Design method of ultra-large span tide gate with self-stabilizing structure

Abstract

The invention discloses a design method of an ultra-large-span tide gate with a self-stabilizing structure. The tide gate comprises gate foundations arranged on the two sides of a riverway estuary, and each gate foundation is provided with an arc-shaped guide groove and a spherical supporting hinge; the spherical trunnions are connected with one ends of the water retaining gates, the other ends of the water retaining gates make contact with each other to be in a closed state when storm surge comes, and the closing point of the water retaining gates is located on the open sea side of the connecting line of the two spherical trunnions. An arc-shaped stability maintaining piece matched with the arc-shaped guide groove is arranged in the arc-shaped guide groove, one end of the arc-shaped stability maintaining piece is fixedly connected with the water retaining gate, and the other end of the arc-shaped stability maintaining piece is connected with the hoist. Navigation and the hydrological river regime of the original river channel are not affected in the processes of structural design, manufacturing, processing, transportation, installation, overhaul and maintenance and the like, and the influence on the original river channel can be reduced to the maximum extent.

Description

Technical Field

[0001] The invention relates to the technical field of tide gates, and in particular to a design method for a super-large-span tide gate with a self-stabilizing structure. Background Art

[0002] As global temperatures continue to rise, sea levels are rising slowly, while land continues to sink, resulting in frequent seawater backflow and urban waterlogging disasters in coastal areas during flood season. In order to protect the lives and property of people in coastal cities, flood control walls or tide gates can be built. In actual construction, since flood control wall projects require large investments and are easy to damage the unique waterfront environment of coastal cities, most of them use tide gates to resist storm surges. Commonly used large-span tide gates (single span 100m to 200m) generally have flat double-opening fan-shaped gates, such as the Maasland tide gate in the Netherlands; vertical rotating gates, such as the Thames tide gate in the UK; vertical lifting gates, such as the Cao'e River tide gate; mirror gates, such as the Sancha River tide gate in Nanjing. However, for super-large span rivers of 400m to 500m, no matter which form of tide gate is used, gate piers must be set in the water, which causes a greater negative impact on shipping, original river hydrology and river flow during the construction, operation and maintenance stages. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a design method for a super-large span tide gate with a self-stabilizing structure, which can specifically adopt the following technical solutions: The design method of the ultra-large-span tide gate with a self-stabilizing structure described in the present invention comprises a gate foundation arranged on both sides of a river estuary, wherein the gate foundation is provided with an arc guide groove and a spherical support hinge; the spherical support hinge is connected to one end of a water retaining gate, and the other end of the water retaining gate contacts each other in a closed state when a storm tide comes, and the closing point of the water retaining gate is located on the outer sea side of the connection line of the two spherical support hinges; an arc-shaped stabilizing member adapted thereto is provided in the arc guide groove, and one end of the arc-shaped stabilizing member is fixedly connected to the water retaining gate, and the other end is connected to a hoist; The design method comprises the following steps: First, determine the reasonable location of the tidal gate according to the engineering geological conditions of the coastal city estuary, underwater geological and topographic conditions, river hydrological and river flow conditions, navigation needs, and the construction conditions on both sides of the river. Secondly, determine the reasonable width of the tidal gate based on navigation needs, underwater geological and topographic conditions, and river hydrological and river flow conditions; Secondly, according to the reasonable engineering location and reasonable width of the tidal gate, following the requirements of "structural safety, flexible opening and closing, stable operation, and convenient maintenance", the spatial system method is used for overall structural design; Finally, the tide gates were constructed according to the design plan, and problems found in actual operation were adjusted and resolved in a timely manner to ensure the normal operation of the tide gates.

[0004] Preferably, the spherical hinge is arranged at the top of the gate foundation, including a base and a rotating member, the base is connected to the fan-shaped grid-shaped concrete reinforcement at the top of the gate foundation through a first metal connecting member, the rotating member rotates horizontally around the base, and is connected to the tail of the water retaining gate through a second metal connecting member.

[0005] Preferably, the water retaining gate is a hollow metal box-type structure, a rubber waterstop is provided at the bottom of the water retaining gate, a water retaining flap connected to the telescopic rod is provided at the top of the water retaining gate, and the free end of the water retaining gate is closed in a surface contact form.

[0006] Preferably, the contact end of the water retaining gate is provided with a locking mechanism, and the hoist is provided with a locking mechanism. When the water retaining gate is in a closed state, both the locking mechanism and the locking mechanism are in a working state.

[0007] Preferably, the arc-shaped stabilizing member is connected to the gate hoist via a gear rack mechanism, and the gear rack mechanism includes an arc-shaped rack arranged on the top of the arc-shaped stabilizing member, and the arc-shaped rack is meshed with a gear driven by the gate hoist.

[0008] Preferably, the arc-shaped stabilizing member is arranged at one end of the water retaining gate close to the spherical hinge, and the arc-shaped stabilizing member is located on the outer sea side of the water retaining gate.

[0009] The ultra-large-span tide gate with self-stabilizing function described in the present invention is mainly composed of a water retaining gate, an arc-shaped stabilizing member, a spherical support hinge and an arc-shaped guide groove, wherein the water retaining gate serves as a water retaining structure and a force transmission structure, and transmits the water load of the head difference generated by the storm tide to the gate foundation on the shore; the arc-shaped stabilizing member serves as a force transmission member of the hoist to the water retaining gate, and is also used to maintain the vertical stability structure of the water retaining gate to prevent the water retaining gate from vertically tilting and overturning during the opening and closing process; the spherical support hinge serves as the rotation center of the water retaining gate, and an arc-shaped guide groove is used to guide the movement of the arc-shaped stabilizing member to ensure that the water retaining gate can rotate flexibly. The above-mentioned water retaining gate is placed on both sides of the river during normal navigation, and does not affect normal passage; when a storm tide comes, it can be quickly closed to form a three-hinged arch structure to play a role in tide blocking. It has the characteristics of stable structure, flexible opening and closing, safe operation, and convenient maintenance. At the same time, it does not affect the navigation and the hydrological river flow of the original river channel during the process of structural design, manufacturing and processing, transportation and installation, and maintenance, thereby minimizing the impact on the original river channel.

[0010] Compared with the prior art, the advantages of the present invention are as follows: 1) It has a wide range of applications and can be used for tidal barriers in rivers with normal spans (single span 50m to 100m), large spans (single span 100m to 200m), and super-large spans (single span 400m to 500m).

[0011] 2) The rotation center of the floodgate is set on both sides of the river channel. No pier structure and complex mechanical and electrical equipment are required in the water, so it does not affect normal shipping. When a storm surge comes, the floodgate is closed under the action of the gate opening force and forms a stable three-hinged arch structure. The water load caused by the head difference of the storm surge is transferred to the foundation on the shore through the gate leaf structure, thereby stably resisting the impact of the storm surge on coastal megacities and ensuring the safety of people's lives and property in coastal areas.

[0012] 3) The tide gate described in the present invention does not have gate piers in the water, does not increase the riverbed elevation, and adopts the caisson method during construction, directly sinking the prefabricated box into the water without interrupting the construction, so it will not cause a significant impact on shipping during the construction stage.

[0013] 4) The routine inspection and maintenance of the tide gate of the present invention is carried out in the gatehouses on both sides. If a major repair is required, a tugboat can be used to tow the gate of the tide gate to a shipyard for inspection or directly use the wading inspection method. Therefore, it will not cause a significant impact on shipping during the operation and maintenance stage.

[0014] 5) The present invention adopts a method of installing an arc-shaped stabilizing member on the water retaining gate, and the arc-shaped stabilizing member is also connected to the hoist, which makes up for the deficiency that the conventional miter gate structure is used in a super-large span river channel, and the gate is prone to vertical tilt and rollover during the opening and closing process due to the small stroke of the opening and closing equipment; in addition, the arc-shaped guide groove matched with the arc-shaped stabilizing member can also limit the opening and closing of the water retaining gate to ensure the smooth operation of the opening and closing process.

[0015] 6) In order to solve the design problems of reasonable gate type and structure of super-large span tide gate, the space system method was directly used to design its structure in accordance with the principles of structural safety, advanced technology, flexible opening and closing, and convenient maintenance, which improved the design quality and efficiency of super-large span tide gate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the tide gate described in the present invention.

[0017] Figure 2 yes Figure 1 Schematic diagram of the structure of the gear rack mechanism connecting the arc-shaped stabilizing member and the gate hoist.

[0018] Figure 3 yes Figure 1 Schematic diagram of the structure of the medium spherical hinge.

[0019] Figure 4 yes Figure 1 Schematic diagram of the structure of the water retaining flap at the top of the middle water retaining gate. DETAILED DESCRIPTION

[0020] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0021] like Figure 1-4 As shown, the ultra-large span tide gate with a self-stabilizing structure described in the present invention is arranged at the river estuary, and includes gate foundations 1 installed on both sides of the river, each gate foundation 1 is provided with an arc guide groove 2 and a spherical support hinge 3.

[0022] The spherical support hinge 3 is arranged on the top of the gate foundation 1, and includes a base and a rotating part made of low-alloy high-strength steel, wherein the rotating part is composed of a sphere 31 and an arc-shaped rotating plate 32 connected by welding. A first metal connector 34 with a rear baffle 33 is arranged on the rear side of the above-mentioned base, and the rear baffle 33 is connected to the fan-shaped grid-shaped concrete reinforcement 35 on the top of the gate foundation 1, thereby improving the installation stability of the spherical base 31. The arc-shaped rotating plate 32 is arranged horizontally, and is connected to the tail of the fan-shaped water retaining gate 4 through a fan-shaped second metal connector 36 with a grid structure, so that the water retaining gate 4 can rotate in a horizontal plane while maintaining a vertical state. Usually, the two water retaining gates 4 are equal in size and arranged symmetrically on both sides, and the sum of their widths is greater than the spacing between the two spherical support hinges 3. When installed, the water retaining gate 4 is rotated within a range close to the open sea side. When a storm surge comes, the two floodgates 4 are in contact with each other and in a closed state, and the closing point is also located on the outer sea side of the line connecting the two spherical hinges 3. At this time, the water level on the outer sea side is higher than that on the inner river side. Under the action of the water load on the outer sea side, the two floodgates 4 are in a compressed state, and the closed tide gate forms a stable three-hinged arch structure as a whole. In addition, after the storm surge ends, if the floodgates 4 are not opened in time, when the water level on the inner river side is higher than that on the outer sea side, the arc-shaped rotating plate 32 will fall off from the spherical base 31 under the action of the reverse water pressure. Therefore, in order to avoid this disadvantage, a limit plate 37 for preventing the arc-shaped rotating plate 32 from falling off is also provided on the front side of the spherical base 31.

[0023] Preferably, the water gate 4 adopts a hollow metal box-shaped structural member, which is wide in the middle and narrow at both ends, and a vertical plane structure is provided at the free end, so that the two water gates 4 are in surface contact when they are closed, thereby enhancing the water blocking effect. Secondly, a locking mechanism is provided between the two water gates 4, for example, a blocking rod is provided on one of the water gates 4, and a card slot matching the blocking rod is provided on the other water gate 4. Thirdly, a rubber water stop is provided at the bottom of the water gate 4 to prevent water from flowing from the bottom of the water gate 4 when the tide gate is closed. Finally, a water-blocking flap 41 is installed on the top of the water gate 4, and the water-blocking flap 41 is connected to the telescopic rod 42. When the tide gate is in the open state, the telescopic rod 42 is retracted, and the water-blocking flap 41 is placed horizontally to cover the top of the water gate 4; when the tide gate is in the closed state, the telescopic rod 42 is extended, and the water-blocking flap 41 is turned 90° and set vertically to resist the high water level on the outer sea side.

[0024] In order to make up for the shortcomings of conventional miter gate structures that are prone to vertical tilting and overturning during the opening and closing process when used in ultra-large span rivers, an arc-shaped stabilizing member 5 (usually located at 1 / 4 to 1 / 3 of the length of the water retaining gate 4) is fixedly connected to one end of the water retaining gate 4 close to the spherical hinge 3. Normally, the arc-shaped stabilizing member 5 is located on the outer sea side of the water retaining gate 4, and it is adapted to the arc-shaped guide groove 2 on the gate foundation 1. An arc-shaped rack 61 is provided on the top of the arc-shaped stabilizing member 5, and the arc-shaped rack 61 is meshed with a gear 62 driven by the hoist. When the hoist is working, the gear 62 rotates to drive the arc-shaped rack 61 to move, thereby opening or closing the water retaining gate 4. The above-mentioned method of connecting the arc-shaped stabilizing member 5 to the hoist solves the opening and closing problem of the conventional miter gate structure with an ultra-large span.

[0025] Preferably, the hoist is provided with a locking mechanism, and when the water retaining gate 4 is in a closed state, the locking mechanism is in a working state.

[0026] For the above-mentioned ultra-large span tide gate with a self-stabilizing structure, the present invention also provides a design method, which specifically includes the following steps: First, determine the reasonable engineering location for building a tidal gate based on the engineering geological conditions of the coastal city estuary, underwater geological and topographic conditions, river hydrological and river flow conditions, navigation needs, and construction conditions on both sides of the river.

[0027] Secondly, the reasonable width of the tidal gate should be determined based on navigation needs, underwater geological and topographic conditions, and river hydrological and river flow conditions.

[0028] Thirdly, according to the reasonable engineering location and reasonable width of the tide gate, and in accordance with the requirements of "structural safety, flexible opening and closing, stable operation, and convenient maintenance", the spatial system method is used for overall structural design. Among them, the main contents of the structural design include: the design of the water gate 4 structure, the top water retaining flap 41 structure, the bottom water stop structure, the spherical support hinge 3 structure, the arc-shaped stabilizing member 5 structure, the arc-shaped rack 61 structure, and the gear 62 structure of the super-large tide gate. The spatial system method includes three-dimensional geometric modeling of the overall tide gate structure, division of finite element meshes, application of loads and boundary conditions, structural analysis, etc. Compared with the plane system method, it does not need to be simplified or calculated separately for the structure, which can improve the design efficiency and quality.

[0029] Finally, the tide gates were constructed according to the design plan, and problems found in actual operation were adjusted and resolved in a timely manner to ensure the normal operation of the tide gates.

[0030] It should be noted that, in the description of the present invention, terms indicating orientation or positional relationships, such as "front", "rear", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or positional relationships shown in the drawings and 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 operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Claims

1. A design method for a super-large-span tide gate with a self-stabilizing structure, characterized in that: The tide gate comprises a gate foundation arranged on both sides of the river estuary, and an arc-shaped guide groove and a spherical support hinge are arranged on the gate foundation; the spherical support hinge is connected to one end of the water retaining gate, and the other end of the water retaining gate contacts each other in a closed state when a storm tide comes, and the closing point of the water retaining gate is located on the outer sea side of the connection line of the two spherical support hinges; an arc-shaped stabilizing member adapted thereto is arranged in the arc-shaped guide groove, and one end of the arc-shaped stabilizing member is fixedly connected to the water retaining gate, and the other end is connected to the hoist; The design method comprises the following steps: First, determine the reasonable location of the tidal gate according to the engineering geological conditions of the coastal city estuary, underwater geological and topographic conditions, river hydrological and river flow conditions, navigation needs, and the construction conditions on both sides of the river. Secondly, determine the reasonable width of the tidal gate based on navigation needs, underwater geological and topographic conditions, and river hydrological and river flow conditions; Secondly, according to the reasonable engineering location and width of the tidal gate, and in accordance with the requirements of "structural safety, flexible opening and closing, stable operation, and convenient maintenance", the spatial system method is used for overall structural design; Finally, the tide gates were constructed according to the design plan, and problems found in actual operation were adjusted and resolved in a timely manner to ensure the normal operation of the tide gates.

2. The design method of the ultra-large span tide gate with a self-stabilizing structure according to claim 1 is characterized in that: The spherical hinge is arranged on the top of the gate foundation, including a base and a rotating member. The base is connected to the fan-shaped grid-shaped concrete reinforcement at the top of the gate foundation through a first metal connecting member. The rotating member rotates horizontally around the base and is connected to the tail of the water retaining gate through a second metal connecting member.

3. The design method of the ultra-large span tide gate with a self-stabilizing structure according to claim 1 is characterized in that: The water retaining gate is a hollow metal box-shaped structural member, a rubber water stop is arranged at the bottom of the water retaining gate, a water retaining flap connected to the telescopic rod is arranged at the top of the water retaining gate, and the free end of the water retaining gate is closed in the form of surface contact.

4. The design method of the ultra-large span tide gate with a self-stabilizing structure according to claim 1 is characterized in that: The contact end of the water retaining gate is provided with a locking mechanism, and the hoist is provided with a locking mechanism. When the water retaining gate is in a closed state, the locking mechanism and the locking mechanism are both in a working state.

5. The design method of the ultra-large span tide gate with a self-stabilizing structure according to claim 1 is characterized in that: The arc-shaped stabilizing member is connected to the gate hoist via a gear rack mechanism, wherein the gear rack mechanism comprises an arc-shaped rack arranged on the top of the arc-shaped stabilizing member, and the arc-shaped rack is meshed with a gear driven by the gate hoist.

6. The design method of the ultra-large span tide gate with a self-stabilizing structure according to claim 1 is characterized in that: The arc-shaped stabilizing member is arranged at one end of the water retaining gate close to the spherical support hinge, and the arc-shaped stabilizing member is located on the outer sea side of the water retaining gate.

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