A construction method for renovating and installing an indoor elevator shaft

Abstract

This application relates to a construction method for retrofitting an indoor elevator shaft, comprising the following steps: marking the area of ​​the elevator shaft to be demolished on the floor; marking the positions of support columns on the floor and constructing support column holes, the holes being located at the four corners of the area to be demolished; vertically installing support columns in the holes; demolishing the floor in the area to be demolished; setting up a work platform; constructing the elevator shaft; and dismantling the work platform. This method provides a stable support structure, facilitates installation, and can be used for structural reinforcement both before and after demolition.

Description

Technical Field

[0001] The present application relates to the field of elevator shaft installation and construction, and in particular to a construction method for modifying and installing an indoor elevator shaft. Background Art

[0002] Old residential communities and office buildings often lack elevators due to original planning and design. With the advancement of society, elevators are increasingly being installed in renovations of older buildings. Elevators can be installed indoors or outdoors. When installing an indoor elevator, the floor, columns, or other structures in the elevator shaft area must be removed to create a vertically connected elevator shaft.

[0003] The method generally used by staff is to mark the demolition area on the surface and directly use demolition equipment to demolish the interior of the area. Regarding the above-mentioned related technologies, the inventors found that there are great risks and the damage to the original structure is relatively large, especially the structure of the adjacent area of ​​the demolition area is prone to cracks and other damage. Summary of the Invention

[0004] In order to reduce damage to areas adjacent to the demolished area during elevator shaft construction, the present application provides a construction method for modifying and installing an indoor elevator shaft.

[0005] This application provides a construction method for renovating an indoor elevator shaft and installing an elevator shaft using the following technical solutions:

[0006] A construction method for renovating an indoor elevator shaft and installing a new one, comprising the following steps:

[0007] Mark the area of ​​the elevator shaft to be demolished on the floor;

[0008] Mark the positions of the support columns on the floor slab and construct support column holes, wherein the support column holes are located at the four corners of the area to be demolished in the elevator shaft;

[0009] Install the support column vertically in the support column hole;

[0010] Demolish the floor slabs in the area to be demolished;

[0011] Setting up a working platform;

[0012] Construction of elevator shafts;

[0013] Dismantle the work platform.

[0014] By adopting the above technical solution, by setting support columns around the demolition area before demolishing the floor slab, the floor slab outside the demolition area is supported and reinforced when the floor slab is demolished, and the vibration generated by the floor slab during demolition is cushioned, making it less likely for the floor slab to suffer other damages and cracks. After the elevator shaft is built, the entire elevator shaft can continue to be reinforced, making the structure between the elevator shaft and the floor slab more stable and safer.

[0015] Optionally, in the step of installing the support columns, the support columns are connected to the first floor slab by welding steel plate bolts.

[0016] By adopting the above technical solution, the support column and the first floor plate

[0017] Optionally, the support columns are made of H-shaped steel or square box steel.

[0018] By adopting the above technical solution, the structure and material stability of the H-shaped steel or square box-shaped steel are strong, and a more stable supporting force can be provided during support.

[0019] Optionally, in the step of installing the support columns, the support columns are tied to the floor slabs with steel bars and grouting is performed in the gaps.

[0020] By adopting the above technical solution, the support column 1 and the floor slab are fixed, so that the support column and the floor slab are better matched, and the supporting and reinforcing effect of the support column on the floor slab is enhanced.

[0021] Optionally, the method further includes the following steps: installing steel beams between adjacent support columns.

[0022] By adopting the above technical solution and installing steel beams, the support columns are fixedly supported by each other, thereby further strengthening the support columns and making the structure more stable.

[0023] Optionally, the inner side of the steel beam is located in the area to be demolished. After the floor slab is demolished, the following steps are also included: casting a hidden beam connected to the floor slab on the upper side of the steel beam.

[0024] By adopting the above technical solution and setting up hidden beams, it is possible to wrap the edges of the broken area of ​​the floor slab, and also to support and reinforce the area around the elevator shaft after the elevator shaft is constructed.

[0025] Optionally, the method further includes the following steps: installing supporting angle steels on the supporting columns, wherein the right-angled sides of the supporting angle steels abut against the lower side of the floor slab.

[0026] By adopting the above technical solution, the connection between the support column and the floor slab is made more stable through the support of the angle steel, thereby further enhancing the supporting stability of the support column.

[0027] Optionally, reinforcing square tubes are further provided between adjacent supporting angle steels and the floor slab.

[0028] By adopting the above technical solution, the contact area between the support angle and the floor slab is increased by reinforcing the square tube, which can not only increase the supporting area of ​​the support column on the floor slab, but also reduce the pressure of the interaction during support, thereby further improving the buffering and reinforcement effects.

[0029] Optionally, the steel beam is made of H-shaped steel, and the steps further include: installing a support plate on the lower wing plate of the steel beam; and installing the working platform on the support plate when setting up the working platform.

[0030] By adopting the above technical solution, the working platform is installed through the support plate. The installation structure is simple and stable, which is convenient for construction operation. The installed working platform can be stably supported, which improves the safety factor during construction.

[0031] Optionally, in the step of dismantling the work platform, the dismantling order is from the upper layer to the lower layer.

[0032] By adopting the above technical solution, when the upper layer is broken, the lower layer can receive the fragments dropped from the upper layer if it is intact, thereby avoiding safety accidents as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a flowchart of Example 1 of the present application;

[0034] Figure 2 This is a schematic diagram showing the structure of the elevator shaft during construction in Example 1 of the present application;

[0035] Figure 3 is a cross-sectional view showing the construction of the elevator shaft in Example 1 of the present application;

[0036] Figure 4 This is a flowchart of Example 2 of the present application;

[0037] Figure 5 This is a schematic diagram showing the structure of the elevator shaft during construction in Example 2 of the present application;

[0038] Figure 6 It is a cross-sectional view showing the construction of the elevator shaft in Example 2 of the present application.

[0039] Explanation of the accompanying reference numerals: 1. Support column; 11. Support angle steel; 12. Reinforced square tube; 2. Steel beam; 21. Support plate; 22. Reinforced diagonal rod; 3. Hidden beam; 4. Working platform; 41. Fence. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-6 This application is described in further detail.

[0041] The embodiment of the present application discloses a construction method for modifying and installing an indoor elevator shaft.

[0042] Example 1

[0043] Reference Figure 1 The construction method for renovating an indoor elevator shaft and installing a new one includes the following steps:

[0044] S100: Mark the area of ​​the elevator shaft to be demolished on the floor slab, and mark the position of the support column 1 on the floor slab. Preferably, the elevator shaft area is selected between or near the original structural beams of the floor slab, so that it can be supported by the original structural beams when demolishing the floor slab.

[0045] S200: Breaking the position of the support column 1 to form a through hole for the support column 1 to pass through. In this embodiment, the support column 1 is a square column that is easy to install.

[0046] S300: Install support column 1. The first-floor support column 1 is vertically fixed to the first-floor slab by welding steel plates and bolting. Rebar is tied between the support column 1 and the floor slab, and grouting is performed in the gap between the support column 1 and the floor slab.

[0047] Thereby, the support column 1 is fixed to the floor slab, so that when the floor slab is broken, the floor slab outside the broken area is supported and reinforced, and the vibration generated by the floor slab when broken is cushioned, making it less likely for the floor slab to suffer other damages and cracks. After the elevator shaft is built, the entire elevator shaft can continue to be reinforced, making the structure between the elevator shaft and the floor slab more stable and safe.

[0048] The upper part of each support column 1 above the first floor passes through the floor slab and extends upward by at least 50 cm, and then the adjacent support columns 1 are connected. In this embodiment, welding is adopted; the support columns can be square box-shaped or H-shaped steel. In this embodiment, square box-shaped steel columns are adopted.

[0049] S400: Install steel beam 2, and weld steel beam 2 between two adjacent support columns 1 on the lower side of each floor slab; Beam 2; In this embodiment, the steel beam 2 adopts H-shaped steel, and can also adopt steel beam structures such as square steel pipes.

[0050] By installing the steel beams 2, the support columns 1 are fixedly supported by each other, thereby further strengthening the support columns 1 and making the structure more stable.

[0051] S500: Welding a supporting angle steel 11 on the supporting column 1; in this embodiment, the upper side of the angle steel 11 is in contact with the bottom surface of the floor slab for support, and two angle steels 11 are provided on each supporting column 1 corresponding to each floor slab, both facing away from the area to be broken of the floor slab; through the support of the angle steel 11, the connection between the supporting column 1 and the floor slab is more stable, thereby further enhancing the supporting stability of the supporting column 1.

[0052] Reference Figure 1 、 Figure 3 :

[0053] S600: demolish the floor slab in the area to be demolished; demolish the floor slab demolition area until the projection reveals the steel beam 2.

[0054] S700: Concealed beam 3 connected to the floor slab is cast on the upper side of steel beam 2. Before casting concealed beam 3, bolts are fixed from bottom to top on the upper flange of steel beam 2. The bolts are tied and connected to the steel bars at the edge of the broken area of ​​the floor slab. Then, concealed beam 3 connected to the floor slab is cast on the upper side of steel beam 2.

[0055] By setting the hidden beam 3, the edge of the broken area of ​​the floor slab can be wrapped, and the area around the elevator shaft can be supported and reinforced after the elevator shaft is constructed.

[0056] S800: Weld support plates 21 to the lower flanges of adjacent steel beams 2, and set up a work platform 4 on the support plates 21. In this embodiment, the support plates 21 are in the shape of a right triangle, with the two right-angled sides of the support plates 21 being parallel to the webs of the corresponding two steel beams 2 and being arranged as close to the webs as possible.

[0057] A working platform 4 is set up, with the four corners of the working platform 4 correspondingly placed on four supporting plates 21 and temporarily fixed. A fence 41 is set around the working platform 4, and a space for constructing the elevator shaft is set between the fence 41 and the edge of the floor.

[0058] Alternatively, step S800 may be performed first, and after the working platform 4 is erected, the concealed beam 3 may be cast on the working platform 4 .

[0059] S900: Construction elevator shaft.

[0060] S010: Dismantle the working platform 4 from top to bottom; when the upper layer is removed, the lower layer can receive the broken pieces dropped from the upper layer if it is intact.

[0061] Example 2

[0062] Reference Figure 4 、 Figure 5 , the difference between this embodiment and embodiment 1 is: step S400 is replaced by step S401, and step S500 is replaced by step S501;

[0063] Step S401: Install the steel beam 2, weld the steel beam 2 between two adjacent support columns 1 on the lower side of each floor slab, and weld the reinforcing diagonal rod 22 between the adjacent steel beams 2 and support columns 1;

[0064] By providing the reinforcing diagonal rods 22 , the steel beam 2 and the support column 1 are triangularly reinforced for stability, thereby further improving the structural stability between the steel beam 2 and the support column 1 , thereby further enhancing the supporting strength of the support column 1 .

[0065] Step S501: welding the support angle steel 11 to the support column 1, and installing the reinforcing square tube 12 between the support angle steel 11 and the floor slab;

[0066] By reinforcing the square tube 12, the contact area between the supporting angle steel 11 and the floor slab is increased, which can not only increase the supporting area of ​​the supporting column 1 on the floor slab, but also reduce the interaction pressure during support, thereby further improving the buffering and reinforcement effects.

[0067] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A construction method for retrofitting an indoor elevator shaft, characterized by: The following steps are involved: Mark the area of ​​the elevator shaft to be demolished on the floor; Marking the positions of support columns (1) on the floor slab and constructing support column holes, wherein the support column holes are located at the four corners of the area to be demolished in the elevator shaft; Vertically installing the support column (1) in the support column hole: tying the support column (1) to the floor slab and connecting the steel bars and grouting the gap; Installing the steel beam (2): welding the steel beam (2) between two adjacent support columns (1) on the lower side of each floor slab, wherein the inner side portion of the steel beam (2) is located in the area to be demolished; The floor slab in the area to be demolished is demolished, and after the floor slab is demolished, a hidden beam (3) connected to the floor slab is cast on the upper side of the steel beam (2); Setting up the working platform: installing a support plate (21) on the lower wing plate of the steel beam (2); when setting up the working platform, installing the working platform on the support plate (21); Construction of elevator shafts; Dismantle the work platform.

2. The construction method for retrofitting an indoor elevator shaft according to claim 1, characterized in that: In the step of installing the support column (1), the support column (1) is connected to the first floor plate by welding steel plate bolts.

3. The construction method for retrofitting an indoor elevator shaft according to claim 1, characterized in that: The support column (1) is made of H-shaped steel or square box steel.

4. The construction method for retrofitting an indoor elevator shaft according to claim 1, characterized in that: The following steps are also included: A supporting angle steel (11) is installed on the supporting column (1), and the right-angle side of the supporting angle steel (11) abuts against the lower side of the floor slab.

5. The construction method for retrofitting an indoor elevator shaft according to claim 4, characterized in that: A reinforcing square tube (12) is further provided between the adjacent supporting angle steels (11) and the floor slab.

6. The construction method for retrofitting an indoor elevator shaft according to claim 3, characterized in that: The steel beam (2) is made of H-shaped steel.

7. The construction method for retrofitting an indoor elevator shaft according to claim 1, characterized in that: In the step of dismantling the work platform, the dismantling order is from the upper layer to the lower layer.

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