A quick and accurate positioning device for fabricated precast slabs and a method of use

Abstract

The application provides a quick and accurate positioning device for fabricated precast slabs and a use method thereof, and belongs to the technical field of fabricated buildings. The device comprises a positioning mechanism, and the positioning mechanism comprises a base steel plate, a sleeve fixedly connected to the base steel plate, a screw threadedly connected to the sleeve, and an upper supporting steel plate fixed to the top of the screw and used for supporting the precast slab. The adjustable height of the positioning mechanism ensures the flatness of the precast slabs during installation. The precast slab is supported by the positioning mechanism, so that a certain gap is left between the precast slab and the cement stabilized macadam base layer below the precast slab. The gap is filled with cast-in-place concrete to prevent cavities from being formed at the bottom of the precast slab and cracking of the precast slab caused by local stress. The use method can effectively prolong the service life of the precast slab. Meanwhile, a scale is arranged on the base steel plate, so that the installation precision of the precast slab is ensured, the installation speed of the precast slab is increased, and the precast slab is prevented from deviating during installation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of prefabricated buildings, and particularly relates to a prefabricated plate rapid positioning device and a use method thereof. BACKGROUND

[0002] With the development of social economy and technology, the prefabricated roads and airport runways are increasing year by year, and the application range is more extensive. The base under the prefabricated road and airport runway usually adopts a cement stabilized macadam structure. The flatness of the top surface of the cement stabilized macadam is influenced by factors such as raw materials and operation level, and cannot reach the completely flat degree. When the prefabricated concrete plate is installed, the bottom will produce a cavity, causing the prefabricated plate to be locally stressed, resulting in local cracking and damage, and affecting the service life.

[0003] Therefore, a prefabricated plate installation device and installation method capable of completely leveling the prefabricated plate during installation and eliminating the cavity at the bottom of the prefabricated plate after installation are needed to solve this problem. SUMMARY

[0004] In order to solve the problems existing in the prior art, a prefabricated plate rapid positioning device and a use method thereof are provided.

[0005] The technical scheme adopted by the application to solve the technical problems is:

[0006] The application provides a prefabricated plate rapid positioning device, which comprises:

[0007] A positioning mechanism comprises a base steel plate, the base steel plate is fixedly connected with not less than four sleeves, the sleeves are threadedly connected with lead screws, the top of the lead screws is fixedly connected with an upper support steel plate, and the upper support steel plate is used for supporting the prefabricated plate.

[0008] Preferably, four scales are arranged at the center position of the base steel plate, and the scales are arranged in a "cross" shape.

[0009] Preferably, the base steel plate has a rectangular structure.

[0010] Preferably, not less than one through hole is formed in the side wall of the sleeve.

[0011] Preferably, the upper support steel plate has a square structure.

[0012] The application further provides a use method of the prefabricated plate rapid positioning device, which comprises the following steps:

[0013] S1: cement stabilized macadam base construction;

[0014] S2: measurement and line laying, and determination of the plane position of the positioning mechanism;

[0015] S3: Excavate several small pits at the measuring position;

[0016] S4: Install positioning mechanisms inside the small pits;

[0017] S5: Adjust the accurate plan position of the positioning mechanisms and the top elevation of the base steel plate;

[0018] S6: Manually rotate the lead screw to adjust the supporting height of the positioning mechanisms;

[0019] S7: Install the prefabricated plate above the positioning mechanisms;

[0020] S8: Perform grouting treatment on the gap between the prefabricated plate and the cement stabilized macadam base.

[0021] Preferably, in S2-S3, the lofting is performed by a total station, and after lofting, a chalk line is scattered to mark, a 5cm wide area is provided around the chalk line, and then a corner grinder is used to cut the joint, and after cutting the joint, the installation position of the positioning mechanism is manually chiseled out by an electric hammer, and if unevenness occurs on the bottom surface of the small pit, fine sand should be laid to level.

[0022] Preferably, in S6, the actual thickness of the prefabricated plate is measured in advance, the designed top elevation of the prefabricated plate is reduced by the actual thickness and the top elevation of the base steel plate to obtain the height that needs to be adjusted, and then the height of the positioning mechanism is adjusted by manually rotating the lead screw with a wrench.

[0023] Preferably, in S7, the prefabricated plate is installed by a crane, the plan position of the prefabricated plate is quickly determined by a scale during installation, and after the position is determined, the prefabricated plate is lowered above the positioning mechanism to complete the installation of the prefabricated plate.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] 1. The prefabricated plate is supported by the positioning mechanisms, the four corners of the prefabricated plate are located above different positioning mechanisms, and the height of the prefabricated plate can be adjusted to ensure the flatness when multiple prefabricated plates are installed; the prefabricated plate is supported by the positioning mechanisms to ensure a certain gap between the prefabricated plate and the cement stabilized macadam base, the gap is filled with ductile pipe concrete to prevent cavities at the bottom of the prefabricated plate, local cracking caused by the cavities is avoided, and the service life of the prefabricated plate can be effectively prolonged by using the method.

[0026] 2. The scale is arranged on the base steel plate in the positioning mechanism, the plan position of the prefabricated plate is quickly determined by the scale during installation of the prefabricated plate below, the installation speed of the prefabricated plate is accelerated, the accuracy of the prefabricated plate during installation is ensured, and the prefabricated plate is prevented from deviating during installation. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Fig. 1 This is a schematic diagram of the positioning mechanism structure of the present invention;

[0029] Fig. 2 This is a front view of the prefabricated panel installation of the present invention;

[0030] Fig. 3 This is a top view of the prefabricated panel installation of the present invention;

[0031] Explanation of reference numerals in the attached figures:

[0032] 1-Positioning mechanism; 11-Base steel plate; 12-Sleeve; 13-Threaded rod; 14-Upper support steel plate; 15-Scale; 2-Precast slab; 3-Cement-stabilized crushed stone base layer; 4-Small pit; 5-Cement grout; 6-Slab joint; 7-Fine sand. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0034] like Figs. 1-3 As shown, this embodiment proposes a prefabricated slab rapid positioning device, including a base steel plate 11. In this embodiment, the base steel plate 11 has a rectangular structure, which makes the contact area between the base steel plate 11 and the bottom of the pit 4 larger and the stability better. At least four sleeves 12 are fixedly connected to the base steel plate 11. The sleeves 12 are internally threaded with screw rods 13. The top of the screw rods 13 is fixedly connected to an upper support steel plate 14, which is used to support the prefabricated slab 2. In this embodiment, four sleeves 12 are fixedly set, and correspondingly, four screw rods 13 and upper support steel plates 14 are set. Each upper support steel plate 14 corresponds to one corner of a prefabricated slab 2. Several prefabricated slabs 2 are supported by several upper support steel plates 14. The screw rods 13 can adjust the height of the upper support steel plates 14 to ensure the flatness of the prefabricated slabs 2 on the upper support steel plates 14. In this embodiment, the prefabricated slab 2 is a precast concrete component containing steel bars produced and processed in a prefabrication yard.

[0035] Furthermore, the upper support steel plate 14 has a rectangular structure and is made of steel plate material, which makes the support area of ​​the upper support steel plate 14 and the precast slab 2 larger and can support the precast slab 2 more stably. At the same time, reinforcing ribs can be set between the upper support steel plate 14 and the lead screw 13 to enhance the load-bearing capacity of the upper support steel plate 14.

[0036] Further, four scales 15 are arranged at the center of the base steel plate 11 in a "cross" structure in a clockwise direction, which can quickly determine the planar position of the prefabricated slab 2, accelerate the installation speed of the prefabricated slab 2, and improve the installation accuracy of the prefabricated slab 2.

[0037] Further, the sleeve 12 is connected with the base steel plate 11 through a reinforcing rib, which further enhances the bearing capacity of the sleeve 12, and a plurality of through holes are formed in the side wall of the sleeve 12, which are used for allowing the cement slurry 5 to enter the sleeve 12 during the concrete grouting process, and for further fixing the lead screw 13 at the current height after the concrete is formed.

[0038] The working principle of the device is as follows:

[0039] The positioning mechanism 1 is placed in the small pit 4, and the height of the prefabricated slab 2 is measured. The height of the prefabricated slab 2 is adjusted by rotating the lead screw 13 by hand to adjust the height of the upper supporting steel plate 14. After the height of the upper supporting steel plate 14 is adjusted, the prefabricated slab 2 is installed by a crane. The planar position of the prefabricated slab 2 is quickly determined by the scale 15 during installation. After the position is determined, the prefabricated slab 2 is lowered onto the upper supporting steel plate 14, and then grouting is performed at the gap. After the cement slurry 5 is formed, the installation of the prefabricated slab 2 is completed. The adjustable height of the positioning mechanism 1 ensures the flatness of the installation of the prefabricated slab 2. The grouting effectively prevents the local cracking of the prefabricated slab 2 caused by the cavity at the bottom of the prefabricated slab 2. The service life of the prefabricated slab 2 is extended to a certain extent.

[0040] The application also provides a use method of the prefabricated slab quick positioning device.

[0041] S1: Cement stabilized gravel base 3 construction;

[0042] The cement is mixed by factory mixing method, and the mixed cement is spread by a paver;

[0043] S2: Measure and determine the planar position of the positioning mechanism 1;

[0044] S3: Excavate a plurality of small pits 4 at the measured position;

[0045] In S2-S3, the total station is used for lofting, and the lofting is marked by scattering the gray line, and the gray line is widened by 5cm, and then the angle grinder is used to cut the joint of the cement stabilized macadam base 3, and the position of the positioning mechanism 1 is manually chiseled by the electric hammer after the joint is cut, and the position is a small pit 4, the side wall of the small pit 4 is in a slope structure, if the bottom surface of the small pit 4 is uneven, fine sand 7 should be laid to flatten, so as to facilitate the subsequent stable installation of the positioning mechanism 1.

[0046] S4: installing the positioning mechanism 1 in the small pit 4;

[0047] S5: adjusting the accurate plane position and the top elevation of the base steel plate 11 of the positioning mechanism 1;

[0048] S6: manually rotating the lead screw 13 to adjust the supporting height of the positioning mechanism 1;

[0049] In S6, the actual thickness of the prefabricated plate 2 is measured in advance, the designed elevation of the top surface of the prefabricated plate 2 is subtracted by the actual thickness and the top elevation of the base steel plate 11, and then the height of the positioning mechanism 1 is adjusted by manually rotating the lead screw 13 with a wrench;

[0050] S7: installing the prefabricated plate 2 above the positioning mechanism 1;

[0051] In S7, the prefabricated plate 2 is installed by the cooperation of the crane, the plane position of the prefabricated plate 2 is quickly determined by the scale 15 during the installation, and the prefabricated plate 2 is lowered above the positioning mechanism 1 after the position is determined, and the installation of the prefabricated plate 2 is completed; the prefabricated plate 2 is in a square structure in this embodiment, and the four corners of the prefabricated plate 2 correspond to different positioning mechanisms 1 respectively, and the cooperation of the several prefabricated plates 2 and the positioning mechanisms 1 enables the prefabricated plate 2 to maintain the corresponding flatness;

[0052] S8: grouting treatment is performed on the gap between the prefabricated plate 2 and the cement stabilized macadam base 3; the gap between the bottom of the prefabricated plate 2 and the prefabricated plates 2 is filled with slurry to prevent cavities from being generated at the bottom of the prefabricated plate 2 during the installation.

[0053] It is worth noting that a plate joint 6 is reserved between the adjacent prefabricated plates 2 during the installation of the prefabricated plate 2, so as to facilitate the subsequent grouting of the bottom of the prefabricated plate 2, and the grouted cement slurry 5 fills the plate joint 6.

[0054] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A method for using a quick and accurate positioning device for fabricated precast panels, characterized in that, The application discloses a rapid and accurate positioning device for fabricated precast slabs. The positioning mechanism (1) comprises a base steel plate (11), four sleeves (12) are fixedly connected to the base steel plate (11), a lead screw (13) is screw-connected in the sleeve (12), an upper supporting steel plate (14) is fixedly connected to the top of the lead screw (13), and the upper supporting steel plate (14) is used for supporting a precast slab (2); four corners of the precast slab (2) are located above different positioning mechanisms (1) respectively. Four scales (15) are arranged at the center of the base steel plate (11) and are arranged in a cross shape. At least one through hole is formed in the side wall of the sleeve (12), and the through hole is used for allowing cement slurry (5) to enter the sleeve (12) during concrete grouting. The method comprises the following steps. S1: cement stabilized gravel base (3) construction; S2: measurement and setting-out, determination of the plane position of the positioning mechanism (1); S3: excavation of a plurality of small pits (4) at the measurement position; S4: installation of the positioning mechanism (1) in the small pit (4); S5: adjustment of the accurate plane position of the positioning mechanism (1) and the top elevation of the base steel plate (11); S6: manual rotation of the lead screw (13) to adjust the supporting height of the positioning mechanism (1); S7: installation of the precast slab (2) above the positioning mechanism (1); S8: grouting treatment of the gap between the precast slab (2) and the cement stabilized gravel base (3); In S2-S3, total station setting-out is performed, and a chalk line is scattered to mark the setting-out line; the setting-out line is widened by 5 cm around the setting-out line, then an angle grinder is used to cut a joint, and a manual electric hammer is used to chisel the installation position of the positioning mechanism (1); if the bottom surface of the small pit (4) is uneven, fine sand (7) is paved to level the bottom surface; In S6, the actual thickness of the precast slab (2) is measured in advance, the designed height of the top surface of the precast slab (2) is reduced by the actual thickness, and the height of the top surface of the base steel plate (11) is obtained, then a wrench is used to rotate the lead screw (13) to adjust the height of the positioning mechanism (1); In S7, the precast slab (2) is installed by cooperation of a crane; the plane position of the precast slab (2) is quickly determined by the scales (15) during installation, the precast slab (2) is lowered above the positioning mechanism (1) after the position is determined, and the installation of the precast slab (2) is completed.

2. The use method of the quick and accurate positioning device for the fabricated precast slab according to claim 1, characterized in that, The base steel plate (11) has a rectangular structure.

3. The use method of the quick and accurate positioning device for the fabricated precast slab according to claim 1, characterized in that, The upper supporting steel plate (14) has a square structure.

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