CN113431369A - Ancient building wall repairing method - Google Patents
Ancient building wall repairing method Download PDFInfo
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- CN113431369A CN113431369A CN202110747526.6A CN202110747526A CN113431369A CN 113431369 A CN113431369 A CN 113431369A CN 202110747526 A CN202110747526 A CN 202110747526A CN 113431369 A CN113431369 A CN 113431369A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000011449 brick Substances 0.000 claims abstract description 49
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000005507 spraying Methods 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 16
- 239000003973 paint Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000000428 dust Substances 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 8
- 238000005498 polishing Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000011835 investigation Methods 0.000 claims description 5
- 239000003595 mist Substances 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000003556 assay Methods 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
- E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0222—Replacing or adding wall ties
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0296—Repairing or restoring facades
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides the field of ancient building wall repairing methods, and relates to the technical field of cultural relic repairing. The ancient building based wall body repairing method comprises the following steps: measuring the damage of the wall body by using a field survey and ultrasonic detection technology, and submitting a damage report; collecting cultural relic data of the wall body, and planning and determining a repair scheme through the cultural relic data and the damage report; and transporting the repairing equipment to a repairing site according to the repairing scheme, and preparing and installing the repairing equipment at the repairing site. When the wall is seriously damaged, the inner side part of the original brick body is used for cutting and processing, the original brick body is used for compensating the damage of the wall as much as possible, and the original appearance of the wall can be recovered to the greatest extent by using the filled concrete inner core on the basis of ensuring the strength of the wall, so that the novelty of the invention is improved.
Description
Technical Field
The invention relates to the technical field of cultural relic repair, in particular to a method for repairing an ancient building wall.
Background
Many ancient buildings such as the Potala palace in China not only have a long history, but also have an important position in the world building history by the unique style and the historical significance, and have extremely high artistic achievement and scientific value; as with all other historical relics, the value of the ancient architecture lies in the historical remanence, which cannot be reproduced and reconstructed and cannot be recovered once being destroyed; however, in the course of time-lapse vicious preservation of ancient buildings, the damage caused by man-made and natural force is subject to different degrees, wherein the most common damage is that the walls of the ancient buildings are cracked, so that the repair of plugging the cracks of the ancient buildings according to the regulations of national cultural relics reparation under the condition of maintaining the original appearance of the ancient buildings as much as possible is a common repair means.
However, when a damaged wall body is repaired in the existing ancient building wall body repairing technology, a new brick body is needed to be used for filling the damaged part, the more seriously damaged wall body can be even overturned for reconstruction, and the original appearance of the ancient wall body cannot be guaranteed.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for repairing an ancient building wall, which solves the problems that when a damaged wall is repaired in the existing ancient building wall repairing technology, new bricks are needed to be used for filling the damaged part, the more seriously damaged wall can even be overturned and rebuilt, and the original appearance of the ancient wall cannot be ensured.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a method for repairing an ancient building wall comprises the following steps:
s1, determining wall damage through field investigation and ultrasonic detection technology, and submitting a damage report;
s2, collecting cultural relic data of the wall body, and planning and determining a repair scheme through the cultural relic data and the damage report;
s3, transporting the repairing equipment to a repairing site according to the repairing scheme, and preparing and installing the repairing equipment in the repairing site;
s4, supporting and fixing the wall to be repaired by using the steel bar support and the support plate, arranging water mist spraying equipment around the wall, cleaning the damaged part and the periphery of the damaged part by using equipment such as a brush water gun and the like, and removing dust and mud and then drying the dust and mud;
s5, firstly, pasting a protective film around the repaired part, polishing the wall skin around the damaged part until the wall brick is exposed, and reserving the ash discharge test and old-making part of the wall skin;
s6, repairing the wall according to the damage condition, waiting for the wall to be dried after curing and repairing are finished, and removing the supporting plate and the support after drying;
and S7, after the supporting plate and the support are removed, spraying waterproof paint on the repaired part by using spraying equipment, plastering wall skin mortar after the paint is dried, removing the protective film after the wall skin is dried, eliminating the color difference between the repaired part and the original wall skin by using the paint, and performing old making treatment by spraying the wall skin mortar.
Preferably, in the sixth step, the wall body is low in damage degree, when only the wall body cracks, the high-pressure air injection equipment is firstly utilized to inject air along the wall body cracks, internal dust is blown out, the high-pressure water gun is then utilized to inject high-pressure water flow along the cracks to clean mortar in the cracks, after the cleaning is finished, the high-pressure air injection equipment is used to blow out residual moisture and wait for drying, after the drying, the high-strength mortar is used to fill the cracks, and after the mortar is cured, the resin is utilized to perform flat joint treatment.
Preferably, in the sixth step, the damage degree of the wall body is high, when part of the wall bricks are damaged, the wall body is firstly reinforced again along the periphery of the damaged part of the wall body, the wall bricks around the damaged part of the wall body are dismantled, the positions of the original wall bricks are recorded, the inner side bricks of the rest wall bricks are cut by cutting equipment according to the damage degree of the wall body, the bricks are processed according to the condition of the damaged part, a steel reinforcement framework is erected inside the wall body, after concrete is filled on the steel reinforcement framework, the original wall bricks are firstly laid back to the original positions through high-strength mortar, the cut bricks are laid to the damaged positions according to the arrangement mode of the wall body, the repaired wall body is fixed by using a fixing plate and a support, and after the wall body is solidified, waterproof glue is filled at the brick joints.
Preferably, the concrete thickness is brick cutting thickness.
Preferably, in the step 5, the skin mortar is prepared by analyzing the skin composition according to the skin mortar assay part.
Preferably, in the step 5, when the wall body has no wall skin, the wall skin does not need to be treated.
Preferably, in the step 6, when the wall body has no wall skin, a high-pressure water gun and polishing equipment are needed to be used for carrying out similar weathering treatment on the inner side wall brick according to the weathering degree of the outer side wall body.
(III) advantageous effects
The invention provides a method for repairing an ancient building wall. The method has the following beneficial effects:
1. when the wall is seriously damaged, the inner side part of the original brick body is used for cutting and processing, the damage of the wall is compensated as much as possible by using the original brick body, and the original appearance of the wall can be recovered to the greatest extent by using the filled concrete inner core on the basis of ensuring the strength of the wall, so that the novelty of the invention is improved.
2. When no wall skin exists, the high-pressure water gun and the grinding equipment are used for carrying out similar weathering treatment on the inner side wall brick, the weathering degree of the wall body can be simulated, the phenomenon that after the wall body is repaired, obvious difference is generated, the repairing effect is influenced is prevented, and the practicability of the invention is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a method for repairing an ancient building wall, which comprises the following steps:
s1, determining wall damage through field investigation and ultrasonic detection technology, and submitting a damage report;
s2, collecting cultural relic data of the wall body, and planning and determining a repair scheme through the cultural relic data and the damage report;
s3, transporting the repairing equipment to a repairing site according to the repairing scheme, and preparing and installing the repairing equipment in the repairing site;
s4, supporting and fixing the wall to be repaired by using the steel bar support and the support plate, arranging water mist spraying equipment around the wall, cleaning the damaged part and the periphery of the damaged part by using equipment such as a brush water gun and the like, and removing dust and mud and then drying the dust and mud;
s5, firstly, pasting a protective film around the repaired part, polishing the wall skin around the damaged part until the wall brick is exposed, reserving the ash discharge test and old-making part of the wall skin, analyzing the components of the wall skin according to the ash discharge test part of the wall skin, and preparing wall skin mortar;
s6, the damage degree of the wall is low, when the wall is only a crack, firstly, high-pressure air injection equipment is used for injecting air along the crack of the wall to blow out internal dust, then, a high-pressure water gun is used for injecting high-pressure water flow along the crack to clean mortar in the crack, after the cleaning is finished, residual moisture is blown out through the high-pressure air injection equipment to wait for drying in the air, after the drying in the air, the crack is filled with high-strength mortar, after the mortar is cured, flat joint treatment is carried out through resin, after the curing and repairing are finished, the wall is waited for drying in the air, and after the drying in the air, a supporting plate and a support are detached;
and S7, after the supporting plate and the support are removed, spraying waterproof paint on the repaired part by using spraying equipment, plastering wall skin mortar after the paint is dried, removing the protective film after the wall skin is dried, eliminating the color difference between the repaired part and the original wall skin by using the paint, and performing old making treatment by spraying the wall skin mortar.
Example two:
the difference between the present embodiment and the first embodiment is: a method for repairing an ancient building wall comprises the following steps:
s1, determining wall damage through field investigation and ultrasonic detection technology, and submitting a damage report;
s2, collecting cultural relic data of the wall body, and planning and determining a repair scheme through the cultural relic data and the damage report;
s3, transporting the repairing equipment to a repairing site according to the repairing scheme, and preparing and installing the repairing equipment in the repairing site;
s4, supporting and fixing the wall to be repaired by using the steel bar support and the support plate, arranging water mist spraying equipment around the wall, cleaning the damaged part and the periphery of the damaged part by using equipment such as a brush water gun and the like, and removing dust and mud and then drying the dust and mud;
s5, firstly, pasting a protective film around the repaired part, polishing the wall skin around the damaged part until the wall brick is exposed, and reserving the ash discharge test and old-making part of the wall skin;
s6, the damage degree of the wall body is high, when part of the wall bricks are damaged, the wall body is firstly reinforced again along the periphery of the damaged part of the wall body, the wall bricks around the damaged part of the wall body are removed, the positions of the original wall bricks are recorded, the inner side bricks of the rest wall bricks are cut by cutting equipment according to the damage degree of the wall body, processing is carried out according to the condition of the damaged part, a steel reinforcement framework is erected inside the wall body, after concrete is filled on the steel reinforcement framework, the original wall bricks are firstly built back to the original positions through high-strength mortar, the cut brick bodies are built to the damaged positions according to the arrangement mode of the wall body, the repaired wall body is fixed by using a fixing plate and a bracket, after the wall body is cured, waterproof glue is filled at the brick joints, after the curing and repairing are finished, the wall body is waited to be dried, and the supporting plate and the bracket are removed after drying;
s7, after the supporting plate and the support are removed, spraying waterproof paint on the repaired part by using spraying equipment, plastering mortar on the wall skin after the paint is dried, removing the protective film after the wall skin is dried, eliminating the color difference between the repaired part and the original wall skin by using the paint, and then performing old finishing by spraying the mortar on the wall skin.
EXAMPLE III
The difference between the present embodiment and the first embodiment is: a method for repairing an ancient building wall comprises the following steps:
s1, determining wall damage through field investigation and ultrasonic detection technology, and submitting a damage report;
s2, collecting cultural relic data of the wall body, and planning and determining a repair scheme through the cultural relic data and the damage report;
s3, transporting the repairing equipment to a repairing site according to the repairing scheme, and preparing and installing the repairing equipment in the repairing site;
s4, supporting and fixing the wall to be repaired by using the steel bar support and the support plate, arranging water mist spraying equipment around the wall, cleaning the damaged part and the periphery of the damaged part by using equipment such as a brush water gun and the like, and removing dust and mud and then drying the dust and mud;
s5, firstly, pasting a protective film around the repaired part;
s6, the damage degree of the wall body is higher, when part of the wall bricks are damaged, the wall body is firstly reinforced again along the periphery of the damaged part of the wall body, the wall bricks around the damaged part of the wall body are dismantled, the position of the original wall bricks is recorded, the inner side bricks of the rest wall bricks are cut by cutting equipment according to the damage degree of the wall body, processing is carried out according to the condition of the damaged part, a steel reinforcement framework is erected in the wall body, after concrete is filled in the steel reinforcement framework, the original wall bricks are firstly built back to the original position through high-strength mortar, the cut brick bodies are built to the damaged position according to the arrangement mode of the wall body, a fixing plate and a bracket are used for fixing the repaired wall body, after the wall body is solidified, after waterproof glue is filled in the brick joints, the mortar is used for plugging, after the solidification and repair is finished, the wall body is dried, and then a supporting plate and the bracket are dismantled, when no wall skin exists, the high-pressure water gun and the polishing equipment are used for carrying out similar weathering treatment on the inner side wall bricks, so that the weathering degree of the wall body can be simulated, the obvious difference is prevented from being generated after the wall body is repaired, the repairing effect is influenced, and the practicability of the invention is improved;
and S7, after the support plate and the support are disassembled, spraying waterproof paint on the repaired part by using spraying equipment, disassembling the protective film, and eliminating the color difference between the repaired part and the original wall surface by using the paint.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A method for repairing an ancient building wall comprises the following steps:
s1, determining wall damage through field investigation and ultrasonic detection technology, and submitting a damage report;
s2, collecting cultural relic data of the wall body, and planning and determining a repair scheme through the cultural relic data and the damage report;
s3, transporting the repairing equipment to a repairing site according to the repairing scheme, and preparing and installing the repairing equipment in the repairing site;
s4, supporting and fixing the wall to be repaired by using the steel bar support and the support plate, arranging water mist spraying equipment around the wall, cleaning the damaged part and the periphery of the damaged part by using equipment such as a brush water gun and the like, and removing dust and mud and then drying the dust and mud;
s5, firstly, pasting a protective film around the repaired part, polishing the wall skin around the damaged part until the wall brick is exposed, and reserving the ash discharge test and old-making part of the wall skin;
s6, repairing the wall according to the damage condition, waiting for the wall to be dried after curing and repairing are finished, and removing the supporting plate and the support after drying;
and S7, after the supporting plate and the support are removed, spraying waterproof paint on the repaired part by using spraying equipment, plastering wall skin mortar after the paint is dried, removing the protective film after the wall skin is dried, eliminating the color difference between the repaired part and the original wall skin by using the paint, and performing old making treatment by spraying the wall skin mortar.
2. The method for repairing the ancient building wall according to claim 1, wherein the method comprises the following steps: and in the sixth step, the damage degree of the wall body is low, when the wall body is only in a crack, high-pressure air injection equipment is used for injecting air along the crack of the wall body to blow out internal dust, a high-pressure water gun is used for injecting high-pressure water flow along the crack to clean mortar in the crack, after the cleaning is finished, the high-pressure air injection equipment is used for blowing out residual moisture to wait for drying, after the drying, the crack is filled with high-strength mortar, and after the mortar is cured, resin is used for performing flat joint treatment.
3. The method for repairing the ancient building wall according to claim 1, wherein the method comprises the following steps: and sixthly, the damage degree of the wall body is high, when part of the wall bricks are damaged, the wall body is firstly reinforced again along the periphery of the damaged part of the wall body, the wall bricks around the damaged part of the wall body are dismantled, the positions of the original wall bricks are recorded, the inner side bricks of the rest wall bricks are cut by cutting equipment according to the damage degree of the wall body and are processed according to the condition of the damaged part, a steel reinforcement framework is erected inside the wall body, after concrete is filled on the steel reinforcement framework, the original wall bricks are firstly built back to the original positions through high-strength mortar, the cut bricks are built to the damaged positions according to the arrangement mode of the wall body, the repaired wall body is fixed by using a fixing plate and a support, and waterproof glue is filled at the brick joints after the wall body is solidified.
4. The method for repairing the ancient building wall according to claim 3, wherein the method comprises the following steps: the thickness of the concrete is the cutting thickness of the brick body.
5. The method for repairing the ancient building wall according to claim 1, wherein the method comprises the following steps: in the step 5, the wall skin mortar is prepared by analyzing the wall skin components according to the wall skin mortar assay part.
6. The method for repairing the ancient building wall according to claim 1, wherein the method comprises the following steps: in the step 5, when the wall body has no wall skin, the wall skin does not need to be processed.
7. The method for repairing the ancient building wall according to claim 3, wherein the method comprises the following steps: in the step 6, when the wall body has no wall skin, a high-pressure water gun and polishing equipment are needed to be used for carrying out similar weathering treatment on the inner side wall brick according to the weathering degree of the outer side wall body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110747526.6A CN113431369A (en) | 2021-07-02 | 2021-07-02 | Ancient building wall repairing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110747526.6A CN113431369A (en) | 2021-07-02 | 2021-07-02 | Ancient building wall repairing method |
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| CN113431369A true CN113431369A (en) | 2021-09-24 |
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| CN202110747526.6A Pending CN113431369A (en) | 2021-07-02 | 2021-07-02 | Ancient building wall repairing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030556A (en) * | 2022-07-20 | 2022-09-09 | 中国建筑第二工程局有限公司 | Method for repairing and reinforcing exposed brick exterior wall old building |
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| JPH05195634A (en) * | 1992-01-17 | 1993-08-03 | K F C:Kk | Exterior wall repairing method for building |
| DE102010036560A1 (en) * | 2010-07-22 | 2012-01-26 | Trowa Wallisch Gmbh | Holding unit for holding infrared dark radiator that is utilized for drying e.g. wall of room in older building, has holding pillar comprising outer and inner section rods that are mutually displaced and secured against each other |
| CN108104502A (en) * | 2017-12-27 | 2018-06-01 | 太原理工大学 | Ancient building brick wall surface protection and crack repairing method based on structural integrity |
| CN110067403A (en) * | 2019-05-14 | 2019-07-30 | 山东工艺美术学院 | Ancient building exterior wall restorative procedure |
| CN111608411A (en) * | 2020-04-29 | 2020-09-01 | 湖南南派古建园林工程有限公司 | Ancient building outer wall repairing method and system |
| CN111719881A (en) * | 2020-05-14 | 2020-09-29 | 龙德建设有限公司 | Integral reinforcing construction process for complex structure of ancient building |
-
2021
- 2021-07-02 CN CN202110747526.6A patent/CN113431369A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05195634A (en) * | 1992-01-17 | 1993-08-03 | K F C:Kk | Exterior wall repairing method for building |
| DE102010036560A1 (en) * | 2010-07-22 | 2012-01-26 | Trowa Wallisch Gmbh | Holding unit for holding infrared dark radiator that is utilized for drying e.g. wall of room in older building, has holding pillar comprising outer and inner section rods that are mutually displaced and secured against each other |
| CN108104502A (en) * | 2017-12-27 | 2018-06-01 | 太原理工大学 | Ancient building brick wall surface protection and crack repairing method based on structural integrity |
| CN110067403A (en) * | 2019-05-14 | 2019-07-30 | 山东工艺美术学院 | Ancient building exterior wall restorative procedure |
| CN111608411A (en) * | 2020-04-29 | 2020-09-01 | 湖南南派古建园林工程有限公司 | Ancient building outer wall repairing method and system |
| CN111719881A (en) * | 2020-05-14 | 2020-09-29 | 龙德建设有限公司 | Integral reinforcing construction process for complex structure of ancient building |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030556A (en) * | 2022-07-20 | 2022-09-09 | 中国建筑第二工程局有限公司 | Method for repairing and reinforcing exposed brick exterior wall old building |
| CN115030556B (en) * | 2022-07-20 | 2023-11-21 | 中国建筑第二工程局有限公司 | Repairing and reinforcing method for exposed wall old building of brick |
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Application publication date: 20210924 |
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