Staggered construction method for walls at the junction of high and low buildings without external scaffolding

Abstract

The present invention discloses a staggered construction method for walls at the junction of high and low buildings without external frame. Under the condition that there is at least one floor difference in height between the high and low buildings on both sides of the expansion joint and there is no external frame protection, a temporary edge protection structure in the form of a steel mesh is formed by raising the vertical steel bars on the steel structure of the first exterior wall of the current construction floor of the high building and tying the lower steel structure of the first exterior wall of the next construction floor in advance. On the other hand, safety frames are set up at both ends of the expansion joint and suspended cables are tied, so that construction workers on the operating platform on the external formwork can tie safety ropes to ensure the safety of construction workers on the operating platform at high altitude. Guardrails and other measures are provided on the outer edge of the operating platform to ensure the safety of high-side edge operations. The present invention solves the problem that during the staggered construction of high and low buildings, the construction of the high-side building does not have external frame protection, which poses a major safety hazard.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a staggered-layer construction method for walls at adjacent locations of high and low buildings without external scaffolding. Background Art

[0002] Buildings on the street side of residential areas often have different heights due to design requirements for the facade effect. Usually, the expansion joint is used as the boundary, with the high side reaching 27 or 28 stories and the low side only 12 or 13 stories. Figure 1 As shown, based on construction experience and cost considerations, climbing frames and aluminum formwork systems are generally used on the high side, while cantilever scaffolding and wooden formwork systems are used on the low side. Taking into account factors such as the installation of climbing frame lifting guides, the installation and removal of aluminum formwork on the high side, the reinforcement and removal of wooden formwork on the low side, and the filling of insulation boards in expansion joints, the construction of the walls on the high and low sides should be staggered by at least 1 to 2 floors (partially reaching 4 floors for a short time). This creates a non-external scaffolding protection zone at least 2 stories high, which is equivalent to exposing workers in the high-side expansion joint area to the public, and construction in this area is easily affected by external interference. Without external scaffolding protection, the safety of high-side building construction is not guaranteed, posing a major safety hazard.

[0003] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0004] In order to overcome the defects of the existing technology, a staggered-layer construction method for walls at the junction of high and low buildings without external scaffolding is provided to solve the problem that during the staggered construction of high and low buildings, there is no external scaffolding protection for the construction of high-side buildings, which poses a major safety hazard.

[0005] To achieve the above object, a method for staggered construction of walls at the junction of high and low buildings without external scaffolding is provided, comprising the following steps:

[0006] a. staggered construction of the first floor structure of the taller building and the second floor structure of the lower building, so that the construction floor of the first floor structure is higher than the construction floor of the second floor structure. During the construction of the first floor structure, the reinforcement structure of the first exterior wall of the first floor structure near the expansion joint is tied together, and inner and outer formwork are erected on opposite sides of the reinforcement structure of the first exterior wall, so that the inner formwork is tied to the outer formwork, and the vertical main reinforcement of the reinforcement structure of the first exterior wall extends to the first exterior wall position of the next construction floor;

[0007] b. Installing safety frames at opposite ends of the first exterior wall;

[0008] c. Tie a suspension rope between the two safety frames;

[0009] d. Install an operating platform on the upper part of the outer template, and install a guardrail on the outer edge of the operating platform;

[0010] e. On the operating platform, the construction workers are connected to the suspension cable by a safety rope and tie the upper end of the vertical main reinforcement to the lower steel structure of the first exterior wall of the next construction floor as a temporary edge protection structure;

[0011] f. Casting the first exterior wall of the construction floor of the first floor structure in the inner and outer formwork;

[0012] g. tying the upper layer steel structure onto the lower layer steel structure to form the steel structure of the next construction floor;

[0013] h. Installing a plurality of supporting members on the cast first exterior wall, and setting up inner and outer formwork on the plurality of supporting members, so that the steel structure of the next construction floor is set in the inner and outer formwork;

[0014] i. Repeat steps d to h to construct the first exterior wall of the first floor structure layer by layer from bottom to top.

[0015] Furthermore, a wall sleeve is pre-embedded in the first exterior wall, and the support member has a first end and a second end opposite to each other. The first end of the support member is inserted into the wall sleeve, and the second end is supported by the exterior template.

[0016] Furthermore, the second end of the support member is bent upward to form a pressing portion, and the pressing portion presses against the outer side of the outer template.

[0017] Furthermore, a limiting member is adjustably mounted on the first end of the support member, and the limiting member presses against the outer side of the inner template.

[0018] Furthermore, the lower steel bar structure is formed with a gap, and a protective grille for sealing the gap is detachably installed at the gap.

[0019] Furthermore, the outer formwork includes a plurality of metal unit plates spliced together.

[0020] Furthermore, the uppermost metal unit plate is provided with lifting lugs.

[0021] Furthermore, the upper portion of the outer side of the outer template is connected to a support frame, the top of the support frame is provided with a pedal, and the guardrail is installed on the outer edge of the top of the support frame.

[0022] The beneficial effects of the present invention are that the staggered-layer construction method for walls at the junction of high and low buildings without external frames of the present invention ensures that there is at least one floor difference in height between the high and low buildings on both sides of the expansion joint and there is no external frame protection. By raising the vertical steel bars on the steel structure of the first exterior wall of the current construction floor of the high building and tying the lower steel structure of the first exterior wall of the next construction floor in advance, a temporary edge protection structure in the form of a steel mesh is formed. On the other hand, by setting up safety frames at both ends of the expansion joint and pulling suspension cables, construction workers on the operating platform on the external formwork can tie safety ropes to ensure the safety of construction workers on the operating platform at high altitude. The outer edge of the operating platform is provided with guardrails and other measures to ensure the safety of high-side edge operations. The staggered-layer construction method for walls at the junction of high and low buildings of the present invention ensures the construction safety of the exterior wall at the expansion joint of the high building through multiple safety protection measures, so that the personal safety of construction workers is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0024] Figure 1 This is a schematic diagram of the construction status of walls at the junction of high and low buildings in the prior art.

[0025] Figure 2 This is a schematic diagram of the staggered construction state of the walls at the adjacent high and low buildings without external scaffolding according to an embodiment of the present invention.

[0026] Figure 3 Schematic diagram of the layout of the suspension cables according to an embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of the first steel bar structure binding of the first floor structure of an embodiment of the present invention.

[0028] Figure 5 This is a schematic diagram of the erection status of the inner and outer formwork of a construction floor according to an embodiment of the present invention.

[0029] Figure 6 This is a schematic diagram of the binding of the lower steel bar structure of the next construction floor of the first floor structure according to an embodiment of the present invention.

[0030] Figure 7 This is a schematic diagram of the staggered casting state of the exterior wall of a construction floor according to an embodiment of the present invention.

[0031] Figure 8 This is a front view of the outer template of an embodiment of the present invention.

[0032] Figure 9 This is a rear view of the outer template of an embodiment of the present invention.

[0033] Figure 10 Schematic diagram of the structure of the support frame according to an embodiment of the present invention.

[0034] Figure 11 Schematic diagram of the structure of the connection node between the support frame and the outer formwork according to an embodiment of the present invention.

[0035] Figure 12 This is a schematic diagram of the lower installation state of the outer formwork according to an embodiment of the present invention.

[0036] Figure 13 This is a schematic diagram of the installation status of the outer formwork of the next construction floor in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0038] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] Reference Figures 2 to 13 As shown, the present invention provides a method for staggered construction of walls at adjacent high and low buildings without external scaffolding, comprising the following steps:

[0040] a. The first floor structure 1 of the high building A and the second floor structure 2 of the low building B are constructed in staggered layers, so that the construction floor of the first floor structure 1 is higher than the construction floor of the second floor structure 2. When constructing the first floor structure 1, the steel structure 11 of the first exterior wall 7 near the expansion joint D of the first floor structure 1 is tied and inner and outer formwork are set up on opposite sides of the steel structure of the first exterior wall 7, so that the inner formwork 4 is tied to the outer formwork 3, and the vertical main reinforcement 111 of the steel structure of the first exterior wall 7 extends to the position of the first exterior wall 7 of the next construction floor.

[0041] For details, see Figure 2 、 Figure 6 and Figure 7 As shown, the second exterior wall is not cast in the figure. The high-rise building and the low-rise building are arranged opposite to each other, and an expansion joint D is formed between the first exterior wall 7 on one side of the high-rise building and the second exterior wall on one side of the low-rise building.

[0042] Staggered construction means that when the second floor structure of the nth floor of the lower floor is being constructed, at least the first floor structure of the n+1th floor of the higher floor is being constructed. In this embodiment, the higher building is constructed one floor ahead of the lower building.

[0043] See Figures 4 to 7 The following diagram illustrates the construction steps for the first exterior wall of the lowest floor structure of a high-rise building. Specifically, during construction of the first floor structure 1, the reinforcement structure 11 of the first exterior wall 7 near the expansion joint D of the first floor structure 1 is first tied. Then, inner and outer formwork are installed on opposite sides of the reinforcement structure of the first exterior wall 7, with the inner formwork 4 tied to the outer formwork 3 and the vertical main reinforcement 111 of the reinforcement structure of the first exterior wall 7 extending to the first exterior wall of the next construction floor.

[0044] In this embodiment, the inner and outer formwork are connected by tension bolts. During construction of the lowest exterior wall, the inner and outer formwork can be directly supported on the foundation structure. When constructing the next floor, the outer formwork can be installed outside the already cast first exterior wall, while the inner formwork is supported on the floor deck of the next floor.

[0045] b. Install safety frames 6 at opposite ends of the first exterior wall 7.

[0046] In this embodiment, the safety frame 6 is installed at opposite ends of the steel structure of the first exterior wall by means of scaffolding. The height of the safety frame increases layer by layer. Accordingly, the height of the scaffolding also gradually increases.

[0047] c. Tie the suspension rope 61 between the two safety frames 6.

[0048] In some embodiments, see Figure 2 and Figure 3 The safety frame is connected to the floor slab of the high-rise building through diagonal braces. The suspension cable directly connected to the safety frame is a steel wire rope.

[0049] d. An operating platform 5 is installed on the upper part of the outer template 3, and a guardrail 52 is installed on the outer edge of the operating platform 5.

[0050] See Figure 5 、 Figure 6 、 Figure 10 、 Figure 11 As shown, the operating platform is installed on the outer side of the outer template. Specifically, the upper part of the outer side of the outer template 3 is connected to a support frame 51. The top of the support frame 51 is paved with a stepping pedal 53. A guardrail 52 is installed on the outer edge of the top of the support frame 51.

[0051] In this embodiment, a skirting board is installed on the outer side of the guardrail.

[0052] As a preferred embodiment, the outer formwork 3 includes a plurality of metal unit plates spliced together.

[0053] In this embodiment, the metal unit plate is an aluminum template. The uppermost metal unit plate is provided with a lifting lug 31 .

[0054] For details, see Figure 9, the lifting lug 31 is an inverted U-shaped steel bar.

[0055] The inverted U-shaped steel bar has a closed end and an open end. The closed end of the inverted U-shaped steel bar extends above the outer formwork. The open end of the inverted U-shaped steel bar is pressed against the reinforcing back rib of the outer formwork. Specifically, the intersection of the open end of the inverted U-shaped steel bar and the reinforcing back rib is manually bent into a concave arc of R150 to ensure that the open end of the inverted U-shaped steel bar and the reinforcing back rib are fully welded, and the weld height is 6mm. The two limbs of the open end of the inverted U-shaped steel bar are manually bent upward 180° to hook the bottom row of pressing back ribs on the outside of the outer formwork (the pressing back ribs are connected with multiple tension bolts). (The opening of the closed end of the inverted U-shaped steel bar is 300mm, and it extends 400mm above the outer formwork.

[0056] The tension screws are special tension rods for aluminum molds, with a horizontal spacing of 600mm. They are welded into a whole with the compression back ribs made of third-grade ф25 steel bars in accordance with the design requirements to form a combined structure.

[0057] e. On the operating platform 5, the construction workers connect to the suspension cable with a safety rope and tie the lower steel reinforcement structure of the first exterior wall 7 of the next construction floor to the upper end of the vertical main reinforcement to serve as a temporary edge protection structure C.

[0058] When tying the lower reinforcement of the first exterior wall of the next construction floor or pouring the first exterior wall of the current construction floor, construction workers can stand on the pedals of the operating platform to perform the corresponding operations. At the same time, construction workers are tied with a safety rope, the other end of which slides onto the suspension cable. The operating platform, guardrails, and safety ropes provide multiple safeguards for construction workers, improving the safety of construction work near edges or at heights and reducing potential safety hazards.

[0059] The temporary edge protection structure reduces the risk of construction workers falling from a height on the side of the lower steel structure away from the second floor structure.

[0060] f. Cast the first exterior wall 7 of the construction floor of the first floor structure 1 in the inner and outer formworks 3.

[0061] See Figure 7 After pouring the first exterior wall of the current construction floor, the interior and exterior formwork can be removed first if conditions permit, and then multiple supports can be installed on the first exterior wall for the exterior formwork of the next construction floor to rest on.

[0062] g. Tie the upper steel structure to the lower steel structure to form the steel structure of the next construction floor.

[0063] After the first exterior wall of the current construction floor is poured, the upper reinforcement structure is continued to be tied to the lower reinforcement structure to form a complete reinforcement structure for the next construction floor.

[0064] In this embodiment, a gap is formed in the lower steel bar structure, and a protective grille 9 for blocking the gap is detachably mounted at the gap.

[0065] After the first exterior wall is poured, the gap forms a construction portal, which can be opened and closed by removing the protective grille.

[0066] h. Install multiple supports 8 on the first cast exterior wall 7, and set up inner and outer formwork 3 on the multiple supports 8, so that the steel structure of the next construction floor is set in the inner and outer formwork.

[0067] After the curved steel bar structure of the next construction floor is tied, multiple supports 8 are installed on the cast first exterior wall 7, and inner and outer formwork 3 are set up on the multiple supports 8, so that the steel bar structure of the next construction floor is set in the inner and outer formwork.

[0068] In this embodiment, a wall bushing is pre-embedded in the first exterior wall 7. The support member 8 has a first end and a second end opposite to each other. The first end of the support member 8 is inserted into the wall bushing, and the second end is supported by the exterior formwork 3.

[0069] As a preferred embodiment, see Figure 12 As shown, the second end of the support member 8 is bent upward to form a pressing portion 81. The pressing portion 81 presses against the outer side of the outer template 3.

[0070] The first end of the support member 8 is adjustably mounted with a limiting member 82 , which is pressed against the outer side of the inner template 4 .

[0071] In this embodiment, the retaining member is a nut. The first end of the support member is formed with an external thread. The retaining member is threadedly engaged with the first end of the support member. By rotating the nut, the pressing portion presses against the outer side of the outer formwork, thereby tightly fitting the outer formwork to the outer side of the already cast first exterior wall.

[0072] i. Repeat steps d to h to construct the first exterior wall 7 of the first floor structure 1 layer by layer from bottom to top.

[0073] In this way, the above steps are repeated to cast the first exterior wall of the first floor structure of the high building layer by layer from bottom to top, and the second exterior wall of the second floor structure of the low building is cast in staggered layers.

[0074] The present invention provides a staggered-layer construction method for walls at the junction of high and low buildings without external frames. While ensuring that there is at least one floor difference in height between the high and low buildings on both sides of the expansion joint and that there is no external frame protection, a temporary edge protection structure in the form of a steel mesh is formed by raising the vertical steel bars on the steel structure of the first exterior wall of the current construction floor of the high building and tying the lower steel structure of the first exterior wall of the next construction floor in advance. On the other hand, safety frames are set up at both ends of the expansion joint and suspended cables are tied, so that construction workers on the operating platform on the external formwork can tie safety ropes to ensure the safety of construction workers on the operating platform at high altitude. Guardrails and other measures are provided on the outer edge of the operating platform to ensure the safety of high-side edge operations. The present invention provides a staggered-layer construction method for walls at the junction of high and low buildings without external frames to ensure the safety of construction of the exterior wall at the expansion joint of the high building through multiple safety protection measures, so that the personal safety of construction workers is guaranteed.

[0075] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A method for staggered construction of walls at adjacent high and low buildings without external scaffolding, characterized in that: The following steps are involved: a. staggered construction of the first floor structure of the taller building and the second floor structure of the lower building, so that the construction floor of the first floor structure is higher than the construction floor of the second floor structure. During the construction of the first floor structure, the reinforcement structure of the first exterior wall of the first floor structure near the expansion joint is tied together, and inner and outer formwork are erected on opposite sides of the reinforcement structure of the first exterior wall, so that the inner formwork is tied to the outer formwork, and the vertical main reinforcement of the reinforcement structure of the first exterior wall extends to the first exterior wall position of the next construction floor; b. Installing safety frames at opposite ends of the first exterior wall; c. Tie a suspension rope between the two safety frames; d. Install an operating platform on the upper part of the outer template, and install a guardrail on the outer edge of the operating platform; e. On the operating platform, the construction workers are connected to the suspension cable by a safety rope and tie the upper end of the vertical main reinforcement to the lower layer of the first outer wall of the next construction floor as a temporary edge protection structure; f. Casting the first exterior wall of the construction floor of the first floor structure in the inner and outer formwork; g. tying the upper layer steel bar structure onto the lower layer steel bar structure to form the steel bar structure of the next construction floor; h. Installing a plurality of supporting members on the cast first exterior wall, and setting up inner and outer formwork on the plurality of supporting members, so that the steel structure of the next construction floor is set in the inner and outer formwork; i. Repeat steps d to h to construct the first exterior wall of the first floor structure layer by layer from bottom to top.

2. The staggered construction method for walls at adjacent high and low buildings without external scaffolding according to claim 1 is characterized in that: A wall sleeve is pre-embedded in the first exterior wall. The support member has a first end and a second end opposite to each other. The first end of the support member is inserted into the wall sleeve, and the second end is supported by the exterior template.

3. The staggered construction method for walls at adjacent high and low buildings without external scaffolding according to claim 2 is characterized in that: The second end of the support member is bent upward to form a pressing portion, and the pressing portion presses against the outer side of the outer template.

4. The staggered construction method for walls at adjacent high and low buildings without external scaffolding according to claim 2 is characterized in that: A limiting member is adjustably mounted on the first end of the support member, and the limiting member presses against the outer side of the inner template.

5. The staggered construction method for walls at adjacent high and low buildings without external scaffolding according to claim 1 is characterized in that: The lower steel bar structure is formed with a notch, and a protective grille for sealing the notch is detachably installed at the notch.

6. The staggered construction method for walls at adjacent high and low buildings without external scaffolding according to claim 1 is characterized in that: The outer formwork comprises a plurality of metal unit plates spliced together.

7. The staggered construction method for walls at the junction of high and low buildings without external scaffolding according to claim 6 is characterized in that: The uppermost metal unit plate is provided with lifting lugs.

8. The staggered construction method for walls at adjacent high and low buildings without external scaffolding according to claim 1 is characterized in that: The upper portion of the outer side of the outer template is connected with a support frame, the top of the support frame is paved with a pedal, and the guardrail is installed on the outer edge of the top of the support frame.

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