A composite reinforcement structure for cracks in induced draft fan foundation

Abstract

The utility model discloses a composite reinforcement structure for cracks in an induced draft fan foundation, and relates to the technical field of induced draft fan equipment, including: an original concrete structure foundation; a primary grouting layer, and the primary grouting layer is installed inside the original concrete structure foundation; the beneficial effects of the utility model are: a structural joint, a primary grouting layer, a secondary grouting layer and a superimposed layer are provided, the grooved part should be rinsed clean, and then processed with an angle grinder, through the provision of the above-mentioned composite reinforcement structure, the cracks after repair are consistent with the original concrete, which greatly enhances the integrity of the cracked fan foundation and greatly reduces the repair cost, and by using the composite reinforcement structure, the cracks of the anchor subjected to greater vibration during the operation of the equipment will not have secondary cracking, the equipment foundation is reinforced, the construction period is shortened, and the equipment installation and operation requirements are met, and the installation of the plum blossom short reinforcement is coordinated by providing a reinforcement installation cavity, which is more convenient for binding the stressed reinforcement bars and improves the overall stability during use.

Description

Technical Field

[0001] The utility model relates to the technical field of induced draft fan equipment, in particular to a composite reinforcement structure for cracks in an induced draft fan foundation. Background Art

[0002] The induced draft fan is used to extract the flue gas from the boiler and maintain the negative pressure of the boiler. The flue gas passes through the air preheater and the electrostatic precipitator and then enters the induced draft fan, which sends it to the desulfurization system or directly discharges it into the chimney. The induced draft fan foundation will generate large vibrations when the equipment is running, so a specially designed reinforced concrete foundation is required to effectively transmit and disperse these vibrations to prevent damage to the machine and ensure its normal operation.

[0003] Reinforced concrete structures are formed by mixing, vibrating and curing a variety of different materials. From a microscopic point of view, concrete works with cracks, and the important thing is how to avoid visible cracks, especially cracks that affect the safety of the structure.

[0004] Tests show that the appearance and expansion of cracks are precursors to structural damage. The presence of cracks indicates that the structural bearing capacity may be insufficient. Excessively large cracks will cause steel bars to rust and reduce the durability of the structure. Therefore, cracks are not allowed to appear in structures in customary practice. However, objectively, cracks are difficult to completely avoid. From an economic and scientific point of view, a certain degree of cracks can be accepted. The causes of cracks are relatively complex, and the degree of harm is not only related to the size of the cracks, but also varies according to the nature of the cracks, the causes of the cracks, and the requirements of the structural functions. Different types of cracks have different treatment methods.

[0005] Traditional methods for repairing cracks in concrete structures mainly include surface sealing, injection, pressure grouting and filling sealing, which are suitable for different situations. They should be selected according to the cause, properties, width, depth, stability of cracks, corrosion of steel bars and the purpose of repair. For the foundation of induced draft fan power machine, the crack repair must adopt a more stringent treatment technology than the traditional crack repair method. Therefore, it is necessary to design a composite reinforcement structure for induced draft fan foundation cracks to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a composite reinforcement structure for cracks in the foundation of an induced draft fan to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above purpose, the utility model provides the following technical solution: a composite reinforcement structure for cracks in the foundation of an induced draft fan, comprising:

[0008] Original concrete structural foundation;

[0009] A primary grouting layer, the primary grouting layer is installed inside the original concrete structure foundation;

[0010] A secondary grouting layer, the secondary grouting layer is installed on the surface of the original concrete structure foundation, and the secondary grouting layer is located above the primary grouting layer;

[0011] Plum blossom short reinforcement, the plum blossom short reinforcement is installed inside the secondary grouting layer;

[0012] A flat bottom trough installed below the secondary grouting layer;

[0013] A mounting groove, the mounting groove being mounted below the flat bottom groove;

[0014] A structural joint is installed inside the installation groove and extends to the inside of the original concrete structure foundation.

[0015] The technical effect of adopting the above further scheme is: when in use, a flat bottom groove with a width of 150mm and a depth of 50mm is cut along both sides of the structural joint with a cutting machine. When cutting the groove of the concrete structure, a non-destructive cutting method is adopted, and the original structure shall not be damaged. The grooved part shall be rinsed clean and then processed with an angle grinder. The structural joint is reinforced by the pressure grouting method. A low-viscosity, high-strength crack repair glue or modified epoxy resin glue is injected into the crack cavity with a certain pressure. Before injection, the blockage in the structural joint is cleared, and the joint should be blown dry or baked dry to facilitate adhesion. The cracks should be sealed according to the product manual. For the cracks on the top of the induced draft fan foundation, which are relatively deep, artificial U-shaped grooves are opened at the structural joints for glue injection, and the method of planting crack reinforcement steel bars is adopted to effectively anchor the concrete on both sides of the structural joints to improve the overall crack resistance of large-volume concrete. The intersection of the cracks on the top of the foundation and the reserved holes runs through the entire hole depth. On the basis of effective reinforcement of the cracks, a secondary grouting layer of a certain thickness is added to the top of the foundation to form an effective constraint on the lower concrete to prevent the cracks from being formed during the design. During the operation of the equipment, the ground anchor is subjected to large vibration, which has an adverse effect on the integrity and durability of the foundation; after the top surface of the original concrete structure foundation is roughened and the induced draft fan is installed and leveled, plum blossom short bars are implanted on the original concrete structure foundation, and the load-bearing steel bars are tied. Before pouring the secondary grouting, the dust particles on the original concrete structure foundation should be blown clean, a special interface agent should be applied, and the secondary grouting layer and the superposition layer should be poured with micro-expanded fine stone concrete and strengthened maintenance. Through the setting of the above-mentioned composite reinforcement structure, the cracks after repair are consistent with the original concrete, which greatly enhances the integrity of the cracked fan foundation and greatly reduces the repair cost. With the use of the composite reinforcement structure, the cracks of the ground anchor subjected to large vibration during the operation of the equipment will not crack again. The equipment foundation has been reinforced, the construction period has been shortened, and the equipment installation and operation requirements have been met. By opening a steel bar installation cavity to cooperate with the installation of plum blossom short bars, it is more convenient to tie the load-bearing steel bars, which improves the overall stability during use. The overall structure is simple and easy to operate, and no power equipment is used for auxiliary operation, which saves the overall use and installation cost and facilitates normal installation and maintenance.

[0016] As a preferred solution of the utility model: a steel bar installation cavity for matching plum blossom short bars is opened inside the original concrete structure foundation and on both sides of the flat bottom groove, and an interface agent is coated inside the original concrete structure foundation and below the secondary grouting layer.

[0017] The technical effect of adopting the above further scheme is: by opening a steel bar installation cavity to cooperate with the installation of plum blossom short bars, it is more convenient to tie the stressed steel bars and improve the overall stability during use.

[0018] As a preferred solution of the utility model: the interior of the installation groove is filled with crack repair glue, and the interior of the secondary grouting layer is installed with equidistantly distributed stress-bearing steel bars.

[0019] The technical effect of adopting the above further scheme is: implanting plum blossom short bars on the basis of the original concrete structure, tying the stress-bearing steel bars, and improving the overall stability during use.

[0020] As a preferred solution of the utility model: crack reinforcement steel bars extending to both sides are installed inside the flat bottom trough, the crack reinforcement steel bars are of a symmetrical structure, the horizontal angle between the crack reinforcement steel bars and the flat bottom trough is 45 degrees, and the flat bottom trough is a U-shaped structural trough.

[0021] The technical effect of adopting the above further scheme is: artificially open a U-shaped groove at the structural joint to inject glue, and adopt the method of planting crack reinforcement steel bars to effectively anchor the concrete on both sides of the structural joint, thereby improving the overall crack resistance of large-volume concrete.

[0022] As a preferred solution of the utility model: a superimposed layer is installed on the upper part of the primary grouting layer and on one side of the secondary grouting layer.

[0023] The technical effect of adopting the above further scheme is: superimposed reinforcement treatment through superimposed layers and secondary grouting layers.

[0024] As a preferred solution of the utility model: the thickness of the secondary grouting layer is 100 mm, the width of the flat-bottomed groove is 150 mm, and the depth of the flat-bottomed groove is 50 mm.

[0025] The technical effect of adopting the above further solution is: when in use, a flat bottom groove with a width of 150 mm and a depth of 50 mm is cut along both sides of the structural joint with a cutting machine, and the value is adjusted according to the needs during use.

[0026] Compared with the prior art, the utility model has the following beneficial effects: a structural joint, a primary grouting layer, a secondary grouting layer and a superimposed layer are provided. When in use, the grooved part should be rinsed clean and then processed with an angle grinder. The structural joint is reinforced by a pressure grouting method. A low-viscosity, high-strength crack repair glue or a modified epoxy resin glue is injected into the crack cavity with a certain pressure. Before injection, the blockage in the structural joint is removed. The inside of the joint should be blown dry or baked dry to ensure firm bonding. The crack periphery should be sealed according to the provisions of the product manual. For the crack at the top of the induced draft fan foundation, which extends relatively deep, a U-shaped groove is artificially opened at the structural joint to inject glue, and the method of planting crack reinforcement steel bars is adopted to effectively anchor and connect the concrete on both sides of the structural joint, thereby improving the overall crack resistance of large-volume concrete. The intersection of the crack at the top of the foundation and the reserved hole runs through the entire hole depth. On the basis of effective reinforcement of the crack, a secondary grouting layer of a certain thickness is added to the top of the foundation to form an effective constraint on the lower concrete, thereby preventing the anchor from being subjected to large vibration during the operation of the equipment. It has an adverse effect on the integrity and durability of the foundation; after the top surface of the original concrete structure foundation is roughened and the induced draft fan is installed and leveled, plum blossom short bars are implanted on the original concrete structure foundation, and the load-bearing steel bars are tied. Before pouring the secondary grouting, the dust particles on the original concrete structure foundation should be blown clean, a special interface agent should be applied, and the secondary grouting layer and the superposition layer should be poured with micro-expanded fine stone concrete and strengthened maintenance. Through the setting of the above-mentioned composite reinforcement structure, the repaired cracks are consistent with the original concrete, which greatly enhances the integrity of the cracked fan foundation and greatly reduces the repair cost. By using the composite reinforcement structure, the cracks in the ground anchor after being subjected to large vibration during the operation of the equipment will not crack again. The equipment foundation has been reinforced, the construction period has been shortened, and the equipment installation and operation requirements have been met. By opening a steel bar installation cavity to cooperate with the installation of plum blossom short bars, it is more convenient to tie the load-bearing steel bars, which improves the overall stability during use. The overall structure is simple and easy to operate, and no power equipment is used to assist in operation, which saves the overall use and installation cost and facilitates normal installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is the internal diagram of the overall structure of the utility model;

[0028] Figure 2 It is a side view of the original concrete structure foundation structure of the utility model.

[0029] In the figure: 1. Original concrete structure foundation; 2. Structural joint; 3. Flat bottom groove; 4. Crack repair glue; 5. Crack reinforcement steel bars; 6. Secondary grouting layer; 7. Stress-bearing steel bars; 8. Plum blossom short bars; 9. Interface agent; 10. Installation groove; 11. Primary grouting layer; 12. Steel bar installation cavity. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1 and Figure 2 The utility model provides a technical solution: a composite reinforcement structure for cracks in the foundation of an induced draft fan, comprising:

[0032] Original concrete structure foundation 1;

[0033] A primary grouting layer 11, the primary grouting layer 11 is installed inside the original concrete structure foundation 1;

[0034] A secondary grouting layer 6, wherein the secondary grouting layer 6 is installed on the surface of the original concrete structure foundation 1, and the secondary grouting layer 6 is located above the primary grouting layer 11;

[0035] A short plum blossom rib 8, wherein the short plum blossom rib 8 is installed inside the secondary grouting layer 6;

[0036] A flat bottom trough 3, which is installed below the secondary grouting layer 6;

[0037] The mounting groove 10 is installed below the flat bottom groove;

[0038] The structural joint 2 is installed inside the installation groove 10 and extends to the inside of the original concrete structure foundation 1.

[0039] It can be understood that the utility model is provided with a structural joint 2, a primary grouting layer 11, a secondary grouting layer 6 and a superimposed layer. When in use, a flat-bottomed groove 3 with a width of 150 mm and a depth of 50 mm is cut along both sides of the structural joint 2 with a cutting machine. When cutting the groove of the concrete structure, a non-destructive cutting method is adopted, and the original structure must not be damaged. The grooved part should be rinsed clean and then processed with an angle grinder. The structural joint 2 is reinforced by a pressure grouting method. A low-viscosity, high-strength crack repair glue or modified epoxy resin glue is injected into the crack cavity with a certain pressure. Before injection, the blockage in the structural joint 2 is cleared, and the seam should be blown dry or baked dry to ensure firm bonding. The crack periphery should be sealed according to the provisions of the product manual.

[0040] As for the cracks at the top of the induced draft fan foundation, which extend relatively deeply, an artificial U-shaped groove is opened at the structural joint 2 and glue is injected, and the concrete on both sides of the structural joint 2 is effectively anchored and connected by planting crack reinforcement steel bars 5 to improve the overall crack resistance of large-volume concrete; the intersection of the cracks at the top of the foundation and the reserved holes runs through the entire hole depth. On the basis of effectively reinforcing the cracks, a secondary grouting layer 6 of a certain thickness is added to the top of the foundation to form an effective constraint on the lower concrete, preventing the anchor from being subjected to large vibrations during the operation of the equipment, which may have an adverse effect on the integrity and durability of the foundation.

[0041] The top surface of the original concrete structure foundation 1 is roughened, and after the installation and leveling of the induced draft fan is completed, short plum blossom bars 8 are implanted on the original concrete structure foundation 1, and the load-bearing steel bars 7 are tied. Before pouring the secondary grouting, the dust particles on the original concrete structure foundation 1 should be blown clean, and a special interface agent 9 is applied. The secondary grouting layer 6 and the overlapping layer are poured with micro-expanding fine stone concrete and the maintenance is strengthened. Through the setting of the above-mentioned composite reinforcement structure, the cracks after repair are consistent with the original concrete, which greatly enhances the integrity of the cracked fan foundation and greatly reduces the repair cost.

[0042] By using a composite reinforcement structure, cracks in the ground anchor that are subjected to large vibrations during the operation of the equipment will not re-crack. The equipment foundation has been reinforced, which shortens the construction period and meets the equipment installation and operation requirements. The steel bar installation cavity 12 is provided to facilitate the installation of the plum blossom short reinforcement 8, which makes it more convenient to tie the stressed reinforcement 7 and improves the overall stability during use. The overall structure is simple and easy to operate, and no electrical equipment is used to assist in the operation, which saves the overall installation cost and facilitates normal installation and maintenance.

[0043] See also Figure 1 and Figure 2 A steel bar installation cavity 12 for matching with the plum blossom short bars 8 is provided inside the original concrete structure foundation 1 and on both sides of the flat bottom groove 3, and an interface agent 9 is coated inside the original concrete structure foundation 1 and below the secondary grouting layer 6.

[0044] It can be understood that the utility model provides a steel bar installation cavity 12 to facilitate the installation of the plum blossom short bars 8, which makes it more convenient to tie the stressed steel bars 7 and improves the overall stability during use.

[0045] See also Figure 1 and Figure 2 The interior of the installation groove 10 is filled with crack repair glue 4, and the interior of the secondary grouting layer 6 is installed with equidistantly distributed stress-bearing steel bars 7.

[0046] It can be understood that the utility model implants plum blossom short bars 8 on the original concrete structure foundation 1 and binds the stress-bearing steel bars 7, thereby improving the overall stability during use.

[0047] See also Figure 1 and Figure 2 The flat bottom trough 3 is installed with crack reinforcement steel bars 5 extending to both sides. The crack reinforcement steel bars 5 are of symmetrical structure. The horizontal angle between the crack reinforcement steel bars 5 and the flat bottom trough 3 is 45 degrees. The flat bottom trough 3 is a U-shaped structural trough.

[0048] It can be understood that the utility model artificially opens a U-shaped groove at the structural joint 2 and injects glue, and adopts the method of planting crack reinforcement steel bars 5 to effectively anchor the concrete on both sides of the structural joint 2, thereby improving the overall crack resistance of large-volume concrete.

[0049] See also Figure 1 and Figure 2 A superimposed layer is installed on the upper part of the primary grouting layer 11 and on one side of the secondary grouting layer 6 .

[0050] It can be understood that the utility model uses a laminated layer and a secondary grouting layer 6 for laminated reinforcement.

[0051] See also Figure 1 and Figure 2 The thickness of the secondary grouting layer 6 is 100 mm, the width of the flat-bottomed groove 3 is 150 mm, and the depth of the flat-bottomed groove 3 is 50 mm.

[0052] It is understandable that when the utility model is used, a flat bottom groove 3 with a width of 150 mm and a depth of 50 mm is cut along both sides of the structural seam 2 by a cutting machine, and the value is adjusted according to the needs during use.

[0053] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0055] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite reinforcement structure for cracks in induced draft fan foundation, characterized in that: include: Original concrete structure foundation (1); A primary grouting layer (11), the primary grouting layer (11) being installed inside the original concrete structure foundation (1); A secondary grouting layer (6), the secondary grouting layer (6) being installed on the surface of the original concrete structure foundation (1), and the secondary grouting layer (6) being located above the primary grouting layer (11); A short plum-shaped rib (8), the short plum-shaped rib (8) being installed inside the secondary grouting layer (6); A flat-bottomed trough (3), the flat-bottomed trough (3) being installed below the secondary grouting layer (6); A mounting groove (10), the mounting groove (10) being mounted below the flat bottom groove (3); A structural joint (2), wherein the structural joint (2) is installed inside the installation groove (10) and extends into the interior of the original concrete structural foundation (1).

2. The composite reinforcement structure for induced draft fan foundation cracks according to claim 1, characterized in that: Steel bar installation cavities (12) for use with the plum blossom short bars (8) are provided inside the original concrete structural foundation (1) and on both sides of the flat bottom groove (3).

3. The composite reinforcement structure for induced draft fan foundation cracks according to claim 1, characterized in that: An interface agent (9) is coated inside the original concrete structure foundation (1) and below the secondary grouting layer (6).

4. The composite reinforcement structure for induced draft fan foundation cracks according to claim 1, characterized in that: The interior of the installation groove (10) is filled with crack repair glue (4), and the interior of the secondary grouting layer (6) is installed with equidistantly distributed stress-bearing steel bars (7).

5. The composite reinforcement structure for induced draft fan foundation cracks according to claim 1, characterized in that: Crack reinforcement steel bars (5) extending to both sides are installed inside the flat bottom trough (3); the crack reinforcement steel bars (5) are of a symmetrical structure.

6. The composite reinforcement structure for induced draft fan foundation cracks according to claim 5, characterized in that: The horizontal angle between the crack reinforcing steel bar (5) and the flat bottom groove (3) is 45 degrees, and the flat bottom groove (3) is a U-shaped structural groove.

7. The composite reinforcement structure for induced draft fan foundation cracks according to claim 1, characterized in that: A superimposed layer is installed on the upper part of the primary grouting layer (11) and on one side of the secondary grouting layer (6).

8. The composite reinforcement structure for induced draft fan foundation cracks according to claim 1, characterized in that: The thickness of the secondary grouting layer (6) is 100 mm, the width of the flat-bottomed groove (3) is 150 mm, and the depth of the flat-bottomed groove (3) is 50 mm.

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