Ice-blocking structure for water conveyance main channel

Abstract

The present invention discloses an ice-blocking structure for a water conveyance main channel, comprising an ice-blocking inclined cable, a shore-based chute, a movable mooring pile and a mooring pile stopper. The shore-based chute is fixed on the horseway on both sides of the water conveyance main channel, and a plurality of ice-blocking inclined cables are connected across the water conveyance main channel between the two shore-based chutes. Both ends of each ice-blocking inclined cable are connected to the shore-based chute through a movable mooring pile and form a sliding cooperation relationship therewith. The sliding direction of the movable mooring pile is the same as the water flow direction; the mooring pile stopper is detachably connected to the shore-based chute, and is used to limit the movable mooring pile in the water flow direction; the angle between each ice-blocking inclined cable and the water flow direction on the horizontal plane is an acute angle or an obtuse angle. The present invention has the characteristics of large ice-blocking load, high safety, and adaptive adjustment. It can not only directly provide safety protection for the control facilities on the downstream channel, but also indirectly improve the water conveyance efficiency of the water conveyance main channel, and has significant social and economic benefits.

Description

Technical Field

[0001] The invention relates to the field of water conservancy and water affairs engineering, and in particular to an ice-blocking structure for a water conveyance main channel. Background Art

[0002] The main water conveyance canal, especially the artificial water conveyance canal, such as the main water conveyance canal of the central line project, conveys water by gravity from south to north, and has the characteristics of wide artificial canals (80m-120m) and long distances (over 1200km). Due to the long distance and the latitude from 33° to 40°, freezing occurs almost every year in the north of the Yellow River in the water conveyance canal. At present, the water conveyance under the ice cover is used for the central line water conveyance canal during the ice period, and the safety measure is to use ice cables. In this way, the water conveyance efficiency during the ice period is about half of the normal time. In actual operation, due to reasons such as flow rate, it is difficult to form an ice cover, which is easy to form disasters such as ice jams and ice dams, and the actual water conveyance volume is seriously low. In addition, the freezing of the water conveyance canal will bring serious safety hazards to control facilities such as gates, and even cause permanent damage. During many years of actual operation, due to the single form of ice-blocking cables and the lack of other effective means of load-protecting structures except releasing cables, cable breakage often occurs, causing a "Wu Kaihe" in the actual sense, which seriously threatens the safety of the foundation and functional facilities of the water supply main channel. Summary of the invention

[0003] The present invention aims to overcome the shortcomings of the above-mentioned existing technical solutions and proposes an ice-blocking structure for a water conveyance main channel. The present invention has the characteristics of large ice-blocking load, high safety, and adaptive adjustment. It can not only directly provide safety protection for the control facilities on the downstream channel, but also indirectly improve the water conveyance efficiency of the water conveyance main channel, and has significant social and economic benefits.

[0004] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0005] A water conveyance main channel ice-blocking structure, comprising an ice-blocking inclined cable, a shore-based chute, a movable mooring pile and a mooring pile limiter, the shore-based chute is fixed on the horseway on both sides of the bank of the water conveyance main channel, and a plurality of ice-blocking inclined cables are connected across the water conveyance main channel between two shore-based chutes, and both ends of each ice-blocking inclined cable are connected to the shore-based chute through the movable mooring pile and form a sliding cooperation relationship therewith, and the sliding direction of the movable mooring pile is the same as the water flow direction; the mooring pile limiter is detachably connected to the shore-based chute, and is used to limit the movable mooring pile in the water flow direction; the angle between each ice-blocking inclined cable and the water flow direction on the horizontal plane is an acute angle or an obtuse angle, so that the distance between two adjacent ice-blocking inclined cables increases or decreases along the vertical water flow direction, and the distance between two adjacent ice-blocking inclined cables increases along the water flow direction.

[0006] Preferably, a semi-submersible buoy is provided on each of the ice-blocking cables.

[0007] Furthermore, the inner diameters of the semi-submersible floating bodies on the plurality of ice-blocking longitudinal and oblique cables increase gradually along the direction of water flow.

[0008] Preferably, a plurality of ice-blocking longitudinal cables are connected between every two adjacent ice-blocking longitudinal oblique cables, the extension direction of the ice-blocking longitudinal cables is the same as the direction of water flow, and the ice-blocking longitudinal oblique cables and the ice-blocking longitudinal cables together form a mesh cable structure.

[0009] Preferably, the angle between each of the ice-blocking inclined cables and the water flow direction on the horizontal plane is set to α, 65°<α<90° or 90°<α<125°.

[0010] Preferably, the basic chute is an integral steel structure, which can withstand a load of 10t to 20t from the ice-blocking cable at a single point, and the unidirectional load of the integral steel structure can reach 100t.

[0011] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0012] The present invention adopts a design structure of floating ice-blocking cables arranged unequally along the water flow direction and with increasing inner diameters, and utilizes the natural characteristics of ice caps and ice dams when the channel is frozen to achieve layered and timed load bearing and absorption of channel ice bodies. It can layer and progressively block the movement / flow of ice bodies in the channel in a meshed, increasing inner diameter of floating cables and combined load bearing manner, thereby achieving graded absorption and load bearing. The ice-blocking method using this method not only has a large overall load, but also can ensure the safety of the ice-blocking cable (group) itself under the most severe ice-blocking stress conditions through the combined load bearing method.

[0013] The safe ice-blocking method with unequally spaced increasing water surface heights of floating bodies of the present invention is applicable to open water conveyance main canal structures such as deep excavated and high-filled water conveyance main canals; the present invention can not only provide a large-load ice-blocking structure, but also effectively ensure the force safety and structural stability of the ice-blocking structure itself, effectively control the ice conditions in the water conveyance main canal, prevent the damage of floating ice and ice cover to the water conveyance main canal facilities, and indirectly improve the water conveyance efficiency of the water conveyance main canal, with significant social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the planar layout structure of a certain embodiment of the present invention.

[0015] Figure 2 for Figure 1 Schematic cross-section diagram.

[0016] Figure numerals: 1-water conveyance main channel; 2-horseway; 3-water level line; 4-ice-blocking inclined cable; 5-foundation chute; 6-movable mooring pile; 7-mooring pile limiter; 8-semi-submersible buoy; 9-ice-blocking longitudinal cable. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for exemplary description and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known ice-blocking structures for water conveyance main channels and their descriptions in the drawings may be omitted. The positional relationship described in the drawings is only used for exemplary description and cannot be understood as a limitation on this patent.

[0018] Combine the following Figure 1-2 Taking the central line water diversion and water supply main canal as an example (other open water diversion and water supply channels are analogous), the main principles and processes of the patent of this invention are as follows.

[0019] The device of the present invention is only used when the water supply main channel freezes during the ice period and may cause ice damage, and ice blocking is required. The channel is generally an artificial concrete lined flow channel with no cover on top. There are generally horseways (concrete or asphalt pavement) on both sides of the lined channel for running inspections and transporting and repairing equipment. There are generally buffer protection forest belts on both sides of the horseway for closed management and ensuring water quality safety.

[0020] First, the basic chute 5 is arranged along the horseways 2 on both sides of the water supply main channel 1 near the inner side of the water supply main channel 1. The basic chute 5 adopts a similar channel steel structure with a length of 5m to 20m and is fixed and stressed by anchors or fixed pile anchors. The basic chute 5 is an integral steel structure with high rigidity. It can withstand a load (tension) of 10t to 20t from the ice-blocking cable at a single point, and the unidirectional load of the entire component (tension from the channel side) can reach 100t.

[0021] The foundation chute can be fixed by anchoring or anchor piles, and the anchoring and baiting foundation can be the supporting piles or other foundation structural members on the slope of the water conveyance main channel 1. When anchoring piles are used for fixing, the corresponding foundation is pre-buried under the chute, and anchor bolts are reserved to form a solid shore foundation force structure.

[0022] Secondly, a group of movable mooring piles 64 are arranged in the foundation chute (symmetrically arranged on both sides of the channel), and the movable mooring piles 6 on both sides of the channel are connected with the ice-blocking inclined cable 4. The movable mooring piles 6 are moved in the foundation chute in an embedded manner, and can be fixed in position and bear loads by the mooring pile limiters 7. The foundation chute and the movable mooring piles are the key to the present invention, that is, the inclination angle and indirectness of the ice-blocking inclined cable can be adjusted according to the amount of ice coming and the corresponding ice-blocking load, thereby changing the force distribution of the ice-blocking inclined cable, avoiding force concentration and excessive local load, thereby greatly increasing the ice-blocking capacity of the ice-blocking inclined cable system while ensuring the safety of the ice-blocking inclined cable.

[0023] The same number of mooring pile limiters 7 (4 groups) as the number of ice-blocking inclined cables 4 are set in the basic chute to limit the position of the ice-blocking inclined cables 4 in the chute to lock the position of the ice-blocking inclined cables 4 in the chute. At the same time, the positioning in the chutes on both sides of the channel can cooperate with each other so that the ice-blocking cables have an angle α with the water flow direction greater than or less than 90° (such as: 65°<α<90°, 90°<α<125°) when viewed from the plane, that is, non-vertical to the water flow direction. In this example, from the front to the back along the water flow direction, the angles of the 4 groups of ice-blocking inclined cables 4 with the horizontal line (vertical to the water flow direction) are 10°, 20°, 25°, and 35° respectively. The above angle combination makes the ice-blocking inclined cables 4 have good adjustability and adaptability, can effectively reduce the frontal impact force of ice blocks on the ice-blocking inclined cables 4 in the water flow direction, help to unload the force, and the force condition of the ice-blocking inclined cables 4 is better.

[0024] Finally, the spacing between the ice-blocking inclined cables 4 and the floating bodies (the inner diameter increases in sequence along the water flow direction) can also be conveniently adjusted through the foundation chutes and mooring pile limiters 7 on both sides of the channel. The spacing is unequal due to the angles (10°, 20°, 25°, and 35°, respectively) between the above-mentioned 4 groups of ice-blocking inclined cables and the horizontal line (vertical to the water flow direction), so that the spacing between two adjacent ice-blocking inclined cables 4 increases in the vertical water flow direction (from left to right), and the spacing between two adjacent ice-blocking inclined cables 4 increases in the water flow direction. (The unequal spacing design feature corresponds to the small increasing inner diameters of the floating bodies of each layer of ice-blocking cables, which has a special effect and is particularly suitable for the ice conditions of open dry channels with a certain dynamic flow. It can well match the ice load, and evenly bear the ice load with different inner diameters and unequal spacing of the floating bodies).

[0025] A semi-submersible floating body is arranged on the ice-blocking inclined cable 4 of the movable mooring pile 6 connecting the two sides of the channel slope of the water supply main channel 1. In this example, a round solid wood body is used, and the floating bodies are connected by steel cables to form a chain-like ice-blocking cable structure. Each group of ice-blocking cables is connected by an ice-blocking longitudinal cable 9 (following the water flow direction) in the form of a steel cable, and its length can be shortened or extended according to the horizontal angle of each group of ice-blocking cables in the water supply main channel 1 and the unequal front and rear spacing arrangement (similar to the principle of string tension, since the ice-blocking longitudinal cable 9 is a longitudinal cable that connects each layer of ice-blocking inclined cables 4 and provides point-to-point constraints, its length variation range is not large, and it can be extended and shortened adaptively by changing the chord length and arc. And because the ice-blocking longitudinal cable is in the direction of water flow, it has little effect on the flow of water or ice-water mixture, and mainly plays a point-to-point constraint role in the longitudinal grid between each layer of ice-blocking inclined cables, that is, maintaining the required shape of the ice-blocking inclined cable system), forming a combined safety ice-blocking system with unequal spacing and increasing floating body horizontal height. The heights of the semi-submersible floating body 8 above the water surface are 15 cm, 25 cm, 30 cm, and 40 cm respectively along the direction of the water flow.

[0026] For this example, the channel width of the water conveyance main channel 1 is 60m. During the ice period, an ice belt with a maximum ice surface width of 50m, a thickness of 1m, and a length of 10km can be formed. The safe ice-blocking load before the control gate can reach 10t / m according to the river ice dynamics calculation, so the total ice-blocking load of this section is 500t. In this example, there are four groups of unequally spaced and increasing floating body height ice-blocking systems. After being arranged at angles (10°, 20°, 25°, and 35°) to the horizontal line (vertical to the direction of water flow), the total length of the ice-blocking cable is 330m, and the average safe ice-blocking load exceeds 5t / m. According to the calculation of a single group of ice-blocking cables, each group of ice-blocking cables along the direction of water flow can bear a minimum ice-blocking load of 100t, 150t, 200t, and 250t, respectively. The combined ice-blocking load is much higher than the maximum possible load of 500t on the water conveyance main channel 1, so it has high reliability and safety.

[0027] The above structure can also be implemented in open water conveyance canals such as deep excavation and high fill water conveyance canals. This structure can not only provide a large load ice-blocking structure, but also effectively ensure the force safety and structural stability of the ice-blocking structure itself, effectively control the ice conditions in the water conveyance canal, prevent floating ice and ice cover from harming the water conveyance canal facilities, and indirectly improve the water conveyance efficiency of the water conveyance canal, which has significant social and economic benefits.

[0028] The above example takes the large-scale water supply trunk canal of the middle line project as an example. It completely solves the problems of insufficient load, poor adaptability and easy breakage and failure of ice-blocking cables in the existing large-scale water supply trunk canal during the ice period in terms of methods and means. It is extremely innovative and has great promotion value.

[0029] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use the ice-blocking structure for a water conveyance main channel of the present invention, and can produce the positive effects described in the present invention.

[0030] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0031] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above specific embodiments. Those skilled in the art may make some modifications, supplements or use similar methods instead without departing from the principle of the present invention, which should also be regarded as the protection scope of the present invention.

Claims

1. A water supply channel ice blocking structure, It is characterized in that The invention comprises an ice-blocking inclined cable (4), a basic chute (5), a movable mooring pile (6) and a mooring pile stopper (7), wherein the basic chute (5) is fixed on the horseway (2) on both sides of the bank of the water conveyance main channel (1), and a plurality of ice-blocking inclined cables (4) are connected between two basic chute (5) across the water conveyance main channel (1), and both ends of each ice-blocking inclined cable (4) are connected to the basic chute (5) through the movable mooring pile (6) and form a sliding cooperation relationship therewith, and the movable mooring pile (6) is fixed on the horseway (2) on both sides of the bank of the water conveyance main channel (1). The sliding direction of the movable mooring pile (6) is the same as the direction of water flow; the mooring pile limiter (7) is detachably connected to the basic chute (5) and is used to limit the movable mooring pile (6) in the direction of water flow; the angle between each of the ice-blocking inclined cables (4) and the direction of water flow on the horizontal plane is an acute angle or an obtuse angle, so that the distance between two adjacent ice-blocking inclined cables (4) increases or decreases along the direction vertical to the water flow, and the distance between two adjacent ice-blocking inclined cables (4) increases along the direction of water flow.

2. The ice-blocking structure for a water conveyance main channel according to claim 1, Features: A semi-submersible floating body (8) is arranged on each of the ice-blocking inclined cables (4).

3. The ice-blocking structure for a water conveyance main channel according to claim 2, Features: The inner diameters of the semi-submersible floating bodies (8) on the plurality of ice-blocking inclined cables (4) increase gradually along the water flow direction.

4. The ice-blocking structure for a water conveyance main channel according to claim 1, Features: A plurality of ice-blocking longitudinal cables (9) are connected between each two adjacent ice-blocking oblique cables. The extending direction of the ice-blocking longitudinal cables (9) is the same as the direction of the water flow. The ice-blocking oblique cables (4) and the ice-blocking longitudinal cables (9) together form a mesh cable structure.

5. The ice-blocking structure for a water conveyance main channel according to claim 1, Features: The angle between each of the ice-blocking inclined cables (4) and the water flow direction on the horizontal plane is set to α, 65°<α<90° or 90°<α<125°.

6. The ice-blocking structure for a water conveyance main channel according to claim 1, Features: The basic chute (5) is an integral steel structure, which can bear a load of 10t to 20t from the ice-blocking cable at a single point, and the unidirectional load of the integral steel structure can reach 100t.

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