A stone strip floor anti-breaking and falling reinforcing method

Abstract

Disclosed is a stone strip floor anti-breaking and falling reinforcement method, which realizes multi-point clamping and limiting of a single stone strip by segmentally implanting expansion bolts in the vertical side seams of adjacent stone strips, lays a fine steel mesh on the upper surface of the floor and welds the upper ends of the expansion bolts to form an integral pull tie system, and finally pours cement mortar or fine stone concrete to form an integral protection, maintenance and molding, thereby constructing a triple anti-falling and reinforcement system of "dot matrix limiting + integral mesh pull tie + surface composite protection"; the present application solves the technical problems of the existing traditional stone strip floor, such as brittleness, easy brittle fracture and falling, and traditional reinforcement process, such as building shutdown, destruction of the original appearance of the dwelling, high cost and complex construction, and can be constructed without damage under normal use of the building, the traditional architectural style is completely preserved, and the construction is simple, low in cost and high in reinforcement reliability.

Description

Technical Field

[0001] This invention relates to the field of reinforcement and renovation technology for traditional residential buildings, specifically to a non-destructive reinforcement process for stone floor slabs in traditional residential buildings in typhoon-prone and humid coastal areas of Fujian Province to prevent breakage and collapse. Background Technology

[0002] The coastal areas of Fujian, such as Quanzhou and Zhangzhou, have a humid and rainy climate with frequent typhoons. Traditional two- to three-story houses in these areas commonly use stone slab flooring for load-bearing structures. These stone slab floorings are characterized by their narrow, thin structure. The tensile and bending strength of the stone itself is uncertain and unstable due to the influence of natural or acquired micro-cracks within the stone. Under long-term self-weight loads, live loads, and the alternating humid and wind pressure conditions of the coastal environment, individual stone slabs can suddenly fracture, leading to frequent accidents of stone slabs falling, posing a significant safety hazard. Residents of these buildings are generally wary of this.

[0003] Currently, there is a large number of existing stone slab-built houses, most of which have been in normal living and use for a long time, making it impossible to use traditional reinforcement methods such as stopping construction, vacating the premises, and large-scale renovation. In the existing building reinforcement system, conventional reinforcement methods mainly include the replacement of the entire floor slab, the erection of scaffolding for the exterior facade, and the reinforcement with a thick layer of cast-in-place concrete.

[0004] Chinese patent CN101691818A discloses a method for reinforcing a building, which is implemented according to the following steps: 1) removing the surface of the structure to be reinforced to expose the solid parts; 2) pre-wetting the structure to be reinforced with water; 3) inserting pins to connect the steel mesh and the structure to be reinforced, and binding the steel mesh; 4) spraying an interface agent coating on the surface of the structure to be reinforced; 5) spraying a polymer-modified cement mortar bonding layer and a polymer-modified cement mortar protective layer in layers on the interface agent coating.

[0005] Chinese Patent CN101949221A discloses a method for reinforcing stone slab floor slabs. First, a steel mesh 1' is attached and installed on the bottom surface of the stone slab floor slab 4' to be reinforced using connectors. Then, cement slurry 2' is applied to the bottom surface of the stone slab floor slab with the steel mesh installed. Finally, modified cement mortar 3' with a strength of not less than 25MPa is applied on the cement slurry 2', forming a composite reinforcement layer composed of the steel mesh, the cement slurry coating, and the modified cement mortar coating.

[0006] The aforementioned reinforcement techniques have several inherent drawbacks: First, the renovation requires vacating the premises and interrupting normal building use, resulting in a long renovation period and significant disturbance to residents; second, construction under the stone slab floor requires additional support, increasing costs; and third, there is a risk of steel reinforcement rusting or poor bonding between the mortar and the stone slab, leading to the entire mortar layer detaching. Therefore, users are not very accepting of these solutions. Summary of the Invention

[0007] The purpose of this invention is to provide a method for reinforcing stone slab floors to prevent collapse without requiring scaffolding to be erected under the slab, without stopping the building, and without damaging the original appearance of the floor slab.

[0008] To achieve the above objectives, the present invention provides a method for reinforcing stone slab floors to prevent collapse, comprising the following steps: 1. Drill vertical holes at 400-600mm intervals from top to bottom in the gaps between the stone strips of the floor slab; 2. Insert stainless steel expansion bolts of appropriate size into the above-mentioned holes, ensuring that the upper end of the expansion bolts is higher than the upper edge of the stone strip; 3. Add nuts to the expansion bolts and tighten them to allow the sleeves of the expansion bolts to fully expand, thereby tightly clamping the expansion bolts between the two adjacent stone strips; 4. Lay a single layer of two-way steel mesh horizontally on the stone slab floor. The steel bars are 6mm in diameter and the mesh is 200*200mm. 5. Spot weld the upper end of the expansion bolt to the gap between the mesh and the stone strip to the reinforcing bar, and weld the mesh to all the expansion bolts; 6. Fill the gaps between the stone strips with cement mortar, and then pour a 20-40mm thick layer of cement mortar onto the mesh to form a concrete floor slab surface.

[0009] Compared with existing traditional reinforcement technologies, this invention has the following outstanding technical advantages: 1. Construction can be carried out without interruption of the building and without environmental interference: The entire process of this invention is carried out only on the surface of the indoor floor slab. There is no need to erect scaffolding under the slab, no need to vacate the residents, and no need to interrupt the normal living and use of the building. It is fully suitable for the renovation of existing residential buildings. The construction is equivalent to the floor decoration project, which solves the problems of traditional reinforcement processes that require shutdown and vacating and construction that disturbs the residents.

[0010] 2. Non-destructive renovation and preservation of original appearance: This invention only involves thin-layer protective pouring of the floor surface, without demolishing, replacing or altering the original stone strip floor structure, thus preserving the original appearance and interior style of traditional dwellings to the greatest extent, which meets the requirements for the protection and renovation of traditional ancient buildings and dwellings.

[0011] 3. Triple protection, safe, reliable and stable: It adopts a triple reinforcement structure of segmented clamping and limiting, overall steel reinforcement and surface composite bonding, which specifically solves the pain points of brittle fracture and sudden fall of stone. It can prevent falling when a single board breaks and prevent failure of multi-point limiting. It has high reinforcement redundancy and excellent safety performance.

[0012] 4. Simple construction and strong adaptability: The overall construction process is the same as conventional floor plastering and decoration work. No large machinery or professional high-altitude operations are required. The process is simple and the construction period is short. It can be fully adapted to the reinforcement and renovation of various traditional stone slab houses in Quanzhou, Zhangzhou and other coastal areas of Fujian.

[0013] 5. Low cost and suitable for mass promotion: The expansion bolts, thin steel bars, cement mortar and fine stone concrete used are all conventional and common building materials. The amount of materials used is small and the construction cost is low. Compared with traditional overall replacement and thickening pouring processes, the renovation cost is greatly reduced and it has the value of large-scale mass promotion and application.

[0014] 6. Excellent durability and no maintenance required: The inorganic cementitious material on the surface completely wraps the metal components, which can effectively isolate them from the humid coastal air and water vapor corrosion, prevent the steel bars and bolts from rusting and aging, and ensure that the reinforcement system has strong integrity and stable performance, requiring no additional maintenance for long-term service. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the existing technology structure; Figure 2 This is a cross-sectional view of the structure of the present invention; Figure 3 This is a top view of the structure of the present invention.

[0016] Label Explanation: 1. Stone strips; 11. Gaps between stone strips; 2. Expansion bolts; 3. Nuts; 4. Gaps between stone strips towards reinforcing bars; 5. Gaps between stone strips perpendicular to reinforcing bars. Detailed Implementation

[0017] To illustrate the technical content, structural features, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0018] like Figure 2 , 3 As shown, this embodiment selects a typical two-story traditional stone slab house in Zhangzhou, a coastal area of ​​Fujian Province, for reinforcement and renovation. The floor slabs of this building consist of multiple narrow and thin stone slabs arranged side by side. After long-term use, the slabs have developed minor aging cracks, posing a safety hazard of brittle fracture and collapse. The specific reinforcement process steps are as follows: The first step is on-site surveying and base surface cleaning. The span, thickness, and spacing of each stone strip 1 are measured and recorded on-site. Usually, the gaps 11 between adjacent stone strips are already filled with mortar. Holes are drilled vertically downwards with an electric drill, with the hole diameter and depth matching the expansion bolts. The bolts are embedded to a depth not less than half the thickness of the stone strip, but do not need to penetrate to the bottom of the slab. Thin mortar is poured into the holes, the expansion bolts are inserted, and the push-down nuts are tightened to allow the sleeve to fully expand and tighten.

[0019] The second step is to drill vertical holes 400-600mm apart in the gap 11 between two adjacent stone strips, and insert expansion bolts 2 with appropriate diameter and length into the holes. Add nuts 3 to the expansion bolts 2 and tighten them so that the sleeve of the expansion bolts 2 can fully expand and the bolt shank can be tightly clamped between the side walls of the two stone strips, forming a multi-point vertical limiting clamp for a single stone strip, ensuring that there is a reliable hanging point if the single stone strip breaks at any position.

[0020] The third step involves laying a steel mesh across the entire floor slab. The steel bars are 6mm in diameter, and the mesh is 200*200mm. The upper ends of the expansion bolts 2 are spot-welded to the steel bars 4 through the gaps between the stone strips in the mesh. The steel bars 4 through the gaps between the stone strips and the steel bars 5 perpendicular to the gaps between the stone strips, together with the expansion bolts 2, form an interconnected overall load-bearing grid. This integrates the scattered single-point clamping structures into a unified load-bearing system, improving the overall fall resistance and structural integrity of the floor slab.

[0021] The fourth step is to pour cement mortar into the gaps 11 between the stone strips and evenly spread and cover it with steel mesh. The spreading thickness is 20-40mm, ensuring that the steel mesh, welded joints, and bolt ends are completely wrapped. The entire surface is then smoothed, compacted, and finished to ensure that the poured layer is tightly bonded and cured to the top surface of the original stone slab, forming a composite integrated reinforcement structure of stone strips + bolt clamps + steel mesh tie-down + surface protection.

[0022] The fifth step is to lay floor tiles on the paving in the fourth step, depending on the decoration needs (not shown in the picture).

[0023] The core reinforcement principle of this invention is as follows: Expansion bolts embedded in the side seams of the stone slabs are used to achieve multi-point segmented clamping and restraint of a single stone slab. A steel mesh above provides overall slab bonding, and a surface inorganic cementitious material is poured to form a triple protection system of "point-matrix restraint + overall bonding + composite adhesion." Even if a single stone slab experiences brittle fracture, the fractured slab can be effectively suspended by the expansion bolts, and the steel mesh distributes the stress throughout, completely preventing the broken slab from falling and fundamentally eliminating safety hazards.

[0024] The significant features of this invention are: 1) It is reinforced from above and will not fall off; 2) It is beautiful and practical, and can completely maintain the original appearance of the stone strip floor slab; 3) It is inexpensive, requiring only ordinary expansion bolts, thin steel bars, and cement mortar, and the amount used is not large; tiles can be laid directly on it, saving the need to add 5 centimeters of concrete specifically for laying tiles, which means that the actual cost is much lower; 4) It is easy to construct, equivalent to plastering the floor, and can be constructed directly on the floor slab without the need to erect scaffolding.

[0025] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for reinforcing stone slab floors to prevent collapse and fall, characterized in that: Includes the following steps: 1) Drill vertical holes at 400-600mm intervals from top to bottom in the gaps between the stone strips of the floor slab; 2) Insert stainless steel expansion bolts of appropriate size into the above-mentioned holes, ensuring that the upper end of the expansion bolts is higher than the upper edge of the stone strip; 3) Add nuts to the expansion bolts and tighten them to allow the sleeves of the expansion bolts to fully expand, thereby creating a "hidden arch" force mechanism in the lower middle part of the stone strip between two adjacent expansion bolts. 4) Lay a single layer of two-way steel mesh horizontally on the stone slab floor. The steel bars are 6mm in diameter and the mesh is 200*200mm. 5) Spot weld the upper end of the expansion bolt to the steel mesh, and weld the mesh to all the expansion bolts; 6) Fill the gaps between the stone strips with cement mortar, then compact and smooth the mesh with 20-40mm thick cement mortar, or pour a fine stone concrete surface layer to cover and protect the steel mesh and expansion bolts.

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