A method for fast formwork erection and dismantling of a horizontal structure of a nuclear island plant building

Abstract

The application discloses a kind of fast formwork erection and dismantling methods of nuclear island plant horizontal structure, comprising the following steps: first step: moving lifting mechanism, lifting the tray of lifting mechanism holds frame platform lower mouth;Second step: adjust the adjusting mechanism on the suspension shoe, loosen the support stress of suspension shoe to frame platform;Third step: remove suspension shoe and adjusting mechanism, fold off climbing cone;Fourth step: lower lifting mechanism to the position of manual wood mold plate and frame platform;Fifth step: remove, decompose wood mold plate, remove wooden i beam;Sixth step: remove, decompose frame platform;Seventh step: remove the wood mold plate of adsorbing horizontal structure lower end face. With the help of lifting mechanism, fast formwork dismantling is realized, and the formwork dismantling process is safe. The lifting trolley and the support system (wood mold plate, wooden i beam, frame platform, excluding the outer mold plate of wood mold plate and the detachable part) carried on the lifting trolley can be moved to the next process together, construction can be carried out, construction efficiency can be provided, and repeated disassembly is not needed.

Description

TECHNICAL FIELD

[0001] The application relates to a form removal technology of a horizontal structure of a building, in particular to a fast form removal and dismantling method of a horizontal structure of a nuclear island plant. BACKGROUND

[0002] The nuclear island plant of a nuclear power plant is generally divided into a reactor plant, a nuclear fuel plant and a nuclear auxiliary plant according to process needs, and is generally in the form of multiple floors and multiple rooms. During the construction of the nuclear power plant, a large number of auxiliary equipment needs to be introduced and installed into the nuclear island plant. Due to the complex layout of the nuclear island plant and the small number of access ports into the island, the equipment transportation path is long. In addition, a large number of concrete partition walls are arranged in the nuclear island plant as physical isolation boundaries or radiation shielding bodies, further increasing the length of the equipment transportation channel and making the transportation channel more tortuous. Therefore, during the construction of the plant, the transportation workload of the numerous auxiliary equipment to the specified area and location is large.

[0003] The nuclear island plant is generally constructed in a vertical structure first, and then the horizontal structure of the plant is constructed. The traditional horizontal structure construction method is to adopt a full-support formwork system, which brings more difficulties to equipment transportation.

[0004] In view of the construction of the special equipment transportation channel of the horizontal structure of the nuclear island plant during the construction process, the application designs a fast form removal and dismantling method of the horizontal structure of the nuclear island plant without support, which can solve the problem of inconvenient equipment transportation of the full-support formwork of the horizontal structure. In the form removal method, the wood formwork is generally an integral formwork after assembly. Therefore, in order to quickly remove the formwork, a new fast form removal method is realized. SUMMARY

[0005] The application designs a fast form removal and dismantling method of the horizontal structure of the nuclear island plant, and realizes fast form removal by means of a lifting trolley.

[0006] The technical scheme disclosed by the application is as follows: a fast form removal and dismantling method of the horizontal structure of the nuclear island plant, comprising the following steps:

[0007] Step 1: move the lifting mechanism, and lift the tray of the lifting mechanism to support the lower opening of the frame platform;

[0008] Step 2: adjust the adjusting mechanism on the suspension shoe, and loosen the support stress of the suspension shoe on the frame platform;

[0009]

[0009] Step 3: remove the suspension shoe and the adjusting mechanism, and fold the climbing cone;

[0010] Step 4: lower the lifting mechanism to a position at which the wood formwork and the frame platform can be manually disassembled;

[0011] Step 5: remove and disassemble the wood formwork, and remove the wooden I-beam;

[0012] Sixth step: dismantle and disassemble the frame platform;

[0013] Seventh step: dismantle the wooden formwork at the lower end of the adsorbing horizontal structure.

[0014] On the basis of the above scheme, as a preferred, the lifting mechanism is a lifting trolley or a scissor support platform or a telescopic rod structure.

[0015] On the basis of the above scheme, as a preferred, the lifting trolley comprises a chassis, vertical guide rails are fixedly installed on the chassis, a tray is installed on the vertical guide rails, the tray is driven by a driving mechanism to move up and down along the vertical guide rails, the vertical guide rails are two oppositely arranged C-shaped steel, the tray comprises a body support, square tubes are fixedly installed on the two sides of the body support, rollers are installed on the square tubes, the rollers protrude from three sides of the square tubes that are not in direct contact with the body support to form a rolling fit between the C-shaped steel, and a receiving part for fixedly connecting with the frame platform is fixedly installed on the body support.

[0016] On the basis of the above scheme, as a preferred, the vertical guide rails are slidably installed on an outer frame, the outer frame is C-shaped steel, and the chassis is fixedly installed on the lower end face of the outer frame.

[0017] On the basis of the above scheme, as a preferred, the wooden formwork comprises an inner side formwork installed on the wooden I-beam and an outer side formwork located outside the inner side formwork for contacting with the vertical structure, and the inner side formwork is a removable part located directly above the vertical guide rails.

[0018] On the basis of the above scheme, as a preferred, the fourth step comprises 4.1: retracting the lifting trolley by a distance; 4.2: removing the removable part directly above the vertical guide rails of the lifting trolley to form a channel for the tray to descend; and 4.3: continuing to move the tray downward to lower the overall formwork system to a position where the wooden formwork and the frame platform can be easily disassembled by hand.

[0019] On the basis of the above scheme, as a preferred, the wooden I-beam and the frame platform are also removable parts located directly above the vertical guide rails.

[0020] On the basis of the above scheme, as a preferred, the adjusting mechanism is a threaded rod, the suspension shoe comprises at least a front end plate, an upper end plate, and a lower end plate, the front end plate is detachably fixedly connected with the anchor point embedded part, the upper end plate and the lower end plate have a spacing therebetween, the threaded rod is threadedly connected with the upper end plate, and the upper end of the threaded rod is fixedly connected with the frame platform.

[0021] On the basis of the above scheme, as a preferred, the lower end face or the upper end face of the upper end plate is fixedly installed with a nut, the threaded rod is threadedly connected with the nut, the lower end of the threaded rod has a protruding part, the upper end of the threaded rod is fixedly installed with a support plate, and the support plate is fixedly connected with the frame platform by bolts.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] Through the rapid formwork disassembly of the lifting trolley, the rapid transfer and disassembly of the entire formwork system can be realized.

[0024] Through the design of the removable part formed on the wood formwork and the vertical guide rail cooperating with the outer frame, the lifting of the lifting trolley is not affected, the lifting trolley can be maximally lowered, and the manual disassembly of the formwork system (frame platform, wooden I-beam, wood formwork) is facilitated, and the disassembly process is safe and fast.

[0025] The lifting trolley and the support system (wood formwork, wooden I-beam, frame platform, excluding the outer formwork of the wood formwork and the removable part) carried on the lifting trolley can be moved to the next process (the construction environment is the same or basically the same) together for construction, which can provide construction efficiency without repeated disassembly. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of the first step of formwork support;

[0027] Figure 2 is an A-A schematic diagram of Figure 1 ;

[0028] Figure 3 is a structural schematic diagram of the second step of formwork support;

[0029] Figure 4 is an A-A schematic diagram of Figure 3 ;

[0030] Figure 5 is a structural schematic diagram of the third step of formwork support;

[0031] Figure 6 is an A-A schematic diagram of Figure 5 ;

[0032] Figure 7 is a structural schematic diagram of the fourth step of formwork support;

[0033] Figure 8 is an A-A schematic diagram of Figure 7 ;

[0034] Figure 9 is a B-B schematic diagram of Figure 7 ;

[0035] Figure 10 is a structural schematic diagram of the fifth step of formwork support;

[0036] Figure 11 is an A-A schematic diagram of Figure 10 ;

[0037] Figure 12is the structural schematic diagram of the sixth step of formwork support;

[0038] Figure 13 is the A-A schematic diagram of Figure 12

[0039] Figure 14 is the structural schematic diagram of the seventh step of formwork support;

[0040] Figure 15 is the A-A schematic diagram of Figure 14

[0041] Figure 16 is the structural schematic diagram of the hanging shoe;

[0042] Figure 17 is the structural schematic diagram of the first step of formwork removal;

[0043] Figure 18 is the structural schematic diagram of the second step of formwork removal;

[0044] Figure 19 is the structural schematic diagram of the third step of formwork removal;

[0045] Figure 20 is the structural schematic diagram of the fourth step 4.1 of formwork removal;

[0046] Figure 21 is the structural schematic diagram of the fourth step 4.2 of formwork removal;

[0047] Figure 22 is the structural schematic diagram of the fourth step 4.3 of formwork removal;

[0048] Figure 23 is the structural schematic diagram of the fifth step of formwork removal;

[0049] Figure 24 is the structural schematic diagram of the sixth step of formwork removal;

[0050] Figure 25 is the structural schematic diagram of the seventh step of formwork removal;

[0051] Figure 26 is the structural schematic diagram of the tray;

[0052] Figure 27 is the perspective view of the lifting trolley Figure 1 ;

[0053] Figure 28 is the perspective view of the lifting trolley Figure 2 ;

[0054] Figure 29 is the front view of the lifting trolley. DETAILED DESCRIPTION

[0055] ​​In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, specific implementation manners of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0056] Formwork

[0057] As Figures 1-16 shown, the first step: according to the construction standardization design of the nuclear island plant project. In the design of the plant horizontal structure construction scheme of the confirmed equipment transportation channel, the space position of the channel concrete floor is calculated, the attachment anchor point position of the template support frame platform (composed of several steel beams) is set, and the pre-buried work of the attachment anchor buried part is carried out when the plant vertical structure 1 is constructed. Each anchor point should be at the same horizontal elevation.

[0058] The second step: after the vertical structure is removed, the suspension shoe 4 is installed at the anchor point, and the suspension shoe and the climbing cone 2 of the attachment anchor buried part are fixedly connected by the fixing bolt.

[0059] The third step: installing the frame platform on the suspension shoe. Specifically, the adjusting mechanism which can adjust the height in the up-down direction is installed on the suspension shoe, the adjusting mechanism is detachably fixedly connected with the frame platform 5, and the frame platform is fixedly formed by several steel beams.

[0060] The adjusting mechanism is a threaded rod, the suspension shoe at least includes a front end plate 6, an upper end plate 7 and a lower end plate 8, the front end plate is detachably fixedly connected with the attachment anchor buried part, the upper end plate and the lower end plate have a spacing, the threaded rod 11 is threadedly connected with the upper end plate, the upper end of the threaded rod is fixedly connected with the steel beam of the frame platform, the lower end face or the upper end face of the upper end plate is fixedly installed with a nut 9, the threaded rod is threadedly connected with the nut, the lower end of the threaded rod has a protruding part, the upper end of the threaded rod is fixedly installed with a support plate 10, and the support plate is fixedly connected with the frame platform by the bolt.

[0061] The fourth step: arranging the wooden I-beam 12 on the frame platform, the spacing is not more than 200 MM, and the frame platform and the wooden I-beam have a spacing with the vertical structure.

[0062] The fifth step: arranging the wooden formwork 13 on the wooden I-beam, the wooden formwork includes an inner side formwork installed on the wooden I-beam and an outer side formwork located outside the inner side formwork and used for contacting the vertical structure, and the inner side formwork is fixedly connected with the wooden I-beam by the adsorption type fixing or the bolt fixing.

[0063] The inner side formwork can be fixed on the wooden I-beam by bolts or directly placed on the wooden I-beam, and the outer side formwork is placed on the wooden I-beam, after the concrete is poured, the inner side formwork is integrally moved downward by means of the formwork dismantling and lifting trolley, and can be transported to the next process as a whole, improving the efficiency, and the outer side formwork is adhered to the lower end face of the horizontal structure, and the outer side formwork can be separated by knocking.

[0064] Step 6: At this point, the horizontal structure 3 is completed, and the horizontal structure 3 steel bar 14 is bundled.

[0065] Step 7: Perform horizontal structure 3 concrete pouring construction.

[0066] The "nuclear island plant horizontal structure free support fast formwork system" is a set of "new concept construction method", which is a construction method for setting up a special equipment transportation channel for the nuclear island plant horizontal structure during construction. To solve the problem of full support formwork equipment transportation of horizontal structure. It can also realize fast formwork construction of horizontal structure under any "wall first and board later" construction sequence. The whole free support fast formwork system adopts modular design and can be combined and assembled at will, which is suitable for different width and height of horizontal structure construction requirements.

[0067] The formwork system of the system adopts: 20mm film mulching multi-layer wood formwork + H20 wooden I-beam as the keel + frame platform + suspension boot + embedded part form.

[0068] The "nuclear island plant horizontal structure free support fast formwork system" is a set of "new concept construction method", which is a construction method for setting up a special equipment transportation channel for the nuclear island plant horizontal structure during construction. To solve the problem of full support formwork equipment transportation of horizontal structure. It can also realize fast formwork construction of horizontal structure under any "wall first and board later" construction sequence. The whole free support fast formwork system adopts modular design and can be combined and assembled at will, which is suitable for different width and height of horizontal structure construction requirements.

[0069] The "nuclear island plant horizontal structure free support fast formwork system" is a set of "new concept construction method", which is a construction method for setting up a special equipment transportation channel for the nuclear island plant horizontal structure during construction. To solve the problem of full support formwork equipment transportation of horizontal structure. It can also realize fast formwork construction of horizontal structure under any "wall first and board later" construction sequence. The whole free support fast formwork system adopts modular design and can be combined and assembled at will, which is suitable for different width and height of horizontal structure construction requirements.

[0070] 1. Formwork system: wooden I-beam + wood formwork + wood beam limiting part.

[0071] 2. Frame system: steel beam module + adapter module.

[0072] 3. Support system: embedded climbing cone + suspension boot (adjustable support) + floor adjustable support.

[0073] The "nuclear island plant horizontal structure free support fast formwork system" is a set of "new concept construction method", which is a construction method for setting up a special equipment transportation channel for the nuclear island plant horizontal structure during construction. To solve the problem of full support formwork equipment transportation of horizontal structure. It can also realize fast formwork construction of horizontal structure under any "wall first and board later" construction sequence. The whole free support fast formwork system adopts modular design and can be combined and assembled at will, which is suitable for different width and height of horizontal structure construction requirements.

[0074] The fast-supported formwork dismantling method uses a lifting trolley, which comprises a chassis 15, a vertical guide rail 16 and a driving mechanism fixedly installed on the chassis, a tray 17 installed on the vertical guide rail, the tray being capable of moving up and down along the vertical guide rail under the driving of the driving mechanism, the vertical guide rail being two oppositely arranged C-shaped steels, and the tray comprising a body support 18, two sides of the body support being fixedly installed with square tubes 20, the square tubes being installed with rollers 21, the rollers extending out from three sides of the square tubes which are not in direct contact with the body support to form a rolling fit with the C-shaped steels, and the body support being fixedly installed with a receiving part 19 for fixed connection with the frame platform.

[0075] As shown in Figures 17-29 The fast-supported formwork dismantling method comprises the following steps:

[0076] 1: Move the lifting trolley to lift the tray to hold the lower opening of the frame platform.

[0077] 2: Adjust the adjusting mechanism on the suspension shoe to loosen the support force of the suspension shoe on the frame platform.

[0078] 3: Remove the suspension shoe and the adjusting mechanism and fold the climbing cone.

[0079] 4: Lower the lifting trolley to a position where it is convenient for a worker to disassemble the wood formwork and the frame platform.

[0080] 5: Remove and disassemble the wood formwork and the wooden I-beam.

[0081] 6: Remove and disassemble the frame platform.

[0082] 7: Remove the wood formwork at the lower end of the adsorbed horizontal structure.

[0083] The lifting trolley can also use a scissor support platform or a telescopic rod structure to realize lifting.

[0084] Since the lowest height of the scissor support platform and the telescopic rod structure during lifting is relatively high, the lifting trolley is preferably used in the present scheme.

[0085] When the lifting trolley is used, since the vertical guide rail cannot be lifted, a detachable part is provided at the wood formwork corresponding to the vertical guide rail, and the detachable part is fixedly connected to the wood formwork by means of bolts or the like. The detachable part can also include a wooden I-beam and / or a steel beam located directly above the vertical guide rail.

[0086] In this state, step 4 can include 4.1: retracting the lifting trolley by a certain distance; 4.2: removing the detachable part directly above the vertical guide rail of the lifting trolley to form a channel for the tray to descend; and 4.3: continuing to lower the tray to lower the overall formwork to a position where it is convenient for a worker to disassemble the wood formwork and the frame platform.

[0087] The vertical guide rails are installed at intervals between the wooden I-beams and at intervals between the steel beams of the frame platform.

[0088] When the formwork is dismantled, the connection between the detachable part and the wooden formwork needs to be dismantled after the climbing cone is dismantled.

[0089] After step 4, the lifting trolley and the support system (wooden formwork, wooden I-beams, frame platform, outer formwork excluding the wooden formwork, and detachable part) carried on the lifting trolley can be moved to the next process (the construction environment is the same or basically the same) to carry out construction, which can provide construction efficiency and does not need to be repeatedly dismantled.

[0090] The vertical guide rails are installed at intervals between the wooden I-beams and at intervals between the steel beams of the frame platform.

[0091] The driving mechanism for driving the vertical guide rails to slide up and down relative to the outer frame can be a winch, a hydraulic cylinder, an air cylinder, etc.

[0092] It should be noted that the above embodiments can be freely combined as needed. The above description is only the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A method for rapid formwork removal of a horizontal structure in a nuclear island plant, characterized in that, Including the following steps: Step 1: Move the lifting mechanism and raise its tray to support the bottom of the frame platform; Step 2: Adjust the adjustment mechanism on the suspension shoe to loosen the support force of the suspension shoe on the frame platform; Step 3: Remove the suspension boots and adjustment mechanism, and dismantle the climbing cones; Step 4: Lower the lifting mechanism to a position where it is easy for workers to disassemble the wooden formwork and frame platform; Step 5: Remove and disassemble the wooden formwork on the lifting mechanism, and remove the wooden I-beams; Step 6: Dismantle and disassemble the frame platform; Step 7: Remove the wooden formwork from the lower end of the horizontal adsorption structure; The lifting mechanism is a lifting trolley, which includes a chassis. Vertical guide rails are fixedly mounted on the chassis, and a pallet is mounted on the vertical guide rails. Driven by a drive mechanism, the pallet can move up and down along the vertical guide rails. The vertical guide rails are two opposing C-shaped steel sections. The pallet includes a main support frame, with square tubes fixedly mounted on both sides. Rollers are mounted on the square tubes, extending from three sides of the square tubes that do not directly contact the main support frame, forming a rolling engagement with the C-shaped steel sections. A receiving part for fixed connection to the frame platform is fixedly mounted on the main support frame. The timber formwork includes inner formwork installed on the timber I-beams and outer formwork located outside the inner formwork for contact with the vertical structure. The section of the inner formwork directly above the vertical guide rails is removable. The fourth step includes: 4.1: retracting the lifting trolley a certain distance; 4.2: removing the removable part directly above the vertical guide rail of the lifting trolley to form a channel for the pallet to descend; 4.3: continuing to lower the pallet, lowering the entire template system to a position where it is easy for workers to disassemble the wooden template and frame platform.

2. The method for rapid formwork removal of the horizontal structure of the nuclear island plant as described in claim 1, characterized in that, The vertical guide rails can be slidably installed on the outer frame, which is made of C-shaped steel, and the base is fixed to the lower end of the outer frame.

3. The method for rapid formwork removal of the horizontal structure of the nuclear island plant as described in claim 1, characterized in that, The wooden beams and the parts located directly above the vertical guide rails on the frame platform are also removable.

4. The method for rapid formwork removal of the horizontal structure of the nuclear island plant as described in claim 1, characterized in that, The adjustment mechanism is a threaded rod. The suspension shoe includes at least a front end plate, an upper end plate, and a lower end plate. The front end plate is detachably fixedly connected to the anchor point embedded part. There is a gap between the upper end plate and the lower end plate. The threaded rod is threadedly connected to the upper end plate, and the upper end of the threaded rod is fixedly connected to the frame platform.

5. The method for rapid formwork removal of the horizontal structure of the nuclear island plant as described in claim 4, characterized in that, The lower or upper end face of the upper end plate is fixedly installed with a nut, and the threaded rod is threadedly connected to the nut. The lower end of the threaded rod has a protrusion, and the upper end of the threaded rod is fixedly installed with a support plate. The support plate is fixedly connected to the frame platform by bolts.

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