Construction method of high-curvature roof concrete

Abstract

This invention relates to a construction method for high-curvature roof eaves concrete, comprising the following steps: establishing a double-layer steel mesh, prefabricating upper and lower formwork, assembling the bottom formwork for pouring, assembling the top formwork for pouring, fixing the steel mesh to the bottom formwork, and then fixing the top formwork to the bottom formwork; pouring concrete to bond the concrete with the steel mesh; covering and curing with a membrane, installing a spraying device at the ridge to spray and cure the roof and eaves; this invention overcomes the phenomenon of concrete slippage, improves the quality of concrete forming, and adds polypropylene anti-crack fibers during concrete preparation, effectively reducing the phenomenon of concrete cracking during forming. Furthermore, the installation of the spraying device at the ridge allows for spraying and curing operations on the eaves, solving the problem of inconvenience in later curing due to the inconvenience of standing manually on the sloping roof, which affects the quality of concrete forming.

Description

Technical Field

[0001] This invention relates to a construction method for high-curvature roof eaves concrete, belonging to the field of building construction technology. Background Technology

[0002] High-curvature eaves are typically found in antique-style buildings. They are usually cast in one piece with the sloping roof of the antique-style building, and are generally constructed using concrete casting to form the sloping roof and eaves as a single unit.

[0003] For example, CN104674999A, the method for intermittent formwork and concrete pouring of pitched roofs, is an effective method to overcome the technical difficulties of pouring concrete on sloping roof surfaces.

[0004] Currently, the construction methods for high-curvature eaves concrete are basically based on single-layer formwork. This construction method is limited by the slope of the sloping roof, which easily leads to concrete slippage and segregation. In addition, the cracking rate of the concrete after it is formed is high, which affects the quality of building construction. At the same time, due to the slope of the sloping roof, it is inconvenient for maintenance personnel to stand on the roof to carry out spray curing operations after the concrete is formed, which also affects the quality of the concrete in the later stage of forming. Summary of the Invention

[0005] The purpose of this invention is to provide a construction method for high-curvature roof eaves concrete to solve the problems mentioned in the background art.

[0006] The technical solution of the present invention is as follows:

[0007] A construction method for high-curvature roof eaves concrete includes the following steps:

[0008] Step 1: Erect the internal scaffolding, establish a double-layer steel mesh, and use steel stirrups to support the two layers of steel mesh;

[0009] Step 2: Prefabricate the upper and lower formwork, which are prefabricated according to the curvature of the eaves construction surface;

[0010] Step 3: Assemble the lower formwork to form the bottom formwork. Assemble the bottom formwork for pouring and fix it to the supporting scaffolding.

[0011] Step 4: Assemble the top formwork to form the top formwork. Assemble the top formwork for pouring, fix the steel mesh to the bottom formwork, and then fix the top formwork to the bottom formwork.

[0012] Step 5: Concrete pouring. Pour concrete into the top and bottom formwork to bond the concrete with the steel mesh.

[0013] Step Six: Covering and Curing. After the concrete has set, remove the top formwork and cover the poured surface with geotextile.

[0014] Step 7: Install the sprinkler system. Install the sprinkler system at the ridge to spray and maintain the roof and eaves.

[0015] Preferably, in step one, when binding the reinforcing mesh, a protective layer is prefabricated first, and a reinforcing pad is made of cement mortar. The reinforcing pad is then bound to obtain the reinforcing mesh structure.

[0016] Preferably, before step one, the construction site is modeled according to the design drawings to establish a construction site model; the construction site is laid out and surveyed to measure the site parameters.

[0017] Preferably, in step five, the specific construction method for concrete pouring is as follows:

[0018] S1: First, prepare concrete. After mixing concrete with sand and gravel, add polypropylene crack-resistant fiber to the mixed mortar and mix. The weight ratio of polypropylene crack-resistant fiber to mixed mortar is 1:50-1:70.

[0019] S2: Observation ports are set at equal intervals on the top formwork. During concrete pouring, the observation ports are used to ensure that the concrete overflows from each section before the observation ports are closed, so as to achieve the effect of layered pouring.

[0020] Preferably, the observation port has a 100×100mm structure.

[0021] Preferably, the top formwork and the bottom formwork form a double-layer template structure, and the spacing between adjacent steel stirrups between the top formwork and the bottom formwork is 0.9-1m.

[0022] Preferably, the spraying device includes:

[0023] The mounting tube has inclined tubes hinged to both opposite sides;

[0024] Base plate, which is installed at the lower end of the mounting pipe;

[0025] The fastener is pre-embedded and fixed at the ridge;

[0026] The base plate and the fixing component are detachably connected and fitted together.

[0027] The first telescopic device is connected at both ends to the inclined tube and the mounting tube, respectively.

[0028] Spray head, several of the spray heads are installed along the length of the inclined tube;

[0029] The water supply pipe is connected to the nozzle through the installation pipe and the inside of the inclined pipe.

[0030] Preferably, the fastener includes an anti-crush sleeve and a threaded cylinder disposed inside the anti-crush sleeve. The anti-crush sleeve is pre-embedded and fixed at the ridge, and the bolt rod passes through the base plate and is screwed into the threaded cylinder.

[0031] Preferably, it also includes a fastener, the fastener including a motor and a winding roller at the output end of the motor, the outer wall of the winding roller has a winding groove, a cable is wound in the winding groove, and one end of the cable is connected to the inclined tube.

[0032] Preferably, the base plate has multiple sets arranged along the length of the ridge, and the base plate has a sliding groove along its arrangement direction. The inner sidewall of the sliding groove has a limiting hole. The lower end of the mounting tube is equipped with a slide rail, which slides in conjunction with the sliding groove. Both ends of the base plate are equipped with a second telescopic device, which extends and retracts along the length of the slide rail. The output end of the second telescopic device is equipped with a third telescopic device, which is used to drive the limiting member at its output end to enter and exit the limiting hole.

[0033] The present invention has the following beneficial effects:

[0034] This invention combines the top and bottom molds before pouring, overcoming concrete slippage and segregation, significantly improving concrete forming quality. Furthermore, polypropylene anti-crack fibers are added during concrete preparation, effectively reducing cracking during forming and lowering the crack incidence rate, further improving concrete forming quality. Additionally, the spraying device is installed at the ridge, using two inclined pipes to cover the sloping sides of the ridge during curing, and can also spray the eaves, solving the problem of inconvenience caused by the sloping roof making it difficult for workers to stand, thus affecting concrete forming quality during later curing.

[0035] This solves the problem that the inconvenience of standing manually on a tilted roof, which leads to difficulties in the later maintenance process and affects the quality of concrete forming; later, the entire spraying device can be removed simply by disassembling the installation pipe, which improves the overall economic feasibility and recyclability of the spraying curing device. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the spray device structure of the present invention;

[0037] Figure 2 This is a cross-sectional view of the fastener of the present invention;

[0038] Figure 3 This is a bottom view of the fixed disk of the present invention;

[0039] Figure 4 This is a side view of the fastener structure of the present invention;

[0040] Figure 5 This is a cross-sectional view of the inclined tube of the present invention;

[0041] Figure 6 This is a schematic diagram of the sliding rail and several base plates at the lower end of the mounting pipe of the present invention.

[0042] Figure 7 This is a schematic diagram of the slide rail structure of the present invention.

[0043] The reference numerals in the figure are as follows:

[0044] 1. Mounting pipe; 2. Base plate; 3. Fixing component; 4. Support plate; 5. First telescopic device; 6. Inclined pipe; 7. Fastener; 8. Cable; 9. Anti-crush sleeve; 10. Threaded cylinder; 11. Bolt rod; 12. Fixing plate; 13. Mounting hole; 14. Fixing plate; 15. Winding roller; 16. Winding groove; 17. Motor; 18. Water supply pipe; 19. Nozzle; 20. Slide rail; 21. Slide groove; 22. Limiting hole; 23. Second telescopic device; 24. Third telescopic device; 25. Limiting component. Detailed Implementation

[0045] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0046] Example 1:

[0047] like Figure 1-5 As shown:

[0048] The construction method specifically includes the following steps:

[0049] Step 1: BIM modeling. Based on the design drawings, model the construction site and create a construction site model.

[0050] Step 2: Surveying and setting out, conducting a survey and setting out of the construction site, and measuring the site parameters;

[0051] Step 3: Erect the internal frame and build a double-layer steel mesh. The two layers of steel mesh are supported by steel stirrups. The connection between the steel stirrups and the steel mesh is fixed by spot welding. When binding the steel mesh, a protective layer is prefabricated first. A steel pad is made of cement mortar and the steel pad is then bound to it to obtain the steel mesh structure.

[0052] Step 4: Precast formwork on the roof slab. Precast the upper and lower formwork on the roof slab, taking into account the curvature of the eaves surface.

[0053] Step 5: Assemble the lower formwork to form the bottom formwork. Assemble the bottom formwork for pouring and fix it to the supporting scaffolding.

[0054] Step Six: Assemble the upper formwork to form the top formwork. Assemble the top formwork for pouring, fix the steel mesh to the bottom formwork, and then fix the top formwork to the bottom formwork.

[0055] Step 7: Concrete pouring. Pour concrete into the top and bottom formwork to bond the concrete with the steel mesh.

[0056] Step 8: Curing with a membrane. After the concrete has been poured and set, wait until the concrete strength reaches 1.2 N / mm². 2 Remove the top formwork and cover the pouring surface with geotextile.

[0057] Step 9: Install the sprinkler system. Install the sprinkler system at the ridge to spray and maintain the roof and eaves.

[0058] In step seven, the specific construction method for concrete pouring is as follows:

[0059] S1: First, prepare concrete. After mixing concrete with sand and gravel, add polypropylene crack-resistant fiber to the mixed mortar and mix. The weight ratio of polypropylene crack-resistant fiber to mixed mortar is 1:50.

[0060] S2: Set 100×100mm observation ports at equal intervals on the top formwork. During concrete pouring, observe the observation ports to ensure that the concrete overflows from each section before sealing the observation ports to achieve the effect of layered pouring.

[0061] The top and bottom forms a double-layer formwork structure, and the spacing between adjacent steel stirrups between the top and bottom forms is 0.9-1m.

[0062] In step nine, the spraying device includes an installation pipe 1, a base plate 2 at the bottom of the installation pipe 1, and several fasteners 3 equidistantly arranged through the outside of the base plate 2. Support plates 4 are installed on both sides of the installation pipe 1, and inclined pipes 6 are connected to the upper sides of the support plates 4 on both sides of the installation pipe 1 via a rotating shaft. A first telescopic device 5 is installed between the bottom of the inclined pipe 6 and the top of the support plate 4. Fasteners 7 are installed on both sides of the installation pipe 1 near the top, and a cable 8 is provided between the fasteners 7 and the inclined pipe 6.

[0063] Both ends of the first telescopic device 5 are movably connected to the support plate 4 and the inclined tube 6 respectively via rotating shafts.

[0064] The fastener 3 includes an anti-extrusion sleeve 9, which has a certain elastic deformation capacity to help adapt to the solidification of concrete. A threaded cylinder 10 is installed inside the anti-extrusion sleeve 9, and the inside of the threaded cylinder 10 is threadedly connected to the bolt rod 11. A fixing plate 12 is installed on the top of the bolt rod 11.

[0065] A number of mounting holes 13 are equidistantly provided at the top edge of the fixed plate 12, and a number of mating holes that overlap with the mounting holes 13 are provided on the top surface of the base plate 2. The bolt 11 passes through the bottom surface of the base plate 2 and is screwed to the threaded cylinder 10. The bottom surface of the fixed plate 12 is supported by the top surface of the base plate 2.

[0066] After the bolt 11 engages with the threaded cylinder 10, the fixing plate 12 rotates until the mounting hole 13 and the mating hole coincide. Then, a fixing bolt is added to fix the fixing plate 12, thereby further reinforcing the base plate 2 and improving the stability of the mounting tube 1.

[0067] The fastener 7 includes a fixing plate 14, a winding roller 15 is mounted on the rear of the fixing plate 14, and a motor 17 is mounted on the front of the fixing plate 14. The drive shaft of the servo motor 17 passes through the interior of the fixing plate 14 and is fixedly connected to the winding roller 15. The winding roller 15 has a winding groove 16 for winding the cable 8 on its exterior.

[0068] The inclined tube 6 is equipped with a water supply pipe 18 (flexible hose), and several nozzles 19 are connected to the bottom of the water supply pipe 18. The nozzles 19 protrude from the bottom surface of the inclined tube 6.

[0069] Two inlets are provided at the lower front of the installation pipe 1, and the two inlets are arranged parallel to each other in the horizontal direction.

[0070] After the water supply pipe 18 is inserted into the inlet, it is then inserted into the inclined pipe 6. The nozzle 19 is then installed. Water can then be pumped into the water supply pipe 18 and sprayed out by the nozzle 19 to cure the poured slope and the eaves area.

[0071] When using the sprinkler system, it is installed at the ridge. During the ridge pouring, the opening of the threaded cylinder 10 is first blocked, and the anti-extrusion sleeve 9 is poured along with the threaded cylinder 10 to the ridge for pre-embedding. Then, the blocked part of the threaded cylinder 10 is opened, the base plate 2 is placed on top of the threaded cylinder 10, and the bolt rod 11 is passed through the base plate 2 and screwed to the threaded cylinder 10 for fixation. Then, the fixing plate 12 is fixed to the base plate 2 with bolts to complete the fixing operation of the base plate 2. At this time, the water supply hose 18 is sent in from the inlet and water is supplied by the water pump. The inclined pipe 6 is kept parallel to the sloping roof. Water can be sprayed from nozzle 19 to maintain the sloping roof and the eaves area after pouring, effectively solving the problems of difficulty in standing and maintenance. The inclination of the inclined tube 6 can be adjusted. By extending the first telescopic device 5, one end of the inclined tube 6 is rotated by a pivot, thereby changing the angle with the installation tube 1 and thus changing the inclination to suit different sloping roofs. At the same time, fasteners 7 are used to tighten the cable 8, and motor 17 drives the winding roller 15 to rotate and wind the cable 8, so that the cable 8 is in a taut state, thereby ensuring the stability of the inclined tube 6.

[0072] Example 2: Includes all the content of Example 1:

[0073] like Figure 6 As shown, a slide rail 20 is fixedly installed at the lower end of the mounting pipe 1. Several base plates 2 are arranged along the length of the ridge. The top wall of the base plate 2 is provided with a "T"-shaped slide groove 21. The slide rail 20 slides in cooperation with the slide groove 21. The slide rail 20 is relatively long and slides in cooperation with the slide groove 21 of at least two sets of base plates 2 at the same time.

[0074] A second telescopic device 23 is installed at both ends of the slide rail 20. A third telescopic device 24 is installed at the output end of the second telescopic device 23. A limit piece 25 is installed at the output end of the third telescopic device 24. A limit hole 22 (blind hole) is opened on the inner side wall of the slide groove 21 of the base plate 2.

[0075] The third telescopic device 24 drives the limiting member 25 to be inserted into the limiting hole 22, thereby fixing the slide rail 20 relative to the base plate 2.

[0076] When it is necessary to adjust the relative position of the installation pipe 1 along the length of the roof ridge, it is beneficial to expand the spray area of ​​the nozzle 19.

[0077] At this time, the third telescopic device 24 of one group is controlled to drive the limiting member 25 to disengage from the limiting hole 22. Then, the second telescopic device 23 corresponding to this third telescopic device 24 extends, driving the corresponding third telescopic device 24 and the limiting member 25 to move into the slide groove 21 of the adjacent bottom plate 2. Then, the third telescopic device 24 extends, driving the limiting member 25 to insert into the limiting hole 22 of the slide groove 21 of this bottom plate 2, thereby achieving fixation.

[0078] Then, another set of second telescopic devices 23 are extended to push the slide rail 20 to slide and adjust its position within several slide grooves 21. Then, another set of third telescopic devices 24 drives the limiting member 25 to disengage from the corresponding limiting hole 22. Then, the second telescopic device 23 shortens, causing the corresponding third telescopic device 24 and the limiting member 25 to move into the slide groove 21 of the adjacent base plate 2. Then, the third telescopic device 24 extends to drive the limiting member 25 to insert into the limiting hole 22 of the slide groove 21 of the base plate 2, thereby fixing it.

[0079] The position of the slide rail 20 relative to several base plates 2 is adjusted by the cooperation of two sets of second telescopic devices 23, two sets of third telescopic devices 24, limiting holes 22, and limiting parts 25, thereby controlling the movement of the installation pipe 1 along the length of the ridge.

[0080] The first telescopic device 5 and the second telescopic device 23 can be electric telescopic rods; the third telescopic device 24 can be a telescopic electromagnet. When the telescopic electromagnet is energized, it drives the limiting member 25 to disengage from the limiting hole 22. When the telescopic electromagnet is de-energized, its elastic force pushes the limiting member 25 closer to the inner wall of the slide groove 21. This facilitates the movement of the third telescopic device 24 and the limiting member 25 into another set of slide grooves 21 after the second telescopic device 23 drives it. The elastic force of the telescopic electromagnet then helps to push the limiting member 25 into the limiting hole 22.

[0081] The two ends of the slide groove 21 of the base plate 2 are chamfered to facilitate the insertion of the end of the slide rail 20.

[0082] Real-time Example 3 includes all the content of Example 2:

[0083] During construction, there are deviations between the relative positions of two adjacent base plates 2 and two adjacent sliding grooves 21 and the preset positions;

[0084] Therefore, as Figure 7 As shown, the slide rail 20 includes several sliders 201. Two adjacent sliders 201 are connected by universal joints 202. The rotation angle of the universal joints 202 is set within 0-5°. Magnetic elements are provided between two adjacent sliders 201 to attract each other, and elastic elements are provided to keep them in a 0° parallel state under normal conditions. After the slider 201 at the end is inserted into the slide groove 21 under the guidance of the chamfer of the slide groove 21, the two adjacent sliders 201 are adjusted and adapted by the universal joints 202 because there is a deviation between two adjacent sets of slide grooves 21.

[0085] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A high-cambered roof concrete construction method, characterized by, Includes the following steps: Step 1: Erect the internal scaffolding, establish a double-layer steel mesh, and use steel stirrups to support the two layers of steel mesh; Step 2: Prefabricate the upper and lower formwork, which are prefabricated according to the curvature of the eaves construction surface; Step 3: Assemble the lower template to form the bottom formwork. Assemble the bottom formwork for pouring and fix it to the supporting scaffolding. Step 4: Assemble the top formwork to form the top formwork. Assemble the top formwork for pouring, fix the steel mesh to the bottom formwork, and then fix the top formwork to the bottom formwork. Step 5: Concrete pouring. Pour concrete into the top and bottom formwork to bond the concrete with the steel mesh. Step Six: Covering and Curing. After the concrete has set, remove the top formwork and cover the poured surface with geotextile. Step 7: Install the sprinkler system. Install the sprinkler system at the ridge to spray and maintain the roof and eaves. The spray system includes: Installation pipe (1), with inclined pipes (6) hinged on both sides of the installation pipe (1); The base plate (2) is installed at the lower end of the mounting pipe (1); Fastener (3), the fastener (3) is pre-embedded and fixed at the ridge; The base plate (2) and the fastener (3) are detachably connected and fitted; The first telescopic device (5) is connected at both ends to the inclined tube (6) and the installation tube (1), respectively. Sprayer (19), several sprayers (19) are installed along the length of the inclined tube (6); Water supply pipe (18) is connected to nozzle (19) through the inside of installation pipe (1) and inclined pipe (6); The base plate (2) has multiple sets arranged along the length of the ridge. The base plate (2) has a sliding groove (21) along its arrangement direction. The inner side wall of the sliding groove (21) has a limiting hole (22). The lower end of the mounting pipe (1) is equipped with a slide rail (20). The slide rail (20) slides in conjunction with the sliding groove (21). Both ends of the slide rail (20) are equipped with a second telescopic device (23). The output end of the second telescopic device (23) extends and retracts along the length of the slide rail (20). The output end of the second telescopic device (23) is equipped with a third telescopic device (24). The third telescopic device (24) is used to drive the limiting piece (25) at its output end to enter and exit the limiting hole (22).

2. The construction method for high-curvature roof eaves concrete as described in claim 1, characterized in that: In step one, when binding the steel mesh, a protective layer is first prefabricated, and a steel mesh pad is made of cement mortar. The steel mesh pad is then bound to obtain the steel mesh structure.

3. The construction method for high-curvature roof eaves concrete as described in claim 1, characterized in that: Before step one, the construction site is modeled according to the design drawings to establish a construction site model; the construction site is laid out and surveyed to measure the site parameters.

4. The construction method for high-curvature roof eaves concrete as described in claim 1, characterized in that: In step five, the specific construction method for concrete pouring is as follows: S1: First, prepare concrete. After mixing concrete with sand and gravel, add polypropylene crack-resistant fiber to the mixed mortar and mix. The weight ratio of polypropylene crack-resistant fiber to mixed mortar is 1:50-1:

70. S2: Observation ports are set at equal intervals on the top formwork. During concrete pouring, the observation ports are used to ensure that the concrete overflows from each section before the observation ports are closed, so as to achieve the effect of layered pouring.

5. The construction method for high-curvature roof eaves concrete as described in claim 4, characterized in that: The observation port has a 100×100mm structure.

6. The construction method for high-curvature roof eaves concrete as described in claim 1, characterized in that: The top formwork and bottom formwork form a double-layer template structure, and the spacing between adjacent steel stirrups between the top formwork and bottom formwork is 0.9-1m.

7. The construction method for high-curvature roof eaves concrete as described in claim 1, characterized in that: The fastener (3) includes an anti-squeezing sleeve (9) and a threaded cylinder (10) disposed inside the anti-squeezing sleeve (9). The anti-squeezing sleeve (9) is pre-embedded and fixed at the ridge. The bolt (11) passes through the base plate (2) and is screwed into the threaded cylinder (10).

8. The construction method for high-curvature roof eaves concrete as described in claim 1, characterized in that: It also includes a fastener (7), which includes a motor (17) and a winding roller (15) at the output end of the motor (17). The outer wall of the winding roller (15) is provided with a winding groove (16), and a cable (8) is wound in the winding groove (16). One end of the cable (8) is connected to the inclined tube (6).

Images