烟囱滑模施工技术、烟囱施工措施（The construction technology of chimney sliding mode and the construction measures of chimney）.doc

《烟囱滑模施工技术、烟囱施工措施（The construction technology of chimney sliding mode and the construction measures of chimney）.doc》由会员分享，可在线阅读，更多相关《烟囱滑模施工技术、烟囱施工措施（The construction technology of chimney sliding mode and the construction measures of chimney）.doc（19页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、【精品文档】如有侵权，请联系网站删除，仅供学习与交流烟囱滑模施工技术、烟囱施工措施（The construction technology of chimney sliding mode and the construction measures of chimney）.精品文档.烟囱滑模施工技术、烟囱施工措施（The construction technology of chimney sliding mode and the construction measures of chimney）The construction technology of chimney sliding mod

2、e and the construction measures of chimneyI. project overview and characteristicsThis project for the valley of god biological technology group co., LTD. Power plant chimney project, the project, the chimney height of 120 meters, exit diameter of 3.5 meters, the cushion layer for the C10, basis for

3、C30, drum as a C30, lining for refractory brick acid-proof daub masonry.This project belongs to the high altitude, the difficulty is big, tall buildings construction and construction technology is complex, but my company has a group of experienced, theory and practice of battle-hardened chimney prof

4、essional construction team, both in management and the construction technology need to be able to do this project.Ii. Construction objectives1. Target: the total calendar works for 120 days, completing the total amount of work.2. Quality objectives: the acceptance rate of the subsection is 100%, the

5、 optimal rate is greater than 90%, and the engineering perception is greater than 85%.3. Cost objective: ensure the quality and safety of the project, and plan to save 17% of the project cost by means of effective management.4. Security objectives: adhere to the principle of safety first, prevention

6、 first, ensure that the general frequency of accidents is less than 1.5 , and the rate of death rate is zero, and the major and major safety accidents are eliminated.5. Environmental protection goal of civilized construction: strengthen the scientific management of construction site, meet environmen

7、tal requirements, establish humanistic engineering image, and create municipal construction site.6. Technical progress goal: the project is listed as a technical demonstration project of the enterprise, and the efficiency rate of scientific and technological progress reaches 1.5 .7. Service goal: to

8、 establish the owner to meet the construction process, and to track the quality of the project for three years.Construction and deployment1. Main construction techniques1.1 the overall template construction is adopted by using the shaft frame.1.2 construction of concrete pouring and construction of

9、reinforced concrete tube with inner lining.2. Construction processConstruction preparation - digging - cushion to equipment assembly, foundation of the whole board to backfill, concrete casting tube body and lining concrete casting pouring each paragraph (1.25 m) - thermal insulation masonry each pa

10、ragraph (1.25 m) - shell concrete castingInstallation of the signal platform, installation of the climbing ladder, the installation of the lightning protection electrical installation, the application of the air sign painting, the removal of the equipment, the construction of the smoke barrier wall,

11、 the clearance.Iv. Main construction technology plan1. Installation of internal derrick, platform and lifting systemThe overall construction process is as shown in figure 1.1.1 construction of derrick installationInternal vertical height of 1.25 m, the adoption steel pipe scaffold erection, standing

12、 pole level interval of 1.5 m, the level of rail vertical interval of 1.15 m, according to the diameter of chimney set-up, than the degree of its diameter reduced gradually along with the lining size (into the frame after checking see attachment 1). When setting up the steel pipe frame, insert the e

13、nd of the steel tube into the lining brick masonry, and place it on the brick masonry (see the figure below:). In the height direction, every 10 m bracket must be around four pole elongation, until both ends of the anchor into the wall concrete 50 mm, with reinforced concrete wall, guarantee and fra

14、me strength and stability, in extreme when installation package on isolated cement concrete, so as to avoid the future couldnt open the steel tube (see image below: detailed B).Chimney construction shaft frame is increased with the chimney wall construction, installation height is beyond + / - 0.000

15、 for the first time in 3 5 m, the bottom of the derrick bearing based on the concrete floor, foundation concrete surface of the steel plate should be related to cushion flat. When the cage is mounted on the derrick,Place in a specified silo beforehand. All personnel must be equipped with safety belt

16、 and skid insulated shoes when setting up. When the pipe is up, it must be hoisting.1.2 operation platform constructionThe operating platform has two floors, the lower layer is the brickwork binding, the upper layer is the lifting plate, the supporting plate is set, the concrete is used. On the oper

17、ating table spread 50 x 300 wooden board, wood board and derrick steel pipe with strong brown or 8 wire binding and firm, not a blind leap, should tightly, board with board between seam, wooden plank with large gap between the steel tube with a narrow strip or a metal block. The operating table rise

18、s with the derrick, and the board is used to prepare three sets of turnover.In the middle of the well frame, set apart the square hole of 0.9 x 0.0.9 m, and the loading port of the drum, and a 0.2 by 0.2 m hole in the center position, as the hole of the center line of the cylinder in the constructio

19、n process. Make 1.2 m * 1.2 m sealing plate. After the bucket is up to the platform, it is used to seal the hole and place the wheelbarrow when unloading, and the normal personnel walk to ensure the safety.There is no outer ring platform on the derrick, and the people who tighten the wire fly only t

20、ighten at the outside. When the die and the lifting template, each person is standing in the ring wall of the ring, not outside construction. If the surface quality problem of concrete is needed to be dealt with, the personnel on the external ladder will be processed.Corresponding position, outside

21、the chimney so we have set up a 3.8 m high external gym, can facilitate the relevant personnel security through the chimneys of the ladder, the ladder up to the platform in the plugin, for the construction and quality inspection. This is shown in the figure below.Description:1. The platform and the

22、platform of the platform and the protection platform4. Corner pulley 57. Place all kinds of power distribution boxes and tools in the tent, and cover with asbestos tiles to prevent rain, sun protection, andSet the lightning rod to connect with the steel tube frame lightning protection system to prev

23、ent lightning.Operating platform and external ladder diagram1.3 internal and external lifting system constructionThe vertical lifting device in the chimney USES 5t hoist, with a diameter of phi 14 wire rope, through the bucket. The bucket is round, welded with 6mm thick steel plate, high 700mm, the

24、bottom diameter of 650mm, the outer diameter of 750mm, the base plate is fixed with pin shaft, can turn up and down the sealing material or open the unloading material up and down. During the construction process, check the flatness of the base plate regularly, and put the steel bars, steel pipes an

25、d fastening pieces in light, so as to avoid the deformation of the base plate and the slurry leakage.Due to the high difference between the existing ground and the plus or minus 0.000, a small steel tubular gantry frame will be set up at plus or minus 0.000, and the lifting equipment of the gantry f

26、rame will be equipped with a 3t hoist with a diameter of phi 14 wire rope. The vertical lifting equipment of the external gantry derrick adopts the 3t hoist, which can be used up and down.By cart or artificial will be transported to the gantry steel, concrete, etc, on the stage of the gantry to flue

27、 platform, inside the safe passage of the flue platform and level transport in the chimney derrick, level and vertical transformation. The steel bar, steel and concrete are hoisting to the upper part of the construction platform with the hoisting barrel in the derrick, and the opening of the letter

28、is sealed with the platform. Remove the steel and steel pipe, and transfer it to the necessary part of the binding, remove the concrete into the wheelbarrow, and push it to the concrete pouring site and pouring.Derrick and gantry with increased within days pulley installed on the top of the derrick

29、pulley fixed on the shelf, pulley fixed with four to eight root diagonal reinforcement, bearing, at least eight fasteners on the slider moving load is: 2 x 1 t = 2.6 t, and the dynamic load in each fastener is: 2.6 8 = 0.325 t/t (3.25 KN), can satisfy completely the requirements of bearing capacity.

30、 Here is the diagram below.Sky slide bar, floor planThe lifting speed is 30-440m/min (round trip to 3-5min), or 60m/min (around 3min back and forth), at least 120m in volume and at least 250m in length. 3t hoist requirements: the lifting speed can be 30-440m/min (1 min back and forth).The 3t winder

31、USES Angle steel to hold the anchor pile, 5t winch with 13mm steel wire rope to anchor the beam, plate and column of flue, and remove the beam, plate reinforcement and welding anchor hoist frame.1.4 construction of protective shedDerrick inside the chimney, high set 5 m place a double protective cas

32、ing, to prevent the upper construction objects falling, ensure the safety of construction personnel under the shaft frame work station under full load, and used for vertical transportation. A safe passage is set up on the flue platform and a double protective shed at the top of the channel. And the

33、outer longgate lifting roof has a double protection shed. Double layer protection shed with two floor space of 500mm. See figure 1.2. Concrete construction of chimneyIt adopts round-the-clock operation, with 50 employees working in rebar, carpentry, welder, electrician, concrete work and machine ope

34、rator every day to ensure the progress of the project.Tube body construction quality requirements: in construction engineering, must ensure that the tube body center verticality deviation is not more than 60 mm, wall thickness error of less than 20 mm, tube body radius error on any section shall not

35、 be greater than 1% of the radius, and no more than 30 mm. Smoke crossing of centerline deviation shall not be greater than 15 mm, elevation deviation of flue within 20 mm, inside and outside wall and on the back of the local uneven, shall not exceed 1% of the cross section and not more than 30 mm,

36、smoke crossing shall not be greater than 30 mm, height and width is not less than 20 mm.2.1 construction of the shift template2.1.1 the structure of the moving templateThe outer mold of the barrel is made of 2mm thick, 1000 x 200 m of white sheet metal, each sheet metal processing is divided by the

37、charge. Each set of templates set aside 1m on both sides. The scores were received twice, at a height of 1.25 metres. The outer surface of the chimney can be clean, beautiful and fast, and the body of the tube is the same.Template used in brick lining and wedge, the combination of steel template: ma

38、sonry chimney lining first, between the lining and steel bar, put inside steel template, reoccupy deformation fir processed into the same wedge batten with air thermal insulation layer thickness, material measures, in between steel and brick masonry, the formation of air thermal insulation layer. Th

39、e wedge-shaped wood is made of 3cm thick wood in the woodworking planer. Since the air insulation layer is 100mm and 50mm, the wedge is divided into two kinds, one is 75mm and 25mm, the other is 30mm and 20mm. In the construction, bricklaying in 6 3 hours, there is a certain time to prepare for inte

40、rnal model, therefore, the time interval for bricklaying and internal model is in commonly 4 to 7 hours, and pouring concrete extremely slowly,The strength of mortar can withstand the construction load of internal mold and concrete.Template according to our company for many years practical experienc

41、e, the use of 2 mm thick tin according to the outer wall of the chimney dividing divide into four groups, each group of all points on both sides to set aside the template, according to the distance between 2 m in the upper portion of the plate in each group, namely every other piece of board welding

42、 ascension template with phi 14 steel hook. The two iron sheets are drilled with electric drill, and anchored by anchoring screw. The anchor screw is made out of the inner surface to make the inside of the metal surface flush with the metal surface, and the connection is welded by welding spot. In e

43、ach sheet metal, connect 250mm to the seam, welding two lines of wire rope connector, in order to wear the steel wire rope in the fastening formwork, tighten the external mold when casting concrete. Will 18 to 28 lifter stents form a complete set of 18 to 28 lifter (1 t) installed on the vertical re

44、inforced with the operating table, with concrete to form removal strength after 1.2 n/m , with uniform outside the lifter will die one day.The inside and outside templates are bound or welded to the steel bar of the cylinder wall with a steel bar of 12, to ensure the net spacing of the internal and

45、external modes and the thickness of the inner and outer coatings. The length of the steel bar and the thickness of the cylinder wall. Place the spacing along the circumference of the circle at 250mm.Weld with phi 25 steel bars as shown in FIG. 2, and tie the steel wire with three - four - four - to

46、- four - wire to the vertical steel bar. The load on each lifter is (considering the dynamic load coefficient 1.4) :1.4 x (41 * 1.35 * 0.00127 * 0.00127 * 103 + 18 * 36 * 18/100) 28638.03/28 = 1.4 x = 31.9 x 10-2 knThis force is relatively small, the 1t lift and the lifting frame with phi 25 steel w

47、elding can be completely bearable.2.1.2 installation of the shift templateInternal template installation: before installing the inner mould, masonry the brick masonry lining of the chimney, and determine the center line and the radius, so as to control the installation radius of the internal templat

48、e and the fixed template. After putting in the inner steel plate, a wooden wedge is added between the lining and the steel mould (a set of wood wedge thickness is consistent with the thickness of the air insulation layer), and the steel mould is supported with wood support. The wooden wedge is place

49、d in a circle in the direction of 100mm in the direction of the circle. The wooden support is set up and down according to the position of the inner die sheet. When concrete is cast, then remove it.Mould installation: external mold installation calibration after reaching the size of the requirements, use temporary brace design wall thickness control template net distance, both inside and outside and outside mode and the main mode of