阅读说明：本技术 一种模板拼接无水平施工缝的施工方法 (Construction method for splicing templates without horizontal construction joints ) 是由 宋祝 石新波 王威 马黎黎 陈坤 曹依博 胡浩 韩月明 闫学政 刘欣 丁思名 于 2021-08-26 设计创作，主要内容包括：一种模板拼接无水平施工缝的施工方法,涉及建筑施工领域。施工步骤包括：通过安装最下方的第一段模板；在第一段模板上边缘的内侧安装泡沫橡胶条,异形钢筋安装于第一段模板上端口处；第一次浇注混凝土；形成上端是凸形的第一次浇注混凝土墙或柱；安装上部的第二段模板；第二次浇注混凝土,异形钢筋周边的竖向直筋设置于填充混凝土中实现加固；混凝土干燥后,拆除第二段模板形成混凝土墙或柱。解决了现有技术中现浇混凝土墙中会存在水平施工缝的问题；本发明更进一步的解决了隐藏施工缝的土填混凝充容易掉,进而造成施工缝外露的问题。(A construction method for splicing templates without horizontal construction joints relates to the field of building construction. The construction steps comprise: installing the first section of the template at the lowest part; installing a foam rubber strip on the inner side of the upper edge of the first section of template, and installing a special-shaped steel bar at the upper port of the first section of template; pouring concrete for the first time; forming a first cast concrete wall or column with a convex upper end; installing a second section of template on the upper part; pouring concrete for the second time, and arranging vertical straight bars around the special-shaped steel bars in the filling concrete to realize reinforcement; and after the concrete is dried, removing the second section of template to form the concrete wall or column. The problem that a horizontal construction joint exists in a cast-in-place concrete wall in the prior art is solved; the invention further solves the problem that the concrete filling of the hidden construction joint is easy to fall off, thereby causing the exposure of the construction joint.)

1. A construction method for splicing templates without a horizontal construction joint is characterized by comprising the following steps:

the first step is as follows: constructing reinforcing steel bars inside the building wall or column;

secondly, installing a first section of template at the bottom, wherein the first section of template is connected through a first section of counter-pulling steel pipe;

thirdly, installing a foam rubber strip and a special-shaped steel bar, installing the foam rubber strip on the inner side of the upper edge of the first section of template, installing the special-shaped steel bar at the upper port of the first section of template, and inserting the vertical straight bars on the periphery of the special-shaped steel bar into the foam rubber strip;

fourthly, pouring concrete for the first time, pouring a concrete wall or column for the first time in the first section of template, and pouring the middle part of the deformed steel bar into the upper surface of the deformed steel bar;

fifthly, respectively removing the first section of template, the bolt and the foam rubber strip after the concrete is dried to form a first cast concrete wall or column with a convex upper end;

sixthly, installing a second section of upper template, wherein the lower end of the second section of template is arranged on the outer side of the upper part of the first-time poured concrete wall or column and is fixed with the first section of counter-pulling steel pipe through a bolt, and the upper part of the second section of template is fixed through the second section of counter-pulling steel pipe;

seventhly, pouring concrete for the second time, pouring a concrete wall or column for the second time in the second section of template, wherein the horizontal construction joint of the formed filling concrete is hidden by the periphery of the concrete wall or column for the second time, meanwhile, vertical straight bars at the periphery of the special-shaped steel bars are poured in the filling concrete, the special-shaped steel bars are positioned at the joint surface of the concrete wall or column for the first time and the concrete wall or column for the second time and are connected between the concrete wall or column for the first time and the concrete wall or column for the second time, and the vertical straight bars are arranged in the filling concrete to realize reinforcement;

and eighthly, after the concrete is dried, removing the bolts and the second section of template to form the concrete wall or column.

2. The method of claim 1, wherein the strip of foam rubber is backed with adhesive, and the sticker on the backing adhesive is torn off to attach the strip of foam rubber to the first section of form.

3. The construction method of the template splicing horizontal-free construction joint as claimed in claim 1, wherein the deformed steel bars are formed by combining longitudinal and transverse steel bars, and the longitudinal and transverse steel bars are welded at the crossing positions.

4. The construction method for splicing the formworks without the horizontal construction joints according to claim 3, wherein the diameter of the steel bars forming the deformed steel bars is 3-5 mm.

5. A construction method for splicing formworks without horizontal construction joints according to claim 2, 3 or 4, characterized in that a steel mesh is used to replace the deformed steel bars, and the periphery of the steel mesh is provided with vertical steel wires bent at a right angle downwards, and the vertical steel wires are inserted into the foam rubber strips when the first section of formwork is installed and are arranged in the filled concrete after the second pouring to realize reinforcement.

6. The method as claimed in claim 5, wherein the center of the deformed steel bar or steel net is an arc-shaped concave bottom surface, and the arc-shaped concave surface of the center of the deformed steel bar or steel net is poured into the first-poured concrete wall or column.

7. The construction method of the horizontal-free construction joint for the template splicing as claimed in claim 1, wherein the end of the first section of counter-pulling steel pipe is provided with a threaded hole, the first section of counter-pulling steel pipe is horizontally arranged in the first section of template, two ends of the first section of template are against the inner side of the first section of template, the outer side of the first section of template is provided with a bolt, and the bolt penetrates through the first section of template to be matched with the threaded hole of the first section of counter-pulling steel pipe.

8. The construction method of template splicing horizontal-free construction joints according to claim 1, wherein concrete is delivered upwards for the third time according to the height of the construction wall or column, and the process is the same as the second pouring.

9. The construction method for splicing the formworks without the horizontal construction joints according to claim 1, wherein the deformed bars or the steel nets are not installed in the third step; and in the fourth step, the deformed steel bar or the steel mesh is installed immediately after the concrete is poured for the first time, and during installation, the deformed steel bar or the steel mesh is manually pressed downwards to enable the middle part of the deformed steel bar or the steel mesh to be poured into the concrete, and the vertical straight bars or the vertical steel wires at the edge of the deformed steel bar or the steel mesh are inserted into the foam rubber strips.

Technical Field

The invention relates to the field of building construction, in particular to a construction method of a building column and a wall without a horizontal construction joint.

Background

The cast-in-place wall body is a cast-in-place wall body, is different from a prefabricated wall body, and is a structural component which needs to be bound with steel bars and poured with concrete on site, on the contrary, a component which is bound with the steel bars and poured with concrete in a prefabrication factory is called a prefabricated wall body component. In the building construction, the cast-in-place concrete wall is a common component, especially some public buildings such as libraries, museums, exhibition centers and the like, the concrete wall and the column are often designed to be thick and tall, the construction quality requirement is high, the cast-in-place concrete wall and the column are difficult to cast and form once in construction, and at the moment, a horizontal construction joint needs to be reserved for two or more times of casting. Therefore, a horizontal construction joint is formed between the first-poured concrete and the second-poured concrete, the construction joint is not a real existing 'joint', and only a joint surface exists between the first-poured concrete and the second-poured concrete after the initial setting time is exceeded, and the joint surface is called a construction joint. The concrete aggregate at the construction joint is concentrated, the concrete is loose, the stubbles of the new concrete and the old concrete are obvious, and water leaks along the joint.

If the horizontal construction joint is not properly treated, the phenomena of expansion, slurry flow, slab staggering and the like can occur when the upper wall body is constructed, and the construction quality of concrete and the normal operation of the subsequent process are influenced. In order to solve the problem, the technical personnel firstly think of the template splicing technology for realizing the non-horizontal construction joint, namely the template splicing non-horizontal construction joint structure of the cast-in-place concrete wall column, wherein the non-horizontal construction joint structure comprises a first cast concrete structure and a second cast concrete structure, the top of the first cast concrete structure is a convex structure, the lower edge of the second cast concrete structure is filled with concrete, and the concrete filling is coated on the periphery of the first cast concrete structure to hide the horizontal construction joint in the concrete. Although horizontal construction joints are effectively hidden in the technology in use, technicians find that a concrete filling structure formed by the second pouring edge has a local or large-area collapse problem after a period of time through research and experiments, and the reason is that a vertical or oblique construction joint is formed between the concrete filling structure formed by the second pouring edge and a first pouring structure, the filled concrete outside the construction joint is not firm, and the collapse can occur due to small impact or vibration in later construction.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The invention provides a construction method for splicing templates without a horizontal construction joint, which solves the problem that a horizontal construction joint exists in a cast-in-place concrete wall in the prior art; the invention further solves the problem that the concrete filling of the hidden construction joint is easy to fall off, thereby causing the exposure of the construction joint.

In order to solve the problems, the invention adopts the following technical scheme: a construction method for splicing templates without horizontal construction joints comprises the following steps:

the first step is as follows: constructing a steel bar 1 in a building wall or column;

secondly, installing a first section of the template 2 at the lowest part, and connecting the first section of the template 2 through a first section of counter-pulling steel pipe 3;

thirdly, installing a foam rubber strip 5 and a special-shaped steel bar 6, installing the foam rubber strip 5 on the inner side of the upper edge of the first section of template 2, installing the special-shaped steel bar at the upper port of the first section of template, and inserting the vertical straight bar 6-1 at the periphery of the special-shaped steel bar into the foam rubber strip 5;

and fourthly, pouring concrete for the first time, pouring a concrete wall or column E for the first time in the first section of template 2, and pouring the middle part of the deformed steel bar into the upper surface of the deformed steel bar.

Fifthly, after the concrete is dried, respectively removing the first section of template 2, the bolt 4 and the foam rubber strip 5 to form a first cast concrete wall or column E with a convex upper end;

sixthly, installing a second section of template 7 at the upper part, wherein the lower end of the second section of template 7 is arranged at the outer side of the upper part of the first-time poured concrete wall or column E and is fixed with the first section of counter-pulling steel pipe 3 through a bolt 4, and the upper part of the second section of template 7 is fixed through a second section of counter-pulling steel pipe 8;

seventhly, pouring concrete for the second time, pouring a concrete wall or column F for the second time in the second section of template 7, hiding a horizontal construction joint by formed filling concrete at the lower periphery of the concrete wall or column F for the second time, simultaneously pouring vertical straight reinforcements 6-1 at the periphery of the special-shaped reinforcement 6 into the filling concrete, wherein the special-shaped reinforcement 6 is positioned at the joint surface of the concrete wall or column E for the first time and the concrete wall or column F for the second time and is connected between the concrete wall or column E for the first time and the concrete wall or column F for the second time, and the vertical straight reinforcements 6-1 are arranged in the filling concrete to realize reinforcement;

and eighthly, removing the bolts 4 and the second section of template 7 to form the concrete wall or column after the concrete is dried.

Further, the construction method for splicing the template without the horizontal construction joint further has the following characteristics: the foam rubber strip 5 is provided with back glue, the sticker on the back glue is torn, and the foam rubber strip 5 is stuck on the first section of template 2.

Further, the construction method for splicing the template without the horizontal construction joint further has the following characteristics: the special-shaped steel bars 6 are formed by combining longitudinal and transverse steel bars, and the longitudinal and transverse steel bars are welded at the crossed positions.

Further, the construction method for splicing the template without the horizontal construction joint further has the following characteristics: the diameter of the steel bar forming the deformed steel bar is 3-5 mm.

Further, the construction method for splicing the template without the horizontal construction joint further has the following characteristics: replace the deformed steel bar 6 with steel mesh 9, there is the vertical steel wire of downward right angle bending in steel mesh 9 periphery, and this vertical steel wire is inserted in foam rubber strip 5 when the first section template 2 of installation to set up after the secondary pouring and realize consolidating in the concrete of packing.

Further, the construction method for splicing the template without the horizontal construction joint further has the following characteristics: the center of the deformed steel bar 6 or the steel mesh 9 is an arc-shaped lower concave surface, and the arc-shaped concave surface at the center of the deformed steel bar 6 or the steel mesh 9 is poured into the first-time poured concrete wall or column E.

Further, the construction method for splicing the template without the horizontal construction joint further has the following characteristics: 3 tip threaded holes of first section counter-pull steel pipe, first section counter-pull steel pipe 3 level set up in first section template 2 and both ends top 2 inboards at first section template, and the 2 outsides of first section template set up bolt 4, and bolt 4 passes first section template 2 and first section counter-pull steel pipe 3 threaded holes cooperation.

Further, the construction method for splicing the template without the horizontal construction joint further has the following characteristics: and (4) carrying out upward third-time concrete pouring according to the height of the construction wall or column, wherein the technological process is the same as that of the second-time pouring.

Further, the construction method for splicing the template without the horizontal construction joint further has the following characteristics: in the third step, the special-shaped ribs 6 or the steel mesh 9 are not installed; and in the fourth step, the deformed steel bar 6 or the steel mesh 9 is installed immediately after the concrete is poured for the first time, during installation, the deformed steel bar 6 or the steel mesh 9 is manually pressed downwards to enable the middle part of the deformed steel bar 6 or the steel mesh 9 to be poured into the concrete, and the vertical straight bar 6-1 or the vertical steel wire 9-1 at the edge of the deformed steel bar 6 or the steel mesh 9 is inserted into the foam rubber strip 5.

According to the construction method for splicing the template without the horizontal construction joint, the concrete wall or column poured for the first time forms a convex top surface, and the horizontal construction joint is wrapped through concrete filling, so that the construction of the concrete wall or column without the horizontal construction joint is realized. The special-shaped steel bars are arranged at the horizontal construction joint position, the filling concrete and the wall columns which are poured twice are connected and reinforced, the strength of the filling concrete is enhanced, the filled concrete is prevented from falling off, and the engaging force is increased.

Drawings

FIG. 1 is a schematic representation of a first step in the construction of the present invention;

FIG. 2 is a schematic representation of a second step in the construction of the present invention;

FIG. 3 is a schematic representation of a third step in the construction of the present invention;

FIG. 4 is a schematic representation of a fourth step in the construction of the present invention;

FIG. 5 is a schematic illustration of a fifth step in the construction of the present invention;

FIG. 6 is a schematic representation of a sixth step in the construction of the present invention;

FIG. 7 is a schematic representation of a seventh step in the construction of the present invention;

FIG. 8 is a schematic view of an eighth step of the construction of the present invention;

FIG. 9 is a schematic view of the construction of the deformed steel bar of the present invention;

fig. 10 is a schematic view of the steel mesh structure of the present invention.

The symbols in the figure are as follows: the concrete wall or column is cast for the first time by using the steel bar 1, the first section template 2, the first section counter-pulling steel pipe 3, the bolt 4, the foam rubber strip 5, the special-shaped steel bar 6, the vertical straight bar 6-1, the second section template 7, the second section counter-pulling steel pipe 8, the steel mesh 9, the vertical steel wire 9-1, the sponge rubber strip 10, the concrete wall or column E is cast for the first time, and the concrete wall or column F is cast for the second time.

Detailed Description

The present invention will be described in detail with reference to the following preferred embodiments.

A construction method for splicing templates without horizontal construction joints comprises the following steps:

the first step is as follows: as shown in fig. 1, the construction of the reinforcing bars 1 inside the building wall or column is performed in the same manner as in the conventional art.

And secondly, installing a first section of template 2 at the bottom, connecting the first section of template 2 through a first section of counter-pulling steel pipe 3, wherein the end part of the first section of counter-pulling steel pipe 3 is provided with a threaded hole, the first section of counter-pulling steel pipe 3 is horizontally arranged in the first section of template 2, two ends of the first section of template are propped against the inner side of the first section of template 2, a bolt 4 is arranged on the outer side of the first section of template 2, and the bolt 4 penetrates through the first section of template 2 to be matched with the threaded hole of the first section of counter-pulling steel pipe 3. The steel tube drawing device is characterized in that the steel tube drawing device comprises a plurality of first section counter-drawing steel tubes 3, the first section counter-drawing steel tubes 3 are located on the same horizontal plane, and the first section counter-drawing steel tubes 3 are parallel or vertical to each other. Rubber pads are arranged at two ends of the opposite-pulling steel pipe, and a plurality of carpentry lines are arranged in the template. The split steel pipe is used for fixing two opposite templates, the number of the split steel pipe can be multiple, the split steel pipe is preferably arranged at a position 150mm away from a construction joint to be reserved, and a plurality of split bolts can be arranged perpendicular to each other.

Thirdly, as shown in fig. 3, 9 and 10, installing a foam rubber strip 5 and a deformed steel bar 6, installing the foam rubber strip 5 on the inner side of the upper edge of the first section of template 2, installing a back glue on the foam rubber strip 5, tearing off a sticker on the back glue, and sticking the foam rubber strip 5 on the first section of template 2; the section of the foam rubber strip 5 is rectangular, or the lower surface of the inner side of the foam rubber strip 5 is of an arc structure; the special-shaped steel bar 6 is formed by combining longitudinal and transverse steel bars, and the steel bars are only used for reinforcing horizontal joints and peripheral concrete filling structures, so that the steel bars do not need to be too thick, and the diameter of the steel bars is 3-5 mm. The crossed positions of longitudinal and transverse steel bars of the special-shaped steel bar 6 are welded, vertical straight bars 6-1 bent downwards at right angles are arranged on the periphery of the special-shaped steel bar 6, the special-shaped steel bar is arranged at the upper port of the first section of template, and the vertical straight bars 6-1 are inserted into the foam rubber strips 5; in practical application, the steel mesh 9 can be used for replacing the deformed steel bar 6, the periphery of the steel mesh 9 is provided with vertical steel wires bent downwards in a right angle, and the vertical steel wires are inserted into the foam rubber strips 5; the center of the deformed steel bar 6 or the steel net 9 is an arc-shaped concave surface.

Fourthly, as shown in fig. 4, concrete is poured for the first time, a concrete wall or column E is poured for the first time in the first section of the formwork 2, and the arc-shaped concave surface at the center of the deformed steel bar 6 or the steel net 9 is poured therein.

And fifthly, as shown in figure 5, after the concrete is dried, respectively removing the first section of template 2, the bolts 4 and the foam rubber strips 5 to form a first cast concrete wall or column E with a convex upper end. The convex top surface of the first poured concrete wall or column E is roughened, that is, a dent is chiseled on the concrete structural surface and loose stones are cleaned, then the surface is washed clean by pressure water, and then plain cement slurry is brushed, wherein the plain cement slurry is also called pure cement slurry and is cement slurry without any other materials except cement and water, and the mass ratio of water to cement is usually 0.42: 1.

and sixthly, as shown in fig. 6, installing a second section of template 7 at the upper part, wherein the lower end of the second section of template 7 is arranged at the outer side of the upper part of the first-time poured concrete wall or column E and is fixed with the first section of counter-pulling steel pipe 3 through a bolt 4, the upper part of the second section of template 7 is fixed through a second section of counter-pulling steel pipe 8, and the connection structure of the second section of template 7 and the second section of counter-pulling steel pipe is the same as that of the first section of counter-pulling steel pipe 3 and the first section of template 2 in the second step. The distance between the second section of counter-pulling steel pipe 8 and the first section of counter-pulling steel pipe 3 and the construction joint to be reserved is 140-160 mm. The sponge adhesive tape 10 is adhered to the surface of the first-time poured concrete wall or column E, so that the phenomenon of slurry leakage at the corner of the template can be avoided, and the appearance quality of the bare concrete is improved.

Seventhly, as shown in fig. 7, concrete is poured for the second time, a concrete wall or column F is poured for the second time in the second section of formwork 7, the lower periphery of the concrete wall or column F to be poured for the second time hides the formed filling concrete to form a horizontal construction joint, meanwhile, the vertical straight reinforcement 6-1 or the vertical steel wire 9-1 at the periphery of the deformed steel bar 6 or the steel mesh 9 is poured into the filling concrete, the deformed steel bar 6 or the steel mesh 9 is positioned at the junction surface of the concrete wall or column E poured for the first time and the concrete wall or column F poured for the second time and is connected between the concrete wall or column E poured for the first time and the concrete wall or column F poured for the second time, and the vertical straight reinforcement 6-1 or the vertical steel wire 9-1 is arranged in the filling concrete to realize reinforcement.

And eighthly, as shown in fig. 8, after the concrete is dried, removing the bolts 4 and the second section of the template 7 to form a concrete wall or column, and carrying out upward third-time concrete pouring according to the height of the wall or column, wherein the technological process is the same as that of the second-time concrete pouring.

The inventive concept is explained in detail herein using specific examples, which are given only to aid in understanding the core concepts of the invention. It should be understood that any obvious modifications, equivalents and other improvements made by those skilled in the art without departing from the spirit of the present invention are included in the scope of the present invention.