Wall rebar planting method for repairing deteriorated brick eave on exterior wall of historical building

Abstract

Disclosed in the present invention is a wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building. The method comprises the following steps: digging out a wall hole at a wall position of an original deteriorated brick eave; cutting rebar planting grooves in upper wall and lower walls of the wall hole, and cutting a flow channel in an outer brick corresponding to the upper rebar planting groove; sleeving a locking piece on a rebar and then placing the rebar into the rebar planting grooves; injecting a mixed mortar into the lower rebar planting groove to fix the rebar; laying bricks in layers to the middle of the wall hole, forming a wall penetrating hole in an inner side wall of the wall hole, and a wall connecting piece passing through the wall penetrating hole and being fixed to the wall body; laying a brick layer in the middle of the wall hole, adjusting the position of the locking piece into a cavity of a brick, fixing the locking piece to the brick and then fixedly connecting the locking piece to the wall connecting piece by means of a connecting piece; continuing to lay bricks, and injecting the mixed mortar into the rebar planting groove and a cavity of the uppermost layer of brick by means of the flow channel; and after the mixed mortar is solidified, repairing the outer surface of the flow channel by using brick powder. According to the present invention, the repaired brick eave structure is more stable, and the impact on the original appearance of the exterior wall of the historical building is smaller.

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of historical building restoration, and in particular to a wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building.BACKGROUND

[0002] The Yangshupu Industrial Zone, located on the Yangpu Riverfront in Shanghai, is an important industrial base in modem China. It is known as the "Corridor of Modern Chinese Industrial Civilization" and was once called "the world's only remaining industrial rust belt" by UNESCO. The industrial heritage historical buildings here hold an important place in the history of China's modern industrial development. However, due to years of disrepair, weathering, rain erosion, etc., many parts of the fair-faced brick wall of the external facade are damaged, especially the overhanging brick eaves structure of the fair-faced brick wall, which is severely damaged, resulting in the destruction of the original appearance of the historical buildings and requiring urgent restoration.

[0003] During the repair work on deteriorated brick eaves, in order to increase the horizontal tensile strength of the bricks, it is necessary to plant rebars through the bricks. However, conventional reinforcement methods tend to be external reinforcement. Due to the original appearance requirements of the external facade of the historical building, the external reinforcement method cannot be used. However, internal reinforcement methods may face the problem of limited space of a wall opening.SUMMARY OF THE INVENTION

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention proposes a wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building. The method can not only provide sufficient horizontal tensile force for the bricks after the deteriorated brick eave is repaired without damaging the original appearance of the historical buildings as much as possible, but also reduce the impact of strength reduction caused by wall damage during the construction.

[0005] Based on the above invention objectives, the present invention provides the following technical solutions: A wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building, wherein the method comprises the following steps: S1, removing the deteriorated brick eave and digging out a wall opening at a location where the deteriorated brick eave situated; S2, cutting an upper rebar groove and a lower rebar groove at a location where a rebar is to be implanted, and cutting a flow channel in an outer brick corresponding to the upper rebar groove in an upper wall of the wall opening, wherein one end of the flow channel is in communication with the upper rebar groove, and the other end of the flow channel is situated on an outer surface of the wall; S3, sleeving a locking piece on the rebar through a center hole of the locking piece and placing the rebar through the flow channel into the upper and lower rebar grooves, calibrating a position of the rebar and making temporary support and fixation; S4, injecting a mixed mortar into the lower rebar groove in a lower wall of the wall opening so that the rebar is fixed after the mixed mortar is solidified; S5, laying brick layers from bottom to top inside the wall opening, wherein each brick layer is provided with a cavity for accommodating the rebar, forming a through hole that penetrates an inner wall of the wall opening at a mid-position corresponding to the rebar, and fixing an end of a wall connecting piece to the wall after the end of the wall connecting piece passes through the through hole; S6, laying a brick layer at a mid-position of the wall opening, adjusting a position of a locking piece into the cavity of the brick layer, fixing the locking piece to the brick, and then fixedly connecting the locking piece to the wall connecting piece by means of a connecting member; S7, continuing to lay brick layers until the wall opening is completely filled and the brick eave is reformed, injecting the mixed mortar through the flow channel into the upper rebar groove located in the upper wall of the wall opening and a cavity in an uppermost brick layer; S8, after the mixed mortar is solidified, repairing an outer surface of the flow channel by using brick powder.

[0006] Furthermore, the rebar has a length that satisfies: L+S<G<L+2S, where L is a height of the wall opening, S is a depth of the rebar groove, and G is a length of the rebar.

[0007] Furthermore, the length of the rebar satisfies: L+S+A<G<L+2S, where A is a depth of the flow channel.

[0008] Furthermore, the rebar is a full-threaded steel bar and the cavity has a square cross-sectional shape.

[0009] Furthermore, the locking piece is a four-claw nut including the center hole, three fixing claws and a connecting rod, wherein the center hole is provided with an internal thread matching an external thread of the full-threaded steel bar, and the three fixing claws and the connecting rod are evenly distributed around the center hole at equal spacings, wherein each fixing claw includes a screw rod and a support nut, wherein an end of the connecting rod not connected to the center hole is provided with a connecting hole having a central axis that is parallel to a central axis of the full-threaded steel bar.

[0010] Furthermore, the wall connecting piece includes a fixation hole, a wall penetrating rod and a fixation nut, wherein the wall penetrating rod passes through the wall via the through hole, wherein the fixation hole is provided at one end of the wall penetrating rod close to the wall opening and has a central axis that is parallel to the central axis of the full-threaded steel bar, wherein an external thread is provided at the other end of the wall penetrating rod, and the wall connecting piece is fixed to the wall by the fixation nut.

[0011] Furthermore, the connecting member is a U-shaped steel bar.

[0012] Furthermore, in step S6, adjusting a position of the locking piece into the cavity of the brick layer, fixing the locking piece to the brick, and then fixedly connecting the locking piece to the wall connecting piece by means of the connecting member specifically includes the following steps: S61, rotating the locking piece until the locking piece is entirely located inside the cavity and the connecting rod is perpendicular to the inner wall of the wall opening, such that the screw rod of each of the three fixing claws is perpendicular to a corresponding side face of the cavity; S62, rotating the support nut toward an exterior until the support nut is in close contact with the corresponding side face of the cavity, so that the locking piece is fixedly supported on the brick; S63, fixedly connecting the locking piece to the wall connecting piece by inserting two ends of the U-shaped steel bar into the connection hole and the fixation hole respectively; S64, rotating the fixation nut until the locking piece is firmly fixed to the wall connecting piece.

[0013] Furthermore, the wall connecting piece further includes a steel plate and a combined washer, wherein the steel plate and the combined washer are disposed between the fixation nut and the wall, wherein a thickness of the steel plate is 5 mm.

[0014] Based on the above technical solutions, the present invention has the following advantages compared to the prior art: the present invention creates a space for vertical placement of a rebar through the arrangement of a flow channel and rebar grooves, and increases the tensile force between the rebar and bricks by means of locking pieces and pouring mixed mortar. In addition, a wall connecting piece and a connecting member are arranged to connect with the rebar to further increase the horizontal tensile force, thereby ensuring the horizontal tensile strength of the repaired brick eave. At the same time, the impact on the original appearance of the exterior wall of the historical building is relatively small.BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG. 1 is a perspective view of a groove cut from a vertical surface of a header brick in an upper wall of a wall opening according to an embodiment of the present invention. FIG. 2 is a perspective view of a groove cut from a vertical surface of a stretcher brick in the upper wall of the wall opening according to an embodiment of the present invention. FIG. 3 is a schematic structural diagram of a header brick in a lower wall of the wall opening after grouting in accordance with an embodiment of the present invention. FIG. 4 is a schematic structural diagram of a stretcher brick in the lower wall of the wall opening after grouting in accordance with an embodiment of the present invention. FIG. 5 is a schematic diagram of a rebar connection in the case of a stretcher brick in the upper wall and a stretcher brick in the lower wall in accordance with an embodiment of the present invention. FIG. 6 is a schematic diagram of a rebar connection in the case of a header brick in the upper wall and a stretcher brick in the lower wall in accordance with an embodiment of the present invention. FIG. 7 is a schematic diagram of a rebar connection in the case of a header brick in the upper wall and a header brick in the lower wall in accordance with an embodiment of the present invention. FIG. 8 is a schematic diagram of a rebar connection in the case of a stretcher brick in the upper wall and a header brick in the lower wall in accordance with an embodiment of the present invention. FIG. 9 is a schematic diagram showing the connection between a locking piece and a header brick in accordance with an embodiment of the present invention. FIG. 10 is a schematic diagram showing the connection between the locking piece and a stretcher brick in accordance with an embodiment of the present invention. FIG. 11 is a schematic diagram of the brick eave structure after the repairment in accordance with an embodiment of the present invention. FIG. 12 is a schematic structural diagram of the locking piece in accordance with an embodiment of the present invention. FIG. 13 is a schematic structural diagram of a connecting member in accordance with an embodiment of the present invention. FIG. 14 is a schematic structural diagram showing the connection among the locking piece, the connecting member and a wall connecting piece in accordance with an embodiment of the present invention. FIG. 15 is a top view of the wall connecting piece in accordance with an embodiment of the present invention. FIG. 16 is a front view of the wall connecting piece in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific examples, in order to provide a clearer understanding of its structural type and usage, but this shall not limit the scope of protection of the present invention.

[0017] A wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building, the method comprising the following steps: S1, removing the deteriorated brick eave and digging out a wall opening at a location where the deteriorated brick eave situated. The height and width of the wall opening match the height and width of the deteriorated brick eave. S2, cutting an upper and a lower rebar groove 1 at a location where a rebar is to be implanted, and cutting a flow channel 2 in an outer brick corresponding to the upper rebar groove 1 in an upper wall of the wall opening. One end of the flow channel 2 is in communication with the upper rebar groove 1, and the other end of the flow channel 2 is located on an outer surface of the wall. Use a portable cutting machine or angle grinder to cut off a portion of a brick of the upper wall and a brick of a lower wall and its bonding mortar to form a groove. The groove in the brick has a lateral position corresponding to half of a lateral span of the wall opening. The longitudinal cutting length of the brick is a whole brick length for a header brick or longitudinal 60mm extension on both sides from a center of a rebar 3 for a stretcher brick where the cut is perpendicular to the wall surface and the cutting line is C-shaped. After the cutting is completed, the cut brick portion and its bonding mortar are knocked off with a chisel along the cutting line. Use a portable cutting machine or angle grinder to open a flow channel 2 in the upper wall of the wall opening at a location from which a full-threaded steel bar is to be placed by cutting in a direction perpendicular to the wall surface. The flow channel 2 is cut to be in communication with the formed rebar groove 1, with a width of 15mm and a height of 30mm from the bottom edge of the cut brick. Clean up the garbage after chiseling and opening the flow channel 2. Place a bottom end of a full-threaded steel bar into the lower rebar groove 1 cut in the wall opening. Pivoting the full-threaded steel bar so that its top end passes through the flow channel 2 and is placed into the upper rebar groove 1. FIG. 1 and FIG. 2 show the structure of a cut brick in the upper wall of the wall opening in case of a header brick and a stretcher brick respectively. S3, sleeving a locking piece 4 on the rebar 3 through its center hole 5, and placing the rebar 3 into the upper and lower rebar grooves 1 through the flow channel 2, calibrating a position of the rebar 3 and making temporary support and fixation. The installation position of the full-threaded steel bar is set according to the brick module. It should be ensured that the newly installed brick eave has a first brick and a tail brick in the vertical direction tied by the rebar 3. The spacing between rebars 3 in the brick eave is not greater than 500mm. A Φ8 full-threaded steel bar is buried to a depth of 1 / 2 brick in the upper wall and to a depth of a whole brick plus a bonded mortar in the lower wall. S4, checking the position of the full-threaded steel bar, and temporarily support it using a wood or the like, pouring grouting material into the lower rebar groove 1, and burying the lower end of the full-threaded steel bar in the grouting material. The rebar 3 is fixed after the mixed mortar is solidified. FIG. 3 and FIG. 4 respectively show the brick structure in the lower wall of the wall opening after the grouting of a header brick and a stretcher brick is completed. Here, the grouting and fixing of the rebar 3 may have four forms which are respectively shown in FIGs. 5-8. S5, laying bricks layer by layer from bottom to top inside the wall opening. Each brick layer is provided with a cavity 6 for accommodating the rebar 3. The cavity 6 has a slot 7 on the side proximate the inner wall of the wall opening. When laying a brick layer, it is necessary to first align the slot 7 with the rebar 3 and push the brick layer toward until it is in close contact with the inner wall of the wall opening. At this time, the rebar 3 is located at the center of the cavity 6. Then, mixed mortar is poured and fills the cavity 6. Each brick layer is laid according to the above method. A through hole is drilled in the middle of the inner wall of the wall opening at a position corresponding to the position of the rebar 3. The through hole penetrates the wall. One end of a wall connecting piece 8 is passed through the through hole and fixed to the wall. S6, FIG. 9 and FIG. 10 respectively show schematic diagrams of a locking piece 4 installed in a header brick and a stretcher brick with the cavity 6. After the brick layer is laid inside the wall opening, the locking piece 4 is adjusted to a position within the cavity 6 of the brick. The locking piece 4 is then fixed to the brick. After the locking piece 4 is fixed to the brick, it is fixedly connected to the wall connecting piece 8 via a connecting member 9. S7, continuing to lay brick layers until the wall opening is completely filled and the brick eave is reformed, injecting the mixed mortar through the flow channel 2 into the rebar groove 1 and the cavity 6 of the uppermost brick of the wall opening. S8, after the mixed mortar is solidified, repairing an outer surface of the flow channel 2 with brick powder. FIG. 11 shows a schematic diagram of the brick eave after it is repaired.

[0018] Furthermore, the length of the rebar 3 satisfies the formula L+S<G<L+2S, where L is the height of the wall opening, S is the depth of the rebar groove 1, and G is the length of the rebar 3.

[0019] Furthermore, the length of the rebar 3 satisfies the formula L+S+A<G<L+2S, where A is the depth of the flow channel 2.

[0020] Furthermore, the rebar 3 is a full-threaded steel bar, and the cavity 6 has a square cross-section.

[0021] As shown in FIG. 12, the locking piece 4 is a four-claw nut, which includes a center hole 5, three fixing claws 10 and a connecting rod 11. The center hole 5 is provided with an internal thread matching an external thread of the full-threaded steel bar. The three fixing claws 10 and the connecting rod 11 are evenly distributed around the center hole 5 at equal intervals. Each fixing claw 10 includes a screw rod 12 and a support nut 13. The end of the connecting rod 11 that is not connected to the center hole 5 is provided with a connecting hole 14, and a central axis of the connecting hole 14 is parallel to a central axis of the full-threaded steel bar.

[0022] The wall connecting piece 8 includes a fixation hole 15, a wall penetrating rod 16 and a fixation nut 17. The wall penetrating rod 16 passes through the wall through the through hole. The fixation hole 15 is provided at one end of the wall penetrating rod 16 close to the wall opening. A central axis of the fixation hole 15 is parallel to the central axis of the full-threaded steel bar. An external thread is provided at the other end of the wall penetrating rod 16. The wall connecting piece 8 is fixed to the wall by the fixation nut 17.

[0023] As shown in FIG. 13, the connecting member 9 is a U-shaped steel bar.

[0024] As shown in FIG. 14, in step S6, the locking piece 4 is adjusted to be within the cavity 6 of the brick, and then the locking piece 4 is fixed to the brick. After the locking piece 4 is fixed to the brick, the method of fixing the locking piece 4 to the wall connecting piece 8 via the connecting member 9 specifically includes the following steps: S61, rotating the locking piece 4 until the locking piece 4 is entirely located inside the cavity 6 and the connecting rod 11 is perpendicular to the inner wall of the wall opening such that the screw rod 12 of each of the three fixing claws 10 is perpendicular a corresponding side face of the cavity 6. S62, rotating the support nut 13 toward an exterior until the support nut 13 is in close contact with the corresponding side face of the cavity 6, so that the locking piece 4 is fixedly supported on the brick. S63, fixedly connecting the locking piece 4 to the wall connecting piece 8 by inserting two ends of the U-shaped steel bar into the connection hole 14 and the fixation hole 15 respectively. S64, rotating the fixation nut 17 until the locking piece 4 is firmly fixed to the wall connecting piece 8.

[0025] Furthermore, as shown in FIG. 15 and FIG. 16, the wall connecting piece 8 further includes a steel plate 18 and a combined washer 19. The steel plate 18 and the combined washer 19 are disposed between the fixation nut 17 and the wall. The thickness of the steel plate 18 is 5 mm.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Examples

Embodiment Construction

[0016]The present invention will be further described in detail below with reference to the accompanying drawings and specific examples, in order to provide a clearer understanding of its structural type and usage, but this shall not limit the scope of protection of the present invention.

[0017]A wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building, the method comprising the following steps:

S1, removing the deteriorated brick eave and digging out a wall opening at a location where the deteriorated brick eave situated. The height and width of the wall opening match the height and width of the deteriorated brick eave. S2, cutting an upper and a lower rebar groove 1 at a location where a rebar is to be implanted, and cutting a flow channel 2 in an outer brick corresponding to the upper rebar groove 1 in an upper wall of the wall opening. One end of the flow channel 2 is in communication with the upper rebar groove 1, and the o...

TECHNICAL FIELD

[0001] The present invention relates to the field of historical building restoration, and in particular to a wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building.BACKGROUND

[0002] The Yangshupu Industrial Zone, located on the Yangpu Riverfront in Shanghai, is an important industrial base in modem China. It is known as the "Corridor of Modern Chinese Industrial Civilization" and was once called "the world's only remaining industrial rust belt" by UNESCO. The industrial heritage historical buildings here hold an important place in the history of China's modern industrial development. However, due to years of disrepair, weathering, rain erosion, etc., many parts of the fair-faced brick wall of the external facade are damaged, especially the overhanging brick eaves structure of the fair-faced brick wall, which is severely damaged, resulting in the destruction of the original appearance of the historical buildings and requiring urgent restoration.

[0003] During the repair work on deteriorated brick eaves, in order to increase the horizontal tensile strength of the bricks, it is necessary to plant rebars through the bricks. However, conventional reinforcement methods tend to be external reinforcement. Due to the original appearance requirements of the external facade of the historical building, the external reinforcement method cannot be used. However, internal reinforcement methods may face the problem of limited space of a wall opening.SUMMARY OF THE INVENTION

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention proposes a wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building. The method can not only provide sufficient horizontal tensile force for the bricks after the deteriorated brick eave is repaired without damaging the original appearance of the historical buildings as much as possible, but also reduce the impact of strength reduction caused by wall damage during the construction.

[0005] Based on the above invention objectives, the present invention provides the following technical solutions: A wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building, wherein the method comprises the following steps: S1, removing the deteriorated brick eave and digging out a wall opening at a location where the deteriorated brick eave situated; S2, cutting an upper rebar groove and a lower rebar groove at a location where a rebar is to be implanted, and cutting a flow channel in an outer brick corresponding to the upper rebar groove in an upper wall of the wall opening, wherein one end of the flow channel is in communication with the upper rebar groove, and the other end of the flow channel is situated on an outer surface of the wall; S3, sleeving a locking piece on the rebar through a center hole of the locking piece and placing the rebar through the flow channel into the upper and lower rebar grooves, calibrating a position of the rebar and making temporary support and fixation; S4, injecting a mixed mortar into the lower rebar groove in a lower wall of the wall opening so that the rebar is fixed after the mixed mortar is solidified; S5, laying brick layers from bottom to top inside the wall opening, wherein each brick layer is provided with a cavity for accommodating the rebar, forming a through hole that penetrates an inner wall of the wall opening at a mid-position corresponding to the rebar, and fixing an end of a wall connecting piece to the wall after the end of the wall connecting piece passes through the through hole; S6, laying a brick layer at a mid-position of the wall opening, adjusting a position of a locking piece into the cavity of the brick layer, fixing the locking piece to the brick, and then fixedly connecting the locking piece to the wall connecting piece by means of a connecting member; S7, continuing to lay brick layers until the wall opening is completely filled and the brick eave is reformed, injecting the mixed mortar through the flow channel into the upper rebar groove located in the upper wall of the wall opening and a cavity in an uppermost brick layer; S8, after the mixed mortar is solidified, repairing an outer surface of the flow channel by using brick powder.

[0006] Furthermore, the rebar has a length that satisfies: L+S<G<L+2S, where L is a height of the wall opening, S is a depth of the rebar groove, and G is a length of the rebar.

[0007] Furthermore, the length of the rebar satisfies: L+S+A<G<L+2S, where A is a depth of the flow channel.

[0008] Furthermore, the rebar is a full-threaded steel bar and the cavity has a square cross-sectional shape.

[0009] Furthermore, the locking piece is a four-claw nut including the center hole, three fixing claws and a connecting rod, wherein the center hole is provided with an internal thread matching an external thread of the full-threaded steel bar, and the three fixing claws and the connecting rod are evenly distributed around the center hole at equal spacings, wherein each fixing claw includes a screw rod and a support nut, wherein an end of the connecting rod not connected to the center hole is provided with a connecting hole having a central axis that is parallel to a central axis of the full-threaded steel bar.

[0010] Furthermore, the wall connecting piece includes a fixation hole, a wall penetrating rod and a fixation nut, wherein the wall penetrating rod passes through the wall via the through hole, wherein the fixation hole is provided at one end of the wall penetrating rod close to the wall opening and has a central axis that is parallel to the central axis of the full-threaded steel bar, wherein an external thread is provided at the other end of the wall penetrating rod, and the wall connecting piece is fixed to the wall by the fixation nut.

[0011] Furthermore, the connecting member is a U-shaped steel bar.

[0012] Furthermore, in step S6, adjusting a position of the locking piece into the cavity of the brick layer, fixing the locking piece to the brick, and then fixedly connecting the locking piece to the wall connecting piece by means of the connecting member specifically includes the following steps: S61, rotating the locking piece until the locking piece is entirely located inside the cavity and the connecting rod is perpendicular to the inner wall of the wall opening, such that the screw rod of each of the three fixing claws is perpendicular to a corresponding side face of the cavity; S62, rotating the support nut toward an exterior until the support nut is in close contact with the corresponding side face of the cavity, so that the locking piece is fixedly supported on the brick; S63, fixedly connecting the locking piece to the wall connecting piece by inserting two ends of the U-shaped steel bar into the connection hole and the fixation hole respectively; S64, rotating the fixation nut until the locking piece is firmly fixed to the wall connecting piece.

[0013] Furthermore, the wall connecting piece further includes a steel plate and a combined washer, wherein the steel plate and the combined washer are disposed between the fixation nut and the wall, wherein a thickness of the steel plate is 5 mm.

[0014] Based on the above technical solutions, the present invention has the following advantages compared to the prior art: the present invention creates a space for vertical placement of a rebar through the arrangement of a flow channel and rebar grooves, and increases the tensile force between the rebar and bricks by means of locking pieces and pouring mixed mortar. In addition, a wall connecting piece and a connecting member are arranged to connect with the rebar to further increase the horizontal tensile force, thereby ensuring the horizontal tensile strength of the repaired brick eave. At the same time, the impact on the original appearance of the exterior wall of the historical building is relatively small.BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG. 1 is a perspective view of a groove cut from a vertical surface of a header brick in an upper wall of a wall opening according to an embodiment of the present invention. FIG. 2 is a perspective view of a groove cut from a vertical surface of a stretcher brick in the upper wall of the wall opening according to an embodiment of the present invention. FIG. 3 is a schematic structural diagram of a header brick in a lower wall of the wall opening after grouting in accordance with an embodiment of the present invention. FIG. 4 is a schematic structural diagram of a stretcher brick in the lower wall of the wall opening after grouting in accordance with an embodiment of the present invention. FIG. 5 is a schematic diagram of a rebar connection in the case of a stretcher brick in the upper wall and a stretcher brick in the lower wall in accordance with an embodiment of the present invention. FIG. 6 is a schematic diagram of a rebar connection in the case of a header brick in the upper wall and a stretcher brick in the lower wall in accordance with an embodiment of the present invention. FIG. 7 is a schematic diagram of a rebar connection in the case of a header brick in the upper wall and a header brick in the lower wall in accordance with an embodiment of the present invention. FIG. 8 is a schematic diagram of a rebar connection in the case of a stretcher brick in the upper wall and a header brick in the lower wall in accordance with an embodiment of the present invention. FIG. 9 is a schematic diagram showing the connection between a locking piece and a header brick in accordance with an embodiment of the present invention. FIG. 10 is a schematic diagram showing the connection between the locking piece and a stretcher brick in accordance with an embodiment of the present invention. FIG. 11 is a schematic diagram of the brick eave structure after the repairment in accordance with an embodiment of the present invention. FIG. 12 is a schematic structural diagram of the locking piece in accordance with an embodiment of the present invention. FIG. 13 is a schematic structural diagram of a connecting member in accordance with an embodiment of the present invention. FIG. 14 is a schematic structural diagram showing the connection among the locking piece, the connecting member and a wall connecting piece in accordance with an embodiment of the present invention. FIG. 15 is a top view of the wall connecting piece in accordance with an embodiment of the present invention. FIG. 16 is a front view of the wall connecting piece in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific examples, in order to provide a clearer understanding of its structural type and usage, but this shall not limit the scope of protection of the present invention.

[0017] A wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building, the method comprising the following steps: S1, removing the deteriorated brick eave and digging out a wall opening at a location where the deteriorated brick eave situated. The height and width of the wall opening match the height and width of the deteriorated brick eave. S2, cutting an upper and a lower rebar groove 1 at a location where a rebar is to be implanted, and cutting a flow channel 2 in an outer brick corresponding to the upper rebar groove 1 in an upper wall of the wall opening. One end of the flow channel 2 is in communication with the upper rebar groove 1, and the other end of the flow channel 2 is located on an outer surface of the wall. Use a portable cutting machine or angle grinder to cut off a portion of a brick of the upper wall and a brick of a lower wall and its bonding mortar to form a groove. The groove in the brick has a lateral position corresponding to half of a lateral span of the wall opening. The longitudinal cutting length of the brick is a whole brick length for a header brick or longitudinal 60mm extension on both sides from a center of a rebar 3 for a stretcher brick where the cut is perpendicular to the wall surface and the cutting line is C-shaped. After the cutting is completed, the cut brick portion and its bonding mortar are knocked off with a chisel along the cutting line. Use a portable cutting machine or angle grinder to open a flow channel 2 in the upper wall of the wall opening at a location from which a full-threaded steel bar is to be placed by cutting in a direction perpendicular to the wall surface. The flow channel 2 is cut to be in communication with the formed rebar groove 1, with a width of 15mm and a height of 30mm from the bottom edge of the cut brick. Clean up the garbage after chiseling and opening the flow channel 2. Place a bottom end of a full-threaded steel bar into the lower rebar groove 1 cut in the wall opening. Pivoting the full-threaded steel bar so that its top end passes through the flow channel 2 and is placed into the upper rebar groove 1. FIG. 1 and FIG. 2 show the structure of a cut brick in the upper wall of the wall opening in case of a header brick and a stretcher brick respectively. S3, sleeving a locking piece 4 on the rebar 3 through its center hole 5, and placing the rebar 3 into the upper and lower rebar grooves 1 through the flow channel 2, calibrating a position of the rebar 3 and making temporary support and fixation. The installation position of the full-threaded steel bar is set according to the brick module. It should be ensured that the newly installed brick eave has a first brick and a tail brick in the vertical direction tied by the rebar 3. The spacing between rebars 3 in the brick eave is not greater than 500mm. A Φ8 full-threaded steel bar is buried to a depth of 1 / 2 brick in the upper wall and to a depth of a whole brick plus a bonded mortar in the lower wall. S4, checking the position of the full-threaded steel bar, and temporarily support it using a wood or the like, pouring grouting material into the lower rebar groove 1, and burying the lower end of the full-threaded steel bar in the grouting material. The rebar 3 is fixed after the mixed mortar is solidified. FIG. 3 and FIG. 4 respectively show the brick structure in the lower wall of the wall opening after the grouting of a header brick and a stretcher brick is completed. Here, the grouting and fixing of the rebar 3 may have four forms which are respectively shown in FIGs. 5-8. S5, laying bricks layer by layer from bottom to top inside the wall opening. Each brick layer is provided with a cavity 6 for accommodating the rebar 3. The cavity 6 has a slot 7 on the side proximate the inner wall of the wall opening. When laying a brick layer, it is necessary to first align the slot 7 with the rebar 3 and push the brick layer toward until it is in close contact with the inner wall of the wall opening. At this time, the rebar 3 is located at the center of the cavity 6. Then, mixed mortar is poured and fills the cavity 6. Each brick layer is laid according to the above method. A through hole is drilled in the middle of the inner wall of the wall opening at a position corresponding to the position of the rebar 3. The through hole penetrates the wall. One end of a wall connecting piece 8 is passed through the through hole and fixed to the wall. S6, FIG. 9 and FIG. 10 respectively show schematic diagrams of a locking piece 4 installed in a header brick and a stretcher brick with the cavity 6. After the brick layer is laid inside the wall opening, the locking piece 4 is adjusted to a position within the cavity 6 of the brick. The locking piece 4 is then fixed to the brick. After the locking piece 4 is fixed to the brick, it is fixedly connected to the wall connecting piece 8 via a connecting member 9. S7, continuing to lay brick layers until the wall opening is completely filled and the brick eave is reformed, injecting the mixed mortar through the flow channel 2 into the rebar groove 1 and the cavity 6 of the uppermost brick of the wall opening. S8, after the mixed mortar is solidified, repairing an outer surface of the flow channel 2 with brick powder. FIG. 11 shows a schematic diagram of the brick eave after it is repaired.

[0018] Furthermore, the length of the rebar 3 satisfies the formula L+S<G<L+2S, where L is the height of the wall opening, S is the depth of the rebar groove 1, and G is the length of the rebar 3.

[0019] Furthermore, the length of the rebar 3 satisfies the formula L+S+A<G<L+2S, where A is the depth of the flow channel 2.

[0020] Furthermore, the rebar 3 is a full-threaded steel bar, and the cavity 6 has a square cross-section.

[0021] As shown in FIG. 12, the locking piece 4 is a four-claw nut, which includes a center hole 5, three fixing claws 10 and a connecting rod 11. The center hole 5 is provided with an internal thread matching an external thread of the full-threaded steel bar. The three fixing claws 10 and the connecting rod 11 are evenly distributed around the center hole 5 at equal intervals. Each fixing claw 10 includes a screw rod 12 and a support nut 13. The end of the connecting rod 11 that is not connected to the center hole 5 is provided with a connecting hole 14, and a central axis of the connecting hole 14 is parallel to a central axis of the full-threaded steel bar.

[0022] The wall connecting piece 8 includes a fixation hole 15, a wall penetrating rod 16 and a fixation nut 17. The wall penetrating rod 16 passes through the wall through the through hole. The fixation hole 15 is provided at one end of the wall penetrating rod 16 close to the wall opening. A central axis of the fixation hole 15 is parallel to the central axis of the full-threaded steel bar. An external thread is provided at the other end of the wall penetrating rod 16. The wall connecting piece 8 is fixed to the wall by the fixation nut 17.

[0023] As shown in FIG. 13, the connecting member 9 is a U-shaped steel bar.

[0024] As shown in FIG. 14, in step S6, the locking piece 4 is adjusted to be within the cavity 6 of the brick, and then the locking piece 4 is fixed to the brick. After the locking piece 4 is fixed to the brick, the method of fixing the locking piece 4 to the wall connecting piece 8 via the connecting member 9 specifically includes the following steps: S61, rotating the locking piece 4 until the locking piece 4 is entirely located inside the cavity 6 and the connecting rod 11 is perpendicular to the inner wall of the wall opening such that the screw rod 12 of each of the three fixing claws 10 is perpendicular a corresponding side face of the cavity 6. S62, rotating the support nut 13 toward an exterior until the support nut 13 is in close contact with the corresponding side face of the cavity 6, so that the locking piece 4 is fixedly supported on the brick. S63, fixedly connecting the locking piece 4 to the wall connecting piece 8 by inserting two ends of the U-shaped steel bar into the connection hole 14 and the fixation hole 15 respectively. S64, rotating the fixation nut 17 until the locking piece 4 is firmly fixed to the wall connecting piece 8.

[0025] Furthermore, as shown in FIG. 15 and FIG. 16, the wall connecting piece 8 further includes a steel plate 18 and a combined washer 19. The steel plate 18 and the combined washer 19 are disposed between the fixation nut 17 and the wall. The thickness of the steel plate 18 is 5 mm.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Examples

Embodiment Construction

[0016]The present invention will be further described in detail below with reference to the accompanying drawings and specific examples, in order to provide a clearer understanding of its structural type and usage, but this shall not limit the scope of protection of the present invention.

[0017]A wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building, the method comprising the following steps:

S1, removing the deteriorated brick eave and digging out a wall opening at a location where the deteriorated brick eave situated. The height and width of the wall opening match the height and width of the deteriorated brick eave. S2, cutting an upper and a lower rebar groove 1 at a location where a rebar is to be implanted, and cutting a flow channel 2 in an outer brick corresponding to the upper rebar groove 1 in an upper wall of the wall opening. One end of the flow channel 2 is in communication with the upper rebar groove 1, and the o...

Claims

1. A wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building, wherein the method comprises the following steps: S1, removing the deteriorated brick eave and digging out a wall opening at a location where the deteriorated brick eave situated; S2, cutting an upper rebar groove and a lower rebar groove at a location where a rebar is to be implanted, and cutting a flow channel in an outer brick corresponding to the upper rebar groove in an upper wall of the wall opening, wherein one end of the flow channel is in communication with the upper rebar groove, and the other end of the flow channel is situated on an outer surface of the wall; S3, sleeving a locking piece on the rebar through a center hole of the locking piece and placing the rebar through the flow channel into the upper and lower rebar grooves, calibrating a position of the rebar and making temporary support and fixation; S4, injecting a mixed mortar into the lower rebar groove in a lower wall of the wall opening so that the rebar is fixed after the mixed mortar is solidified; S5, laying brick layers from bottom to top inside the wall opening, wherein each brick layer is provided with a cavity for accommodating the rebar, forming a through hole that penetrates an inner wall of the wall opening at a mid-position corresponding to the rebar, and fixing an end of a wall connecting piece to the wall after the end of the wall connecting piece passes through the through hole; S6, laying a brick layer at a mid-position of the wall opening, adjusting a position of a locking piece into the cavity of the brick layer, fixing the locking piece to the brick, and then fixedly connecting the locking piece to the wall connecting piece by means of a connecting member; S7, continuing to lay brick layers until the wall opening is completely filled and the brick eave is reformed, injecting the mixed mortar through the flow channel into the upper rebar groove located in the upper wall of the wall opening and a cavity in an uppermost brick layer; S8, after the mixed mortar is solidified, repairing an outer surface of the flow channel by using brick powder.

2. The wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building according to claim 1, wherein the rebar has a length that satisfies: L+S<G<L+2S, where L is a height of the wall opening, S is a depth of the rebar groove, and G is a length of the rebar.

3. The wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building according to claim 2, wherein the length of the rebar satisfies: L+S+A<G<L+2S, where A is a depth of the flow channel.

4. The wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building according to claim 1, wherein the rebar is a full-threaded steel bar and the cavity has a square cross-sectional shape.

5. The wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building according to claim 4, wherein the locking piece is a four-claw nut including the center hole, three fixing claws and a connecting rod, wherein the center hole is provided with an internal thread matching an external thread of the full-threaded steel bar, and the three fixing claws and the connecting rod are evenly distributed around the center hole at equal spacings, wherein each fixing claw includes a screw rod and a support nut, wherein an end of the connecting rod not connected to the center hole is provided with a connecting hole having a central axis that is parallel to a central axis of the full-threaded steel bar.

6. The wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building according to claim 5, wherein the wall connecting piece includes a fixation hole, a wall penetrating rod and a fixation nut, wherein the wall penetrating rod passes through the wall via the through hole, wherein the fixation hole is provided at one end of the wall penetrating rod close to the wall opening and has a central axis that is parallel to the central axis of the full-threaded steel bar, wherein an external thread is provided at the other end of the wall penetrating rod, and the wall connecting piece is fixed to the wall by the fixation nut.

7. The wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building according to claim 6, wherein the connecting member is a U-shaped steel bar.

8. The wall rebar planting method for repairing a deteriorated brick eave of an exterior wall of a historical building according to claim 7, wherein in step S6, adjusting a position of the locking piece into the cavity of the brick layer, fixing the locking piece to the brick, and then fixedly connecting the locking piece to the wall connecting piece by means of the connecting member specifically includes the following steps: S61, rotating the locking piece until the locking piece is entirely located inside the cavity and the connecting rod is perpendicular to the inner wall of the wall opening, such that the screw rod of each of the three fixing claws is perpendicular to a corresponding side face of the cavity; S62, rotating the support nut toward an exterior until the support nut is in close contact with the corresponding side face of the cavity, so that the locking piece is fixedly supported on the brick; S63, fixedly connecting the locking piece to the wall connecting piece by inserting two ends of the U-shaped steel bar into the connection hole and the fixation hole respectively; S64, rotating the fixation nut until the locking piece is firmly fixed to the wall connecting piece.

9. The wall rebar planting method for repairing a deteriorated brick eave on an exterior wall of a historical building according to claim 6, wherein the wall connecting piece further includes a steel plate and a combined washer, wherein the steel plate and the combined washer are disposed between the fixation nut and the wall, wherein a thickness of the steel plate is 5 mm.

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