Construction method of flower basket type cantilever scaffold for composite heat preservation

Abstract

The invention relates to the technical field of building construction, discloses a construction method of a flower basket type cantilever scaffold for composite heat preservation, and aims at solving the technical problems that a composite heat preservation wall needs to be chiseled in the later period during installation of a traditional cantilever scaffold, a heat preservation layer and a concrete structure are prone to being damaged, heat bridge and leakage hidden dangers are generated, the construction efficiency is low, and the positioning precision is poor. According to the technical scheme, the method is characterized by comprising the steps that firstly, wall steel bars are bound, a composite heat preservation layer with a through hole is installed on the outer side, then a hollow quadrangular frustum pyramid-shaped formwork arranged corresponding to the through hole is fixed to an outer formwork, the through hole is sealed, an inner formwork is installed on the inner side, and an embedded sleeve corresponding to the formwork is arranged; after the poured concrete reaches the standard, relevant parts are dismantled to form mounting holes, and finally the I-shaped steel beams penetrate through the holes and are fixed to the sleeves through high-strength bolts. The method is mainly used for mounting the cantilever scaffold heavy frame in a composite thermal insulation wall building, structural damage can be avoided, the construction efficiency and the mounting precision are improved, and the thermal insulation energy-saving performance and the structural safety of the building are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction. More particularly, the present application relates to a flower basket type cantilevered scaffold construction method for composite thermal insulation. BACKGROUND

[0002] With the improvement of building energy saving requirements, composite thermal insulation systems are widely used. When installing traditional cantilevered scaffolds on such walls, the existing I-beam installation generally adopts a rear chiseling installation flower basket type cantilevered I-beam. However, the rear chiseling will seriously damage the continuity and integrity of the thermal insulation layer, forming a "thermal bridge", affecting the building energy saving effect, and the damaged part is difficult to repair perfectly, there is a risk of leakage, the rear chiseling needs manual chiseling and repairing, which takes a long time (a single beam may take more than half a day), and the dust and noise pollution generated by chiseling is large, which does not meet the green construction requirements. Therefore, there is an urgent need for a construction method that can realize precise, efficient and non-destructive installation. SUMMARY

[0003] Another object of the present application is to provide a flower basket type cantilevered scaffold construction method for composite thermal insulation.

[0004] In order to achieve these objects and other advantages according to the present application, a flower basket type cantilevered scaffold construction method for composite thermal insulation is provided, comprising the following steps: Step one, binding the wall steel bars and installing a composite thermal insulation layer outside the wall steel bars, the composite thermal insulation layer is provided with a plurality of through holes, and the composite thermal insulation layer is an integrated thermal insulation board or a combination of a thermal insulation board and a concrete layer; Step two, fixing a plurality of formworks on an outer formwork, and then installing the outer formwork outside the composite thermal insulation layer, the central axis of the formwork is horizontally arranged, wherein the plurality of formworks are arranged one-to-one corresponding to the plurality of through holes, the formwork is a hollow quadrangular pyramid with a taper of 1:10 and a closed small end, the small end of the formwork is located in the through hole, and the gap between the formwork and the through hole is sealed to block the through hole, and the end face of the small end of the formwork is flush with the inner surface of the composite thermal insulation layer; Step three, installing a shear wall inner formwork inside the wall steel bars, and arranging a plurality of embedded sleeves between the inner formwork and the composite thermal insulation layer, the plurality of embedded sleeves correspond to the plurality of small ends of the formworks and the sleeve end is in contact with the formwork, then pouring concrete between the inner formwork and the composite thermal insulation layer, after the concrete strength reaches the specified requirement, the outer formwork, the inner formwork and the formwork are removed, forming an installation hole for accommodating the end of the I-beam; Step four, passing the I-beam through the installation hole and rotating the high-strength bolt into the sleeve to fix the I-beam with the shear wall, completing the installation of the load-bearing frame of the cantilevered scaffold.

[0005] Preferably, the wall thickness of the formwork is 3-5mm, and the large end of the formwork is open.

[0006] Preferably, the method of pouring concrete between the inner formwork and the composite thermal insulation layer is: S1, after pouring concrete to the bottom elevation of the embedded sleeve, pause pouring, and use two vibrating rods to symmetrically and synchronously vibrate on both sides of the embedded sleeve axis to make the concrete naturally flow flat and submerge the bottom of the sleeve, forming an initial solidification base; S2, pour the concrete in layers with a thickness not greater than 500 mm, and after pouring each layer, first vibrate synchronously around the embedded sleeve to make the concrete in this area liquefy before the concrete in the distant area; S3, before the initial setting of the concrete, re-measure the plan position and elevation of all embedded sleeves; based on the re-measured data, determine the displacement deviation vector of each embedded sleeve; in the lateral area on the opposite side of the vector, target the concrete wrapped around the sleeve to generate a correction force to drive the embedded sleeve to move towards the design position.

[0007] Preferably, in step S3, the target disturbance operation is performed in two stages in sequence: The first stage, the first-stage shallow disturbance, uses a vibrating rod to vibrate the surface layer of concrete in the area on the opposite side of the displacement vector for the first time, and the insertion depth of the first-time vibration is limited to the area above the center elevation of the embedded sleeve to promote the enrichment of the cement slurry to the inner port of the embedded sleeve, forming a viscous sealing layer; The second stage, the subsequent precise force transmission, after completing the first-stage shallow disturbance, performs the second-time vibration, and the insertion depth of the second-time vibration reaches the pipe wall of the embedded sleeve, and through the action of low-amplitude and continuous vibration, the correction force is directly transmitted to the embedded sleeve to guide its repositioning.

[0008] Preferably, when the composite thermal insulation layer is a thermal insulation integrated panel, the outer formwork in step two is composed of a wooden batten keel; the thermal insulation integrated panel serves as the outer panel during concrete pouring, and together with the wooden batten keel, it forms a composite support system, the large end of the formwork is detachably connected with a blocking plate, the blocking plate is detachably connected with the wooden batten keel, and the concrete is poured between the thermal insulation integrated panel and the inner formwork.

[0009] Preferably, when the composite thermal insulation layer is a thermal insulation panel combined with concrete, the outer formwork in step two is an outer formwork, the through hole is provided on the thermal insulation panel, the large end of the formwork is detachably connected with the outer formwork, and the small end of the formwork is located in the through hole and the end face of the small end is flush with the inner side of the thermal insulation panel; wherein, the embedded sleeve is located between the thermal insulation panel and the inner formwork, and the concrete is poured between the outer formwork and the thermal insulation panel and between the thermal insulation panel and the inner formwork to form a composite wall with the thermal insulation panel wrapped in the middle.

[0010] Preferably, when pouring concrete between the outer formwork and the thermal insulation panel, the pouring method for the area below and around the formwork is: An annular elastic vibration transmission sheet is clamped and fixed between the large end of the formwork and the outer formwork, the elastic vibration transmission sheet is made of butyronitrile rubber with a Shore hardness of 60-70 and has a thickness of 3-5 mm, the inner ring of the elastic vibration transmission sheet is in sealing contact with the outer wall of the large end of the formwork, and the outer ring is fixedly connected with the outer formwork to form a sealed vibration transmission node. A low-frequency vibrator is installed on the outer formwork corresponding to the position of each formwork, the vibration frequency of the low-frequency vibrator is set to 20-30 Hz, and the vibration direction is perpendicular to the plane of the outer formwork, wherein during the concrete pouring process, the low-frequency vibrator is first started, and the vibration is transmitted to the entire formwork through the elastic vibration transmission sheet, so that a radial vibration field is formed around the formwork.

[0011] Preferably, the outer formwork is provided with a plurality of exhaust holes at the position corresponding to each formwork, the plurality of exhaust holes are uniformly distributed along the circumference of the large end of the formwork, the diameter of the exhaust hole is 8-10 mm, and wherein during the concrete pouring process, the state of the slurry discharged from the exhaust hole is observed in real time, when the discharged slurry is bubble-free and continuous and uniform, a rubber plug is used to block the corresponding exhaust hole, and after the exhaust hole is blocked, the low-frequency vibrator continues to operate for 5-10 s.

[0012] Preferably, the vibration frequency of the low-frequency vibrator is divided into three stages: When the concrete is poured to 1 / 3 of the height of the large end of the formwork, the vibration frequency is set to 20 Hz; When the concrete is poured to 1 / 3-2 / 3 of the height of the large end of the formwork, the vibration frequency is increased to 25 Hz; When the concrete is poured to more than 2 / 3 of the height of the large end of the formwork, until the concrete liquid surface completely covers the formwork, and all exhaust holes continuously and stably discharge bubble-free slurry, the vibration frequency is increased to 30 Hz.

[0013] Preferably, after the formwork is removed in step three and before the I-beam is installed in step four, the protection treatment of the embedded sleeve is further included, and the protection treatment method is: The concrete slurry infiltrated into the embedded sleeve is removed, anticorrosive grease is coated on the inner wall of the embedded sleeve, and a plastic protective cap is screwed on the port of the embedded sleeve, and the outer diameter of the protective cap is greater than the outer diameter of the embedded sleeve.

[0014] The present application at least includes the following beneficial effects: Firstly, the application eliminates the damage to the thermal insulation layer and the concrete structure caused by later chiseling by setting through holes on the thermal insulation board or the thermal insulation integrated board and using a formwork to form mounting holes, thereby ensuring the thermal insulation and energy saving performance and structural safety of the building as a whole and fundamentally eliminating the heat bridge and leakage hidden dangers; the complex on-site chiseling work is converted into precise factory prefabrication and simple on-site installation, thereby simplifying the process, greatly improving the construction speed, shortening the construction period, greatly reducing the construction waste and construction dust, and meeting the environmental protection requirements of green construction; the pre-formed tapered hole inner wall is smooth and accurate in size, thereby providing a good support surface for the I-beam and facilitating subsequent sealing treatment.

[0015] Secondly, the construction method of the initial consolidation base can tightly combine the bottom of the embedded sleeve with the concrete, avoid the hollowing phenomenon, and greatly improve the connection stability and force transmission effect of the sleeve and the concrete. The layered pouring controls the thickness and preferentially vibrates the periphery of the sleeve, which can prevent concrete segregation, ensure the uniformity of the compactness of the concrete around the sleeve, and reduce the structural weak points. The re-measurement before initial setting and the targeted deviation correction can accurately correct the displacement deviation of the sleeve, avoid the misplacement of the scaffold installation caused by inaccurate positioning of the sleeve, and improve the installation quality of the scaffold support and the safety of the overall structure.

[0016] Thirdly, the viscous sealing layer formed by the early shallow disturbance can effectively block the penetration of the concrete slurry into the embedded sleeve, avoid the blockage of the sleeve affecting the subsequent installation of the high-strength bolt, and provide protection for the inner port of the sleeve. The low-amplitude vibration for accurate force transmission can smoothly drive the embedded sleeve to reset without damaging the surrounding poured concrete structure, thereby ensuring the positioning accuracy of the sleeve while maintaining the integrity of the concrete. The two-stage disturbance operation is closely linked, which corrects the deviation while improving the combined compactness of the sleeve and the concrete, enhances the stability of the force transmission, and provides a precise reference for the scaffold installation.

[0017] Other advantages, objects, and features of the application will be apparent from the following description, and will be appreciated by those skilled in the art. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 The state diagram of the thermal insulation board according to one of the technical solutions of the application; Fig. 2 The state diagram of the thermal insulation integrated board according to one of the technical solutions of the application. DETAILED DESCRIPTION

[0019] The application will be further described in detail below with reference to the embodiments, so that those skilled in the art can implement the application according to the description.

[0020] As Figs. 1-2As shown, the present application provides a basket type cantilevered scaffold construction method for composite thermal insulation, comprising the following steps: Step one, binding the wall steel bars and installing a composite thermal insulation layer outside the wall steel bars, the composite thermal insulation layer is provided with a plurality of through holes, and the composite thermal insulation layer is a thermal insulation integrated plate 8 or a thermal insulation plate 6 combined with a concrete layer 7; Step two, fixing a plurality of formworks 5 on the outside formwork, then installing the outside formwork outside the composite thermal insulation layer, the central axis of the formwork 5 is horizontally arranged, wherein the plurality of formworks 5 are arranged one-to-one corresponding to the plurality of through holes, the formwork 5 is a hollow quadrangular frustum, the taper is 1:10 and the small end is closed, so that the small end of the formwork 5 is located in the through hole, and the gap between the formwork 5 and the through hole is sealed to block the through hole, and the small end surface of the formwork 5 is flush with the inner surface of the composite thermal insulation layer; Step three, installing the shear wall 1 inner formwork 2 inside the wall steel bars, and arranging a plurality of embedded sleeves 4 between the inner formwork 2 and the composite thermal insulation layer, the plurality of embedded sleeves 4 correspond to the small ends of the plurality of formworks 5 and the sleeve ends contact the formworks 5, then pouring concrete between the inner formwork 2 and the composite thermal insulation layer, after the concrete strength reaches the specified requirement, the outside formwork, the inner formwork 2 and the formwork 5 are removed, forming an installation hole accommodating the end of the I-beam; Step four, passing the I-beam through the installation hole and rotating the sleeve through the high-strength bolt to fix the I-beam with the shear wall 1, completing the installation of the load-bearing frame of the cantilevered scaffold.

[0021] In the technical solution, when the composite thermal insulation layer is the thermal insulation integrated board 8, the through hole is arranged on the thermal insulation integrated board 8, and the size of the through hole is 1mm-2mm larger than the size of the formwork 5; when the composite thermal insulation layer is the thermal insulation board 6 combined with the concrete layer 7, the through hole is arranged on the thermal insulation board 6, and the size of the through hole is 1mm-2mm larger than the size of the small end of the formwork 5; the through hole is a hole reserved in the production process of the thermal insulation integrated board 8 or the thermal insulation board 6; when the wall steel bars are bound, the steel bars can be HRB400 threaded steel bars, which are bound into shapes by binding pliers, and the assembly positions are arranged in the preset areas of the wall according to the design drawings; the composite thermal insulation layer can be an extruded polystyrene board thermal insulation integrated board 8, a rock wool board thermal insulation integrated board 8, or an expanded perlite thermal insulation board 6 combined with the concrete layer 7; the number of through holes is determined according to the requirement of the support points of the scaffold, and each support point corresponds to one through hole; the formwork 5 is formed by polypropylene engineering plastic injection molding, the taper of the formwork 5 is strictly controlled to be 1:10, the inner and outer surfaces are smooth and free of burrs, which facilitates demolding; the large end of the formwork 5 is provided with an ear plate with a bolt hole, which is used for connecting with the outer side formwork; each through hole corresponds to one formwork 5, and when the formwork 5 is installed, the small end of the formwork 5 is inserted into the through hole, the gap can be sealed by polyurethane sealant, and the end surface of the small end is ensured to be flush with the inner surface of the composite thermal insulation layer; the outer side formwork can be the outer formwork 3 or the wooden square 10 keel frame, and the assembly position is on the outer side of the composite thermal insulation layer; each formwork 5 corresponds to a plurality of embedded sleeves 4, and the end of the sleeve is in close contact with the formwork 5; the large end of the formwork 5 is open, and the small end is closed, so that the formwork 5 can be stacked, which is convenient for folding and moving.

[0022] By using the technical solution, the present application forms the installation hole by arranging the through hole on the thermal insulation board 6 or the thermal insulation integrated board 8 and using the formwork 5, which eliminates the damage to the thermal insulation layer and the concrete structure caused by later chiseling, ensures the thermal insulation and energy saving performance and structural safety of the building as a whole, fundamentally eliminates the heat bridge and leakage hidden danger, converts the complex on-site chiseling work into precise factory prefabrication and simple on-site installation, simplifies the process, greatly improves the construction speed, shortens the construction period, greatly reduces the construction waste and construction dust, and meets the environmental protection requirements of green construction; the inner wall of the pre-formed tapered hole is smooth and accurate in size, which provides a good support surface for the I-beam and is also convenient for subsequent sealing treatment.

[0023] In another technical solution, the wall thickness of the formwork 5 is 3mm-5mm, and the large end of the formwork 5 is open; the wall thickness of the formwork 5 can be 3mm, 4mm or 5mm, which are all within the reasonable range of 3mm-5mm, and can meet the structural strength requirement in the construction process. By using the technical solution, the large end of the formwork 5 is open, and a plurality of formworks 5 can be stacked in sequence when moving or storing.

[0024] In another technical solution, the method for pouring concrete between the inner formwork 2 and the composite thermal insulation layer is as follows: S1, after the concrete is poured to the bottom elevation of the embedded sleeve 4, the pouring is paused, two vibrating rods are symmetrically and synchronously vibrated on both sides of the axis of the embedded sleeve 4, so that the concrete is naturally leveled and the bottom of the sleeve is submerged, and an initial consolidation base is formed; S2, the concrete is poured in layers with a thickness not greater than 500 mm, after each layer is poured, the surrounding area of the embedded sleeve 4 is vibrated synchronously first, so that the concrete in the area is liquefied before the concrete far away; S3, before the initial setting of the concrete, the planar position and elevation of all embedded sleeves 4 are re-measured, the displacement deviation vector of each embedded sleeve 4 is determined based on the re-measured data, and the concrete wrapped around the sleeve is targetedly disturbed in the lateral area on the side opposite to the vector to generate a correction force to drive the embedded sleeve 4 to move towards the designed position. Before pouring the concrete, the bottom elevation of the embedded sleeve 4 is marked by a level, and the work is paused when the liquid surface reaches the elevation during pouring. The vibrating rod can be a plug-in vibrating rod, two vibrating rods are arranged on both sides of the axis of the embedded sleeve 4 with a spacing of 300-500 mm, and the vibrating rods are symmetrically and synchronously started. The vibrating time can be 20-30 seconds, so that the concrete is naturally leveled and completely submerged at the bottom of the sleeve to form a dense initial consolidation base, and air pockets are avoided at the bottom of the sleeve. The thickness of the concrete poured in layers can be 300 mm, 400 mm or 500 mm, which is not greater than the limited value of 500 mm. After each layer is poured, the vibrating rods are synchronously vibrated in the area with a radius of 200-300 mm around the embedded sleeve 4, and the vibrating time can be 15-25 seconds, so that the concrete in the area is liquefied before the concrete far away, and then the whole pouring area is vibrated to ensure that the concrete around the sleeve is dense. Within 2-4 hours after the pouring of the concrete is completed (before the initial setting), the planar position and elevation of the embedded sleeve 4 are re-measured by a total station, the displacement data are recorded and the deviation vector is determined, and the targeted disturbance can be a small plug-in vibrating rod inserted into the concrete in the lateral area on the side opposite to the deviation vector with a depth of 100-200 mm and a vibrating frequency of 50-80 Hz to generate a correction force to drive the sleeve to move towards the designed position. By using the technical scheme, the construction method of the initial consolidation base of the application can tightly combine the bottom of the embedded sleeve 4 with the concrete to avoid air pockets and greatly improve the connection stability and force transmission effect of the sleeve and the concrete. The layer-by-layer pouring controls the thickness and preferentially vibrates the area around the sleeve to prevent concrete segregation, ensure the uniformity of the density of the concrete around the sleeve, and reduce the weak points of the structure. The re-measurement before the initial setting and the targeted correction can accurately correct the displacement deviation of the sleeve to avoid the mispositioning of the scaffold caused by inaccurate positioning of the sleeve, and improve the installation quality of the scaffold support and the safety of the overall structure.

[0025] In another technical scheme, the targeted disturbance operation in step S3 is performed in two stages in sequence: The first stage, the first-stage shallow disturbance, uses a vibrating rod to perform first-time vibration on the surface layer concrete in the area opposite to the displacement vector, and the insertion depth of the first-time vibration is limited to the area above the center elevation of the embedded sleeve 4, so as to cause the cement slurry to be enriched at the inner port of the embedded sleeve 4, and form a viscous sealing layer; The second stage, the subsequent precise force transmission, after the first-stage shallow disturbance is completed, the second-time vibration is performed, the insertion depth of the second-time vibration reaches the pipe wall of the embedded sleeve 4, and the deviation correction force is directly transmitted to the embedded sleeve 4 through the low-amplitude and continuous vibration effect, so as to guide the embedded sleeve 4 to reset. The first stage of the targeted disturbance is the first-stage shallow disturbance, the vibrating rod can be a small insertion type vibrating rod with a diameter of 30mm-50mm, the vibration area is the surface layer concrete in the direction opposite to the displacement vector, the insertion depth is strictly limited to the area above the center elevation of the embedded sleeve 4 (i.e. between the center of the sleeve and the surface of the concrete), the vibration time can be 10s-15s, so as to cause the cement slurry to be enriched at the inner port of the embedded sleeve 4, and form a viscous sealing layer with a thickness of 2mm-5mm. The second stage is the subsequent precise force transmission, which is immediately performed after the shallow disturbance is completed, the insertion depth of the vibrating rod is adjusted to reach the pipe wall of the embedded sleeve 4, the distance between the insertion position and the outer wall of the sleeve can be 50mm-100mm, the vibration adopts a low-amplitude mode, the amplitude can be 0.5mm-1mm, the continuous vibration time can be 15s-20s, and the vibration effect is directly transmitted to the embedded sleeve 4 through the vibration force, so as to guide the embedded sleeve 4 to reset to the designed position. By adopting the technical scheme, the viscous sealing layer formed by the first-stage shallow disturbance can effectively block the penetration of the concrete slurry into the inside of the embedded sleeve 4, avoid the blockage of the sleeve to affect the subsequent installation of the high-strength bolt, and provide protection for the inner port of the sleeve. The low-amplitude vibration of the subsequent precise force transmission can smoothly drive the embedded sleeve 4 to reset, and will not damage the surrounding poured concrete structure, so as to ensure the positioning accuracy of the sleeve and maintain the integrity of the concrete. The two-stage disturbance operation is closely connected, the deviation is corrected, and the combination density of the sleeve and the concrete is improved, the stability of the force transmission is enhanced, and a precise reference is provided for the installation of the scaffold.

[0026] In another technical solution, when the composite thermal insulation layer is the thermal insulation integrated board 8, the outer side formwork in step two is composed of the wooden square 10 keel; the thermal insulation integrated board 8 serves as the outer side panel during concrete pouring and forms a composite support system together with the wooden square 10 keel, the large end of the formwork 5 is detachably connected with the blocking plate 9, the blocking plate 9 is detachably connected with the wooden square 10 keel, and the concrete is poured between the thermal insulation integrated board 8 and the inner formwork 2. The wooden square 10 keel can be made of pine or cedar wood, and the cross-sectional size can be 50mm*100mm or 60mm*120mm. The thermal insulation integrated board 8 serves as the outer side panel during concrete pouring and forms a composite support system together with the wooden square 10 keel. The large end of the formwork 5 is detachably connected with the blocking plate 9, the blocking plate 9 can be a plywood or a thin steel plate, and the thickness can be 8mm-12mm. The blocking plate 9 and the large end of the formwork 5 can be connected by self-tapping screws or buckles. The blocking plate 9 and the wooden square 10 keel are also detachably connected (such as fixed by screws or bound by a strap), which ensures that the position of the formwork 5 is fixed during pouring and is easy to remove later. The concrete is poured between the thermal insulation integrated board 8 and the inner formwork 2. By using this technical solution, the detachable design of the blocking plate 9 of the present application not only ensures the stability of the installation of the formwork 5 and prevents the formwork 5 from shifting during pouring, but also protects the thermal insulation integrated board 8 and the formwork 5 from being damaged during removal, thereby maintaining the integrity of the thermal insulation performance of the wall.

[0027] In another technical solution, when the composite thermal insulation layer is the thermal insulation board 6 combined with concrete, the outer side formwork in step two is the outer formwork 3, the through hole is provided on the thermal insulation board 6, the large end of the formwork 5 is detachably connected with the outer formwork 3, and the small end of the formwork 5 is located in the through hole and the end face of the small end is flush with the inner side of the thermal insulation board 6. The pre-buried sleeve 4 is located between the thermal insulation board 6 and the inner formwork 2, and the concrete is poured between the outer formwork and the thermal insulation board 6 and between the thermal insulation board 6 and the inner formwork 2, thereby forming a composite wall with the thermal insulation board 6 wrapped in the middle. The through hole is pre-provided on the thermal insulation board 6, the hole diameter is 1mm-2mm larger than the outer diameter of the small end of the formwork 5, the large end of the formwork 5 is detachably connected with the outer formwork 3 by bolts or buckles, the small end is inserted into the through hole, the end face of the small end is flush with the inner side of the thermal insulation board 6, and the gap is sealed with sealant. The pre-buried sleeve 4 is located between the thermal insulation board 6 and the inner formwork 2, and each formwork 5 corresponds to multiple pre-buried sleeves 4. The distance between the thermal insulation board 6 and the inner formwork 2 and the distance between the outer formwork 3 and the thermal insulation board 6 are set according to the construction requirements. By using this technical solution, the composite wall of the present application completely wraps the thermal insulation board 6, which can effectively prevent the erosion of the external environment on the thermal insulation board 6, prolong the service life of the thermal insulation layer, and improve the impermeability and structural stability of the wall.

[0028] In another technical solution, when the concrete is poured between the outer formwork and the thermal insulation board 6, the pouring method for the area below and around the formwork 5 is as follows: An annular elastic vibration transmission sheet is clamped and fixed between the large end of the formwork 5 and the outer formwork, the elastic vibration transmission sheet is made of nitrile rubber with a Shore hardness of 60-70, the thickness is 3-5mm, the inner ring of the elastic vibration transmission sheet is sealed and fitted with the outer wall of the large end of the formwork 5, and the outer ring is fixedly connected with the outer formwork to form a sealed vibration transmission node; During the pouring of the concrete between the outer formwork and the insulation board 6, the annular elastic vibration transmission sheet is clamped between the large end of the formwork 5 and the outer formwork, the elastic vibration transmission sheet can be made of nitrile rubber with a Shore hardness of 60, 65 or 70, the thickness can be 3mm, 4mm or 5mm, the inner ring diameter is consistent with the diameter of the outer wall of the large end of the formwork 5, and the outer ring is fixedly connected with the outer formwork through screws or pressing strips to form a sealed vibration transmission node, so that the concrete slurry is prevented from leaking, the low-frequency vibrator is installed on the outer formwork corresponding to the position of each formwork 5, the low-frequency vibrator can be an attached low-frequency vibrator, the installation position is on the outer formwork corresponding to the center of the formwork 5, the vibration frequency is set to 20Hz, 25Hz or 30Hz, the vibration direction is perpendicular to the plane of the outer formwork, and the vibrator is fixed with the outer formwork through bolts to avoid displacement during vibration. By adopting the technical scheme, the elastic vibration transmission sheet made of nitrile rubber can not only prevent the concrete slurry from leaking from the gap between the formwork 5 and the outer formwork 3 into the formwork 5, but also efficiently transmit vibration energy to ensure that the vibration covers all areas around the formwork 5. The directional vibration of the low-frequency vibrator can uniformly liquefy the concrete around the formwork 5, reduce air bubbles and pores, and improve the compactness of the concrete and the bonding force with the formwork 5 and the insulation board 6. The formation of the radial vibration field avoids the problem that local vibration is not in place, ensures that the concrete quality around the hole is consistent, and provides a flat and firm support surface for subsequent installation of the I-beam.

[0029] In another technical solution, the outer template is provided with a plurality of exhaust holes at the position corresponding to each formwork 5, the plurality of exhaust holes are uniformly distributed along the circumference of the large end of the formwork 5, and the diameter of the exhaust hole is 8-10 mm. In the concrete pouring process, the state of the slurry discharged from the exhaust hole is observed in real time. When the discharged slurry is bubble-free and continuous and uniform, the corresponding exhaust hole is plugged with a rubber plug. After the exhaust hole is plugged, the low-frequency vibrator continues to operate for 5-10 s. The number of exhaust holes can be 4, 6 or 8, which are uniformly distributed along the circumference of the large end of the formwork 5, the adjacent exhaust holes have equal angles, the diameter of the exhaust hole can be 8 mm, 9 mm or 10 mm, and the distance between the drilling position and the edge of the large end of the formwork 5 can be 20-30 mm, which facilitates the discharge of air in the peripheral concrete of the formwork 5. During the concrete pouring process, a person is arranged to observe the state of the slurry discharged from each exhaust hole in real time. When the discharged slurry is bubble-free and continuous and uniform, the corresponding exhaust hole is immediately plugged with a rubber plug. The diameter of the rubber plug is 1-2 mm larger than that of the exhaust hole, which ensures that the plugging is tight and prevents air from entering or slurry from leaking. After the exhaust hole is plugged, the low-frequency vibrator continues to operate for 5 s, 8 s or 10 s, which further promotes the compaction of the peripheral concrete of the formwork 5 and discharges the residual small bubbles. By using this technical solution, the circumferentially uniformly distributed exhaust holes of the present application can discharge the air in the peripheral concrete of the formwork 5, avoid the formation of air pockets and voids due to air retention, and improve the quality of concrete pouring. The vibrator operates for a longer time after plugging, which can further discharge the residual small bubbles and make the concrete more compact.

[0030] In another technical solution, the vibration frequency of the low-frequency vibrator is divided into three stages: When the concrete is poured to 1 / 3 of the height of the large end of the formwork 5, the vibration frequency is set to 20 Hz. At this stage, the pouring height is low, and the lower vibration frequency can avoid the splashing of concrete slurry due to excessive vibration, and also preliminarily discharge the shallow air; When the concrete is poured to 1 / 3-2 / 3 of the height of the large end of the formwork 5, the vibration frequency is increased to 25 Hz. With the increase of the pouring height, appropriately increasing the vibration frequency can enhance the liquidization effect of the concrete, discharge the intermediate air and ensure the compaction of the concrete in this area; When the concrete is poured to more than 2 / 3 of the large end height of the formwork 5, until the concrete liquid completely covers the formwork 5, and all the exhaust holes continuously and stably exhaust the bubble-free slurry, the vibration frequency is increased to 30 Hz; the high-frequency vibration can completely exhaust the deep air and the tiny bubbles, and the frequency adjustment of the three stages can adapt to the exhaust requirements of different pouring heights; the central axis of the formwork 5 is horizontal, the formwork 5 is large at one end and small at the other end, and the height of the large end of the formwork 5 in the vertical direction is taken as the benchmark to divide into three stages. By adopting the technical scheme, the present application adjusts the vibration frequency in stages to adapt to the requirements of different pouring heights of the concrete, and ensures that the concrete around the formwork 5 is dense and uniform from the surface layer to the deep layer. The gradual frequency adjustment not only ensures the exhaust effect, but also maintains the integrity of the concrete, avoids the segregation phenomenon, and significantly improves the forming precision of the installation hole and the mechanical properties of the concrete.

[0031] In another technical scheme, after the formwork 5 is removed in step three and before the I-beam is installed in step four, the protective treatment of the embedded sleeve 4 is further included, and the protective treatment method is: The concrete slurry infiltrated in the embedded sleeve 4 is removed, the anti-corrosion grease is coated on the inner wall of the embedded sleeve 4, and the plastic protective cap is screwed on the port of the embedded sleeve 4, the outer diameter of the protective cap is larger than the outer diameter of the embedded sleeve 4; the cleaning tool can be a steel wire brush, a high-pressure air gun or a small scraper; the anti-corrosion grease can be lithium-based or calcium-based; the coating method can be spraying, which ensures that the inner wall is uniformly covered with a layer of grease, and the thickness of the grease can be 0.5-1 mm, which plays a role of corrosion protection and lubrication; the plastic protective cap can be made of polyethylene or polypropylene, the inner thread of the protective cap is matched with the outer thread of the sleeve port, and the outer diameter of the protective cap is 5-10 mm larger than the outer diameter of the embedded sleeve 4, which can completely cover the sleeve port, the protective treatment can prevent the rusting of the inner wall of the sleeve and the entry of sundries, and protect the internal structure of the sleeve. By adopting the technical scheme, the cleaning of the inner wall of the sleeve can remove the residual concrete slurry, avoid the influence of impurities on the connection precision and fastening property of the high-strength bolt and the sleeve, and ensure the installation quality of the scaffold support frame. The coating of the anti-corrosion grease can isolate air and moisture, prevent the rusting of the inner wall of the sleeve, prolong the service life of the sleeve, and play a lubricating role, which facilitates the rotation and installation of the high-strength bolt. The plastic protective cap can completely block the sundries, dust and moisture in the construction process from entering the sleeve, keep the inside of the sleeve clean and unobstructed, create good conditions for the later I-beam installation, and avoid affecting the construction progress and structural safety due to the damage or blockage of the sleeve.

[0032] Although the embodiments of the present application have been disclosed as above, they are not limited to the application and implementation listed in the specification and embodiments, and can be fully applied to various fields suitable for the present application, and additional modifications can be easily realized by those skilled in the art, therefore the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A construction method for a basket-type cantilever scaffold used for composite insulation, characterized in that, Includes the following steps: Step 1: Tie the wall reinforcement bars and install the composite insulation layer on the outside of the wall reinforcement bars. The composite insulation layer has multiple through holes. The composite insulation layer is an integrated insulation board or an insulation board combined with the concrete layer. Step 2: Fix multiple mold shells onto the outer mold frame, and then install the outer mold frame on the outside of the composite insulation layer. The central axis of the mold shells is set horizontally. Multiple mold shells are set one-to-one with multiple through holes. The mold shell is a hollow quadrangular truncated pyramid with a taper of 1:10 and a closed small end, so that the small end of the mold shell is located in the through hole. Seal the gap between the mold shell and the through hole to block the through hole. The end face of the small end of the mold shell is flush with the inner surface of the composite insulation layer. Step 3: Install the inner formwork of the shear wall inside the wall reinforcement, and set up multiple embedded sleeves between the inner formwork and the composite insulation layer. The multiple embedded sleeves correspond to the small ends of multiple formwork shells and the ends of the sleeves are in contact with the formwork shells. Then, pour concrete between the inner formwork and the composite insulation layer. After the concrete strength reaches the specified requirements, remove the outer formwork, inner formwork and formwork shell to form an installation hole to accommodate the end of the I-beam. Step 4: Pass the I-beam through the installation hole and screw the high-strength bolts into the sleeve to fix the I-beam to the shear wall, thus completing the installation of the load-bearing frame of the cantilever scaffold.

2. The construction method of the basket-type cantilever scaffolding for composite insulation as described in claim 1, characterized in that, The mold shell has a wall thickness of 3mm-5mm, and the large end of the mold shell is open.

3. The construction method of the basket-type cantilever scaffolding for composite insulation as described in claim 2, characterized in that, The method for pouring concrete between the inner formwork and the composite insulation layer is as follows: S1. After the concrete is poured to the bottom elevation of the embedded sleeve, the pouring is paused. Two vibrators are used to vibrate symmetrically and synchronously on both sides of the embedded sleeve axis to allow the concrete to flow naturally and submerge the bottom of the sleeve, forming an initial consolidation base. S2. Pour concrete in layers with a thickness not exceeding 500mm. After each layer is poured, vibrate it simultaneously in the area around the pre-embedded sleeve so that the concrete in that area liquefies fully before the concrete in the distance. S3. Before the concrete initially sets, re-measure the plane position and elevation of all embedded sleeves. Based on the retest data, the displacement deviation vector of each pre-embedded sleeve is determined; in the lateral region where the opposite direction of the vector is located, the concrete surrounding the sleeve is targeted to generate a corrective force, driving the pre-embedded sleeve to move toward the design position.

4. The construction method of the basket-type cantilever scaffolding for composite insulation as described in claim 3, characterized in that, In step S3, the targeted perturbation operation is performed in two phases sequentially: In the first stage, shallow disturbance is carried out using a vibrator to vibrate the surface concrete in the area opposite to the displacement vector. The insertion depth of the first vibration is limited to the area above the center elevation of the pre-embedded sleeve, so as to promote the accumulation of cement slurry at the inner end of the pre-embedded sleeve and form a viscous sealing layer. In the second stage, subsequent precise force transmission, after the initial shallow disturbance is completed, a second round of vibration is carried out. The insertion depth of the second round of vibration reaches the wall of the pre-embedded sleeve. Through low amplitude and continuous vibration, the correction force is directly transmitted to the pre-embedded sleeve to guide it to reset.

5. The construction method of the basket-type cantilever scaffolding for composite insulation as described in claim 4, characterized in that, When the composite insulation layer is an integrated insulation board, the outer formwork in step two is made of wooden keel; the integrated insulation board serves as the outer panel during concrete pouring, and together with the wooden keel, they form a composite support system. The large end of the formwork is detachably connected to a sealing plate, which is detachably connected to the wooden keel. Concrete is poured between the integrated insulation board and the inner formwork.

6. The construction method of the basket-type cantilever scaffolding for composite insulation as described in claim 4, characterized in that, When the composite insulation layer is a combination of insulation board and concrete, the outer formwork in step two is the outer template, with through holes on the insulation board. The large end of the template is detachably connected to the outer template, and the small end of the template is located inside the through hole, with the small end face flush with the inner side of the insulation board. Meanwhile, the pre-embedded sleeve is located between the insulation board and the inner template. Concrete is poured simultaneously between the outer template and the insulation board, and between the insulation board and the inner template, forming a composite wall that wraps the insulation board in the middle.

7. The construction method of the basket-type cantilever scaffolding for composite insulation as described in claim 6, characterized in that, When pouring concrete between the outer formwork and the insulation board, the pouring method for the area below and around the formwork is as follows: An annular elastic vibration transmission plate is clamped and fixed between the large end of the mold shell and the outer template. The elastic vibration transmission plate is made of nitrile rubber with a Shore hardness of 60-70 and a thickness of 3-5mm. The inner ring of the elastic vibration transmission plate is sealed and fitted to the outer wall of the large end of the mold shell, and the outer ring is fixedly connected to the outer template to form a sealed vibration transmission node. On the outer template, a low-frequency vibrator is installed at the position of each mold shell. The vibration frequency of the low-frequency vibrator is set to 20-30Hz, and its vibration direction is perpendicular to the plane of the outer template. During the concrete pouring process, the low-frequency vibrator is started first, and its vibration is transmitted to the entire mold shell through the elastic vibration plate, so that a radial vibration field is formed around the mold shell.

8. The construction method of the basket-type cantilever scaffolding for composite insulation as described in claim 7, characterized in that, Multiple vent holes are set at the corresponding positions of each mold shell on the outer template. The multiple vent holes are evenly distributed along the circumference of the large end of the mold shell. The diameter of the vent holes is 8-10mm. During the concrete pouring process, the discharge state of the vent holes is observed in real time. When the discharged slurry is free of air bubbles and is continuous and uniform, the corresponding vent holes are sealed with rubber plugs. After the vent holes are sealed, the low-frequency vibrator continues to run for 5-10 seconds.

9. The construction method of the basket-type cantilever scaffolding for composite insulation as described in claim 8, characterized in that, The vibration frequency of the low-frequency vibrator is divided into three stages: When the concrete is poured to 1 / 3 of the height of the large end of the formwork, the vibration frequency is set to 20Hz. When the concrete is poured to 1 / 3 to 2 / 3 of the height of the large end of the formwork, the vibration frequency increases to 25Hz. When the concrete is poured to more than 2 / 3 of the height of the large end of the formwork, until the concrete surface completely covers the formwork and all vents continuously and stably discharge bubble-free slurry, the vibration frequency increases to 30Hz.

10. The construction method of the basket-type cantilever scaffold for composite insulation as described in claim 1, characterized in that, After removing the formwork in step three and before installing the I-beam in step four, protective measures are also taken for the embedded sleeves. The protective measures are as follows: Remove any concrete slurry that has seeped into the embedded sleeve, apply anti-corrosion grease to the inner wall of the embedded sleeve, and screw on a plastic protective cap at its end. The outer diameter of the protective cap should be larger than the outer diameter of the embedded sleeve.

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