阅读说明：本技术 超高砖烟囱加固方法 (Method for reinforcing ultrahigh-brick chimney ) 是由 孙晓阳 颜卫东 于健伟 边辉 王延生 陈新喜 李赟 唐鑫坤 余少乐 颜帅 杨腾 于 2019-10-21 设计创作，主要内容包括：本发明涉及一种超高砖烟囱加固方法,包括以下步骤：对烟囱顶部进行清理；制作悬挂台,将悬挂台固设于烟囱顶部,悬挂台的端部伸出烟囱外壁；提供吊笼,利用悬挂绳将吊笼挂设于悬挂台伸出烟囱外壁的部分,且通过收放悬挂绳调节吊笼的高度；利用吊笼作为施工作业平台并对烟囱外壁裂缝进行填补；以及提供多个竖向箍带和环向箍带,将竖向箍带竖向贴设并固定于烟囱的外壁,然后将环向箍带水平箍于竖向箍带。本发明采用在烟囱顶部制作悬挂台并下挂高度可调的吊笼的方法解决超高烟囱上人的问题,无需搭设脚手架,易于操作且安全性高,另一方面通过填补外壁裂缝以及利用竖向和环向的箍带箍紧进行烟囱的加固,实现既有烟囱修复再利用。(The invention relates to a method for reinforcing an ultrahigh brick chimney, which comprises the following steps: cleaning the top of the chimney; manufacturing a hanging table, fixedly arranging the hanging table on the top of the chimney, and extending the end part of the hanging table out of the outer wall of the chimney; providing a suspension cage, suspending the suspension cage on the part of the suspension platform extending out of the outer wall of the chimney by using a suspension rope, and adjusting the height of the suspension cage by retracting the suspension rope; the suspension cage is used as a construction operation platform and is used for filling cracks on the outer wall of the chimney; and providing a plurality of vertical straps and annular straps, vertically attaching the vertical straps to the outer wall of the chimney, and horizontally hooping the annular straps to the vertical straps. The method for manufacturing the hanging platform on the top of the chimney and hanging the height-adjustable suspension cage downwards solves the problem of people getting on the ultrahigh chimney, does not need to set up a scaffold, is easy to operate and high in safety, and realizes the restoration and reutilization of the existing chimney by filling cracks on the outer wall and tightening the chimney by utilizing the vertical strap and the annular strap.)

1. A method for reinforcing an ultra-high brick chimney is characterized by comprising the following steps:

cleaning the top of the chimney to expose the structural layer at the top of the chimney;

manufacturing a hanging table, fixedly arranging the hanging table on the top of the chimney, and enabling the end part of the hanging table to extend out of the outer wall of the chimney;

providing a suspension cage, suspending the suspension cage on the part of the suspension platform extending out of the outer wall of the chimney by using a suspension rope, and adjusting the height of the suspension cage by retracting the suspension rope;

the suspension cage is used as a construction operation platform and is used for filling cracks on the outer wall of the chimney; and

providing a plurality of vertical straps and annular straps, vertically attaching and fixing the vertical straps to the outer wall of the chimney, and horizontally hooping the annular straps to the vertical straps.

2. The method for reinforcing an ultra-high brick chimney according to claim 1, further comprising the steps of:

and after the annular hoop belt is horizontally hooped on the vertical hoop belt, performing two times of anticorrosion construction on the outer wall of the chimney.

3. The method for reinforcing an ultra-high brick chimney according to claim 1 or 2, further comprising the steps of:

and after the annular hoop belt is horizontally hooped on the vertical hoop belt, monitoring the stress strain, cracks, gradient and vibration speed of the chimney.

4. The method for reinforcing an ultra-high brick chimney according to claim 1, further comprising the steps of:

before filling cracks on the outer wall of the chimney, dividing the chimney into a plurality of working sections according to a spatial sequence from bottom to top;

marking cracks of the wall of the brick chimney cylinder in each divided working section;

carrying out crack detection inspection on the surface of the crack in the working section, and determining the width, depth and penetration condition of the crack;

and when the cracks on the outer wall of the chimney are filled, the cracks are filled from bottom to top.

5. The method for reinforcing an ultra-high brick chimney according to claim 1, wherein the filling of the cracks on the outer wall of the chimney comprises the following steps:

removing floating dust, loose mortar and scum at the cracks;

mixing and kneading the seam sealing material to form a caulking material, providing a conduit, embedding the caulking material into the cracks, embedding the conduit in advance, and reserving a filling port and an exhaust port on each crack;

providing grouting material, and filling the grouting material into the crack by using a conduit;

and (5) removing the catheter, and repairing and flattening the defects at the removed position by using a seam sealing material.

6. The method for reinforcing an ultra-high brick chimney according to claim 1, further comprising the steps of:

before the suspension table is fixedly arranged at the top of the chimney, a ring beam is poured at the top of the chimney;

and when the hanging table is fixedly arranged at the top of the chimney, the hanging table is fixedly arranged on the ring beam.

7. The method for reinforcing an ultra-high brick chimney according to claim 6, further comprising the steps of:

before a ring beam is poured on the top of the chimney, a man-in-the-middle platform and a groined temporary hanging frame are provided, the temporary hanging frame is arranged on the top of the chimney, the man-in-the-middle platform is arranged in the chimney, and the top of the man-in-the-middle platform is fixed in the middle of the temporary hanging frame.

8. The method for reinforcing an ultra-high brick chimney according to claim 6, further comprising the steps of:

when a ring beam is poured on the top of the chimney, providing an embedded plate, and placing the embedded plate in a pouring space of the ring beam, so that the embedded plate is embedded on the top surface of the ring beam;

and when the suspension table is fixedly arranged on the ring beam, the suspension table and the embedded plate are welded and fixed.

9. The method for reinforcing an ultra-high brick chimney according to claim 1, wherein the step of vertically attaching and fixing the vertical belt to the outer wall of the chimney comprises the steps of:

and providing chemical anchor bolts, and enabling the chemical anchor bolts to penetrate through the vertical clamp belt at intervals and be inserted into the wall of the chimney, so that the vertical clamp belt is fixed on the outer wall of the chimney.

10. The method of reinforcing a super high brick chimney as claimed in claim 1 wherein the hoop strap comprises two semi-arcuate strap sections and the step of horizontally strapping the hoop strap to the vertical strap comprises the steps of:

and connecting the corresponding ends of the two hoop sections through an adjustable-length adjusting assembly, and adjusting and shortening the length of the adjusting assembly, so that the circumference of the annular hoop is shortened, and the annular hoop is hooped on the vertical hoop.

Technical Field

The invention relates to the technical field of building construction, in particular to a method for reinforcing an ultrahigh brick chimney.

Background

In the last 50 to 80 years, chimneys were largely constructed as indispensable structures for industrial production in order to promote production and national great-rise industrial construction. The brick chimney is widely applied to industrial and civil buildings due to the advantages of local materials, simple and convenient construction and low manufacturing cost, occupies a large proportion in the constructed chimney, and has the phenomena of material aging, barrel body cracks, foundation inclination and the like after long-term use. How to realize restoration and reuse through reinforcing and transforming the existing ultrahigh chimney becomes a difficult problem to be solved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a method for reinforcing an ultrahigh brick chimney, which can solve the problem that the existing ultrahigh chimney is difficult to repair and reuse.

The technical scheme for realizing the purpose is as follows:

the invention provides a method for reinforcing an ultrahigh brick chimney, which comprises the following steps: cleaning the top of the chimney to expose the structural layer at the top of the chimney;

manufacturing a hanging table, fixedly arranging the hanging table on the top of the chimney, and enabling the end part of the hanging table to extend out of the outer wall of the chimney;

providing a suspension cage, suspending the suspension cage on the part of the suspension platform extending out of the outer wall of the chimney by using a suspension rope, and adjusting the height of the suspension cage by retracting the suspension rope;

the suspension cage is used as a construction operation platform and is used for filling cracks on the outer wall of the chimney; and

providing a plurality of vertical straps and annular straps, vertically attaching and fixing the vertical straps to the outer wall of the chimney, and horizontally hooping the annular straps to the vertical straps.

The method has the advantages that the problem that people get on the ultrahigh chimney is solved by manufacturing the hanging platform on the top of the chimney and hanging the height-adjustable suspension cage downwards, a scaffold is not required to be erected, the operation is easy, the safety is high, and the existing chimney is repaired and reused by filling cracks on the outer wall and tightening the chimney by utilizing the vertical strap and the annular strap.

The method for reinforcing the super-high brick chimney is further improved in that the method further comprises the following steps:

and after the annular hoop belt is horizontally hooped on the vertical hoop belt, performing two times of anticorrosion construction on the outer wall of the chimney.

The method for reinforcing the super-high brick chimney is further improved in that the method further comprises the following steps:

and after the annular hoop belt is horizontally hooped on the vertical hoop belt, monitoring the stress strain, cracks, gradient and vibration speed of the chimney.

The method for reinforcing the super-high brick chimney is further improved in that the method further comprises the following steps:

before filling cracks on the outer wall of the chimney, dividing the chimney into a plurality of working sections according to a spatial sequence from bottom to top;

marking cracks of the wall of the brick chimney cylinder in each divided working section;

carrying out crack detection inspection on the surface of the crack in the working section, and determining the width, depth and penetration condition of the crack;

and when the cracks on the outer wall of the chimney are filled, the cracks are filled from bottom to top.

The method for reinforcing the super-high brick chimney is further improved in that the filling of the cracks on the outer wall of the chimney comprises the following steps:

removing floating dust, loose mortar and scum at the cracks;

mixing and kneading the seam sealing material to form a caulking material, providing a conduit, embedding the caulking material into the cracks, embedding the conduit in advance, and reserving a filling port and an exhaust port on each crack;

providing grouting material, and filling the grouting material into the crack by using a conduit;

and (5) removing the catheter, and repairing and flattening the defects at the removed position by using a seam sealing material.

The method for reinforcing the super-high brick chimney is further improved in that the method further comprises the following steps:

before the suspension table is fixedly arranged at the top of the chimney, a ring beam is poured at the top of the chimney;

and when the hanging table is fixedly arranged at the top of the chimney, the hanging table is fixedly arranged on the ring beam.

The method for reinforcing the super-high brick chimney is further improved in that the method further comprises the following steps:

before a ring beam is poured on the top of the chimney, a man-in-the-middle platform and a groined temporary hanging frame are provided, the temporary hanging frame is arranged on the top of the chimney, the man-in-the-middle platform is arranged in the chimney, and the top of the man-in-the-middle platform is fixed in the middle of the temporary hanging frame.

The method for reinforcing the super-high brick chimney is further improved in that the method further comprises the following steps:

when a ring beam is poured on the top of the chimney, providing an embedded plate, and placing the embedded plate in a pouring space of the ring beam, so that the embedded plate is embedded on the top surface of the ring beam;

and when the suspension table is fixedly arranged on the ring beam, the suspension table and the embedded plate are welded and fixed.

The method for reinforcing the super-high brick chimney is further improved in that the step of vertically attaching and fixing the vertical strap to the outer wall of the chimney comprises the following steps:

and providing chemical anchor bolts, and enabling the chemical anchor bolts to penetrate through the vertical clamp belt at intervals and be inserted into the wall of the chimney, so that the vertical clamp belt is fixed on the outer wall of the chimney.

The method for reinforcing the super-high brick chimney is further improved in that the annular hoop comprises two semi-arc-shaped hoop sections, and the step of horizontally hooping the annular hoop to the vertical hoop comprises the following steps:

and connecting the corresponding ends of the two hoop sections through an adjustable-length adjusting assembly, and adjusting and shortening the length of the adjusting assembly, so that the circumference of the annular hoop is shortened, and the annular hoop is hooped on the vertical hoop.

Drawings

FIG. 1 is a flow chart of the method for reinforcing a super high brick chimney according to the present invention.

Fig. 2 is a perspective view of a temporary hanger in the method for reinforcing a super high brick chimney according to the present invention.

Fig. 3 is a top view of a temporary hanger in the method for reinforcing a super high brick chimney according to the present invention.

FIG. 4 is a side sectional view of the ring beam and the top of the chimney in the method for reinforcing the super high brick chimney.

Fig. 5 is a top view of a hanging platform in the method for reinforcing a super high brick chimney according to the present invention.

Fig. 6 is a schematic view of a suspension cage under a suspension table in the method for reinforcing an ultra-high brick chimney according to the present invention.

Fig. 7 is a schematic view of stirring grouting material in the method for reinforcing the super-high brick chimney.

Fig. 8 is a schematic structural view of grouting equipment in the method for reinforcing the super-high brick chimney.

Fig. 9 is a schematic view of the pipe pre-buried at the crack in the method for reinforcing the super high brick chimney.

Fig. 10 is a top sectional view of the vertical band and the circumferential band in the method for reinforcing the super high brick chimney according to the present invention.

FIG. 11 is a side view of the vertical band and the hoop band in the method for reinforcing an ultra-high brick chimney according to the present invention.

Fig. 12 is a side view of stress-strain monitoring performed in the ultra-high brick chimney reinforcement method of the present invention.

FIG. 13 is a side view of crack monitoring performed in the ultra-high brick chimney consolidation method of the present invention.

Description of reference numerals:

1-a chimney; 2-ring beam; 3-temporary hanging rack; 4-cushion block; 5-a person-on platform; 6-hanging the platform; 7-a main rope; 8-auxiliary rope; 9-a suspension member; 10-a suspension cage; 11-hanging holes; 12-grouting material; 13-an air compressor; 14-slurry storage tank; 15-a breather pipe; 16-a pulp supply pipe; 17-a perfusion gun; 18-cracking; 181-a catheter; 19-a vertical cuff; 20-annular hoop belt; 22-chemical anchor bolt; 23-a regulating component; 24-a surface strain gauge; 25-a joint meter.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

Referring to fig. 1, the invention provides a method for reinforcing an ultrahigh brick chimney, which is used for repairing and reinforcing an existing ultrahigh chimney and then reusing the ultrahigh brick chimney, does not need to set up a scaffold, and is easy to operate and high in safety. The method for reinforcing the super-high brick chimney is described below with reference to the accompanying drawings.

As shown in fig. 1, the method for reinforcing the super high brick chimney comprises the following steps:

step S1 is executed: and cleaning the top of the chimney 1 to expose the structural layer on the top of the chimney 1. Specifically, the lightning rod, the cement residue, the concrete and the brick blocks at the top of the chimney 1 are manually removed, so that the top surface of the chimney 1 is smooth, the inner and outer diameter sizes of the chimney 1 are easily measured, the precision of the measurement size is also improved, and the subsequent temporary hanging frame 3 is favorably arranged and the ring beam 2 is favorably poured. After the structural layer is cleaned, the thickness, the inner diameter and the outer diameter of the cylinder body are measured again.

In a preferred embodiment, the method of the present invention further comprises the steps of: as shown in fig. 2 and 3, the temporary hanging frame 3 in a shape like a Chinese character jing is welded by four L80 × 8(Q235B) angle irons according to the inner and outer diameters of the cylindrical body of the chimney 1 obtained by the retest. Preferably, before placing the temporary hanging rack 3 on the top of the chimney 1, four inverted-U-shaped steel cushion blocks 4 are buckled at positions corresponding to the connection of angle steel at the top of the chimney 1, and the temporary hanging rack 3 is supported by the cushion blocks 4 to protect the top of the chimney 1. Then, a boarding platform 5 is provided, two layers of wood boards are fully paved at the bottom of the boarding platform 5 for the worker to stand, and the top of the boarding platform 5 is fixed at the middle part of the temporary hanging rack 3, so that the boarding platform 5 is vertically arranged on the temporary hanging rack 3. Arrange temporary hanging rack 3 in chimney 1 top, the junction between the angle steel is located above corresponding cushion 4, and the platform 5 of going up is arranged in chimney 1 this moment, and the setting of temporary hanging rack 3 is convenient for follow-up circle roof beam 2 of pouring.

In a preferred embodiment, the method of the present invention further comprises the steps of: as shown in fig. 4, a ring beam 2 is poured on the top of the chimney 1, and the ring beam 2 is used for supporting a suspension bracket in subsequent construction to protect the top of the chimney 1. In this step, a constructor can stand on the boarding platform 5 to perform an operation. Specifically, the top of the chimney 1 is planted with ribs, a steel reinforcement cage and a ring beam 2 template are hoisted by using a truck crane, the steel template of the ring beam 2 is fixed by using three steel wire ropes, and the contact part of the template and the chimney 1 is tightly sealed by using a foaming agent. And (3) pouring the ring beam 2 by adopting high-strength cement, covering, watering and curing after pouring, and then removing the upper manned platform 5. Preferably, the embedded plates and the anchor bars are provided, the anchor bars are inserted into and fixed on the embedded plates, and when the ring beam 2 is poured, the embedded plates and the anchor bars are arranged at the top of a pouring space defined by the templates, so that after the ring beam 2 is poured, the embedded plates are positioned on the top surface of the ring beam 2.

Step S2 is executed: and manufacturing a hanging table 6, fixedly arranging the hanging table 6 at the top of the chimney 1, and extending the end part of the hanging table 6 out of the outer wall of the chimney 1. Specifically, as shown in fig. 5 and 6, four suspension beams are provided, preferably H-shaped steel with HW200 × 200 × 8 × 12 and strength of Q235B, and are welded to form a groined shape, and the joints are reinforced by bolts. And after the ring beam 2 reaches the design strength (C30), hoisting the manufactured suspension table 6 onto the ring beam 2 by using a truck crane, and fully welding and fixing the suspension table 6 and the embedded plate. Preferably, the connection position of the suspension beam is positioned on the embedded plate, and the embedded plate is arranged at the stress point to play a role in protecting the ring beam 2. And the length of the part of the suspension beam extending outside the outer wall of the chimney 1 is preferably 1.3 m.

Step S3 is executed: providing a suspension cage 10, using a suspension rope to hang the suspension cage 10 on the part of the suspension platform 6 extending out of the outer wall of the chimney 1, and adjusting the height of the suspension cage 10 by retracting the suspension rope. Specifically, as shown in fig. 6, two hanging members 9 are fixed to the bottom surface of each hanging beam extending from the outer surface portion of the chimney 1, hanging holes 11 are formed in the hanging members 9, the lower ends of the hanging ropes are disposed on both sides of the suspension cage 10, and the upper ends of the hanging ropes are passed through the corresponding hanging holes 11 and fixed to the corresponding hanging members 9, thereby hanging the suspension cage 10 on the suspension table 6. The cage 10 may be a finished single-person cage. The suspension ropes comprise main ropes 7 and auxiliary ropes 8, two main ropes 7 and two auxiliary ropes 8 are correspondingly arranged on each suspension cage 10, one main rope 7 and one auxiliary rope 8 are arranged on each side of each suspension cage 10, the top ends of the main ropes 7 are fixed on suspension pieces 9 close to the chimney 1, and the top ends of the auxiliary ropes 8 are fixed on the suspension pieces 9 far away from the chimney 1. In order to balance the two sides of the suspension table 6, suspension cages 10 are provided at the two symmetrical sides of the suspension table 6 to improve the construction safety. Preferably, the suspension ropes of each cage 10 are connected to two suspension beams parallel to each other, and the outer wall of the chimney 1 can be reinforced from four directions due to the cross-shaped suspension platform 6. The suspension cord is preferably a steel cord and the suspension member 9 is preferably a steel cord clamp.

In a preferred embodiment, the method of the present invention further comprises the steps of: providing a winch, arranging the winches on two sides of the suspension cage 10, winding the lower section of the suspension rope on the corresponding winch when the lower end of the suspension rope is arranged on two sides of the suspension cage 10, and operating the winch by constructors in the suspension cage 10 when the height of the suspension cage 10 needs to be adjusted to retract and release the suspension rope to realize adjustment.

In a preferred embodiment, the method of the present invention further comprises the steps of: when the suspension platform 6 is manufactured, a suspension loop is provided and is welded and fixed at the end part of the suspension beam. When the cage 10 is hung, the safety rope is provided, the upper end of the safety rope is fixed on the hanging ring, and the lower end of the safety rope is fixed on the cage 10. The safety rope has a certain length, and plays roles in preventing the cage 10 from falling and improving the construction safety.

Step S4 is executed: the suspension cage 10 is used as a construction operation platform and fills the cracks on the outer wall of the chimney 1. Specifically, the chimney 1 is first divided into a plurality of working sections, preferably four working sections, in the spatial order from bottom to top. And marking and correcting the cracks of the wall of the brick chimney 1 in each working section from bottom to top. And carrying out crack probing inspection on the marked crack surfaces, and determining the width, the depth and the penetration condition of each crack.

Then filling each crack from bottom to top, and specifically comprises the following steps:

and (4) blowing and washing the crack 18 by using a blower to remove floating dust on the surface of the crack 18, and removing loosened mortar at the crack 18, namely scum on the surface of the poor-quality brick to be peeled off.

Mixing the seam sealing material, conveying the seam sealing material to the position of a crack 18 to be repaired, rubbing the seam sealing material to form a seam embedding material, embedding the seam embedding material into the crack by using a scraper, wherein the embedding depth is preferably not less than 20mm, and cleaning the seam embedding material overflowing from the crack.

As shown in fig. 9, a guide pipe 181 is provided, the guide pipe 181 is embedded while the caulking material is embedded in the crack, and the end portion of the guide pipe 181 is fixed in the crack by the caulking material. The conduit 181 is embedded at the position of each crack 18 at intervals, the embedding depth is preferably not less than 30mm, the conduit 181 is embedded at the position of the maximum width of the crack 18, and an injection opening and an exhaust opening are reserved on each crack.

As shown in fig. 7 and 8, a grouting material 12 and a grouting apparatus are provided, the grouting apparatus including a slurry storage tank 14, an air compressor 13 connected to the slurry storage tank 14 through a vent pipe 15, and a grouting gun 17 connected to the slurry storage tank 14 through a slurry supply pipe 16, the grouting material 12 is stirred in a container, a small amount of the homogenized grouting material 12 is poured into the slurry storage tank 14, and the grouting gun 17 is connected to the end of a guide pipe, the air compressor 13 is activated to inject the grouting material 12 in the slurry storage tank 14 into the crack 18 through the slurry supply pipe 16, the grouting gun 17, and the guide pipe, and the grouting is repeated many times until the crack is filled with the grouting material 12. The grout 12 is preferably a high strength non-shrink cement grout. And (4) maintaining after grouting is finished, wherein the guide pipe cannot be pulled out during maintenance, the guide pipe is pulled out after maintenance is finished, and the defects at the pulled-out position are repaired and leveled by using a joint sealing material.

Step S5 is executed: providing a plurality of vertical bands 19 and annular bands 20, vertically attaching the vertical bands 19 at intervals along the circumference of the outer wall of the chimney 1 and fixing the vertical bands on the outer wall of the chimney 1, and horizontally hooping the annular bands 20 on the vertical bands 19. The method specifically comprises the following steps:

as shown in fig. 10 and 11, the centerline of the ladder on the outside of the chimney 1 is used as a reference point, ten equal positioning lines are marked on the outside wall of the chimney 1 according to the principle of equal division to position the vertical belt 19, and corresponding marks are made on the outside wall of the chimney 1. A temporary suspension hoop is provided, which is fixed to the outer wall of the brick chimney 1 at the top of the chimney 1 at the brick cap, and serves as a temporary suspension lifting point for the vertical belt 19.

The vertical band 19 is fixed from the bottom to the top. The method comprises the steps of firstly constructing the vertical strap 19 above the brick cap of the chimney 1, providing a chemical anchor bolt 22, bending the top of the vertical strap 19 by 90 degrees, fixing the chemical anchor bolt 22 on the upper opening and the side surface of the ring beam 2, caulking and filling gaps passing through the brick cap by using polymer mortar and quick-drying cement, and ensuring that the gaps are completely filled by the polymer mortar. The method comprises the steps of cleaning, leveling and repairing the position of a pre-fixed vertical strap 19 on the outer wall of the lower part of a brick cap of the chimney 1, polishing and flattening the protruding part, hoisting the full-length vertical strap 19 to the corresponding position and temporarily fixing the full-length vertical strap 19 with a temporary suspension hoop, and then enabling chemical anchor bolts 22 to penetrate through the vertical strap 19 at intervals, be inserted into the wall of the chimney 1 and be compressed, so that the vertical strap 19 is fixed on the outer wall of the chimney 1. In the installation process of the vertical strap 19, the position with a larger installation gap after being fixed is timely filled and compacted by caulking materials, so that the steel strap surface is prevented from being separated from the outer wall of the chimney 1.

When the hoop band 20 is provided, the hoop band is provided from top to bottom. Firstly, accurately positioning each circular hoop belt 20 and marking at least three positions; the position of the hoop 20 pre-fixed on the outer wall of the chimney 1 is cleaned, leveled and repaired, and the protruded part is polished and shaved. Adopt the truck crane to transport the hoop strap 20 that will mark corresponding mark to corresponding position department, hoop strap 20 includes two half curved hoop sections, passes through length adjustable adjusting part 23 with the tip that two hoop sections correspond and connects, transports the workman to corresponding adjusting part 23's position through the cage, adjusts the length that shortens adjusting part 23 to shorten the girth of hoop strap 20, make hoop strap 20 hoop in vertical strap 19. Further, the adjusting assembly 23 includes a pair of L-shaped members disposed opposite to each other and a screw rod connecting the pair of L-shaped members, the L-shaped members are fixed at the ends of the corresponding band sections, and the L-shaped members are provided with connecting holes corresponding to the screw rod, and the ends of the screw rod pass through the corresponding connecting holes and are screwed with a nut. When the length of the adjustment unit 23 is shortened, the nut is tightened to adjust the position where the nut is screwed on the screw, the distance between the pair of L-shaped members is shortened, and the length of the adjustment unit 23 is shortened.

After all the hoop straps 20 are installed in place, caulking and grouting are performed; filling polymer mortar into all gaps between the annular bands 20 and the vertical bands 19; and the filling of the gaps between all the annular bands 20 and the outer wall of the chimney 1 is ensured to be compact.

In a preferred embodiment, the method of the present invention further comprises the steps of: after the vertical strap 19 and the annular strap 20 are fixed, performing two-time roll coating anticorrosion construction on the outer wall of the chimney 1, wherein the time interval of the two-time roll coating is 5 hours. And then constructing a penetration-enhanced type bare concrete cover surface protective agent twice within 12h, firstly diluting the protective agent by adding one time of water, then performing roller coating operation, secondly performing roller coating construction by using a protective agent stock solution within 30min, and naturally curing for more than 1h after finishing the construction.

In a preferred embodiment, the method of the present invention further comprises the steps of: after the circumferential band 20 is horizontally looped around the vertical band 19, the stress strain, crack, inclination, and vibration speed of the chimney 1 are monitored. The step is to monitor the internal force, vibration, cracks and the whole structure inclination of the chimney 1 to avoid the influence of construction on the structure of the chimney 1, and ensure the structure safety. Specifically, as shown in fig. 12, surface strain gauges 24 are arranged on the outer wall of the chimney 1 at intervals in the vertical direction to monitor stress strain at a critical position of the chimney 1. As shown in fig. 13, the crack detectors 25 are arranged on the outer wall of the chimney 1 at intervals along the vertical direction to monitor the cracks of the key parts of the chimney 1. And inclinometers are vertically arranged on the outer wall of the chimney 1 at intervals so as to monitor the integral inclination of the chimney 1. And arranging acceleration sensors on the outer wall of the chimney 1 at intervals along the vertical direction so as to monitor the vibration speed of the chimney 1.

The method for reinforcing the super-high brick chimney has the beneficial effects that:

the method for manufacturing the hanging platform on the top of the chimney and hanging the height-adjustable suspension cage downwards solves the problem of people getting on the ultrahigh chimney, does not need to set up a scaffold, is easy to operate and high in safety, and realizes the restoration and reutilization of the existing chimney by filling cracks on the outer wall and tightening the chimney by utilizing the vertical strap and the annular strap.

While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.