A construction method for the reinforcement treatment of the joint between a new wall and an old wall

Abstract

The present invention provides a construction method for the reinforcement treatment of the junction between a new wall and an old wall, comprising the following steps: (a) cutting a plurality of grooves in the levelled old wall; (b) implanting at least one row of steel bars into the old wall; (c) embedding a part of the structure of the new wall into the corresponding grooves so that the surfaces of the old wall and the new wall are in the same plane; (d) removing part of the old mortar plaster layer on the surface of the old wall, and the removed part of the old mortar plaster layer is the part close to the new wall; (e) the outer surface of the new mortar plaster layer inclines towards the old wall so that the thickness of the new mortar plaster layer at the junction of the new and old mortar plaster layers is less than the thickness of the old mortar plaster layer at the junction of the new and old mortar plaster layers; (f) forming a flat Lafarge base layer on the old mortar plaster layer and the new mortar plaster layer, so that the thickness of the Lafarge base layer at the joint of the mortar plaster layers increases.

Description

Technical Field

[0001] The present invention belongs to the field of engineering technology, and relates to a construction method, specifically to a construction method for reinforcement treatment at the junction of new and old walls. Background Art

[0002] Old and dilapidated walls are becoming increasingly dull and aging under the test of time, affecting the indoor beauty. It is urgent to repaint and decorate the old walls to make them regain their former glory. Some people may think that wall renovation is very simple and a good decorative effect can be obtained just by repainting. In fact, it is not the case. If you really want to renovate the wall, you should re-treat the base layer of the wall, so that no matter painting wall paint or laying wall bricks and pasting wallpapers, a better decorative effect can be achieved. Otherwise, the connection between the new and old walls is not firm and prone to cracking.

[0003] As Figure 1 shown in a connection structure between new and old walls, which includes an old wall 1', a new wall 4' built on one side of the old wall 1' and adjacent to it, an old mortar plaster layer 2' formed on the surface of the old wall 1', a new mortar plaster layer 5' formed on the surface of the new wall 4', and a Lafarge base layer 3' formed on the surfaces of the old mortar plaster layer 2' and the new mortar plaster layer 5'. As Figure 2 shown in another connection structure between new and old walls, which includes an old wall 1'', a new wall 4'' built on one side of the old wall 1'' and adjacent to it, an old mortar plaster layer 2'' formed on the surface of the old wall 1'', a new mortar plaster layer 5'' formed on the surface of the new wall 4'' and extending to the surface of the old wall 1'' to connect with the old mortar plaster layer 2'', a Lafarge base layer 3'' formed on the surfaces of the old mortar plaster layer 2'' and the new mortar plaster layer 5'', and a wire mesh 6'' arranged in the new mortar plaster layer 5'' and corresponding to the joint between the new wall 4'' and the old wall 1''. The above two connection structures between new and old walls are prone to cracking at the joint of the new and old walls. Therefore, it is necessary to develop a new construction method for reinforcement treatment at the junction of new and old walls. Summary of the Invention

[0004] The purpose of the present invention is to provide a construction method for reinforcement treatment at the junction of new and old walls to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A construction method for reinforcement treatment at the junction of new and old walls, including the following steps:

[0006] (a) Cut a plurality of grooves on the leveled old wall;

[0007] (b) Implant at least one row of steel bars into the old wall, so that the steel bars protrude from the surface of the old wall;

[0008] (c) Build a new wall on one side of the old wall, such that part of the structure of the new wall is correspondingly embedded in the groove, the surfaces of the old wall and the new wall are in the same plane, and the steel bars protruding from the old wall are embedded in the new wall;

[0009] (d) Partially remove the old mortar plaster layer on the surface of the old wall, and the removed part of the old mortar plaster layer is the part close to the new wall;

[0010] (e) Apply a new mortar plaster layer on the surface of the new wall, such that the new mortar plaster layer extends to the surface of the old wall and joins with the old mortar plaster layer; the outer surface of the new mortar plaster layer inclines towards the old wall such that the thickness of the new mortar plaster layer at the joint of the new and old mortar plaster layers is less than the thickness of the old mortar plaster layer at the joint of the new and old mortar plaster layers;

[0011] (f) Form a flat Lafarge base layer on the old mortar plaster layer and the new mortar plaster layer.

[0012] Optimally, in step (a), multiple grooves are horizontally and spacedly arranged, and the lowermost groove is in contact with the ground.

[0013] Further, in step (a), the height of the groove is 250 - 350 mm and the depth is 50 - 70 mm.

[0014] Further, in step (a), the projection of the steel bar on the old wall is outside the groove.

[0015] Even further, in step (b), the length of the steel bar is 0.8 - 1.2 m, and the height of the post - installed rebar is 400 - 600 mm from the ground or the spacing from another row of steel bars is 400 - 600 mm.

[0016] Optimally, in step (d), a wire mesh extending to the surface of the old wall is also hung on the surface of the new wall.

[0017] Further, in step (f), before the Lafarge base layer is made flat, a fiberglass mesh is also buried in the Lafarge base layer at the joint of the new mortar plaster layer and the old mortar plaster layer.

[0018] Optimally, the total thickness of the Lafarge base layer and the old mortar plaster layer is 25 - 35 mm, and the thickness of the new mortar plaster layer at the joint of the new and old mortar plaster layers is 8 - 12 mm.

[0019] Further, the included angle formed between the outer surface of the new mortar plaster layer and the surface of the new wall is 30 - 45°.

[0020] Further, the projected width of the wire mesh on the old wall and the new wall is ≥150 mm, and the projected width of the fiberglass mesh on the old mortar plaster layer and the new mortar plaster layer is ≥150 mm.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: In the construction method for reinforcing the connection between the old and new walls of the present invention, by applying a new mortar plaster layer on the surface of the new wall, the new mortar plaster layer extends to the surface of the old wall and is connected to the old mortar plaster layer, and the outer surface of the new mortar plaster layer is inclined towards the old wall. At this time, the thickness of the new mortar plaster layer at the connection between the old and new mortar plaster layers is less than the thickness of the old mortar plaster layer at the connection between the old and new mortar plaster layers. In this way, the two joints generated during the construction process (the wall joint and the mortar plaster layer joint) are both covered, increasing the thickness of the Lafarge base layer at the mortar plaster layer joint, enhancing the firmness of the Lafarge base layer and the mortar plaster layer and reducing the risk of cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of an existing connection structure between an old wall and a new wall;

[0023] Figure 2 is a schematic structural diagram of another existing connection structure between an old wall and a new wall;

[0024] Figure 3 is a schematic structural diagram of the connection structure between the old and new walls of the present invention;

[0025] Figure 4 is a schematic diagram of the plastering of the connection structure between the old and new walls of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] The preferred embodiments of the present invention will be described in detail below.

[0027] The serial numbers assigned to the components in this article, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in this application, unless otherwise specified, both include direct and indirect connections (couplings).

[0028] As Figure 3 and Figure 4 shown, the construction method for reinforcing the connection between the old and new walls includes the following steps:

[0029] (a)On the leveled old wall 1 (usually at the end face of the old wall 1), a plurality of grooves are chiseled (the plurality of grooves are horizontal and arranged at intervals up and down); specifically, the lowermost groove is in contact with the ground, the height of the groove is 250 - 350 mm, the depth is 50 - 70 mm, and the height of the protruding part of the old wall 1 between two grooves can also be 250 - 350 mm. In this embodiment, the height of the groove is 300 mm and the depth is 60 mm.

[0030] (b)At least one row of steel bars 11 is implanted into the old wall (the number of steel bars in one row can be determined according to the actual thickness of the old wall 1, and the number of rows of the steel bars 11 can be determined according to the number of grooves); the steel bars 11 protrude from the surface of the old wall 1 and the projection of the steel bars 11 on the old wall is outside the groove (that is, the steel bars 11 are buried in the protruding part of the old wall 1); the length of the steel bars 11 is 0.8 - 1.2 m, the height of the implanted steel bars is 400 - 600 mm from the ground or / and the distance between another row of steel bars is 400 - 600 mm. In this embodiment, the length of the steel bars 11 is 1 m, the height of the implanted steel bars is 500 mm from the ground or / and the distance between another row of steel bars is 500 mm.

[0031] (c)A new wall 2 is built on one side of the old wall 1, so that a part of the structure of the new wall 2 is correspondingly embedded in the groove and the surfaces of the old wall 1 and the new wall 2 are in the same plane (in this embodiment, the thicknesses of the old wall 1 and the new wall 2 are equal and the two surfaces are flush), so that the steel bars 11 protruding from the old wall 1 are buried in the new wall 2.

[0032] (d)Part of the old mortar plaster layer 3 on the surface of the old wall 1 is removed (the removed part of the old mortar plaster layer 3 is the part close to the new wall 2); a wire mesh 6 extending to the surface of the old wall 1 is hung on the surface of the new wall 2; the projection widths of the wire mesh 6 on the old wall 1 and the new wall 2 are both ≥ 150 mm (that is, the width of the wire mesh 6 is at least 300 mm, and it is evenly projected and distributed on the old wall 1 and the new wall 2).

[0033] (e)Apply a new mortar plaster layer 4 on the surface of the new wall 2, such that the new mortar plaster layer 4 extends to the surface of the old wall 1 and joins the old mortar plaster layer 3 (a joint is formed between the new mortar plaster layer 4 and the old mortar plaster layer 3, and a joint is formed between the old wall 1 and the new wall 2, and both these joints are vertically arranged); the outer surface of the new mortar plaster layer 4 is inclined towards the old wall 1 such that the thickness of the new mortar plaster layer 4 at the joint between the new and old mortar plaster layers is less than the thickness of the old mortar plaster layer 3 at the joint between the new and old mortar plaster layers (i.e., the outer surface of the new mortar plaster layer 4 is inclined inwards); the included angle formed between the outer surface of the new mortar plaster layer 4 and the surface of the new wall 2 is preferably 30° - 45°, and at this time, the thickness of the new mortar plaster layer 4 at the joint between the new and old mortar plaster layers is 8 - 12 mm (in this embodiment, the thickness of the new mortar plaster layer 4 at the joint between the new and old mortar plaster layers is 10 mm). By applying a new mortar plaster layer 4 on the surface of the new wall 2, such that the new mortar plaster layer 4 extends to the surface of the old wall 1 and joins the old mortar plaster layer 3 and the outer surface of the new mortar plaster layer 4 is inclined towards the old wall 1, at this time, the thickness of the new mortar plaster layer 4 at the joint between the new and old mortar plaster layers is less than the thickness of the old mortar plaster layer at the joint between the new and old mortar plaster layers, so that the two joints (the wall joint and the mortar plaster layer joint) generated during construction are both covered, increasing the thickness of the Lafarge base layer at the mortar plaster layer joint, increasing the firmness of the Lafarge base layer and the mortar plaster layer and reducing the risk of cracking.

[0034] (f)Form a flat Lafarge base layer 5 on the old mortar plaster layer 3 and the new mortar plaster layer 4; before the Lafarge base layer 5 is made flat, also embed a fiberglass mesh 7 into the Lafarge base layer 5 at the joint between the new mortar plaster layer 4 and the old mortar plaster layer 3 (i.e., also embed the fiberglass mesh 7 into the Lafarge base layer 5 such that it corresponds to the joint between the new mortar plaster layer 4 and the old mortar plaster layer 3); the total thickness of the Lafarge base layer 5 and the old mortar plaster layer 3 is 25 - 35 mm (in this embodiment, the total thickness of the Lafarge base layer 5 and the old mortar plaster layer 3 is 30 mm, and the thickness of the old mortar plaster layer 3 is about 20 - 25 mm); the projected width of the fiberglass mesh 7 on both the old mortar plaster layer 3 and the new mortar plaster layer 4 is ≥ 150 mm (i.e., the width of the fiberglass mesh 7 is at least 300 mm, and it is evenly projected and distributed on the old mortar plaster layer 3 and the new mortar plaster layer 4).

[0035] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention. The purpose is to enable those familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A construction method for reinforcing the joint between a new wall and an old wall, characterized in that, It includes the following steps: (a) Cut a plurality of grooves in the leveled old wall (1); the plurality of grooves are horizontally arranged at intervals, and the lowermost groove is in contact with the ground; the height of the groove is 250 - 350 mm, and the depth is 50 - 70 mm; (b) Implant at least one row of steel bars (11) into the old wall so that the steel bars (11) protrude from the surface of the old wall (1); (c) Build a new wall (2) on one side of the old wall (1) so that a part of the structure of the new wall (2) is correspondingly embedded in the groove, the surfaces of the old wall (1) and the new wall (2) are in the same plane, and the steel bars (11) protruding from the old wall (1) are buried in the new wall (2); (d) Partially remove the old mortar plaster layer (3) on the surface of the old wall (1), and the removed part of the old mortar plaster layer (3) is the part close to the new wall (2); (e) Apply a new mortar plaster layer (4) on the surface of the new wall (2) so that the new mortar plaster layer (4) extends to the surface of the old wall (1) and is connected to the old mortar plaster layer (3); the outer surface of the new mortar plaster layer (4) is inclined towards the old wall (1) so that the thickness of the new mortar plaster layer (4) at the joint of the new and old mortar plaster layers is less than the thickness of the old mortar plaster layer (3) at the joint of the new and old mortar plaster layers; the included angle formed between the outer surface of the new mortar plaster layer (4) and the surface of the new wall (2) is 30 - 45°; (f) Form a flat Lafarge base layer (5) on the old mortar plaster layer (3) and the new mortar plaster layer (4).

2. The construction method for reinforcement treatment at the junction of new and old walls according to claim 1, characterized in that: In step (a), the projection of the steel bars (11) on the old wall is outside the groove.

3. The construction method for the reinforcement treatment of the intersection between the new and old walls according to claim 2, characterized in that: In step (b), the length of the steel bars (11) is 0.8 - 1.2 m, and the height of the implanted steel bars is 400 - 600 mm from the ground or the spacing from another row of steel bars is 400 - 600 mm.

4. The construction method for the reinforcement treatment of the joint between the new and old walls according to claim 1, characterized in that: In step (d), a wire mesh (6) extending to the surface of the old wall (1) is also hung on the surface of the new wall (2).

5. The construction method for the reinforcement treatment of the junction between the new and old walls according to claim 4, characterized in that: In step (f), before the Lafarge base layer (5) is leveled, a fiberglass mesh (7) is also buried in the Lafarge base layer (5) at the joint of the new mortar plaster layer (4) and the old mortar plaster layer (3).

6. The construction method for the reinforcement treatment of the intersection between the new and old walls according to claim 1, characterized in that: The total thickness of the Lafarge base layer (5) and the old mortar plaster layer (3) is 25 - 35 mm, and the thickness of the new mortar plaster layer (4) at the joint of the new and old mortar plaster layers is 8 - 12 mm.

7. The construction method for reinforcing the joint between the new and old walls according to claim 5, characterized in that: The projected width of the wire mesh (6) on the old wall (1) and the new wall (2) is ≥ 150 mm, and the projected width of the fiberglass mesh (7) on the old mortar plaster layer (3) and the new mortar plaster layer (4) is ≥ 150 mm.

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