A fortification structure for preventing collapse of a Tibetan-style watchtower daughter wall

Abstract

This utility model discloses a reinforcement structure for preventing the parapet wall of a Tibetan-style fortified house from collapsing, relating to the field of building construction technology. It includes a wall with a first wire mesh on both its inner and outer surfaces. A base layer of cement mortar is applied to the side of the first wire mesh away from the wall, and a grid-like steel mesh is applied to the side of the base cement mortar away from the wall. A second wire mesh is applied to the side of the steel mesh away from the wall, and a surface layer of cement mortar is applied to the side of the second wire mesh away from the wall. The steel meshes on the inner and outer sides of the wall are fixedly connected by tie bars. Angle steel is installed at the external and internal corners of the wall, and the angle steel is fixedly connected to the external and internal corners by connecting components. This utility model utilizes two layers of wire mesh and two layers of cement mortar to form a complete and closed overall constraint system, preventing localized damage caused by the lack of bonding between the adobe bricks, thus improving the overall stability and overturning resistance of the wall.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a reinforcement structure for preventing the parapet wall of a Tibetan-style fortified house from collapsing. Background Technology

[0002] Tibetan-style watchtowers are common traditional dwellings, primarily constructed with a mixture of adobe walls and timber components. The adobe parapet walls on the roof are between 1.0 and 1.2 meters high, with adobe bricks measuring 190mm × 400mm × 100mm. They are constructed using a dry-laying and ramming method, resulting in poor bonding and structural integrity. When damaged, the bricks are prone to falling off the roof edges and collapsing. Therefore, it is necessary to design a reinforced structure for the parapet walls of Tibetan-style watchtowers that incorporates traditional construction methods to prevent collapse, thus minimizing the risk of falling or partial collapse and endangering personal safety and property.

[0003] Furthermore, the parapet wall is not connected to the lower roof structure, and the adobe wall has extremely low bending resistance. During an earthquake, it is subjected to both horizontal inertial forces and vertical seismic forces, generating out-of-plane bending moments. As the parapet wall is a protruding structural component, its mass and stiffness suddenly decrease, causing a whiplash effect that leads to lateral swaying, partial damage, and collapse. Existing traditional reinforcement methods include the steel strip circumferential restraint method and the chemical grouting reinforcement method. The steel strip circumferential restraint method usually sets a ring-shaped steel strip or flat steel at the top of the parapet wall, but for adobe walls with almost no bonding between the bricks, the overall restraint is weak and cannot resist the vertical force causing the adobe bricks to shift. The chemical grouting method enhances the bonding of the adobe bricks by injecting epoxy resin, but the exposed adobe bricks and the rigid patches formed after the epoxy resin cures are prone to stress concentration, which leads to accelerated peeling of the adobe bricks in the reinforced area, eventually resulting in partial or complete collapse. Therefore, traditional reinforcement methods have revealed fundamental defects such as poor compatibility between the reinforcement system and the original structure and mismatch in anti-damage mechanisms, making it difficult to meet the requirements for reinforcement of the parapet walls of Tibetan-style watchtowers made of adobe bricks.

[0004] In summary, both the steel strip circumferential restraint method and the chemical grouting reinforcement method have several systemic defects. The steel strip circumferential restraint only provides localized restraint and is unsuitable for parapet walls where there is no bonding between adobe bricks. The epoxy resin in chemical grouting cures and forms rigid patches, which can increase the spalling rate of adobe bricks, leading to overall collapse. Therefore, a new reinforcement structure for preventing the collapse of parapet walls in Tibetan-style fortified houses needs to be designed. This new reinforcement method should address core challenges such as stiffness imbalance, interface peeling, and brittle failure, taking into account the overall structural stress requirements. Utility Model Content

[0005] The purpose of this invention is to provide a reinforcement structure for preventing the parapet wall of a Tibetan-style fortified house from collapsing, thereby solving the problems mentioned in the background art.

[0006] The present invention adopts the following technical solution:

[0007] This utility model discloses a reinforcement structure for preventing the parapet wall of a Tibetan-style watchtower from collapsing. It includes a wall body, on both the inner and outer surfaces of the wall body, a first wire mesh is provided. The side of the first wire mesh away from the wall body is provided with a base cement mortar. The side of the base cement mortar away from the wall body is provided with a steel mesh arranged in a grid pattern. The side of the steel mesh away from the wall body is provided with a second wire mesh. The side of the second wire mesh away from the wall body is provided with a surface cement mortar.

[0008] The wall is provided with through tie bars, and the steel mesh on the inner and outer sides of the wall is fixedly connected by the tie bars;

[0009] The wall is provided with external corner steel at the external corner and internal corner steel at the internal corner. The external corner steel and the internal corner steel are fixedly connected together by a connecting component.

[0010] Preferably, both the base cement mortar and the surface cement mortar are polymer-modified cement mortars.

[0011] Preferably, the reinforcing mesh includes horizontal reinforcing bars and vertical reinforcing bars, which are arranged in a grid pattern to form the reinforcing mesh.

[0012] Preferably, both the external angle steel and the internal angle steel extend from the bottom to the top of the wall.

[0013] Preferably, the connecting assembly includes a bolt assembly, a steel plate, and a connecting plate;

[0014] The steel plate is positioned on the outer side of the wall, corresponding to the inside corner angle steel side plate. The bolt assembly passes through the steel plate, the wall, and the inside corner angle steel side plate, connecting the three together.

[0015] One side of the gusset plate is fixedly connected to the steel plate, and the other side of the gusset plate is fixedly connected to the side plate of the external corner steel.

[0016] Preferably, the steel plate, the connecting plate, and the external corner steel are all disposed between the base cement mortar and the first wire mesh.

[0017] The internal corner steel is set on the outermost side of the surface cement mortar at the internal corner of the wall.

[0018] Preferably, the tie bar is installed through the wall, and hooks are provided at both ends of the tie bar, with the hooks at both ends of the tie bar tightly hooked to the outside of the intersection of the steel mesh.

[0019] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0020] This utility model employs external angle steel, internal angle steel, connecting components, two layers of wire mesh, and two layers of cement mortar to form a complete and closed overall constraint system, preventing local damage caused by the lack of bonding between adobe bricks and improving the collapse resistance. In addition, the synergistic effect of tie bars and steel mesh forms a three-dimensional tie system in the dry-laid adobe bricks, further enhancing the overall stability and overturning resistance of the parapet wall. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a top view of the reinforcement structure for preventing the parapet wall of a Tibetan-style watchtower from collapsing, based on this utility model.

[0023] Figure 2 This is a schematic diagram of the base layer cement mortar and surface layer cement mortar of the reinforcement structure for preventing the parapet wall of a Tibetan-style watchtower from collapsing, according to this utility model.

[0024] Figure 3 This is a cross-sectional view of the reinforcement structure for preventing the parapet wall of a Tibetan-style watchtower from collapsing, as described in this utility model.

[0025] Figure 4 This is a front view of the connecting component structure in the reinforcement structure for preventing the parapet wall of a Tibetan-style fortified house from collapsing, as described in this utility model.

[0026] Explanation of reference numerals in the attached drawings: 1. Wall; 2. Tie bar; 3. Steel mesh; 3-1. Horizontal steel bar; 3-2. Vertical steel bar; 4. First wire mesh; 5. Base cement mortar; 6. Surface cement mortar; 7. External angle steel; 8. Internal angle steel; 9. Connecting assembly; 9-1. Bolt assembly; 9-2. Steel plate; 9-3. Connecting plate; 10. Second wire mesh. Detailed Implementation

[0027] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] like Figures 1 to 4 As shown, this embodiment discloses a reinforcement structure for preventing the parapet wall of a Tibetan-style watchtower from collapsing, including a wall 1, with a first wire mesh 4 (such as...) on both the inner and outer surfaces of the wall 1. Figure 1As shown, the lower right corner of wall 1 is the inner side of wall 1, and the upper, left and upper left corners of wall 1 are the outer side of wall 1. A layer of base cement mortar 5 is applied to the side of the first wire mesh 4 away from wall 1. A steel mesh 3 arranged in a grid pattern is set on the side of the base cement mortar 5 away from wall 1. A second wire mesh 10 is set on the side of the steel mesh 3 away from wall 1. The second wire mesh 10 can improve the load-bearing capacity and strengthen the overall structure. A layer of cement mortar 6 is applied to the side of the second wire mesh 10 away from wall 1.

[0029] Among them, the base cement mortar 5 and the surface cement mortar 6 are both polymer-modified cement mortars, which are compatible with the deformation of the adobe bricks and have a significantly improved interfacial bonding strength compared with traditional mortars.

[0030] The wire diameters of the first wire mesh 4 and the second wire mesh 10 are both 4 to 6 mm. The thickness of the base cement mortar 5 on both the inner and outer sides of the wall 1 is 10 mm, and the thickness of the surface cement mortar 6 on both the inner and outer sides of the wall 1 is also 10 mm.

[0031] Pre-drilled holes are made in the wall 1, and tie bars 2 are installed in the pre-drilled holes. The tie bars 2 penetrate through both the inner and outer sides of the wall 1, and hooks are set at both ends of the tie bars 2. The hooks are tightly hooked to the outside of the intersection of the steel mesh 3, thereby fixing and connecting the steel mesh 3 on the inner and outer sides of the wall 1. The tie bars 2 are arranged in a quincunx pattern with a spacing of 600×600mm.

[0032] An external corner steel 7 is provided at the external corner of wall 1, and an internal corner steel 8 is provided at the internal corner of wall 1. Both the external corner steel 7 and the internal corner steel 8 extend from the bottom to the top of wall 1. The external corner steel 7 and the internal corner steel 8 are fixedly connected together by a connecting component 9. In this embodiment, both the external corner steel 7 and the internal corner steel 8 are L100×6mm in size.

[0033] In this embodiment, the reinforcing mesh 3 includes horizontal reinforcing bars 3-1 and vertical reinforcing bars 3-2, which are arranged in a grid pattern to form the reinforcing mesh 3. Both the horizontal reinforcing bars 3-1 and the vertical reinforcing bars 3-2 are C6 grade and are arranged at 200mm intervals. The vertical reinforcing bars 3-2 on both sides of the wall 1 extend to the top of the wall and bend inward toward the interior of the wall 1.

[0034] The connecting assembly 9 includes a bolt assembly 9-1, a steel plate 9-2, and a connecting plate 9-3. The steel plate 9-2 is located on the outside of the wall 1, corresponding to the side plate of the internal corner angle steel 8. The steel plate 9-2, the wall 1, and the side plate of the internal corner angle steel 8 are provided with reserved installation holes. The bolt assembly 9-1 passes through the steel plate 9-2, the wall 1, and the side plate of the internal corner angle steel 8 and connects the three together. One side of the connecting plate 9-3 is fixedly connected to the steel plate 9-2, and the other side of the connecting plate 9-3 is fixedly connected to the side plate of the external corner angle steel 7.

[0035] In this embodiment, steel plate 9-2, connecting plate 9-3, and external corner steel 7 are all placed between the base cement mortar 5 and the first wire mesh 4. Internal corner steel 8 is placed on the outermost side of the surface cement mortar 6 at the internal corner of the wall 1. That is, on the outer side of the wall 1 (where the wall 1 is pressed and plastered). Figure 1 Before applying the base cement mortar 5 to the top, left, and upper left corner of wall 1, pre-install steel plates 9-2, gusset plates 9-3, and external corner steel 7, insert bolt assemblies 9-1, and temporarily fix steel plates 9-2, gusset plates 9-3, and external corner steel 7. Then, apply the base cement mortar 5 to the outside of wall 1, ensuring it is within the base cement mortar 5. The internal corner steel 8 is placed on the inside of wall 1 (top, left, and upper left corner). Figure 1 After the cement mortar 6 on the surface of the wall 1 (towards the lower right corner) is applied, the reserved installation hole of the internal corner angle steel 8 is fitted onto the bolt of the bolt assembly 9-1 and tightened with a nut.

[0036] In this embodiment, bolt assembly 9-1 is an M16 high-strength bolt, steel plate 9-2 is 300×300×6mm, and gusset plate 9-3 is 50×5mm.

[0037] In this utility model

[0038] The construction process of this utility model is as follows:

[0039] Step 1: Grind and clean the plaster layer on the surface of wall 1. Arrange the first wire mesh 4 with a diameter of 4 to 6 mm on both the inner and outer surfaces of wall 1. At the same time, drill holes in wall 1 and insert tie bars 2 in a quincunx pattern with a spacing of 600×600 mm. The two ends of tie bars 2 extend to the outside of wall 1. The two ends of tie bars 2 are reserved with hooks for subsequent tensioning of steel mesh 3.

[0040] Step 2: Angle steel 7 is installed outside the first wire mesh 4 on the outside of wall 1. Angle steel 7 extends from the bottom to the top of wall 1. Holes are drilled at the corresponding installation positions of steel plate 9-2 at the top and bottom of wall 1, and bolts of bolt assembly 9-1 are inserted to temporarily fix steel plate 9-2 to wall 1. Steel plate 9-2 and angle steel 7 are fully welded together with two 50×5mm gusset plates 9-3. After welding, a layer of base cement mortar 5 with a thickness of 10mm is applied to both the outside and inside of wall 1.

[0041] Step 3: Construction on the inner side of wall 1: After the strength of the material in Step 2 reaches the required age, steel mesh 3 is arranged on the inner side of wall 1. The hooks of the tie bars 2 are hooked on the outer side of the intersection of steel mesh 3. The vertical steel bars 3-2 extend to the top of the wall and bend towards the inside of wall 1. A second steel wire mesh 10 is then arranged on the outer surface of steel mesh 3 away from wall 1. A layer of 10mm thick surface cement mortar 6 is applied to the outer surface of the second steel wire mesh 10 away from wall 1. After the surface cement mortar 6 reaches the required age, internal corner steel 8 is arranged. The internal corner steel 8 extends from the bottom to the top of wall 1. Holes are pre-drilled in the internal corner steel 8, and the pre-drilled holes of the internal corner steel 8 are fitted onto the bolts of bolt assembly 9-1 exposed on the wall surface. The nuts are then tightened.

[0042] Step 4: Construction on the outside of wall 1: After the base cement mortar 5 on the outside of wall 1 has reached the required strength, steel mesh 3 is arranged outside the base cement mortar 5. The steel bars are configured as C6 @200mm. The hooks of the tie bars 2 are hooked to the outside of the intersection of the steel mesh 3. The vertical steel bars 3-2 extend to the top of the wall and bend towards the inside of wall 1. A second steel wire mesh 10 is arranged on the outer surface of the steel mesh 3. Finally, a layer of surface cement mortar 6 with a thickness of 10mm is pressed onto the outer surface of the second steel wire mesh 10 away from wall 1.

[0043] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A reinforcement structure for preventing the parapet wall of a Tibetan-style fortified house from collapsing, characterized in that: The wall (1) is provided with a first wire mesh (4) on both the inner and outer surfaces of the wall (1). The first wire mesh (4) is provided with a base cement mortar (5) on the side away from the wall (1). The base cement mortar (5) is provided with a steel mesh (3) arranged in a grid pattern on the side away from the wall (1). The steel mesh (3) is provided with a second wire mesh (10) on the side away from the wall (1). The second wire mesh (10) is provided with a surface cement mortar (6) on the side away from the wall (1). The wall (1) is provided with a through tie bar (2), and the steel mesh (3) on the inner and outer sides of the wall (1) is fixedly connected by the tie bar (2); The wall (1) is provided with a yang corner steel (7) at the yang corner and a yin corner steel (8) at the yin corner. The yang corner steel (7) and the yin corner steel (8) are fixedly connected together by a connecting component (9).

2. The reinforcement structure for preventing the parapet wall of a Tibetan-style watchtower from collapsing, as described in claim 1, is characterized in that: Both the base cement mortar (5) and the surface cement mortar (6) are polymer-modified cement mortars.

3. The reinforcement structure for preventing the parapet wall of a Tibetan-style watchtower from collapsing, as described in claim 1, is characterized in that: The steel mesh (3) includes horizontal steel bars (3-1) and vertical steel bars (3-2), which are arranged in a grid pattern to form the steel mesh (3).

4. The reinforcement structure for preventing the parapet wall of a Tibetan-style watchtower from collapsing, as described in claim 1, is characterized in that: Both the external angle steel (7) and the internal angle steel (8) extend from the bottom to the top of the wall (1).

5. The reinforcement structure for preventing the parapet wall of a Tibetan-style watchtower from collapsing, as described in claim 1, is characterized in that: The connecting assembly (9) includes a bolt assembly (9-1), a steel plate (9-2), and a gusset plate (9-3). The steel plate (9-2) is set on the outside of the wall (1) at a position corresponding to the side plate of the inside corner steel (8). The bolt assembly (9-1) passes through the steel plate (9-2), the wall (1), and the side plate of the inside corner steel (8) and connects the three together. One side of the gusset plate (9-3) is fixedly connected to the steel plate (9-2), and the other side of the gusset plate (9-3) is fixedly connected to the side plate of the external angle steel (7).

6. The reinforcement structure for preventing the parapet wall of a Tibetan-style fortified house from collapsing, as described in claim 5, is characterized in that: The steel plate (9-2), the gusset plate (9-3), and the external corner steel (7) are all disposed between the base cement mortar (5) and the first wire mesh (4); The internal corner steel (8) is set on the outermost side of the surface cement mortar (6) at the internal corner of the wall (1).

7. The reinforcement structure for preventing the parapet wall of Tibetan-style fortified houses from collapsing, as described in claim 1, is characterized in that: The tie bar (2) is installed through the wall (1). The two ends of the tie bar (2) are provided with hooks. The hooks at both ends of the tie bar (2) are tightly hooked to the outside of the intersection of the steel mesh (3).

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