Repair method for reinforcing purlin beam component of ancient building

Abstract

The invention relates to the technical field of ancient building repairing, and a repairing method comprises the following steps: disassembling a part, covering a purlin beam component, of an ancient building, and calibrating a decayed part of the purlin beam component; the decayed part is subjected to layered chiseling, and a removal groove is obtained; finishing the rejecting groove to obtain an inlaying groove with a regular geometrical shape; a structure reinforcing part is arranged in the inlaying groove in a matched mode, and gaps are filled with supplementary wood; epoxy resin is used for gluing the purlin beam component, the structural reinforcing piece and the supplementary wood to form a mixed body; the iron hoop is used for fixing the mixed body, and the glass rock cotton cloth liner is arranged between the iron hoop and the mixed body. According to the method, many problems existing in a traditional repairing method are solved, a more solution is provided for reinforcement of the purlin beam component of the ancient building, and the method has important practical significance and popularization value.

Description

Technical Field

[0001] The invention relates to the technical field of ancient building repair, and in particular to a repair method for reinforcing purlin components of ancient buildings. Background Art

[0002] In cultural relics protection projects, purlin components often suffer from serious decay. These decayed components often retain the original colored paintings and have high historical and artistic value, so their colored paintings need to be effectively protected. Traditional repair methods such as repair, inlay, and replacement can solve the decay problem to a certain extent, but due to the lack of targeted technical means, it is impossible to reinforce the decayed components without destroying the colored paintings, and therefore cannot meet the requirements of cultural relics protection.

[0003] For purlin components, when the decay reaches a certain degree, their load-bearing performance will be greatly reduced, and even reach the limit of the load-bearing requirements; even if the decay degree has not reached the limit, special reinforcement measures are still needed due to their historical and artistic value, or in order to protect the high-value colored paintings on the purlins.

[0004] Traditional reinforcement methods often cause irreversible damage to the appearance and color paintings of components, and cannot preserve the original appearance and color paintings of components while ensuring structural safety. Therefore, there is an urgent need for a technical solution that can effectively reinforce and strengthen decayed components while ensuring structural safety and preserve the original color paintings during the reinforcement process. Summary of the invention

[0005] The purpose of the present invention is to provide a repair method for reinforcing the purlin components of ancient buildings, at least to solve the technical problems that traditional repair methods cannot reinforce decayed components without destroying the colored paintings, cannot meet the requirements of cultural relics protection, and cannot retain the original style and color paintings of the components while ensuring the safety of the structure.

[0006] In order to solve the above technical problems, the embodiment of the present invention provides a repair method for reinforcing the purlin components of ancient buildings, comprising the following steps:

[0007] Step 1: Dismantle the parts covering the purlin components of the ancient building and mark the decayed parts of the purlin components;

[0008] Step 2: Chisel the rotten parts in layers to obtain the removal grooves;

[0009] Step 3: trimming the removed groove to obtain a regular geometric shape of the patching groove;

[0010] Step 4: Install structural reinforcements in the patching grooves and fill the gaps with additional wood;

[0011] Step 5: Use epoxy resin to glue the purlin members, structural reinforcements and supplementary wood to form a concrete body;

[0012] Step 6: Use an iron hoop to fix the concrete body, and set a glass rock wool cloth pad between the iron hoop and the concrete body.

[0013] Furthermore, the step 1 of marking the decayed parts of the purlin beam components includes the following steps:

[0014] Step 11: Use a rubber hammer to knock on the purlin beam component, and mark the position where the hollow drum sound is struck as the decay origin;

[0015] Step 12: With the decay origin as the center, use the electrical impedance detection equipment to detect the decay range of the purlin beam component at the decay origin;

[0016] Step 13: Outline the decayed areas on the surface of the purlin components according to the decay range.

[0017] Furthermore, the step 12 of using an electrical impedance detection device to detect the decay range of the purlin beam component at the decay origin includes the following steps:

[0018] Step 121: setting a current injection electrode of an impedance detection device at a decay origin, and setting a plurality of voltage measurement electrodes around the decay origin;

[0019] Step 122: using a data acquisition unit of the electrical impedance detection device to process the output and input data of the current injection electrode and the voltage measurement electrode to obtain the electrical impedance value of the purlin component around the decay origin;

[0020] Step 123: obtaining output data whose electrical impedance value is not less than the decay impedance threshold, and taking the voltage measurement electrode collection point corresponding to the output data as the boundary point;

[0021] Step 124: Connect several boundary points in sequence to obtain the decay range.

[0022] Furthermore, the decay resistance threshold is calculated by the formula Rt=(Rh-Z×σ)E, wherein Rt is the decay resistance threshold; Rh is the average electrical impedance value of non-decayed purlin components of the same material; σ is the standard deviation of the electrical impedance values ​​of non-decayed purlin components of the same material; Z is the safety factor, 1≤Z≤3; and E is the influencing factor of the environment in which the wood is located.

[0023] Furthermore, the layered chiseling in step 2 needs to be performed with a chiseling tool along the fiber direction of the purlin member, and the execution depth of each chiseling shall not exceed 3 cm, and the outline of each layer shall be chiseled until the wood is compacted.

[0024] Furthermore, the trimming of the rejection groove in step 3 includes the following steps:

[0025] Step 31: Use a grinding tool to trim the rejection groove to a regular geometric shape;

[0026] Step 32: Use an air gun to clean and remove foreign matter in the tank;

[0027] Step 33: Spray the cleaned culling groove with an insect repellent, and obtain a patching groove after drying in the shade;

[0028] The geometric shape is a stepped cone tower structure; the correction direction of the grinding tool is operated along the direction of the wood fibers.

[0029] Furthermore, the structural reinforcement member used in step 4 is a plurality of stacked and fixed I-beams or square steels, and the cross-sectional shape of the structural reinforcement member matches the shape of the patching groove.

[0030] Furthermore, the epoxy resin in step 5 is cured by microwave heating for 10 minutes.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The repair method proposed in the present invention gives equal importance to structural safety and historical value. By adding structural reinforcements in the patching grooves, the overall stress-bearing performance of the component is enhanced, ensuring the safety of the structure. At the same time, the original colored paintings and other historical and artistic values ​​of the component are retained, achieving the dual goals of cultural relic protection and structural reinforcement. In terms of precise detection and positioning, the decayed parts are accurately calibrated using rubber hammers and electrical impedance detection equipment, ensuring the accuracy and comprehensiveness of the detection and avoiding further damage caused by blind chiseling. In summary, the present invention not only solves many problems existing in traditional repair methods, but also provides a better solution for the reinforcement of purlin components of ancient buildings, which has important practical significance and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0034] Figure 1 It is a flow chart of the repair method in the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] like Figure 1 As shown, a repair method for reinforcing purlin components of ancient buildings comprises the following steps:

[0037] Step 1: Remove the parts covering the purlins of the ancient building and mark the decayed parts of the purlins. By removing the tiles, nails and other parts covering the purlins, the wood surface is exposed to facilitate inspection and repair work. Use a rubber hammer to knock on the wood surface, mark the location where the hollow drum sound is struck as the decay origin, and further determine the decayed parts. Use electrical impedance detection equipment to detect the decay range of the wood and outline the decayed area on the wood surface.

[0038] Step 2: Chisel the rotten parts in layers to obtain the removal grooves. Use the chisel tool to remove the rotten parts in layers along the direction of the wood fiber, with the depth of each removal not exceeding 3 cm, until the solid wood is exposed. A regular removal groove is formed to prepare for the subsequent filling work.

[0039] Step 3: Trim the reject slot to obtain a regular geometric shape of the patching slot. Use a grinding tool to trim the reject slot to a regular geometric shape, such as a stepped cone structure. Use an air gun to clean foreign matter in the reject slot and spray insect repellent for treatment. Ensure that the patching slot is neat and regular to provide a good contact surface for the filling material.

[0040] Step 4: Add structural reinforcements to the inlay grooves and fill the gaps with supplementary wood. Select I-beams or square steel that match the shape of the wood as structural reinforcements and insert them into the removed grooves. Use supplementary wood of the same material as the original wood to fill the remaining gaps, ensuring that the filled part is tightly integrated with the original wood. Improve the load-bearing capacity and stability of the wood while maintaining a consistent appearance.

[0041] Step 5: Use epoxy resin to bond the purlin members, structural reinforcements and supplementary wood to form a mixed body. Use epoxy resin adhesive with high strength and durability to bond the wood, reinforcements and filler wood into one. Microwave heating curing technology speeds up the curing speed, shortens the construction period and improves the bonding strength.

[0042] Step 6: Use iron hoops to fix the concrete body, and set glass rock wool cloth pads between the iron hoops and the concrete body. Use iron hoops to fix the outside of the reinforced wood to ensure the stability of the reinforced structure. Set glass rock wool cloth pads between the iron hoops and the wood to reduce the pressure of the iron hoops on the wood surface and protect artistic elements such as colored paintings on the wood surface.

[0043] The method of the present invention not only solves many problems existing in traditional repair methods, but also provides a more scientific, efficient and environmentally friendly solution for the reinforcement of purlin and beam components of ancient buildings, and has important practical significance and promotion value.

[0044] The identification of the decayed parts of the purlin beam components in step 1 includes the following steps:

[0045] Step 11: Use a rubber hammer to knock on the purlin beam components and mark the location where the hollow sound is heard as the decay origin. Use a rubber hammer to tap the wood surface and judge the internal condition of the wood by the change in sound. When you hear a hollow or abnormal sound, it indicates that the wood here may have decayed. Mark it as the decay origin. Repeatedly knock and compare to ensure that the calibrated decay origin is accurate. Record the location of the abnormal knocking sound and mark it on the wood surface.

[0046] Step 12: With the decay origin as the center, use the impedance detection equipment to detect the decay range of the purlin beam component at the decay origin. Set a current injection electrode at the decay origin, and arrange multiple voltage measurement electrodes around it. The data acquisition unit of the impedance detection equipment processes the data of the current injection electrode and the voltage measurement electrode to obtain the impedance value of the wood around the decay origin. According to the change of the impedance value, determine the decay range of the wood and mark the boundary point.

[0047] Step 13: Outline the decayed parts on the surface of the purlin beam components according to the decayed range. According to the decayed range determined in step 12, use a marker or paint to outline the contours of the decayed parts on the wood surface. When outlining, ensure that the boundaries are clear to facilitate the subsequent chiseling work. After the outline is completed, record the location, size and other information of the decayed parts to provide a reference for the subsequent repair work.

[0048] In step 12, using the electrical impedance detection equipment to detect the decay range of the purlin beam component at the decay origin includes the following steps:

[0049] Step 121: Set the current injection electrode of the impedance detection device at the decay origin, and set a number of voltage measurement electrodes around the decay origin; ensure that the current injection electrode is in close contact with the wood surface to ensure effective injection of current. The voltage measurement electrodes are evenly distributed around the decay origin to ensure that the entire suspected decay area is covered.

[0050] Step 122: Use the data acquisition unit of the impedance detection equipment to process the input and output data of the current injection electrode and the voltage measurement electrode to obtain the impedance value of the purlin component around the decay origin; the data acquisition unit records the voltage signal collected by each voltage measurement electrode, and calculates the corresponding impedance value, and monitors the change of the impedance value in real time through the data acquisition unit and records it.

[0051] Step 123: Obtain output data whose impedance value is not less than the decay impedance threshold, and set the voltage measurement electrode collection point corresponding to the output data as the boundary point; filter out the impedance values ​​that meet the conditions through the set decay impedance threshold, and mark the voltage measurement electrode collection point corresponding to the filtered impedance value as the boundary point.

[0052] Step 124: Connect several boundary points in sequence to obtain the decay range. Use a marker or paint to outline the decay range on the wood surface according to the marked boundary points, ensuring that the outlined range accurately reflects the actual decay area.

[0053] The decay resistance threshold is calculated by the formula Rt = (Rh-Z×σ)E, where Rt is the decay resistance threshold; Rh is the average electrical impedance of the same material non-decayed purlin beam components; σ is the standard deviation of the electrical impedance of the same material non-decayed purlin beam components; Z is the safety factor, 1≤Z≤3; E is the influencing factor of the environment in which the wood is located. If the wood is located in an indoor environment, E is 1; if the wood is located in an outdoor environment, E is 0.7; if the wood is located in a damp environment, E is 0.5.

[0054] Through the above formula, a more accurate decay resistance threshold can be obtained, which not only takes into account the health of the wood, but also the impact of the environment in which the wood is located. When the detected wood electrical impedance value is lower than the threshold, it can be considered that the wood is at risk of decay.

[0055] In step 2, the layered chiseling needs to be done with a chiseling tool along the fiber direction of the purlin beam component. Wood fibers have a certain directionality, and chiseling along the fiber direction can minimize damage to healthy wood and avoid the expansion of wood cracks due to transverse cutting. Chiseling along the fiber direction helps keep the chiseling boundary smooth and neat, which is convenient for subsequent filling and repair work.

[0056] The depth of each removal should not exceed 3cm. Limiting the depth of removal can avoid damage to healthy wood caused by excessive removal, ensure that each removal is within a controllable range, and reduce unnecessary damage. Layered removal can better control the depth of removal, ensure the flatness of the surface after removal, and avoid irregular surfaces caused by excessive removal.

[0057] The outline of each layer is removed until the wood is compacted. Removing to the compacted wood ensures that all rotten parts are completely removed to avoid residual rotten wood affecting the subsequent reinforcement effect. Compacted wood provides a solid support surface for subsequent filling materials, which helps the filling materials to be tightly combined with the original wood and improve the filling effect.

[0058] The above restrictions ensure that the removal operation is both effective and safe, removing the rotten parts while protecting the healthy wood, laying a good foundation for subsequent repair work. These measures help improve the quality and efficiency of the repair work and ensure that the purlins and beams of ancient buildings retain their historical and artistic value after reinforcement.

[0059] The trimming of the reject slot in step 3 includes the following steps:

[0060] Step 31: Use a grinding tool to trim the removal groove to a regular geometric shape, which is a stepped cone tower structure; the design of the stepped cone tower structure is conducive to the embedding of the filling material, ensuring that the filling material fits tightly with the wood and enhancing the stability of the structure.

[0061] Step 32: Use an air gun to clean out foreign objects in the rejection tank; Use an air gun to clean out foreign objects in the rejection tank to ensure that the inside of the tank is clean and dust-free before filling, providing a good bonding surface for the filling material.

[0062] Step 33: Spray the neatly removed groove with an insect repellent, and then dry it in the shade to obtain a patched groove; spraying the insect repellent and drying it in the shade can effectively prevent the wood from being infested by insects in the future and extend the service life of the wood.

[0063] Among them, the correction direction of the grinding tool is operated along the direction of the wood fibers. Operating the grinding tool along the direction of the wood fibers can avoid horizontal cutting of the wood fibers and reduce damage to the wood structure.

[0064] Through these steps, it is ensured that the removed grooves are trimmed neatly and suitable for subsequent filling operations, providing a solid foundation for the reinforcement of the purlin components of ancient buildings.

[0065] The structural reinforcement member used in step 4 is a plurality of stacked and fixed I-beams or square steels, and the cross-sectional shape of the structural reinforcement member matches the shape of the patching groove.

[0066] Select high-strength, corrosion-resistant I-beams or square steels, and accurately cut and surface-treat them according to the size of the patching slot; stack and fix the reinforcements in the patching slot by welding or bolting, ensuring that the reinforcements fit tightly with the slot body to form a stable reinforcement structure. This ensures that the reinforcements are embedded in the patching slot both firmly and accurately, thereby achieving effective reinforcement of the decayed components while ensuring structural safety.

[0067] The epoxy resin in step 5 is cured by microwave heating for 10 minutes. Use high-strength and high-bonding epoxy resin adhesive, mix it evenly according to the recommended ratio, and apply it to the contact surface of purlin beam components, structural reinforcements and supplementary wood; use microwave heating technology to accelerate the curing process, ensure 10 minutes of curing, and through strict temperature control, ensure uniform curing without damaging material properties; after curing, verify the curing strength through hardness testing, and check the bonding effect to ensure a solid whole. This can not only improve work efficiency, but also ensure the structural strength and bonding effect of the reinforced components.

[0068] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A repair method for reinforcing purlin components of ancient buildings, characterized in that: The following steps are involved: Step 1: Dismantle the parts covering the purlin components of the ancient building and mark the decayed parts of the purlin components; Step 2: Chisel the rotten parts in layers to obtain the removal grooves; Step 3: trimming the removed groove to obtain a regular geometric shape of the patching groove; Step 4: Install structural reinforcements in the patching grooves and fill the gaps with additional wood; Step 5: Use epoxy resin to glue the purlin members, structural reinforcements and supplementary wood to form a concrete body; Step 6: Use an iron hoop to fix the concrete body, and set a glass rock wool cloth pad between the iron hoop and the concrete body.

2. The repair method for reinforcing the purlin components of an ancient building according to claim 1 is characterized in that: Determining the decayed parts of the purlin beam components in step 1 comprises the following steps: Step 11: Use a rubber hammer to knock on the purlin beam component, and mark the position where the hollow drum sound is struck as the decay origin; Step 12: With the decay origin as the center, use the electrical impedance detection equipment to detect the decay range of the purlin beam component at the decay origin; Step 13: Outline the decayed areas on the surface of the purlin components according to the decay range.

3. The repair method for reinforcing the purlin components of an ancient building according to claim 2 is characterized in that: In step 12, using the electrical impedance detection equipment to detect the decay range of the purlin beam component at the decay origin includes the following steps: Step 121: setting a current injection electrode of an impedance detection device at a decay origin, and setting a plurality of voltage measurement electrodes around the decay origin; Step 122: using a data acquisition unit of the electrical impedance detection device to process the output and input data of the current injection electrode and the voltage measurement electrode to obtain the electrical impedance value of the purlin component around the decay origin; Step 123: obtaining output data whose electrical impedance value is not less than the decay impedance threshold, and taking the voltage measurement electrode collection point corresponding to the output data as the boundary point; Step 124: Connect several boundary points in sequence to obtain the decay range.

4. The repair method for reinforcing the purlin components of an ancient building according to claim 3 is characterized in that: The decay resistance threshold is calculated by the formula Rt=(Rh-Z×σ)E, wherein Rt is the decay resistance threshold; Rh is the average electrical impedance value of non-decayed purlin beam components of the same material; σ is the standard deviation of the electrical impedance value of non-decayed purlin beam components of the same material; Z is the safety factor, 1≤Z≤3; and E is the influencing factor of the environment in which the wood is located.

5. The repair method for reinforcing the purlin components of an ancient building according to claim 4 is characterized in that: In step 2, the layered chiseling needs to be performed with a chiseling tool along the fiber direction of the purlin component. The execution depth of each chiseling shall not exceed 3 cm, and the outline of each layer shall be chiseled until the wood is compacted.

6. The repair method for reinforcing the purlin components of an ancient building according to claim 5 is characterized in that: The trimming of the rejection groove in step 3 comprises the following steps: Step 31: Use a grinding tool to trim the rejection groove to a regular geometric shape; Step 32: Use an air gun to clean and remove foreign matter in the tank; Step 33: Spray the cleaned culling groove with an insect repellent, and obtain a patching groove after drying in the shade; The geometric shape is a stepped cone tower structure; the correction direction of the grinding tool is operated along the direction of the wood fibers.

7. The repair method for reinforcing the purlin components of an ancient building according to claim 6 is characterized in that: The structural reinforcement member used in step 4 is a plurality of stacked and fixed I-beams or square steels, and the cross-sectional shape of the structural reinforcement member matches the shape of the patching groove.

8. The repair method for reinforcing the purlin components of an ancient building according to claim 7 is characterized in that: The epoxy resin in step 5 is cured by microwave heating for 10 minutes.

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