Construction method for punching reconstruction of sandwich perlite composite wall

Abstract

The invention provides a construction method for punching transformation of a sandwich perlite composite wall. The construction method comprises the following steps that S1, construction preparation is conducted; s2, measuring and marking the sideline of the opened hole on the wall body with the opened hole; s3, a back-jacking supporting unit supported between a floor and a top plate is arranged in front of the wall with the opened hole; s4, water drilling and hole taking are conducted on the wall with the opened hole along the periphery of the side line, a grouting nozzle is embedded in the hole, and pressure grouting is conducted; s5, lintel construction is conducted on the wall with the opened hole along the side line; s6, the original masonry in the sideline range is statically dismantled through a water drill; s7, constructional columns are arranged on the two sides of the opened hole; and S8, the back-jacking supporting unit is dismantled. Pearlite in the wall body is fixed by adopting a pre-pressure cement paste injection technology, so that the problems that the construction is influenced and the thermal insulation performance of the wall body is reduced because the pearlite flows out in the punching process are solved; and drilling and dismantling of the wall body are achieved through water drill static dismantling, large disturbance to the wall body is avoided, and construction safety is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of wall hole reconstruction, and in particular relates to a construction method for hole reconstruction of a sandwich perlite composite wall. Background Art

[0002] With the continuous development of modern construction technology, the performance and construction efficiency of wall materials have become the focus of the construction industry. As a new type of composite wall that integrates insulation, enclosure and load-bearing, the sandwich perlite composite wall is widely used in various construction projects such as residential, commercial buildings and industrial plants due to its light weight, high strength, good fire resistance, excellent sound insulation and simple construction. This wall material not only helps to promote residential industrialization, but also effectively achieves the dual carbon goals of the construction industry, and has good application prospects.

[0003] In order to save land, reduce construction costs, and reduce the number of demolition and reconstruction projects, more and more buildings need to be reinforced and renovated for reuse. In the process of renovating buildings with sandwich perlite composite walls, the walls need to open new door and window openings, which can easily lead to the following problems: 1. The stress state of the wall changes, which poses a great safety hazard; 2. Sandwiched perlite is not easy to fix during construction and is easy to flow out; 3. Ordinary concrete is usually used for renovation and new construction of structures. However, the strength of ordinary concrete increases slowly and the wall stress is in an unstable state for a long time.

[0004] It should be particularly noted that the above technical information is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as admitting or implying in any form that the above technical information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0005] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a construction method for hole reconstruction in a sandwich perlite composite wall, which solves the problems of great safety hazards when the stress state of the wall changes, the difficulty of fixing the sandwich perlite during construction and its easy flow out, and the long duration of the unstable stress state of the wall.

[0006] The technical solution of this application is: A construction method for hole opening reconstruction of a sandwich perlite composite wall comprises the following steps: S1: Construction preparation; S2: Measure and mark the edge of the opening on the wall where the opening is to be made; S3: A top support unit supported between the floor and the top plate is arranged in front of the wall with the opening; S4: Drill holes along the periphery of the edge of the wall where the hole is to be opened, bury grouting nozzles in the holes and perform pressure grouting; the perlite in the sandwich perlite composite wall is fixed by pre-pressure grouting technology, which solves the problem of perlite flowing out during the hole opening process, affecting construction and reducing the thermal insulation performance of the wall; S5: The lintel is constructed along the edge of the wall where the opening is made. The newly added lintel at the opening adopts high-strength non-shrinkage self-compacting grouting material, which increases the strength quickly and can be removed in three days, thus shortening the time when the wall is in an unstable state and ensuring construction safety. S6: The original masonry within the boundary range is demolished statically by water drilling; the drilling and demolition of the sandwich perlite composite wall are all demolished statically by water drilling. During the demolition process, water drilling cutting avoids large disturbances to the wall and does not damage the surrounding building structures, ensuring the safety of construction. At the same time, compared with other demolition methods, the vibration and noise generated by water drilling cutting during the construction process are very small, which helps to protect the surrounding environment and personnel safety; water drilling cutting technology uses advanced drilling machinery equipped with diamond drill bits, which can quickly drill holes in concrete, bricks, stones and other substrates, thereby improving construction efficiency and shortening construction period; during the water drilling cutting process, the use of water cooling and cutting technology effectively reduces the generation of dust; the cutting surface of water drilling cutting is smooth and does not require too much rest work, saving construction time and cost; during the demolition process, water drilling cutting can accurately control the cutting range to ensure that there is no damage to the retained structure; S7: Structural columns are set on both sides of the opening; S8: Remove the top support unit.

[0007] Furthermore, the top return support unit includes a transverse steel pipe and a longitudinal steel pipe, and the distance between the transverse steel pipe and the longitudinal steel pipe and the wall with the opening is less than or equal to 500 mm.

[0008] Furthermore, in step S4, a plurality of holes are provided along the periphery of the edge line, the diameter of the holes is 32 mm, and the spacing between the holes is 30 cm.

[0009] Furthermore, in step S4, the slurry in the pressure grouting includes cement, water, and water glass, and the water-cement ratio is 0.9:1.

[0010] Furthermore, the cement adopts ordinary Portland cement with a strength of 42.5MPa.

[0011] Furthermore, the pressure of the pressure grouting is 0.3Mpa.

[0012] Furthermore, the specific steps of step S4 are as follows: S4.1: Surface preparation; S4.2: Grouting nozzle position setting; S4.3: Drill holes and install grouting nozzles; S4.4: Seam sealing; S4.5: Pressure grouting.

[0013] Furthermore, in step S4.5, the pressure grouting is performed in two steps. The first pressure grouting is performed from bottom to top, hole by hole. The second pressure grouting is performed from top to bottom, with supplementary grouting.

[0014] Furthermore, the interval between the first pressure grouting and the second pressure grouting is three minutes.

[0015] Furthermore, the specific steps of step S5 are as follows: S5.1: Several openings are provided at intervals at the lintel position and supports are installed in the openings; S5.2: Static demolition of walls between supports using a water drill; S5.3: Tie up the lintel reinforcement, set up the formwork, cast the lintel with C40 non-shrinkage self-compacting grouting concrete, and cure for not less than 7 days.

[0016] The specific beneficial effects of the present invention include: 1. The perlite in the sandwich perlite composite wall is fixed by pre-pressure cement slurry injection technology, which solves the problem of perlite flowing out during the hole opening process, affecting the construction and reducing the thermal insulation performance of the wall; 2. The drilling and demolition of the sandwich perlite composite wall are both done by static demolition with water drills. During the demolition process, water drill cutting avoids causing large disturbances to the wall and does not damage the surrounding building structures, ensuring the safety of the construction. At the same time, compared with other demolition methods, the vibration and noise generated by water drill cutting during the construction process are very small, which helps to protect the surrounding environment and personnel safety; water drill cutting technology uses advanced drilling machinery equipped with diamond drill bits, which can quickly drill holes in concrete, bricks, stones and other substrates, thereby improving construction efficiency and shortening construction period; during the water drill cutting process, the use of water cooling and cutting technology effectively reduces the generation of dust; the cutting surface of water drill cutting is smooth and does not require too much rest work, saving construction time and cost; during the demolition process, water drill cutting can accurately control the cutting range to ensure that there is no damage to the retained structure; 3. The demolition of the wall opening adopts a combination of demolition and support technology. The support members in the lintel can effectively bear part of the load generated by the demolition operation, reducing the risk during the construction process and ensuring safety and stability during the wall opening construction. At the same time, the wall can be demolished in an orderly and segmented manner, avoiding the construction chaos and delays that may be caused by disorderly demolition; 4. The newly added lintel at the opening adopts high-strength, non-shrinkage, self-compacting grouting material, which increases strength quickly and can be removed in three days, thus shortening the time the wall is in an unstable state and ensuring construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1 It is a construction method step diagram of the present invention; Figure 2 It is a schematic diagram of the top support unit; Figure 3 is a schematic diagram of step S4; Figure 4 This is an illustration of step S5. Figure 1 ; Figure 5 This is an illustration of step S5. Figure 2 ; Figure 6 is a schematic diagram of step S6.

[0019] Description of Figure Numbers: 1. Wall; 2. Top support unit; 3. Cave entrance; 4. Support parts; 5. Structural columns; 6. Hole; 7. Lintel; 8. Sideline. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0022] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "several" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "radial" and the like indicate positions or positional relationships only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0023] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0024] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0025] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0026] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the corresponding technologies, methods, and equipment should be considered part of the specification.

[0027] A construction method for hole opening reconstruction of sandwich perlite composite wall, such as Figure 1 As shown, the following steps are included: S1: Construction preparation; before construction, clean up the surroundings of the components to be demolished, remove the upper attachments, and do a good job of safety protection around the work surface and erection of operating scaffolding. Demolition is carried out in a top-down order. Before demolition, professional technicians will conduct a briefing. During demolition, professional technicians will be sent on-site for guidance and professional and technical workers will perform the operation to avoid wrong demolition and erroneous demolition, which will cause unnecessary losses and troubles, and increase the investment in project costs and construction period.

[0028] S2: Measure and mark the edge line 8 of the opening on the wall 1 where the opening is to be made; strictly follow the design drawings to lay out the construction, use the ink fountain to pop out the edge line 8 of the opening, and report the layout record to the supervisor or the owner unit in a timely manner. After the supervisor or the owner's engineer has accepted it, the hole construction can be carried out. When laying out the lines, the water drill control line should also be marked with red paint, 100mm away from the demolition edge line, to avoid damaging the retained structure when drilling.

[0029] S3: a top support unit 2 supported between the floor and the top plate is arranged in front of the wall 1 with the opening; S4: drilling holes 6 along the periphery of the edge line 8 on the wall 1 with the opening, burying grouting nozzles in the holes 6 and performing pressure grouting to reinforce the area around the edge line 8, effectively preventing the perlite from flowing out, and enhancing the stability and firmness of the wall with the opening; S5: On the wall 1 with the opening, the lintel 7 is constructed along the edge line 8, such as Figure 5 As shown; S6: Use a water drill to statically demolish the original masonry within the range of edge line 8; after the lintel concrete reaches the required strength, use a water drill to drill and cut the remaining three sides of the opening, then demolish the opening masonry, chisel the structural column position into a tongue-and-groove joint, and clean it up.

[0030] S7: Figure 6 As shown, structural columns 5 are set on both sides of the opening; the positions of the newly added structural columns are rinsed with clean water, steel bars are tied, formwork is set up, and the lintel is poured with C40 non-shrinkage self-compacting grouting material, and the curing period is not less than 7 days.

[0031] S8: Dismantle the back-to-top support unit 2. After the structural column reaches the required strength, dismantle the back-to-top support unit 2 and transport the garbage to the location designated by the owner.

[0032] Specifically, the wall must be supported before demolition. The lintel should be constructed first, and the structural column can be constructed after the lintel strength reaches the requirements. The wall should be demolished by static demolition of the periphery with a water drill first, and then the middle part of the wall should be demolished with an electric hammer after separation from the wall. When demolishing the wall, the lintel should be supported first to prevent the lintel from being stressed too early.

[0033] Based on the above implementation, as a preferred implementation, Figure 2 As shown, the roof return support unit 2 includes a transverse steel pipe and a longitudinal steel pipe arranged between the floor and the roof, and the distance between the transverse steel pipe and the longitudinal steel pipe and the wall 1 with the opening is less than or equal to 500 mm.

[0034] Specifically, the top plate is backed up with a fastener-type steel pipe to remove the load of the top plate on the wall. The spacing between the transverse steel pipe and the longitudinal steel pipe is 800×800mm, the step distance is 1200mm, the erection range is not less than 2m around the pre-opening opening, and the back-up support unit 2 is no more than 500mm away from the wall 1. During the erection of the support, diagonal braces and scissor braces should be set in time to avoid deflection and tipping of the scaffolding during the erection process and increase the stability of the support.

[0035] Based on the above embodiment, as a preferred embodiment, in step S4, the holes 6 are provided along the periphery of the edge line 8 for water drilling. Figure 3 As shown, the diameter of hole 6 is 32 mm, the spacing between holes 6 is 30 cm, the density is reasonably set, and the hole depth should be taken to the perlite position.

[0036] On the basis of the above implementation, as a preferred implementation, in step S4, the slurry in the pressure grouting includes cement, water, and water glass. In order to increase the stone formation rate of the slurry, 1.5% glass water is added, and the water-cement ratio is 0.9:1.

[0037] On the basis of the above implementation, as a preferred implementation, the grouting adopts a single-liquid grouting process, with cement as the main curing agent, and the cement adopts ordinary Portland cement with a strength of 42.5 MPa.

[0038] On the basis of the above implementation, as a preferred implementation, the pressure of the pressure grouting is 0.3 MPa, and the grouting pressure is designed on the principle of forming splitting slurry veins in the interlayer and ensuring that the structure is not damaged.

[0039] Specifically, the equipment required for grouting construction mainly includes drilling equipment, high-pressure grouting pumps and slurry mixers; the supporting equipment includes high-pressure grouting hoses, grouting flower pipes, slurry storage barrels, water tanks, power cords, control boxes, scales, etc.

[0040] Layout of grouting equipment: The grouting machinery should be as close to the grouting site as possible, and the mechanical equipment should be placed in a larger area. This is both safe and easy to operate. The specific layout should be adjusted according to actual conditions.

[0041] Based on the above implementation, as a preferred implementation, the specific steps of step S4 are as follows: S4.1: Surface preparation; S4.2: Grouting nozzle position setting; S4.3: Drill holes and install grouting nozzles; S4.4: Seam sealing; S4.5: Pressure grouting.

[0042] Specifically, after drilling, first use an air compressor to blow away the dust in the hole, and then install the grouting nozzle. Pressure grouting is carried out twice. The first pressure grouting is grouting from bottom to top, and the second pressure grouting is grouting from top to bottom. The interval between the first pressure grouting and the second pressure grouting is three minutes. Each grouting is done until no grouting is done or the grouting overflows from the adjacent small nozzles, and the nozzles that have been grouted are blocked with rubber plugs or wooden plugs while grouting.

[0043] Based on the above implementation, as a preferred implementation, the specific steps of step S5 are as follows: S5.1: Several openings 3 are provided at intervals at the lintel position, such as Figure 4 As shown, a support member 4 is installed in the hole 3; S5.2: Use a water drill to statically demolish the wall between the supports 4; S5.3: Tie up the lintel reinforcement, set up the formwork, cast the lintel with C40 non-shrinkage self-compacting grouting concrete, and cure for not less than 7 days.

[0044] Specifically, the support member 4 is a steel support. Holes are punched locally at the concrete lintel position with a spacing of 30 cm. The steel support is installed to support the load transmitted from the upper wall. The steel support is a Φ45 stainless steel pipe with a thickness of not less than 3 mm. Then, a water drill is used to statically remove the middle wall of the steel support, tie the lintel steel bars, support the formwork, and cast the lintel with C40 non-shrinkage self-compacting grouting concrete, and the curing period is not less than seven days.

[0045] The perlite in the sandwich perlite composite wall of the present invention is fixed by pre-pressure cement slurry injection technology, which solves the problem that the perlite flows out during the hole opening process, affects the construction, and reduces the thermal insulation performance of the wall; the drilling and demolition of the sandwich perlite composite wall are both carried out by static demolition with a water drill. During the demolition process, the water drill cutting avoids a large disturbance to the wall and does not cause damage to the surrounding building structure, thereby ensuring the safety of the construction. At the same time, compared with other demolition methods, the vibration and noise generated by the water drill cutting during the construction process are very small, which helps to protect the surrounding environment and personnel safety; the water drill cutting technology adopts advanced drilling machinery equipped with a diamond drill bit, which can quickly drill holes in substrates such as concrete, bricks, and stones, thereby improving construction efficiency and shortening construction period; during the water drill cutting process, Due to the use of water cooling and cutting technology, the generation of dust is effectively reduced; the cutting surface of water drill cutting is flat and smooth, and there is no need for excessive rest work, saving construction time and cost; during the demolition process, water drill cutting can accurately control the cutting range to ensure that there is no damage to the retained structure; the wall opening demolition adopts a combination of demolition and support technology. The support members in the lintel can effectively bear part of the load generated by the demolition operation, reducing the risk in the construction process, ensuring safety and stability during the wall opening construction, and at the same time, it can realize the orderly and segmented demolition of the wall, avoiding the construction chaos and delays that may be caused by disorderly demolition; the new lintel at the opening adopts high-strength non-shrinkage self-compacting grouting material, which increases strength quickly and can be removed in three days, shortening the time that the wall is in an unstable state and ensuring construction safety.

[0046] The details not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0047] The above content shows and describes the basic principles, main features and beneficial effects of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A construction method for hole opening reconstruction of sandwich perlite composite wall, characterized by: The following steps are involved: S1: Construction preparation; S2: Measure and mark the edge line (8) of the opening on the wall (1) where the opening is to be made; S3: a top support unit (2) supported between the floor and the top plate is arranged in front of the wall (1) with the opening; S4: drilling a hole (6) along the outer periphery of the edge line (8) on the wall (1) where the hole is to be opened, burying a grouting nozzle in the hole (6) and performing pressure grouting; S5: constructing a lintel (7) along the edge line (8) on the wall (1) where the opening is opened; S6: statically demolish the original masonry within the boundary line (8) by water drilling; S7: Structural columns (5) are arranged on both sides of the opening; S8: Remove the top support unit (2).

2. The construction method for hole opening reconstruction of sandwich perlite composite wall according to claim 2 is characterized in that: The top return support unit (2) comprises a transverse steel pipe and a longitudinal steel pipe, and the distance between the transverse steel pipe and the longitudinal steel pipe and the wall (1) with the opening is less than or equal to 500 mm.

3. The construction method for hole opening reconstruction of sandwich perlite composite wall according to claim 2, characterized in that: In step S4, a plurality of holes (6) are arranged along the outer circumference of the edge line (8), the diameter of the holes (6) is 32 mm, and the spacing between the holes (6) is 30 cm.

4. The construction method for hole opening reconstruction of sandwich perlite composite wall according to claim 2 is characterized in that: In step S4, the slurry in the pressure grouting includes cement, water, and water glass, and the water-cement ratio is 0.9:

1.

5. The construction method for hole opening reconstruction of sandwich perlite composite wall according to claim 4 is characterized in that: The cement used is ordinary Portland cement with a strength of 42.5 MPa.

6. The construction method for hole opening reconstruction of sandwich perlite composite wall according to claim 4 is characterized in that: The pressure of the pressure grouting is 0.3Mpa.

7. The construction method for hole opening reconstruction of sandwich perlite composite wall according to claim 2, characterized in that: The specific steps of step S4 are as follows: S4.1: Surface preparation; S4.2: Grouting nozzle position setting; S4.3: Drill holes and install grouting nozzles; S4.4: Seam sealing; S4.5: Pressure grouting.

8. The construction method for hole opening reconstruction of sandwich perlite composite wall according to claim 7 is characterized in that: In step S4.5, the pressure grouting is performed in two steps. The first pressure grouting is performed from bottom to top, hole by hole. The second pressure grouting is performed from top to bottom, with additional grouting.

9. The construction method for hole opening reconstruction of sandwich perlite composite wall according to claim 8, characterized in that: The interval between the first pressure grouting and the second pressure grouting is three minutes.

10. The construction method for hole opening reconstruction of sandwich perlite composite wall according to claim 2, characterized in that: The specific steps of step S5 are as follows: S5.1: a plurality of openings (3) are arranged at intervals at the lintel position, and support members (4) are installed in the openings (3); S5.2: Static demolition of the wall between the supports (4) using a water drill; S5.3: Tie up the lintel reinforcement, set up the formwork, cast the lintel with C40 non-shrinkage self-compacting grouting concrete, and cure for not less than 7 days.

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