Device for controlling thickness of structural slab and reinforcing steel bar protective layer and construction method

Abstract

The invention discloses a device for controlling the thickness of a structural slab and a steel bar protective layer. The device comprises a plurality of precast blocks, embedded steel bars penetrating through the precast blocks and bolts inserted into the precast blocks. The prefabricated block is a cylindrical body and comprises a bolt cap located in the center of the upper bottom face of the prefabricated block, a reserved hole located in the lower portion of the bolt cap and parallel to the axis direction of the prefabricated block, and a steel bar reserved hole vertically penetrating through the side face of the prefabricated block in the axis direction of the prefabricated block. Wherein the preformed hole is communicated with the bolt cap and allows the bolt to enter in a rotating manner; the embedded steel bars penetrate through the steel bar reserved holes, the embedded steel bars and the structural slab are fixed, and then the distance of the bolts entering the reserved holes is adjusted, so that the thickness of the structural slab and the thickness of a steel bar protective layer are controlled; the invention further discloses a corresponding construction method. The thickness of the structural slab and the thickness of the steel bar protective layer are controlled, operation is convenient, and construction safety and stability are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of building engineering, and more specifically, to a device and a construction method for controlling the thickness of a protective layer of a structural plate and a steel bar. Background Art

[0002] In the process of concrete building construction, how to effectively control the thickness of the protective layer of the structural slab and the upper and lower layers of steel bars has always been a difficult point in the field of engineering technology. At present, there is a lack of reliable measures in practice to ensure the accuracy of the thickness, which often leads to uneven thickness of the floor slab and large displacement of the steel bars of the structural slab, which in turn buries hidden dangers for the overall construction quality of the project. Specifically, the current common practice for controlling the thickness of the steel bar protective layer of the structural slab is to use finished cement pads, while the control of the thickness of the structural slab depends on the manual measurement of the control line during the pouring process. However, since the cement pad is small in size and difficult to fix, it is easy to shift during the subsequent construction process, thus losing its due effectiveness; at the same time, the method of manually measuring the thickness of the structural slab through the control line has a large error and is affected by various factors. It is difficult to ensure the accuracy of the thickness of the structural slab, which ultimately affects the quality of the structural slab.

[0003] In order to solve this problem, some existing technologies have effectively controlled the thickness and protective layer of the floor slab by designing specific methods and devices to prevent the pad from being damaged and displaced during the concrete pouring process. However, most of these methods lack flexibility and are difficult to adjust in real time according to complex on-site construction conditions. For example, some methods require pre-reserved grooves before the steel bars are tied, which not only increases the complexity of the construction, but also limits the freedom of construction. In addition, although some combined pads can effectively control the thickness and protective layer of the floor slab, their production is complicated, the installation process is cumbersome, and the size adjustment range is limited, which is not conducive to improving construction efficiency. As for some control devices, although they can achieve better control effects in theory, they require a large number of customized steel bar brackets in actual operation, which not only increases the cost but also reduces the ease of use of the device. At the same time, these devices usually rely on specific components (such as water stop ring wings) to control the thickness of the floor slab. The use of these components is not only complicated to operate, but also their ability to adjust the size is relatively limited, which is difficult to meet the diverse construction needs. Summary of the invention

[0004] In view of the above defects or improvement requirements of the prior art, the present invention aims to solve the problems in the prior art.

[0005] In order to achieve the above-mentioned object, according to a first aspect of the present invention, there is provided a device for controlling the thickness of a protective layer of a structural plate and a steel bar, comprising a plurality of prefabricated blocks, embedded steel bars passing through the interior of the prefabricated blocks, and bolts inserted into the prefabricated blocks;

[0006] The prefabricated block is a columnar body, and comprises a bolt cap located at the center of the upper bottom surface of the prefabricated block, a reserved hole located directly below the bolt cap and parallel to the axis direction of the prefabricated block, and a steel bar reserved hole vertically penetrating the side surface of the prefabricated block along the axis direction of the prefabricated block; wherein the reserved hole is connected to the bolt cap and accommodates the rotational entry of the bolt;

[0007] The thickness of the protective layer of the structural plate and the steel bar is controlled by passing the embedded steel bar through the steel bar reserved hole and fixing the embedded steel bar to the structural plate, and then adjusting the distance that the bolt enters into the reserved hole.

[0008] Furthermore, the prefabricated block also includes a matrix, and the compressive strength of the material used for the matrix is ​​not lower than the compressive strength of the concrete of the structural slab.

[0009] Furthermore, the prefabricated block also includes a sensor, which is arranged on the inner wall of the base in the area corresponding to the reserved hole. The sensor includes a displacement sensor for estimating the thickness of the structural plate and the steel bar protective layer by measuring the distance the bolt enters the reserved hole, a stress sensor for monitoring the strain caused by the force inside the base and estimating the stress, and a temperature sensor for monitoring the internal temperature of the base.

[0010] Furthermore, threaded areas are provided at both ends of the bolt, and the threaded areas match the bolt caps. The thickness of the protective layer of the structural plate and the steel bar is controlled by rotating the two ends of each bolt into the bolt caps of the two prefabricated blocks and controlling the depth of the bolt passing through the bolt caps and entering the reserved holes.

[0011] Furthermore, a scale mark is set on the bolt, and the overall flatness of the structural plate and the steel bar protective layer is controlled by controlling the scale mark of the bolt corresponding to the bottom of the bolt cap connected to the upper part of the bolt and the scale mark of the bolt corresponding to the top of the bolt cap connected to the lower part of the bolt.

[0012] Furthermore, the bolt includes a plurality of limiting holes and limiting members, and a plurality of the limiting holes are arranged at set intervals on the bolt, and the limiting holes vertically penetrate the side surface of the bolt along the axial direction of the bolt.

[0013] Furthermore, the size of the limiting member matches the limiting hole. After the bolt cap is positioned on the bolt, two limiting holes closest to the bottom of the bolt cap connected to the upper part of the bolt and the top of the bolt cap connected to the lower part of the bolt are selected, and the limiting members are inserted respectively.

[0014] According to a second aspect of the present invention, a construction method of a device for controlling the thickness of a structural plate and a steel bar protective layer is provided, which is implemented by using the device for controlling the thickness of a structural plate and a steel bar protective layer, and comprises the following steps:

[0015] S1, material preparation, preparing the prefabricated blocks, embedded steel bars and bolts, and roughening the surfaces of the prefabricated blocks;

[0016] S2, the device is spliced, and each two of the prefabricated blocks are connected by one of the bolts to form a combined concrete prefabricated block consisting of the two prefabricated blocks and one of the bolts. The bolts are screwed into the reserved holes through the bolt caps by rotating the bolts, and the depth of the bolts entering the reserved holes is adjusted so that the height of the combined concrete prefabricated block is consistent with the thickness of the structural plate;

[0017] S3, installation, after tying the reinforcement of the structural plate, place the assembled precast concrete block at the set position of the structural plate, tie the reinforcement of the structural plate to the embedded reinforcement of the assembled precast concrete block with a tie wire; when pouring concrete, use the upper plane of the assembled precast concrete block as the reference line for controlling the thickness of the poured concrete of the structural plate.

[0018] Furthermore, the steps of preparing the prefabricated blocks, embedded steel bars and bolts in S1 are:

[0019] S10, determining the materials of the prefabricated blocks, embedded steel bars and bolts, and determining the sizes of the embedded steel bars and bolts according to on-site construction requirements;

[0020] S20, according to the size of the embedded steel bar, determine the distance and size between the steel bar reserved hole of the prefabricated block and the lower bottom surface, so that the steel bar reserved hole matches the embedded steel bar; according to the size of the bolt, select the bolt cap and determine the size of the reserved hole;

[0021] S30, during the processing of the prefabricated block, before the base is air-dried, a bolt cap is placed just above the reserved hole, and the embedded steel bar is inserted into the steel bar reserved hole, so that the embedded steel bar and the prefabricated block become a whole.

[0022] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0023] 1. The device and construction method for controlling the thickness of the protective layer of the structural plate and the steel bar of the present invention controls the thickness of the structural plate and the protective layer thickness of the structural plate steel bar through the combined concrete prefabricated blocks, thereby solving the problem of difficult control of the thickness of the structural plate and the protective layer thickness of the steel bar in the project. The device is easy to operate and convenient for on-site construction, thus ensuring the construction quality of the structural plate.

[0024] 2. The present invention provides a device and construction method for controlling the thickness of structural plates and steel bar protective layers. The prefabricated blocks are connected by bolts, so that the height of the prefabricated blocks after assembly can be easily adjusted. Structural plates of different thicknesses are used in the project, and there is no need to separately manufacture prefabricated blocks according to the structural plates of different thicknesses. The device is suitable for structural plates of various thicknesses and the thickness of the structural plates is guaranteed. Scale marks are set on the bolts to achieve consistent thickness of all combined concrete prefabricated blocks, thereby providing a guarantee for flexible adjustment of the height of the prefabricated blocks.

[0025] 3. The device and construction method for controlling the thickness of the protective layer of the structural plate and the steel bars of the present invention solve the problem of instability of the traditional connection method by connecting the embedded steel bars with the structural plate steel bars. This connection method is more reliable, convenient and easy to operate, thereby ensuring the stability of the position of the prefabricated blocks and the thickness of the protective layer of the structural plate steel bars. Limiting parts and limiting holes are set on the bolts to reduce the safety risks caused by problems in the bolt connection and ensure the safety of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view of a device for controlling the thickness of a protective layer of a structural plate and a steel bar according to an embodiment of the present invention;

[0027] Figure 2 A top view of a device for controlling the thickness of a protective layer of a structural plate and a steel bar according to an embodiment of the present invention;

[0028] Figure 3 A cutaway view of a preferred embodiment of the present invention;

[0029] Figure 4 A side view provided for a preferred embodiment of the present invention;

[0030] Figure 5 A three-dimensional schematic diagram provided for a preferred embodiment of the present invention;

[0031] Figure 6 A front view of a combination provided for a preferred embodiment of the present invention;

[0032] Figure 7 A combined cutaway diagram provided for a preferred embodiment of the present invention;

[0033] Figure 8 A diagram of the placement of combined prefabricated blocks provided in a preferred embodiment of the present invention;

[0034] Fig. 9 A cross-sectional view of the placement position of the combined prefabricated blocks provided in a preferred embodiment of the present invention;

[0035] Fig.10 A bolt assembly diagram provided for a preferred embodiment of the present invention;

[0036] Fig.11A detailed view of the bolts provided for a preferred embodiment of the present invention.

[0037] In all the drawings, the same figure numbers represent the same technical features, specifically: 10-prefabricated block, 11-base, 12-reserved hole, 13-bolt cap, 14-reserved hole for steel bars, 20-embedded steel bars, 30-bolt, 30-A-limiting hole, 30-B-limiting piece, A-structural plate. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Please refer to Figure 1 , Figure 4 and Figure 6 , the present invention relates to a device for controlling the thickness of a structural plate and a steel bar protective layer, comprising a plurality of prefabricated blocks 10, embedded steel bars 20 passing through the interior of the prefabricated blocks 10, and bolts 30 inserted into the prefabricated blocks 10;

[0040] Please refer to Figure 2 , Figure 3 and Figure 5 The prefabricated block 10 is a columnar body, and the prefabricated block 10 includes a bolt cap 13 located at the center of the upper bottom surface of the prefabricated block 10, a reserved hole 12 located directly below the bolt cap 13 and parallel to the axis direction of the prefabricated block 10, and a steel bar reserved hole 14 vertically penetrating the side of the prefabricated block 10 along the axis direction of the prefabricated block 10; wherein the reserved hole 12 is connected to the bolt cap 13 and accommodates the rotational entry of the bolt 30;

[0041] The prefabricated block 10 further includes a base 11, the compressive strength of the material used for the base 11 is not less than the compressive strength of the concrete of the structural plate A. In some preferred embodiments, the strength of the material used for the base 11 is not less than the concrete of the structural plate A, and the strength is not limited to the compressive strength.

[0042] The prefabricated block 10 also includes a sensor 15, which is arranged on the inner wall of the base 11 in the area corresponding to the reserved hole 12. The sensor 15 includes a displacement sensor for estimating the thickness of the structural plate and the steel bar protective layer by measuring the distance that the bolt 30 enters the reserved hole 12, a stress sensor for monitoring the strain caused by the force inside the base 11 and estimating the stress, and a temperature sensor for monitoring the internal temperature of the base 11.

[0043] Please refer to Figure 7 Both ends of the bolt 30 are provided with a threaded area, and the threaded area matches the bolt cap 13. By rotating the two ends of each bolt 30 into the bolt cap 13 of the two prefabricated blocks 10 respectively, and controlling the depth of the bolt 30 entering the reserved hole 12 through the bolt cap 13, the thickness of the structural plate and the steel bar protective layer can be controlled.

[0044] A scale mark is set on the bolt 30, and the overall flatness of the structural plate and the steel bar protective layer is controlled by controlling the scale mark of the bolt 30 corresponding to the bottom of the bolt cap 13 connected to the upper part of the bolt 30 and the scale mark of the bolt 30 corresponding to the top of the bolt cap 13 connected to the lower part of the bolt 30.

[0045] Please refer to Fig.10 and Fig.11 The bolt 30 includes a plurality of limiting holes 30-A and a limiting member 30-B. A plurality of limiting holes 30-A are arranged at set intervals on the bolt 30, and the limiting holes 30-A vertically penetrate the side surface of the bolt 30 along the axial direction of the bolt 30.

[0046] The size of the stopper 30-B matches the stopper hole 30-A. After the bolt cap 13 is positioned on the bolt 30, two stopper holes 30-A closest to the bottom of the bolt cap 13 connected to the upper part of the bolt 30 and the top of the bolt cap 13 connected to the lower part of the bolt 30 are selected and the stopper 30-B is inserted respectively. When the connection between the bolt 30 and the prefabricated block 10 fails, the stopper supports the whole device to improve the safety performance.

[0047] In summary, please refer to Figure 8 and Fig. 9 The thickness of the protective layer of the structural plate and the steel bar is controlled by passing the embedded steel bar 20 through the steel bar reserved hole 14 and fixing the embedded steel bar 20 to the structural plate A, and then adjusting the distance that the bolt 30 enters into the reserved hole 12.

[0048] In some preferred embodiments, a concrete prefabricated block 10 with a diameter of 50 mm and a height of 50 mm is prefabricated in advance, and a HBB400 steel bar with a length of 200 mm and a diameter of 8 mm is embedded in the prefabricated block 10 at a suitable position from the bottom (the thickness of the protective layer of the conventional structural plate is 15 mm, and it is required to facilitate the control of the thickness of the protective layer of the steel bar), that is, the embedded steel bar 20. A reserved hole 12 with a depth of 35 mm and a diameter of 16 mm is reserved in the middle of the upper part of the prefabricated block 10; a bolt cap 13 with a diameter of 14 mm is set on the upper part of the reserved hole 12. After the prefabricated block 10 is prefabricated, the two prefabricated blocks 10 are connected by bolts 30. According to the different thicknesses of the structural plate A, the position of the bolt 30 is adjusted so that the size of the two prefabricated blocks 10 is consistent with the thickness of the structural plate A. After the reinforcement of the structural plate A is tied, the two connected prefabricated blocks 10 are placed in a suitable position (according to the placement method of the pad, the placement spacing is 1000mm×1000mm). Then, the embedded steel bars 20 reserved on the prefabricated block 10 are tied together with the steel bars of the structural plate A. The lower row of steel bars at the lower part of the structural plate A is tied to the upper part of the embedded steel bars 20 of the assembled concrete prefabricated block 10 with a tie wire, thereby ensuring the steel bar protection layer at the lower part of the structural plate; the upper row of steel bars at the upper part of the structural plate A is tied to the lower part of the reserved steel bars 20 of the assembled concrete prefabricated block 10 with a tie wire, thereby ensuring the steel bar protection layer at the upper part of the structural plate A.

[0049] Since the reserved steel bars 20 of the assembled concrete precast block 10 are tied to the steel bars of the structural plate A and the embedded steel bars 20 on the precast block 10 are set in advance, the position of the assembled concrete precast block 10 is guaranteed to be stable and not shifted, and the thickness of the steel bar protective layer at the upper and lower parts of the structural plate A is also guaranteed. The size of the assembled concrete precast block 10 is adjusted to be consistent with the structural plate by bolts 30, and the upper plane of the concrete precast block 10 is used as a reference line for controlling the thickness of the concrete poured on the structural plate, thereby ensuring that the thickness of the structure poured is consistent with the structure.

[0050] In some preferred embodiments, the embedded steel bar 20 is an adjustable length structure, and its length can be adjusted according to actual needs at the construction site through a threaded connection or a telescopic mechanism to adapt to structural plates of different thicknesses. The embedded steel bar 20 is subjected to advanced anti-corrosion treatment, such as hot-dip galvanizing or coating with anti-corrosion paint, to extend the service life and reduce maintenance costs.

[0051] As another aspect of the present invention, it also relates to a construction method of a device for controlling the thickness of a structural plate and a steel bar protective layer, which is implemented by using the above-mentioned device for controlling the thickness of a structural plate and a steel bar protective layer, and comprises the following steps:

[0052] S1, material preparation, preparing the prefabricated block 10, embedded steel bars 20 and bolts 30, and roughening the surface of the prefabricated block 10;

[0053] S2, the device is spliced, and each two of the prefabricated blocks 10 are connected by one of the bolts 30 to form a combined concrete prefabricated block consisting of the two prefabricated blocks 10 and one of the bolts 30. The bolts 30 are rotated so that the bolts 30 are screwed into the reserved holes 12 through the bolt caps 13, and the depth of the bolts 30 entering the reserved holes 12 is adjusted so that the height of the combined concrete prefabricated block is consistent with the thickness of the structural plate A;

[0054] S3, installation, after tying the steel bars of the structural plate A, place the assembled precast concrete block at the set position of the structural plate A, and tie the steel bars of the structural plate A to the embedded steel bars 20 of the assembled precast concrete block with a tie wire; when pouring concrete, use the upper plane of the assembled precast concrete block as the reference line for controlling the thickness of the poured concrete of the structural plate A.

[0055] Specifically, the steps of preparing the prefabricated block 10, the embedded steel bars 20 and the bolts 30 in S1 are:

[0056] S10, determining the materials of the prefabricated blocks 10, the embedded steel bars 20 and the bolts 30 according to the on-site construction requirements, and determining the sizes of the embedded steel bars 20 and the bolts 30;

[0057] S20, according to the size of the embedded steel bar 20, determine the distance and size of the steel bar reserved hole 14 of the prefabricated block 10 and the lower bottom surface, so that the steel bar reserved hole 14 matches the embedded steel bar 20; according to the size of the bolt 30, select the bolt cap 13 and determine the size of the reserved hole 12;

[0058] S30, during the processing of the prefabricated block 10, before the base 11 is air-dried, the bolt cap 13 is placed just above the reserved hole 12, and the embedded steel bar 20 is inserted into the steel bar reserved hole 14, so that the embedded steel bar 20 and the prefabricated block 10 become a whole.

[0059] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for controlling the thickness of the protective layer of a structural plate and a steel bar, characterized in that: It comprises a plurality of prefabricated blocks (10), embedded steel bars (20) passing through the interior of the prefabricated blocks (10), and bolts (30) inserted into the prefabricated blocks (10); The prefabricated block (10) is a columnar body, and comprises a bolt cap (13) located at the center of the upper bottom surface of the prefabricated block (10), a reserved hole (12) located directly below the bolt cap (13) and parallel to the axial direction of the prefabricated block (10), and a steel bar reserved hole (14) vertically penetrating the side surface of the prefabricated block (10) along the axial direction of the prefabricated block (10); wherein the reserved hole (12) is connected to the bolt cap (13) and accommodates the rotational entry of the bolt (30); The thickness of the structural plate and the steel bar protective layer is controlled by passing the embedded steel bar (20) through the steel bar reserved hole (14) and fixing the embedded steel bar (20) to the structural plate (A), and then adjusting the distance that the bolt (30) enters the reserved hole (12).

2. The device for controlling the thickness of the protective layer of the structural plate and the steel bar according to claim 1, characterized in that: The prefabricated block (10) further comprises a base (11), and the compressive strength of the material used for the base (11) is not lower than the compressive strength of the concrete of the structural plate (A).

3. The device for controlling the thickness of the protective layer of the structural plate and the steel bar according to claim 2, characterized in that: The prefabricated block (10) further comprises a sensor (15), wherein the sensor (15) is arranged on the inner wall of the base (11) in the area corresponding to the reserved hole (12), and the sensor (15) comprises a displacement sensor for estimating the thickness of the structural plate and the steel bar protective layer by measuring the distance that the bolt (30) enters the reserved hole (12), a stress sensor for monitoring the strain generated by the force inside the base (11) to estimate the stress, and a temperature sensor for monitoring the temperature inside the base (11).

4. The device for controlling the thickness of the protective layer of the structural plate and the steel bar according to claim 1, characterized in that: Both ends of the bolt (30) are provided with a threaded area, and the threaded area matches the bolt cap (13). By rotating the two ends of each bolt (30) into the bolt caps (13) of the two prefabricated blocks (10), and controlling the depth of the bolt (30) passing through the bolt cap (13) and entering the reserved hole (12), the thickness of the structural plate and the steel bar protective layer can be controlled.

5. The device for controlling the thickness of the protective layer of the structural plate and the steel bar according to claim 1, characterized in that: A scale mark is set on the bolt (30), and the overall flatness of the structural plate and the steel bar protective layer is controlled by controlling the scale mark of the bolt (30) corresponding to the bottom of the bolt cap (13) connected to the upper part of the bolt (30) and the scale mark of the bolt (30) corresponding to the top of the bolt cap (13) connected to the lower part of the bolt (30).

6. The device for controlling the thickness of the protective layer of the structural plate and the steel bar according to claim 1, characterized in that: The bolt (30) comprises a plurality of limiting holes (30-A) and a limiting member (30-B). The plurality of limiting holes (30-A) are arranged at set intervals on the bolt (30), and the limiting holes (30-A) vertically penetrate the side surface of the bolt (30) along the axial direction of the bolt (30).

7. The device for controlling the thickness of the protective layer of the structural plate and the steel bar according to claim 6, characterized in that: The size of the limiting member (30-B) matches the limiting hole (30-A). After the bolt cap (13) is positioned on the bolt (30), two limiting holes (30-A) closest to the bottom of the bolt cap (13) connected to the upper part of the bolt (30) and the top of the bolt cap (13) connected to the lower part of the bolt (30) are selected and the limiting members (30-B) are respectively inserted.

8. A construction method of a device for controlling the thickness of a structural plate and a steel bar protective layer, which is implemented by using the device for controlling the thickness of a structural plate and a steel bar protective layer as claimed in claims 1 to 7, comprising the following steps: S1, material preparation, preparing the prefabricated block (10), embedded steel bars (20) and bolts (30), and roughening the surface of the prefabricated block (10); S2, device splicing, each two of the prefabricated blocks (10) are connected by one of the bolts (30), so as to form a combined concrete prefabricated block consisting of the two prefabricated blocks (10) and one of the bolts (30), and the bolts (30) are rotated so that the bolts (30) are screwed into the reserved holes (12) through the bolt caps (13), and the depth of the bolts (30) entering the reserved holes (12) is adjusted so that the height of the combined concrete prefabricated block is consistent with the thickness of the structural plate (A); S3, installation, after tying the steel bars of the structural plate (A), placing the assembled precast concrete block at a set position of the structural plate (A), tying the steel bars of the structural plate (A) to the embedded steel bars (20) of the assembled precast concrete block with a tie wire; when pouring concrete, using the upper plane of the assembled precast concrete block as a reference line for controlling the thickness of the poured concrete of the structural plate (A).

9. The construction method of the device for controlling the thickness of the protective layer of the structural plate and the steel bar according to claim 8, characterized in that: The steps of preparing the prefabricated block (10), the embedded steel bars (20) and the bolts (30) in S1 are: S10, determining the materials of the prefabricated blocks (10), the embedded steel bars (20) and the bolts (30) according to the on-site construction requirements, and determining the sizes of the embedded steel bars (20) and the bolts (30); S20, according to the size of the embedded steel bar (20), determine the distance and size between the steel bar reserved hole (14) of the prefabricated block (10) and the lower bottom surface, so that the steel bar reserved hole (14) matches the embedded steel bar (20); according to the size of the bolt (30), select the bolt cap (13) and determine the size of the reserved hole (12); S30, during the processing of the prefabricated block (10), before the base (11) is air-dried, the bolt cap (13) is placed just above the reserved hole (12), and the embedded steel bar (20) is inserted into the steel bar reserved hole (14), so that the embedded steel bar (20) and the prefabricated block (10) become a whole.

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