Device and method for dismantling bearing wall of existing masonry structure

Abstract

The invention discloses a device and method for dismantling a load bearing wall of an existing masonry structure, and relates to the technical field of civil construction, the device comprises stand columns, vertical supporting rods and horizontal connecting rods, and the stand columns are arranged in holes formed in the two sides of the load bearing wall to be dismantled; the multiple vertical supporting rods are arranged in holes formed in the top of the bearing wall to be dismantled, wedge blocks are arranged at the tops of the vertical supporting rods, and the wedge blocks are used for enabling loads of the upper wall to fall onto the stand columns and the vertical supporting rods; the horizontal connecting rods are connected between the stand columns and the vertical supporting rods and between the adjacent vertical supporting rods, so that the stand columns, the vertical supporting rods and the horizontal connecting rods form an overall stress truss system. Loads borne by the to-be-dismantled bearing wall are all transferred to be borne by the vertical supports, no newly-added loads exist on the surrounding wall bodies, and the safety of the non-dismantled wall bodies can be effectively guaranteed; the installation process is simple, and construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering and construction, and in particular to a device and method for removing a load-bearing wall of an existing masonry structure. Background Art

[0002] At present, the traditional construction method for demolishing load-bearing walls of existing masonry structures is to reinforce them by pouring concrete beams after unloading the main structure support. In this method, the unloading construction of the main support is troublesome and occupies a lot of space; and the later pouring of concrete beams generates a lot of wet work on site, the construction period is long, and safety is difficult to guarantee during construction; if only concrete beams are added, the load borne by the load-bearing walls to be demolished will eventually be borne by the surrounding walls that have not been demolished, and the safety of the surrounding walls cannot be guaranteed.

[0003] For example: Chinese invention patent CN103711327A discloses a method for reinforcing a joist when the lower part of a masonry load-bearing wall is demolished. The method comprises the following steps: a circular hole is first chiseled in the wall, a scaffolding steel pipe is passed through the circular hole, and temporary scaffolds are respectively set up on the front and rear sides of the load-bearing wall to be demolished, and the scaffolding steel pipe forms a part of the upper wall load-bearing system; a wall groove is then chiseled above the load-bearing wall to be demolished, components are arranged, components are fixed, and components are pressed against the top surface of the wall groove to form a temporary joist, which becomes another part of the upper wall load-bearing system; this scheme requires the scaffolding to be set up on both sides of the wall to unload the load. , construction is troublesome, and it takes up space; Chinese invention patent CN118461934A discloses a support member and construction method for demolishing and underpinning a masonry structure wall, a plurality of openings are chiseled on the top of the load-bearing wall to be demolished, and support members are placed in the plurality of openings; a portion of the wall extending in the horizontal direction of the support member is chiseled off to form an accommodation space, and the two ends of the accommodation space are respectively extended to the walls on both sides of the load-bearing wall to be demolished; a template is set after tying steel bars in the accommodation space; concrete is poured into the accommodation space to form an underpinning beam; this scheme adopts pouring concrete beams, which has a long period of time and is difficult to ensure safety during construction.

[0004] In addition, the above solutions are only provided with horizontal beams, and the loads borne by the original load-bearing walls are distributed to the surrounding walls through the horizontal beams, and the safety of the surrounding walls cannot be guaranteed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a device and method for dismantling load-bearing walls of an existing masonry structure, wherein the load borne by the load-bearing wall to be dismantled is transferred to the vertical support, and there is no additional load on the surrounding walls, thereby effectively ensuring the safety of the walls that have not been dismantled; the installation process is simple, and the construction efficiency is improved.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a device for removing a load-bearing wall of an existing masonry structure, comprising:

[0008] Columns are set in the holes opened on both sides of the load-bearing wall to be demolished;

[0009] A plurality of vertical support rods are arranged in holes opened at the top of the load-bearing wall to be demolished, and wedges are arranged at the top of the vertical support rods, and the wedges are used to make the upper wall load fall to the columns and the vertical support rods;

[0010] The horizontal connecting rod is connected between the column and the vertical supporting rod and the adjacent vertical supporting rods, so that the column, the vertical supporting rod and the horizontal connecting rod constitute an integral force-bearing truss system.

[0011] As a further implementation, the horizontal connecting rod is at least arranged at the top end and the bottom end of the vertical supporting rod.

[0012] As a further implementation, the vertical support rods are evenly distributed, the height of the vertical support rods is 300 mm to 800 mm, and the spacing between the vertical support rods is 400 mm to 700 mm.

[0013] As a further implementation manner, the height of the column is the same as the height of the load-bearing wall to be demolished.

[0014] As a further implementation, a horizontally arranged local reinforcement plate is connected to the intersection of the column and the horizontal connecting rod.

[0015] As a further implementation, the columns, vertical support rods, horizontal connecting rods and wedges are made of steel.

[0016] In a second aspect, an embodiment of the present invention further provides a method for removing a load-bearing wall of an existing masonry structure, using the device, comprising:

[0017] Open holes on both sides of the load-bearing wall to be demolished and put in columns; open holes on the top of the load-bearing wall to be demolished and put in vertical support rods;

[0018] Knock wedges into the top of the vertical support rods to tighten the upper wall, so that the upper wall load falls entirely on the columns and vertical support rods;

[0019] Holes are dug in the part of the load-bearing wall to be demolished and horizontal connecting rods are placed, and the columns, vertical support rods and horizontal connecting rods are welded to form an integral load-bearing truss system;

[0020] The load-bearing wall to be demolished is removed by static cutting method.

[0021] As a further implementation method, the centroid of the overall load-bearing truss system coincides with the centroid of the load-bearing wall to be demolished.

[0022] As a further implementation method, the columns, vertical support rods and horizontal connecting rods are connected together by welding; after welding, a wedge block is knocked in between the middle position of the horizontal connecting rod and the upper wall to tighten it.

[0023] As a further implementation method, before placing the columns and vertical support rods, the top of the load-bearing wall to be demolished is pre-positioned according to the placement positions of the columns and vertical support rods;

[0024] Before placing the horizontal connecting rods, lay out the lines and position the horizontal connecting rods at the top of the load-bearing wall to be demolished.

[0025] The beneficial effects of the present invention are as follows:

[0026] (1) The columns, vertical support rods and horizontal connecting rods of the present invention are connected to form an integral load-bearing truss system. The load borne by the original load-bearing wall is transferred to the columns through the trusses composed of vertical support rods and horizontal connecting rods, and the columns then transfer the load to the next layer of walls. The load transfer path is transferred from the original load-bearing wall to the horizontal truss (assembled by the horizontal connecting rods and the vertical support rods) and the columns. The load transfer path is clear, and the load-bearing of the walls around the load-bearing wall to be demolished does not change at all, which can effectively ensure the safety of the walls that have not been demolished.

[0027] (2) The present invention is made of steel structure, and there is no wet operation in the entire construction process, which shortens the construction period and avoids the risk of wet operation in traditional wall demolition. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0029] Figure 1 is a schematic diagram of the structure of the present invention according to one or more embodiments;

[0030] Figure 2 yes Figure 1 AA section diagram;

[0031] Figure 3 yes Figure 1 BB section diagram;

[0032] Figure 4 is a schematic diagram of a vertical support rod structure according to one or more embodiments of the present invention;

[0033] Figure 5 Schematic diagram of a wedge structure according to one or more embodiments of the present invention.

[0034] Among them, 1. columns, 2. horizontal connecting rods, 3. vertical supporting rods, 31. rod bodies, 32. end plates, 4. wedge blocks, 5. local reinforcement plates, 6. load-bearing walls to be demolished. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0036] Embodiment 1:

[0037] This embodiment provides a device for removing a load-bearing wall of an existing masonry structure, such as Figure 1-Figure 3 As shown, it includes columns 1, horizontal connecting rods 2, and vertical supporting rods 3. The columns 1, horizontal connecting rods 2 and vertical supporting rods 3 are connected to form an overall load-bearing truss system.

[0038] Specifically, Figure 1 As shown, holes are provided on both sides of the load-bearing wall 6 to be demolished for placing columns 1, and the height of the columns 1 is the same as the height of the load-bearing wall 6 to be demolished. Holes are provided on the top of the load-bearing wall 6 to be demolished for placing vertical support rods 3, and the height of the vertical support rods 3 is determined according to the span of the top of the load-bearing wall 6 to be demolished, and is 300mm to 800mm; multiple vertical support rods 3 are evenly distributed in the span direction of the load-bearing wall 6 to be demolished, and the spacing between adjacent vertical support rods 3 is 400mm to 700mm; through the above arrangement, effective support for the upper wall is formed.

[0039] A wedge 4 is driven in between the top of the vertical support rod 3 and the gap between the upper wall to ensure that the load of the upper wall falls entirely on the column 1 and the vertical support rod 3. The column 1 and the vertical support rod 3 are independent vertical rods that bear the load of the upper wall and transfer the load to the lower wall in the vertical direction. Through these two types of components, no additional main unloading device (for example, scaffolding on both sides of the wall) is required during the wall demolition process, which simplifies the construction and does not occupy additional space.

[0040] like Figure 4 As shown, the vertical support rod 3 includes a rod body 31, and both ends of the rod body 31 are connected to end plates 32 respectively. The end plates 32 increase the contact area and ensure that the wedge block 4 can be knocked in smoothly. Figure 5 As shown, two wedge blocks 4 are arranged in pairs on the top end plate 32 of each vertical support rod 3, and the two wedge blocks 4 are butt-jointed to form a block structure.

[0041] Holes are dug in the load-bearing wall 6 to be demolished to place horizontal connecting rods 2, and horizontal connecting rods 2 are provided between the vertical support rods 3 and the columns 1, and between adjacent vertical support rods 3; in this embodiment, horizontal connecting rods 2 are provided at the top and bottom of the vertical support rods 3, respectively, and the columns 1, vertical support rods 3 and horizontal connecting rods 2 are welded and connected to form an integral force-bearing truss system. At this time, the load borne by the original load-bearing wall is transferred to the column 1 through the truss composed of the vertical support rods 3 and the horizontal connecting rods 2, and the column 1 then transfers the load to the next layer of the wall; the load transfer path is transferred from the original load-bearing wall to the horizontal truss (the horizontal connecting rods 2 and the vertical support rods 3 are assembled) and the column 1, the load transfer path is clear, and the load-bearing of the walls around the load-bearing wall 6 to be demolished does not change at all.

[0042] It is understandable that in other embodiments, a horizontal connecting rod 2 may be added at the middle section of the vertical support rod 3, and the arrangement may be specifically based on the upper wall load requirements.

[0043] like Figure 1 As shown, a horizontally arranged local reinforcement plate 5 is connected to the intersection of the column 1 and the horizontal connecting rod 2 to increase the connection strength between the column 1 and the horizontal connecting rod 2.

[0044] In this embodiment, the column 1, the vertical support rod 3, the horizontal connecting rod 2 and the wedge block 4 are made of steel materials, such as carbon structural steel or low-alloy high-strength steel.

[0045] The force transmission of the device of this embodiment is clear, and no additional load is added to the wall around the load-bearing wall 6 to be demolished; the installation process of the entire device does not involve any wet work, and all of it is the assembly of steel structure components, which is simple to construct, saves construction time, and can ensure safety during the construction process.

[0046] Embodiment 2:

[0047] This embodiment provides a method for removing a load-bearing wall of an existing masonry structure, using the device described in Embodiment 1, and comprising the following steps:

[0048] Step 1: According to the height and span of the load-bearing wall 6 to be demolished, according to the design drawings, the columns 1, vertical support rods 3 and horizontal connecting rods 2 are processed in the factory. The material of the rods can be Q235B, and the welds of the processed components can be welded by cutaway welding. The size deviation between the components and the on-site measurement is controlled within ±5mm. After the components are processed, anti-corrosion and fireproof treatment are carried out according to environmental conditions.

[0049] Step 2: At the top of the load-bearing wall 6 to be demolished, accurately lay out and position the columns 1 and the vertical support rods 3, and remove the wall at the laid-out position by static cutting.

[0050] Step 3: Place the column 1 and the vertical support rod 3 at the position of the load-bearing wall 6 to be demolished, ensure that the centroid of the vertical support structure formed by the column 1 and the vertical support rod 3 coincides with the centroid of the load-bearing wall 6 to be demolished, and ensure that the column 1 and the vertical support rod 3 are vertical. If the column 1 and the vertical support rod 3 are tilted, the verticality can be adjusted by using the bottom mortar of the rod, steel plate pads, etc. After the column 1 and the vertical support rod 3 are installed, the wedge block 4 is knocked into the top to tighten. At this time, the column 1 and the vertical support rod 3 are each independent vertical force-bearing rods, which bear the load of the upper wall and transfer the load to the lower load-bearing wall 6 to be demolished in the vertical direction.

[0051] Step 4: At the top of the load-bearing wall 6 to be demolished, accurately lay out and position the wall according to the placement of the horizontal connecting rod 2, and remove the wall at the laid-out position by static cutting.

[0052] Step 5: Place the horizontal connecting rod 2 at the location where the wall is to be demolished, ensuring that the centroid of the horizontal connecting structure formed by the horizontal connecting rod 2 coincides with the centroid of the load-bearing wall to be demolished.

[0053] Step 6: Use welding to weld the columns 1, vertical support rods 3 and horizontal connecting rods 2 together. The welding can be done by circumferential welding or single-sided cut welding, and the quality of the weld construction must be guaranteed. After welding is completed, knock the wedge block 4 between the middle position of the horizontal connecting rod 2 and the upper wall to tighten it. At this time, the device for dismantling and reinforcing the wall of the assembled masonry structure is fully installed. The columns 1, vertical support rods 3 and horizontal connecting rods 2 form an integral force-bearing truss system. The load of the upper wall is transferred to the horizontal connecting rod 2 through the vertical support rod 3, and the horizontal connecting rod 2 then transfers the load to the columns 1, completing the unloading of the lower load-bearing wall 6 to be demolished.

[0054] Step 7: Use static cutting method to remove the load-bearing wall 6 to be removed.

[0055] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for removing a load-bearing wall from an existing masonry structure, characterized in that: include: Columns are set in the holes opened on both sides of the load-bearing wall to be demolished; A plurality of vertical support rods are arranged in holes opened at the top of the load-bearing wall to be demolished, and wedges are arranged at the top of the vertical support rods, and the wedges are used to make the upper wall load fall to the columns and the vertical support rods; The horizontal connecting rod is connected between the column and the vertical supporting rod and the adjacent vertical supporting rods, so that the column, the vertical supporting rod and the horizontal connecting rod constitute an integral force-bearing truss system.

2. A device for removing a load-bearing wall from an existing masonry structure according to claim 1, characterized in that: The horizontal connecting rod is at least arranged at the top end and the bottom end of the vertical supporting rod.

3. The device for removing a load-bearing wall of an existing masonry structure according to claim 1, characterized in that: The vertical support rods are evenly distributed, the height of the vertical support rods is 300mm-800mm, and the spacing between the vertical support rods is 400mm-700mm.

4. The device for removing a load-bearing wall of an existing masonry structure according to claim 1, characterized in that: The height of the column is the same as the height of the load-bearing wall to be demolished.

5. The device for removing a load-bearing wall of an existing masonry structure according to claim 1, characterized in that: The intersection of the upright column and the horizontal connecting rod is connected with a horizontally arranged local reinforcement plate.

6. The device for removing a load-bearing wall of an existing masonry structure according to claim 1, characterized in that: The upright columns, vertical support rods, horizontal connecting rods and wedges are made of steel.

7. A method for removing a load-bearing wall from an existing masonry structure, characterized in that: The device according to any one of claims 1 to 6 comprises: Open holes on both sides of the load-bearing wall to be demolished and put in columns; open holes on the top of the load-bearing wall to be demolished and put in vertical support rods; Knock wedges into the top of the vertical support rods to tighten the upper wall, so that the upper wall load falls entirely on the columns and vertical support rods; Holes are dug in the part of the load-bearing wall to be demolished and horizontal connecting rods are placed, and the columns, vertical support rods and horizontal connecting rods are welded to form an integral load-bearing truss system; The load-bearing wall to be demolished is removed by static cutting method.

8. A method for removing a load-bearing wall from an existing masonry structure according to claim 7, characterized in that: The centroid of the overall load-bearing truss system coincides with the centroid of the load-bearing wall to be demolished.

9. A method for removing a load-bearing wall from an existing masonry structure according to claim 7, characterized in that: The columns, vertical support rods and horizontal connecting rods are connected together by welding; after welding, wedges are knocked in between the middle position of the horizontal connecting rod and the upper wall to tighten it.

10. A method for removing a load-bearing wall from an existing masonry structure according to claim 7, characterized in that: Before placing the columns and vertical support rods, lay out the lines and position the columns and vertical support rods at the top of the load-bearing wall to be demolished; Before placing the horizontal connecting rods, lay out the lines and position the horizontal connecting rods at the top of the load-bearing wall to be demolished.

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