CN111593902A - Wall surface crack prevention structure for joint of new wall body and old wall body and construction process - Google Patents
Wall surface crack prevention structure for joint of new wall body and old wall body and construction process Download PDFInfo
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- CN111593902A CN111593902A CN202010421393.9A CN202010421393A CN111593902A CN 111593902 A CN111593902 A CN 111593902A CN 202010421393 A CN202010421393 A CN 202010421393A CN 111593902 A CN111593902 A CN 111593902A
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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
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Abstract
The invention discloses a wall surface crack prevention structure of a joint part of a new wall body and an old wall body and a construction process, which belong to the field of house construction crack repair. The invention can be used for enhancing the combination firmness between the new wall and the old wall, solves the problem of cracking of the joint of the common new wall and the old wall, and ensures that the joint of the new wall and the old wall is not easy to crack.
Description
Technical Field
The invention relates to the technical field of house construction crack repair, in particular to a new and old wall body joint part wall surface crack prevention structure and a construction process.
Background
Because of different requirements of people on indoor decoration, a wall body is often newly built on the basis of an old wall in the decoration process, but after the wall body is usually built for a period of time, the joint part of the new wall body and the old wall body is often cracked due to low joint degree and inconsistent contraction of materials under the conditions of expansion with heat and contraction with cold and expansion with humidity and drying and shrinkage, and the generation of cracks not only influences the waterproofness of the structure, but also can generate certain potential safety hazards.
The Chinese patent with publication number CN109736473A discloses an anti-cracking structure for a new wall and an old wall at a joint, which comprises wall tie bars, wherein one ends of the wall tie bars are used for building a new wall and extending into the new wall, the other ends of the wall tie bars are used for forming an old wall and extending into the old wall, steel wire meshes are fixedly arranged on two sides of the joint of the new wall and the old wall, painting layers are arranged on two sides of the new wall and the old wall, and the steel wire meshes are positioned in the painting layers.
According to the anti-cracking structure for the joint part of the new wall body and the old wall body, the wall body tie bars are required to be provided with the holes in advance on the wall surface where the new wall body is connected with the old wall body during construction, then the wall body tie bars are inserted into the holes, construction gaps are easily reserved between the wall body tie bars and the holes, although the connection between the new wall body and the old wall body can be enhanced by the wall body tie bars after the new wall body is built, the connection and the connection degree between the wall body tie bars and the old wall body are not high, and therefore the anti-cracking effect of the joint part of the new wall body and the old wall body can be influenced.
Disclosure of Invention
The invention aims to provide a wall surface crack prevention structure at a joint of a new wall body and an old wall body, which has the effect of further reducing cracks generated at the joint of the new wall body and the old wall body.
The technical purpose of the invention is realized by the following technical scheme:
the utility model provides a new and old wall body joint portion wall crack control structure, includes new wall body, old wall body and follows the anchor connecting rod of new wall body height direction equipartition, the inside cavity of anchor connecting rod, the one end of anchor connecting rod inserts to old wall body orientation one side of new wall body, the other end extend to the surface of new wall body, a plurality of glue outlet holes have evenly been seted up along its extending direction to the lateral wall of anchor connecting rod, the embedment has the adhesive in the anchor connecting rod.
Through adopting above-mentioned technical scheme, when the new wall body is built, the adhesive of embedment can outwards spill over from going out the spliced eye in the anchor connecting rod, utilizes the adhesive can compensate the two degree of combining when the anchor connecting rod inserts old wall body, and the cementing agent also strengthens the degree of combining of anchor connecting rod and new wall body when building new wall body simultaneously, utilizes anchor connecting rod self as the connection carrier promptly, has improved the whole associativity of new and old wall body junction effectively to new and old wall body junction department produces the cracked possibility further reduced.
The present invention in a preferred example may be further configured to: the adhesive is any one of epoxy resin adhesive, polyvinyl acetal adhesive, chloroprene rubber adhesive or polysulfide rubber adhesive.
By adopting the technical scheme, the adhesive is suitable for bonding metal and non-metal materials, and can be used for realizing that the anchoring connecting rod is connected with a new wall body and an old wall body at the same time.
The present invention in a preferred example may be further configured to: the reinforced wall comprises a new wall body and an old wall body, wherein a reinforced net is fixedly arranged at the wall surface at the joint of the new wall body and the old wall body, a base surface layer is coated at the position, located on the outer side of the reinforced net, of the wall surface at the joint of the new wall body and the old wall body, a painting layer is coated outside the base surface layer, the reinforced net is alkali-resistant glass fiber gridding cloth, and the reinforced net is alkali-resistant glass fiber gridding cloth.
Through adopting above-mentioned technical scheme, alkali-resistant glass fiber net check cloth is a wall reinforcing material, and it can be used to strengthen the bonding firmness between wall and the base course to reduce the possibility that follow-up wall takes place the fracture.
The present invention in a preferred example may be further configured to: the painting layer comprises a putty layer, a latex paint layer and a finish paint layer which are arranged from inside to outside in sequence.
The invention also aims to provide a construction process for the wall surface crack prevention structure of the joint of the new wall body and the old wall body, which has the effect of preventing the joint of the new wall body and the old wall body from generating cracks.
The technical purpose of the invention is realized by the following technical scheme:
a construction process based on the wall surface crack prevention structure of the joint of the new wall body and the old wall body comprises the following construction steps:
s1, construction preparation: preparing bricks and cement mortar for bricking, and removing a lime layer on the side wall of the old wall body facing the new wall body;
s2, building a new wall: laying wall-building construction lines, building bricks from bottom to top, horizontally embedding one end of an anchoring connecting rod at one side of an old wall body facing a new wall body, placing the other end of the anchoring connecting rod on a brick block and extending to the surface of the new wall body, and then plastering cement mortar on the surface of the brick block to build an upper layer of bricks until the new wall body is built to the construction height;
s3, net hanging processing: removing a lime layer on the wall surface at the joint of the new wall body and the old wall body, preparing alkali-resistant glass fiber gridding cloth, attaching and fixing the alkali-resistant glass fiber gridding cloth at the joint of the new wall body and the old wall body, and troweling cement mortar outside the alkali-resistant glass fiber gridding cloth to form a base surface layer of the new wall body, wherein the combination width of the alkali-resistant glass fiber gridding cloth and the new wall body needs to be larger than the length of the anchoring connecting rod in the new wall body;
s4, pouring adhesive: injecting epoxy resin glue into the anchoring connecting rod by using an injector;
and S5, coating a painting layer on the surface of the new wall body processed by the S4, and finishing the final construction.
The present invention in a preferred example may be further configured to: the syringe includes injection urceolus and injection piston, injection piston swing joint is in the injection urceolus, the one end that the injection piston was kept away from to the injection urceolus is equipped with the connector that inserts to the connecting tube, the lateral wall of injection urceolus is equipped with the otic placode, the one end that the injection urceolus was kept away from to the injection piston is equipped with the limiting plate, the cover is equipped with the rubber band that is the shrink trend between limiting plate and the otic placode.
Through adopting above-mentioned technical scheme, handheld syringe of filling with epoxy glue makes the connector aim at with the one end opening of anchor connecting rod, utilizes the function of contracting of rubber band to make the epoxy glue in the syringe evenly fill steadily to the anchor connecting rod in, and the construction is comparatively convenient.
The present invention in a preferred example may be further configured to: the injection disc is arranged in the S4 before the adhesive is poured, the injection disc is fixed on the wall surface of a new wall body through cement mortar, one side of the injection disc is connected with an injection pipe communicated with the end part of the anchoring connecting rod, the other side of the injection disc is provided with a connecting pipe for inserting the connector, the injection disc is shoveled after the epoxy resin adhesive is poured and completely cured, and then S5 is carried out.
Through adopting above-mentioned technical scheme, the usable structure of injection dish is fixed from fashioned base surface layer, and the connecting pipe supplies the connector to insert the back again and can fix the syringe simultaneously to can realize the effect of epoxy glue automatic injection, accelerate the efficiency of construction, when the rubber band can't retract again alright show that the anchor connecting rod is interior to be filled up.
The present invention in a preferred example may be further configured to: in the step S1, a plurality of embedded grooves are chiseled along the height direction of the old wall body after the lime layer is removed from one side of the old wall body facing the new wall body, and the end parts of the bricks close to the old wall body in the step S2 are laid into the embedded grooves.
By adopting the technical scheme, after the new wall building brick part is inserted into the old wall body, the new wall body and the old wall body can be staggered and bitten at the joint, the firmness of the new wall body and the old wall body is enhanced, and the possibility of cracking at the joint of the new wall body and the old wall body is further reduced.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the hollow anchoring connecting rod can enhance the combination of a new wall and an old wall, and meanwhile, the combination integrity of the anchoring connecting rod and the old wall and the combination integrity of the anchoring connecting rod and the new wall can be further enhanced after the adhesive is poured in the anchoring connecting rod, so that the combination stability of the combination part of the new wall and the old wall is enhanced, and the possibility of the cracking of the combination part is reduced;
2. by arranging the alkali-resistant glass fiber mesh cloth, the combination of the wall surface and the base layer material can be enhanced, so that the possibility of cracking of the wall surface is further reduced;
3. through the setting of embedded groove, can make new and old wall body junction interlock each other, further increased the firm degree of combination of new and old wall body.
Drawings
FIG. 1 is a schematic view of a connection structure between a new wall and an old wall when the new wall is built according to the present invention;
FIG. 2 is a schematic view showing the construction of the present invention for embodying the burying position of the anchoring connection rods;
fig. 3 is an enlarged view of a portion a in fig. 2.
In the figure, 1, a new wall body; 2. an old wall body; 21. a groove is embedded; 3. an injector; 31. an injection outer cylinder; 311. a connector; 312. an ear plate; 32. an injection piston; 321. a limiting plate; 4. an injection tray; 41. an injection tube; 42. a connecting pipe; 5. a rubber band; 6. an anchor connecting rod; 61. and (6) glue outlet.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the new and old wall joint wall crack-resistant structure disclosed by the invention comprises an old wall 2 and a new wall 1 which are arranged side by side, wherein anchoring connecting rods 6 are uniformly inserted into one side of the old wall 2 facing the new wall 1 along the height direction. The anchoring connecting rod 6 is L-shaped and hollow, and one end of the anchoring connecting rod 6 far away from the old wall body 2 extends to the surface of the new wall body 1.
As shown in fig. 2 and 3, the side wall of the anchor connecting rod 6 is uniformly provided with a plurality of glue outlet holes 61, and the inside of the anchor connecting rod is filled with an adhesive, wherein the adhesive is any one of an epoxy resin adhesive, a polyvinyl acetal adhesive, a chloroprene rubber adhesive or a polysulfide rubber adhesive. The epoxy resin adhesive is preferably selected in the embodiment, has the characteristics of being compact, waterproof, good in leakage resistance, high in strength and the like, has good manufacturability such as strong adhesive force, normal-temperature operation and simple and convenient construction, and can firmly connect the anchoring connecting rod 6 with the new wall body 1 and the old wall body 2 after overflowing and solidifying from the glue outlet hole 61.
The wall surface at the joint of the new wall body 1 and the old wall body 2 is also fixedly provided with a reinforcing net, and the reinforcing net in the embodiment is preferably alkali-resistant glass fiber mesh cloth. The coating of alkali-resistant glass fiber net cloth outside has the base surface layer that forms by cement mortar air-dries the back, and the outer coating of base surface layer has the layer of whitewashing, and the layer of whitewashing includes putty layer and the latex paint layer that sets gradually from inside to outside, and the putty layer comprises dry powder type putty, and the latex paint layer comprises water-soluble interior wall emulsion paint, and putty layer and latex paint layer can add 1-2 layers according to actual construction.
The invention also provides a construction process based on the wall surface crack prevention structure of the joint part of the new wall body and the old wall body, which comprises the following steps:
s1, construction preparation: preparing bricks which are the same as the bricks of the old wall body 2 and cement mortar for building bricks for standby, and spraying water on the bricks to prevent the bricks from absorbing the water of the cement mortar too fast in the subsequent wall building; the lime layer on the side wall of the old wall body 2 facing the new wall body 1 is removed, and a plurality of embedded grooves 21 are chiseled along the height direction of the old wall body 2.
S2, building a new wall 1: laying wall-building construction lines, building bricks from bottom to top, laying the end parts of the bricks close to the old wall body 2 into the embedded grooves 21 dug by the old wall body 2 in the S1, and filling cement mortar between the bricks and the embedded grooves 21.
Preparing a plurality of anchoring connecting rods 6, drilling a plurality of holes on one side of the old wall body 2 facing the new wall body 1 by using a drilling machine, wherein the holes are uniformly arranged along the height of the old wall body 2, the hole depth is not less than 10cm, one end of each anchoring connecting rod 6 is horizontally inserted into each hole, and cement mortar is also filled in the hole. The holes are uniformly distributed from top to bottom, the spacing distance is 30-50cm, the specific spacing can be selected according to the thickness of bricks, the other end of the anchoring connecting rod 6 can be horizontally placed on the bricks and extend to the surface of the new wall body 1, the bricks and the bricks are combined and stacked through cement mortar, and one end, far away from the old wall body 2, of the anchoring connecting rod 6 is also combined between the adjacent upper and lower bricks through the cement mortar until the new wall body 1 is built at the construction height. After the new wall body 1 is built, the new wall body needs to be maintained for 15 days, so that the drying degree of cement mortar in the new wall body 1 is basically consistent with that of the old wall body 2.
S3, net hanging processing:
after the new wall body 1 is maintained, a lime layer on the wall surface at the joint part of the new wall body 1 and the old wall body 2 is shoveled, the surface sundries, residual mortar, floating ash, dust, dirt, oil stains and the like on the wall surface of the new wall body 1 and the wall surface at the joint part of the new wall body 1 and the old wall body 2 are cleaned in advance, and the cleaned wall body is sprayed with water for moistening.
The wall surface of the new wall body 1 and the wall surface at the joint of the new wall body and the old wall body 2 are sprayed with the interface agent through a roller or a machine, the wall surface is ensured to have no open water when the interface agent is sprayed, the interface agent in the embodiment can adopt a dry powder type interface agent, and is produced and manufactured by Qingdao Zongnengda building science and technology Limited company.
Preparing alkali-resistant glass fiber mesh cloth, fitting the alkali-resistant glass fiber mesh cloth at the center of the joint of the new wall body 1 and the old wall body 2, fixing the alkali-resistant glass fiber mesh cloth with the wall surface through a plurality of heat preservation nails, wherein the width of the alkali-resistant glass fiber mesh cloth on the new wall body 1 and the old wall body 2 is not lower than 15cm, and the width of the alkali-resistant glass fiber mesh cloth covering the new wall body 1 is required to be greater than the length of the anchoring connecting rod 6 in the new wall body 1. In this embodiment, the specific length of the anchor rod in the new wall 1 is 12 cm.
After the alkali-resistant fiberglass gridding cloth is fixed, cement mortar is trowelled on the outer side of the alkali-resistant fiberglass gridding cloth, a new wall body 1 is formed, because the dry powder type interface agent has super-strong two-way bonding force, excellent water resistance and aging resistance, and extremely strong two-way permeability, the wall surface can be fully infiltrated, and the wall surface can also be rough, so that the wall surface and the base surface layer are combined more stably and firmly, meanwhile, the alkali-resistant fiberglass gridding cloth can be used as a wall body reinforcing material to enhance the combination firmness of the base surface layer and the wall surface, and the possibility of later-stage wall surface cracking is reduced.
S4, pouring adhesive:
before applying cement mortar to the outer side of the alkali-resistant glass fiber mesh fabric in S3, preparing an injection plate 4, as shown in fig. 2 and 3, connecting an injection pipe 41 to one side of the injection plate 4, connecting a connecting pipe 42 to the other side of the injection plate 4, applying a cementing agent to the end surface of the injection plate 4 where the injection pipe 41 is provided in advance, partially inserting the injection pipe 41 into the end of the anchor connecting rod 6, applying cement mortar, pushing the injection pipe 41 into the end of the anchor connecting rod 6 after applying the cement mortar, and at this time, abutting and fixing the injection plate 4 with the cement mortar.
Preparing the injector 3, as shown in fig. 2 and 3, the injector 3 includes an injection outer cylinder 31 and an injection piston 32, the injection piston 32 is abutted and sleeved inside the injection outer cylinder 31, a limiting plate 321 is integrally formed at one end of the injection piston 32 far away from the end where the injection piston is sleeved into the injection outer cylinder 31, a connector 311 is arranged at one end of the injection outer cylinder 31 far away from the injection piston 32, and an ear plate 312 is welded to a side wall of the end. The injector 3 is used for extracting a certain amount of epoxy resin cementing agent, after the connector 311 is inserted into the connecting pipe 42, the rubber band 5 with a retraction trend is sleeved between the ear plate 312 and the limiting plate 321, the epoxy resin cementing agent in the injection sleeve can be automatically injected into the anchoring connecting rod 6 by utilizing the retraction force of the rubber band 5, at the moment, the epoxy resin cementing agent can overflow outwards from the glue outlet hole 61, especially the part of the anchoring connecting rod 6 positioned in the old wall body 2, because the wet cement mortar is not existed when the new wall body 1 is built at the position, and the larger pressure can not exist when the epoxy resin cementing agent overflows from the glue outlet hole 61 at the position, so the epoxy resin cementing agent positioned in the old wall body 2 can be combined with the old wall body 2, and the epoxy resin cementing agent positioned in the new wall body 1 can be combined with the cement mortar for building the wall. In this process, the glue injection work of the plurality of anchor connecting rods 6 can be performed simultaneously.
When the epoxy resin glue is completely cured and poured, the injection tray 4 is removed.
S5, after the cementing agent is poured, coating a whitewashing layer on the surface of the new wall body 1 treated by the S4, wherein the coating steps are as follows:
(1) cleaning the base surface layer, and airing for 24 hours after cleaning;
(2) painting a putty layer on the base surface layer cleaned in the step (1), wherein the painting thickness is 1mm, airing for 24 hours after painting is finished, and if the integral flatness difference of the base surface layer is large, painting a putty layer after painting the first putty layer for leveling, but waiting for the first putty layer before painting;
(3) and (3) painting a latex paint layer on the wall surface treated in the step (2), wherein the painting thickness is 1mm, and airing for 24 hours after painting is finished to finish final construction.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a new and old wall body joint wall crack control structure, includes new wall body (1), old wall body (2) and along anchor connecting rod (6) of new wall body (1) direction of height equipartition, its characterized in that: the inside cavity of anchor connecting rod (6), the one end of anchor connecting rod (6) is inserted to old wall body (2) orientation one side of new wall body (1), and the other end extends to the surface of new wall body (1), a plurality of glue outlet holes (61) have evenly been seted up along its extending direction to the lateral wall of anchor connecting rod (6), the embedment has the adhesive in anchor connecting rod (6).
2. The wall surface crack control structure of the new and old wall body joint part as claimed in claim 1, characterized in that: the adhesive is any one of epoxy resin adhesive, polyvinyl acetal adhesive, chloroprene rubber adhesive or polysulfide rubber adhesive.
3. The wall surface crack control structure of the new and old wall body joint part as claimed in claim 2, characterized in that: the novel wall body (1) and old wall body (2) junction's wall department is fixed to be provided with the reinforcing net, the wall department of new wall body (1) and old wall body (2) junction just is located the reinforcing net outside and coats and has the base course, the base course outside is coated and is scribbled whitewash layer, the reinforcing net is alkali-resisting glass fiber net cloth.
4. The wall surface crack control structure of the new and old wall body joint part as claimed in claim 3, characterized in that: the painting layer comprises a putty layer and a latex paint layer which are arranged from inside to outside in sequence.
5. A construction process for an anti-cracking structure of a wall surface at a joint of a new wall body and an old wall body is characterized in that: the wall surface crack-resistant structure for the new and old wall body joint part comprises the following construction steps:
s1, construction preparation: preparing bricks and cement mortar for bricking, and removing a lime layer of the side wall of the old wall body (2) facing the new wall body (1);
s2, building a new wall (1): laying wall-building construction lines, building bricks from bottom to top, horizontally embedding one end of an anchoring connecting rod (6) at one side of the old wall body (2) facing the new wall body (1), placing the other end of the anchoring connecting rod on bricks and extending to the surface of the new wall body (1), and then plastering cement mortar on the surfaces of the bricks to build an upper layer of bricks until the new wall body (1) is built to the construction height;
s3, net hanging processing: removing a lime layer on the wall surface at the joint of the new wall body (1) and the old wall body (2), preparing alkali-resistant glass fiber mesh cloth, attaching and fixing the alkali-resistant glass fiber mesh cloth to the joint of the new wall body (1) and the old wall body (2), and troweling cement mortar outside the alkali-resistant glass fiber mesh cloth to form a base surface layer of the new wall body (1), wherein the joint width of the alkali-resistant glass fiber mesh cloth and the new wall body (1) is required to be greater than the length of the anchoring connecting rod (6) in the new wall body (1);
s4, pouring adhesive: injecting epoxy resin glue into the anchoring connecting rod (6) by using the injector (3);
and S5, coating a whitewash layer on the surface of the new wall body (1) processed by the S4, and finishing the final construction.
6. The construction process of the new and old wall joint wall crack prevention structure as claimed in claim 5, wherein: syringe (3) are including injection urceolus (31) and injection piston (32), injection piston (32) swing joint is in injection urceolus (31), the one end that injection piston (32) were kept away from in injection urceolus (31) is equipped with connector (311) of inserting to connecting pipe (42) in, the lateral wall of injection urceolus (31) is equipped with otic placode (312), the one end that injection piston (32) were kept away from injection urceolus (31) is equipped with limiting plate (321), the cover is equipped with rubber band (5) that are the shrink trend between limiting plate (321) and otic placode (312).
7. The construction process of the new and old wall joint wall crack prevention structure as claimed in claim 6, wherein: set up injection dish (4) earlier before pouring into the adhesive in S4, injection dish (4) are fixed in new wall body (1) wall through cement mortar, injection dish (4) one side is connected with injection tube (41) with anchor connecting rod (6) tip intercommunication, and the opposite side is equipped with and supplies connector (311) male connecting pipe (42), injection dish (4) are waited epoxy glue and are poured the completion and carry out the shovel after the complete cure, carry out S5 again.
8. The construction process of the new and old wall joint wall crack prevention structure as claimed in claim 5, wherein: in the step S1, after the lime layer is removed from one side of the old wall body (2) facing the new wall body (1), a plurality of embedded grooves (21) are chiseled along the height direction of the old wall body (2), and one end of a brick close to the old wall body (2) in the step S2 is laid into the embedded groove (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010421393.9A CN111593902A (en) | 2020-05-18 | 2020-05-18 | Wall surface crack prevention structure for joint of new wall body and old wall body and construction process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010421393.9A CN111593902A (en) | 2020-05-18 | 2020-05-18 | Wall surface crack prevention structure for joint of new wall body and old wall body and construction process |
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| CN111593902A true CN111593902A (en) | 2020-08-28 |
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| CN202010421393.9A Pending CN111593902A (en) | 2020-05-18 | 2020-05-18 | Wall surface crack prevention structure for joint of new wall body and old wall body and construction process |
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Cited By (1)
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| CN112709438A (en) * | 2020-12-29 | 2021-04-27 | 上海云兰建筑装饰工程有限公司 | Splicing construction method for new and old walls |
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Application publication date: 20200828 |