A slip form device and construction method for the second-stage concrete of a gate slot

Abstract

A slip form device and construction method for the second-stage concrete of a gate slot, which includes: a truss, a suspension and lifting system, an operation platform and a formwork device. The suspension and lifting system is arranged on the truss, the operation platform is arranged at the bottom of the suspension and lifting system, and the formwork devices are respectively arranged at both ends of the operation platform. The present invention has the following advantages: 1. Simple operation, simplifies the original construction process of the second-stage concrete of the gate slot, and improves the construction efficiency; 2. Reduces the construction intensity and construction investment, ensures construction safety, and has high economic benefits; 3. When there is local deviation in the first-stage concrete of the gate slot, the size of the second-stage formwork can be adjusted at any time to ensure the smooth lifting of the formwork body and improve the pouring quality; 4. Avoids the leakage of slip form concrete, reduces the slip form friction resistance, levels the excess concrete, and improves the concrete pouring quality; 5. Simple structure, can be disassembled and assembled repeatedly, and can be reused in different projects.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy and hydropower construction, and particularly relates to a slip form device and a construction method for secondary concrete of a gate slot. Background Art

[0002] With the continuous progress of China's scientific and technological strength, China's hydropower industry has also developed vigorously.

[0003] Nowadays, for pumped-storage power stations at home and abroad, the towers at the inlet and outlet and the gate slots of the water discharge buildings all require secondary concrete construction; the secondary concrete construction of the gate slot mainly includes layered formwork erection and pouring, and one-time formwork erection with layered reserved windows for pouring.

[0004] Layered formwork erection and pouring often have great difficulties in aspects such as concrete placing, layered surface treatment, and formwork reinforcement construction. It requires a large amount of labor, has many construction processes, low construction efficiency, and poor quality of the formed concrete; when pouring with one-time formwork erection and layered reserved windows, there are great limitations in concrete placing and vibration, and the reserved windows after pouring need to be treated again, making it difficult to ensure the quality of concrete construction. Moreover, when using both methods in construction, it is necessary to set up scaffolding for operation, which is not only time-consuming and laborious but also has great potential safety hazards. Therefore, how to make a slip form device and a construction method for secondary concrete of a gate slot that can solve the problems of the existing technology has become a technical problem to be solved. Summary of the Invention

[0005] Based on the above technical problems, the invention provides a slip form device and a construction method for secondary concrete of a gate slot. Compared with the existing technology, the invention adopts a hanging slip construction process, solves the problems of safety, quality, progress, etc. in the construction process of secondary concrete of the gate slot, and has the advantages of simple structure, economic applicability, and reasonable construction.

[0006] In view of this, the invention provides a slip form device for secondary concrete of a gate slot, which includes: a truss, a suspension and lifting system, an operation platform, and a formwork device. The suspension and lifting system is arranged on the truss, the operation platform is arranged at the bottom of the suspension and lifting system, and the formwork devices are respectively arranged at both ends of the operation platform.

[0007] In the above technical solution, preferably, the formwork device includes a first formwork arranged parallel to one side of the operation platform and a second formwork arranged perpendicular to one side of the operation platform through a connecting frame. The first formwork and the second formwork are mirror-image arranged on both sides of the truss.

[0008] In the above technical solution, preferably, the first formwork is arranged on the truss through a lead screw, and the second formwork is arranged on the connecting frame through a lead screw.

[0009] In the above technical solution, preferably, the suspension lifting system includes a lifting rod and a hydraulic jack sleeved on the lifting rod.

[0010] In the above technical solution, preferably, it further includes a guiding pouring frame, one end of the guiding pouring frame is connected to the lifting rod, and the other end of the guiding pouring frame is connected to the first formwork.

[0011] In the above technical solution, preferably, leveling plates are respectively arranged at the lower parts of the first formwork and the second formwork, and a gap for scraping off redundant concrete is arranged inside the leveling plates.

[0012] In the above technical solution, preferably, there are two groups of trusses, and two groups of the suspension lifting systems are respectively arranged on the two groups of trusses.

[0013] In the above technical solution, preferably, the widths of the first formwork and the second formwork are greater than the width of the gate slot opening, the materials of the first formwork and the second formwork are steel plates, and lubricant layers are respectively coated on the inner sides of the first formwork and the second formwork.

[0014] In the above technical solution, preferably, a guardrail is further arranged on the operation platform.

[0015] A construction method for a slip form device for the second-stage concrete of a gate slot includes the following steps: Step 1, erect the truss on the gate well, and suspend the operation platform between the gate slots to be poured on both sides under the gate well through the suspension lifting system; Step 2, adjust the lead screw to make the first formwork and the second formwork respectively fit completely with the first-stage concrete of the gate slot and the second-stage frame of the gate slot; Step 3, pour the concrete of the gate slot through the guiding pouring frame and vibrate the poured concrete; Step 4, when the concrete begins to set, use the suspension lifting system to lift the operation platform upward. At the same time, the leveling plate levels the setting concrete; Step 5, supplement lubricant inside the lifted formwork; Step 6, repeat Step 2, Step 3, Step 4, and Step 5 in sequence until all the concrete is poured.

[0016] The present invention provides a slip form device and construction method for the second-stage concrete of the gate slot. Compared with the prior art, the present invention has the following advantages: 1. Simple operation, simplifies the original construction process of the second-stage concrete of the gate slot, and improves construction efficiency; 2. Reduces construction intensity and investment, ensures construction safety, and has high economic benefits; 3. When there is local deviation in the first-stage concrete of the gate slot, the size of the second-stage formwork can be adjusted at any time to ensure the smooth lifting of the formwork body and improve the pouring quality; 4. Avoids slurry leakage of slip form concrete, reduces the slip form friction resistance, levels the excess concrete, and improves the concrete pouring quality; 5. Simple structure, can be disassembled and assembled repeatedly, and can be reused in different projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shows the overall structural schematic diagram of the present invention;

[0018] Figure 2 Shows the left view of the overall structure of the present invention;

[0019] Figure 3 Shows the top view of the connection structure between the operation platform and the gate slot;

[0020] In the figure: 1 truss, 2 operation platform, 3 first formwork, 4 connecting frame, 5 second formwork, 6 lead screw, 7 lifting rod, 8 hydraulic jack, 9 guiding pouring frame, 10 screed board, 11 gap, 12 guardrail, 13 first-stage concrete of the gate slot, 14 second-stage frame of the gate slot, 15 second-stage concrete of the gate slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the content disclosed below.

[0023] The following is in conjunction with such as Figure 1 、 Figure 2 and Figure 3 The technical solution of the present invention will be further described.

[0024] The first embodiment, such as Figure 1 、 Figure 2 and Figure 3As shown in the figure, a slip form device for the second-stage concrete of the gate slot includes: a truss 1, a suspension and lifting system, an operation platform 2 and a formwork device. The suspension and lifting system is arranged on the truss 1, the operation platform 2 is arranged at the bottom of the suspension and lifting system, and the formwork devices are respectively arranged at both ends of the operation platform 2. Since the cross-section of the gate slot is small, it is not conducive to the arrangement of jacks. Therefore, the hanging slip construction is adopted, and the operation platform 2 and the formwork device are lifted upward by the suspension and lifting system for slip form construction.

[0025] The formwork device includes a first formwork 3 arranged in parallel on one side of the operation platform 2 and a second formwork 5 vertically arranged on one side of the operation platform 2 through a connecting frame 4. The first formwork 3 and the second formwork 5 are mirror-image arranged on both sides of the truss 1, and the first formwork 3 and the second formwork 5 are arranged opposite to the formwork surface of the second-stage concrete 15 of the gate slot to ensure that the second-stage concrete 15 of the gate slot is slip-lifted and poured into a finished shape at one time.

[0026] The first formwork 3 is arranged on the truss 1 through a lead screw 6, and the second formwork 5 is arranged on the connecting frame 4 through a lead screw 6. The formwork is connected and positioned by the lead screw 6 to ensure its tight connection with the surface of the first-stage concrete 13 of the gate slot and the second-stage frame 14 of the gate slot; when there is a local deviation in the first-stage concrete 13 of the gate slot, the sizes of the first formwork 3 and the second formwork 5 can be adjusted at any time to ensure the smooth lifting of the formwork body; it ensures no leakage of slurry during pouring, improves the pouring quality; ensures the smoothness of the concrete joint and the first-stage concrete 13 of the gate slot; and also facilitates the positioning of the formwork body during the transfer of the formwork and the maintenance and replacement of the formwork.

[0027] The suspension and lifting system includes a lifting rod 7 and a hydraulic jack 8 sleeved on the lifting rod 7. The hydraulic jack 8 is arranged on the truss 1 and is connected to the operation platform 2 through the lifting rod 7. Its connection structure is simple and convenient for operation and use. It also includes a guiding pouring frame 9. One end of the guiding pouring frame 9 is connected to the lifting rod 7, and the other end of the guiding pouring frame 9 is connected to the first formwork 3. When the operation platform 2 is lifted, there is a certain frictional resistance between the formwork and the concrete surface, which may cause the formwork to shift; the guiding pouring frame 9 is provided to increase the stability of the formwork during the lifting process and avoid concrete defects caused by the formwork shift.

[0028] Smoothing plates 10 are respectively arranged at the lower parts of the first formwork 3 and the second formwork 5. A gap 11 for scraping off excess concrete is arranged inside the smoothing plates 10. The lower parts of the smoothing plates 10 are vertically flush with the inner sides of the first formwork 3 and the second formwork 5 respectively. The smoothing plates 10 are provided. During the lifting process of the operation platform 2, the smoothing plates 10 level the surface of the initial-set concrete, and the excess concrete is discharged from the gap 11, ensuring the flatness of the overall concrete surface.

[0029] There are two sets of the trusses 1, and two sets of the suspension lifting systems are respectively arranged on the two sets of the trusses 1. The lifting rods 7 on the suspension lifting systems are respectively connected to the operation platform 2, which increases the lifting stability of the operation platform 2 and ensures the lifting safety. The widths of the first formwork 3 and the second formwork 5 are greater than the width of the vertical formwork surface of the second-stage concrete 15 of the gate slot by 5 to 20 cm. The materials of the first formwork 3 and the second formwork 5 are steel plates. Lubricant layers are respectively coated on the inner sides of the first formwork 3 and the second formwork 5, which effectively avoids formwork leakage and adhesion of the steel formwork to the concrete. A guardrail 12 is also arranged on the operation platform 2 to protect the safe construction of the construction personnel.

[0030] A construction method for a slip form device for the second-stage concrete of a gate slot is characterized by including the following steps: Step 1, erect the truss 1 on the gate well, and suspend and lift the operation platform 2 between the gate slots to be poured on both sides under the gate well through the suspension lifting system; Step 2, adjust the lead screw 6 to make the first formwork 3 and the second formwork 5 fully fit with the first-stage concrete 13 of the gate slot and the second-stage frame 14 of the gate slot respectively; Step 3, pour the gate slot concrete through the guiding pouring frame 9 and vibrate the poured concrete; Step 4, when the concrete begins to set, use the suspension lifting system to lift the operation platform 2 upward. At the same time, the screeding board 10 levels the setting concrete; Step 5, supplement lubricant inside the lifted formwork; Step 6, sequentially repeat Step 2, Step 3, Step 4 and Step 5 until all the concrete is poured.

[0031] The power device of the suspension lifting system is a 10-ton special slip form jack controlled by a ZYXT--36 type automatic leveling hydraulic control console; the concrete is transported to the construction site by the batching plant, and the concrete pouring adopts the method of discharging materials with a 25t crane lifting a 0.6mm³ lifting bucket; the construction personnel go up and down with a ZPL630 type anti-falling self-locking finished hanging basket, and the hanging basket is evenly loaded with a rated load of 630 kg.

[0032] The lifting rod 7 uses a d = 48mm steel pipe with a wall thickness of 3.5mm hot-rolled seamless steel pipe as the outer sleeve lifting rod 7, and a d = 32mm steel pipe with a wall thickness of 3.0mm hot-rolled seamless steel pipe as the inner embedded lifting rod 7. One end of the outer sleeve lifting rod 7 is sleeved outside one end of the inner embedded lifting rod 7 and then perforated, and a d = 16mm steel bar is used as a pin and welded and polished flat to ensure passing through the jack; when the device is demolished, it can be disassembled separately at the welding place.

[0033] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A slip form device for the second-stage concrete of the gate slot, characterized in that: It includes a truss, a suspension lifting system, an operating platform and a formwork device. The suspension lifting system is arranged on the truss, the operating platform is arranged at the bottom of the suspension lifting system, and the formwork devices are respectively arranged at both ends of the operating platform; the formwork device includes a first formwork arranged in parallel on one side of the operating platform and a second formwork vertically arranged on one side of the operating platform through a connecting frame. The first formwork and the second formwork are mirror-symmetrically arranged on both sides of the truss; the first formwork is arranged on the truss through a lead screw, and the second formwork is arranged on the connecting frame through a lead screw; it also includes a guiding pouring frame. One end of the guiding pouring frame is connected to the lifting rod, and the other end of the guiding pouring frame is connected to the first formwork; the widths of the first formwork and the second formwork are greater than the width of the gate slot opening. The materials of the first formwork and the second formwork are steel plates, and lubricant layers are respectively coated on the inner sides of the first formwork and the second formwork; the suspension lifting system includes a lifting rod and a hydraulic jack sleeved on the lifting rod; the lifting rod includes an outer sleeve lifting rod and an inner embedded lifting rod. One end of the outer sleeve lifting rod is sleeved on the outside of one end of the inner embedded lifting rod and then perforated, and a steel bar is used as a retaining pin.

2. The slipform device for the second-stage concrete of the gate slot according to claim 1, characterized in that: Smoothing plates are respectively arranged at the lower parts of the first formwork and the second formwork, and gaps for scraping off excess concrete are arranged inside the smoothing plates.

3. The slipform device for the second-stage concrete of the gate slot according to claim 2, characterized in that: There are two groups of the trusses, and two groups of the suspension lifting systems are respectively arranged on the two groups of the trusses.

4. The slipform device for the second-stage concrete of the gate slot according to claim 3, characterized in that: A guardrail is also arranged on the operating platform.

5. The construction method of the slip form device for the second-stage concrete of the gate slot according to any one of claims 1 to 4, characterized in that, It includes the following steps: Step 1: Erect the truss on the gate well, and suspend the operating platform between the gate slots to be poured on both sides under the gate well through the suspension lifting system; Step 2: Adjust the lead screws to make the first formwork and the second formwork fully fit with the first-stage concrete of the gate slot and the second-stage frame of the gate slot respectively; Step 3: Pour the gate slot concrete through the guiding pouring frame and vibrate the poured concrete; Step 4: Wait until the concrete begins to set, use the suspension lifting system to lift the operating platform upward. At the same time, the smoothing plates level the setting concrete; Step 5: Supplement lubricant inside the lifted formwork; Step 6: Repeat Step 2, Step 3, Step 4 and Step 5 in sequence until all the concrete is poured.

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