Ship lock navigation wall concrete slip form construction method

Abstract

The invention relates to a construction method of a ship lock navigation wall concrete slip form. The construction method comprises the following steps: erecting two rows of moving platforms, erecting a jacking platform, installing a formwork, erecting a jacking and pulling system, installing reinforcing steel bars, erecting a pouring platform, pouring concrete, separating and moving the formwork, and repeating multiple operations to obtain ship lock navigation wall concrete which is poured in sections. And the construction is safe and efficient, the apparent quality is improved, the cost is reduced, the environment is protected, the adaptability is high, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic engineering construction, and particularly relates to a construction method for the concrete of a lock navigation wall. Background Art

[0002] The main navigation wall of a lock, also known as the main navigation structure, is located on one side of the upstream and downstream routes of the lock and is a navigation structure used to guide ships to safely enter and leave the lock. The navigation wall and the lock chamber wall have similar structural characteristics, with large structural dimensions and variable cross-sections. Usually, the support + wooden formwork + pumping process or the turnover formwork + pumping construction method is adopted. The characteristics of the conventional method are many layers, many processes, long construction period, large input of labor, machinery and materials, frequent occurrence of quality common problems such as finished product stepped joints and color differences, and poor overall appearance; the pumping process has low efficiency and has high requirements for the slump of concrete. Under the working conditions restricted by the site and affected by the cross-construction of each process, how to improve the construction method to achieve safe and efficient construction and not be affected by the concrete slump is a practical problem faced by the project. Summary of the Invention

[0003] The purpose of the present invention is to provide a slip form construction method for the concrete of a lock navigation wall with efficient mechanized operation, aiming to solve the problems of large workload and large quality fluctuation in the concrete construction of the lock navigation wall.

[0004] The technical solution adopted by the present invention is: a slip form construction method for the concrete of a lock navigation wall, which includes the following steps: S1. Erect two rows of mobile platforms. The mobile platform includes a hydraulic cylinder, and the hydraulic rod of the hydraulic cylinder drives a traction head, and the traction head is connected to a support device; S2. Erect a jacking platform, and install a jacking device on the support device to form a jacking platform; S3. Install the formwork, assemble and install the formwork on the jacking platform, and fix it with scissors supports; S4. Erect a top-pull system. The tops of the two rows of formworks are fixed with channel steels to form vertical beams, multiple channel steels are horizontally movably installed in the middle section of the vertical beams to form cross beams, and channel steels are horizontally movably installed at both ends of the vertical beams to form edge beams; S5. Install the steel bars, and lay the concrete steel bar framework; S6. Erect a pouring platform. Fix a support on one side of the lock navigation wall, install a belt conveyor on the support, connect the input end of the belt conveyor to the aggregate bin, connect the output end of the belt conveyor to the feed chute of the material distributing device, connect the discharge chute of the material distributing device to the distributing device, and the distributing device is located inside the lock navigation wall; S7. Pour the concrete, use the pouring platform to pour the prepared concrete into the formwork to obtain a section of the concrete of the lock navigation wall; S8. Separate and move the formwork. First, remove the auxiliary fixing items of the formwork, then loosen the formwork by using the top-pull system, then use the jacking platform to lift the formwork as a whole by 10 - 15 cm, then use the mobile platform to translate the formwork to the next concrete pouring point, and finally use the jacking platform to restore the working height of the formwork to carry out the concrete pouring work of the next section of the lock navigation wall; S9. Repeat the operation multiple times to obtain the concretes of the lock navigation wall with segmented pouring.

[0005] A further technical solution of the present invention is that the supporting device is composed of two supporting feet arranged side by side. Rollers are installed below the supporting feet, and guiding grooves are formed on the rollers. Guide rails are pre-installed on the construction site. The guide rails are fixed to the ground along the edge of the navigation wall of the ship lock. There is a protruding guiding shaft on the central axis of the guide rail, and the guiding grooves are fitted onto the guiding shaft. The towing head is connected to the supporting feet to control the movement of the supporting device on the guide rail.

[0006] A further technical solution of the present invention is that the supporting device is composed of two supporting feet arranged side by side. Rollers are installed below the supporting feet. Guide rails are pre-installed on the construction site. The guide rails are fixed to the ground along the edge of the navigation wall of the ship lock, and guiding grooves are formed on the guide rails. The rollers are installed in the guiding grooves. The towing head is connected to the supporting feet to control the movement of the supporting device on the guide rail.

[0007] A further technical solution of the present invention is that the jacking platform includes a supporting block. A jack is fixed above the supporting device, and the other end of the jack is fixed to the bottom of the supporting block. The top of the supporting block is connected to the vertical beam with channel steel to form a column.

[0008] A further technical solution of the present invention is that a cross plate is fixed on the inner sides of the two supporting devices, and the cross plate engages with the upper template when the jacking platform descends.

[0009] A further technical solution of the present invention is that the tops of the two rows of templates are fixed with channel steel to form vertical beams. A plurality of channel steels are horizontally movably installed in the middle section of the vertical beams to form cross beams. Channel steels are horizontally movably installed at both ends of the vertical beams to form edge beams. One ends of the cross beam and the edge beam are locked to one vertical beam, and the other ends of the cross beam and the edge beam are fixed to the other vertical beam through movable slots and bolts. A first hydraulic rod is connected between the edge beam and the vertical beam, and a second hydraulic rod is connected between the cross beam and the vertical beam. The load of the first hydraulic rod is small and serves as auxiliary jacking and pulling power, and the load of the second hydraulic rod is large and serves as the main jacking and pulling power.

[0010] A further technical solution of the present invention is that the material distributing device is installed on the jacking and pulling system and can be horizontally moved and rotated around the output end of the belt conveying device driven by a motor. The top surface of the material distributing device is a notch-shaped feeding groove, and the discharging groove at the bottom is in a funnel shape.

[0011] A further technical solution of the present invention is that the distributing device is hoisted below the discharging groove by a hanging chain. The distributing device is a hanging type string barrel structure. The distributing device is composed of multiple long nozzle funnels connected in series by hanging chains. The length of the distributing device is adjusted according to the concrete pouring height, and the distributing device has a certain yaw adjustment ability.

[0012] The beneficial effects of the present invention are as follows: By adopting the above technical solutions, the following beneficial effects are obtained:

[0013] (1) High degree of mechanization. The slip form construction consists of a mobile platform, a jacking platform, a pouring platform, formwork, and a tensioning system. The components are simple and easy to install, forming a standardized operation. Moreover, the labor demand is small, the labor intensity is low, and the degree of mechanization is relatively high.

[0014] (2) Safe and efficient construction. The use of slip form construction avoids multiple repetitive tasks such as formwork erection, formwork removal, and scaffolding erection and dismantling. It can greatly shorten the installation and removal time of the layered formwork, improving work efficiency by about 30 - 50%. The formwork moves through the platform without the need for additional hoisting machinery for auxiliary construction, effectively avoiding the safety risks generated by the transfer and turnover of formwork. And it is verified and determined after modeling, with a reliable safety height.

[0015] (3) Improve the appearance quality and reduce costs. The slip form construction adopts large - layered construction and continuous construction, with strong integrity. It can effectively reduce the number of joints, reduce the perpendicularity and axis error. The surface of the finished product is flat and smooth, with a beautiful appearance. Quality common problems such as concrete offset are almost eliminated. At the same time, the slip form construction is convenient to reduce processes, reducing the consumption of hoisting equipment, formwork supports, labor, and materials, and reducing construction costs.

[0016] (4) Green and environmentally friendly, with strong adaptability. The equipment is relatively simple, the oil consumption is greatly reduced, the waste during construction is controlled, reducing environmental pollution, implementing the concept of environmental protection construction. The slip form construction has low requirements for the site, occupies a small space, and has little impact on cross - construction.

[0017] (5) Reduce costs and increase efficiency. Non - pumped concrete can improve the performance of concrete, effectively reduce the heat of hydration of cement, reduce the generation of concrete cracks, and reduce construction costs. The use of a belt conveyor device for pouring reduces the oil consumption rate, improves the pouring efficiency, shortens the pouring time, effectively reduces the occurrence of quality common problems such as color difference, and makes up for the shortcoming that the belt conveyor cannot be applied to mass concrete, and solves the construction limitations of the traditional integral tremie pipe. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the mechanized operation of a slip form construction method for a lock navigation wall concrete according to the present invention;

[0019] Figure 2 It is a schematic structural diagram of the tensioning system according to the present invention;

[0020] Figure 3 It is a front - view structural diagram of the pouring platform according to the present invention;

[0021] Figure 4 It is a top - view structural diagram of the pouring platform according to the present invention;

[0022] Figure 5 It is a schematic structural diagram of the distributing device according to the present invention. Detailed implementation mode

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation modes.

[0024] As Figure 1 and 2 shown, a concrete slip form construction method for a lock navigation wall includes the following steps: S1. Erect two rows of mobile platforms. The mobile platform includes a hydraulic cylinder 1, and the hydraulic rod 2 of the hydraulic cylinder drives a towing head 3, and the towing head 3 is connected to a support device 4; S2. Erect a jacking platform. A jacking device is installed on the support device to form a jacking platform; S3. Install the formwork. Assemble and install the formwork 8 on the jacking platform and fix it with a scissors support 9; S4. Erect a top-pull system. The tops of the two rows of formworks are fixed with channel steels to form a vertical beam 7 (welded or screwed). A plurality of channel steels are horizontally movably installed in the middle section of the vertical beam to form a cross beam 15. Channel steels are horizontally movably installed at both ends of the vertical beam to form a sealing edge beam 17. The cross beam and the sealing edge beam can adjust the span between the vertical beams; S5. Install the steel bars. Lay the concrete steel bar skeleton; S6. Erect a pouring platform. Fix a support 20 on one side of the lock navigation wall. A belt conveyor 19 is installed on the support. The input end of the belt conveyor is connected to an aggregate bin 25, and the output end of the belt conveyor is connected to the feed chute of a material distributing device 21. The discharge chute of the material distributing device is connected to a distributing device 22, and the distributing device 22 is located inside the lock navigation wall 23; S7. Pour the concrete. Use the pouring platform to pour the prepared concrete into the formwork to obtain a section of concrete for the lock navigation wall; S8. Separate and move the formwork. First, remove the auxiliary fixing items of the formwork, then loosen the formwork by using the top-pull system, then use the jacking platform to lift the formwork as a whole by 10-15 cm, then use the mobile platform to translate the formwork to the next concrete pouring point, and finally use the jacking platform to restore the working height of the formwork to carry out the concrete pouring work for the next section of the lock navigation wall; S9. Repeat the operation multiple times to obtain the concretes for the lock navigation wall poured in sections.

[0025] As Figure 1 shown, preferably, the support device is composed of two support feet 10 arranged side by side. A roller 13 is installed below the support feet, and a guide groove is opened on the roller. A guide rail 14 is pre-installed on the construction site. The guide rail is fixed on the ground along the edge of the lock navigation wall. There is a protruding guide shaft on the central axis of the guide rail, and the guide groove is matched to the guide shaft. The towing head is connected to the support feet to control the movement of the support device on the guide rail.

[0026] As Figure 1As shown in the figure, another preferred solution is that the supporting device is composed of two support feet 10 arranged side by side. Rollers 13 are installed below the support feet. A guide rail 14 is pre-installed on the construction site. The guide rail is fixed to the ground along the edge of the navigation wall of the ship lock. A guide groove is opened on the guide rail, and the rollers are installed in the guide groove. The towing head is connected to the support feet to control the movement of the supporting device on the guide rail.

[0027] As Figure 1 shown in the figure, the jacking platform includes a support block 11. A jack 12 is fixed above the supporting device, and the other end of the jack is fixed to the bottom of the support block 11. The top of the support block is connected to the vertical beam with channel steel to form a column 6. The scissors support is fixed to the column, and multiple templates are fixed together.

[0028] As Figure 1 shown in the figure, preferably, a cross plate 5 is fixed (welded or screwed) on the inner sides of the two supporting devices. When the jacking platform descends, the cross plate engages with the upper template. In another solution, there is no cross plate, and the moving platform sinks and is installed in the trench so that the template can achieve the best effect; in another solution, there is no cross plate, and the template is installed on the jacking platform and extends downward to the ground.

[0029] As Figure 2 shown in the figure of the top-pulling system, the tops of two rows of templates are fixed with channel steel to form a vertical beam 7 (welded or screwed). Multiple channel steels are horizontally movably installed in the middle section of the vertical beam to form a cross beam 15. Channel steels are horizontally movably installed at both ends of the vertical beam to form a sealing edge beam 17. One end of the cross beam and the sealing edge beam is locked to one vertical beam, and the other end of the cross beam and the sealing edge beam is fixed to the other vertical beam through a movable groove and bolts. A first hydraulic rod 18 is connected between the sealing edge beam and the vertical beam, and a second hydraulic rod 16 is connected between the cross beam and the vertical beam. The load of the first hydraulic rod is small and serves as the auxiliary top-pulling power, and the load of the second hydraulic rod is large and serves as the main top-pulling power.

[0030] The template is an assembled and standardized steel formwork, which is composed of standard templates and adjustable templates. The height is based on the height of the navigation wall of the ship lock, and the lengths are 3m and 4m respectively. Each formwork piece is numbered, and the assembly is carried out strictly according to the numbers to prevent assembly errors. The assembly is carried out with the cooperation of a 65t crane and manual labor. During hoisting, it is strictly prohibited to collide with the already installed templates. First, ensure that the bottom of the template coincides with the measurement control line during template assembly. Double-sided tape is pasted on the joint surface, and the verticality of the template and the deviation of the template during concrete pouring are checked by the method of suspending a plumb bob. The template assembly uses bolt connections, and the reinforcement uses φ20mm high-strength rolled thread steel for tensioning. Each component should be reinforced in place to prevent the template from shifting or bulging during concrete pouring.

[0031] As Figure 3 and 4The shown casting platform, the material distributing device is installed on the top-pulling system and can be driven by a motor to traverse and rotate around the output end of the belt conveying device. The top surface of the material distributing device is a notch-shaped feeding trough, and the discharging trough at the bottom is in the shape of a funnel.

[0032] As Figure 5 shown, the cloth distributing device 22 is hoisted below the discharging trough 21 through a hanging chain 24. The cloth distributing device is a hanging-connected string tube structure, which is formed by connecting multiple long-nozzle funnels in series through hanging chains. The length of the cloth distributing device can be adjusted according to the concrete casting height, and the cloth distributing device has a certain yaw adjustment ability.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for constructing a ship lock navigation wall concrete slipform, characterized in that: The steps include: S1. Set up two rows of mobile platforms, the mobile platform includes a hydraulic cylinder, the hydraulic rod of the hydraulic cylinder drives the traction head, the traction head is connected to the support device; S2. Set up a jacking platform, and install a jacking device on the supporting device to form a jacking platform; S3. Install the template, assemble and install the template on the lifting platform, and fix it with scissors; S4. Set up the top pulling system. The tops of the two rows of formwork are fixed with channel steel to form vertical beams. Multiple channel steels are installed horizontally and movably on the middle section of the vertical beams to form cross beams. Channel steels are installed horizontally and movably at both ends of the vertical beams to form edge beams. S5. Installation of steel bars, laying of concrete steel bar skeleton; S6. Set up a casting platform, fix a bracket on one side of the navigation wall of the ship lock, install a belt conveyor on the bracket, connect the input end of the belt conveyor to the aggregate bin, connect the output end of the belt conveyor to the feed trough of the material distribution device, connect the discharge trough of the material distribution device to the material distribution device, and the material distribution device is located inside the navigation wall of the ship lock; S7. Concrete pouring: using a pouring platform, pour the prepared concrete into the formwork to obtain a section of the lock navigation wall concrete; S8. Separation and movement of the formwork: first remove the auxiliary fixing items of the formwork, then use the jacking system to loosen the formwork, then use the jacking platform to lift the entire formwork by 10 to 15 cm, then use the mobile platform to move the formwork horizontally to the next section of concrete pouring point, and finally use the jacking platform to restore the formwork to the working height to carry out the next section of the ship lock navigation wall concrete pouring work; S9. Repeat the operation multiple times to obtain the segmentally cast ship lock navigation wall concrete.

2. A method for constructing a ship lock navigation wall concrete slipform according to claim 1, characterized in that: The support device is composed of two supporting feet arranged side by side, with rollers installed under the supporting feet and guide grooves on the rollers. Guide rails are pre-installed on the construction site, and the guide rails are fixed on the ground along the edge of the navigation wall of the lock. There is a raised guide shaft on the central axis of the guide rail, and the guide groove is matched to the guide shaft. The traction head is connected to the supporting feet to control the support device to move on the guide rails.

3. A method for constructing a ship lock navigation wall concrete slipform according to claim 1, characterized in that: The support device is composed of two supporting feet arranged side by side, rollers are installed under the supporting feet, guide rails are pre-installed on the construction site, the guide rails are fixed on the ground along the edge of the navigation wall of the lock, guide grooves are opened on the guide rails, rollers are installed in the guide grooves, and the traction heads are connected to the supporting feet to control the support device to move on the guide rails.

4. A method for constructing a ship lock navigation wall concrete slipform according to any one of claims 1 to 3, characterized in that: The jacking platform comprises a support block, a jack is fixed on the top of the support device, the other end of the jack is fixed to the bottom of the support block, and the top of the support block is connected to the vertical beam by a channel steel to form a column.

5. A method for constructing a ship lock navigation wall concrete slipform according to claim 4, characterized in that: A transverse plate is fixed on the inner sides of the two supporting devices, and when the jacking platform falls, the transverse plate is engaged with the template above.

6. A method for constructing a ship lock navigation wall concrete slipform according to claim 4, characterized in that: The tops of the two rows of formworks are fixed with channel steels to form vertical beams, and multiple channel steels are installed transversely and movably on the middle section of the vertical beams to form cross beams. Channel steels are installed transversely and movably at both ends of the vertical beams to form edge beams. One end of the cross beam and the edge beam is locked on a vertical beam, and the other end of the cross beam and the edge beam is fixed to another vertical beam through a movable groove and bolts. A first hydraulic rod is connected between the edge beam and the vertical beam, and a second hydraulic rod is connected between the cross beam and the vertical beam. The first hydraulic rod has a small load and serves as an auxiliary jacking and pulling power, and the second hydraulic rod has a large load and serves as the main jacking and pulling power.

7. A method for constructing a ship lock navigation wall concrete slipform according to claim 4, characterized in that: The material dividing device is installed on the top-pulling system and driven by a motor to move horizontally and rotate around the output end of the belt conveyor. The top surface of the material dividing device is a notch-shaped feed trough, and the bottom discharge trough is a funnel shape.

8. A method for constructing a ship lock navigation wall concrete slipform according to claim 4, characterized in that: The material distribution device is hoisted under the discharge chute by a hanging chain. The material distribution device is a hanging string tube structure. The material distribution device is composed of multiple sections of long-mouthed funnels connected in series by hanging chains. The length of the material distribution device is adjusted according to the concrete pouring height, and the material distribution device has a certain swing adjustment ability.

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