CN113700332A - Construction method for blocking pay-off measuring hole of building construction engineering floor slab - Google Patents

Abstract

The invention discloses a construction method for plugging a pay-off measuring hole of a floor slab in a building construction project, and relates to the technical field of plugging of pay-off holes in the building industry. The prefabricated trapezoidal plugging block is lifted by the mold lifting mechanism, the stress is transferred to the floor slab, and the post-cast section is prevented from sinking. The invention aims to effectively solve the problem of platform staggering between the post-cast section of the pay-off measuring hole and the original floor, and avoid the increase of construction cost caused by the need of consuming manpower and material resources to perform secondary maintenance during ceiling construction.

Description

Construction method for blocking pay-off measuring hole of building construction engineering floor slab

Technical Field

The invention relates to the technical field of blocking of pay-off holes in the building industry, in particular to a construction method for blocking a pay-off measuring hole of a floor slab in a building construction project.

Background

After the construction of the existing building concrete main body is finished, the paying-off measuring hole left in the construction of the main body is generally required to be plugged. According to the traditional plugging method, steel bars are planted on two sides of the measuring hole, then the two steel bars with the planted bars are bound by steel wires, then a steel pipe scaffold formwork is erected on the next floor or a steel bar formwork is hung on the next floor, and finally same-model concrete pouring is carried out.

Disclosure of Invention

In order to solve the technical problems, the invention provides a construction method for plugging a pay-off measuring hole of a floor slab in a building construction project, which effectively solves the problem that the post-cast section of the pay-off measuring hole is staggered with the original floor slab, and avoids the increase of construction cost caused by the need of consuming manpower and material resources to perform secondary maintenance during the construction of a ceiling.

In order to realize the technical purpose, the invention adopts the following scheme: the construction method for blocking the floor pay-off measuring hole of the building construction project comprises the following steps:

s1, chiseling the side wall of the floor pay-off measuring hole by using an electric pick;

s2, cleaning the paying-off measuring hole, and placing the prefabricated concrete trapezoidal prism with the threaded steel bar into the drilled paying-off measuring hole;

s3, horizontally implanting steel bars with the same type as the steel bars of the floor slab into the floor slab, finally placing the customized mould hanging mechanism on the floor slab, connecting the mould hanging mechanism with the threaded steel bars on the precast concrete trapezoidal prism table by using threaded sleeves, and pouring concrete with the same type as the floor slab;

and S4, disassembling the mould hanging mechanism by rotating the threaded sleeve after initial setting and before final setting of the concrete, and performing surface treatment to finish the plugging operation.

Compared with the prior art, the invention has the beneficial effects that:

(1) according to the invention, the lifting force applied to the prefabricated trapezoidal prismoid by the mould lifting mechanism is upwards, the gravity of the trapezoidal prismoid is dispersed to the floor slab around the pay-off measuring hole through the mould lifting mechanism, and when the post-cast section is poured, the phenomenon of dislocation between the trapezoidal prismoid and the original floor slab caused by sinking of the post-cast section is effectively avoided;

(2) the operation is simple, and the problem that the construction cost is increased due to the fact that manpower and material resources are consumed to carry out secondary maintenance when the ceiling construction is carried out at the later stage is avoided;

(3) the filling of the irregular shape of the side wall of the pay-off measuring hole is ensured by utilizing the fluidity and plasticity of the concrete.

Drawings

FIG. 1 is a schematic structural view of a wire-laying measuring hole roughening provided by an embodiment of the present invention;

FIG. 2 is a schematic view of a concrete trapezoid block placed in a pay-off measuring hole according to an embodiment of the present invention;

FIG. 3 is a connection diagram of a formwork lifting mechanism and a precast concrete trapezoid block according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a mold lifting mechanism according to an embodiment of the present invention;

labeled as: 1. a floor slab; 2. a trapezoidal block; 3. a mould hanging mechanism; 31. a support bar; 32. a column; 33. a connecting rod; 34. a sleeve; 4. and (7) horizontal reinforcing steel bars.

Detailed Description

The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention, but the present invention is not limited thereto.

The invention provides a construction method for blocking a floor pay-off measuring hole in a building construction project, which comprises the following steps of:

step one, adopting an electric pick to chisel the periphery of a pay-off measuring hole of a floor slab 1, as shown in figure 1.

And step two, cleaning the pay-off measuring hole, and then putting the prefabricated concrete trapezoidal block 2 embedded with the threaded steel bar into the roughened pay-off measuring hole, as shown in figure 2. The concrete trapezoid blocks 2 are made by using a template tool, the bottom surface of the template is square, and the four side surfaces are inverted isosceles trapezoids to form a quadrangular frustum pyramid structure. When the concrete trapezoid block 2 is poured, the steel bar with the thread is vertically inserted into the concrete, so that the protruded thread steel bar is fixed on the upper end face of the concrete trapezoid prism table after final setting.

And step three, horizontally implanting horizontal reinforcing steel bars 4 which are designed to be the same as the original floor slab 1 into the floor slab 1, and manufacturing a mould hanging mechanism 3 at the same time. The die lifting mechanism 3 is composed of a support rod 31 and a threaded sleeve 34, the plane portion of the support rod 31 is a Y-shaped structure formed by three support rods, the three support rods are equal in length, an outer end point of each support rod is fixedly provided with a vertical downward upright post 32, the lower surface of a middle connecting point of the three support rods is fixedly provided with a vertical downward connecting rod 33, the lower portion of the connecting rod 33 is provided with external threads, and the lower portion of the connecting rod 33 is in threaded connection with one end of the threaded sleeve 34.

The customized formwork lifting mechanism 3 is placed into the floor slab 1, the upright column 32 is placed on the floor slab 1, the threaded sleeve 34 is connected with a steel bar (with threads) on the precast concrete trapezoidal block 2, as shown in fig. 3 and 4, the effect of lifting the concrete trapezoidal block 2 is achieved, concrete with the same type as the floor slab 1 is poured, and the post-pouring section is flush with the original floor slab 1 in height. Before the concrete is finally set, the weight of the precast concrete trapezoidal block 2 and the weight of the post-cast section are borne by the mold hanging mechanism 3, the stress is dispersed to the floor slab 1 around the pay-off measuring hole, the force applied to the side wall of the pay-off measuring hole by the precast concrete trapezoidal block 2 is reduced, and the phenomenon that the post-cast section presses down the precast concrete trapezoidal block 2 to sink and cause slab staggering with the original floor slab 1 is effectively prevented.

And step four, removing the mould hanging mechanism 3 through the rotation of the threaded sleeve 34 after the initial setting and before the final setting of the concrete, performing surface treatment, and finishing the plugging operation after the surface treatment.

Finally, it is noted that: the above-mentioned list is only the preferred embodiment of the present invention, and naturally those skilled in the art can make modifications and variations to the present invention, which should be considered as the protection scope of the present invention provided they are within the scope of the claims of the present invention and their equivalents.

Claims (1)

1. A construction method for plugging a floor pay-off measuring hole of a building construction project is characterized by comprising the following steps:

s1, chiseling the side wall of the floor pay-off measuring hole by using an electric pick;

s2, cleaning the paying-off measuring hole, and placing the prefabricated concrete trapezoidal prism with the threaded steel bar into the drilled paying-off measuring hole;

s3, horizontally implanting steel bars with the same type as the steel bars of the floor slab into the floor slab, finally placing the customized mould hanging mechanism on the floor slab, connecting the mould hanging mechanism with the threaded steel bars on the precast concrete trapezoidal prism table by using threaded sleeves, and pouring concrete with the same type as the floor slab;

and S4, disassembling the mould hanging mechanism by rotating the threaded sleeve after initial setting and before final setting of the concrete, and performing surface treatment to finish the plugging operation.

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