand blocking gate 2 and the blocking stop beam flashboard 12, the water retaining and sand blocking gate 2 is opened, the branch water body passes through an overflow channel formed by the assembled guide wall 3, and the water is used for flushing deposited sediment in the channel; until the deposited silt near the stoplog flashboard 8 at the upper part of the sand-blocking sand-discharging gate 1 is washed away, the lifting resistance of the stoplog flashboard 8 of the sand-blocking sand-discharging gate 1 is reduced, the crane 9 is moved to lift the stoplog flashboard 8 of the sand-blocking sand-discharging gate 1, and the stoplog flashboard 8 of the lifted sand-blocking sand-discharging gate 1 is placed in a gate slot of the water-blocking sand-blocking gate 2; the tributary water flows out along a sluice hole through the sand blocking and discharging gate 1, sediments are deposited in a high-speed flushing channel, and the gate sand is flushed and destroyed by extending a pull ditch towards the upstream and downstream, so that the sediment storage capacity of the main branch is not blocked and the water level of the main branch is synchronously lifted under the low-water-level operation working condition of the reservoir;
(4) Before the reservoir recovers the water storage operating state and the water level of the reservoir begins to rise, lifting a stop-beam flashboard 8 of a sand blocking and sand discharging gate which is firstly lifted in a gate slot of a water blocking and sand blocking gate 2 to the gate slot of the sand blocking and sand discharging gate 1 by utilizing a movable crane 9, and then sequentially lifting the blocking stop-beam flashboard 12 and the stop-beam flashboard 8 of the water blocking and sand blocking gate 2 to finish the closing operation of the sand blocking and sand discharging gate 1 and the water blocking and sand blocking gate 2; then, the mobile crane 9 is evacuated. This step should be completed before the reservoir level rises to the elevation of the top of the assembled water and sand dam.
Claims (2)
1. A natural ditch breaking method for a tributary barrage of a river reservoir is characterized by comprising the construction stage and the operation stage of a natural ditch breaking system for the barrage of the barrage:
the construction stage of the natural ditch-pulling and breaking system of the barrier sand is as follows: when the reservoir is operated at a low water level and the tributary barrage sand is exposed out of the water surface, a natural barrage ditch breaking system is constructed;
the natural ditch breaking system for the barrier sand comprises an assembled water retaining and sand blocking dam, a gate, an assembled guide wall (3), an assembled gate middle pier (5) and a movable crane (9);
the assembled water retaining and sand blocking dam is arranged on a blocking gate sand siltation body at the junction of a tributary and a main stream and consists of two rows of prestressed hollow row piles (4), sand filling geotechnical bags (7) and high-strength lacing wire belts (14); the prestressed hollow row piles (4) are prefabricated reinforced concrete hollow square piles, and are inserted into the sediment of the barrier sand in a high-pressure water jet mode; a plurality of layers of filling Sha Tugong bags (7) are arranged between two rows of prestressed hollow row piles (4), and the filling Sha Tugong bags (7) are filled by a dredger for nearby sediment transportation; the high-strength lacing wire belts (14) are arranged at different heights of the two rows of the prestressed hollow row piles (4), the two rows of the prestressed hollow row piles (4) are oppositely pulled and fixed, and the prestressed hollow row piles (4) are prevented from being toppled over due to extrusion of the Sha Tugong bags (7);
the assembled guide wall (3) and the assembled gate middle pier (5) are prefabricated reinforced concrete hollow square piles, the prefabricated reinforced concrete hollow square piles are inserted into a blocking sand siltation body in a high-pressure water injection mode, and a supporting beam (6) is arranged between the assembled guide wall (3) and the assembled gate middle pier (5);
the gate is divided into an upper part and a lower part, and comprises a sand blocking and sand discharging gate (1) at the lower part and a water blocking and sand blocking gate (2) at the upper part, wherein the sand blocking and sand discharging gate (1) and the water blocking and sand blocking gate (2) are arranged at intervals front and back, the sand blocking and sand discharging gate (1) is positioned at the upstream side of the water blocking and sand blocking gate (2), and a gap between the sand blocking and sand blocking gate and the water blocking gate is provided with a blocking stack gate (12); the sand blocking and discharging gate (1) and the water blocking and sand blocking gate (2) are both stop log gates and are composed of a plurality of stop log gate plates (8); the bottom of the sand blocking and discharging gate (1) is located on a siltation river bed, the bottom of the water blocking and sand discharging gate (2) is located on a supporting square pile (13), and the supporting square pile (13) is located in a gate slot of the water blocking and sand discharging gate (2);
the top of the prestressed hollow row piles (4), the assembled guide wall (3) and the assembled gate middle pier (5) is provided with a crane track (10), and the movable crane (9) is arranged on the crane track (10) and is used for transferring the stoplog flashboard (8) and the plugging stoplog flashboard (12);
(II) operation stage:
(1) Before the reservoir recovers the water storage operating state and the reservoir water level rises to the top elevation of the assembled water and sand blocking dam, sequentially hoisting a stoplog flashboard (8) of the sand blocking and sand discharging gate (1), a stoplog flashboard (12) for blocking and the stoplog flashboard (8) of the water and sand blocking gate (2) by utilizing a mobile crane (9), so as to finish the gate closing operation of the sand blocking and sand discharging gate (1) and the water and sand blocking gate (2); then, evacuating the mobile crane (9);
(2) The reservoir water level is continuously raised, the low-sand-content water body on the upper layer of the main flow overflows the top of the assembled water retaining and sand blocking dam, the overflow flows backward, the water level of the main flow reservoir and the water level of the branch flow reservoir are synchronously raised to the water level of the reservoir, and the sand blocking and sand discharging gate (1) and the water retaining and sand blocking gate (2) are kept in a closed state;
(3) The reservoir is used for discharging water, leaving a reservoir to face flood, the reservoir is used at a low water level, the dam top of the assembled water retaining and sand blocking dam is exposed out of the water surface, and a mobile crane (9) enters the top of the assembled guide wall (3) and the top of the assembled gate middle pier (5); when the branch water level is higher than the main water level, the movable crane (9) lifts up all the stop beam flashboard (8) of the water retaining and sand blocking gate (2) and the blocking stop beam flashboard (12), the water retaining and sand blocking gate (2) is opened, a branch water body passes through a flow passage formed by the assembled guide wall (3), and the water is used for flushing deposited sediment in the flow passage; until the deposited silt near the stoplog flashboard (8) at the upper part of the sand blocking and sand discharging gate (1) is washed away, the lifting resistance of the stoplog flashboard (8) of the sand blocking and sand discharging gate (1) is reduced, a crane (9) is moved to lift the stoplog flashboard (8) of the sand blocking and sand discharging gate (1), and the stoplog flashboard (8) of the lifted sand blocking and sand discharging gate (1) is placed in a gate slot of the water blocking and sand discharging gate (2); the tributary water flows out along a sluice hole through the sand blocking and discharging gate (1), sediment is deposited in a high-speed flushing channel, and the gate sand is flushed and destroyed by extending a pull ditch towards the upstream and downstream, so that the sediment storage capacity of the main branch is free from being penetrated and the water level of the main branch is synchronously lifted under the low-water-level operation working condition of the reservoir;
(4) Before the reservoir recovers the water storage operating state and the reservoir water level begins to rise, lifting a stop beam flashboard (8) of a sand blocking and sand discharging gate which is firstly lifted in a gate slot of a water blocking and sand discharging gate (2) to the gate slot of the sand blocking and sand discharging gate (1) by utilizing a mobile crane (9), and then sequentially lifting the blocking stop beam flashboard (12) and the stop beam flashboard (8) of the water blocking and sand discharging gate (2) to finish the closing operation of the sand blocking and sand discharging gate (1) and the water blocking and sand discharging gate (2); then, evacuating the mobile crane (9); this step should be completed before the reservoir level rises to the elevation of the top of the assembled water and sand dam.
2. The method for breaking the natural ditches of the tributary barrage of the river reservoir according to claim 1, wherein the supporting square piles (13) are arranged in the gate grooves of the water retaining and barrage gate (2) by adopting a high-pressure water jet method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN102251498A (en) * | 2011-04-20 | 2011-11-23 | 上海河口海岸科学研究中心 | New method for reducing silt of large and medium tidal range river mouth bar sand section channel |
| CN206512684U (en) * | 2017-03-02 | 2017-09-22 | 南京市市政设计研究院有限责任公司 | A kind of spit of fland step type with sand discharge function blocks mill weir |
| CN206625198U (en) * | 2017-04-01 | 2017-11-10 | 周文星 | A kind of hydraulic engineering sand-trap water-take gate |
| CN111305162A (en) * | 2020-03-20 | 2020-06-19 | 扬州大学 | Rope type integral transverse-pulling stoplog ecological water intake gate and operation method thereof |
| CN213173597U (en) * | 2020-08-18 | 2021-05-11 | 银川中铁水务集团有限公司 | Bidirectional water inlet bucket |
| CN216586443U (en) * | 2021-12-31 | 2022-05-24 | 安徽尧舜建设有限公司 | Dam gate sediment outflow device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITTO20130200A1 (en) * | 2013-03-15 | 2014-09-16 | Aronne Armanini | STRUCTURE OF RETENTION OF SEDIMENTS IN WATER COURSES |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251498A (en) * | 2011-04-20 | 2011-11-23 | 上海河口海岸科学研究中心 | New method for reducing silt of large and medium tidal range river mouth bar sand section channel |
| CN206512684U (en) * | 2017-03-02 | 2017-09-22 | 南京市市政设计研究院有限责任公司 | A kind of spit of fland step type with sand discharge function blocks mill weir |
| CN206625198U (en) * | 2017-04-01 | 2017-11-10 | 周文星 | A kind of hydraulic engineering sand-trap water-take gate |
| CN111305162A (en) * | 2020-03-20 | 2020-06-19 | 扬州大学 | Rope type integral transverse-pulling stoplog ecological water intake gate and operation method thereof |
| CN213173597U (en) * | 2020-08-18 | 2021-05-11 | 银川中铁水务集团有限公司 | Bidirectional water inlet bucket |
| CN216586443U (en) * | 2021-12-31 | 2022-05-24 | 安徽尧舜建设有限公司 | Dam gate sediment outflow device |
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