Foundation reinforcement construction method based on ancient building repair

Abstract

The application relates to the technical field of ancient building foundation reinforcement and repair, and discloses a foundation reinforcement construction method based on ancient building repair, which comprises the following steps: erecting a protective fence near the foundation of an ancient building to be repaired, erecting temporary fixing frames inside and outside the ancient building to support the top beams of the ancient building; excavating soil near the column soil, the gold Sangdun and the eave Sangdun of the ancient building until the ash soil layer of the foundation of the ancient building is exposed to the ground, and covering the excavated soil with a film for temporary storage. Hollow steel pipes are embedded in the column soil, the gold Sangdun and the eave Sangdun of the ancient building until the hollow steel pipes reach the solid bearing layer under the ground, then mortar is injected into the hollow steel pipes to enhance the strength of the hollow steel pipes, and galvanized steel supports are used to connect the column soil, the gold Sangdun and the eave Sangdun, the hollow steel pipes support the galvanized steel supports, so that the column soil, the gold Sangdun and the eave Sangdun are supported, and the overall structure can play a good reinforcing role on the foundation of the ancient building.

Description

Technical Field

[0001] This invention relates to the field of foundation reinforcement and repair technology for ancient buildings, specifically a foundation reinforcement construction method based on the restoration of ancient buildings. Background Technology

[0002] Ancient architecture refers to pre-1949 civil and public buildings of historical significance, including those from the Republican era. Many ancient towns and most major cities in China still retain some ancient buildings. However, in today's era of rapid construction, we must view and protect ancient buildings and their inherent cultural characteristics with a developmental perspective; ensuring that ancient architectural culture is preserved for posterity while also generating modern value for ancient cultural heritage. Due to their age, ancient buildings are prone to problems such as foundation subsidence over time.

[0003] According to the search, Chinese patent document, publication number CN114941453A, discloses a foundation reinforcement construction method based on the repair of ancient buildings. Taking the center of the original pile as the center point, an edge sealing component is added to the outer perimeter. It is fixed to the original foundation soil surface by cutting insert plates so that the edge sealing component can surround the original pile in all directions, especially the grout. By setting the slot plate, the sealing connection of the edge sealing component is effectively improved during use, which effectively reduces the subsequent gap leakage of grout, avoids grout waste, and ensures the foundation reinforcement effect.

[0004] However, the aforementioned reinforcement methods have limited insertion depth of the sealing components into the original foundation, thus limiting their effectiveness in preventing grout leakage. Furthermore, without any fixing components, the mortar injected below the original foundation is prone to loosening and dispersing, wasting mortar and offering little reinforcement to the existing foundation. Therefore, we propose a foundation reinforcement construction method based on ancient building restoration to address these issues. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a foundation reinforcement construction method based on the restoration of ancient buildings. This method has advantages such as saving mortar to effectively reinforce the original foundation of ancient buildings at specific points, and being able to reinforce the beams and columns of ancient buildings. It solves the problem of the lack of practical and effective methods for foundation reinforcement of ancient buildings.

[0007] (II) Technical Solution

[0008] To achieve the aforementioned goals of effectively reinforcing the original foundation of ancient buildings while saving mortar, and also reinforcing the beams and columns of ancient buildings, this invention provides the following technical solution: a foundation reinforcement construction method based on the restoration of ancient buildings, comprising the following steps:

[0009] Step 1: Erect protective railings near the foundation of the ancient building to be repaired, and set up temporary fixed frames inside and outside the ancient building to support the top beams of the ancient building.

[0010] Step 2: Excavate the soil near the foundation of the ancient building, including the earthen embankment, the golden mulberry mound, and the eaves mulberry mound, until the gray soil layer of the foundation of the ancient building is exposed on the surface. Cover the excavated soil with a film for temporary storage.

[0011] Step 3: Install galvanized steel brackets on the sides of the earthen wall, the golden mulberry mound, and the eaves mulberry mound, then install hydraulic cylinder brackets on the galvanized steel brackets, and install hydraulic cylinders on the hydraulic cylinder brackets.

[0012] Step 4: Place the hollow steel pipe inside the guide hole of the galvanized steel bracket, and then use a hydraulic cylinder to drive the hollow steel pipe vertically into the soil. The two hollow steel pipes can be connected by threads until the hollow steel pipe reaches the solid load-bearing bottom layer of the soil.

[0013] Step 5: Drill holes in the outer surface of the hollow steel pipe at the top, and then inject mortar into the hollow steel pipe in sections at the drilled locations;

[0014] Step Six: After the cement mortar inside the hollow steel pipe has dried, install the capping components on the galvanized steel bracket and remove the hydraulic cylinder bracket. Selectively reinforce the main pillars and eaves pillars of the ancient building.

[0015] Step 7: Mix insect repellent into the soil covered by the film, then backfill the soil back to the excavated location and remove the temporary support frame.

[0016] Preferably, the temporary fixing frames support the top beams of the ancient building, are distributed horizontally and vertically, and the spacing between any two adjacent temporary fixing frames is two meters.

[0017] Preferably, the galvanized steel bracket comprises a base plate, a guide plate, and a mounting plate. One end of the base plate is fixedly connected to the guide plate, the upper surface of the guide plate is fixedly connected to the mounting plate, a guide hole is formed through the upper surface of the guide plate, and at least two circular holes are formed through the outer surface of the mounting plate.

[0018] Preferably, the guide plate has screw holes on both sides, and the two sides of the guide plate are connected to the cylinder bracket by bolts. A hydraulic cylinder is installed at the top center of the cylinder bracket, and the hollow steel pipe is clearance-fitted with the guide hole.

[0019] Preferably, the hollow steel pipe is one meter long, and two hollow steel pipes are connected by threads. The outer surface of the hollow steel pipe is coated with an anti-corrosion layer, with a diameter of 60 mm and a wall thickness of 5 mm.

[0020] Preferably, the mortar comprises cement, fly ash, sand, water and quick-drying agent, and the mortar mix ratio is cement 1: fly ash 1: sand 1.5: water 0.5: quick-drying agent 0.005.

[0021] Preferably, the segmented grouting includes injecting grout in two stages. After the first grouting, wait 2 hours before injecting the second grouting. Stop injecting grout after the grout overflows from the port of the uppermost hollow steel pipe.

[0022] Preferably, the capping component comprises a side plate, a cover plate, and side edges, wherein the bottom end of the side plate is fixedly connected to the cover plate, the two sides of the cover plate are fixedly connected to the side edges, and a circular hole is formed through the outer surface of the side plate.

[0023] Preferably, step six involves selectively reinforcing the main pillars and eaves pillars of the ancient building, specifically including the following:

[0024] Check the outer surface of the main pillar and eaves pillar for cracks. If there are no cracks or other problems, no reinforcement is needed. If there are cracks that have reached the point where they can no longer support the top beam, replace the main pillar or eaves pillar with a new one. If the crack is small, wrap the outer surface of the main pillar or eaves pillar with soaked rattan and embed both ends of the rattan into the main pillar or eaves pillar, and then fix it with copper nails.

[0025] Compared with existing technologies, this invention provides a foundation reinforcement construction method based on the restoration of ancient buildings, which has the following beneficial effects:

[0026] 1. This invention provides a foundation reinforcement construction method based on the restoration of ancient buildings. Hollow steel pipes are buried in the earthen walls, sang piers, and eaves piers of the ancient building until the hollow steel pipes reach a solid load-bearing layer underground. Then, mortar is injected into the hollow steel pipes to enhance their strength. Galvanized steel brackets are used to connect the earthen walls, sang piers, and eaves piers. The hollow steel pipes support the galvanized steel brackets, thereby supporting the earthen walls, sang piers, and eaves piers. The overall structure can play a very good role in reinforcing the foundation of the ancient building.

[0027] 2. The present invention provides a foundation reinforcement construction method based on the restoration of ancient buildings, which uses rattan to reinforce the main pillars or eaves pillars of ancient buildings, which can prevent the main pillars or eaves pillars from cracking further, preserve the original main pillars and eaves pillars to the greatest extent, and preserve the authenticity of ancient buildings. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the method flow of the present invention;

[0029] Figure 2 This is an exploded view of the galvanized steel support, the capping component, and the hollow steel pipe of the present invention.

[0030] Figure 3This is a schematic diagram showing the connection between the hydraulic cylinder and the galvanized steel bracket of the present invention.

[0031] Figure 4 This is a schematic diagram of the reinforced structure of the present invention;

[0032] Figure 5 This is a schematic diagram of the reinforcement of the structural pillars or eaves pillars of the present invention.

[0033] Among them: 1. earthen fence; 2. golden mulberry mound; 3. eaves mulberry mound; 4. galvanized steel bracket; 41. base plate; 42. guide plate; 43. mounting plate; 5. cylinder bracket; 6. hydraulic cylinder; 7. hollow steel pipe; 8. guide hole; 9. capping component; 91. side plate; 92. cover plate; 93. side edge. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-5 A foundation reinforcement construction method based on the restoration of ancient buildings includes the following steps:

[0036] Step 1: Erect protective railings near the foundation of the ancient building to be repaired, and set up temporary fixed frames inside and outside the ancient building to support the top beams of the ancient building.

[0037] Step 2: Excavate the soil near the foundation of the ancient building, including the earthen wall 1, the golden mulberry mound 2, and the eaves mulberry mound 3, until the gray soil layer of the foundation of the ancient building is exposed on the surface. Cover the excavated soil with a film for temporary storage.

[0038] Step 3: Install galvanized steel brackets 4 on the sides of the earthen wall 1, the golden mulberry mound 2 and the eaves mulberry mound 3, then install hydraulic cylinder brackets 5 on the galvanized steel brackets 4, and install hydraulic cylinders 6 on the hydraulic cylinder brackets 5.

[0039] Step 4: Place the hollow steel pipe 7 inside the guide hole 8 of the galvanized steel bracket 4, and then use the hydraulic cylinder 6 to drive the hollow steel pipe 7 vertically into the soil. The two hollow steel pipes 7 can be connected by threads until the hollow steel pipe 7 reaches the solid load-bearing bottom layer below the soil.

[0040] Step 5: Drill holes in the outer surface of the uppermost hollow steel pipe 7, and then inject mortar into the hollow steel pipe 7 in sections at the drilled locations;

[0041] Step Six: After the cement mortar inside the hollow steel pipe 7 has dried, install the capping component 9 on the galvanized steel bracket 4 and remove the hydraulic cylinder bracket 5 to selectively reinforce the main pillars and eaves pillars of the ancient building.

[0042] Step 7: Mix insect repellent into the soil covered by the film, then backfill the soil back to the excavated location and remove the temporary support frame.

[0043] Specifically, temporary support frames are used to support the roof beams of ancient buildings. These frames are distributed horizontally and vertically, with a two-meter spacing between adjacent frames. The advantage is that before reinforcing the foundation of an ancient building, temporary support frames are erected to support its roof. These frames can be constructed using scaffolding or hydraulic supports, and their horizontal and vertical distribution at two-meter intervals effectively supports the roof beams.

[0044] Specifically, the galvanized steel bracket 4 comprises a base plate 41, a guide plate 42, and a mounting plate 43. One end of the base plate 41 is fixedly connected to the guide plate 42, and the upper surface of the guide plate 42 is fixedly connected to the mounting plate 43. A guide hole 8 is formed through the upper surface of the guide plate 42, and at least two circular holes are formed through the outer surface of the mounting plate 43. The advantage is that after excavation beside the earthen wall 1, the golden mulberry mound 2, and the eaves mulberry mound 3 until the lime-soil layer of the ancient building foundation is exposed, the galvanized steel bracket 4 is inserted at equal intervals below the earthen wall 1, the golden mulberry mound 2, and the eaves mulberry mound 3, and fixed with expansion bolts. After the galvanized steel bracket 4, the hollow steel pipe 7, and the capping component 9 are installed, they can provide support for the earthen wall 1, the golden mulberry mound 2, and the eaves mulberry mound 3. The hydraulic cylinder bracket 5 is then fixed to both sides of the guide plate 42 using bolts, completing the connection between the galvanized steel bracket 4 and the hydraulic cylinder bracket 5.

[0045] Specifically, the guide plate 42 has screw holes on both sides, and the guide plate 42 is connected to the cylinder bracket 5 by bolts. A hydraulic cylinder 6 is installed at the top center of the cylinder bracket 5, and the hollow steel pipe 7 is clearance-fitted with the guide hole 8. The advantage is that after the cylinder bracket 5 is installed on the galvanized steel bracket 4, the hydraulic cylinder 6 stands above the guide plate 42. A hollow steel pipe 7 is passed through the guide hole 8 and vertically placed below the excavated foundation. Then, the hydraulic cylinder 6 is used to drive the hollow steel pipe 7 into the ground. Subsequently, a new hollow steel pipe 7 is connected to the buried hollow steel pipe 7, and then driven into the ground again, until multiple hollow steel pipes 7 are connected and reach a solid load-bearing subsidence point underground. As the hollow steel pipes 7 are continuously driven in, they can exert a reaction force on the hydraulic cylinder 6, causing the cylinder bracket 5 to drive the galvanized steel bracket 4 to lift the collapsed foundation, thereby gradually repairing the foundation.

[0046] Specifically, the hollow steel pipe 7 is one meter long, and two hollow steel pipes 7 are connected by threads. The outer surface of the hollow steel pipe 7 is coated with an anti-corrosion layer, with a diameter of 60mm and a wall thickness of 5mm. The advantages are that the top of the hollow steel pipe 7 has external threads, the bottom has internal threads, two hollow steel pipes 7 can be threaded together, the anti-corrosion coating on the outer surface has good weather resistance, and its hollow interior is used for subsequent grouting to increase support.

[0047] Specifically, the mortar composition includes cement, fly ash, sand, water, and a quick-drying agent. The mortar mix ratio is 1 part cement to 1 part fly ash to 1.5 parts sand to 0.5 parts water to 0.005 parts quick-drying agent. The advantages are that the mortar, made from a mixture of cement, fly ash, sand, water, and a quick-drying agent, has good strength after drying and setting, and the addition of the quick-drying agent accelerates the drying process.

[0048] Specifically, the segmented grouting involves injecting grout in two stages. After the first injection, a two-hour wait is required before the second injection. Grouting stops once the grout overflows from the top hollow steel pipe 7. The advantage is that a grouting pump is used to inject grout through grouting holes on the outer surface of the top hollow steel pipe 7. The grouting pressure is calculated using the formula: P = (F / A) + gH, where P is the grouting pressure, F is the frictional force of the grouting fluid on the wall surface, A is the total pipe area of ​​the hollow steel pipe 7, g is the gravitational acceleration during grouting, and H is the grouting height, i.e., the depth to which the hollow steel pipe 7 is embedded. The first injection involves injecting half the amount of grout, and the second injection is performed after drying. This facilitates rapid drying of the grout at the bottom of the hollow steel pipe 7.

[0049] Specifically, the capping component 9 comprises a side plate 91, a cover plate 92, and side edges 93. The bottom end of the side plate 91 is fixedly connected to the cover plate 92, and the two sides of the cover plate 92 are fixedly connected to the side edges 93. A circular hole is opened through the outer surface of the side plate 93. The advantage is that after the mortar inside the hollow steel pipe 7 is completely dry, the hydraulic cylinder 6 is removed from the cylinder bracket 5, then bolts are inserted into the side plate 93 to connect it to the guide plate 42, then the side plate 91 is connected to the mounting plate 43, and the cover plate 92 seals the guide hole 8, thus completing the connection of the galvanized steel bracket 4, the capping component 9, and the hollow steel pipe 7, thereby reinforcing the foundation of the ancient building.

[0050] Specifically, step six involves selectively reinforcing the main pillars and eaves pillars of the ancient building, including the following:

[0051] Inspect the outer surfaces of the main pillars and eaves pillars for cracks. If no cracks are found, no reinforcement is needed. If cracks are present and the pillars can no longer support the main beam, replace them with new ones. If the cracks are small, wrap soaked rattan around the outer surface of the main pillars or eaves pillars, inserting both ends of the rattan into the pillars, and then secure them with copper nails. The advantage is that the rattan needs to be soaked in water for at least 48 hours. Make a small hole in the main pillar or eaves pillar to insert the rattan, then wrap the rattan around it multiple times to tighten it and prevent further cracking. Finally, insert the ends of the rattan into the pillars and secure them with copper nails.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foundation reinforcement construction method based on the restoration of ancient buildings, characterized in that: Includes the following steps: Step 1: Erect protective railings near the foundation of the ancient building to be repaired, and set up temporary fixed frames inside and outside the ancient building to support the top beams of the ancient building. Step 2: Excavate the soil near the foundation of the ancient building (1), Jinsangdun (2) and Yansangdun (3) until the gray soil layer of the foundation of the ancient building is exposed on the surface. Cover the excavated soil with a film for temporary storage. Step 3: Install galvanized steel brackets (4) on the sides of the earthen wall (1), the golden mulberry mound (2) and the eaves mulberry mound (3), then install the hydraulic cylinder bracket (5) on the galvanized steel bracket (4), and install the hydraulic cylinder (6) on the hydraulic cylinder bracket (5). Step 4: Place the hollow steel pipe (7) inside the guide hole (8) of the galvanized steel bracket (4), and then use the hydraulic cylinder (6) to drive the hollow steel pipe (7) vertically into the soil. The two hollow steel pipes (7) can be connected by threads until the hollow steel pipe (7) reaches the solid load-bearing bottom layer below the soil. Step 5: Drill holes in the outer surface of the uppermost hollow steel pipe (7), and then inject mortar into the hollow steel pipe (7) in sections at the drilled locations; Step 6: After the mortar inside the hollow steel pipe (7) dries, install the capping part (9) on the galvanized steel bracket (4) and remove the oil cylinder bracket (5) to selectively reinforce the main pillars and eaves pillars of the ancient building; Step 7: Mix insect repellent into the soil covered by the film, then backfill the soil back to the excavated location and remove the temporary fixing frame; The galvanized steel bracket (4) is composed of a base plate (41), a guide plate (42) and a mounting plate (43). One end of the base plate (41) is fixedly connected to the guide plate (42), and the upper surface of the guide plate (42) is fixedly connected to the mounting plate (43). A guide hole (8) is opened through the upper surface of the guide plate (42), and at least two round holes are opened through the outer surface of the mounting plate (43). The capping component (9) is composed of a side plate (91), a cover plate (92) and a side edge (93). The bottom end of the side plate (91) is fixedly connected to the cover plate (92), and the two sides of the cover plate (92) are fixedly connected to the side edge (93). A circular hole is opened through the outer surface of the side edge (93).

2. The foundation reinforcement construction method based on ancient building restoration according to claim 1, characterized in that: The temporary fixing frames support the top beams of the ancient building, and are distributed horizontally and vertically, with a spacing of two meters between each pair of adjacent temporary fixing frames.

3. The foundation reinforcement construction method based on ancient building restoration according to claim 1, characterized in that: The guide plate (42) has screw holes on both sides. The guide plate (42) is connected to the cylinder bracket (5) by bolts. The hydraulic cylinder (6) is installed at the top center of the cylinder bracket (5). The hollow steel pipe (7) is fitted with the guide hole (8) with clearance.

4. The foundation reinforcement construction method based on ancient building restoration according to claim 1, characterized in that: The hollow steel pipe (7) is one meter long, and two hollow steel pipes (7) are connected by threads. The outer surface of the hollow steel pipe (7) is coated with an anti-corrosion layer, with a diameter of 60 mm and a wall thickness of 5 mm.

5. The foundation reinforcement construction method based on ancient building restoration according to claim 1, characterized in that: The mortar is composed of cement, fly ash, sand, water and quick-drying agent. The mortar mix ratio is 1 part cement, 1 part fly ash, 1.5 parts sand, 0.5 parts water and 0.005 parts quick-drying agent.

6. The foundation reinforcement construction method based on ancient building restoration according to claim 1, characterized in that: The segmented grouting mortar includes grouting in two stages. After the first grouting, wait 2 hours before grouting the second grouting. Grouting is stopped after the grout overflows from the port of the uppermost hollow steel pipe (7).

7. The foundation reinforcement construction method based on ancient building restoration according to claim 1, characterized in that: Step six involves selectively reinforcing the main pillars and eaves pillars of the ancient building, specifically including the following: Check the outer surface of the main pillar and eaves pillar for cracks. If there are no cracks, no reinforcement is needed. If there are cracks that have reached the point where they can no longer support the top beam, replace the main pillar or eaves pillar with a new one. If the crack is small, wrap soaked rattan around the outer surface of the main pillar or eaves pillar and embed both ends of the rattan into the main pillar or eaves pillar, and then fix it with copper nails.

Images