Steel bar truss floor support plate concrete pouring elevation adjustable device and construction method

Abstract

The invention provides a steel bar truss floor support plate concrete pouring elevation adjustable device and a construction method, and relates to the technical field of building floor slab concrete elevation control. The device comprises a vertical supporting rod, a setting elevation positioning piece and a locking piece; the elevation level indicating piece is welded and fixed at the top of the vertical supporting rod; the adjusting assembly is connected with the vertical supporting rod, the two sets of elevation positioning pieces and the locking pieces are located on the upper side and the lower side of the adjusting assembly respectively, adjustable fixing structures are arranged at the two ends of the adjusting assembly respectively, and the fixing structures can abut against upper chord bars of the adjacent steel bar trusses; the supporting structures are two sets of inclined supports which are welded to the two sides of the elevation positioning piece correspondingly after paying off along the steel bar truss. According to the method, the device for adjusting the concrete pouring elevation of the steel bar truss floor support plate is adopted, the control precision of the concrete pouring elevation of the steel bar truss floor support plate is effectively improved, and the situation that the steel bar truss floor support plate is stressed to bend downwards and deform easily due to over-high accumulation of local concrete and concentrated load is avoided.

Description

Technical Field

[0001] This invention relates to the field of concrete elevation control technology for building floor slabs, and in particular to an adjustable device and construction method for concrete pouring of steel truss floor slabs. Background Technology

[0002] In prefabricated building construction, after the precast steel truss floor slabs are installed, large-area cast-in-place concrete construction is required to form an integral floor slab. Traditional methods for controlling the concrete pouring elevation of floor slabs often involve welding the steel reinforcement elevation points. This method suffers from low efficiency in welding the steel reinforcement elevation points, susceptibility to construction disturbances during concrete pouring leading to elevation benchmark shifts, poor flexibility in elevation adjustment, and inability to adapt to different slab thickness requirements.

[0003] Insufficient precision in controlling floor slab elevation can easily lead to uneven concrete pouring and poor appearance quality. At the same time, excessive local concrete accumulation can cause load concentration, resulting in bending deformation of the steel truss floor slab under stress. This requires additional personnel to chisel and repair later, which not only increases rework costs but also seriously affects the construction progress.

[0004] Therefore, there is an urgent need for an adjustable concrete pouring elevation device and construction method for reinforced truss floor slabs to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustable elevation device and construction method for concrete pouring of reinforced truss floor slabs, to solve the technical problems in the prior art, such as low efficiency of welding operations at the reinforcement elevation points, susceptibility to construction disturbances during concrete pouring leading to elevation benchmark shifts, poor flexibility in elevation adjustment, and inability to adapt to different slab thickness requirements. The various technical effects of the preferred technical solutions provided by this invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The present invention provides an adjustable concrete pouring elevation device for reinforced truss floor slabs, comprising:

[0008] Vertical support rods are equipped with elevation positioning and locking devices;

[0009] The elevation level indicator is welded and fixed to the top of the vertical support rod;

[0010] An adjustment assembly is connected to the vertical support rod. Two sets of elevation positioning components and the locking components are located on the upper and lower sides of the adjustment assembly, respectively. Adjustable fixing structures are provided at both ends of the adjustment assembly. The fixing structures can abut against the upper chord of the adjacent steel truss.

[0011] The supporting structure consists of two sets of diagonal supports welded to both sides of the elevation positioning component after the steel truss is laid out.

[0012] Preferably, the elevation level indicator is a horizontal bar made of steel bars, and both ends of the horizontal bar are provided with red and white warning strips.

[0013] Preferably, the vertical support rod includes a threaded structure, and the elevation positioning component and the locking component are reverse nuts that can be connected to the threaded structure.

[0014] Preferably, the adjusting assembly includes an adjusting nut and steel bars of equal length symmetrically welded to both sides of the adjusting nut, the ends of which are provided with threaded structures.

[0015] Preferably, the fixing structure includes a nut, and the nut is provided with a limiting structure protruding from the nut to abut against the adjacent upper chord of the steel truss.

[0016] Preferably, the fixing structure is a dovetail nut.

[0017] Preferably, the diagonal brace is made of steel bars, and the diagonal brace, together with the elevation positioning component and the steel truss, forms a triangular structure.

[0018] Preferably, the vertical support rod is a construction waste screw rod, and the adjusting nut, the elevation positioning component, the locking component and the reinforcing bar are all made from construction waste materials.

[0019] A method for constructing the concrete pouring elevation of a reinforced truss floor slab includes the following steps:

[0020] S1: The adjustable concrete pouring elevation device for steel truss floor slabs as described in any of claims 1-8 is made using construction waste materials.

[0021] S2: After the precast steel truss floor deck is installed, the elevation control points are determined by measurement and positioning, and corresponding control point markers are placed on the floor deck.

[0022] S3: Install the elevation control device and fasten the fixing structure in the adjustment assembly to the upper chord of the steel truss for device fixation;

[0023] S4: Use a level to measure the height of the elevation indicator, adjust the vertical support rod to adjust the elevation indicator to the design elevation, and lock it with the locking device;

[0024] S5: When pouring concrete, use the upper surface of the elevation level indicator as a reference, use a screed to level the concrete, fill in any local depressions with material and then level it a second time to ensure that the concrete surface is flush with the elevation level indicator.

[0025] S6: Before the concrete of the floor slab sets, pull out the vertical support rods and components of the device, fill the reserved holes with mortar of the same mix ratio, clean the device and recycle it for later use.

[0026] Preferably, when processing the adjustable concrete pouring elevation device for the steel truss floor slab, it is necessary to ensure that the lengths of the two steel bars in the adjustment component are consistent, and that the ends of the steel bars are rolled into threads by a thread rolling machine, and the thread length is compatible with the fixed structure.

[0027] The present invention provides an adjustable elevation device and construction method for concrete pouring of steel truss floor slabs. By welding a fixed elevation level indicator to the top of a vertical support rod, and by equipping the vertical support rod with elevation positioning and locking components located on the upper and lower sides of the adjustment assembly, precise vertical locking can be achieved. Adjustable fixing structures are set at both ends of the adjustment assembly, which can abut against the upper chord of adjacent steel trusses. The adjustable fixing structure eliminates the need for on-site welding; the abutment and limiting of the device can be achieved simply by adjustment. Disassembly does not require damage to the device or steel truss, facilitating subsequent recycling and reuse. Furthermore, the symmetrical structure of the adjustment assembly, with the fixing structure 4 evenly abutting against the upper chord of the steel truss, avoids deformation of the floor slab caused by localized stress concentration. This solves the problems of localized high-temperature damage to the steel bars during traditional elevation point welding and the tendency for single-point stress to cause the floor slab to bend downwards. Moreover, the symmetrical support formed by two sets of diagonal braces prevents the device from tilting or shifting during concrete pouring and screeding operations. With the cooperation of elevation level indicators, vertical support rods, adjustment components and support structures, it can be flexibly adapted to the construction of steel truss floor decks of different thicknesses and specifications, making it highly versatile and practical. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of an embodiment of the adjustable concrete pouring elevation device for steel truss floor slabs of the present invention.

[0030] Figure 2 yes Figure 1 A top-view structural diagram.

[0031] In the diagram: 1. Elevation level indicator; 2. Vertical support rod; 3. Adjustment component; 4. Fixing structure; 51. Elevation positioning component; 52. Locking component; 6. Support structure; 7. Upper chord of steel truss; 8. Precast steel truss. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0033] like Figure 1 and Figure 2 As shown, the present invention provides an adjustable elevation device for concrete pouring of steel truss floor slabs, including an elevation level indicator 1, a vertical support rod 2, an adjustment component 3, and a support structure 6.

[0034] The vertical support rod 2 is equipped with an elevation positioning component 51 and a locking component 52. The elevation level indicator 1 is welded and fixed to the top of the vertical support rod 2.

[0035] In this embodiment, the vertical support rod 2 is a construction waste screw rod. The elevation positioning part 51 and the locking part 52 are reverse nuts that can be connected to the threaded structure. The elevation positioning part 51 is located at the top, i.e., the upper nut, which can connect to the screw rod and fix the screw rod elevation. The lower nut, i.e., the locking part 52, is used to lock the screw rod to prevent loosening. In use, the elevation positioning part 51 and the locking part 52 are engaged in reverse, and the opposite thread direction is used to offset the risk of loosening caused by concrete pouring vibration and temperature changes, thus solving the problem of easy loosening of traditional single nuts.

[0036] The adjustment component 3 is connected to the vertical support rod 2. The elevation positioning component 51 and the locking component 52 are located on the upper and lower sides of the adjustment component 3, respectively. Adjustable fixing structures 4 are provided at both ends of the adjustment component 3. The fixing structures can abut against the upper chord bar 7 of the adjacent steel truss.

[0037] The support structure 6 consists of two sets of diagonal supports welded to both sides of the elevation positioning component 51 after the steel truss is laid out.

[0038] In this embodiment, the two sets of diagonal braces are symmetrically arranged along the center of the elevation positioning component 51, thereby forming a bidirectional stable support and protection to prevent disturbance during concrete pouring. During use, regardless of the direction from which concrete impacts the device, the force can be quickly dispersed through the support structure 6, ensuring that the device always remains vertical and the elevation reference remains unchanged.

[0039] This adjustable concrete pouring elevation device for steel truss floor slabs utilizes a vertical support rod 2 with a welded and fixed elevation level indicator 1 at the top. The vertical support rod 2 is equipped with an elevation positioning component 51 and a locking component 52, located on the upper and lower sides of the adjustment assembly 3 respectively, enabling precise vertical locking. Adjustable fixing structures 4 are located at both ends of the adjustment assembly 3, abutting against the adjacent upper chord reinforcement 7 of the steel truss. The adjustable fixing structures eliminate the need for on-site welding; the device's contact and positioning are achieved simply through adjustment. Disassembly does not damage the device or the steel truss, facilitating subsequent recycling and reuse. Furthermore, the symmetrical structure of the adjustment assembly 3, with the fixing structures 4 evenly contacting the upper chord reinforcement 7, prevents floor slab deformation caused by localized stress concentration. This solves the problems of localized high-temperature damage to the reinforcement and downward bending of the floor slab due to single-point stress during traditional elevation point welding. Additionally, the symmetrical support formed by two sets of diagonal braces prevents the device from tilting or shifting during concrete pouring and screeding operations. With the cooperation of the elevation level indicator 1, vertical support rod 2, adjustment component 3 and support structure 6, it can flexibly adapt to the construction of steel truss floor decks of different thicknesses and specifications, with strong versatility and better practicality.

[0040] As an optional implementation, the elevation level indicator 1 is made of a horizontal bar with steel bars, and red and white warning strips are set at both ends of the horizontal bar.

[0041] In this embodiment, the elevation level indicator 1 is welded and fixed to the top of the vertical support rod 2 using short steel bars of appropriate size. The red and white warning strips at both ends of the crossbar are preferably painted with warning paint, which improves visibility and facilitates manufacturing.

[0042] As an optional implementation, the adjusting component 3 includes an adjusting nut and steel bars of equal length symmetrically welded to both sides of the adjusting nut, with threaded structures at the ends of the steel bars.

[0043] During processing, two short steel bars of equal length are symmetrically welded and fixed on both sides of the adjusting nut. Then, threads are rolled at the ends of the steel bars using a thread rolling machine to facilitate connection with the fixing structure 4. By symmetrically welding equal-length steel bars on both sides of the adjusting nut, the consistency of the left and right forces during fixing can be ensured, preventing the device from tipping over due to force offset, and ensuring the verticality and horizontality of the elevation benchmark.

[0044] Preferably, the adjusting nut, elevation positioning component 51, locking component 52 and reinforcing bar in this embodiment are all made from leftover materials from construction sites, so that the leftover materials can be recycled and reused, reducing waste, saving resources and protecting the environment.

[0045] As an optional implementation, the fixing structure 4 includes a nut, and a limiting structure protruding from the nut is provided on the nut to abut against the adjacent upper chord of the steel truss, thereby increasing the effectiveness of the elevation control and adjustment device. In this embodiment, the fixing structure 4 uses a dovetail nut. The clamping distance can be adjusted by rotating the dovetail nut, without the need for professional tools. Construction personnel only need to operate manually to complete the fixing, and a single person can install it independently, reducing labor costs.

[0046] As an optional implementation, the diagonal bracing is made of steel bars, and the diagonal bracing, together with the elevation positioning component 51 and the steel truss, forms a triangular structure. By setting the diagonal bracing, elevation positioning component 51, and steel truss to form a triangular structure, the stability of the triangular structure is utilized to disperse the lateral impact force during concrete pouring and the horizontal force of the screed to the steel truss, thereby improving the overall anti-overturning capacity of the device.

[0047] Optionally, the diagonal brace in this embodiment is made of steel reinforcement. Preferably, the steel reinforcement of the diagonal brace is the same as that of the steel truss and the adjustment component, which has a high degree of mechanical performance matching and good welding compatibility, avoiding problems such as welding cracking or uneven stress caused by material differences.

[0048] This embodiment also provides a method for constructing the concrete pouring elevation of a reinforced truss floor slab, including the following steps:

[0049] S1: The above-mentioned adjustable device for concrete pouring elevation of steel truss floor slab is made using construction surplus materials.

[0050] S2: After the precast steel truss floor deck is installed, the elevation control points are determined by measurement and positioning, and corresponding control point markers are placed on the floor deck.

[0051] During construction, after measurement and positioning, elevation control points are set on the floor deck according to the actual situation.

[0052] S3: Install the elevation control device and fasten the fixing structure 4 in the adjustment component 3 to the upper chord of the steel truss for device fixation.

[0053] S4: Use a level to measure the height of the elevation indicator 1, adjust the vertical support rod 2 to adjust the elevation indicator 1 to the design elevation, and lock it with the locking piece 52.

[0054] S5: When pouring concrete, use the upper surface of the elevation level indicator 1 as a reference, use a screed to level the concrete, and fill any local depressions with material before leveling it a second time to ensure that the concrete surface is flush with the elevation level indicator.

[0055] S6: Before the concrete of the floor slab sets, pull out the vertical support rods and components of the device, fill the reserved holes with mortar of the same mix ratio, clean the device and recycle it for later use.

[0056] The adjustable concrete pouring elevation device for the steel truss floor slab in this embodiment uses leftover construction materials such as screws, nuts, and short steel bars, which facilitates the recycling of leftover materials, reduces waste, and is simple to process and easy to use. Preferably, when processing the adjustable concrete pouring elevation device for the steel truss floor slab, it is necessary to ensure that the two steel bars in the adjusting component 3 are of the same length, and that the ends of the steel bars are rolled into threads by a thread rolling machine, with the thread length being compatible with the fixed structure 4.

[0057] This method for constructing concrete pouring elevation for reinforced truss floor slabs utilizes an adjustable elevation device. Its simple structure and convenient construction, combined with the level indicator 1, vertical support rod 2, adjustment component 3, and support structure 6, effectively improve the accuracy of concrete pouring elevation control, reducing unevenness and poor appearance of the poured concrete. It also avoids issues such as excessive local concrete accumulation leading to load concentration and subsequent bending deformation of the reinforced truss floor slab. Furthermore, it significantly improves construction efficiency, reduces rework costs, and is adaptable to different thicknesses and specifications of reinforced truss floor slabs, offering strong versatility and improved practicality.

[0058] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An adjustable device for concrete pouring elevation of steel truss floor slabs, characterized in that, include: Vertical support rods are equipped with elevation positioning and locking devices; The elevation level indicator is welded and fixed to the top of the vertical support rod; An adjustment assembly is connected to the vertical support rod. Two sets of elevation positioning components and the locking components are located on the upper and lower sides of the adjustment assembly, respectively. Adjustable fixing structures are provided at both ends of the adjustment assembly. The fixing structures can abut against the upper chord of the adjacent steel truss. The supporting structure consists of two sets of diagonal supports welded to both sides of the elevation positioning component after the steel truss is laid out.

2. The adjustable concrete pouring elevation device for steel truss floor slabs according to claim 1, characterized in that: The elevation level indicator is a horizontal bar made of steel bars, with red and white warning strips at both ends of the horizontal bar.

3. The adjustable concrete pouring elevation device for reinforced truss floor slabs according to claim 2, characterized in that: The vertical support rod includes a threaded structure, and the elevation positioning component and the locking component are reverse nuts that can be connected to the threaded structure.

4. The adjustable concrete pouring elevation device for steel truss floor slabs according to claim 3, characterized in that: The adjustment assembly includes an adjustment nut and steel bars of equal length symmetrically welded to both sides of the adjustment nut, with threaded structures at the ends of the steel bars.

5. The adjustable concrete pouring elevation device for steel truss floor slabs according to claim 4, characterized in that: The fixing structure includes a nut, and the nut is provided with a limiting structure protruding from the nut to abut against the adjacent upper chord of the steel truss.

6. The adjustable concrete pouring elevation device for reinforced truss floor slabs according to claim 4, characterized in that: The fixing structure uses a dovetail nut.

7. The adjustable concrete pouring elevation device for steel truss floor slabs according to claim 4, characterized in that: The diagonal brace is made of steel bars, and the diagonal brace, together with the elevation positioning component and the steel truss, forms a triangular structure.

8. The adjustable concrete pouring elevation device for steel truss floor slabs according to claim 7, characterized in that: The vertical support rod is made from leftover construction materials, and the adjusting nut, the elevation positioning component, the locking component, and the reinforcing bar are all made from leftover construction materials.

9. A method for constructing the concrete pouring elevation of a reinforced truss floor slab, characterized in that, Includes the following steps: S1: The adjustable concrete pouring elevation device for steel truss floor slabs as described in any of claims 1-8 is made using construction waste materials. S2: After the precast steel truss floor deck is installed, the elevation control points are determined by measurement and positioning, and corresponding control point markers are placed on the floor deck. S3: Install the elevation control device and fasten the fixing structure in the adjustment assembly to the upper chord of the steel truss for device fixation; S4: Use a level to measure the height of the elevation indicator, adjust the vertical support rod to adjust the elevation indicator to the design elevation, and lock it with the locking device; S5: When pouring concrete, use the upper surface of the elevation level indicator as a reference, use a screed to level the concrete, fill in any local depressions with material and then level it a second time to ensure that the concrete surface is flush with the elevation level indicator. S6: Before the concrete of the floor slab sets, pull out the vertical support rods and components of the device, fill the reserved holes with mortar of the same mix ratio, clean the device and recycle it for later use.

10. The method for constructing the concrete pouring elevation of the reinforced truss floor slab according to claim 9, characterized in that: When processing the adjustable concrete pouring elevation device for the steel truss floor slab, it is necessary to ensure that the lengths of the two steel bars in the adjustment component are consistent, and that the ends of the steel bars are rolled into threads by a thread rolling machine, and that the thread length is compatible with the fixed structure.

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