A device and method for dismantling load-bearing walls of existing masonry structures

Abstract

The application discloses a device and method for dismantling bearing wall of existing masonry structure, and relates to the technical field of civil construction, which comprises a stand column, a vertical support rod and a horizontal connecting rod. The stand column is arranged in the hole formed on the two sides of the bearing wall to be dismantled. A plurality of vertical support rods are arranged in the hole formed on the top of the bearing wall to be dismantled, and a wedge is arranged on the top of the vertical support rod. The wedge is used for making the upper wall load fall to the stand column and the vertical support rod. The horizontal connecting rod is connected between the stand column and the vertical support rod and the adjacent vertical support rods, so that the stand column, the vertical support rod and the horizontal connecting rod form an integral force truss system. The load borne by the bearing wall to be dismantled is transferred to the vertical support rod, and there is no new load on the surrounding wall, so that the safety of the undismantled wall can be effectively ensured. The installation process is simple, and the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of civil construction technology, and in particular to a device and method for demolishing a bearing wall of an existing masonry structure. BACKGROUND

[0002] The current traditional construction method for demolishing a bearing wall of an existing masonry structure is to reinforce the cast-in-place concrete beam after unloading the support of the main structure. This method is cumbersome to perform the main support unloading construction and occupies a large amount of space. The cast-in-place concrete beam generates a large amount of wet work on site in the later stage, the construction period is long, and the safety during construction cannot be guaranteed. Only the concrete beam is increased, and the load borne by the bearing wall to be demolished is ultimately borne by the surrounding walls, and the safety of the surrounding walls cannot be guaranteed.

[0003] For example, Chinese invention patent CN103711327A discloses a method for reinforcing a beam when the lower part of a masonry bearing wall is demolished. A circular hole is first drilled in the wall, a scaffold steel pipe is inserted into the circular hole, and temporary scaffolds are erected on the front and back sides of the bearing wall to be demolished, forming part of the load sharing system of the upper wall. A wall groove is then drilled above the bearing wall to be demolished, and a temporary beam is formed by arranging the components, fixing the components, and tightening the components against the top surface of the wall groove, thereby forming another part of the load sharing system of the upper wall. This scheme needs to erect scaffolds on both sides of the wall to unload, which is cumbersome and occupies space. Chinese invention patent CN118461934A discloses a support for masonry structure wall demolition and construction method. Multiple holes are drilled in the top of the bearing wall to be demolished, and support members are inserted into the holes. The part of the wall extending in the horizontal direction of the support members is drilled to form a containing space, and the two ends of the containing space extend to the walls on both sides of the bearing wall to be demolished. Steel bars are bound and forms are set in the containing space. Concrete is poured into the containing space to form a replacement beam. This scheme uses a cast-in-place concrete beam, which has a long cycle and the safety during construction cannot be guaranteed.

[0004] In addition, the above-mentioned schemes only have horizontal beams, and the load borne by the original bearing wall is distributed to the surrounding walls through the horizontal beams, and the safety of the surrounding walls cannot be guaranteed. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application aims to provide a device and method for demolishing a bearing wall of an existing masonry structure, which transfers the load borne by the bearing wall to be demolished to vertical supports, and the surrounding walls do not have additional loads, which can effectively ensure the safety of the walls that are not demolished. The installation process is simple, and the construction efficiency is improved.

[0006] To achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

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

[0008] a column arranged in a hole formed on both sides of the load-bearing wall to be removed;

[0009] a plurality of vertical support rods arranged in holes formed on the top of the load-bearing wall to be removed, and a wedge arranged on the top of the vertical support rods, the wedge being used to make the upper wall load fall on the column and the vertical support rods;

[0010] a horizontal connecting rod connected between the column and the vertical support rods and adjacent vertical support rods, so that the column, the vertical support rods and the horizontal connecting rod form an integral force truss system.

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

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

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

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

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

[0016] In a second aspect, embodiments of the present application also provide a method for removing a load-bearing wall of an existing masonry structure, which adopts the device, comprising:

[0017] forming holes on both sides of the load-bearing wall to be removed and placing columns in the holes, and forming holes on the top of the load-bearing wall to be removed and placing vertical support rods in the holes;

[0018] knocking a wedge on the top of the vertical support rods to tightly press the upper wall, so that the upper wall load falls on the column and the vertical support rods;

[0019] punching holes in the wall of the load-bearing wall to be removed and placing horizontal connecting rods, and welding the column, the vertical support rods and the horizontal connecting rods to form an integral force truss system;

[0020] removing the load-bearing wall to be removed by using a static cutting method.

[0021] As a further implementation, the centroid of the integral force truss system coincides with the centroid of the load-bearing wall to be removed.

[0022] As a further implementation mode, the column, the vertical support rod and the horizontal connecting rod are connected together by welding; after the welding is completed, the wedge is knocked into the middle position of the horizontal connecting rod and the upper wall body and is tightly knocked.

[0023] As a further implementation mode, before the column and the vertical support rod are placed, the line positioning is performed in advance at the top of the bearing wall to be demolished according to the placement position of the column and the vertical support rod.

[0024] Before the horizontal connecting rod is placed, the line positioning is performed in advance at the top of the bearing wall to be demolished according to the placement position of the horizontal connecting rod.

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

[0026] (1) The column, the vertical support rod and the horizontal connecting rod of the present application are connected to form an integral force truss system, the load borne by the original bearing wall is transmitted to the column through the truss composed of the vertical support rod and the horizontal connecting rod, and the column further transmits the load to the wall of the next layer; the load transmission path is changed from the original bearing wall to the horizontal truss (the horizontal connecting rod and the vertical support rod are assembled) and the column, the load transmission path is clear, and the bearing of the wall around the bearing wall to be demolished does not change, which can effectively ensure the safety of the wall to be demolished.

[0027] (2) The present application is made of steel structure, the whole construction process is free of wet work, the construction period is shortened, and the risk link of the wet work process of the traditional wall demolition is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings accompanying the specification of the present application form a part of the present application and serve to provide further understanding of the present application, the illustrative embodiments of the present application and the explanations thereof serve to explain the present application and do not constitute an improper limitation of the present application.

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

[0030] Figure 2 is an A-A sectional view of Figure 1 ;

[0031] Figure 3 is a B-B sectional view of Figure 1 ;

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

[0033] Figure 5 is a structural schematic diagram of the wedge of the present application according to one or more embodiments.

[0034] Wherein, 1, a column, 2, a horizontal connecting rod, 3, a vertical support rod, 31, a rod body, 32, an end plate, 4, a wedge, 5, a local reinforcing plate, 6, a to-be-demolished load-bearing wall. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0036] Example 1

[0037] This embodiment provides a device for demolishing a load-bearing wall of an existing masonry structure, as shown in the figure, comprising a column 1, a horizontal connecting rod 2, and a vertical support rod 3, which are connected to form an overall force truss system. Figures 1-3

[0038] Specifically, as shown in the figure, holes are provided on both sides of the to-be-demolished load-bearing wall 6 for placing the column 1, and the height of the column 1 is the same as that of the to-be-demolished load-bearing wall 6. Holes are provided at the top of the to-be-demolished load-bearing wall 6 for placing the vertical support rod 3, and the height of the vertical support rod 3 is determined according to the span of the top of the to-be-demolished load-bearing wall 6, which is 300mm-800mm. A plurality of vertical support rods 3 are evenly distributed in the span direction of the to-be-demolished load-bearing wall 6, and the spacing between adjacent vertical support rods 3 is 400mm-700mm. Through the above arrangement, effective support of the upper wall is formed. Figure 1 The wedge 4 is knocked into the gap between the top of the vertical support rod 3 and the upper wall to ensure that the load of the upper wall is entirely borne by the column 1 and the vertical support rod 3. The column 1 and the vertical support rod 3, as independent vertical rods, bear the load of the upper wall and transmit the load to the lower wall along the vertical direction. Through these two types of components, additional main unloading devices (such as scaffolding erected on both sides of the wall) are no longer needed during the wall demolition process, the construction is simple, and no additional space is occupied.

[0039] As shown in the figure, the vertical support rod 3 comprises a rod body 31, and the rod body 31 is connected to an end plate 32 at each end, which increases the contact area and ensures the smooth knocking in of the wedge 4.

[0040] As shown in the figure, two wedges 4 are provided at the top end plate 32 of each vertical support rod 3, and the two wedges 4 are butt-jointed to form a block structure. Figure 4 Figure 5

[0041] ​​​A local hole is dug in the load-bearing wall 6 to be demolished for placing the horizontal connecting rod 2, and the horizontal connecting rod 2 is arranged between the vertical support rod 3 and the stand column 1 and between adjacent vertical support rods 3; in this embodiment, the top end and the bottom end of the vertical support rod 3 are respectively provided with the horizontal connecting rod 2, and the stand column 1, the vertical support rod 3 and the horizontal connecting rod 2 are welded to form an integral force truss system. At this time, the load borne by the original load-bearing wall is transmitted to the stand column 1 through the truss composed of the vertical support rod 3 and the horizontal connecting rod 2, and the stand column 1 further transmits the load to the wall of the next layer; the load transmission path is changed from the original load-bearing wall to the horizontal truss (the horizontal connecting rod 2 and the vertical support rod 3 are assembled) and the stand column 1, the load transmission path is clear, and the load bearing of the wall around the load-bearing wall 6 to be demolished does not change.

[0042] It can be understood that in other embodiments, the horizontal connecting rod 2 can also be added at the middle segment position of the vertical support rod 3, and the specific arrangement is determined according to the load requirement of the upper wall.

[0043] As shown in Figure 1 The intersection of the stand column 1 and the horizontal connecting rod 2 is connected with a locally arranged horizontal reinforcing plate 5, which increases the connection strength of the stand column 1 and the horizontal connecting rod 2.

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

[0045] The device of this embodiment has clear force transmission and does not increase additional load on the wall around the load-bearing wall 6 to be demolished; the entire device is assembled by steel structural members without any wet work, and the construction is simple, saves construction period and ensures safety during construction.

[0046] Embodiment 2:

[0047] The embodiment provides a method for demolishing a load-bearing wall of an existing masonry structure, which adopts the device of embodiment 1 and comprises the following steps:

[0048] Step 1: According to the height and span of the load-bearing wall 6 to be demolished, the stand column 1, the vertical support rod 3 and the horizontal connecting rod 2 are processed according to the design drawing in the factory. The material of the rod can be selected from Q235B, the weld of the processed component can be cut and welded, and the dimensional deviation between the component and the on-site measurement is controlled within ±5mm. After the component is processed, the corrosion and fireproofing treatment is performed according to the environmental conditions.

[0049] Step 2: The stand column 1 and the vertical support rod 3 are accurately positioned by setting out at the top of the load-bearing wall 6 to be demolished, and the wall at the setting-out position is demolished by using 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 removed, ensure that the centroid of the vertical support structure composed of the column 1 and the vertical support rod 3 coincides with the centroid of the load-bearing wall 6 to be removed, 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 inclined, the bottom of the rod can be adjusted vertically by using a slurry seat, a steel plate, etc. After the installation of the column 1 and the vertical support rod 3 is completed, the wedge 4 is knocked into the top to be tightened. At this time, the column 1 and the vertical support rod 3 are each independent vertical force rods, which bear the load of the upper wall and transmit the load to the lower load-bearing wall 6 to be removed along the vertical direction.

[0051] Step 4: Accurately position the horizontal connecting rod 2 at the top of the load-bearing wall 6 to be removed according to the placement position of the horizontal connecting rod 2, and remove the wall at the positioning position by using static cutting.

[0052] Step 5: Place the horizontal connecting rod 2 at the position of the removed wall, and ensure that the centroid of the horizontal connecting structure composed of the horizontal connecting rod 2 coincides with the centroid of the load-bearing wall to be removed.

[0053] Step 6: Weld the column 1, the vertical support rod 3 and the horizontal connecting rod 2 together by welding, which can be performed by surrounding welding or single-face section welding, and the welding quality needs to be ensured. After the welding is completed, the wedge 4 is knocked into the top between the middle position of the horizontal connecting rod 2 and the upper wall, and at this time, the assembly-type masonry structure wall removal and reinforcement device is completely installed. The column 1, the vertical support rod 3 and the horizontal connecting rod 2 form an integral force truss system, the load of the upper wall is transmitted to the horizontal connecting rod 2 through the vertical support rod 3, and the horizontal connecting rod 2 transmits the load to the column 1, thereby completing the unloading of the lower load-bearing wall 6 to be removed.

[0054] Step 7: Remove the load-bearing wall 6 to be removed by using static cutting.

[0055] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. 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 demolishing load-bearing walls in existing masonry structures, characterized in that, include: Columns are holes made on both sides of the load-bearing wall to be demolished; Multiple vertical support rods, each vertical support rod consisting of a rod body with end plates connected to both ends of the rod body; The hole is set in the top of the load-bearing wall to be demolished, and two wedges are set in pairs on the top end plate of the vertical support rod. The two wedges are joined together to form a block structure. The wedges are used to make the load of the upper wall fall to the column and the vertical support rod. Horizontal connecting rods connect the columns and vertical support rods, as well as adjacent vertical support rods, so that the columns, vertical support rods, and horizontal connecting rods form an overall load-bearing truss system, and the centroid of the overall load-bearing truss system coincides with the centroid of the load-bearing wall to be demolished.

2. The device for demolishing load-bearing walls in existing masonry structures according to claim 1, characterized in that, The horizontal connecting rod is provided at least at the top and bottom of the vertical support rod.

3. The device for demolishing load-bearing walls in existing masonry structures according to claim 1, characterized in that, The vertical support rods are evenly distributed, with a height of 300mm to 800mm and a spacing of 400mm to 700mm.

4. The device for demolishing load-bearing walls in existing masonry structures 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 demolishing load-bearing walls in existing masonry structures according to claim 1, characterized in that, A horizontally installed local reinforcing plate is connected at the intersection of the column and the horizontal connecting rod.

6. The device for demolishing load-bearing walls in existing masonry structures according to claim 1, characterized in that, The columns, vertical support rods, horizontal connecting rods, and wedges are made of steel.

7. A method for demolishing load-bearing walls in an existing masonry structure, characterized in that, The apparatus as described in any one of claims 1-6 comprises: Holes are made on both sides of the load-bearing wall to be demolished, and columns are inserted; holes are made on the top of the load-bearing wall to be demolished, and vertical support rods are inserted. Drive wedges into the top of the vertical support rods to tighten them against the upper wall, so that the entire load of the upper wall falls onto the columns and vertical support rods. In the load-bearing wall to be demolished, a hole is made in a part of the wall and a horizontal connecting rod is placed. The column, vertical support rod and horizontal connecting rod are then welded together to form an integral load-bearing truss system. The load-bearing wall to be demolished was removed using static cutting.

8. A method for demolishing a load-bearing wall in 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 driven into the middle of the horizontal connecting rods and the upper wall to tighten them.

9. A method for demolishing a load-bearing wall in an existing masonry structure according to claim 7, characterized in that, Before placing the columns and vertical support rods, mark out the positions of the columns and vertical support rods on the top of the load-bearing wall to be demolished. Before placing the horizontal connecting rod, mark the position of the horizontal connecting rod on the top of the load-bearing wall to be demolished.

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