Assembly type gate bottom plate structure and construction method

Abstract

The application relates to the technical field of water gate engineering, and discloses a fabricated gate bottom plate structure and a construction method, which comprise a plurality of vertically arranged steel pipe piles and a plurality of prefabricated box modules; the box modules are assembled to form a gate bottom plate body; each box module comprises a plurality of cabin units which are longitudinally staggered in a tooth-shaped structure. The fabricated gate bottom plate structure and the construction method are characterized in that the gate bottom plate body is integrally manufactured by factory prefabrication and on-site assembly of a plurality of box modules; after the box modules are installed in place, a diver connects a concrete pouring pipe underwater, opens a drainage hole, pours bottom sealing concrete underwater, confirms that the box is closed, pours underwater non-segregation concrete in the warehouse, and judges the pouring condition according to the quantity and the overflow slurry of the drainage hole. The gaps between the box modules are filled with concrete by the pipe method to form an integral whole, so that the gate bottom plate body can be rapidly constructed, and the construction period is shortened.

Description

Technical Field

[0001] This invention relates to the field of sluice gate engineering technology, specifically to a prefabricated gate bottom plate structure and construction method. Background Technology

[0002] As the core load-bearing component of a sluice gate project, the structural form and construction technology of the gate bottom slab directly affect the project quality, schedule, and cost. Traditional cast-in-place gate bottom slab technology is mature but suffers from problems such as low efficiency and strong environmental dependence. In contrast, prefabricated gate bottom slabs have significant advantages in the application of large-span waterways with busy shipping traffic due to their advantages of industrialized production and rapid construction.

[0003] Representative projects among the large-span navigation channel sluice gates completed both domestically and internationally include: the Thames Tide Barrier in the UK, with a maximum orifice width of 61m, featuring a monolithic cast-in-place reinforced concrete caisson foundation, achieved through a combination of prefabrication and cast-in-place construction techniques; and the Masland Wave Barrier in the Netherlands, with a span of 360m, its foundation consisting of three main systems: a prestressed concrete caisson foundation, a spherical hinged support platform, and a gradually changing steel-concrete composite structure. my country's earliest large-span sluice gate project is the Changzhou New Sluice Gate in Jiangsu Province, with a maximum orifice width of 60m and employing a monolithic flat floor. In recent years, with the development of urban water conservancy projects towards larger scale and more aesthetically pleasing designs, and the widespread application of new materials, the design and research of new sluice gates has become an important development trend. Typical engineering examples include: the Suzhou Creek Sluice Gate in Shanghai, with a single-orifice clear width of 100m; the Sanchahekou Sluice Gate on the Qinhuai River in Nanjing, with a maximum orifice width of 40m; and the Changzhou Bell Tower Sluice Gate, with a gate width of 90m.

[0004] Currently, tide gates are mainly classified into three structural types: integral cast-in-place, prefabricated, and steel-concrete hybrid. Most gate base slabs are constructed using cast-in-place construction techniques, with two main structural behaviors: integral cast-in-place base slabs and separate base slabs. In integral cast-in-place base slabs, the gate pier and base slab are cast as a single unit, with segmental joints located on the gate pier. Separate base slabs separate the gate pier and base slab by setting settlement joints, allowing for separate casting. While cast-in-place gate base slabs offer good integrity and seismic performance, making them suitable for complex foundations, they still present challenges such as long construction periods, susceptibility to temperature cracks, and significant dust and noise pollution from on-site dry construction. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a prefabricated gate bottom plate structure and construction method, solving the problems mentioned in the background.

[0006] The present invention provides the following technical solution: a prefabricated gate bottom plate structure, comprising: multiple vertically arranged steel pipe piles, and multiple prefabricated casing modules; The casing modules are assembled to form the gate bottom plate body; Each housing module contains multiple compartment units, which are arranged longitudinally in a toothed structure. Adjacent housing modules also enhance anti-slip performance in the direction of water flow through the toothed structure.

[0007] Preferably, the top of the housing module is equipped with a measurement and control tower, which integrates a floating stability controller, a winch, and connecting cables; The floating stabilization controller stabilizes the module's floating motion by adjusting the water level within the compartment unit.

[0008] Preferably, the bottom of the casing module is provided with a docking hole that matches the steel pipe pile.

[0009] Preferably, the top of the housing module is provided with a cable guide for connecting cable guides.

[0010] Preferably, the number of the casing modules is 17, the planar dimensions are 80m × 22.5m, and the span of the gate bottom plate after the casing modules are assembled is 400m; The number of steel pipe piles is 583, with a diameter of 2540mm and a length of 45.5m.

[0011] A construction method for a prefabricated gate bottom slab structure includes the following steps: Step S1, trench dredging: excavate the trench and level it to the preset elevation; Step S2: Prefabrication of gate bottom plate casing module; Step S3: Transport of the gate bottom plate housing module; Step S4: Install the gate bottom plate casing; Step S5, concrete pouring; Step S6: Backfilling.

[0012] Preferably, step S3 includes: Step S31: Determine the freeboard height of the housing module; Step S32: Install pontoons on both sides of the buoy module to assist the buoy module in floating. Set the floating water level and the docking water level according to the tide. Step S33: The tugboat tows the container module to the outfitting dock for mooring, and installs a measurement and control tower on the container module. The measurement and control tower is equipped with a floating stabilization controller, winch and connecting cable. The floating stabilization controller is used to adjust the water level in the compartment unit to a stable state. Step S34: The vessel is floated and towed to the construction site under the traction of a shore winch and ground anchor.

[0013] Preferably, step S4 includes: Step S41: Use suction anchor blocks to position the housing module; Step S42: Overcome transcritical instability by using a crane ship to lift and sink the vessel, and simultaneously adjust the water level of each compartment unit through a floating stability controller. Step S43: Control the elevation and planar position of the control box module by measuring the relative position of the control tower and the gate pier; Step S44: Open the vent hole to allow the casing module to rest on top of the steel pipe pile.

[0014] Preferably, step S5 includes: In step S51, after the gate bottom plate casing is installed in place, the diver connects the concrete pouring pipe underwater, opens the drainage hole, and pours the sealing concrete underwater. Step S52: After confirming that the compartment unit is sealed, pour underwater non-segregating concrete in sections, and judge the pouring status based on the volume and the overflow of grout from the drainage holes. In step S53, the compartment unit is formed by pouring concrete using the duct method to create a whole.

[0015] Preferably, after the concrete construction of the gate bottom slab is completed, a backhoe dredger is used to backfill the over-excavated part of the foundation trench with crushed stone up to the bottom elevation of the revetment.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention involves prefabricating the gate bottom slab into multiple modular casings in a factory and assembling them on-site. After the casings are installed, divers connect the concrete pouring pipes underwater, open the drainage holes, and pour underwater sealing concrete. Once the casings are confirmed to be sealed, underwater non-segregating concrete is poured in sections. The pouring progress is judged based on the volume and the amount of grout overflowing from the drainage holes. A tremie pipe method is used between the casings to pour concrete and form a unified structure, enabling rapid construction of the gate bottom slab and shortening the construction period. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the gate bottom plate body structure of the present invention; Figure 2 This is a schematic diagram of the casing module structure of the present invention; Figure 3 This is a schematic diagram of the connection structure between the casing module and the steel pipe pile of the present invention; Figure 4 This is a schematic diagram of the measurement and control tower structure of the present invention; Figure 5 This is a schematic diagram of the tugboat structure of the present invention; Figure 6 This is a schematic diagram of the suction anchor block structure of the present invention; Figure 7 This is a flowchart of the present invention.

[0018] In the diagram: 1. Gate bottom plate body; 2. Steel pipe pile; 3. Casing module; 31. Chamber unit; 4. Measurement and control tower; 41. Floating stability controller; 42. Winch; 43. Connecting cable; 44. Cable guide; 5. Float; 6. Towing vessel; 7. Suction anchor block; 8. Crane vessel. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-7 A prefabricated gate bottom plate structure and construction method, comprising: multiple vertically arranged steel pipe piles 2, and multiple prefabricated casing modules 3; The three-tiered casing module 3 is assembled to form the gate bottom plate body 1; Each housing module 3 contains multiple compartment units 31, which are arranged longitudinally in a toothed structure. The toothed structure of adjacent housing modules 3 enhances the anti-slip performance in the direction of water flow.

[0021] The top of the housing module 3 is equipped with a measurement and control tower 4, which integrates a floating stability controller 41, a winch 42 and a connecting cable 43. The floating stabilization controller 41 stabilizes the module's floating by adjusting the water level inside the compartment unit 31.

[0022] The bottom of the casing module 3 is provided with a docking hole that matches the steel pipe pile 2.

[0023] The top of the housing module 3 is provided with a cable guide 44 for connecting the cable 43 guide.

[0024] There are 17 sets of casing modules 3, with a planar dimension of 80m × 22.5m, and the span of the gate bottom plate after the casing modules 3 are assembled is 400m; The number of steel pipe piles 2 is 583, with a diameter of 2540mm and a length of 45.5m.

[0025] A construction method for a prefabricated gate bottom slab structure includes the following steps: Step S1, trench dredging: excavate the trench and level it to the preset elevation; Step S2: Prefabrication of gate bottom plate casing module 3; Step S3: Transport the gate bottom plate housing module 3; Step S4: Install the gate bottom plate casing; Step S5, concrete pouring; Step S6: Backfilling.

[0026] Step S3 includes: Step S31: Determine the freeboard height of the housing module 3; Step S32: Install pontoons 5 on both sides of the housing module 3 to assist the housing module 3 in floating. Set the floating water level and the docking water level according to the tide. In step S33, the tugboat 6 tows the container module 3 to the outfitting dock for mooring, and installs the measurement and control tower 4 on the container module 3. The measurement and control tower 4 is equipped with a floating stabilization controller 41, a winch 42 and a connecting cable 43. The floating stabilization controller 41 is used to adjust the water level in the compartment unit 31 to a stable state. Step S34: The vessel is floated and towed to the construction site under the traction of the shore winch 42 and the ground anchor. After the container module 3 is floated to the construction site, it is positioned using suction anchor blocks 7. Suction anchor blocks 7 can provide greater tensile force than traditional ship anchors. The container module 3 is lifted and sunk using a crane ship. The crane ship is used to overcome the problem of instability of the container module 3 across the critical surface. The floating stability control system adjusts the water level in each compartment to achieve stable sinking and installation of the container. The position and elevation of the container module 3 are controlled by the relative position of the measurement control tower 4 and the gate pier. The container module 3 is placed on the steel pipe pile 2 to complete the underwater installation of the container module 3.

[0027] Step S4 includes: Step S41: Use suction anchor block 7 to position the housing module 3; Step S42: Overcome cross-critical instability by using the crane ship 8 to lift and sink the vessel, and simultaneously adjust the water level of each compartment unit 31 through the floating stability controller 41. Step S43: The elevation and planar position of the control box module 3 are controlled by measuring the relative position of the control tower 4 and the gate pier. Step S44: Open the vent hole so that the casing module 3 rests on top of the steel pipe pile 2.

[0028] Step S5 includes: In step S51, after the gate bottom plate casing is installed in place, the diver connects the concrete pouring pipe underwater, opens the drainage hole, and pours the sealing concrete underwater. Step S52: After confirming that the compartment unit 31 is sealed, pour underwater non-segregating concrete in sections, and judge the pouring status based on the volume and the overflow of grout from the drainage hole. In step S53, the 31 compartment units are formed by pouring concrete using the conduit method to create a whole.

[0029] After the concrete construction of the gate bottom slab is completed, a backhoe dredger is used to backfill the over-excavated part of the foundation trench with crushed stone to the bottom elevation of the revetment.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A construction method for a prefabricated gate bottom slab structure, the prefabricated gate bottom slab structure comprising: Multiple vertically arranged steel pipe piles (2), and multiple prefabricated casing modules (3); The casing module (3) is assembled to form the gate bottom plate body (1); Each housing module (3) contains multiple compartment units (31), which are arranged in a staggered, toothed pattern in the longitudinal direction. The adjacent housing modules (3) enhance the anti-slip performance in the direction of water flow through the toothed pattern. Its characteristic is that it includes the following steps: Step S1, trench dredging: excavate the trench and level it to the preset elevation; Step S2, prefabrication of gate bottom plate casing module (3); Step S3, transport of gate bottom plate casing module (3); Step S31, determine the freeboard height of the housing module (3); Step S32: Install pontoons (5) on both sides of the buoy module (3) to assist the buoy module (3) in floating. Set the floating water level and the docking water level according to the tide. Step S33, the tugboat (6) tows the container module (3) to the outfitting dock for mooring, and installs a measurement control tower (4) on the container module (3). The measurement control tower (4) is equipped with a floating stability controller (41), a winch (42) and a connecting cable (43). The floating stability controller (41) is used to adjust the water level in the compartment unit (31) to a stable state. Step S34: The vessel is floated and towed to the construction site under the traction of a shore winch (42) and a ground anchor; Step S4: Install the gate bottom plate casing; Step S41, use suction anchor block (7) to position the housing module (3); Step S42: Overcome cross-critical instability by using the crane ship (8) to lift and sink the vessel, and simultaneously adjust the water level of each compartment unit (31) through the floating stability controller (41); Step S43: The elevation and planar position of the control box module (3) are controlled by measuring the relative position of the control tower (4) and the gate pier; Step S44: Open the vent hole so that the casing module (3) rests on top of the steel pipe pile (2); Step S5, concrete pouring; In step S51, after the gate bottom plate casing is installed in place, the diver connects the concrete pouring pipe underwater, opens the drainage hole, and pours the bottom sealing concrete underwater. Step S52: After confirming that the compartment unit (31) is sealed, pour underwater non-segregating concrete in sections, and judge the pouring situation based on the volume and the overflow of grout from the drainage hole. Step S53, the compartment unit (31) is formed into a whole by pouring concrete through the guide pipe method; Step S6: Backfilling.

2. The construction method of a prefabricated gate bottom slab structure according to claim 1, characterized in that, After the concrete construction of the gate bottom slab is completed, a backhoe dredger is used to backfill the over-excavated part of the foundation trench with crushed stone to the bottom elevation of the revetment.

3. The construction method of a prefabricated gate bottom slab structure according to claim 1, characterized in that, The bottom of the casing module (3) is provided with a docking hole that matches the steel pipe pile (2).

4. The construction method of a prefabricated gate bottom slab structure according to claim 1, characterized in that, The top of the housing module (3) is provided with a cable guide (44) for connecting the cable (43) guide.

5. The construction method of a prefabricated gate bottom slab structure according to claim 3, characterized in that, The number of the casing modules (3) is 17, the planar dimensions are 80m×22.5m, and the span of the gate bottom plate after the casing modules (3) are assembled is 400m; The number of steel pipe piles (2) is 583, with a diameter of 2540mm and a length of 45.5m.

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