A construction technology for reinforcing and strengthening wall body by prefabricated plate

Abstract

The present application relates to a kind of construction technology for reinforcing wall with prefabricated slab, including wall surface is chiseled, measurement is laid, rigid short reinforcement and steel skeleton are embedded in the wall to be reinforced, prefabricated slab is arranged in turn, and its overall flatness is adjusted, then prefabricated slab is fixedly connected with steel skeleton, the gap between prefabricated slab units is manually sealed with edge sealing material, and the tightness of edge sealing is checked, whether prefabricated slab leaks is checked by adding water to the gap between prefabricated slab and wall, and wall is fully moistened, and the gap between prefabricated slab and wall is grouted by reserved pouring reserved hole.The prefabricated slab installation construction technology used in the present application solves the problem of long construction period, low efficiency and high cost of manual concrete pressing and smoothing construction, increases the tightness and strength of wall, and improves the seismic resistance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of building, and relates to reinforcing and strengthening of walls, beams and columns of buildings, in particular to a construction process for reinforcing and strengthening walls by using prefabricated plates. BACKGROUND

[0002] At present, the measures for reinforcing and strengthening walls, beams and columns of buildings are mainly through manual concrete pressing and smoothing construction. Since the force of manual operation is uneven, the flatness of the wall surface is greatly affected, and the labor intensity is large, the construction period is long, and the efficiency is low. SUMMARY

[0003] In order to solve the above-mentioned defects and deficiencies, the embodiments of the present application provide a construction process for reinforcing and strengthening walls by using prefabricated plates.

[0004] The technical solution is as follows: a construction process for reinforcing and strengthening walls by using prefabricated plates, comprising a plurality of steel frames and a plurality of rigid short bars embedded in the wall to be reinforced and perpendicular to the wall surface, the rigid short bars extending out of the wall to be reinforced by a certain distance, the steel frames being arranged horizontally below the rigid short bars and fixed together with the rigid short bars;

[0005] A prefabricated plate is arranged between adjacent steel frames, each prefabricated plate serving as a unit and having a plurality of crosswise arranged weldable metal wires arranged therein as supports, the weldable metal wires being reserved a certain length outside the four peripheral edges of the prefabricated plate, the weldable metal wires reserved above and below the prefabricated plate being fixedly connected with the steel frames, the weldable metal wires reserved left and right of the prefabricated plate being fixedly connected with each other, and a gap L being left between adjacent two prefabricated plates in the up and down and left and right directions;

[0006] The number and spacing of the steel frames and the rigid short bars are matched with the size and number of the prefabricated plates;

[0007] The specific construction steps are as follows:

[0008] Firstly, the wall surface is chiseled, before the construction of the high ductility concrete prefabricated plate, the original decorative layer on the wall surface of the wall to be reinforced must be removed according to the requirements, and the surface dust is cleaned, if there are cracks or damages, the repair treatment should be carried out first;

[0009] Secondly, the measurement and line laying are carried out, according to the planar size of the wall to be reinforced and the size of the prefabricated plate, the wall to be reinforced is pre-arranged with a line, and the position of the reference line is determined;

[0010] Thirdly, installing steel skeleton, setting up rigid short bars perpendicular to the plane of the wall to be reinforced according to the design requirements, setting up horizontal steel skeleton below the rigid short bars, and fixing the rigid short bars and the steel skeleton;

[0011] Fourthly, arranging the prefabricated plates according to the reference line of the layout, adjusting the overall flatness of the prefabricated plates with a ruler or an infrared level, and then fixing the weldable metal wires reserved above the prefabricated plates and the steel skeleton.

[0012] Fifthly, filling the gap L between the two adjacent prefabricated plates with edge sealing material, and checking the overall flatness of the prefabricated plates again before edge sealing, and manually sealing the gap between the prefabricated plate units with the edge sealing material after the prefabricated plates meet the design requirements, so that the edge sealing is smooth, tight and full.

[0013] When edge sealing, reserving exhaust holes at the highest points of the vertical gaps between the prefabricated plates and reserving pouring reserved holes at the lowest points, and checking the exhaust holes immediately after edge sealing to ensure that the exhaust holes are unobstructed.

[0014] Sixthly, checking the tightness of the edge sealing, and adding water to the gap between the prefabricated plates and the wall to be reinforced through the pouring reserved holes after the edge sealing material is finally cured, checking whether the prefabricated plates leak, and fully wetting the wall to be reinforced, and resealing if there is leakage.

[0015] Seventhly, grouting, grouting the gap between the prefabricated plates and the wall to be reinforced through the pouring reserved holes, dividing each prefabricated plate into a grouting unit, spacing one day for grouting units at different elevations, and grouting from low units to high units, and simultaneously grouting the grouting units at the same level with an interval of one unit, and preferably completing the grouting of each grouting unit at one time.

[0016] Eighthly, quality acceptance, checking the effective dense area of the prefabricated plates by knocking with a small hammer after grouting, and indicating that the grouting is dense if there is no hollow sound, otherwise, the grouting should be supplemented, and the supplementing should be performed after three days.

[0017] Further, when setting up the steel skeleton and the rigid short bars on the wall to be reinforced, the brick joints should be avoided, the implantation depth should be controlled, the wall to be reinforced should not be penetrated, and grouting leakage should be avoided.

[0018] Further, when installing the prefabricated plates, the weldable metal wires reserved above the prefabricated plates are first fixed with the steel skeleton, then the weldable metal wires reserved between the left and right adjacent prefabricated plates are fixed together, and finally the weldable metal wires reserved below the prefabricated plates are fixed with the steel skeleton.

[0019] Further, the edge sealing material is a cement-based material.

[0020] Further, the edge sealing material is a high ductility concrete material.

[0021] Further, the prefabricated plate is a high ductility concrete prefabricated plate.

[0022] Further, the grouting material should be measured before grouting, and sufficient grouting material should be prepared, the fluidity of the grouting material after stirring is checked, and the grouting is carried out only when the requirements are met, so as to reduce the waiting time and reduce the impact of air entering during grouting on the prefabricated plate.

[0023] Further, during grouting, slow and continuous grouting should be carried out to prevent the initial setting of the grouting material and cause resistance to subsequent grouting.

[0024] Further, during grouting, a special person should be assigned to monitor and control, and the leakage should be plugged in time.

[0025] Further, the grouting material is a special grouting material.

[0026] The construction process for reinforcing and strengthening the wall body by using the prefabricated plate has the following beneficial effects:

[0027] The high-ductility prefabricated plate is used to reinforce and strengthen the wall body, beams and columns of the building, and replaces the high-ductility concrete manual pressing and smoothing construction technology to promote application in the project, which has remarkable practical effect, saves cost, saves labor input, greatly shortens the construction period, and achieves good economic benefits.

[0028] The position of the reference line is determined by measuring the line, so that the prefabricated plate can be reasonably and aesthetically arranged on the wall body.

[0029] The prefabricated plate is sealed by using high-ductility concrete, an exhaust hole is reserved at the highest point of the vertical gap between the prefabricated plates, so that the gas can flow smoothly during grouting and no bubbles are formed; a grouting reserved hole is reserved at the lowest point, and the grouting material flows slowly from bottom to top during grouting, so that the compactness of grouting can be increased.

[0030] In addition, the exhaust hole and the grouting reserved hole can also be used to add water to the gap between the prefabricated plate and the wall body after the final setting of the edge sealing material, check whether the installed prefabricated plate leaks, and fully wet the wall to be reinforced, if there is leakage, secondary plugging should be carried out to avoid large area rework.

[0031] The grouting is carried out through the grouting reserved hole in the gap between the prefabricated plate and the wall body, the grouting units at different elevations should be intervalled for one day, the grouting sequence should be from low unit to high unit, and the grouting units at the same horizontal plane can be carried out simultaneously at an interval of one unit, so as to avoid that the weight of the wall at the same height is too large and affects the adhesion of the wall.

[0032] Each prefabricated plate is divided into a grouting unit, so that continuous grouting of small area can be realized at one time, and initial setting of grouting material is prevented, so that gap is prevented from being generated and the overall strength is affected.

[0033] Through the above construction process, the method of reinforcing and strengthening the wall by using the prefabricated plate not only makes the wall flat and beautiful, but also increases the tightness and strength of the wall, improves the earthquake resistance, and has the advantages of energy saving, environmental protection and short construction period. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] Fig. 1 is a construction schematic diagram of reinforcing and strengthening the wall by using the prefabricated plate provided in the embodiment;

[0036] Fig. 2 is a prefabricated plate installation schematic diagram;

[0037] Fig. 3 is a gap filling schematic diagram between the prefabricated plates;

[0038] Fig. 4 is a prefabricated plate and steel skeleton connection schematic diagram.

[0039] The drawings show that: 1 is a wall to be reinforced, 2 is a steel skeleton, 3 is a rigid short bar, 4 is a prefabricated plate, 4.1 is a weldable wire, 5 is an exhaust hole, and 6 is a pouring reserved hole. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will be combined with the drawings of the present application to make the following detailed description. Figs. 1 to 4 The embodiments of the present application will be further described in detail.

[0041] A construction process for reinforcing and strengthening the wall by using the prefabricated plate, comprising a wall to be reinforced 1 and a steel skeleton 2, a plurality of parallel and spaced rigid short bars 3 perpendicular to the wall surface are embedded in the wall to be reinforced 1, the rigid short bars 3 extend out of the wall to be reinforced 1 by a certain distance, the steel skeleton 2 is arranged in the horizontal direction and is located below and fixed with the rigid short bars 3;

[0042] The prefabricated slab 4 is arranged between the adjacent steel frames 2, each prefabricated slab 4 is taken as a unit, a plurality of weldable metal wires 4.1 are arranged in the prefabricated slab 4 as supports, the weldable metal wires 4.1 are reserved outside the four peripheral edges of the prefabricated slab 4, the weldable metal wires 4.1 reserved above and below the prefabricated slab 4 are fixedly connected with the steel frames 2, the weldable metal wires 4.1 reserved in the left-right direction of the prefabricated slab 4 are fixedly connected with each other, and the adjacent two prefabricated slabs 4 are left with gaps L in the up-down and left-right directions;

[0043] The number and spacing of the steel frames 2 and the rigid short bars 3 are matched with the size and number of the prefabricated slabs 4;

[0044] The specific construction steps are as follows:

[0045] Firstly, the wall surface is chiseled, before the construction of the high ductile concrete prefabricated slab, the original decorative layer on the wall surface of the wall body to be reinforced 1 must be chiseled according to the requirements, and the surface dust is cleaned, if there is a crack or damage, the repair treatment should be carried out first;

[0046] Secondly, the measurement and line laying are carried out, according to the plane size of the different wall bodies to be reinforced 1 and the size of the prefabricated slab 4, the wall body to be reinforced 1 is pre-arranged with a line, the position of the reference line is determined, and the prefabricated slab 4 is reasonably and aesthetically arranged on the wall body to be reinforced 1;

[0047] Thirdly, the steel frame 2 is installed, according to the design requirements, the rigid short bar 3 perpendicular to the plane of the wall body to be reinforced 1 is arranged on the wall body to be reinforced 1, the steel frame 2 in the horizontal direction is arranged below the rigid short bar 3, and the rigid short bar 3 and the steel frame 2 are fixedly connected;

[0048] Fourthly, each prefabricated slab 4 is taken as a unit, the prefabricated slab 4 is arranged in sequence according to the line laying reference line, the overall flatness of the prefabricated slab 4 is adjusted by using a ruler or an infrared level meter, and then the weldable metal wires 4.1 reserved above the prefabricated slab 4 are fixedly connected with the steel frame 2;

[0049] Fifthly, the gap L between the adjacent two prefabricated slabs 4 is filled with an edge sealing material, the prefabricated slab 4 is sealed, the overall flatness of the prefabricated slab 4 is checked again before the sealing, after the prefabricated slab 4 meets the design requirements, the gap between the prefabricated slab 4 units is manually sealed with the edge sealing material, and the prefabricated slab 4 is smooth, tight and full after the sealing;

[0050] When the edge is sealed, the exhaust hole 5 is reserved at the highest point of the vertical gap between the prefabricated slabs 4, and the pouring reserved hole 6 is reserved at the lowest point, and the exhaust hole 5 is checked to ensure that it is unobstructed immediately after the sealing;

[0051] The pouring reserved hole 6 is reserved at the lowest point, and the grouting material flows slowly from bottom to top during grouting, so that the compactness of grouting can be increased.

[0052] The sixth step is to check the tightness of the edge. After the edge material is finally cured, water is added to the gap between the prefabricated plate 4 and the wall to be reinforced 1 through the reserved pouring reserved hole 6, and the installation of the prefabricated plate 4 is checked for water leakage, and the wall to be reinforced 1 is fully moistened. If there is water leakage, secondary plugging should be carried out.

[0053] The edge material is a cement-based material, preferably a high ductility concrete material, which improves the strength of the wall and increases the seismic resistance.

[0054] The seventh step is grouting. The gap between the prefabricated plate 4 and the wall to be reinforced 1 is grouted through the reserved pouring reserved hole 6, and each prefabricated plate 4 is divided into a grouting unit. The grouting units at different elevations should be spaced one day apart, and the grouting sequence should be from low to high. The grouting units at the same level can be carried out simultaneously at intervals of one unit. Each grouting unit should be completed at one time.

[0055] Before grouting, the grouting material should be measured and sufficient grouting material should be prepared. After mixing, check the fluidity to meet the requirements before grouting to reduce waiting time and reduce the impact of air entering during grouting on the prefabricated plate 4.

[0056] During grouting, it should be slow and continuous to prevent the grouting material from initial setting and causing resistance to subsequent grouting.

[0057] During grouting, a dedicated person should be assigned to monitor and control it, and timely plugging should be carried out if there is grouting leakage.

[0058] The grouting material is a special grouting material.

[0059] The eighth step is quality acceptance. After grouting is completed, the prefabricated plate 4 is tested for effective dense area by knocking with a small hammer. If there is no hollow sound, it indicates that it has been grouted and dense. Otherwise, grouting should be supplemented after three days.

[0060] When installing the steel skeleton 2 and rigid short reinforcement 3 on the wall to be reinforced 1, it is advisable to avoid brick joints and control the implantation depth to avoid penetrating the wall to be reinforced 1 and causing grouting leakage.

[0061] When installing the prefabricated plate 4, the upper reserved weldable metal wire 4.1 of the prefabricated plate 4 is first fixed together with the steel skeleton 2, then the left and right adjacent prefabricated plates 4 are fixed together through the left and right reserved weldable metal wires 4.1 of the prefabricated plate 4, and finally the lower reserved weldable metal wire 4.1 of the prefabricated plate 4 is fixed and connected with the steel skeleton 2. The weldable metal wire 4.1 can be steel wire or iron wire.

[0062] The prefabricated plate 4 described above is a high ductility concrete prefabricated plate.

[0063] Construction quality requirement: high ductility concrete precast slab engineering acceptance executes "high ductility concrete application technical specification". High ductility concrete precast slab grouting engineering and test block making, execute "engineering structure reinforcement material safety appraisal technical specification" (GB50728-2011).

[0064] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A construction process for reinforcing and strengthening walls using precast panels, characterized in that, It includes several walls to be reinforced (1) and several rigid frames (2). Several parallel and spaced rigid short ribs (3) are embedded in the walls to be reinforced (1) and are perpendicular to the wall surface. The rigid short ribs (3) extend a certain distance from the walls to be reinforced (1). The rigid frames (2) are set horizontally, located below the rigid short ribs (3) and fixed together with the rigid short ribs (3). Precast slabs (4) are set between adjacent rigid frames (2). Each precast slab (4) is a unit, and several crisscrossing weldable metal wires (4.1) are set inside as supports. The weldable metal wires (4.1) are reserved for a certain length outside the four edges of the precast slab (4). The weldable metal wires (4.1) reserved above and below the precast slab (4) are fixedly connected to the rigid frame (2). The weldable metal wires (4.1) reserved in the left and right directions of the precast slab (4) are fixedly connected to each other. There is a gap L between two adjacent precast slabs (4) in the top and bottom and left and right directions. The number and spacing of the rigid frame (2) and rigid short ribs (3) are matched with the size and number of the precast slab (4); The specific construction steps are as follows: The first step is to chisel the wall surface. Before the construction of the high ductility concrete precast slab, the original decorative layer on the wall surface of the wall to be reinforced (1) must be removed as required, and the surface dust must be cleaned. If there are cracks or damage, they should be repaired first. The second step is to measure and lay out the lines. Based on the different planar dimensions of the wall to be reinforced (1) and the size of the precast slab (4), the wall to be reinforced (1) is pre-arranged and the lines are drawn to determine the position of the baseline. The third step is to install the rigid frame (2). According to the design requirements, a rigid short bar (3) perpendicular to the plane of the wall to be reinforced (1) is set on the wall to be reinforced. A horizontal rigid frame (2) is set below the rigid short bar (3). The rigid short bar (3) is fixedly connected to the rigid frame (2). The fourth step is to take each precast slab (4) as a unit, arrange the precast slabs (4) in sequence according to the layout baseline, and adjust the overall flatness of the slabs (4) using a straightedge or infrared level. Then, fix the weldable metal wire (4.1) reserved above the precast slab (4) to the rigid frame (2). Fifth step, fill the gap L between the two adjacent precast slabs (4) with edge sealing material, and seal the edges of the precast slabs (4). Before sealing the edges, check the overall flatness of the precast slabs (4) installation again. After meeting the design requirements, manually seal the gaps between the precast slab (4) units with edge sealing material. After sealing, the edges should be flat, tight and full. When sealing the edges, a vent hole (5) is reserved at the highest point of the vertical gap between the precast slabs (4), and a grouting reserved hole (6) is reserved at the lowest point. After sealing the edges, check immediately to ensure that the vent hole (5) is unobstructed. Step 6: Check the tightness of the sealing. After the sealing material has fully hardened, add water to the gap between the precast slab (4) and the wall to be reinforced (1) through the reserved injection hole (6). Check whether the installed precast slab (4) leaks water and fully wet the wall to be reinforced (1). If there is any leakage, it should be sealed a second time. Step 7, grouting. Grout is injected into the gap between the precast slab (4) and the wall to be reinforced (1) through the reserved grouting hole (6). Each precast slab (4) is divided into a grouting unit. Grouting units at different elevations should be carried out at 1-day intervals. The grouting sequence should proceed from the lower unit to the higher unit. Grouting units on the same horizontal plane can be carried out simultaneously at 1-unit intervals. Each grouting unit should be completed in one go. Step 8, quality acceptance. After the grouting is completed, tap the precast slab (4) with a small hammer to check the effective compacted area. If there is no hollow sound, it means that it has been grouted and compacted. Otherwise, grouting should be added. Grouting should be done 3 days later.

2. The construction process for reinforcing and strengthening walls using precast panels according to claim 1, characterized in that, When installing the rigid frame (2) and rigid short bars (3) on the wall to be reinforced (1), it is advisable to avoid the brick joints, control the implantation depth, avoid penetrating the wall to be reinforced (1), and avoid grout leakage during grouting.

3. The construction process for reinforcing and strengthening walls using precast panels according to claim 1, characterized in that, When installing the precast slab (4), first fix the weldable metal wire (4.1) reserved on the top of the precast slab (4) to the rigid frame (2), then fix the adjacent precast slabs (4) together through the weldable metal wire (4.1) reserved on the left and right sides of the precast slab (4), and finally fix the weldable metal wire (4.1) reserved on the bottom of the precast slab (4) to the rigid frame (2).

4. The construction process for reinforcing and strengthening walls using precast panels according to claim 1, characterized in that, The edge sealing material is a cement-based material.

5. The construction process for reinforcing and strengthening walls using precast panels according to claim 4, characterized in that, The edge sealing material is high-ductility concrete.

6. The construction process for reinforcing and strengthening walls using precast panels according to claim 1, characterized in that, The precast slab (4) is a high-ductility concrete precast slab.

7. The construction process for reinforcing and strengthening walls using precast panels according to claim 1, characterized in that, Before grouting, the grouting material should be measured and sufficient grouting material should be prepared. After mixing, its fluidity should be checked. Grouting can only be carried out if it meets the requirements, so as to reduce the waiting time and reduce the impact of air entering the precast slab (4) caused by grouting interruption.

8. The construction process for reinforcing and strengthening walls using precast panels according to claim 7, characterized in that, Grouting should be carried out slowly and continuously to prevent the grout from setting too early and creating resistance to subsequent grouting.

9. The construction process for reinforcing and strengthening walls using precast panels according to claim 5, characterized in that, During grouting, a dedicated person should be assigned to monitor the process and promptly seal any leaks.

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