A construction method for a steel plate floor

Abstract

The present invention discloses a construction method for a steel plate floor, comprising: S1: construction of the base layer; S2: binding of steel bars for the post-cast layer; S3: hoisting of the steel plates, hoisting the steel plates and placing them on the top side of the post-cast layer, and a plurality of stud bolts are arranged on the bottom side of the steel plates, a plurality of blanking holes are arranged on the steel plate body, and adjusting jacks for completing the height adjustment of the steel plates and the C15 concrete cushion are arranged at the edges of the blanking holes; S4: adjustment of the elevation and flatness of the steel plates, adjusting the elevation and flatness of each steel plate by means of the adjusting jacks arranged on each steel plate; S5: splicing and edge-locking welding of each steel plate; S6: concrete pouring of the post-cast layer; S7: cutting of the top rods above the steel plates and site cleaning. Through the process setting of the construction method for the steel plate floor of the present invention, each steel plate and the post-cast layer at its bottom side can be integrally and tightly joined, and through the successive pouring of the post-cast layer, the pouring quality of the post-cast layer is ensured, meeting various requirements such as the structural strength and flatness of the steel plate floor.

Description

Technical Field

[0001] The present invention belongs to the technical field of building construction, and particularly relates to a construction method for a steel plate floor. Background Art

[0002] In high-temperature processing workshops, impact workshops, etc., it is more common to lay steel plates on the concrete floor for floor protection. However, due to repeated impacts of heavy objects and the influence of high temperature, the steel plates are prone to deformation, warping, etc., which can easily lead to safety accidents. Summary of the Invention

[0003] The purpose of the present invention is to disclose a construction method for a steel plate floor, which solves the problems that the steel plates of the steel plate floor are prone to deformation and warping. By using the construction method of the steel plate floor of the present invention, these problems can be solved.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A construction method for a steel plate floor, the construction method for the steel plate floor comprising:

[0006] S1: Subgrade construction, backfilling and compacting the foundation in layers, laying a sand and gravel layer on the foundation and compacting it, and pouring a C15 concrete cushion layer on the sand and gravel layer to complete the subgrade construction;

[0007] S2: Binding of the reinforcement for the post-cast layer, carrying out positioning and setting out for the post-cast layer on the C15 concrete cushion layer, and binding the reinforcement;

[0008] S3: Hoisting of the steel plates, hoisting the steel plates and placing them on the top side of the post-cast layer. A number of stud bolts are provided on the bottom side of the steel plates, a number of blanking holes are provided on the steel plate body, and adjusting jacks for adjusting the height between the steel plates and the C15 concrete cushion layer are provided at the edges of the blanking holes;

[0009] S4: Adjusting the elevation and flatness of the steel plates, adjusting the elevation and flatness of each steel plate by means of the adjusting jacks provided on each steel plate;

[0010] S5: Splicing and edge-locking welding of each steel plate, after the flatness of each steel plate is rechecked, carrying out sealing welding and fixing at the splicing joints between the steel plates and at the joints between the steel plates and the edge rails of the floor;

[0011] S6: Pouring of the concrete for the post-cast layer, pouring the concrete for the post-cast layer through the blanking holes on each steel plate;

[0012] S7: Cutting the top rods above the steel plates and cleaning the site.

[0013] According to a preferred embodiment, in step S1, the thickness of each backfill layer of the foundation is less than or equal to 300 mm, and the compaction coefficient is greater than 0.94; the thickness of the sand and gravel layer is 500 - 700 mm, and the compaction coefficient is greater than 0.94; the thickness of the concrete cushion is 80 - 120 mm.

[0014] According to a preferred embodiment, the longitudinal and transverse spacing of each stud provided on the lower side of the steel plate is set at 150 mm.

[0015] According to a preferred embodiment, the stud is fixedly connected to the steel plate by welding.

[0016] According to a preferred embodiment, there are 4 blanking holes arranged in a rectangular pattern on each steel plate, and the size of each blanking hole is 120 * 120 mm.

[0017] According to a preferred embodiment, there are also exhaust holes on each steel plate, and the exhaust holes are located at the intersection of the diagonals of the four blanking holes.

[0018] According to a preferred embodiment, in step S4, the flatness of each steel plate after adjustment is not greater than the accuracy of 5 mm.

[0019] According to a preferred embodiment, in step S5, a 2 - mm expansion joint is reserved at the joint of each steel plate. During the welding process, stress is eliminated by the hammering method every time a preset length is welded.

[0020] According to a preferred embodiment, in step S6, the concrete pouring process of the post - casting layer specifically includes:

[0021] During the concrete pouring process, it is carried out step by step from the edge steel plate to the steel plate in the preset direction;

[0022] When the slurry and stones overflow from the exhaust hole and the next row of blanking holes, an insertion - type vibrator is used for vibration at the position of the blanking hole. Through vibration, the gas in the concrete is released, so that the self - compacting concrete can be fully filled under the steel plate. When no more bubbles are generated at the position of the exhaust hole and the concrete surface no longer drops, the vibration stops;

[0023] When the pouring of the second row of blanking holes is completed using the same pouring method, the blanking opening of the first row is replenished and secondary pouring is carried out, and a vibrator is inserted for vibration until no more bubbles are generated at the exhaust hole and slurry continuously overflows before the secondary replenishment pouring can be stopped;

[0024] Finally, continuous pouring is carried out step by step in the same pouring method.

[0025] According to a preferred embodiment, step S7 includes, after the concrete pouring is completed, cutting the adjusting jack rods left on the steel plate surface for adjusting the elevation and flatness of the steel plate, and making the cutting surface flush with the steel plate surface.

[0026] The main solution of the present invention and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed by the present invention. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of the present invention, and all of them are the technical solutions to be protected by the present invention, and will not be enumerated here.

[0027] Beneficial effects of the present invention: Through the process setting of the steel plate floor construction method of the present invention, each steel plate and the post-cast layer on its bottom side can be integrally and tightly joined, and through the successive pouring of the post-cast layer, the pouring quality of the post-cast layer is ensured, meeting various requirements such as the structural strength and flatness of the steel plate floor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic flow chart of the steel plate floor construction method of the present invention;

[0029] Figure 2 is a schematic structural diagram of the stud settings on each steel plate of the steel plate floor of the present invention;

[0030] Figure 3 is a schematic structural diagram of the cutting holes and exhaust holes on each steel plate of the steel plate floor of the present invention;

[0031] Figure 4 is a schematic structural diagram of the adjusting jack rods on each steel plate of the steel plate floor of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following uses specific specific examples to illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0033] Example 1:

[0034] Referring to Figures 1 to 4 as shown, this embodiment discloses a steel plate floor construction method, and the steel plate floor construction method includes the following steps.

[0035] Step S1: Subgrade construction, backfilling and compacting the foundation in layers, laying a sand and gravel layer on the foundation and compacting it, and pouring a C15 concrete cushion layer on the sand and gravel layer to complete the subgrade construction.

[0036] Specifically, the steel plate floor has high requirements for the base layer. Therefore, strict control is needed for the construction of the base layer before the upper steel plate floor is constructed.

[0037] The foundation needs to be backfilled and compacted in layers, with the thickness of each layer not exceeding 300 mm, and the compaction coefficient must be greater than 0.94. After the foundation backfill meets the requirements, a layer of natural sand and gravel with a thickness of 600 is required to be laid on its upper part, and the compaction coefficient must be greater than 0.94. After the compaction coefficients of the two layers of backfill materials meet the requirements, a 100-thick C15 concrete cushion is poured on its upper part.

[0038] Since the jacks of the steel plate in the later stage are both the adjusting screws for the elevation flatness of the steel plate and the supporting rods for the weight of the steel plate, which are located on the cushion, the cushion needs to be strengthened in maintenance to avoid cracks and other phenomena and ensure the strength.

[0039] Step S2: Binding of the steel bars for the post-cast layer. Positioning and setting out the post-cast layer on the C15 concrete cushion, and then binding the steel bars.

[0040] Specifically, position and set out the steel bars. The control lines and reference points need to be consistent with the control lines for the later installation of the steel plate. During the process of installing the steel bars, strictly control the thickness of the steel bar protection layer.

[0041] This process requires pouring concrete after the steel plate is installed. Therefore, the concrete is post-poured. Thus, the elevation of the steel bar installation and the setting of the protection layer have a certain impact on the subsequent installation of the steel plate and the pouring quality of the concrete.

[0042] Step S3: Hoisting the steel plate. Hoist the steel plate and place it on the top side of the post-cast layer. A number of stud bolts are provided on the bottom side of the steel plate body. A number of blanking holes are provided on the steel plate body, and adjusting jacks for adjusting the height between the steel plate and the C15 concrete cushion are provided at the edges of the blanking holes. Refer to Figure 4 as shown.

[0043] Specifically, refer to Figure 2 as shown. To enable the steel plate to be closely combined with the concrete to form an overall stress-bearing effect, stud bolts are welded at the contact surface between the lower part of the steel plate and the concrete, and the longitudinal and transverse spacings are set at 150 mm.

[0044] Refer to Figure 3 as shown. Blanking holes are provided on the steel plate at certain intervals. Adjusting jacks are welded at the edges of the holes. After the bolts are screwed in, the screw rods support the load of the steel plate. By rotating the bolts inserted into the steel plate up and down, the steel plate can be driven to move up and down to achieve the purpose of adjusting the elevation of the steel plate, so as to adjust the flatness of the entire steel plate floor. To ensure the dense pouring of the concrete, exhaust holes are opened at the intersection positions of the four blanking holes.

[0045] Special slings should be used when transporting steel plates to ensure that the steel plates as a whole do not deform, and cranes should be used to assist in the installation of steel floor plates.

[0046] Step S4: adjusting the elevation and flatness of the steel plates, by setting an adjusting push rod on each steel plate to adjust the elevation and flatness of each steel plate.

[0047] Specifically, after the floor steel plate is hoisted in place, the overall elevation and flatness of the steel plate need to be adjusted, and the flatness of the steel plate is required to be no more than 5mm. The elevation and flatness of the steel plate are controlled by adjusting the top rod up and down.

[0048] Step S5: The steel plates are spliced ​​and edge-locked. After the flatness of the steel plates is checked, edge-locking welding is performed at the joints between the steel plates and at the junctions between the steel plates and the edge rails of the floor.

[0049] After the flatness check is completed, the joints between the steel plates and the intersections between the steel plates and the rails are welded and fixed. In order to prevent the steel plates from bulging and deforming due to thermal expansion and contraction, a 2mm expansion joint should be reserved at the joints of each steel plate. During the welding process, the stress is eliminated by hammering for each welding section. The hammering method should not be too strong to damage the steel plates and welds, and the overall flatness of the steel plates should be ensured.

[0050] Step S6: Concrete pouring of the post-casting layer is completed through the discharge holes on the steel plate.

[0051] Specifically, this step is to pour concrete for the post-casting layer. After the concrete is poured, the position of the steel plate cannot be adjusted. Therefore, before pouring concrete, the position, elevation, flatness, and seam welding quality of the steel plate must be re-inspected to ensure that they meet the requirements before proceeding to the next process.

[0052] After the elevation and flatness are measured correctly, self-compacting concrete is used for pouring. Concrete is poured from the feeding holes of the steel plate. The concrete feeding should be gradually pushed forward along one side and poured continuously. At the same time, it should be noted that the pouring speed should not be too fast, so that the self-compacting concrete can fully flow and fill under the steel plate under its own weight.

[0053] When concrete overflows from the vent hole and the next row of discharge holes, the inserted vibrator is used for vibration at the discharge hole. The vibration should be inserted quickly and pulled out slowly. The gas in the concrete is released by vibration, so that the self-compacting concrete can be fully filled under the steel plate. When there are no more bubbles at the vent hole and the concrete surface is no longer falling, the vibration can be stopped.

[0054] When the second row of discharge holes is poured using the same pouring method, the first row of discharge holes is filled with material for a second pouring, and a vibrating rod is inserted for vibration until no more bubbles are generated in the exhaust holes and slurry is continuously overflowing. Then the second filling pouring can be stopped. Finally, the same pouring method is used for step-by-step continuous pouring.

[0055] While pouring concrete, the steel plate elevation and flatness should be remeasured in real time to monitor whether the steel plate is floating during the concrete pouring process. If the steel plate elevation and flatness exceed the control range during the concrete pouring process, local adjustments should be made in time.

[0056] Step S7: Cut the top rod on the steel plate and clean up the site.

[0057] Specifically, after the concrete pouring is completed, the top rods left on the upper part of the floor steel plate for adjusting the elevation and flatness of the steel plate are cut, and the cut surface is flush with the steel plate surface. At the same time, the mortar left on the upper part of the floor steel plate is cleaned.

[0058] Through the process setting of the steel plate floor construction method of the present invention, each steel plate and the post-cast layer on its bottom side can be completely and tightly connected, and through the successive casting of the post-cast layer, the casting quality of the post-cast layer is guaranteed, and various requirements such as structural strength and flatness of the steel plate floor are met.

[0059] 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 construction method for a steel plate floor, characterized in that, the construction method for the steel plate floor includes: S1: Subgrade construction, backfill and compact the foundation in layers, lay a sand and gravel layer on the foundation and compact it, and pour a C15 concrete cushion on the sand and gravel layer to complete the subgrade construction; S2: Binding of reinforcement for the post-cast layer, carry out positioning and setting out for the post-cast layer on the C15 concrete cushion, and bind the reinforcement; S3: Hoisting of steel plates, hoist the steel plates and place them on the top side of the post-cast layer, and a number of stud bolts are provided on the bottom side of the steel plates. A number of blanking holes are provided on the steel plate body, and adjusting jacks for adjusting the height between the steel plate and the C15 concrete cushion are provided at the edges of the blanking holes; S4: Adjustment of the elevation and flatness of the steel plates, complete the adjustment of the elevation and flatness of each steel plate by means of the adjusting jacks provided on each steel plate; S5: Splicing and edge-locking welding of each steel plate, after the flatness of each steel plate is rechecked, at the splicing joints between the steel plates and at the joints between the steel plates and the edge rails of the floor, carry out edge-sealing welding and fixing; S6: Pouring of concrete for the post-cast layer, complete the pouring of concrete for the post-cast layer through each blanking hole on the steel plate; S7: Cutting of the adjusting jacks on the upper part of the steel plates, site cleaning; In step S1, the thickness of each backfill layer of the foundation is less than or equal to 300 mm, and the compaction coefficient is greater than 0.94; and the thickness of the sand and gravel layer is 500 - 700 mm, and the compaction coefficient is greater than 0.94; the thickness of the concrete cushion is 80 - 120 mm; The longitudinal and transverse spacing of each stud bolt provided on the lower side of the steel plate is set according to 150 mm; The stud bolts are fixedly connected to the steel plate by welding; Each steel plate is provided with 4 blanking holes arranged in a rectangular pattern, and the size of each blanking hole is 120 * 120 mm; Each steel plate is also provided with exhaust holes, and the exhaust holes are located at the intersection of the diagonals of the four blanking holes; In step S4, the flatness of each steel plate after adjustment is not greater than the accuracy of 5 mm; In step S5, a 2 mm expansion joint is reserved at the splicing joints of each steel plate. During the welding process, for every preset welding length, the stress is eliminated by the hammering method; Step S6, the concrete pouring process for the post-cast layer specifically includes: During the concrete pouring process, it is carried out step by step from the edge steel plates to the steel plates in the preset direction; When the slurry and stones overflow from the exhaust holes and the next row of blanking holes during the concrete pouring, insert a plug-type vibrator for vibration at the blanking hole position. Through vibration, the gas in the concrete is released, so that the self-compacting concrete can be fully filled under the steel plate. When no bubbles are generated at the exhaust hole position and the concrete surface no longer drops, stop the vibration; When the second row of blanking holes is poured and completed by using the same pouring method, replenish the material and carry out secondary pouring at the blanking openings of the first row, and insert a vibrator for vibration until no bubbles are generated at the exhaust holes and the slurry continuously overflows before stopping the secondary replenishment pouring; Finally, continue the progressive continuous pouring in the same pouring method.

2. The construction method for a steel plate floor according to claim 1, characterized in that, step S7 includes, after the concrete pouring is completed, cutting the adjusting jacks left on the steel plate surface for adjusting the elevation and flatness of the steel plate, and the cutting surface is flush with the steel plate surface.

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