Concrete body type optimization system suitable for arc-shaped bottom plate of large-span arc-shaped discharge chute

Abstract

The utility model relates to the field of engineering construction, in particular to an arc-shaped bottom plate concrete body shape optimizing system suitable for a large-span arc-shaped discharge chute, which comprises a warehousing system and a slip form system, the warehousing system comprises a negative pressure articulated chute, a collection hopper, a chute, a concrete tank car and a ground pump, and the collection hopper is connected with the discharge end of the negative pressure articulated chute. The chute is connected with the discharging end of the collecting hopper, the discharging end of the chute is connected with a feeding port of the concrete tank car, a discharging port of the concrete tank car is connected with a feeding port of the ground pump, and a concrete conveying pipe is arranged at a discharging port of the ground pump. The sliding formwork system comprises a rail assembly and a sliding formwork assembly, and the rail assembly is in an arc shape matched with the arc-shaped bottom plate. The optimization system is novel in structure, reasonable in design, convenient to operate and high in safety, the concrete construction quality is guaranteed, common quality problems are avoided, the abrasion resistance and overall stability of the structural joint are improved, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the field of engineering construction, in particular to a concrete shape optimization system for the arc-shaped bottom slab of a large-span arc-shaped discharge chute. Background Technique

[0002] At present, since the discharge chute is usually below the left and right bank platforms of the water discharge structure and belongs to a deep foundation pit, there are no cable cranes and other lifting equipment during the operation period of the power station, and it is difficult to place the concrete into the bin. In order to ensure the performance of the concrete, ensure the slump and workability, the construction of the concrete washout repair of the discharge chute bottom slab is difficult and has high technical requirements. Usually, the width of the discharge chute is large, and it is difficult to transfer the slip form equipment for pouring, and the construction risk is high.

[0003] Due to the different design structural forms and geographical locations of each power station, the construction technologies are also different. For the construction conditions of the restoration of the concrete shape of the ultra-deep and large-span discharge chute and the arc-shaped bottom slab, there are technical problems such as difficult concrete placement in the deep discharge chute, difficult transfer of the slip form in the large-span discharge chute, and difficult quality control of concrete pouring in the ultra-deep discharge chute, as well as the problems of poor anti-abrasion and anti-seepage capabilities of the new and old concrete plates. At present, there is no systematic construction plan in this construction field, and the technical levels are uneven. Therefore, it is imperative to seek an economic and reasonable construction method for the concrete washout repair of the discharge chute. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the problems existing in the prior art, and to provide a concrete shape optimization system for the arc-shaped bottom slab of a large-span arc-shaped discharge chute. The optimization system has a novel structure and reasonable design. The construction method is convenient to operate, has strong safety, ensures the concrete construction quality, avoids the occurrence of common quality problems, improves the anti-abrasion ability of the structural joint and the overall stability, and has strong practicability.

[0005] The technical solution of the utility model is realized as follows: A concrete shape optimization system for the arc-shaped bottom slab of a large-span arc-shaped discharge chute includes a placing system. The placing system includes a negative pressure chute, an aggregate hopper, a chute, a concrete mixer truck and a ground pump. The aggregate hopper is connected to the discharge end of the negative pressure chute. The chute is connected to the discharge end of the aggregate hopper. The discharge end of the chute is connected to the feed inlet of the concrete mixer truck. The discharge outlet of the concrete mixer truck is connected to the feed inlet of the ground pump. The discharge outlet of the ground pump is provided with a concrete delivery pipe, and the output end of the concrete delivery pipe is provided with a slip form system.

[0006] Preferably, it further includes an arc-shaped bottom plate. The slip form system includes a track assembly and a slip form assembly. The track assembly is arranged on both sides of the arc-shaped bottom plate. The shape of the track assembly is an arc matching the arc-shaped bottom plate. The track assembly includes columns and "I"-shaped tracks, and the columns and the "I"-shaped tracks are connected by connectors; the slip form assembly includes a support frame and a bottom plate. An operation platform is arranged at the rear end of the support frame, and chucks matching the "I"-shaped tracks are arranged on both sides of the support frame; the front end of the slip form assembly is connected to an anchor point arranged at the top of the discharge chute through a hoist chain.

[0007] Preferably, both the track assembly and the slip form assembly are of a spliced structure.

[0008] Preferably, a stud is arranged at the lower end of the connector. A threaded hole matching the column is arranged above the column. A backing plate is arranged above the stud. The width of both sides of the backing plate is greater than the width of the column and is the same as the width of the "I"-shaped track. Both sides of the backing plate are connected to the "I"-shaped track by bolts.

[0009] Preferably, the "I"-shaped track is of a spliced type, and adjacent "I"-shaped tracks are connected by fixing plates and bolts arranged on the upper and lower sides.

[0010] Preferably, a lubricating device is arranged at the end of the chuck. The lubricating device includes a spherical lubricating cavity and a lubricating ball. The lubricating cavity is arranged at the end of the chuck. A clamping hole is arranged at the end of the lubricating cavity. The diameter of the clamping hole is smaller than the diameter of the lubricating cavity. A lubricating ball is arranged in the lubricating cavity. An elastic member connected to the lubricating ball is arranged in the lubricating cavity. The diameter of the lubricating ball is smaller than the diameter of the lubricating cavity.

[0011] Preferably, the support frame is of a spliced type, and both sides of adjacent support frames are connected by "L"-shaped steel plates and bolts.

[0012] Preferably, one side of the operation platform is connected to the rear end of the support frame, and the other side is a free end. The position of the operation platform is higher than the position of the bottom plate, and a safety fence is arranged around the operation platform.

[0013] The present utility model provides an arc-shaped bottom plate concrete body shape optimization system for a large-span arc-shaped discharge chute. Compared with the prior art, the present utility model has the following advantages:

[0014] 1. By designing a new feeding system and a slip form system, this system provides a system structure with reasonable structure and novel design, strong operability of the construction process, and easy control of the construction quality;

[0015] 2. The system adopts a warehousing method that combines multiple systems, overcomes the high head drop, ensures the quality of the concrete in the warehouse, and is conducive to the concrete warehousing process with a large chute depth;

[0016] 3. The slip form assembly of the system is of a spliced type, which is convenient for construction in the case of a large chute span, conducive to the control of the concrete pouring quality of the ultra-deep chute, and the anti-abrasion and anti-seepage capabilities of the new and old concrete slabs;

[0017] 4. The improved slip form construction of the system is convenient, highly efficient, has controllable deflection deformation, and ensures safety;

[0018] 5. The system adopts the method of double guide chains and multi-anchoring point circulation, ensuring the safe and reliable movement of the slip form between the left and right banks, enhancing the anti-abrasion ability and overall stability of the structural joints of the newly poured slabs, and providing a reference experience for the restoration construction of the damaged concrete shape of the arc bottom slab of the ultra-deep and large-span chute. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view schematic diagram of the warehousing system.

[0020] Figure 2 It is the front view schematic diagram of the slip form system.

[0021] Figure 3 It is the top view schematic diagram of the slip form system.

[0022] Figure 4 It is the side view connection schematic diagram of the track assembly.

[0023] In the figure: 1 - warehousing system, 11 - negative pressure chute, 12 - aggregate hopper, 13 - chute, 14 - concrete truck, 15 - ground pump, 16 - concrete delivery pipe; 2 - slip form system. 3 - track assembly, 31 - column, 32 - "I"-shaped track, 33 - connecting piece, 34 - stud, 35 - threaded hole, 36 - backing plate, 37 - fixing plate. 4 - slip form assembly, 41 - support frame, 42 - bottom plate, 43 - operation platform, 44 - "L"-shaped steel plate, 45 - safety fence, 46 - chuck, 47 - lubrication device, 48 - lubrication cavity, 49 - lubricating ball, 50 - clamping hole, 51 - elastic part. DETAILED DESCRIPTION OF THE INVENTION

[0024] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" 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 a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0026] Embodiment 1: An optimized system for the concrete shape of the arc-shaped bottom slab of a large-span arc-shaped discharge chute, as Figures 1-4 shown, includes a feeding system 1 and a slip form system 2. The feeding system 1 includes a negative pressure chute 11, an aggregate hopper 12, a chute 13, a concrete truck 14, and a ground pump 15. The aggregate hopper 12 is connected to the discharge end of the negative pressure chute 11, the chute 13 is connected to the discharge end of the aggregate hopper 12, the discharge end of the chute 13 is connected to the feeding port of the concrete truck 14, the discharge port of the concrete truck 14 is connected to the feeding port of the ground pump 15, and a concrete delivery pipe 16 is provided at the discharge port of the ground pump 15. The concrete is transported to the aggregate hopper 12 through the concrete truck, the ground pump, and the negative pressure chute, and then transported into the concrete bin number through the chute, solving the problem of difficult concrete feeding in a remote, large-span, and deep environment.

[0027] The slip form system 2 includes an orbital component 3 and a slip form component 4. Both the orbital component 3 and the slip form component 4 are of a spliced type. The orbital component 3 is arranged on both sides of the arc-shaped bottom plate. The shape of the orbital component 3 is an arc that matches the arc-shaped bottom plate. The orbital component 3 includes a column 31 and an "I"-shaped track 32. The "I"-shaped track 32 is of a spliced type, and adjacent "I"-shaped tracks 32 are connected by fixing plates 37 and bolts arranged on the upper and lower sides. The column 31 and the "I"-shaped track 32 are connected by a connecting piece 33. A stud 34 is arranged at the lower end of the connecting piece 33. A threaded hole 35 matching the column 31 is arranged above the column 31. A backing plate 36 is arranged above the stud 34. The width of both sides of the backing plate 36 is greater than the width of the column 31 and is the same as the width of the "I"-shaped track 32. Both sides of the backing plate 36 are connected to the "I"-shaped track 32 by bolts. When the connecting piece 33 is assembled, it is first connected to the column 31, then the column is fixed to the base surface, and finally the orbital component 3 is connected. The spliced structure of the orbital assembly 3 makes the overall arc of the track match the arc of the arc-shaped floor, enabling the natural transition of the pouring process of the slip form system 2 with the arc of the arc-shaped bottom plate.

[0028] The slip form component 4 includes a support frame 41 and a bottom plate 42. An operation platform 43 is arranged at the rear end of the support frame 41. The support frame 41 is of a spliced type. The two sides of adjacent support frames 41 are connected by "L"-shaped steel plates 44 and bolts, making the support frame 41 firmly connected. Formwork baffles are arranged on both sides of the support frame 41. The formwork baffles and the bottom plate form a cavity, which functions as a concrete formwork. The operation platform 43 is supported by support steel pipes fixedly connected to the support frame 41. One side of the operation platform 43 is connected to the rear end of the support frame 41, and the other side is a free end. The position of the operation platform 43 is higher than the position of the bottom plate 42. A safety fence 45 is arranged around the operation platform 43. The operation platform 43 can facilitate personnel to vibrate and finish the surface of the poured concrete. Clamping heads 46 matching the "I"-shaped track are arranged on both sides of the support frame 41. After the clamping heads 46 are connected to the "I"-shaped track 32, they can be clamped with the "I"-shaped track, and at the same time, the support frame 31 can be moved along the "I"-shaped track 32. A lubricating device 47 is arranged at the end of the clamping head 46. The lubricating device 47 includes a spherical lubricating cavity 48 and a lubricating ball 49. The lubricating cavity 48 is arranged at the end of the clamping head 46. A clamping hole 50 is arranged at the end of the lubricating cavity 48. The diameter of the clamping hole 50 is smaller than the diameter of the lubricating cavity 48. The lubricating ball 49 is connected to the lubricating cavity 48 through an elastic member 51. The diameter of the lubricating ball 48 is smaller than the diameter of the lubricating cavity 48 but larger than the diameter of the clamping hole 50. Under the pressure of the elastic member 51, the lubricating ball 49 abuts against the clamping hole 50. When the slip form moves, the lubricating ball 49 extends out of the clamping hole under the pressure of the elastic member and contacts the "I"-shaped track, improving the overall sliding efficiency. The front end of the slip form component 4 is connected to an anchoring point arranged at the top of the discharge chute through a chain block, and the whole slip form is driven to move through the chain block.

[0029] A construction method for optimizing the concrete shape of the arc-shaped bottom slab of a large-span arc-shaped discharge chute, comprising the following steps:

[0030] (1) Installation of the feeding system

[0031] The negative pressure chute pipe 11 is fixed on the guide wall by steel hoop clamps. The negative pressure chute pipe 11 is assembled by multiple conduits, and the conduits are connected by gaskets and hoop clamps. The surface layer of the negative pressure chute pipe 11 is coated with asphalt waterproof coating to ensure the airtightness of the negative pressure chute pipe 11; a rubber hose is used for buffering at the tail of the negative pressure chute pipe 11. The discharging end of the negative pressure chute pipe 11 is connected to the aggregate hopper 12, the discharging end of the aggregate hopper 12 is connected to the chute 13, the discharging end of the chute 13 is connected to the feeding port of the concrete mixer truck 14, the discharging port of the concrete mixer truck 14 is connected to the feeding port of the ground pump 15, and a concrete delivery pipe 16 is arranged at the discharging port of the ground pump 15. The ground pump 15 remixes the concrete and then transports it into the bin number;

[0032] (2) Installation of the slip form system

[0033] The support frame 41 of the slip form assembly adopts a truss structure. The frame is made of channel steel, and the support system is made of angle iron. One unit is 3 - 5m, and the adjacent units are spliced and connected by "L"-shaped steel plates 44 and high-strength screws; a bottom plate 42 is arranged at the bottom of the slip form assembly, and concrete precast slabs are used for counterweight on the bottom plate 42; an operation platform 43 is arranged at the rear end of the support frame 41, and chucks 46 matching the "I"-shaped track 32 are arranged on both sides of the support frame 41; the front end of the slip form assembly is connected to the anchor point set at the top of the discharge chute by a manual chain hoist. Two 10L chain hoists are used for pulling the slip form, and 5L anti-overturning chain hoists are used in the middle. A φ16 round steel pull ring is welded on the front end of the slip form assembly, and the chain hoist is connected to the round steel pull ring by a steel wire rope. After the slip form assembly is pulled to the top, anchor points are set in the upstream area, and the slip form is transferred by the way of oblique pulling with chain hoists and steel wire ropes;

[0034] The track assembly is arranged on both sides of the arc-shaped bottom slab concrete pouring area. The track assembly includes columns 31 and "I"-shaped tracks 32. The columns 31 and the "I"-shaped tracks 32 are connected by connectors 33. The tracks are processed by a bending machine. The two track steels are connected by fixing plates 37. The tracks are connected by cut bolts according to the corresponding coordinates deduced from the curve equation. For the convenience of transportation and installation, each section is 6m long and assembled in sections, so that the shape of the track assembly is an arc matching the arc-shaped bottom slab; after the track assembly is installed, the slip form assembly is assembled with the track assembly. Chucks 46 matching the "I"-shaped track 32 are arranged on both sides of the support frame 41 of the slip form assembly;

[0035] After the slip form system is installed, an empty-load test of the slip form system is carried out;

[0036] (3)Concrete pouring

[0037] For the pouring area, the steel bar grid is fabricated and installed. After the steel bar grid is completed, the concrete transported by the ground pump of the feeding system in step (1) is transported to the pouring bay number. When using slip form pouring, first fill the space at the bottom of the slip form completely, and then continue to pour upstream to let the concrete flow by itself to form a slope. During the pouring process, vibration is carried out until the slurry comes out from the exhaust holes at the bottom of the slip form and then stops; after the vibration is completed, preliminary leveling and plastering are carried out, and a wooden trowel is used for secondary plastering and slurry extraction. After the surface layer of the concrete is initially solidified, an iron trowel is used for surface pressing and smoothing, and the unevenness is controlled within 3 mm to ensure the smoothness of the flow surface without defects such as air bubbles, pitted surfaces and staggered platforms;

[0038] After the concrete pouring is completed, the concrete is cured to keep the surface of the concrete wet.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, 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 concrete shape optimization system for large-span curved trough and curved bottom plate, characterized by: The invention comprises a warehousing system, wherein the warehousing system comprises a negative pressure chute, a collecting hopper, a chute, a concrete tanker and a ground pump, wherein the collecting hopper is connected to the discharge end of the negative pressure flow pipe, the chute is connected to the discharge end of the collecting hopper, the discharge end of the chute is connected to the feed port of the concrete tanker, the discharge port of the concrete tanker is connected to the feed port of the ground pump, the discharge port of the ground pump is provided with a concrete conveying pipe, the output end of the concrete conveying pipe is provided with a slipform system, and further comprises an arc bottom plate, wherein the slipform system comprises a track assembly and a slipform The component comprises a track component arranged on both sides of the arc bottom plate, the shape of the track component is an arc that matches the arc bottom plate, the track component comprises a column and an "I"-shaped track, and the column and the "I"-shaped track are connected by a connector; the slide mold component comprises a support frame and a bottom plate, the rear end of the support frame is provided with an operating platform, and both sides of the support frame are provided with clamps that match the "I"-shaped track; the front end of the slide mold component is connected to an anchor point arranged at the top of the chute through a guide chain.

2. According to claim 1, a concrete shape optimization system for large-span curved trough curved bottom plate, characterized in that: The track assembly and the slide assembly are both spliced ​​structures.

3. The system for optimizing the concrete shape of a large-span curved chute and curved bottom plate according to claim 2, characterized in that: A stud is arranged at the lower end of the connecting piece, a threaded hole matching the column is arranged above the column, a pad is arranged above the stud, the width of both sides of the pad is greater than the width of the column and is the same as the width of the "I"-shaped track, and both sides of the pad are connected to the "I"-shaped track by bolts.

4. The system for optimizing the concrete shape of a large-span curved chute and curved bottom plate according to claim 3, characterized in that: The "I"-shaped track is a spliced ​​type, and adjacent "I"-shaped tracks are connected by fixing plates and bolts arranged on the upper and lower sides.

5. The concrete shape optimization system for large-span curved trough curved bottom plate according to claim 4, characterized in that: A lubrication device is provided at the end of the chuck, and the lubrication device includes a spherical lubrication cavity and a lubrication ball. The lubrication cavity is provided at the end of the chuck, and a clamping hole is provided at the end of the lubrication cavity. The diameter of the clamping hole is smaller than the diameter of the lubrication cavity. A lubrication ball is provided in the lubrication cavity. The lubrication cavity is provided with a lubrication ball and an elastic member connected thereto, and the diameter of the lubrication ball is smaller than the diameter of the lubrication cavity.

6. The system for optimizing the concrete shape of a large-span curved chute and curved bottom plate according to claim 5, characterized in that: The support frames are of a spliced ​​type, and the two sides of adjacent support frames are connected by "L"-shaped steel plates and bolts.

7. The concrete shape optimization system for large-span curved trough curved bottom plate according to claim 6, characterized in that: One side of the operating platform is connected to the rear end of the supporting frame, and the other side is a free end. The position of the operating platform is higher than that of the bottom plate, and a safety fence is arranged around the periphery of the operating platform.

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