Multi-purpose hole tool for precast concrete staircase and its application method

Abstract

The multi-purpose hole fixture and application method of precast concrete staircase belong to the field of civil engineering technology. The precast concrete staircase of the present invention is only equipped with four multi-purpose hole fixtures, which can be used for demoulding in the preparation stage of precast concrete staircase; used for lifting during transportation and installation of precast concrete staircase; used for bottom installation and fixation of the support system, which significantly improves the safety and stability of the precast concrete staircase support system; and used for installation and connection of precast concrete staircase and its support, which is convenient and reliable; compared with conventional practices, it saves two demoulding hooks and four installation nails. Through such technical means, the quality of staircase construction is excellent, the efficiency is improved, the safety and reliability are improved, and the cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of civil engineering, and relates to assembled buildings, in particular to a multi-purpose hole tool for prefabricated concrete staircases and an application method thereof. Background Art

[0002] It is a common phenomenon in the construction process of stairs that the quality of construction engineering stairs is not easy to guarantee, the efficiency is low, the construction cost is time-consuming and the construction cost is high. It has become a consensus in the industry that the stairs are constructed in an assembled manner with the advantages of good quality, high efficiency, low construction cost and environmental friendliness. However, the quality, efficiency and cost of most technical solutions on the market are still unsatisfactory.

[0003] The invention patent application specification CN201910284627.7 discloses an assembled concrete stair landing beam and a construction method thereof. The stair landing slab is in the form of a cantilever slab with the landing beam as a support. The concrete stair landing beam and the landing slab are prefabricated and installed in an integrated manner, which solves the problems of difficult construction of concrete stair landing beams, increased working procedures and poor appearance quality. The externally thrown steel bars at the end of the prefabricated landing beam are eliminated, and a method of mechanically connecting the steel bars with a straight threaded sleeve is adopted at the end of the prefabricated landing beam to connect the internal longitudinal bars of the stair landing beam and the external steel bar section of the stair landing beam end that is connected and penetrates into its support. The connecting bolts at one end of the pier are screwed into the embedded hanging point nuts of the stair landing beam, and the prefabricated concrete stair section and the stair landing beam are connected by pouring fine stone concrete or grouting material into the installation hole of the prefabricated concrete stair section, thereby realizing the multi-purpose use of the embedded hanging point nuts of the stair landing beam, and the connection is more convenient and reliable. However, this solution has too many embedded nuts, which increases the cost. In addition, the support quality of the traditional formwork system is not easy to ensure, the efficiency is low, the construction cost is high, and materials are wasted.

[0004] Invention patent application specification CN201910048872.8 discloses the installation node and installation method of the support hinged concrete precast component, wherein an embedded iron piece is arranged at the bottom of the support end of the support hinged concrete precast component, with a hole in the center, and an inverted cone-shaped precast hole on the upper side of the hole; the support concrete component is placed on the support position of the concrete precast component, and mortar is spread on the top surface outside the connection hole; the concrete precast component is hoisted by a suspender and inserted into the connection hole, and the suspender is rotated to adjust to the installation height of the concrete precast component after removing the hook, and the suspender is removed after the mortar strength reaches 2MPa; the connecting steel bar is inserted into the inverted cone-shaped hole and the connection hole, and the surface is smoothed after the concrete grouting material is poured. The present invention adopts a reusable suspender, which can not only be used as a lifting ring, but also can be used to adjust the installation height and installation accuracy of the concrete precast component, which can save steel consumption, reduce the installation work intensity, improve the installation efficiency, accuracy and quality, and reduce the construction cost. However, the embedded iron parts of this solution are complicated to manufacture and it is not convenient to connect the hangers, and there is still room for improvement in efficiency and cost.

[0005] It is necessary to further optimize and improve the defects of the above-mentioned technologies. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a multi-purpose hole tool and an application method for prefabricated concrete staircase segments. The multi-purpose hole tool has multiple uses and can fully play its role, so that the quality of the finished concrete staircase is excellent, the production preparation and construction and installation are efficient and safe and reliable, raw materials are saved, the environment is more friendly, and the overall construction cost is reduced.

[0007] The multi-purpose hole tool of the precast concrete staircase is arranged at the platforms at both ends of the concrete staircase, and two are arranged at each end. The multi-purpose hole tool comprises a hole tool body and an inner wall threaded section. The hole tool body is a hollow pipe, and the inner wall of the hole tool body is provided with an inner wall threaded section; the inner wall threaded section is a standard thread, and the inner wall threaded section is arranged through the entire length of the inner wall of the hole tool body, or is arranged in a local section of the inner wall of the hole tool body.

[0008] The application method of the multi-purpose hole tool for precast concrete staircase is characterized by: using the multi-purpose hole tool for precast concrete staircase to demould the precast concrete staircase,

[0009] During the preparation stage of precast concrete stair sections, when the concrete strength reaches the demolding strength, the top surface of the concrete stair section is placed upward using the flipping process technology; the top, side and end surface molds of the concrete stair section are removed, the bolt hanger is taken, and the bolt hanger is screwed into the inner wall threaded section of the multi-purpose hole fixture, and the precast concrete stair section is lifted and separated from the bottom surface mold, and hoisted to the cleaning, inspection or storage and transportation station, completing the application of the multi-purpose hole fixture to demold the precast concrete stair section.

[0010] The application method of the multi-purpose hole tool for precast concrete staircase is characterized in that: the multi-purpose hole tool for precast concrete staircase is used to hoist the precast concrete staircase.

[0011] During the transportation and installation of precast concrete stair sections, take the bolt hanger, screw the bolt hanger into the inner wall thread section of the multi-purpose hole fixture, lift the precast concrete stair section from the storage site or transportation vehicle, and hoist it to the transportation or installation site, completing the application of the multi-purpose hole fixture to lift the precast concrete stair section.

[0012] The application method of the multi-purpose hole tool of the precast concrete staircase is characterized in that: the multi-purpose hole tool of the precast concrete staircase is used to install the precast concrete staircase support system to stably connect.

[0013] The stair platform adopts the prefabricated construction stage, and the installation of the upper stair platform adopts the support system for installing precast concrete stairs; the base of the support system is connected by bolts, and the bolts are screwed into the inner wall thread section of the multi-purpose hole; or the base of the support system is connected by plug-in connection, and the tenon is inserted into the multi-purpose hole, completing the application of the multi-purpose hole for the stable connection of the installation of the precast concrete stair support system.

[0014] The application method of the multi-purpose hole tool for precast concrete staircase is characterized in that: the multi-purpose hole tool for precast concrete staircase is used to connect and install the precast concrete staircase and the support.

[0015] Pour grouting material or high-strength mortar into the grooves of the multi-purpose eyelet and its lower support, insert the connecting steel bar segment therein, smooth the top surface and press it; when the strength of the grouting material or high-strength mortar reaches the design requirements, complete the application of the multi-purpose eyelet for the connection and installation of the precast concrete stair section and the support.

[0016] Through the above design scheme, the present invention can bring the following beneficial effects: multi-purpose hole tools and application methods for precast concrete staircases, the precast concrete staircases are only provided with four multi-purpose hole tools, one tool has multiple uses, which are used for demoulding in the preparation stage of precast concrete staircases; and for lifting the precast concrete staircases during transportation and installation; and then used for bottom installation and fixing of the support system, which significantly improves the safety and stability of the precast concrete staircase support system; and is also used for the installation and connection of the precast concrete staircases and their supports, and the connection is convenient and reliable; compared with conventional practices, two demoulding hooks and four installation nails are saved. Through such technical means, the quality of the staircases is excellent, the efficiency is improved, the safety and reliability are improved, and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below with reference to the accompanying drawings and specific embodiments:

[0018] Figure 1 It is a top view schematic diagram of the multi-purpose hole tool of the present invention.

[0019] Figure 2 It is a cross-sectional schematic diagram of the multi-purpose hole tool of the present invention.

[0020] Figure 3 It is a schematic plan view of the precast concrete staircase section of the present invention.

[0021] Figure 4 It is a schematic cross-sectional view of the precast concrete staircase section of the present invention.

[0022] Figure 5 It is a schematic plan view of the precast concrete staircase section of the present invention at the installation station.

[0023] Figure 6 It is a cross-sectional schematic diagram of the precast concrete staircase section of the present invention at the installation station.

[0024] Figure 7 The schematic plan view of the precast concrete staircase section of the present invention after installation.

[0025] Figure 8 The schematic cross-sectional view of the precast concrete staircase section of the present invention after installation is completed.

[0026] In the figure, 1 is a staircase section, 2 is a multi-purpose hole tool, 3 is an inner wall thread section, and 4 is a hole tool body. DETAILED DESCRIPTION

[0027] The multi-purpose holes of the prefabricated concrete staircase are arranged at the platforms at both ends of the concrete staircase 1, such as Figure 1 and Figure 2 As shown, the multi-purpose hole tool 2 includes a hole tool body 4 and an inner wall threaded section 3. The hole tool body 4 is a hollow tube, and the inner wall of the hole tool body 4 is provided with an inner wall threaded section 3; the inner wall threaded section 3 is a standard thread, and the inner wall threaded section 3 is arranged through the entire length of the inner wall of the hole tool body 4, or is arranged in a local section of the inner wall of the hole tool body 4.

[0028] During the construction of prefabricated concrete stairs, Figure 3 to Figure 8 As shown, the multi-purpose hole tools for precast concrete staircases include the following application methods:

[0029] 1. Demoulding of precast concrete staircase 1

[0030] In the stage of preparing the precast concrete stair segment 1, after the concrete strength reaches the demolding strength, the conventional flipping process technology is used to place the top surface of the concrete stair segment 1 upward; the top, side and end surface molds of the concrete stair segment 1 are removed, and the bolt hanger is taken and screwed into the inner wall threaded section 3 of the multi-purpose hole tool 2, and the precast concrete stair segment 1 is lifted and separated from the bottom surface mold, and is lifted and placed on the cleaning, inspection or storage and transportation station, completing the application of the multi-purpose hole tool 2 to demold the precast concrete stair segment 1;

[0031] 2. Hoisting of concrete staircase section 1

[0032] During the transportation and installation of the precast concrete stair segment 1, a bolt hanger is taken and screwed into the inner wall thread segment 3 of the multi-purpose hole fixture 2, and the precast concrete stair segment 1 is lifted from the storage site or the transportation vehicle and placed on the transportation or installation station, thus completing the application of the multi-purpose hole fixture 2 to the lifting of the precast concrete stair segment 1;

[0033] 3. Nuts or sockets for safe and stable connection of precast concrete stair support systems

[0034] When the staircase platform adopts the assembled construction implementation scheme, the upper staircase platform shall be installed by the support system for installing the prefabricated concrete staircase; when the base of the support system adopts bolt connection, the bolts are directly screwed into the inner wall thread section 3 of the multi-purpose hole 2; or when the base of the support system adopts plug-in connection, the tenon is directly inserted into the multi-purpose hole 2;

[0035] 4. Used for the connection and installation of precast concrete staircase sections and supports

[0036] After the above three uses of the multi-purpose hole fixture 2 are completed, the multi-purpose hole fixture 2 is used for the connection and installation of the precast concrete stair section 1 and the support. First, grouting material or high-strength mortar is poured into the grooves of the multi-purpose hole fixture 2 and its lower support, and the connecting steel bar section is inserted therein, and then the top surface is smoothed and pressed; when the strength of the grouting material or high-strength mortar reaches the design requirements, all applications of the multi-purpose hole fixture 2 are completed.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An application method of a multi-purpose hole tool for a precast concrete staircase, wherein the multi-purpose hole tools for a precast concrete staircase are arranged at platforms at both ends of a concrete staircase (1), and two holes are arranged at each end, wherein the multi-purpose hole tool (2) comprises a hole tool body (4) and an inner wall threaded section (3), wherein the hole tool body (4) is a hollow pipe, and the inner wall of the hole tool body (4) is provided with an inner wall threaded section (3); the inner wall threaded section (3) is a standard thread, and the inner wall threaded section (3) is arranged through the entire length of the inner wall of the hole tool body (4), or is arranged in a partial section of the inner wall of the hole tool body (4); wherein the multi-purpose hole tool (2) comprises a hole tool body (4) and an inner wall threaded section (3); wherein the inner wall threaded section (3) is a standard thread, and the inner wall threaded section (3) is arranged through the entire length of the inner wall of the hole tool body (4), or is arranged in a partial section of the inner wall of the hole tool body (4); wherein the multi-purpose hole tool (2) comprises a hole tool body (4) and an inner wall threaded section (3) of the hole tool body (4). The multi-purpose hole fixture of the precast concrete staircase is used to install the precast concrete staircase support system to stably connect. The staircase platform adopts the assembled construction stage, and the upper staircase platform adopts the support system for installing precast concrete stairs; the base of the support system adopts bolt connection, and the bolt is screwed into the inner wall thread section (3) of the multi-purpose hole (2); or the base of the support system adopts plug-in connection, and the tenon is inserted into the multi-purpose hole (2), completing the application of the multi-purpose hole (2) to the stable connection of the installation of the precast concrete staircase support system; or use the multi-purpose hole tool of the precast concrete staircase to demould the precast concrete staircase (1), During the preparation of the precast concrete stair segment, when the concrete strength reaches the demoulding strength, the concrete stair segment (1) is placed with the top surface facing upwards by using a flipping process technology; the top, side and end surface molds of the concrete stair segment (1) are removed, a bolt hanger is taken, and the bolt hanger is screwed into the inner wall threaded section (3) of the multi-purpose hole tool (2), and the precast concrete stair segment (1) is lifted and separated from the bottom surface mold, and is lifted and placed on a cleaning, inspection or storage and transportation station, completing the application of the multi-purpose hole tool (2) to demould the precast concrete stair segment (1).

2. The application method of the multi-purpose hole tool for precast concrete staircase according to claim 1 is characterized by: Or use the multi-purpose hole tool for precast concrete staircase to hoist the precast concrete staircase (1), During the transportation and installation of the precast concrete stair segment (1), a bolt hanger is taken and screwed into the inner wall threaded section (3) of the multi-purpose hole fixture (2), and the precast concrete stair segment (1) is lifted from the storage site or the transportation vehicle and placed on the transportation or installation site, thus completing the application of the multi-purpose hole fixture (2) to the lifting of the precast concrete stair segment (1).

3. The application method of the multi-purpose hole tool for precast concrete staircase according to claim 1 is characterized by: Or use the multi-purpose hole tool of the precast concrete staircase to connect and install the precast concrete staircase (1) with the support. Grouting material or high-strength mortar is poured into the grooves of the multi-purpose hole fixture (2) and the support at the bottom thereof, the connecting steel bar section is inserted therein, and the top surface is smoothed and pressed; when the strength of the grouting material or high-strength mortar reaches the design requirements, the application of the multi-purpose hole fixture (2) to the connection and installation of the precast concrete staircase section (1) and the support is completed.

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