Method for making a temperature stress relief groove in a concrete structure

Abstract

The application provides a manufacturing method of a concrete structure temperature stress release groove, and specifically comprises the following steps: S1, setting multiple groups of frame columns on a construction site; S2, pouring concrete blocks between the multiple groups of frame columns; S3, installing edge sealing beams in a 'concave' shape between the multiple groups of frame columns, so that a backfill space for lightweight concrete is reserved in the middle of the edge sealing beams; S4, installing foamed polystyrene boards on the inner sides of the 'concave' shaped edge sealing beams on the left and right sides close to the lightweight concrete backfill space reserved in the middle; S5, backfilling lightweight concrete so that the lightweight concrete fills the lightweight concrete backfill space reserved in the middle of the edge sealing beams; and S6, after the lightweight concrete solidifies, using an acetone solution to dissolve the foamed polystyrene boards, so that gap joints are formed between the lightweight concrete and the left and right ends of the edge sealing beams. The application has the advantages of simple process, small construction difficulty, short construction period, convenient operation, no need for additional steel bars, and low construction cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a manufacturing method of a temperature stress release groove of a concrete structure. BACKGROUND

[0002] According to the Code for Design of Concrete Structures GB50010-2010 (2015 Edition), the maximum spacing of expansion joints of cast-in-place concrete frame structures and shear wall structures is 55m and 45m respectively. With the development of urban construction, a large number of super-long structures have emerged. Due to the requirements of architectural aesthetics and use function, the owners and architects often require that the structure cannot be provided with permanent expansion joints, and the length of the structure far exceeds the provisions of the Code for Design of Concrete Structures. The biggest problem of super-long concrete structures is the cracks caused by concrete shrinkage and temperature stress.

[0003] At present, the general way to solve the super-long structure without joints is to set post-pouring belts to release the early shrinkage deformation of concrete, set expansion reinforcement belts to offset the temperature shrinkage deformation, or use prestressed technology to balance the tensile stress caused by temperature deformation. Among them, the post-pouring belt can only release the shrinkage deformation of concrete and cannot solve the temperature deformation; the expansion reinforcement belt is not suitable for super-long structures with excessive shrinkage deformation due to its limited resistance to shrinkage deformation; and the use of prestressed technology greatly increases the design and construction difficulty and also increases the cost and construction cost of the building structure.

[0004] In order to solve the above-mentioned problems, a temperature stress release structure for super-long building structures has emerged. For example, a temperature stress release structure for super-long building structures is disclosed in Chinese Patent No. CN210713443U, which includes a first floor slab and a second floor slab with a super-long reinforced concrete structure. A "concave" shaped groove is provided between the first floor slab and the second floor slab. The upper end surface of the groove is flush with the upper surface of the floor slab, and the lower end surface of the groove is lower than the lower surface of the floor slab. The groove is filled with sand and gravel. In the utility model, by setting a "concave" shaped groove between the floor slabs, the temperature stress in the floor slab can be effectively released by the inward or outward expansion of the two side walls of the groove, and the force transmission between the beams and columns is improved, and the horizontal force borne by the vertical members due to the expansion or shrinkage of the floor slab is greatly reduced. However, this structure requires a large amount of steel structure, which is difficult to construct and has high cost.

[0005] For example, Chinese patent CN208533577U discloses a temperature stress relief trench for an ultra-long concrete structure, comprising a first ultra-long concrete structure and a second ultra-long concrete structure. A first cantilever beam is provided on the first ultra-long concrete structure, and a second cantilever beam is provided on the second ultra-long concrete structure. A first sealing beam is provided at the end of the first cantilever beam, and a second sealing beam is provided at the end of the second cantilever beam. A low-elevation plate is provided between the first and second sealing beams to connect them. The first sealing beam, the low-elevation plate, and the second sealing beam together form a temperature stress relief trench, and a post-pouring strip is provided within the temperature stress relief trench. This utility model guides the concentrated release of temperature stress by setting a temperature stress relief trench in the ultra-long concrete structure, reducing cracks caused by temperature stress. The concentrated setting of the temperature stress relief trench can reduce the amount of structural steel reinforcement, resulting in good social and economic benefits. However, the use of a post-pouring strip means that the entire process cannot be completed in one pour, resulting in a long construction period. Furthermore, while the post-pouring strip structure is better at handling concrete shrinkage deformation, its effectiveness in handling concrete temperature deformation is generally limited. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention proposes a method for manufacturing temperature stress relief trenches in concrete structures. The process is simple, easy to construct, has a short cycle, is convenient to operate, requires no additional steel reinforcement, and has low construction costs.

[0007] To achieve the above technical solution, the present invention provides a method for manufacturing a temperature stress relief trench in a concrete structure, specifically including the following steps:

[0008] S1. Multiple sets of frame columns are symmetrically arranged side by side on the site where construction is required;

[0009] S2. Pour concrete blocks between multiple sets of frame columns and reserve the installation position for the edge sealing beam;

[0010] S3. Install edge sealing beams distributed in a "U" shape between multiple sets of frame columns, so that the backfill space of lightweight concrete is reserved in the middle of the edge sealing beams.

[0011] S4. Install expanded polystyrene boards on the inner side of the lightweight concrete backfill space reserved in the middle on both sides of the U-shaped sealing beam.

[0012] S5. Backfill with lightweight concrete, so that the lightweight concrete fills the space reserved in the middle of the edge beam.

[0013] S6. After the lightweight concrete has solidified, use acetone solution to dissolve the expanded polystyrene board, so that gaps are formed between the lightweight concrete and both ends of the edge beam, and the dissolved polystyrene board acetone solution is drained from the gaps.

[0014] Preferably, it further comprises: S7, using the cover plate to cover the top of the gap joint to prevent impurities from falling into the gap joint.

[0015] Preferably, the thickness of the foamed polystyrene plate is 20-60mm.

[0016] Preferably, the thickness of the foamed polystyrene plate is 30-50mm.

[0017] Preferably, the width of the lightweight concrete backfill space is less than 3000mm.

[0018] Preferably, in the step S6, after the foamed polystyrene plate is dissolved by the acetone solution, a high-pressure water gun is used to flush the polystyrene plate acetone solution out of the gap joint.

[0019] The method has the advantages that:

[0020] The method for manufacturing the concrete structure temperature stress release groove is designed according to the structure of the stress release groove, the concave-shaped structure is designed, and the gap joint is formed between the left and right ends of the backfilled lightweight concrete and the edge beam, the temperature stress release in the concrete block can be effectively guided by the inward shrinkage or outward expansion of the two sides of the gap joint, and the formation of cracks in the concrete block is avoided.

[0021] The method for manufacturing the concrete structure temperature stress release groove is simple in construction, and the dissolution performance between the foamed polystyrene plate and the acetone solution is ingeniously utilized, the foamed polystyrene plate is dissolved by the acetone solution after the lightweight concrete is solidified, the gap joint is formed between the left and right ends of the lightweight concrete and the edge beam, the width and height of the gap joint can be controlled, and the construction is easy.

[0022] The method for manufacturing the concrete structure temperature stress release groove does not need to use additional steel bars, and the construction cost is low. DETAILED DESCRIPTION

[0023] Fig. 1 It is a side structure sectional view of the concrete structure temperature stress release groove in the application.

[0024] Fig. 2 It is a top view of the concrete structure temperature stress release groove structure in the application.

[0025] Fig. 3 It is a side structure sectional view of the concrete structure temperature stress release groove structure in the application after heating.

[0026] Fig. 4 It is a side structure sectional view of the concrete structure temperature stress release groove structure in the application after cooling.

[0027] In the figure: 1, frame column; 2, edge beam; 3, lightweight concrete; 4, gap joint; 5, cover plate; 6, concrete block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] Embodiment: A manufacturing method of a concrete structure temperature stress release groove.

[0030] Referring to Figs. 1 to 4 The manufacturing method of the concrete structure temperature stress release groove specifically comprises the following steps:

[0031] S1, multiple groups of frame columns 1 are symmetrically arranged side by side on a construction site, the frame columns 1 provide longitudinal support force for the concrete blocks 6 and the edge beams 2, the concrete blocks 6 are cast between the frame columns 1, and the edge beams 2 are also installed between the frame columns 1;

[0032] S2, the concrete blocks 6 are cast between the multiple groups of frame columns 1, and the installation positions of the edge beams 2 are reserved, wherein the concrete blocks 6 are used as load-bearing members to bear stress, the concrete blocks 6 are easily affected by temperature, expand when heated, and shrink when cooled, so that stress is easily generated inside the concrete blocks 6, causing cracks, the purpose of the present application is to cope with the internal stress generated by the concrete blocks 6 when heated or cooled, guide the release of the stress, and avoid the generation of cracks inside the concrete blocks 6;

[0033] S3, the edge beams 2 in a "concave" shape are installed between the multiple groups of frame columns 1, so that the backfill space of the lightweight concrete 3 is reserved in the middle of the edge beams 2;

[0034] S4, install the foamed polystyrene board on the inner side of the light-weight concrete backfill space reserved in the middle of the "concave" shaped edge beam 2 on both sides of the edge beam 2, the main function of the foamed polystyrene board is: (1) used for limiting the subsequent light-weight concrete backfill; (2) used for controlling the width and height of the subsequent gap joint 4, the thickness of the foamed polystyrene board is the width of the gap joint 4, and the height of the foamed polystyrene board is the height of the gap joint 4, in the embodiment, the thickness of the foamed polystyrene board is 40 mm, that is, the width of the gap joint 4 is 40 mm, the width of the gap joint 4 should not be too small, otherwise the deformation capacity when the concrete block 6 expands is limited, and the width of the gap joint 4 should not be too large, otherwise it will not only affect the appearance, but also reduce the overall bearing capacity of the concrete block 6, and research shows that when the width of the gap joint 4 is 40 mm, the comprehensive effect is best;

[0035] S5, backfill the light-weight concrete 3, so that the light-weight concrete 3 fills the light-weight concrete 3 backfill space reserved in the middle of the edge beam 2, that is, the space between the left and right foamed polystyrene boards, the width of the light-weight concrete backfill space is less than 3000 mm;

[0036] S6, after the light-weight concrete 3 solidifies, the foamed polystyrene board is dissolved using acetone solution, so that the light-weight concrete and the left and right ends of the edge beam form gap joints 4, and the dissolved polystyrene board acetone solution is discharged from the gap joint, and the dissolution performance between the foamed polystyrene board and the acetone solution is used, so that the width and height of the gap joint 4 are controllable, and when the acetone solution dissolves the foamed polystyrene board during actual construction, only the polystyrene board acetone solution needs to be flushed out of the gap joint 4 using a high-pressure water gun, and the construction is easy.

[0037] S7, use the cover plate 5 to cover the top of the gap joint 4 to prevent impurities from falling into the gap joint 4.

[0038] The manufacturing method of the concrete structure temperature stress release groove designs the structure of the stress release groove, forms the gap joint 4 between the backfilled light-weight concrete 3 and the left and right ends of the edge beam 2 through the "concave" shaped structure design, and uses the inward or outward expansion of the gap joint 4 to effectively guide the release of the temperature stress in the concrete block 6, and avoid the formation of cracks in the concrete block 6.

[0039] Moreover, the manufacturing method of the concrete structure temperature stress release groove is simple to construct, does not need to use additional steel bars, has low construction cost, and ingeniously uses the dissolution performance between the foamed polystyrene board and the acetone solution, after the light-weight concrete 3 solidifies, the foamed polystyrene board is dissolved using acetone solution, so that the light-weight concrete 3 and the left and right ends of the edge beam 2 form gap joints 4, so that the width and height of the gap joint 4 are controllable, and the construction is easy, which reduces the construction period and cost.

[0040] The above presents a preferred embodiment of the present application, but the present application should not be limited to the embodiment and the disclosure of the drawings, so that equivalent or modified, without departing from the disclosed spirit of the present application, fall within the scope of the present application.

Claims

1. A method of forming a temperature stress relief groove in a concrete structure, characterized by Specifically comprising the following steps: S1, symmetrically arranging multiple groups of frame columns side by side on a construction site; S2, pouring concrete blocks between the multiple groups of frame columns and reserving installation positions of edge beams; S3, installing edge beams in a "concave” shape between the multiple groups of frame columns, so that a lightweight concrete backfill space is reserved in the middle of the edge beams; S4, installing foamed polystyrene boards on the inner sides of the left and right sides of the "concave” shaped edge beams near the lightweight concrete backfill space reserved in the middle, the thickness of the foamed polystyrene boards being 20-60mm; S5, backfilling lightweight concrete so that the lightweight concrete fills the lightweight concrete backfill space reserved in the middle of the edge beams; S6, after the lightweight concrete solidifies, using an acetone solution to dissolve the foamed polystyrene boards, so that a gap joint is formed between the lightweight concrete and the left and right ends of the edge beams, and the dissolved polystyrene board acetone solution is discharged from the gap joint.

2. The method of claim 1, wherein Further comprising: S7, using a cover plate to cover the top of the gap joint to prevent impurities from falling into the gap joint.

3. The method of claim 1, wherein: The thickness of the foamed polystyrene board is 30-50mm.

4. The method of claim 1, wherein: The width of the lightweight concrete backfill space is less than 3000mm.

5. The method of claim 1, wherein: In the step S6, after the acetone solution dissolves the foamed polystyrene board, a high-pressure water gun is used to flush the polystyrene board acetone solution out of the gap joint.

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