Integrated construction method for formwork layer, heat preservation layer and leveling layer of outer wall of high-rise housing

Abstract

The invention provides an integrated construction method for a formwork layer, a heat preservation layer and a leveling layer of an outer wall of a high-rise housing. The integrated construction method comprises the following steps that S1, a prefabricated countersunk head nail hole plastering-free composite disassembly-free heat preservation formwork is adopted to replace a traditional outer formwork; s2, the countersunk head nail hole plastering-free composite disassembly-free heat preservation formwork is prefabricated and produced in a factory; s3, modeling is conducted, and the specification and number of the composite non-dismantling heat preservation formworks are determined; s4, construction preparation; s5, snapping a line; s6, the composite non-dismantling heat preservation formwork is installed according to the BIM typesetting scheme; s7, anchoring parts are installed; s8, the abutted seam is subjected to strengthening treatment; s9, internal and external corners of the composite non-dismantling heat preservation formwork are reinforced through an aluminum formwork system; s10, erecting an inner side aluminum mold; s11, concrete is poured; s12, the formwork is dismantled; and S13, the screw hole is blocked. The formwork, the heat preservation plate and the plastering mortar leveling layer are constructed at a time on the construction site, the situation that a rear anchoring part sleeve anchor disc protrudes out of the dismantling-free heat preservation formwork leveling layer can be avoided, the situation that a mortar plastering through leveling procedure is additionally conducted before an outer wall serves as a coating facing face is avoided, and the trouble that an outer vertical face falls off due to the fact that a plastering layer is too thick is avoided; and meanwhile, the operation is convenient, the field construction efficiency is greatly improved, the operation time of a high-altitude hanging basket is shortened, the potential safety hazard is reduced, and the labor cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building energy conservation, and in particular to an integrated construction method for a formwork layer, a thermal insulation layer and a leveling layer of an exterior wall of a high-rise residential building. Background Art

[0002] With the continuous improvement of energy-saving standards, most current building energy-saving projects use external wall insulation technology. This technology refers to adding insulation materials to the exterior of the building structure and applying decorative materials such as leveling layers and exterior wall paints on the exterior. However, traditional external wall insulation technology has problems such as complex construction process, short warranty period, and easy to be blown away by strong winds. In addition, fire accidents caused by material problems also occur from time to time.

[0003] In recent years, with the gradual promotion and application of new template insulation structure integrated materials, this material closely combines the template with the insulation function, and can be completed in one construction, ensuring the durability and stability of the exterior wall insulation system. This material connects the insulation board and the steel bar through prefabricated anchors, and is integrated with the cast-in-place concrete, ensuring that the insulation system matches the main structure in terms of service life, but this material requires additional installation of prefabricated anchors and cast-in-place concrete during construction. Although this method can ensure the integrity and durability of the integrated insulation structure, some problems may be encountered during the construction process. The anchor plate of the prefabricated anchor protrudes outside the integrated insulation structure material and needs to be covered by a subsequent leveling mortar layer. The integrated insulation structure material already has a mortar leveling layer. If another layer of mortar leveling layer is made, the exterior wall is at risk of cracking and falling off. At the same time, the project construction period is tight. How to ensure the quality of the exterior wall construction while ensuring that the exterior wall construction is completed on schedule is the current problem.

[0004] Similar technical solutions are also used in my country. For example, in some projects, the circular anchor plate is completely hammered into the surface layer by reducing the number of anchors. However, the disadvantage of this method is that it is not only time-consuming and labor-intensive, but also may damage the surface of the insulation board, and it cannot avoid the problem of mortar leveling and plastering. In addition, this method is not suitable for high-rise and coastal residential buildings. Therefore, there is an urgent need to find more effective methods to solve these problems. Summary of the invention

[0005] In order to solve the above problems, the present invention discloses an integrated construction method for the formwork layer, insulation layer and leveling layer of the exterior wall of a high-rise residential building. On the one hand, the formwork, insulation board and plaster mortar leveling layer can be constructed at one time on the construction site, and the construction speed is fast. On the other hand, the excessive thickness of the exterior wall leveling layer can be avoided, and the risk of cracking and falling off of the exterior wall can be reduced, thereby ensuring the quality of the exterior wall construction while ensuring that the exterior wall construction is completed on schedule, thereby ensuring safety to the greatest extent.

[0006] The specific plan is as follows:

[0007] An integrated construction method for a high-rise residential exterior wall formwork layer, a thermal insulation layer and a leveling layer comprises the following steps:

[0008] S1. Innovative use of composite non-dismantling insulation formwork factory prefabricated countersunk nail hole non-plastering technology to replace the traditional exterior wall insulation and leveling layer construction, replace the traditional exterior formwork, and at the same time enhance the flexural strength of the composite non-dismantling insulation formwork;

[0009] S2. A production method for prefabricating and preparing a plaster-free composite non-disassembly insulation formwork with prefabricated countersunk holes in a factory, and punching countersunk nail holes;

[0010] S3. When laying out, make the composite non-removable insulation formwork 50mm higher than the structural floor to prevent contamination during concrete pouring. At the same time, reserve enough gap width space during layout to prevent excessive shaking of the installed panels during installation;

[0011] S4. Prepare the necessary construction materials and encode the composite non-disassembly insulation formwork for quick identification and use on site;

[0012] S5, construction method of popping out the control line;

[0013] S6. Install the composite non-removable insulation formwork according to the BIM layout plan, and use binding wire to tie the connectors and steel bars to prevent them from tilting. Install the exterior wall corner panels first, then the main wall panels. Use hooks to connect the two. 14 The steel bars are tightened to reduce the gaps in the joints. When each layer of the composite non-disassembly insulation formwork is erected, an aluminum formwork K plate is provided on the lower layer to clamp and wrap the lower horizontal seam of the composite non-disassembly insulation formwork to prevent dislocation;

[0014] S7. Install anchors. Pre-installed anchors must be installed tightly without gaps. The plastic expansion sleeve anchor plate must be embedded in the countersunk hole. The anchor plate must be flush with the leveling layer of the composite non-disassembly insulation board.

[0015] S8. Strengthen the joints. Cement support strips are densely installed on both sides of the inner side of the joints. Cement supports are placed in place at the corners, horizontal and vertical joints. Double rows of cement supports are placed on the top. The wooden squares are placed flat at the outer joints.

[0016] S9. The composite non-dismantling insulation formwork uses an aluminum mold system to reinforce the inner and outer corners. Before reinforcement, a line is drawn to ensure the flatness and verticality of the board surface. First, use BIM to deepen the reinforcement system, and then use the matching aluminum mold of the inner wall specification to reinforce the external composite non-dismantling insulation formwork. The aluminum mold at the composite non-dismantling insulation board position uses the inner corner template, and the aluminum mold at the outer corner position overlaps 150mm. The aluminum mold at the local position is vertically tied to completely cover the vertical gap to ensure the quality of the external insulation molding and avoid misalignment. The outer side is configured with a back rib according to the aluminum mold system, combined with 40×70mm wooden squares and steel secondary ribs (the spacing between wooden squares and steel secondary ribs is 150mm) to ensure that the external wall composite insulation formwork is square, and the bottom of the composite non-dismantling insulation formwork is clamped with an aluminum mold K plate;

[0017] S10, erect the inner aluminum formwork. The inner aluminum formwork is pre-installed with trapezoidal threaded screws before installation. Because the outer side is a composite non-disassembly insulation formwork, the screw holes of the aluminum formwork need to be slightly enlarged. The screw holes of the aluminum formwork are opened in advance in the factory. 22mm hole, PVC sleeve inserted and fixed with T18 trapezoidal screw and tension screw;

[0018] S11. Before pouring concrete, use a cover plate to protect the composite non-removal insulation formwork. When vibrating the concrete, the vibrating rod must not directly contact the composite non-removal insulation formwork;

[0019] S12, template removal;

[0020] S13, Screw hole sealing, use the independently developed pipe pusher to seal the joints, and then waterproof the joints.

[0021] The beneficial effects of the present invention are that the formwork, insulation board, and plastering mortar leveling layer are constructed at the construction site at one time, which can avoid the post-installed anchor sleeve anchor plate protruding outside the non-disassembly insulation formwork leveling layer, avoid adding a mortar plastering leveling process before the exterior wall is painted, and avoid the trouble of the exterior facade falling off due to the excessive thickness of the plastering layer, thereby effectively avoiding the cost of exterior wall repair in the later stage. At the same time, it is easy to operate, greatly improves the on-site construction efficiency, reduces the operation time of the high-altitude hanging basket, reduces safety hazards, and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a detailed schematic diagram of the BIM of the composite non-disassembly insulation formwork in the present invention.

[0023] Figure 2 For the present invention Schematic diagram of the steel bar tensioning connection of 14.

[0024] Figure 3 The figure is a schematic diagram of sticking sponge strips around the window in the present invention.

[0025] Figure 4 It is a schematic diagram of the wooden squares being laid flat at the joints in the present invention.

[0026] Figure 5 Detailed diagram of aluminum formwork for composite non-disassembly insulation formwork Figure 1 .

[0027] Figure 6 A detailed schematic diagram of the composite non-disassembly insulation template aluminum mold in the present invention Figure 2 .

[0028] Figure 7 This is a photo 1 of the prefabricated countersunk nail hole in the present invention.

[0029] Figure 8 This is the second photo of the prefabricated countersunk nail hole in the present invention.

[0030] Fig. 9 It is a schematic diagram of the non-vertical male corner expansion mold in the present invention.

[0031] Fig.10 This is a schematic diagram of using bolts to pull the external corners in the present invention. DETAILED DESCRIPTION

[0032] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0033] At present, although new insulation materials such as integrated insulation structures have been widely used, in order to ensure their overall strength, they all need to be prefabricated in the factory for leveling mortar layers. At the same time, in order to make the integrated insulation structure materials and cast-in-place concrete one, the existing technology must install prefabricated anchors. The prefabricated anchor plate protrudes from the prefabricated leveling mortar layer, which has an anchoring effect on the integrated materials. In addition, according to the existing technology, the exterior walls of high-rise residential buildings may have a vertical flatness error of 3-6CM from bottom to top, and the errors in the upper and lower and left and right joints of the integrated insulation board surface, the prefabricated anchor plate protrudes high and low on the outside, and the surface is uneven. Before the exterior wall is painted, a layer of hanging mesh is needed for mortar leveling. Under the condition of tight construction period, the construction cannot be completed as scheduled. If the plaster mortar is too thick, the exterior wall is at risk of cracking and falling off.

[0034] In addition, in order to avoid the problem of anchors protruding outside the prefabricated leveling mortar layer, a few construction units will adopt the method of forcibly hammering the circular anchor plate completely into the integrated surface layer of the thermal insulation structure after the prefabricated connecting anchor is installed. When the new integrated thermal insulation structure material is prefabricated in the factory, the mesh cloth used for the leveling plaster mortar surface layer and the thermal insulation material have formed a whole. Forcibly hammering the anchors on site may destroy the integrity of the composite formwork material, thereby reducing its bending resistance. At the same time, the surface leveling layer of the integrated thermal insulation structure is strong, so the number of anchors should be appropriately reduced to avoid damage to the entire plate. This will cause the prefabricated self-insulating formwork to be unreliably fixed to the concrete wall, posing a safety risk.

[0035] Therefore, the present invention provides a construction method suitable for integrating the external wall formwork, insulation layer and leveling layer of a high-rise residential building. The method can complete the external wall formwork, insulation layer and mortar leveling layer of a high-rise residential building in one step, saving the time of later insulation board pasting and mortar leveling construction; there is no external formwork, reducing the formwork cost; the construction speed is fast, and in addition, this method avoids the external wall leveling layer from being too thick, reducing the risk of cracking and falling off of the external wall. Specifically, the following steps are included:

[0036] Step 1. Use prefabricated countersunk hole plaster-free composite non-removal insulation formwork to replace the traditional external formwork. The prefabricated countersunk hole plaster-free composite non-removal insulation formwork is composed of a panel layer and a composite insulation layer, and then it is fixed to the wall by riveting and bonding as an external wall insulation system. The countersunk holes are prefabricated in the factory. The depth of the countersunk holes is slightly larger than the depth of the anchor plate, which is convenient for the anchor plate to be set in the countersunk holes, so that the anchor plate is flush with the leveling layer of the composite non-removal insulation board. The external wall only needs to be partially leveled to complete the straightening.

[0037] Step 2. Factory prefabrication of countersunk nail hole plaster-free composite insulation formwork

[0038] The plaster-free composite non-disassembly insulation formwork with prefabricated countersunk holes is pre-produced and prepared in the factory. The flexural strength of the composite non-disassembly insulation formwork will be reduced after the countersunk holes are punched in the surface layer. Therefore, it is necessary to ensure that the bending resistance of the mortar leveling layer is not reduced after the countersunk holes, and no warping occurs, to ensure the quality of the composite non-disassembly insulation formwork, to ensure the flatness and verticality of the board surface, and to be able to withstand severe external weather (such as thunderstorms and strong winds) and have a certain impact resistance.

[0039] (1) Through experiments, a formula for the mortar leveling layer of the composite non-disassembly insulation formwork was designed, and two layers of fiberglass mesh were added to ensure that the bending strength of the composite non-disassembly insulation formwork is not reduced after the countersunk holes are prefabricated, and no warping occurs, thereby ensuring the quality of the composite non-disassembly insulation formwork, and being able to withstand severe external weather (such as thunderstorms and strong winds) and having a certain impact resistance.

[0040] The formula of mortar leveling layer board is as follows:

[0041]

[0042] (2) After mixing 5 mm thick mortar with polymer compounds, silicate mineral aggregates, gelling agents and fibers, spread it on the extruded board coated with reinforcing interface agent, and lay alkali-resistant glass fiber mesh at the same time, and place it on a curing rack for curing and drying.

[0043] (3) The single-sided mortar-coated extruded board that has met the above-mentioned curing requirements is turned over and sent to the production line to start the polystyrene particle mortar paving and the surface mortar paving. The wet material is filled into the back of the extruded board coated with the reinforcing interface agent and dried.

[0044] 1) Spread the polystyrene granular mortar on the other side of the extruded board (which has been coated with interface agent).

[0045] 2) At the same time, cover the first side with glass fiber mesh, and use a pressure roller to flatten the glass fiber mesh and the polystyrene particle mortar to tightly combine them.

[0046] 3) Spread 3mm mortar on the upper layer of the first layer of fiberglass mesh.

[0047] 4) Apply a second layer of fiberglass mesh and spread 4-5mm surface mortar at the same time.

[0048] 5) Enter the maintenance rack for maintenance.

[0049] (4) Finished product curing: curing with natural ventilation on the curing rack, curing temperature above 5°C, curing for 5-6 days in summer, heating curing in winter, room temperature above 10°C, curing for 8-10 days. The compressive and tensile strengths must reach 75% or more to meet the curing standards;

[0050] (5) Cut the finished product, pre-drill the countersunk holes and nail holes, the depth of the countersunk head of the countersunk hole is 5-7mm, the anchor plate is fixed in the countersunk head, and the center of the countersunk hole is provided with a through nail hole, and the number of countersunk nail holes is 4-5 per square meter. Cut different sizes according to requirements, punch holes automatically, sort and stack, and then conduct quality inspection on thickness, length and width. After meeting the factory requirements, mark and pack them for storage.

[0051] Step 3. Modeling, determining the specifications and quantity of the composite non-disassembly insulation formwork:

[0052] Only through 3D modeling can the exact quantity and position of the composite non-removal insulation formwork for the exterior wall of a high-rise residential building be confirmed, factory pre-processing be achieved, and the construction period be guaranteed. The factory cuts the panels into blocks and encodes them according to the 3D layout of the composite non-removal insulation formwork, and then transports them to the construction site for installation. This avoids low on-site cutting precision, reduces material loss, reduces dust, and saves construction costs. Therefore, BIM software with 3D modeling should be selected to complete the in-depth confirmation work.

[0053] Modeling software is selected, and Revit 3D modeling software is used to determine the layout and division plan according to the exterior wall size, and try to use the main specification of composite non-disassembly insulation template for layout.

[0054] In order to ensure the construction quality of the composite non-disassembly insulation formwork and avoid leakage and overflow at the floor slab position, when using 3D modeling software for layout, the composite non-disassembly insulation formwork is 50mm higher than the structural floor. Therefore, the layout height of the first-floor composite non-disassembly insulation formwork is floor height + 50mm to ensure the molding quality.

[0055] For areas that cannot be laid out using the main specifications, the minimum width of non-main specification plates should not be less than 100mm, and this phenomenon should be avoided during 3D BIM modeling.

[0056] Small pieces of insulation boards placed inside the corner walls lack support, the corner cross-section is not large enough and the outer side is uneven. When laying out the BIM layout, adjust the left and right order of the insulation boards, and do not use insulation boards smaller than 100㎜ through the wall.

[0057] When laying out continuous panels, Revit needs to consider the 5mm panel gap and use the actual structural dimensions as the standard to avoid on-site re-cutting, ensure the redundancy of the installation width, and avoid excessive shaking of the installed panels.

[0058] Step 4. Construction preparation: produce and cut the non-disassembly insulation formwork, classify it and affix QR code labels, transport it to the site and classify and place it according to the building number. Draw the horizontal control line on site, install the horizontal support, and prepare auxiliary fixing materials such as anchor nails, iron wire, tying wire, nails, and steel bars.

[0059] Step 5. Draw lines: Compare the layout of the composite non-disassembly insulation formwork with the aluminum formwork deepening drawing to avoid the phenomenon of tension screws in the plate seams and loose joints causing slurry leakage.

[0060] Measure the position of the external angle according to the external wall control line or the floor control line, and place the control line at the position of the independent wall panel of the external wall. After installation, the external angle should be suspended vertically. During the reinforcement process of the insulation board, according to the external angle control line, each large angle should be corrected by hanging the line. After the external angle is corrected, pull the line to straighten it.

[0061] Step 6. Install the composite non-dismantling insulation formwork: Install the composite non-dismantling insulation formwork according to the design layout plan, and use binding wire to tie the connectors and steel bars to prevent them from tilting. Install the exterior wall corner panels first, then install the main wall panels. The joint width of the composite non-dismantling insulation formwork should not exceed 5mm. In order to ensure that the composite non-dismantling insulation formwork meets the requirements of no plastering, the uppermost part between the panels is hooked with a hook. 14 The steel bars are tightened to ensure that the joints are tight and not bad. When each layer of composite non-disassembly insulation formwork is erected, an aluminum formwork K plate is set on the lower layer to clamp the horizontal seam of the composite non-disassembly insulation formwork. The outside of the insulation board is reinforced with sponge strips around the window to ensure that there are no gaps. The length of the wooden square under the windowsill must be guaranteed to extend to the top of the lower K board. Cement support strips are set on both sides of the inner side of the joints of the composite non-disassembly insulation formwork, and are ≤100mm away from the edge of the joints.

[0062] Step 7. The construction site shall pre-set the holes in the composite non-removal insulation template and install anchors. There shall be no less than 5 anchors per square meter, the effective anchoring depth shall be no less than 30mm, and the installation hole shall be no less than 50mm from the edge of the composite non-removal insulation outer template. The prefabricated anchors shall be installed tightly without gaps, the plastic expansion sleeve anchor plate shall be embedded in the countersunk hole, and the anchor plate shall be flush with the composite non-removal insulation board leveling layer to achieve no protruding nail caps on the insulation board surface and good flatness of the outer surface of the insulation template. No need for later plastering and mesh hanging, and the exterior wall can be leveled without plastering, while shortening the exterior wall construction period.

[0063] Step 8. Binding of steel bars and pads: After the steel bars for outer columns, walls and beams are bound and accepted, cement mortar pads of the same strength are tied inside and outside the steel bars. Cement supports for corners and horizontal and vertical joints are put in place. The first cement support is placed 100mm from the horizontal joint at the bottom of the wall column. A row of cement supports is placed every 100mm on both sides of the joint of the insulation board, with a spacing of 600mm between the top and the bottom. Double rows of cement supports are placed on the top to ensure that there are cement supports at the corners and horizontal and vertical joints. A row of cement supports is placed 150mm from the bottom of the beam and at the top of the beam, and the wooden planks are placed flat at the outer joints.

[0064] Step 9. The positive and negative corners of the composite non-disassembly insulation formwork are reinforced with an aluminum formwork system. The aluminum formwork at the position of the external composite non-disassembly insulation board uses a negative corner formwork, and the aluminum formwork at the positive corner overlaps by 150mm. The aluminum formwork at some locations is used for vertical tensioning to ensure the quality of external insulation molding. The outside of the external insulation is configured with back ribs according to the aluminum formwork system, combined with 40×70 wooden squares and steel secondary ribs (the spacing between wooden squares and steel secondary ribs is 150mm) to ensure that the external wall composite insulation formwork is square, and the bottom of the composite non-disassembly insulation formwork is clamped with an aluminum formwork K plate.

[0065] Step 10. Set up the inner aluminum mold: Before installing the inner aluminum mold, the trapezoidal thread screw needs to be inserted in advance. When using the composite non-disassembly insulation template, considering its thickness, the hole of the inner aluminum mold screw needs to be slightly enlarged. In order to better reinforce and facilitate construction, deepen it in advance and open it in the factory in advance. 22mm hole to facilitate the subsequent insertion of PVC sleeve and the reinforcement and fixation of the tension screw with the T18 trapezoidal screw.

[0066] Step 11. Concrete pouring: Before pouring concrete, rinse the composite non-removal insulation formwork with water to ensure it is clean and moist, because the slurry may contaminate the upper and lower interfaces of the composite non-removal insulation formwork during the concrete pouring process, thereby affecting the flatness of the bonding part. Therefore, before pouring concrete, wooden formwork is needed to protect the interface of the composite non-removal insulation formwork. The size and shape of the wooden formwork are cut to match the length and width of the composite insulation board as needed, and cover it on the formwork. When vibrating the concrete, the vibrating rod must not directly contact the composite non-removal insulation formwork. Arrange a special person to watch the mold and check the insulation nails in time after the vibration is completed, and check the position of the insulation nails in time after the vibration is completed. When the insulation nails are found to be exposed, they should be immediately hammered into the wall.

[0067] Step 12. Removal of inner formwork and primary and secondary ribs: The time and requirements for removal of inner formwork and primary and secondary ribs shall be in accordance with the "Concrete Structure Engineering Construction Quality Acceptance Code" GB 50204 and "Technical Code for Safety of Construction Formwork" JGJ 162.

[0068] Step 13. Screw hole sealing:

[0069] 1) The external wall PVC through-wall pipe is pushed out by a pipe pusher (the recommended PVC pipe length for the unconstructed working surface = shear wall thickness + 1 / 2 insulation board thickness), and the pipe pusher is welded with 22 threaded steel bars 20 stainless steel hollow steel pipe pusher pushes out the PVC casing.

[0070] 2) Clean the dust, slurry, etc. in the screw hole.

[0071] 3) Fill the outer side of the screw hole with waterproof mortar 120mm (the waterproof mortar enters the concrete wall 20mm), and compact it with short steel bars. The waterproof mortar cake protrudes 3-4mm from the surface of the insulation board, and the diameter of the cake is 50mm;

[0072] 4) Fill the inside of the waterproof mortar with 120-130mm of foaming agent, and fill the inside of the screw hole with 50-60mm of waterproof mortar.

[0073] 5) After the mortar of the external insulation screw hole hardens, apply two coats of polyurethane waterproof coating evenly on the outside. The diameter of each coat of polyurethane is 60mm and the thickness of each coat is not less than 1mm.

[0074] In summary, the core of the present invention is:

[0075] 1. The present invention adopts one-time forming construction technology at the construction site of exterior wall formwork insulation and leveling

[0076] For the first time, the technology of forming the exterior wall formwork layer, insulation layer and mortar leveling layer in one go was used on the construction site, including the technology of prefabricating countersunk holes in the factory in advance and ensuring that the overall strength of the composite non-disassembly insulation formwork is not reduced after the countersunk holes are prefabricated.

[0077] 2. The present invention adopts the BIM-based composite non-disassembly insulation template in-depth layout technology

[0078] By using BIM-based composite non-disassembly insulation formwork to deepen the layout technology, first carry out BIM modeling of the exterior wall of the high-rise residential building, determine the layout of the insulation non-disassembly formwork and number it, and then use the processing size and anchor setting. Then, use the QR code at the construction site to easily understand the installation position of each panel. When layout with 3D modeling software, the composite non-disassembly insulation formwork is about 50mm higher than the structural floor. Therefore, the layout height of the first-floor composite non-disassembly insulation formwork is +50mm because of the floor height (it can also be 35mm lower than the structural floor), ensuring the molding quality and avoiding the waste of on-site processing and cutting materials, dust pollution and other problems.

[0079] 3. The present invention adopts the construction technology of thermal insulation and non-disassembly aluminum formwork for exterior walls based on aluminum formwork

[0080] An innovative method of aluminum formwork reinforcement has been developed. The aluminum formwork at the position of the external composite non-disassembly insulation board uses the internal corner formwork, and the aluminum formwork at the external corner is overlapped by 150mm. The aluminum formwork at the local position is vertically tied to ensure the molding quality of the external insulation. The outside of the external insulation is configured with back ribs according to the aluminum formwork system, and combined with 40×70 wooden squares and steel secondary ribs (the distance between wooden squares and steel secondary ribs is pulled 150mm by bolts at the external corners) to ensure that the external wall composite insulation formwork is square. The bottom of the composite non-disassembly insulation formwork is clamped with an aluminum formwork K plate, sponge strips are affixed around the windows, and the technology is used to ensure that there are no gaps after the outer formwork is reinforced.

[0081] 4. The present invention adopts the technology of plugging the screw hole of the pipe pusher

[0082] Using self-developed 22 threaded steel bar welding The pipe pusher of 20 stainless steel hollow steel pipe pushes out the PVC casing to seal the screw hole, ensuring the quality of the sealing and avoiding the construction technology method of quality problems of the composite insulation formwork exterior wall in the later stage.

[0083] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. An integrated construction method for the external wall formwork layer, insulation layer and leveling layer of a high-rise residential building, characterized in that: The following steps are involved: S1. Use prefabricated countersunk hole plaster-free composite non-removal insulation formwork to replace the traditional external formwork, wherein the prefabricated countersunk hole plaster-free composite non-removal insulation formwork is composed of a panel layer and a composite insulation layer; S2, factory prefabricated production of countersunk nail hole plaster-free composite non-disassembly insulation formwork; S3. Modeling, determining the specifications and quantity of the composite non-disassembly insulation formwork. When laying out, the composite non-disassembly insulation formwork should be 50 mm higher than the structural floor, and sufficient gap width space should be reserved during layout; S4. Construction preparation and coding of composite non-disassembly insulation formwork; S5, construction method of popping out the control line; S6. Install the composite non-disassembly insulation formwork according to the BIM layout plan, and use binding wire to tie the connectors and steel bars in place; S7. Install anchors. Pre-installed anchors must be installed tightly without gaps. The plastic expansion sleeve anchor plate must be embedded in the countersunk hole. The anchor plate must be flush with the leveling layer of the composite non-removal insulation board. S8. Strengthen the joints. Cement support strips are densely installed on both sides of the inner side of the joints. Cement supports are placed in place at the corners, horizontal and vertical joints. Double rows of cement supports are placed on the top. The wooden squares are placed flat at the outer joints. S9. The composite non-dismantling insulation formwork is reinforced with an aluminum formwork system at the inner and outer corners. Before reinforcement, a line is drawn to ensure the flatness and verticality of the board surface. First, the reinforcement system is deepened using BIM, and then the external composite non-dismantling insulation formwork is reinforced using an aluminum formwork of matching inner wall specifications. S10, erect the inner aluminum mold. Pre-install the trapezoidal threaded screws before installing the inner aluminum mold. The screw holes of the aluminum mold need to be enlarged. The VC sleeve is inserted and fixed with the T18 trapezoidal threaded screws and the tension screws. S11. Before pouring concrete, use a cover plate to protect the composite non-removal insulation formwork; when vibrating the concrete, the vibrating rod must not directly contact the composite non-removal insulation formwork; S12, template removal; S13, Screw hole plugging, use the designed pipe pusher to plug the joints, and then waterproof the joints.

2. The integrated construction method of the formwork layer, insulation layer and leveling layer of the exterior wall of a high-rise residential building according to claim 1 is characterized in that: In step S1, the prefabricated countersunk hole plaster-free composite non-disassembly insulation template is fixed on the wall surface as an exterior wall insulation system by riveting and gluing, and the countersunk holes are prefabricated in the factory. The depth of the countersunk holes is slightly larger than the depth of the anchor plate, which is convenient for the anchor plate to be set in the countersunk holes, so that the anchor plate is flush with the leveling layer of the composite non-disassembly insulation board. The exterior wall only needs to be partially leveled to complete straightening.

3. The integrated construction method of the formwork layer, insulation layer and leveling layer of the exterior wall of a high-rise residential building according to claim 1 is characterized in that: In step S2, a plaster-free composite non-disassembly insulation formwork with prefabricated countersunk holes is pre-produced and prepared in a factory, and the specific steps are as follows: S21. A formula for the mortar leveling layer of the composite non-dismantling insulation formwork is designed through experiments, and two layers of glass fiber mesh are added to ensure that the bending strength of the composite non-dismantling insulation formwork does not decrease after the countersunk holes are prefabricated, and no warping occurs, so as to ensure the quality of the composite non-dismantling insulation formwork, and that it can withstand the harsh weather outside and has a certain impact resistance; wherein, the formula of the mortar leveling layer is as follows: short fiber, ratio 0.5; anti-cracking double-fast cement, ratio 28; 40-70 mesh river sand, ratio 50; ordinary silicate cement 4.25, ratio 12; heavy calcium powder, ratio 8; additives, ratio 1.5; water-cement, ratio 0.18-0.19; S22, after mixing 5 mm thick mortar with polymer compound, silicate mineral aggregate, gelling agent and fiber, spread it on the extruded board coated with reinforcing interface agent, lay alkali-resistant glass fiber mesh at the same time, and place it on the curing rack for curing and drying; S23, turning over the above-mentioned single-sided mortar-coated extruded board that has reached the required curing requirements, and sending it to the production line to start paving the polystyrene granular mortar, and The paving of the surface mortar is to fill the wet material into the back of the extruded board coated with the reinforcing interface agent and dry it; specifically: 1) The other side of the polystyrene granule mortar paving extruded board has been coated with interface agent; 2) At the same time, cover the first side of the glass fiber mesh, and use a pressure roller to flatten the glass fiber mesh and the polystyrene particle mortar tightly; 3) Spread 3mm mortar on the first layer of glass fiber mesh; 4) Cover with a second layer of fiberglass mesh and spread 4-5mm surface mortar at the same time; 5) Enter the maintenance rack for maintenance; S24. Finished product curing: natural ventilation curing on curing racks, curing temperature above 5°C, curing for 5-6 days in summer, heating curing in winter, room temperature above 10°C, curing for 8-10 days; compressive and tensile strengths above 75% are considered to meet curing standards; S25, cut the finished products, punch the prefabricated countersunk holes and nail holes, the depth of the countersunk head of the countersunk hole is 5-7mm, the anchor plate is fixed in the countersunk head, the center of the countersunk hole is provided with a transparent nail hole, the number of countersunk nail holes is 4-5 per square meter; cut different sizes according to requirements, automatically punch holes, classify and stack, and then conduct quality inspection on thickness, length and width. After meeting the factory requirements, mark and pack for storage.

4. The integrated construction method of the formwork layer, insulation layer and leveling layer of the exterior wall of a high-rise residential building according to claim 1 is characterized in that: In the step S3, the accurate quantity and position of the composite non-disassembly insulation formwork for the exterior wall of the high-rise residential building are confirmed through three-dimensional modeling, and factory pre-processing is realized. The factory cuts and encodes the panels according to the three-dimensional layout drawing of the composite non-disassembly insulation formwork, and then transports them to the construction site for installation; wherein, the modeling software uses Revit three-dimensional modeling software to determine the layout and grid scheme according to the exterior wall size. When layouting with the three-dimensional modeling software, the layout height of the first layer of composite non-disassembly insulation formwork is the layer height + 50mm. For the parts that cannot be laid out with the main specifications, the minimum width of the non-main specification board should not be less than 100mm. When BIM layout is used, the left and right order of the insulation boards is adjusted, and insulation boards less than 100㎜ are not used through the wall. When laying out the continuous board surface, Revit should consider the board seam of 5mm.

5. The integrated construction method of the formwork layer, insulation layer and leveling layer of the exterior wall of a high-rise residential building according to claim 1 is characterized in that: In the step S5, the layout drawing of the composite non-disassembly insulation formwork is compared with the deepening drawing of the aluminum formwork to avoid the phenomenon of tension screws at the plate seam position and loose joints and leakage of mortar; the position of the external angle is measured according to the external wall control line or the floor control line, and the control line is placed at the position of the independent wall panel of the external wall, and the external angle is hung vertically after installation; during the reinforcement process of the thermal board, each large angle must be corrected by hanging a line according to the external angle control line, and the external angle is straightened after correction by pulling a through line.

6. The integrated construction method of the formwork layer, insulation layer and leveling layer of the exterior wall of a high-rise residential building according to claim 1 is characterized in that: In step S6, the composite non-disassembly insulation template is installed according to the design layout plan, and the connecting parts and the steel bars are tied and positioned with binding wires to prevent them from tilting; the outer wall corner panels are installed first, and then the main wall panels are installed. The joint width of the composite non-disassembly insulation template is not greater than 5mm. In order to ensure that the composite non-disassembly insulation template meets the requirements of free plastering, the uppermost part between the boards is connected with a hook. The steel bars are tightened to ensure that the joints are tight and not bad. When each layer of composite non-disassembly insulation formwork is erected, an aluminum formwork K plate is set on the lower layer to clamp the horizontal seam of the composite non-disassembly insulation formwork. The outside of the insulation board is reinforced with sponge strips around the window to ensure that there are no gaps. The length of the wooden square under the windowsill must be guaranteed to extend to the top of the lower K board. Cement support strips are set on both sides of the inner side of the joints of the composite non-disassembly insulation formwork, and are ≤100mm away from the edge of the joints.

7. The integrated construction method of the formwork layer, insulation layer and leveling layer of the exterior wall of a high-rise residential building according to claim 1 is characterized in that: In the step S7, the construction site pre-sets holes in the composite non-disassembly insulation formwork and installs anchors, with no less than 5 anchors per square meter, an effective anchoring depth of no less than 30 mm, and a distance of no less than 50 mm between the installation holes and the edge of the composite non-disassembly insulation outer formwork; the prefabricated anchors must be installed tightly without gaps, the plastic expansion sleeve anchor plate must be embedded in the countersunk hole, the anchor plate must be flush with the composite non-disassembly insulation board leveling layer, so that there are no protruding nail caps on the insulation board surface, and the outer surface of the insulation formwork has a good flatness, and there is no need for subsequent plastering and mesh hanging, so that the exterior wall can be leveled without plastering, and the exterior wall construction period can be shortened.

8. The integrated construction method of the formwork layer, insulation layer and leveling layer of the exterior wall of a high-rise residential building according to claim 1 is characterized in that: In step S8, the reinforcement of the outer columns, walls and beams is tied. After acceptance, cement mortar pads of the same strength are tied inside and outside the reinforcement, and cement supports are put in place at the corners and horizontal and vertical joints. The first cement support is placed 100 mm from the horizontal joint at the bottom of the wall column, and a row of cement supports is placed 100 mm on both sides of the insulation board joint, with a spacing of 600 mm between the upper and lower rows. Double rows of cement supports are placed on the top to ensure that there are cement supports at the corners and horizontal and vertical joints. A row of cement supports is placed 150 mm upward from the bottom of the beam and at the top of the beam, and the wooden squares are placed flat at the outer joints.

9. The integrated construction method of the formwork layer, insulation layer and leveling layer of the exterior wall of a high-rise residential building according to claim 1, characterized in that: In the step S9, the aluminum mold at the position of the external composite non-disassembly insulation board uses the inner corner template, the aluminum mold at the outer corner overlaps 150mm, and the aluminum mold at the local position is vertically tied to ensure the quality of the external insulation molding. The outer side of the external insulation is configured with a back rib according to the aluminum mold system, which is combined with 40×70 wooden squares and steel secondary ribs to ensure that the external wall composite insulation template is square, and the bottom of the composite non-disassembly insulation template is clamped with an aluminum mold K plate; in the step S10, before the inner aluminum mold is installed, the trapezoidal thread screw needs to be inserted in advance. When using the composite non-disassembly insulation template, considering its thickness, the hole of the inner aluminum mold screw needs to be enlarged, and it is opened in advance in the factory Holes are provided to facilitate the subsequent insertion of the PVC sleeve and the reinforcement and fixation of the tension screw with the T18 trapezoidal thread screw.

10. The integrated construction method of the formwork layer, insulation layer and leveling layer of the exterior wall of a high-rise residential building according to claim 1, characterized in that: In the step S11, before pouring concrete, the composite non-disassembly insulation formwork is first rinsed with water to ensure that it is clean and moist, because the slurry may contaminate the upper and lower interfaces of the composite non-disassembly insulation formwork during the concrete pouring process, thereby affecting the flatness of the bonding part. Therefore, before pouring concrete, a wooden formwork is needed to protect the interface of the composite non-disassembly insulation formwork. The size and shape of the wooden formwork are cut into a length and width that matches the composite insulation board as needed, and it is covered on the formwork; when vibrating the concrete, the vibrating rod shall not directly contact the composite non-disassembly insulation formwork, and the position of the insulation nails shall be checked in time after the vibration is completed. When the insulation nails are found to be exposed, they shall be immediately hammered into the wall; The step S13 comprises: 1) The external wall PVC through-wall pipe is pushed out by a pipe pusher, which is welded with 22 threaded steel bars The pusher of the stainless steel hollow steel pipe pushes out the PVC casing. The recommended length of the PVC pipe for the unconstructed working surface is the thickness of the shear wall + 1 / 2 the thickness of the insulation board. 2) Clean the dust, slurry, etc. in the screw hole; 3) The waterproof mortar is filled 120mm outside the screw hole, and the waterproof mortar enters the concrete wall 20mm. It is compacted with short steel bars. The waterproof mortar cake protrudes 3-4mm from the surface of the insulation board, and the diameter of the cake is 50mm; 4) Fill the inner side of the waterproof mortar with 120-130mm of foaming agent, and the inner side of the screw hole with 50-60mm of waterproof mortar; 5) After the mortar of the external insulation screw hole hardens, apply two coats of polyurethane waterproof coating evenly on the outside. The diameter of each coat of polyurethane is 60mm and the thickness of each coat is not less than 1mm.

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