Prefabricating and mounting method for embedded part at bottom of high-level liquid waste storage chamber

Abstract

The invention relates to the technical field of high-level liquid waste storage equipment, in particular to a prefabrication and installation method of an embedded part at the bottom of a high-level liquid waste storage chamber, which comprises the following steps: step 1, prefabricating the embedded part, and arranging a support frame at the bottom of the embedded part; 2, the size and the position of a bottom plate in the storage chamber are remeasured and checked; (3) the embedded parts prefabricated in the step (1) are numbered; and 4, the embedded parts numbered in the step 3 are hoisted to a designated position to be subjected to assembly welding. By means of the prefabrication installation method, the construction quality and the construction progress of the embedded part can be effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of high-level radioactive waste liquid storage equipment, and in particular to a method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive waste liquid storage room. Background Art

[0002] The storage room in the high-level liquid waste storage equipment is an important structural part of the storage plant. Important storage tanks and other equipment need to be installed and placed inside it. Therefore, there are higher structural requirements for the storage room, and it is necessary to pre-embed the foundation annular embedded parts at the bottom of the storage room.

[0003] The foundation annular embedded parts are mostly made of stainless steel plates and steel bars, as well as stainless steel plates and reinforced plates. Due to the large weight and size of the annular embedded parts, the large welding area, the thin plate and the space operation constraints, the assembly accuracy cannot be guaranteed. At the same time, the annular embedded parts have more anchoring steel bars, the diameter of the anchoring steel bars is large, and the floor steel bars in the storage room are dense, so the anchoring steel bars of the annular embedded parts will conflict with the floor steel bars. The anchoring steel bars often need to be bent, which will affect the construction quality and progress. Summary of the invention

[0004] (I) The present invention provides a method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive waste storage room, which alleviates the technical problem in the prior art that the construction quality and progress of the embedded parts installation process cannot be guaranteed.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive liquid waste storage room, comprising the following steps:

[0007] Step 1, prefabricate the embedded parts, and provide a support frame at the bottom of the embedded parts;

[0008] Step 2, re-measure and check the size and position of the bottom plate in the storage room;

[0009] Step 3, numbering the embedded parts prefabricated in step 1;

[0010] Step 4, hoisting the embedded parts numbered in step 3 to a designated location for assembly welding.

[0011] Furthermore, in step 1, the embedded parts are first cut into twelve equal parts, then welded into six pieces in pairs, and holes are drilled in the embedded parts.

[0012] Furthermore, anchoring steel bars are passed through the drilled holes and fixed by welding.

[0013] Furthermore, the welding angle of the first welding pass is 45°, the welding angle of the second welding pass is 30°, and the welding angle of the third welding pass is 30°.

[0014] Furthermore, in step 2, after the re-inspection is qualified, the surface is cleaned, and the vertical and horizontal center lines and the elevation reference points of the embedded parts are marked on the bottom plate of the storage room according to the elevation reference points, vertical and horizontal center lines of the storage room and the size of the embedded parts.

[0015] Furthermore, in step 4, the prefabricated embedded parts are transported to the construction site in the order of numbers.

[0016] Furthermore, a tower crane is used at the construction site to lift the embedded parts piece by piece to the installation position.

[0017] Furthermore, the embedded parts are inspected before lifting, and it is confirmed whether the welding quality meets the construction requirements.

[0018] Furthermore, after welding is completed, the weld is ground to be flush with the parent material.

[0019] Furthermore, the embedded part is ring-shaped.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a method for prefabrication and installation of embedded parts at the bottom of a high-level liquid waste storage room. First, the embedded parts are prefabricated according to the design drawings, the material layout drawings and the steel bar drawings. The support frame is welded and fixed at the bottom of the embedded parts. The toughness of the steel bars and the load of personnel when pouring concrete can be offset by the support frame, which can facilitate subsequent assembly and welding and ensure the flatness of the embedded parts. The size and position of the bottom plate in the storage room are then re-measured and checked to ensure that the positioning of the embedded parts during installation can be more accurate and the construction quality is improved. The prefabricated embedded parts are numbered according to the material layout drawings, and transported to the construction site according to the numbers by using a carrier, and then hoisted to the designated location for assembly and welding. The above-mentioned prefabrication and installation method can effectively ensure the construction quality and construction progress of the embedded parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1A schematic diagram of the embedded component structure of a method for prefabrication and installation of embedded components at the bottom of a high-level radioactive liquid waste storage chamber provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of drilling holes for embedded parts of a method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive liquid waste storage room provided by an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of anchor steel bars and diamond welding for a method of prefabrication and installation of embedded parts at the bottom of a high-level radioactive liquid waste storage room provided in an embodiment of the present invention.

[0026] icon:

[0027] 100-embedded parts; 101-drilling holes; 102-anchoring steel bars; 103-welding rods. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the inside of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0031] like Figures 1 to 3As shown, the present invention provides a method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive liquid waste storage room, comprising the following steps: step 1, prefabrication of embedded parts 100, and provision of a support frame at the bottom of the embedded parts 100; step 2, re-measurement and inspection of the size and position of the bottom plate in the storage room; step 3, numbering the embedded parts 100 prefabricated in step 1; step 4, hoisting the numbered embedded parts 100 in step 3 to a designated position for assembly welding.

[0032] In this embodiment, firstly, the embedded parts 100 are prefabricated according to the design drawings, the material layout drawings and the steel bar drawings, and the support frame is welded and fixed at the bottom of the embedded parts 100. The support frame can offset the toughness of the steel bars and the load of the personnel when pouring concrete, which can facilitate the subsequent assembly welding and ensure the flatness of the embedded parts 100. Then, the size and position of the floor plate in the storage room are re-measured and checked to ensure that the positioning of the embedded parts 100 during installation can be more accurate and the construction quality is improved. The prefabricated embedded parts 100 are numbered according to the material layout drawings, and transported to the construction site according to the numbers by using a carrier, and then hoisted to the designated location for assembly welding. The above-mentioned prefabrication and installation method can effectively ensure the construction quality and construction progress of the embedded parts 100.

[0033] After the embedded parts 100 are installed, concrete is poured. After the curing period, the embedded parts 100 and the bottom plate of the storage room are fixed in place by steel nails, and then concrete is poured until it is flush with the upper surface of the embedded parts 100, completing the installation of the embedded parts 100 at the bottom of the high-level liquid waste storage room.

[0034] According to an embodiment provided by the present invention, Figure 1 As shown, in step 1, the embedded part 100 is first cut into twelve equal parts, then welded into six pieces in pairs, and a drill hole 101 is opened in the embedded part 100.

[0035] In this embodiment, the embedded parts 100 are laid out in combination with the design drawings, the blanking layout drawings and the steel bar drawings, and it is particularly important to pay attention to the nodes in the densely packed parts of the anchor steel bars 102, and to perform blanking, wherein, optionally, a shearing machine or an automatic cutting machine is used for blanking, and each embedded part 100 is blanked in twelve equal parts, so that the blanking can ensure that the edges and corners are straight, without burrs or blunt angles. Then, the twelve-divided blanked parts are welded into six pieces in pairs according to the design drawings, and then the embedded parts 100 are drilled 101 to open.

[0036] Among them, optionally, the material can be divided into four equal parts, six equal parts, eight equal parts or other even numbers, and its purpose does not deviate from the design concept of the present invention and should fall within the protection scope of the present invention.

[0037] According to an embodiment provided by the present invention, Figure 1As shown, anchoring steel bars 102 are passed through the drilled holes 101 and fixed by welding.

[0038] In this embodiment, the anchoring steel bar 102 is used to pass through the drill hole 101, and preferably, the drill hole 101 is set to be a bell mouth, the inner diameter of which should be larger than the diameter of the anchoring steel bar 102, and the inclination angle is 45°, so that the embedded part 100 and the anchoring steel bar 102 form a T-shaped joint.

[0039] Optionally, the T-joint of the embedded part 100 is welded by manual arc welding.

[0040] According to an embodiment provided by the present invention, Figure 1 As shown, the welding angle of the first welding pass is 45°, the welding angle of the second welding pass is 30°, and the welding angle of the third welding pass is 30°.

[0041] In this embodiment, attention should be paid to the welding angle during welding. Preferably, the welding angle of the first welding is 45°, the welding angle of the second welding is 30°, and the welding angle of the third welding is 30°, until the weld height meets the design requirements. At the same time, welding needs to be continuous, and the current during welding should not be too large to prevent burning of the steel bars.

[0042] After welding, the slag should be removed quickly. Since the weld needs to be uniform and full, there should be no defects such as slag inclusions, pores and honeycombs. Chisels and angle grinders should be used to clear welding spatter. If there are defects, repair welding should be carried out in time.

[0043] Among them, optionally, after welding is completed, it is necessary to conduct a spot check on some of the same embedded parts 100, and 5% can be selected for spot check, but it cannot be less than ten pieces, so as to test the mechanical properties of the anchor steel bars 102 and determine whether the structure meets the design requirements.

[0044] The bending angle at the joint of the anchor steel bar 102 and the drill hole 101, the offset of the steel bar axis, the weld width, the weld length and the undercut depth can be checked by means of a weld ruler. At the same time, the appearance of the weld needs to be inspected by visual inspection and a weld ruler to confirm that the weld surface should be flat, without depressions or weld bumps, and that there should be no visible cracks in the weld joint area, and the weld excess height should be 2-4mm.

[0045] According to an embodiment provided by the present invention, in step 2, after the re-inspection is qualified, the surface is cleaned, and the vertical and horizontal center lines and the elevation reference points of the storage room are marked on the bottom plate of the storage room according to the elevation reference points, vertical and horizontal center lines and the size of the embedded parts 100.

[0046] In this embodiment, the size and position of the bottom plate foundation in the storage room are re-measured and checked, wherein, optionally, the allowable deviation value of the coordinate position (vertical and horizontal axes) is ±20 mm, and the elevations of different planes of the bottom plate foundation, the outer dimensions of the plane on the foundation, the horizontality of the plane on the foundation, the vertical deviation, etc. need to be within the allowable deviation value range.

[0047] After acceptance, the surface will be cleaned and the horizontal and vertical center lines and elevation reference points of the embedded parts 100 will be placed on the foundation according to the elevation reference points, vertical and horizontal center lines of the storage room foundation and the dimensions in the installation drawings of the embedded parts 100, so as to ensure the accurate installation positioning of the embedded parts 100, and then ensure the construction quality and progress.

[0048] According to an embodiment provided by the present invention, in step 4, the prefabricated embedded parts 100 are transported to the construction site in the order of numbers.

[0049] In this embodiment, the embedded parts 100 numbered according to the cutting layout are transported to the construction site in the order of numbers using a carrier. Preferably, 5T trucks are used for shipment in batches to ensure that the subsequent embedded parts 100 can be welded and assembled smoothly at the construction site, while also ensuring the construction progress.

[0050] According to an embodiment provided by the present invention, a tower crane is used at the construction site to lift the embedded components 100 piece by piece to the installation location.

[0051] In this embodiment, the embedded parts 100 are first transported to the construction site in the order of the numbers to ensure that the subsequent embedded parts 100 can be smoothly welded and assembled at the construction site. After being transported to the construction site, the prefabricated embedded parts 100 are coordinated and lifted to the installation position piece by piece using a tower crane.

[0052] According to an embodiment provided by the present invention, the embedded component 100 is inspected before lifting, and it is confirmed whether the welding quality meets the construction requirements.

[0053] In this embodiment, inspection and preparation are required before hoisting to confirm whether the welding quality of the embedded parts 100 meets the construction requirements. At the same time, the construction personnel-level tools are inspected to determine whether they meet the hoisting requirements, thereby ensuring the smooth and safe transportation and hoisting of the embedded parts 100.

[0054] According to an embodiment provided by the present invention, the weld is ground to be flush with the parent material after welding is completed.

[0055] In this embodiment, the anchoring steel bar 102 is passed through the drill hole 101, and after three times of fillet welding using the welding rod 103, the weld needs to be polished until it is flush with the parent material.

[0056] Among them, optionally, a grinding wheel, a grinding disc or other grinding equipment can be used to grind the weld, and its purpose does not deviate from the design concept of the present invention and should fall within the protection scope of the present invention.

[0057] According to an embodiment provided by the present invention, Figure 1 As shown, the embedded component 100 is ring-shaped.

[0058] In this embodiment, the embedded component 100 is annular as a whole, so that it can be easily fixed on the bottom of the high-level radioactive liquid waste storage room, thereby ensuring the construction quality and construction progress of the overall installation, so that the construction can proceed smoothly.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive waste storage room, characterized in that: The steps include: Step 1, prefabricate the embedded part (100), and provide a support frame at the bottom of the embedded part (100); Step 2, re-measure and check the size and position of the bottom plate in the storage room; Step 3, numbering the embedded parts (100) prefabricated in step 1; Step 4, hoisting the embedded parts (100) numbered in step 3 to a designated location for assembly welding.

2. The method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive waste storage room according to claim 1, characterized in that: In the step 1, the embedded part (100) is first cut into twelve equal parts, then welded into six parts in pairs, and a drill hole (101) is opened in the embedded part (100).

3. The method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive waste storage room according to claim 2, characterized in that: Anchor steel bars (102) are passed through the drilled holes (101) and fixed by welding.

4. The method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive waste storage room according to claim 3, characterized in that: The welding angle for the first welding is 45°, the welding angle for the second welding is 30°, and the welding angle for the third welding is 30°.

5. The method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive liquid waste storage room according to claim 1, characterized in that: In step 2, after the re-test is qualified, the surface is cleaned, and the vertical and horizontal center lines and the elevation reference points of the embedded part (100) are marked on the bottom plate of the storage room according to the elevation reference points, the vertical and horizontal center lines of the storage room and the size of the embedded part (100).

6. The method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive waste storage room according to claim 1, characterized in that: In the step 4, the prefabricated embedded parts (100) are transported to the construction site in the order of numbers.

7. The method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive waste storage room according to claim 6, characterized in that: At the construction site, a tower crane is used to lift the embedded parts (100) piece by piece to the installation location.

8. The method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive waste storage room according to claim 7, characterized in that: Before lifting, the embedded parts (100) are inspected to confirm whether the welding quality meets the construction requirements.

9. The method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive liquid waste storage room according to claim 4, characterized in that: After welding is completed, grind the weld until it is flush with the parent material.

10. The method for prefabrication and installation of embedded parts at the bottom of a high-level radioactive liquid waste storage room according to any one of claims 1 to 9, characterized in that: The embedded part (100) is ring-shaped.

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