Column foot template bottom leakage-proof structure and construction method thereof

Abstract

The present application relates to a kind of column foot formwork bottom leak-proof structure and its construction method, column foot formwork bottom leak-proof structure, including four column foot formwork, column foot formwork outside is locked by positioning hoop, so that column foot formwork is enclosed into column foot pouring cavity, column foot formwork bottom is equipped with protection frame, protection frame is combined by four fixed plates;Protection frame lower end is embedded in column bottom floor concrete, and the upper end of each fixed plate of protection frame is respectively attached to the outer surface of each column foot formwork;The construction method of the above-mentioned foot formwork bottom leak-proof structure is embedded in floor after leak-proof structure is made;Four column foot formwork lower end is respectively inserted into the interval between protection frame and clamping plate, four sides are closed, and pouring is carried out;After column foot concrete reaches specified strength, formwork is removed;Protection frame and clamping plate projecting on the surface of floor are cut off, and the present application protection frame completely blocks the passage or gap of column foot concrete lateral outward leakage;The present application forms U-shaped stoping structure at formwork bottom;The connection of leak-proof structure and formwork is convenient.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of concrete structure construction, and particularly relates to a column foot formwork bottom leakage prevention structure and a construction method thereof. BACKGROUND

[0002] Concrete pouring is an important process in the construction process of a concrete structure, and the setting accuracy of the formwork before concrete pouring affects the pouring quality of the concrete. Quality problems such as form expansion, leakage, and misalignment occur frequently, and the concrete pouring quality of columns, which are the main load-bearing components of the entire structure, needs to be strictly controlled. In the concrete pouring process of the columns, the leakage of the column foot is particularly prominent. Therefore, preventing the leakage of the column foot of the concrete column is of great significance to improving the pouring quality of the concrete column.

[0003] The traditional method for preventing leakage of the column foot of the concrete column is to use column foot mortar to block the leakage. However, this method increases the labor input and the transportation of the mortar during the erection of the formwork frame is very cumbersome. The second method is to use L-shaped steel to reinforce the bottom of the column foot during the erection of the formwork, which plays a blocking effect. The L-shaped angle steel is welded into a frame that matches the structure of the column foot formwork, and then the angle steel frame is fixed at the predetermined position of the floor (or bottom plate). The biggest disadvantage of this method is that the angle steel has a large rigidity, and the surface of the floor is not flat, so the fit between the bottom surface of the angle steel and the floor is poor, and gaps may occur, resulting in leakage. Therefore, it is urgent to invent a new type of concrete column foot leakage prevention construction tool and construction method. SUMMARY

[0004] The technical problem to be solved by the present application is the leakage of the column foot formwork bottom due to the poor flatness of the column bottom floor and the gaps between the column foot formwork bottom and the floor.

[0005] The present application solves the problem by adopting the following technical solution:

[0006] A column foot formwork bottom leakage prevention structure, comprising a four-sided column foot formwork, the column foot formwork is locked by a positioning hoop on the outside, so that the column foot formwork is enclosed into a column foot pouring cavity, and a protection frame is arranged at the bottom of the column foot formwork, the protection frame is composed of four fixed plates; the lower end of the protection frame is embedded in the concrete of the column bottom floor, and the upper end of each fixed plate of the protection frame is attached to the outer surface of each column foot formwork.

[0007] The present application has the following beneficial effects compared with the prior art:

[0008] The present application increases a protection frame at the bottom of the column foot formwork, the lower end of the protection frame is embedded in the concrete of the floor, and the protection frame is sleeved on the outside of the column foot formwork, thereby blocking the channel or gap for lateral outward leakage of the column foot concrete, and avoiding leakage of the column foot formwork bottom.

[0009] As preferred, the further technical solutions of the above structure are:

[0010] The bottom plate is further provided with a bottom plate, and the bottom plate is vertically fixed with the fixed plate.

[0011] The beneficial effects obtained by the above features are: the bottom plate plays an anchoring role, preventing the fixed plate from being pulled out of the concrete, and facilitating the positioning of the protection frame.

[0012] The inner side of each fixed plate is further provided with a pressing plate, and a gap is provided between the pressing plate and the fixed plate, and the column foot formwork is arranged in the gap; the pressing plate is made of a material with elastic bending and elastic resetting capability, and the lower end is embedded in the column bottom floor concrete, and the upper end is pressed against the inner surface of the column foot formwork through its own elasticity.

[0013] The beneficial effects obtained by the above features are: the pressing plate exerts outward pressure on the formwork from the inner side of the column foot formwork, and cooperates with the positioning hoop on the outer side of the formwork to constrain the column foot formwork from four sides, making the fixing of the formwork bottom more stable, and especially avoiding the displacement of the formwork inward before concrete pouring, resulting in a loose formwork joint.

[0014] The bottom plate and the pressing plate on each side of the column foot formwork are of an integral structure, which is folded from a metal sheet, the bottom plate is horizontally arranged, and the pressing plate is obliquely arranged, and the upper end of the pressing plate is offset to the side of the fixed plate.

[0015] The beneficial effects obtained by the above features are: this example is convenient to manufacture, the sheet structure does not produce obvious concrete missing steps at the lower end of the column foot, and the oblique arrangement of the pressing plate makes the upper end closely fit the column foot formwork, which is not easy to leak grout.

[0016] The part of the pressing plate located in the column bottom floor concrete is provided with a grout passing hole.

[0017] The beneficial effects obtained by the above features are: this embodiment is convenient for pre-burial of the structure, and when pouring concrete around the pre-buried structure, the grout can automatically fill into the gap.

[0018] The height of the pressing plate is greater than the height of the fixed plate, and the height difference between the pressing plate and the fixed plate is at least the thickness of the column foot formwork.

[0019] The beneficial effects obtained by the above features are: this example aims to facilitate the connection of the column foot formwork and the pre-buried part.

[0020] The bottom plates and the pressing plates of adjacent sides are connected by angle welding.

[0021] The beneficial effects obtained by the above features are: this example has good overall integrity, and is convenient to install.

[0022] The width of the column bottom floor concrete in the gap between the pressing plate and the fixed plate is matched with the column foot formwork, and the pressing plate is vertical after the lower end of the column foot formwork is inserted.

[0023] The beneficial effect obtained from the above features is that the limitation strengthens the anti-leakage protection of the included angle position, specifically, after the template is inserted, the upright pressing plate reduces the large gap between adjacent pressing plates, and then closes, so that the slurry is not easy to leak outward at this point.

[0024] The superimposed height of the pressing plate and the column foot template is 10mm-20mm.

[0025] The beneficial effect obtained from the above features is that the outward pressure applied to the bottom of the template in this example is large, and the stability of the lower end of the template cooperating with the fixed plate is good; the length of the slurry leakage path is increased.

[0026] The present application also provides a construction method based on the above-mentioned bottom leakage prevention structure of the column foot template, which is carried out according to the following steps:

[0027] Firstly, a metal sheet with a width equal to the width of each column foot template is folded into an L-shaped angle plate, and the included angle of the L-shaped angle plate is less than 90 degrees;

[0028] Secondly, each L-shaped angle plate is uniformly placed, one of the angle edges is placed flat as a bottom plate, and the other inclined angle edge is placed upward as a clamping plate;

[0029] Thirdly, the four L-shaped angle plates are sequentially welded at the corners;

[0030] Fourthly, four rigid fixed plates are taken to form a protection frame, the protection frame is sleeved outside the integral piece formed by the four L-shaped angle plates, the geometric centers are overlapped, a reserved space is left between the inner side of the protection frame and the clamping plate, and then the protection frame and the bottom plate are fixed by screwing from the bottom side of the bottom plate;

[0031] Fifthly, according to the column foot positioning design, the leakage prevention structure made in the above steps is fixed to the column bottom floor steel reinforcement, and then the column bottom floor is poured;

[0032] Sixthly, the lower end of the column foot template is inserted into the space between the protection frame and the clamping plate, and after the mold is closed, the template is fixed by installing the positioning hoop along the column foot template elevation;

[0033] Seventhly, the column foot concrete is poured, and after the concrete reaches the specified strength, the protection frame and the pressing plate protruding from the surface of the column bottom floor are cut off.

[0034] Compared with the prior art, the present application has the beneficial effects that:

[0035] 1) The fixing force of the bottom of the column foot template is increased, and the formwork stability is strengthened; 2) A U-shaped slurry stopping structure is formed by simultaneously protecting the inside and outside of the bottom of the column foot template, which avoids the direct lateral outward leakage of the column foot concrete; 3) The installation of the template and the lower end leakage prevention structure is more convenient than the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a structural schematic diagram of embodiment one of the present application;

[0037] Figure 2 is a schematic diagram of the installation appearance of the present application;

[0038] Figure 3 is a schematic diagram of the improved example of the present application;

[0039] Figure 4 is a schematic diagram of the overall structure of the leak-proof embedded part of the present application;

[0040] Figure 5 is a schematic diagram of the present application for setting a through-pulp hole;

[0041] Figure 6 is a reference diagram of the protection frame pouring embedded structure of the present application;

[0042] Figure 7 is a schematic diagram of the template loading state of the present application;

[0043] Figure 8 is a schematic diagram of the change of the adjacent pressing plate angle after the template is loaded of the present application.

[0044] In the figure: 1, column foot template; 2, positioning hoop; 3, fixed plate; 4, bottom plate; 5, column bottom floor; 6, pressing plate; 7, interval; 8, screw; 9, through-pulp hole. DETAILED DESCRIPTION

[0045] The present application will be further described below in conjunction with examples, the purpose of which is only to better understand the content of the present application, therefore, the examples do not limit the protection scope of the present application.

[0046] Referring to Figure 1 , Figure 2 , embodiment one of the present application:

[0047] A column foot template 1 bottom leak-proof structure, including four column foot templates 1, the column foot template 1 is locked by positioning hoop 2 outside, so that the column foot template 1 is enclosed into a column foot pouring cavity, the column foot template 1 bottom is provided with a protection frame, the protection frame is composed of four fixed plates 3; the lower end of the protection frame is embedded in the column bottom floor 5 concrete, and the upper end of the protection frame is respectively attached to the outer surface of each column foot template 1.

[0048] The protection frame is fixed at the lower end of the column foot template 1, and the anti-leakage structure at this position is fixed to the completed floor in the prior art. Since the floor is uneven and the column bottom protection member is usually of a rigid structure, the floor cannot be well attached to the floor. After internal grouting, the concrete can directly flow laterally through the bottom gap. In the prior art, a flexible sealing gasket is usually used to block the gap, but the effect is limited by the unevenness and installation quality, and the anti-leakage effect is not ideal. The lower end of the protection frame is embedded in the floor concrete, and the upper end is sleeved outside the column foot template 1, thereby blocking the direct channel or gap of the column foot concrete laterally outward. The mortar or water needs to climb over the height of the protection frame to leak outside the template after penetrating into the lower end of the column foot template 1 under the internal expansion force. Since the fixed plate 3 is attached to the outer surface of the template in a surface-to-surface manner, the gap is small, and therefore the mortar is difficult to pass through the gap, thereby achieving the anti-leakage of the column foot formwork bottom.

[0049] Further, the bottom of the protection frame is further provided with a bottom plate 4, and the bottom plate 4 is vertically fixed with the fixed plate 3. The bottom plate 4 plays an anchoring role to prevent the fixed plate 3 from being pulled out of the concrete. When the protection frame is pre-buried and fixed, the large plane can also facilitate the connection with the steel structure of the column bottom floor 5.

[0050] Referring to Figure 3 , Figure 4 As an improved embodiment of the present application, the inner side of each fixed plate 3 is further provided with a pressing plate 6, and a gap 7 is arranged between the pressing plate 6 and the fixed plate 3, and the column foot template 1 is arranged in the gap 7. The pressing plate 6 is made of a material with elastic bending and elastic resetting capability, the lower end of the pressing plate 6 is embedded in the concrete of the column bottom floor 5, and the upper end of the pressing plate 6 is elastically pressed against the inner surface of the column foot template 1. As an option, the bottom plate 4 and the pressing plate 6 on each side of the column foot template 1 are integrated structures, which are folded from a metal sheet. The bottom plate 4 is horizontally arranged, and the pressing plate 6 is obliquely arranged, and the upper end of the pressing plate 6 is offset to the side of the fixed plate 3.

[0051] In this embodiment, the fixed plate 3 and the pressing plate 6 cooperate to clamp and fix the lower end of the column foot template 1 from the inner and outer sides of the column foot template 1, so that the fixing effect of the anti-leakage structure on the column foot template 1 is better. The pressing plate 6 applies outward pressure to the column foot template 1 from the inner side and cooperates with the positioning hoop 2 outside the column foot template 1 to bi-directionally constrain the column foot template 1. On the one hand, the pressing force of the pressing plate 6 and the inner surface of the column foot template 1 is ensured to achieve the purpose of stopping mortar. On the other hand, the column foot template 1 cannot be displaced inward before the concrete is poured, so that the template joint is not tight. The thin plate structure is selected, so that after the concrete is formed, there is no obvious under-concrete fault at the lower end of the column foot. The oblique arrangement of the pressing plate 6 and the specific inclination direction make the upper end of the pressing plate 6 more closely attached to the column foot template 1, and the width of the gap 7 allows the column foot template 1 to have a certain allowance when inserted, so that the column foot template 1 can be easily directly dropped to the bottom.

[0052] Optionally, referring toFigure 5 、 Figure 6 The part of the pressing plate 6 located in the concrete of the column bottom floor 5 is provided with a grout passing hole 9; the grout passing hole 9 facilitates the pre-burial of the structure, and specifically, when the concrete is poured around the periphery of the pre-buried structure, the grout can automatically fill into the interval 7, so that it is not necessary to specially pour grout into the narrow interval 7, and the structure of the grout passing hole 9 also ensures that the top of the concrete is relatively flat. Further, the grout passing hole 9 can also be provided on the bottom plate 4.

[0053] Optionally, the height of the pressing plate 6 is greater than the height of the fixed plate 3, and the height difference between the pressing plate 6 and the fixed plate 3 is at least the thickness of the column foot formwork 1; the connection between the column foot formwork 1 and the pre-buried part is facilitated, and specifically, the formwork is usually installed piece by piece, a piece of column foot formwork 1 is first slightly inclined, then the lower end of the column foot formwork 1 pushes the upper end of the pressing plate 6, and the lower end of the column foot formwork 1 is inserted into the interval 7; the pressing plate 6 is pressed to the surface of the formwork under the action of its own elasticity and the column foot formwork 1 and the fixed plate 3 are simultaneously pressed tightly.

[0054] Referring to Figure 4 、 Figure 5 The bottom plates 4 and the pressing plates 6 of the adjacent sides are welded at the positions of the folded angles; the height of the welding seam can be the pre-burial depth of the anti-leakage structure, and after welding, the integrity of the anti-leakage structure is better, and the installation is facilitated.

[0055] Referring to Figure 7 、 Figure 8 The width of the concrete of the column bottom floor 5 in the interval 7 between the pressing plate 6 and the fixed plate 3 is adapted to the column foot formwork 1, and when the lower end of the column foot formwork 1 is inserted, the pressing plate 6 is vertical; this limitation particularly indicates that the inclination angle of the pressing plate 6 should be appropriately set according to the construction condition, and particular attention should be paid to the fact that after the column bottom floor 5 is poured, the width of the interval 7 must still be able to meet the requirement of the insertion of the column foot formwork 1; specifically, as shown in Figure 8 the position of point A, after the column foot formwork 1 is inserted, each side pressing plate 6 is straight, so that the larger gap between the adjacent pressing plates 6 is reduced, and further closed, so that the grout is not easy to leak outward at this point.

[0056] The overlapping height of the pressing plate 6 and the column foot formwork 1 is 10mm-20mm; the outward pressure applied to the bottom of the formwork is large, the stability of the lower end of the formwork cooperating with the fixed plate 3 is good; and the length of the leakage path of the grout is increased.

[0057] The application also provides a construction method based on the anti-leakage structure of the bottom of the column foot formwork, which is performed according to the following steps:

[0058] Firstly, a metal sheet with a width equal to the width of each side column foot formwork 1 is taken and folded into an L-shaped angle plate, and the included angle of the L-shaped angle plate is less than 90 degrees.

[0059] Secondly, each L-shaped angle plate is uniformly placed, one angle side is placed flat as the bottom plate 4, and the other inclined angle side is placed upward as the clamping plate.

[0060] Third step, four L-shaped angle plate corners and corners are welded in turn.

[0061] Fourth step, four rigid fixing plates 3 are taken to fix the protection frame in turn, the protection frame is sleeved to the outside of the integral piece welded by the four L-shaped angle plates, the geometric centers are overlapped, the interval 7 is reserved between the inner side of the protection frame and the clamping plate, then the protection frame and the bottom plate 4 are fixed by screwing the screw 8 from the lower side of the bottom plate 4.

[0062] Fifth step, according to the column foot positioning, the anti-leakage structure made in the above steps is fixed to the column bottom plate 5 steel bars, then the column bottom plate 5 is poured.

[0063] Sixth step, the lower end of the column foot formwork 1 is inserted into the interval 7 between the protection frame and the clamping plate, after the mold is closed, the positioning hoop 2 is installed along the elevation of the column foot formwork 1 to fix the formwork.

[0064] Seventh step, the column foot concrete pouring is carried out, after the concrete reaches the specified strength, the formwork is removed, and the protection frame and the pressing plate 6 protruding from the surface of the column bottom plate 5 are cut off.

[0065] The present application has the beneficial effects that: 1) the lower end of the protection frame is embedded in the concrete of the floor, and the upper end overlaps the column foot formwork, completely blocking the channel or gap of the lateral outward leakage of the column foot concrete; 2) the present application clamps the column foot formwork from the inner and outer sides, forming a U-shaped gelling structure; 3) the present application not only makes the fixing effect of the lower end of the column foot formwork better, but also makes the connection and installation more convenient.

[0066] The above only describes the preferred and feasible embodiments of the present application, and does not limit the scope of the present application, and any equivalent changes made by applying the content of the present application and the drawings are included in the scope of the present application.

Claims

1. A leak-proof structure for the bottom of a column base template, comprising four column base templates (1), wherein the column base templates (1) are locked externally by positioning hoops (2), thereby forming a column base casting cavity around the column base templates (1), characterized in that: The bottom of the column foot template (1) is provided with a protection frame, the protection frame is combined by four fixed plates (3), the inner side of each fixed plate (3) is further provided with a pressing plate (6), a space (7) is arranged between the pressing plate (6) and the fixed plate (3), and the column foot template (1) is arranged in the space (7); the pressing plate (6) is made of a material with elastic bending and elastic resetting capability, the part of the pressing plate (6) located in the concrete of the column bottom floor (5) is provided with a grout passing hole (9); the bottom of the protection frame is further provided with a bottom plate (4), the bottom plate (4) is vertically fixed with the fixed plate (3), the lower end of the protection frame is embedded in the concrete of the column bottom floor (5), and the upper end is pressed against the inner surface of the column foot template (1) through the elasticity of the protection frame; the upper end of each fixed plate (3) of the protection frame is respectively attached to the outer surface of each column foot template (1).

2. The column footing formwork leak-proof structure according to claim 1, wherein: The bottom plate (4) and the pressing plate (6) on each side of the column foot template (1) are an integral structure, which is folded from a metal sheet, the bottom plate (4) is horizontally arranged, and the pressing plate (6) is arranged obliquely, and the upper end of the pressing plate (6) is offset to the side of the fixed plate (3).

3. The column footing formwork leak-proof structure according to claim 2, wherein: The height of the pressing plate (6) is greater than the height of the fixed plate (3), and the height difference between the pressing plate (6) and the fixed plate (3) is at least the thickness of the column foot template (1).

4. The column footing formwork leak-proof structure according to claim 2, wherein: The bottom plate (4) and the pressing plate (6) of the adjacent side are connected by angle welding.

5. The skid-form bottom leak-proof structure according to claim 1, wherein: The width of the concrete of the column bottom floor (5) in the space (7) between the pressing plate (6) and the fixed plate (3) is matched with the column foot template (1), and the pressing plate (6) is vertical when the lower end of the column foot template (1) is inserted.

6. The skid-form bottom leak-proof structure according to claim 1, wherein: The overlapping height of the pressing plate (6) and the column foot template (1) is 10mm-20mm.

7. The construction method of the bottom leakage-proof structure of the pile template according to any one of claims 1-6, characterized in that: The following steps are taken: Firstly, a metal sheet with a width equal to the width of each side of the column foot template (1) is taken, and is folded into an L-shaped angle plate, and the included angle of the L-shaped angle plate is less than 90 degrees; Secondly, each L-shaped angle plate is uniformly placed, one angle side is placed horizontally as the bottom plate (4), and the other inclined angle side is placed upward as the pressing plate; Thirdly, the four L-shaped angle plates are sequentially welded at the corners; Fourthly, four rigid fixed plates (3) are taken and sequentially fixed to form a protection frame, the protection frame is sleeved outside the integral piece formed by welding the four L-shaped angle plates, the geometric centers are coincided, a space (7) is reserved between the inner side of the protection frame and the clamping plate, and then the protection frame is fixed with the bottom plate (4) by screwing (8) from the lower side of the bottom plate (4); Fifthly, according to the column foot positioning design, the anti-leakage structure made by the above steps is fixed on the steel bars of the column bottom floor (5), and then the column bottom floor (5) is poured; Sixthly, the lower end of the column foot template (1) is inserted into the space (7) between the protection frame and the pressing plate, and after the mold is closed, the template is fixed by installing the positioning hoop (2) along the elevation of the column foot template (1); Seventhly, the column foot concrete is poured, and after the concrete reaches the specified strength, the mold is removed, and the protection frame and the pressing plate (6) protruding from the surface of the column bottom floor (5) are cut off.

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