Reinforcing method of concrete floor

Abstract

The invention discloses a concrete floor reinforcing method which comprises the following steps that the bottom of a target concrete floor is treated to expose the concrete surface, and chiseling treatment is carried out; anchor bars are implanted into the bottom of the target concrete floor; bottom bars are implanted into the original structural beams on the periphery of the target concrete floor slab; binding and fixing the bottom bars on the anchor bars; preparing a template system and determining the position of a lifting point; according to the determined lifting point position, a grouting hole is formed in the target concrete floor; a grout overflow hole is formed in the target concrete floor; a hanging system is installed, a hanging rope penetrates through the grouting hole, and the formwork system is lifted to a preset position; related gaps are subjected to sealing treatment; grouting materials are poured through the grouting holes to form a concrete laminated layer; after the strength of the concrete overlapping layer meets the requirement, the formwork system is dismantled; wherein the auxiliary bearing structure is used for assisting the target concrete floor to bear dead load and live load in the construction process. The method is beneficial for reducing potential safety hazards in the construction process.

Description

Technical Field

[0001] The present application relates to the technical field of building construction, and in particular to a method for reinforcing a concrete floor slab. Background Art

[0002] The revitalization and utilization of modern and contemporary cultural heritage buildings usually requires changing the use function of the local space of the cultural heritage buildings, which usually adds additional use loads. Therefore, it is usually necessary to conduct special safety inspections and appraisals on the original concrete floor slabs of the cultural heritage buildings and carry out structural reinforcement to make them comply with structural specifications and the safety, durability and applicability required for use.

[0003] Among them, when the newly added service load is large, the traditional reinforcement method of pasting carbon fiber cloth at the bottom of the original concrete floor slab can no longer meet the actual reinforcement needs. In addition, based on the protection elements and protection principles of the renovation of cultural relics, the method of knocking out the original concrete floor slab and redoing it cannot be adopted. The original concrete floor slab cannot be destroyed, and the bearing capacity of the floor slab structure needs to be better improved. For this reason, the relevant technology proposes a reinforcement method of increasing the cross-section of the floor slab structure. Specifically, in the relevant technology, a concrete overlay layer is poured at the bottom of the original concrete floor slab to improve the bearing capacity of the floor slab structure. However, during the construction process, the original concrete floor slab needs to bear the construction personnel, the formwork system required for pouring the concrete overlay layer, the uncured grouting material to form the concrete overlay layer, and the dead load and live load brought by the construction tools, resulting in the original concrete floor slab being damaged due to insufficient bearing capacity during the construction process. Based on this, there are certain safety hazards in the construction process. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a method for reinforcing a concrete floor slab, which is conducive to reducing the risk of the target concrete floor slab being damaged due to insufficient bearing capacity during construction, thereby helping to reduce safety hazards during construction.

[0005] The method for reinforcing a concrete floor slab according to an embodiment of the present application comprises the following steps:

[0006] Treating the bottom of the target concrete floor slab to expose the concrete surface, and roughening the exposed concrete surface;

[0007] Anchor bars are implanted at the bottom of the target concrete slab;

[0008] Implant bottom reinforcement into the original structural beams around the target concrete slab;

[0009] Tie and fix the bottom reinforcement to the anchor reinforcement;

[0010] Prepare the formwork system and determine the position of the lifting points of the formwork system;

[0011] According to the determined hanging point position, grouting holes are opened on the target concrete floor slab;

[0012] Opening overflow holes on the target concrete floor;

[0013] Install the hanging system, pass the hanging rope of the hanging system through the grouting holes and lift the formwork system to the preset position;

[0014] Seal the relevant gaps;

[0015] pouring grouting material through the grouting holes to form a concrete overlay layer;

[0016] The formwork system is removed after the strength of the concrete superimposed layer reaches the requirement;

[0017] Among them, auxiliary load-bearing structures are used to assist the target concrete floor slab in bearing the dead load and live load during the construction process.

[0018] The reinforcement method of the concrete floor according to the embodiment of the present application has at least the following beneficial effects: during construction, a concrete superposition layer is poured at the bottom of the target concrete floor to improve the bearing capacity of the floor structure. Among them, the auxiliary load-bearing structure is used to assist the target concrete floor to bear the dead load and live load during the construction process, which is conducive to reducing the risk of the target concrete floor being damaged due to insufficient bearing capacity during the construction process, thereby helping to reduce safety hazards during the construction process.

[0019] According to some embodiments of the present application, the implantation depth of the bottom reinforcement is greater than the implantation depth of the anchor reinforcement.

[0020] According to some embodiments of the present application, the upper concrete floor slab of the target concrete floor slab is used as an auxiliary load-bearing structure, and cooperates with the hanging system to assist the target concrete floor slab in bearing the dead load and live load during the construction process.

[0021] According to some embodiments of the present application, the hanging system also includes an electric hoist, one end of the hanging rope is connected to the formwork system, and the other end of the hanging rope is connected to the hook of the electric hoist. When the upper concrete floor of the target concrete floor is used as an auxiliary load-bearing structure, a flexible connector is prepared, and a through hole is opened in the upper concrete floor of the target concrete floor according to the position of the hanging point of the formwork system, and two first support members close to each other are placed on the upper concrete floor of the target concrete floor, and a second support member is placed on the two first support members, and the flexible connector is inserted into the through hole, wherein one end of the flexible connector passes through the gap between the two first support members and is connected to the second support member, and the other end of the flexible connector is used to hang the electric hoist.

[0022] According to some embodiments of the present application, during construction, a bottom support system is provided to support the bottom of the formwork system so as to fix the formwork system, and at the same time, the bottom support system is utilized as an auxiliary load-bearing structure.

[0023] According to some embodiments of the present application, the hanging system also includes an electric hoist, one end of the hanging rope is connected to the formwork system, and the other end of the hanging rope is connected to the hook of the electric hoist. When the bottom support system is used as an auxiliary load-bearing structure, a bracket is prepared and placed on the top of the target concrete floor, and the electric hoist is supported by the bracket.

[0024] According to some embodiments of the present application, after the formwork system is fixed by the bottom support system, the lifting rope, the electric hoist and the bracket are removed.

[0025] According to some embodiments of the present application, the bottom support system includes a pin-and-key type scaffolding.

[0026] According to some embodiments of the present application, the bottom support system further includes an adjustable top support disposed on the top of the pin-key type scaffolding.

[0027] According to some embodiments of the present application, before the formwork system is lifted by the hanging system, a positioning block is arranged on the anchor bar, and the distance between the bottom end of the positioning block and the bottom of the target concrete floor slab is equal to the thickness of the concrete laminate layer.

[0028] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 It is a schematic diagram of the structure after pouring the concrete overlay layer at the bottom of the target concrete floor slab;

[0031] Figure 2 yes Figure 1 A partial enlarged schematic diagram in the middle;

[0032] Figure 3 It is a structural schematic diagram when the upper concrete floor slab of the target concrete floor slab is used as an auxiliary load-bearing structure;

[0033] Figure 4 yes Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0034] Figure 5 yes Figure 3 A partial enlarged schematic diagram of point C in the middle;

[0035] Figure 6 It is a structural diagram when the bottom support system is used as an auxiliary load-bearing structure;

[0036] Figure 7 It is a structural diagram when the formwork system is fixed by using the bottom support system;

[0037] Figure 8 yes Figure 7 A partial enlarged schematic diagram of point D in the middle.

[0038] Reference numerals:

[0039] Target concrete floor 100, grouting hole 110, anchor bar 200, original structural beam 300, bottom bar 400, lifting rope 510, electric hoist 520, flexible connector 530, first support member 540, second support member 550, bracket 560, concrete superposition layer 600, formwork 710, main rib 720, secondary rib 730, upper concrete floor 800, through hole 810, pin-key scaffolding 910, adjustable top support 920, supporting part 921, screw 922, and nut 923. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0041] In the description of the present application, it should be understood that if orientation descriptions are involved, the orientations or positional relationships indicated, such as up, down, front, back, left, and right, are based on the orientations or positional relationships shown in the accompanying drawings. This is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present application.

[0042] In the description of this application, if the words "some", "greater than", "less than", "exceed", "above", "below", "within" etc. appear, "some" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number, and "above", "below", "within", etc. are understood to include the number.

[0043] In the description of this application, if the words "first", "second", etc. appear, they are only used to distinguish technical features and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0044] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0045] Reference Figures 1 to 8 According to the embodiment of the present application, the method for reinforcing a concrete floor slab comprises the following steps:

[0046] Processing the bottom of the target concrete floor 100, specifically, removing the ceiling or plaster layer at the bottom of the target concrete floor 100 to expose the concrete surface, roughening the exposed concrete surface and cleaning the floating dust;

[0047] Pop out grid lines at the bottom of the target concrete floor 100 according to preset specifications, and implant anchor bars 200 at all intersections of the grid lines;

[0048] A control line of the bottom reinforcement 400 is popped out on the original structural beam 300 around the target concrete floor 100, and the bottom reinforcement 400 extending in the longitudinal direction and in the transverse direction is implanted on the original structural beam 300 around the target concrete floor 100 along the control line elevation at a preset interval;

[0049] Tie and fix the implanted bottom reinforcement 400 to the implanted anchor reinforcement 200;

[0050] Prepare the formwork system and perform safety calculations on the hanging points of the formwork system to determine the positions of the hanging points of the formwork system;

[0051] According to the determined hanging point position, a grouting hole 110 is opened on the target concrete floor slab 100;

[0052] Opening a grouting hole (not shown in the figure) on the target concrete floor slab 100;

[0053] Installing a hanging system, passing a hanging rope 510 of the hanging system through the opened grouting hole 110 and lifting the formwork system to a preset position at the bottom of the target concrete floor 100;

[0054] Seal the relevant gaps;

[0055] Pouring grouting material through the opened grouting holes 110 to form a concrete laminated layer 600;

[0056] After the strength of the poured concrete superposition layer 600 reaches the required level, the formwork system is removed;

[0057] The auxiliary load-bearing structure is used to assist the target concrete floor slab 100 in bearing the dead load and live load during the construction process.

[0058] During construction, a concrete superposition layer 600 is poured at the bottom of the target concrete floor 100 to improve the bearing capacity of the floor structure. The auxiliary load-bearing structure is used to assist the target concrete floor 100 in bearing the dead load and live load during the construction process, which is beneficial to reducing the risk of the target concrete floor 100 being damaged due to insufficient bearing capacity during the construction process, thereby helping to reduce safety hazards during the construction process.

[0059] It should be noted that the above-mentioned related gaps refer to the gaps at the joints of adjacent templates 710 and the gaps at the intersections of the templates 710 and the original structural beams 300 around the target concrete floor 100 .

[0060] The gaps at the joints of adjacent templates 710 are sealed with double-sided tape or transparent adhesive tape, and the gaps at the intersections of the templates 710 and the original structural beams 300 around the target concrete floor 100 are sealed with water-expandable sealing strips.

[0061] Specifically, the anchor bar 200 is in an "L" shape. Of course, the anchor bar 200 may also be in a "J" shape or other shapes, which are not limited here.

[0062] It should be noted that the exposed length of the anchor bar 200 is less than or equal to the thickness of the concrete laminated layer 600, so that the anchor bar 200 does not extend out of the poured concrete laminated layer 600, which helps to reduce the difficulty of subsequent surface treatment.

[0063] It should be noted that during the construction process, the anchor bars 200 and the bottom bars 400 are implanted by drilling.

[0064] It should be noted that the template system, as a well-known technology, usually includes a template 710, a main rib 720 and a secondary rib 730. The main rib 720 is used to support the secondary rib 730, and the secondary rib 730 is used to support the template 710. The main rib 720 and the secondary rib 730 are perpendicular to each other. Among them, the template 710 is usually made of bamboo board or plywood, the main rib 720 is usually made of I-beam, and the secondary rib 730 is usually made of square tube or square wood.

[0065] It should be noted that when pouring grouting material, the overflow hole is used for exhaust. Pouring can only be stopped when grouting material is observed to overflow from the overflow hole.

[0066] Specifically, the grouting material used during pouring is a non-shrinkage high-strength grouting material.

[0067] It should be noted that when dismantling the formwork system, the entire formwork system should be dismantled in accordance with the principle of "support first and dismantle later, and dismantle the later supports first".

[0068] Among them, decoration and renovation construction can be carried out after the formwork system is dismantled.

[0069] It should be noted that, in some of the embodiments, the implantation depth of the bottom reinforcement 400 is greater than the implantation depth of the anchor reinforcement 200. Specifically, the implantation depth of the bottom reinforcement 400 in the original structural beam 300 is greater than the implantation depth of the anchor reinforcement 200 in the target concrete floor slab 100, which is beneficial to improve the stability and reliability of the bottom reinforcement 400 in the subsequent service process, and further helps to improve the stability and reliability of the cast concrete composite layer 600 in the subsequent service process.

[0070] Reference Figure 3 and Figure 6 In some embodiments, the hanging system also includes an electric hoist 520, one end of the lifting rope 510 is connected to the formwork system, specifically, connected to the main rib 720 of the formwork system, and the other end of the lifting rope 510 is connected to the hook of the electric hoist 520.

[0071] It should be noted that in some of the embodiments, the upper concrete floor 800 of the target concrete floor 100 is used as an auxiliary load-bearing structure, and cooperates with the hanging system to assist the target concrete floor 100 in bearing the dead load and live load during the construction process. At this time, the hanging system is dismantled after the strength of the poured concrete superposition layer 600 reaches the requirement. During the construction process, the upper concrete floor 800 of the target concrete floor 100 is used to cooperate with the hanging system to fix the formwork system, and at the same time, the upper concrete floor 800 of the target concrete floor 100 is used to cooperate with the hanging system to assist the target concrete floor 100 in bearing the dead load and live load during the construction process.

[0072] During the construction process, a casing is provided at the grouting hole 110 to facilitate the subsequent removal of the hanging system.

[0073] Reference Figure 3 and Figure 5 In some of the embodiments, when the upper concrete floor 800 of the target concrete floor 100 is used as an auxiliary load-bearing structure, a flexible connector 530 is prepared, and a through hole 810 is opened in the upper concrete floor 800 of the target concrete floor 100 according to the position of the hanging point of the formwork system, two first support members 540 close to each other are placed on the upper concrete floor 800 of the target concrete floor 100, and a second support member 550 is placed on the two first support members 540, and the flexible connector 530 is inserted into the through hole 810, wherein one end of the flexible connector 530 passes through the gap between the two first support members 540 and is connected to the second support member 550, and the other end of the flexible connector 530 is hung with an electric hoist 520. The above structure is easy to implement and easy to dismantle.

[0074] Specifically, the flexible connecting member 530 is made of steel wire rope, the first supporting member 540 is made of I-beam, and the second supporting member 550 is made of steel round rod.

[0075] It should be noted that in some other embodiments, a bottom support system is provided during construction to support the bottom of the formwork system to fix the formwork system, and the bottom support system is used as an auxiliary load-bearing structure. During the construction process, the bottom support system is used to fix the formwork system, and at the same time, the bottom support system is used to assist the target concrete floor 100 in bearing the dead load and live load during the construction process.

[0076] Reference Figure 6 In some of the embodiments, when the bottom support system is used as an auxiliary load-bearing structure, a bracket 560 is prepared and placed on the top of the target concrete floor 100. The electric hoist 520 is supported by the bracket 560. The above structure is easy to implement and easy to dismantle.

[0077] Specifically, the bracket 560 adopts a telescopic and adjustable lifting tripod. Of course, the bracket 560 can also adopt other types of bracket structures, which are not limited here.

[0078] It should be noted that in some of the embodiments, after the formwork system is fixed by the bottom support system, the lifting rope 510, the electric hoist 520 and the bracket 560 are removed, thereby reducing the load on the target concrete floor 100 when pouring the concrete superposition layer 600.

[0079] Reference Figure 7 In some of the embodiments, the bottom support system includes a pin-key type scaffolding 910, which is easy to assemble and disassemble, thereby facilitating rapid entry and exit, thereby helping to improve construction efficiency. The specific structure and working principle of the pin-key type scaffolding 910 are well-known technologies and will not be elaborated here.

[0080] Reference Figure 7 and Figure 8 In some embodiments, the bottom support system further includes an adjustable top support 920 disposed on the top of the pin-key type scaffold 910. Since the adjustable top support 920 can be raised and lowered, the bottom support system can adapt to different working heights, wherein the adjustable top support 920 is raised and lowered by a threaded connection structure.

[0081] Specifically, the adjustable top support 920 includes a supporting portion 921, a screw rod 922 and a nut 923. The supporting portion 921 is used to support the template system. The screw rod 922 is vertically arranged at the bottom of the supporting portion 921 and is used to support the supporting portion 921. The nut 923 is threadedly connected to the screw rod 922. During assembly, the nut 923 is fixed to the pipe mouth of the vertically arranged pipe body. At this time, the supporting portion 921 can be raised or lowered by driving the screw rod 922 to rotate relative to the nut 923.

[0082] It should be noted that, in some of the embodiments, before the formwork system is lifted by the hanging system, a positioning block (not shown in the figure) is provided on the anchor bar 200, and the distance between the bottom end of the positioning block and the bottom of the target concrete floor 100 is equal to the thickness of the concrete superposition layer 600. When the formwork system is lifted by the hanging system, the positioning block can position the formwork system.

[0083] Specifically, the positioning block is a prefabricated concrete part, which is tied and fixed on the anchor bar 200. Since the positioning block, which is also a concrete structure, will not affect the structural strength of the concrete composite layer 600, there is no need to remove the positioning block before pouring the concrete composite layer 600, which helps to reduce the difficulty of construction.

[0084] In the description of this specification, if the description involves reference terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" and "some examples", it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0085] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A method for reinforcing a concrete floor, characterized in that: The following steps are involved: Processing the bottom of the target concrete floor slab to expose the concrete surface, and roughening the exposed concrete surface; Anchor bars are implanted at the bottom of the target concrete slab; Implant bottom reinforcement into the original structural beams around the target concrete floor slab; Tie and fix the bottom reinforcement to the anchor reinforcement; Prepare the formwork system and determine the position of the lifting points of the formwork system; According to the determined hanging point position, grouting holes are opened on the target concrete floor slab; Opening overflow holes on the target concrete floor; Install the hanging system, pass the hanging rope of the hanging system through the grouting holes and lift the formwork system to the preset position; Seal the relevant gaps; pouring grouting material through the grouting holes to form a concrete overlay layer; The formwork system is removed after the strength of the concrete superimposed layer reaches the requirement; Among them, auxiliary load-bearing structures are used to assist the target concrete floor slab in bearing the dead load and live load during the construction process.

2. The method for reinforcing a concrete floor slab according to claim 1, characterized in that: The implantation depth of the bottom reinforcement is greater than the implantation depth of the anchor reinforcement.

3. The method for reinforcing a concrete floor slab according to claim 1, characterized in that: The upper concrete floor slab of the target concrete floor slab is used as an auxiliary load-bearing structure, and cooperates with the hanging system to assist the target concrete floor slab in bearing the dead load and live load during the construction process.

4. The method for reinforcing a concrete floor slab according to claim 3, characterized in that: The hanging system also includes an electric hoist, one end of the hanging rope is connected to the formwork system, and the other end of the hanging rope is connected to the hook of the electric hoist. When the upper concrete floor of the target concrete floor is used as an auxiliary load-bearing structure, a flexible connector is prepared, and a through hole is opened in the upper concrete floor of the target concrete floor according to the position of the hanging point of the formwork system, and two first support members close to each other are placed on the upper concrete floor of the target concrete floor, and a second support member is placed on the two first support members, and the flexible connector is inserted into the through hole, wherein one end of the flexible connector passes through the gap between the two first support members and is connected to the second support member, and the other end of the flexible connector is used to hang the electric hoist.

5. The method for reinforcing a concrete floor slab according to claim 1, characterized in that: During construction, a bottom support system is arranged to support the bottom of the formwork system so as to fix the formwork system, and at the same time, the bottom support system is used as an auxiliary load-bearing structure.

6. The method for reinforcing a concrete floor slab according to claim 5, characterized in that: The hanging system also includes an electric hoist, one end of the hoisting rope is connected to the formwork system, and the other end of the hoisting rope is connected to the hook of the electric hoist. When the bottom support system is used as an auxiliary load-bearing structure, a bracket is prepared and placed on the top of the target concrete floor slab, and the electric hoist is supported by the bracket.

7. The method for reinforcing a concrete floor slab according to claim 6, characterized in that: After the formwork system is fixed by the bottom support system, the lifting rope, the electric hoist and the bracket are removed.

8. The method for reinforcing a concrete floor slab according to claim 5, characterized in that: The bottom support system includes a pin-and-key type scaffold.

9. The method for reinforcing a concrete floor slab according to claim 8, characterized in that: The bottom support system also includes an adjustable top support disposed on the top of the pin-and-key scaffold.

10. The method for reinforcing a concrete floor slab according to claim 1, characterized in that: Before the formwork system is lifted by the hanging system, a positioning block is arranged on the anchor bar, and the distance between the bottom end of the positioning block and the bottom of the target concrete floor slab is equal to the thickness of the concrete laminate layer.

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