CN110469138B - Traditional rammed earth building repairing method and structure - Google Patents
Traditional rammed earth building repairing method and structure Download PDFInfo
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- CN110469138B CN110469138B CN201910725889.2A CN201910725889A CN110469138B CN 110469138 B CN110469138 B CN 110469138B CN 201910725889 A CN201910725889 A CN 201910725889A CN 110469138 B CN110469138 B CN 110469138B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002689 soil Substances 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 61
- 239000010959 steel Substances 0.000 claims description 61
- 230000008439 repair process Effects 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 7
- 238000007667 floating Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 239000000440 bentonite Substances 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 6
- 230000003628 erosive effect Effects 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 5
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000002708 enhancing effect Effects 0.000 claims description 5
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000008397 galvanized steel Substances 0.000 claims description 4
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 239000011449 brick Substances 0.000 claims description 3
- 238000005034 decoration Methods 0.000 claims description 3
- 239000010440 gypsum Substances 0.000 claims description 3
- 229910052602 gypsum Inorganic materials 0.000 claims description 3
- 239000010903 husk Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000010902 straw Substances 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims 1
- 238000005493 welding type Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 230000003014 reinforcing effect Effects 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 4
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 230000008030 elimination Effects 0.000 abstract description 3
- 238000003379 elimination reaction Methods 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 36
- 239000002023 wood Substances 0.000 description 5
- 235000011116 calcium hydroxide Nutrition 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000004567 concrete Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 241000209094 Oryza Species 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004111 Potassium silicate Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002308 calcification Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 238000005192 partition Methods 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- 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
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
Abstract
The invention discloses a traditional rammed earth building repairing method, which is characterized in that the traditional rammed earth building is repaired by combining a new modern material through the treatment of danger elimination, hoop reinforcement, wall body net hanging, waterproof spraying and buttress reinforcement, so that the effects of stable structure, good waterproof effect, good cracking prevention effect, integral attractive appearance and suitability for living are achieved; according to the traditional rammed earth building restoration structure, the mechanical property of the rammed earth building wall surface can be effectively improved through the three-layer soil layer; the integrity and strength of the wall can be enhanced through the arrangement of the wire netting; the repaired building has waterproof property through the waterproof layer; the anti-seismic performance of the building can be enhanced by arranging the buttress column, and the technical effect of keeping the whole structure of the house stable can be achieved; the integrity of the house can be enhanced through the hoops, the cost can be saved, the shearing force resisting effect can be achieved, and meanwhile, the hoops can also play a role in reinforcing the vertical through cracks of the wall body.
Description
Technical Field
The invention relates to the technical field of traditional rammed earth building repair, in particular to a traditional rammed earth building repair method and structure.
Background
The traditional rammed earth building adopts the original soil ramming of wooden splint, and traditional rammed earth building uses wooden partition as basis, and artificial compaction with original soil is poor to the resultance, and the wall drops easily, and water-proof effects is relatively poor. The main reasons are as follows: the manual ramming machine is even in ramming, the manual ramming is looser than the machine ramming, no waterproof material is added, and the waterproof performance is poor; the wall surface is not hung with a net and polyacrylamide is not added, so that the cracking prevention effect is poor. The traditional rammed earth building is difficult to combine with the modern waterproof, anti-cracking and anti-seismic technology.
In order to solve the problems, the traditional rammed earth building repairing method and structure are developed.
Disclosure of Invention
The invention aims to solve the problems and provide a traditional rammed earth building repairing method and structure.
The invention realizes the above purpose through the following technical scheme:
the traditional rammed earth building repairing method comprises the following steps:
s1, removing tiles of a roof;
s2, repairing the roof truss, the main girder, the purline and the rafters;
s3, repairing the ring beam;
s4, roof tile;
s5, repairing wall surface micro cracks and rain erosion stripping;
s6, repairing the vertical through cracks of the wall body and enhancing the integrity of the longitudinal and transverse walls;
s7, arranging buttress posts outside the wall body;
s8, wall strength enhancement and restoration of internal and external through cracks are carried out by hanging a net on the outer side of the outer wall for plastering;
and S9, spraying waterproof materials on the existing rammed earth wall surface.
Specifically, in step S1, a mode of internally taking a ladder and lowering a tile is adopted; in the step S2, repairing the roof truss, the girder, the purline and the rafters in a light steel wrapping and repairing mode; in step S3, newly building the ring beam by cement mortar; in the step S4, the upper tiles are alternately arranged in the front and back directions, a drainage ditch is reserved, and the eave is prolonged; in step S5, repairing is performed in advance on a wall body which is not locally peeled off due to a crack penetrating inside and outside and rain erosion on the wall surface: removing floating dust or virtual soil on the surface of the original wall, and repairing the wall surface by adopting triple soil for the part of the wall with the pits or cracks; and (3) chiseling bricks for the pits generated by obvious falling, and repairing with the triple soil for three times.
Further, the preparation and use steps of the bentonite are as follows:
s51, using local raw soil, and screening the selected soil by a 5mm sieve to obtain yellow mud; covering the soil below the screen with plastic cloth, and measuring the water content of the soil, wherein the water content is lower than 15%, so that the soil can be used;
s52, uniformly mixing chaff and yellow mud, and then humidifying, wherein the volume ratio of the chaff to the yellow mud is 2 to 1, and the earth is closed for not less than 24 hours after humidifying;
s53, cleaning floating dust or virtual soil on the surface of the wall body, and cleaning the wall body to an original foundation layer;
s54, according to the rice husk: yellow mud: lime=6: 3:1, uniformly stirring the mixture by using a stirrer to prepare slurry for repairing the wall surface, and adding fibrous roots, straw and polystyrene fabrics into the slurry, and adding sand, cement, gypsum and lime in a volume ratio of 10%;
s55, coating the bentonite on the original foundation layer and then sun-drying.
Specifically, in step S8, the steel wire mesh is tightly attached to the wall surface, the steel wire mesh is fixed to the rammed earth wall body by S-shaped wall penetrating ribs at evenly distributed points, and then the outside of the steel wire mesh is coated with mud for decoration.
Specifically, in step S6, a horizontal cuff is applied to the outer wall; the hoops are steel hoops with the thickness of 5mm, the width of 3.2mm and the weight of 2.5kg/m, the wall body is externally clamped inside and outside the steel hoops, bolts penetrate through the wall body for connection, and the upper, middle and lower channels are arranged on the wall body.
Specifically, in step S7, wall columns are arranged on the wall body with the wall length exceeding 6 meters, and wall bodies with the wall length partially exceeding 12 meters can be provided with wall columns at corners of the wall body and in the middle of the wall length, and the bottoms of the wall columns are connected with wall foundations; in the step S9, the supersaturated solution of calcium hydroxide is sprayed on the existing rammed earth wall surface, and after the construction is finished, the wall surface is subjected to moisture preservation and maintenance by using a plastic film, wherein the maintenance time is not less than 30 days.
Traditional rammed earth building repair structure includes:
a layer of triple soil; the three-layer soil layer is smeared on the surface of the foundation layer of the original building;
a wire netting; the wire netting is fixedly arranged on the wall surface coated with the three-layer soil layer;
a decorative mud layer; coating the decorative mud layer on the outer surface of the wire netting;
a waterproof layer; spraying the waterproof layer on the outer surface of the decorative mud layer;
buttress posts; the buttress posts are fixedly arranged at corners of the wall body and in the middle of the wall length;
a ferrule; the hoop is horizontally sleeved outside the wall surface.
Preferably, on the buttress, galvanized steel wires are horizontally pulled to form a net sheet along the height direction of the net sheet every 500 mm; the buttress column is consistent with the wall body in height.
Preferably, the buttress comprises a corner buttress and a wall buttress, the cross section of the corner buttress is formed into a 3/4 round shape, the cross section of the wall buttress is formed into a semicircular shape, and the corner buttress is wrapped at the corner of the wall; the wall body with the length of more than 12 meters is provided with a buttress column which is arranged in the middle of the length of the wall body.
Preferably, the steel wire mesh is a galvanized spot welding steel wire mesh, the diameter of steel wires is 2.6mm, the tensile strength is 711MPa, the distance between the steel wires is 25mm multiplied by 25mm, the steel wire mesh is fixed on a wall body through S-shaped wall penetrating ribs which are arranged in a plum blossom shape, the diameter of the S-shaped wall penetrating ribs is 6mm, and the distance is 800mm; the periphery of the steel wire mesh is connected with the wall body through tie bars; the gap between the steel wire mesh and the wall body is not more than 4mm.
The invention has the beneficial effects that:
according to the traditional rammed earth building repairing method, the traditional rammed earth building is repaired by combining the novel materials of danger elimination treatment, hoop reinforcement, wall body hanging net, waterproof spraying and buttress reinforcement, and the effects of stable structure, good waterproof effect, good cracking prevention effect, attractive overall appearance and suitability for living can be achieved;
according to the traditional rammed earth building restoration structure, the mechanical property of the rammed earth building wall surface can be effectively improved through the three-layer soil layer; the integrity and strength of the wall can be enhanced through the arrangement of the wire netting; the repaired building has waterproof property through the waterproof layer; the anti-seismic performance of the building can be enhanced by arranging the buttress column, and the technical effect of keeping the whole structure of the house stable can be achieved; the integrity of the house can be enhanced through the hoops, the cost can be saved, the shearing force resisting effect can be achieved, and meanwhile, the hoops can also play a role in reinforcing the vertical through cracks of the wall body.
Drawings
FIG. 1 is a plan view of a layer of a conventional rammed earth building after repair in the present application;
FIG. 2 is an enlarged schematic view of the portion a of FIG. 1;
FIG. 3 is a schematic view of a corner buttress in the present application;
FIG. 4 is an enlarged schematic view of the portion b of FIG. 1;
FIG. 5 is a front view of a conventional rammed earth building after repair in the present application;
FIG. 6 is a rear view of a conventional rammed earth building after repair in the present application;
FIG. 7 is a left side view of a conventional rammed earth building after repair in the present application;
fig. 8 is a right side view of a conventional rammed earth building after repair in the present application.
Wherein:
1-a wall body; 2-a ferrule; 3-buttress; 31-corner buttress; 32-wall buttress; 4-wire netting.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
embodiments, as shown in FIGS. 1-8;
the traditional rammed earth building repairing method comprises the following steps:
s1, removing tiles of a roof;
the roof tiles of the traditional rammed soil building are dismounted from top to bottom layer by layer in a mode of internally arranging a scaffold, and safety accidents are avoided by adopting a mode of internally building a ladder to lower the tiles.
S2, repairing the roof truss, the main girder, the purline and the rafters;
the unbroken or decayed roof truss, main girder (flat), purline and rafter are polished by gauze and then smeared with clear oil, and the anti-corrosion capability of the roof truss is enhanced and then the roof truss is used continuously. For roof trusses, main beams (bungalow), purlines and rafters which are damaged or have serious decay, the damaged severity can be repaired by cutting, replacing and wrapping steel (wrapping and reinforcing by circular steel with the diameter of the beam body).
S3, repairing the ring beam;
and replacing the bamboo-wood ring beam with reinforced concrete, and pouring the reinforced concrete ring beam on the wall top again.
S4, roof tile;
after repairing and installing roof trusses, purlines, rafters and the like, the damaged tiles of the roof are replaced, tiles (small green tiles) are covered on the roof in a positive and negative staggered mode, the upper tiles are alternately arranged in the positive and negative directions, drainage ditches are reserved, and the eave is prolonged.
S5, repairing wall surface micro cracks and rain erosion stripping; in step S5, the wall 1 is partially peeled off due to the crack which does not penetrate inside and outside the wall and the rain erosion, and is repaired in advance: removing floating dust or virtual soil on the surface of the original wall body 1, and repairing the wall surface by adopting triple soil for the part of the wall body 1 with the pits or cracks; for the depression generated by obvious falling, the brick type is chiseled, and is repaired by three times of combined soil (the repair is repeated for three times after sun drying).
The preparation and application steps of the bentonite are as follows:
s51, using local raw soil, and screening the selected soil by a 5mm sieve to obtain yellow mud; covering the soil below the screen with plastic cloth, and measuring the water content of the soil, wherein the water content is lower than 15%, so that the soil can be used;
s52, uniformly mixing chaff and yellow mud, and then humidifying, wherein the volume ratio of the chaff to the yellow mud is 2 to 1, and the earth is closed for not less than 24 hours after humidifying;
s53, cleaning floating dust or virtual soil on the surface of the wall body 1 until the floating dust or virtual soil is cleaned to an original foundation layer;
s54, according to the rice husk: yellow mud: lime=6: 3:1, uniformly stirring the slurry by using a stirrer to prepare slurry for repairing the wall surface, adding a small amount of fibrous roots, straws, polystyrene fabrics and the like into the slurry, and adding about 10% of modifying materials such as sand, cement, gypsum, lime and the like in a volume ratio to improve the mechanical property of the rammed earth building wall surface;
s55, coating the bentonite on the original foundation layer and then sun-drying.
S6, repairing the vertical through crack of the wall body 1 and enhancing the integrity of the longitudinal and transverse walls; a horizontal cuff 2 is applied to the outer wall.
The mode of applying the hoops 2 to the outer wall is adopted to enhance the integrity of the house, and meanwhile, the hoops 2 can also play a role in reinforcing the vertical through cracks of the wall body 1. Different specifications of wood hoops 2 or steel hoops 2 are selected. Taking the unit wall length into consideration the inertial force generated by the unit wall length on the wood sleeve hoop 2 and the steel sleeve hoop 2 under the action of horizontal earthquake, analyzing and calculating the internal force and the bending strength of the sleeve hoop 2. The specifications and economics of several calculated wood cuffs 2 and steel cuffs 2 are shown in the following table.
Comprehensively considering the transverse horizontal earthquake action, from the aspects of strength inspection and engineering cost, a section steel hoop 2 with proper size and specification are provided: the thickness is 5 mm/width is 3.2 mm/length 207.4m (calculated by the transverse total length of the actual wall 1 of the house to be repaired), and the theoretical weight is 2.5kg/m. The wall body 1 is clamped by the inner and outer layers of the steel hoops 2, bolts penetrate through the wall body 1 for connection, and the three layers are arranged in the middle and the lower layers, so that the requirement of the agriculture room on resisting 7-DEG earthquake intensity can be met.
The following is a theoretical calculation reinforcing material specification and cost table:
as can be seen from the table, the unequal limb angle steel with the model of 5/2.3 is adopted as the steel hoop 2, so that the price is low, and the requirements of repairing cracks, enhancing the integrity of the wall body 1 and enhancing the stability of the wall body 1 outside the plane can be met.
The unequal limb angle steel with the specification of 5/2.3 is adopted as the section steel hoop 2, each section steel hoop 2 adopts a double angle steel section type, the long limb edges of the two angle steels are symmetrically and respectively attached to the inner wall surface and the outer wall surface, the angle steel inside and outside the wall body 1 is anchored by a screw rod, and two section steel hoops 2 are arranged at the position of the three points of the height of the outer wall from top to bottom along the height of the outer wall.
S7, arranging a buttress column 3 outside the wall body 1; the wall body 1 with the wall length exceeding 6 meters is provided with buttress posts 3, the wall body 1 with the wall length exceeding 12 meters is partially provided with buttress posts 3 at the corners of the wall body 1 and in the middle of the wall length, and the bottoms of the buttress posts 3 are connected with the foundation of the wall body 1.
S8, reinforcing the strength of the wall body 1 and repairing inner and outer through cracks by hanging a net on the outer side of the outer wall for plastering; the steel wire mesh is tightly attached to the wall surface, S-shaped wall penetrating ribs are used for fixing the steel wire mesh to the rammed earth wall body 1 at evenly distributed points, and then mud is smeared on the outer side of the steel wire mesh for decoration.
And S9, spraying waterproof materials on the existing rammed earth wall surface. The supersaturated solution of calcium hydroxide is sprayed on the prior rammed earth wall surface, so that after the calcium hydroxide absorbed and permeated on the wall surface is carbonized with carbon dioxide in the air, a firm artificial calcification protective layer can be formed on the wall surface (or the wall body 1 is strengthened by the permeation of potassium silicate solution). After the construction is finished, the wall surface is subjected to moisture preservation and maintenance by using a plastic film, and the maintenance time is not less than 30 days.
Traditional rammed earth building repair structure includes:
a layer of triple soil; the three-layer soil layer is smeared on the surface of the foundation layer of the original building;
a wire netting 4; the wire netting 4 is fixedly arranged on the wall surface coated with the three-layer soil layer;
a decorative mud layer; the decorative mud layer is smeared on the outer surface of the wire netting 4;
a waterproof layer; spraying the waterproof layer on the outer surface of the decorative mud layer;
a buttress post 3; the buttress column 3 is fixedly arranged at the corner of the wall body 1 and in the middle of the wall length; the buttress 3 is made of wood or concrete, and the concrete is preferably made of C25 concrete;
a ferrule 2; the hoop 2 is horizontally sleeved outside the wall surface. The ferrule 2 is preferably a steel ferrule 2, gauge: the thickness is 5 mm/width is 3.2 mm/length 207.4m (calculated by the transverse total length of the actual wall 1 of the house to be repaired), and the theoretical weight is 2.5kg/m. The wall body 1 is clamped by the inner and outer layers of the steel hoops 2, bolts penetrate through the wall body 1 for connection, and the upper, middle and lower three channels can meet the requirement of the agriculture room on resisting 7-degree earthquake intensity.
The galvanized steel wires are horizontally pulled and tied to form a net sheet on the buttress column 3 along the height direction of the net sheet every 500 mm; the height of the buttress column 3 is consistent with that of the wall body 1.
The buttress column 3 comprises a corner buttress column 31 and a wall buttress column 32, wherein the cross section of the corner buttress column 31 is formed into a 3/4 round shape, the cross section of the wall buttress column 32 is formed into a semicircular shape, and the corner buttress column 31 is wrapped at the corner of the wall body 1; the wall body 1 with the length of more than 12 meters is provided, and the wall buttress 3 is arranged in the middle of the wall body length.
The steel wire mesh is a galvanized spot welding steel wire mesh, the diameter of the steel wire is 2.6mm, the tensile strength is 711MPa, the distance between the steel wires is 25mm multiplied by 25mm, the steel wire mesh is fixed on the wall body 1 through S-shaped wall penetrating ribs which are arranged in a plum blossom shape, the diameter of the S-shaped wall penetrating ribs is 6mm, and the distance is 800mm; the periphery of the steel wire mesh is connected with the wall body 1 by adopting tie bars; the gap between the steel wire mesh sheet and the wall body 1 is not more than 4mm.
The application is through atress analysis calculation, and the inequality limb angle steel that preferably adopts the specification to be 5/2.3 is as shaped steel hoop 2, and every shaped steel hoop 2 adopts double angle steel cross section type, and the long limb limit symmetry of two angle steels is pasted in interior and exterior wall respectively, and the angle steel that uses the screw rod to anchor inside and outside wall 1, along outer wall height from top to bottom in outer wall height trisection point position, establishes twice shaped steel hoop 2, consolidates wall 1, can practice thrift the cost and reach shearing force effect.
This application is with galvanized steel wire net full coverage link, then on the outside of wire netting 4 plastering mud decorates, combines the new material that forms with calcium hydrate supersaturated solution and gel mixed solution, has realized wall body 1 and has prevented ftracture, wall body 1 water-proof effects, and new material and wall body 1 are glued closely.
The present application should provide buttress posts 3 for walls 1 that are longer than 6 meters in length. The corner of the wall body 1 and the middle part of the wall length are provided with buttress posts 3, the bottom of each buttress post 3 is connected with the foundation of the wall body 1, and the wooden or cement buttress posts 3 are arranged, so that the earthquake resistance is enhanced, and the whole structure of the house is kept stable.
The method cuts in by the danger elimination treatment, finally forms a rammed earth repair atlas, forms a complete rammed earth repair process, can effectively control repair cost, can be copied and popularized, can save a large amount of expenses for the construction of national rural houses, and contributes to the vibration of villages.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. The traditional rammed earth building repairing method is characterized by comprising the following steps of:
s1, removing tiles of a roof;
s2, repairing the roof truss, the main girder, the purline and the rafters;
s3, repairing the ring beam;
s4, roof tile;
s5, repairing wall surface micro cracks and rain erosion stripping;
s6, repairing the vertical through cracks of the wall body and enhancing the integrity of the longitudinal and transverse walls;
s7, arranging buttress posts outside the wall body;
s8, wall strength enhancement and restoration of internal and external through cracks are carried out by hanging a net on the outer side of the outer wall for plastering;
s9, spraying waterproof materials on the existing rammed earth wall surface;
in the step S1, a mode of internally taking a ladder and descending a tile is adopted; in the step S2, repairing the roof truss, the girder, the purline and the rafters in a light steel wrapping and repairing mode; in step S3, newly building the ring beam by cement mortar; in the step S4, the upper tiles are alternately arranged in the front and back directions, a drainage ditch is reserved, and the eave is prolonged; in step S5, repairing is performed in advance on a wall body which is not locally peeled off due to a crack penetrating inside and outside and rain erosion on the wall surface: removing floating dust or virtual soil on the surface of the original wall, and repairing the wall surface by adopting triple soil for the part of the wall with the pits or cracks; for the concave generated by obvious falling, the brick type is chiseled, and is repaired by three times of combined soil;
the preparation and application steps of the bentonite are as follows:
s51, using local raw soil, and screening the selected soil by a 5mm sieve to obtain yellow mud; covering the soil below the screen with plastic cloth, and measuring the water content of the soil, wherein the water content is lower than 15%, so that the soil can be used;
s52, uniformly mixing chaff and yellow mud, and then humidifying, wherein the volume ratio of the chaff to the yellow mud is 2 to 1, and the earth is closed for not less than 24 hours after humidifying;
s53, cleaning floating dust or virtual soil on the surface of the wall body, and cleaning the wall body to an original foundation layer;
s54, according to the rice husk: yellow mud: lime=6: 3:1, uniformly stirring the mixture by using a stirrer to prepare slurry for repairing the wall surface, and adding fibrous roots, straw and polystyrene fabrics into the slurry, and adding sand, cement, gypsum and lime in a volume ratio of 10%;
s55, coating the bentonite on the original foundation layer and then sun-drying;
in the step S8, the steel wire mesh is tightly attached to the wall surface, S-shaped wall penetrating ribs are used for fixing the steel wire mesh to the rammed earth wall body at evenly distributed points, and then mud is smeared on the outer side of the steel wire mesh for decoration;
in step S6, applying a horizontal cuff to the outer wall; the hoops are steel hoops with the thickness of 5mm, the width of 3.2mm and the weight of 2.5kg/m, the steel hoops are internally and externally wrapped with wall bodies, bolts penetrate the wall bodies to connect, and the upper, middle and lower three channels are arranged on the wall bodies;
in the step S7, wall bodies with the wall length exceeding 6 meters are provided with buttress posts, wall bodies with the wall length exceeding 12 meters are locally provided with buttress posts at corners of the wall bodies and the middle part of the wall length, and the bottoms of the buttress posts are connected with wall foundations; in the step S9, the supersaturated solution of calcium hydroxide is sprayed on the existing rammed earth wall surface, and after the construction is finished, the wall surface is subjected to moisture preservation and maintenance by using a plastic film, wherein the maintenance time is not less than 30 days.
2. A conventional rammed earth building repair structure repaired by the conventional rammed earth building repair method according to claim 1, comprising:
a layer of triple soil; the three-layer soil layer is smeared on the surface of the foundation layer of the original building;
a wire netting; the wire netting is fixedly arranged on the wall surface coated with the three-layer soil layer;
a decorative mud layer; coating the decorative mud layer on the outer surface of the wire netting;
a waterproof layer; spraying the waterproof layer on the outer surface of the decorative mud layer;
buttress posts; the buttress posts are fixedly arranged at corners of the wall body and in the middle of the wall length;
a ferrule; the hoop is horizontally sleeved outside the wall surface.
3. The conventional rammed earth building repair structure according to claim 2, wherein the galvanized steel wire horizontal drawing net sheet is provided on the buttress column every 500mm in the height direction thereof; the buttress column is consistent with the wall body in height.
4. A conventional rammed earth building repair structure according to claim 2 or 3, wherein the buttress comprises corner buttress and wall buttress, the cross section of the corner buttress is formed in a 3/4 circle, the cross section of the wall buttress is formed in a semicircle, and the corner buttress is wrapped at a corner of the wall; the wall body with the length of more than 12 meters is provided with a wall buttress column at the middle part of the wall length.
5. The conventional rammed earth building repair structure according to claim 2, wherein the steel wire mesh is a galvanized spot welding type steel wire mesh, the steel wires have a diameter of 2.6mm, a tensile strength of 711MPa, a steel wire spacing of 25mm x 25mm, the steel wire mesh is fixed on the wall body by S-shaped wall penetrating ribs arranged in a quincuncial manner, the S-shaped wall penetrating ribs have a diameter of 6mm, and a spacing of 800mm; the periphery of the steel wire mesh is connected with the wall body through tie bars; the gap between the steel wire mesh and the wall body is not more than 4mm.
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| CN112696042A (en) * | 2020-12-11 | 2021-04-23 | 华南理工大学 | Repairing method for Hakka soil building structure |
| CN113789960B (en) * | 2021-10-19 | 2022-12-27 | 浙江异涂新材料有限公司 | Method for manufacturing rammed-soil-imitation building wall surface |
| CN114382311A (en) * | 2021-12-29 | 2022-04-22 | 上海建工四建集团有限公司 | Surface treatment method and spraying system for rammed earth wall |
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