A method for constructing a precision flat concrete floor based on armored seams

Abstract

The application provides a kind of based on the accurate flat concrete floor construction method of armored joint, for concrete floor construction technical field;The method is used armored joint grid formed by assembling armored joint, armored joint includes single armored joint and node armored joint;Armored joint grid includes grid straight seam and column edge seam, column edge seam includes several single armored joint and / or node armored joint;Grid straight seam includes shrinkage joint and expansion joint;Armored joint is fixed on the ground by fixed support, and the edge steel plate is used as guide rail to run and scrape leveling device when concrete is finished and leveled.The application sets single armored joint and node armored joint, and increases column edge seam, realizes fast installation on construction site, improves construction efficiency;By reasonably setting shrinkage joint and expansion joint, the continuous pouring of concrete is realized, and the generation of cracks is effectively controlled;Armored joint does not need to be removed, which simplifies the process flow;Armored joint is used as the guide rail for scraping, which improves the concrete finishing and leveling construction effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of concrete floor construction, in particular to a precision flat concrete floor construction method based on armored joints. BACKGROUND

[0002] Floor refers to the ground directly contacting the building bottom and the foundation soil. Concrete floor is widely used in industrial plants, logistics warehouses, sports venues, laboratories and other buildings, which may be subjected to the load of upper pedestrians, vehicles and production equipment, and therefore the floor should have good strength, stiffness, flatness and durability.

[0003] Due to the large area of the concrete floor, the concrete is prone to cracking due to temperature and its own shrinkage during construction, so the existing concrete floor construction technology mainly adopts the jump bin method. The jump bin method divides the large area floor into multiple small area bins by setting up formwork, pours concrete in each independent bin, and pours concrete in the adjacent area after the concrete in the bin is basically completed. Thus, the large area floor cracking caused by concrete shrinkage can be avoided, thereby ensuring the construction quality of the concrete floor. However, this method consumes a large amount of building materials such as wooden formwork and wooden square, and requires a large amount of human resources for repeated setting and removal, which is low in construction efficiency. There is also a method of using a separate bin joint for construction in the prior art, which mainly has four methods of traditional formwork type separate bin joint, customized separate bin joint, steel embedded type separate bin joint and post cutting separate bin joint. The same method needs to be repeatedly installed and removed, the process is complex, and the installation precision and reliability of the traditional separate bin joint formwork are poor, which makes quality control difficult and it is difficult to achieve the ideal use effect. SUMMARY

[0004] To solve the above technical problems, the present application provides a precision flat concrete floor construction method based on armored joints, which is especially suitable for large area concrete floor construction and uses single armored joints and node armored joints to form an armored joint grid, which is simple to operate and has good construction effect.

[0005] The technical scheme adopted by the present application is as follows:

[0006] A precision flat concrete floor construction method based on armored joints, which uses armored joints to form an armored joint grid and divides the concrete floor into several separate bin areas.

[0007] The armored joint includes a single armored joint and a node armored joint; the single armored joint includes a straight single armored joint and an arc single armored joint; the node armored joint includes a plurality of single armored joints, including one or more of a cross-shaped node armored joint, a T-shaped node armored joint, a Y-shaped node armored joint, an arc straight intersection node armored joint and an L-shaped node armored joint.

[0008] Further, the armored joint grid comprises a plurality of parallel and perpendicular grid straight joints arranged in rows and columns along the building wall.

[0009] Further, the armored joint grid further comprises a column edge joint arranged along the building column grid, the column edge joint comprising a plurality of the single armored joints and / or the node armored joints, separating the concrete floor slab around the column into independent sub-areas.

[0010] Further, the armored joint grid comprises a shrink joint and an expansion joint; the spacing between the shrink joints is the minimum value among the maximum non-cracking sub-area length of the concrete floor slab, the building column grid spacing, and 50 m.

[0011] Further, when arranging the armored joint grid, the minimum number of expansion joints is calculated, and the expansion joints are arranged in the middle area of the concrete floor slab, so that the aspect ratio of each sub-area is less than 1.5.

[0012] Further, when the side length of the sub-area is greater than 6 m, a sub-grid joint is arranged in the sub-area.

[0013] Further, the armored joint comprises: a vertical sub-area steel plate, two vertical sub-area steel plates arranged in parallel; a force transmission steel plate vertically fixed to one vertical sub-area steel plate and movably passing through the other vertical sub-area steel plate, both ends of the force transmission steel plate extending outward beyond the vertical sub-area steel plate in the horizontal direction; a movable sleeve box sleeved on one end of the force transmission steel plate movably passing through the vertical sub-area steel plate; an edge protection steel plate arranged at the upper end and the lower end of the vertical sub-area steel plate along the length direction of the vertical sub-area steel plate and extending outward beyond the vertical sub-area steel plate; a breakable bolt connecting the two vertical sub-area steel plates, one end connected with the edge protection steel plate and the other end extending outward beyond the vertical sub-area steel plate and located between the two edge protection steel plates; and a hollow reinforcing bar arranged outward of the vertical sub-area steel plate and adhered to the lower surface of the edge protection steel plate.

[0014] When the armored joint is used for the shrink joint, the two vertical sub-area steel plates are adhered;

[0015] When the armored joint is used for the expansion joint, an extruded plate is arranged between the two vertical sub-area steel plates;

[0016] The two armored joints are connected by a connecting piece passing through the hollow reinforcing bar.

[0017] Further, the armored joint is fixed to the ground by a fixing support; the fixing support comprises two parallel vertical rods and horizontal rods and inclined rods connecting the two vertical rods respectively; during installation, the fixing support is installed on one side of the armored joint, the vertical rods are embedded in the ground, and one end of the horizontal rods and the inclined rods is welded to the vertical compartment steel plate; after the concrete on the other side of the armored joint is poured, the vertical rods are cut off.

[0018] Further, after the concrete is poured, a leveling device is arranged on the upper surface of the edge protection steel plate, and the leveling device is reciprocated along the edge protection steel plate to perform leveling work.

[0019] Further, when the concrete floor is constructed, the following steps are included:

[0020] The armored joint grid and the compartment joint grid are arranged: the types, positions and quantities of the node type armored joints are determined according to the armored joint grid arrangement drawing, and then the types, positions and quantities of the single type armored joints are determined;

[0021] The armored joint is prefabricated and processed;

[0022] The line is measured and laid out;

[0023] The armored joint is assembled on site and temporarily fixed by a fixing support: the node type armored joint is installed first, and then the single type armored joint connected with the node type armored joint is installed;

[0024] The reinforcement is bound and the concrete is poured: before the concrete is poured, temporary protective tape is pasted on the upper surface of the edge protection steel plate to prevent the edge protection steel plate from being contaminated by mud; when the concrete is poured, the side of the armored joint without the fixing support is poured first, the vertical rods of the fixing support are cut off after the concrete hardens, and the concrete on the other side of the armored joint is poured;

[0025] The concrete is finished and leveled: the temporary protective tape is removed, and a leveling device is installed on the edge protection steel plate, and the edge protection steel plate is used as a guide rail to operate the leveling device;

[0026] The compartment joint is cut;

[0027] The concrete is cured;

[0028] The armored joint and the compartment joint are filled.

[0029] The present application has the advantages and positive effects that:

[0030] 1. By arranging the single type armored joint and the node type armored joint, and increasing the design of the column edge joint, the construction site is quickly installed, and the construction efficiency is improved;

[0031] 2. By reasonably setting the shrinkage and expansion joints, the continuous pouring of the concrete is realized, the generation of cracks is effectively controlled, the construction quality of the concrete floor is ensured, and the construction period is further saved;

[0032] 3. The armored joint is used as the side formwork of the concrete pouring, and does not need to be removed, so that the process flow is significantly simplified;

[0033] 4. The edge protection steel plate of the armored joint is used as the guide rail of the leveling, so that the concrete finishing and leveling construction effect is effectively improved, and the construction requirement of the flatness of the precision leveling floor on the flatness is met. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a construction method flow chart of a specific embodiment of the present application;

[0035] Figure 2 is a schematic diagram of a straight single armored joint of a specific embodiment of the present application;

[0036] Figure 3 is a schematic diagram of an arc single armored joint of a specific embodiment of the present application;

[0037] Figure 4 is a schematic diagram of a node type armored joint of a specific embodiment of the present application;

[0038] Figure 5 is a schematic diagram of a columnless armored joint grid and a sub-grid joint grid arrangement of a specific embodiment of the present application;

[0039] Figure 6 is a schematic diagram of a column armored joint grid and a sub-grid joint grid arrangement of a specific embodiment of the present application;

[0040] Figure 7 is a schematic diagram of a column edge joint of a specific embodiment of the present application;

[0041] Figure 8 is a sectional view of a single armored joint structure of a specific embodiment of the present application;

[0042] Figure 9 is a schematic diagram of a fixed support structure of a specific embodiment of the present application;

[0043] Figure 10 is a schematic diagram of the use of a fixed support in a specific embodiment of the present application;

[0044] Figure 11 is a schematic diagram of the connection of an armored joint in a specific embodiment of the present application;

[0045] Figure 12 is a schematic diagram of the use of a leveling device in a specific embodiment of the present application.

[0046] Fig.:

[0047] 1, armored joint 11, single armored joint 111, straight single armored joint

[0048] 112, arc single armored joint 1101, vertical compartment steel plate 1102, force transmission steel plate

[0049] 1103, movable sleeve 1104, breakable bolt 1105, edge protection steel plate

[0050] 1106, anchoring steel plate 1107, hollow reinforcing bar 1108, connecting piece

[0051] 1109, extruded plate 12, node type armored joint 121, cross node armored joint

[0052] 122, T-shaped node armored joint 123, Y-shaped node armored joint 124, arc straight intersection node armored joint

[0053] 125, L-shaped node armored joint 2, armored joint grid 21, grid straight joint

[0054] 211, shrinkage joint 212, expansion joint 22, column edge joint

[0055] 3, compartment area 4, grid joint 5, column

[0056] 6, fixed support 601, vertical rod 602, horizontal rod

[0057] 603, inclined rod 7, ground 8, screed device DETAILED DESCRIPTION

[0058] The embodiments of the present application will be described below with reference to the accompanying drawings.

[0059] First, it should be noted that all directional indications, such as upper, lower, left, right, front, rear, etc., in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0060] The drawings of the present specification are schematic drawings that assist in explaining the concept of the present application and schematically represent the shape of each part and the relationship between them. Please note that in order to clearly show the structure of each component of the embodiments of the present application, the drawings are not drawn according to the same scale. The same reference signs are used to represent the same parts.

[0061] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like shall be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium, can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] The present application provides a kind of based on armored joint precision flat concrete floor construction method, for concrete floor construction, in a specific embodiment, as shown in Figure 1 The method comprises the following steps:

[0063] S1, arrange armored joint grid 2 and grid, determine the type, position and quantity of node type armored joint 12, then determine the type, position and quantity of single type armored joint 11;

[0064] In the present embodiment, armored joint 1 is assembled to form armored joint grid 2, and the concrete floor is divided into several sub-bin areas 3;

[0065] In the present embodiment, as shown in Figures 2-4 Armored joint 1 includes single type armored joint 11 and node type armored joint 12;Single type armored joint 11 includes straight line single type armored joint 111 and arc line single type armored joint 112;Wherein node type armored joint 12 includes a plurality of single type armored joints 11, and the form of node type armored joint 12 includes one or more of cross-shaped node armored joint 121, T-shaped node armored joint 122, Y-shaped node armored joint 123, arc straight intersection node armored joint 124 and L-shaped node armored joint 125.

[0066] Specifically, cross-shaped node armored joint 121 includes four straight line single type armored joints 111, wherein two straight line single type armored joints 111 are arranged along the same axis, and the other two straight line single type armored joints 111 are arranged along the axis in another perpendicular direction, and the four straight line single type armored joints 111 are connected with each other;T-shaped node armored joint 122 includes three straight line single type armored joints 111, wherein two straight line single type armored joints 111 are arranged along the same axis, and the other straight line single type armored joint 111 is arranged along the axis in another perpendicular direction, and the three straight line single type armored joints 111 are connected with each other;Y-shaped node armored joint 123 includes three straight line single type armored joints 111 extending in different directions and connected with each other;L-shaped node armored joint 125 includes two straight line single type armored joints 111 connected vertically;Arc straight intersection node armored joint 124 includes connected straight line single type armored joint 111 and arc line single type armored joint 112.

[0067] In this embodiment, the node-type armor seam 12 is arranged as an integral structure in the armor seam grid 2. The node-type armor seam 12 also includes other shapes set according to actual needs, including but not limited to cross-shaped node armor seam 121, T-shaped node armor seam 122, Y-shaped node armor seam 123, arc-straight intersecting node armor seam 124 and L-shaped node armor seam 125.

[0068] In a specific embodiment, such as Figure 5 As shown, no columns 5 are present within the area of ​​the proposed concrete floor. The armored joint grid 2 includes multiple rows and columns of straight grid joints 21 arranged parallel and perpendicular to the building walls. The armored joint grid 2 includes contraction joints 211 and expansion joints 212. In other words, the straight grid joints 21 include contraction joints 211 and expansion joints 212. By setting the armored joint grid 2, the large area of ​​the concrete floor is divided into multiple small compartment areas 3, which can sever the horizontal connection between each compartment area 3. This allows the concrete poured in each independent compartment area 3 to undergo free shrinkage and expansion deformation, ensuring the forming effect of the concrete floor and preventing cracking of the concrete floor.

[0069] In another specific implementation, such as Figure 6 As shown, columns 5 are located within the area of ​​the concrete floor to be constructed. The armored joint grid 2 includes multiple rows and columns of straight grid joints 21 arranged parallel and perpendicular to the building walls, and column edge joints 22. The column edge joints 22 surround the columns 5 within the building and include several individual armored joints 11 and / or node-type armored joints 12, dividing the concrete floor around the columns 5 into independent compartment areas 3. The armored joint grid 2 includes contraction joints 211 and expansion joints 212, that is, both the straight grid joints 21 and the column edge joints 22 include contraction joints 211 and expansion joints 212.

[0070] In this embodiment, the form of the column edge seam 22 is set according to the position and shape of the column 5, including but not limited to rectangular column edge seam 22, rhomboid column edge seam 22, circular column edge seam 22, half-rectangular column edge seam 22, half-rhomboid column edge seam 22, half-circular column edge seam 22, quarter-rectangular column edge seam 22, quarter-rhomboid column edge seam 22, and quarter-circular column edge seam 22. Specifically, as shown... Figure 7 As shown, when the column edge joint 22 is used for a column 5 located in the middle of the concrete floor, a rectangular column edge joint 22, a rhombus column edge joint 22, or a circular column edge joint 22 can be used as needed; when the column edge joint 22 is used for a column 5 located on the side of the concrete floor, a half-rectangular column edge joint 22, a half-rhombus column edge joint 22, or a half-circular column edge joint 22 can be used as needed; when the column edge joint 22 is used for a column 5 located at the corner of the concrete floor, a quarter-rectangular column edge joint 22, a quarter-rhombus column edge joint 22, or a quarter-circular column edge joint 22 can be used as needed.

[0071] In the embodiment, the column edge joint 22 is connected with the grid straight joint 21, so that the armored joint grid 2 is arranged more reasonably and is easier to install.

[0072] In the embodiment, the rectangular column edge joint 22, the half rectangular column edge joint 22 are composed of T-shaped node armored joint, L-shaped node armored joint 125 and straight single type armored joint 111; the quarter rectangular column edge joint 22 is composed of L-shaped node armored joint 125 and straight single type armored joint 111; the diamond column edge joint 22 and the half diamond column edge joint 22 are composed of Y-shaped node armored joint 123 and straight single type armored joint 111; the quarter diamond column edge joint 22 is composed of straight single type armored joint 111; the circular column edge joint 22 and the half circular column edge joint 22 are composed of arc straight intersection node armored joint 124 and arc single type armored joint 112; the quarter circular column edge joint 22 is composed of arc single type armored joint 112.

[0073] In a specific embodiment, as shown in Figure 6 The grid straight joint 21 includes a shrink joint 211 and an expansion joint 212; in the curing stage of the concrete, each sub-compartment area 3 can freely shrink with the shrinkage of the concrete, and then the shrink joint 211 is further filled with sealing material to improve the integrity of the concrete floor; in the use stage of the concrete floor, the floor will expand with the temperature rise, and the expansion joint 212 is arranged to avoid the concrete of each variable unit from being pressed by each other due to expansion; the armored expansion joint 212 and the armored shrink joint 211 are reasonably arranged to avoid the shrinkage and temperature stress in the concrete as much as possible, so as to effectively control the crack.

[0074] In the embodiment, when the armored joint grid 2 is arranged, the interval between the shrink joints 211 is determined first, and then the minimum number of the expansion joints 212 is calculated:

[0075] The interval between the shrink joints 211 is the minimum value of the maximum non-cracking sealing length of the concrete floor, the building column grid interval and 50 m. The maximum non-cracking sealing length of the concrete floor is determined by the following formula:

[0076]

[0077] In the formula, the meanings of the letters are as follows:

[0078] [L] - maximum non-cracking sub-compartment length;

[0079] E - early elastic modulus of concrete;

[0080] H - thickness of the concrete floor;

[0081] C x - ground level resistance coefficient;

[0082] α - linear expansion coefficient of concrete;

[0083] T - sum of temperature difference of hydration heat, air temperature difference, and shrinkage equivalent temperature difference;

[0084] ε p - ultimate tensile of reinforced concrete.

[0085] The minimum number of expansion joints 212 is determined by the following formula:

[0086] [n] = αTl t Δl x

[0087] wherein each letter has the following meaning:

[0088] [n] - minimum number of expansion joints;

[0089] α - linear expansion coefficient of concrete;

[0090] T - air temperature difference between the time of pouring the floor and the annual maximum air temperature;

[0091] l t - side length of the floor;

[0092] l x - amount of compression deformation allowed for the extruded sheet 1109 used for the armored joint 1.

[0093] In this embodiment, the expansion joints 212 are provided in the middle area of the concrete floor, so that the length-width ratio of each sub-compartment area 3 is less than 1.5.

[0094] In this embodiment, after the arrangement of the armored joint grid 2 is completed by the above method, the size of each sub-compartment area 3 is reviewed, and when the side length of the sub-compartment area 3 is greater than 6 m, a sub-grid joint 4 is provided in the sub-compartment area 3, the sub-grid joint 4 further divides the single sub-compartment area 3 into several areas with a side length not greater than 6 m, forming a sub-grid joint 4 grid, and finally completing the arrangement of the sub-grid joint 4.

[0095] The sub-grid joint 4 grid includes several sub-grid joints 4 parallel to the armored joint 1, and is a non-penetrating floor gap formed by cutting the surface of the floor after the floor concrete is poured and hardened in the prior art.

[0096] In this embodiment, after the arrangement of the armored joint grid 2 and the sub-grid joint 4 grid is completed by the above method, a layout drawing of the armored joint grid 2 and the sub-grid joint 4 grid is drawn, the type, number, and position of the node-type armored joint 12 required for the concrete floor to be constructed are determined according to the layout drawing, and then the type, number, and position of the monomer-type armored joint 11 connected to the node-type armored joint 12 are determined; accurate basis is provided for subsequent processing and installation of the armored joint 1.

[0097] Specifically, the types of the node type armored joint 12 include, but are not limited to, a cross node armored joint 121, a T node armored joint 122, a Y node armored joint 123, an arc straight intersection node armored joint 124, and an L node armored joint 125. The types and the number of the node type armored joint 12 can be determined by the positions of the node type armored joint 12, and the size of the node type armored joint 12 can be designed as needed.

[0098] In a preferred embodiment, the node type armored joint 12 and the single type armored joint 11 are designed to be uniform standard sizes according to their types, which facilitates factory batch processing and later construction and installation.

[0099] S2, pre-processing armored joint 1;

[0100] According to the types and the number of the node type armored joint 12 and the single type armored joint 11, pre-processing is performed in the factory, and the node type armored joint 12 and the single type armored joint 11 are numbered according to their types and installation positions.

[0101] In a specific implementation, as shown in Figure 8 The armored joint 1 specifically includes a vertical compartment steel plate 1101, a force transmission steel plate 1102, a movable sleeve box 1103, a breakable bolt 1104, a guard edge steel plate 1105, an anchoring steel plate 1106, and a hollow reinforcing bar 1107. The two vertical compartment steel plates 1101 are arranged in parallel. The force transmission steel plate 1102 penetrates the two vertical compartment steel plates 1101 vertically and extends outward along the horizontal direction of the two vertical compartment steel plates 1101. The movable sleeve box 1103 is sleeved on one end of the force transmission steel plate 1102. The breakable bolt 1104 penetrates the two vertical compartment steel plates 1101. The guard edge steel plate 1105 is arranged at the upper end and the lower end of the vertical compartment steel plate 1101 along the length direction of the vertical compartment steel plate 1101 and extends outward from the vertical compartment steel plate 1101. One end of the anchoring steel plate 1106 is connected with the guard edge steel plate 1105, and the other end extends outward from the vertical compartment steel plate 1101 and is located between the two guard edge steel plates 1105, so that the anchoring steel plate 1106 is embedded in the concrete when the armored joint 1 is used. The hollow reinforcing bar 1107 is arranged outside the vertical compartment steel plate 1101 and adheres to the lower surface of the guard edge steel plate 1105 to strengthen the support of the guard edge steel plate 1105

[0102] In a specific embodiment, the force transmission steel plate 1102 is welded to one vertical compartment steel plate 1101, and the other vertical compartment steel plate 1101 is provided with an opening which is matched with the force transmission steel plate 1102, and the size of the opening is slightly larger than the cross-sectional size of the force transmission steel plate 1102, the force transmission steel plate 1102 passes through the opening and extends out of the vertical compartment steel plate 1101, and the extending end is sleeved with a movable sleeve box 1103; specifically, the movable sleeve box 1103 has a cavity, the depth and height of the cavity are the same as the length and thickness of the extending end of the force transmission steel plate 1102, and the width of the cavity is 20-40 mm larger than the width of the steel plate.

[0103] Preferably, the surface of the movable sleeve box 1103 is provided with stiffening ribs, and the distance from the force transmission steel plate 1102 to the two side walls of the cavity of the movable sleeve box 1103 in the length direction is the same.

[0104] In the embodiment, the breakable bolts 1104 are arranged in several columns along the height direction of the vertical compartment steel plate 1101 and in several rows along the length direction of the vertical compartment steel plate 1101, and the breakable bolts 1104 are broken when the tension force borne by the breakable bolts 1104 is greater than the tension bearing capacity thereof.

[0105] In use, the anchoring steel plate 1106 of the armored joint 1 extends into the concrete to firmly connect the two vertical compartment steel plates 1101 and the concrete on both sides of the armored joint 1; as the concrete pavements on both sides shrink, the two vertical compartment steel plates 1101 are driven away from each other, and the breakable bolts 1104 connecting the two vertical compartment steel plates 1101 are broken; at the same time, the vertical compartment steel plates 1101 drive the force transmission steel plate 1102 to move in the movable sleeve box 1103, without constraining the deformation of the concrete on both sides of the armored joint 1; in the use process of the concrete pavement, the pavement on both sides of the joint will be settled to different degrees when vehicles run on the upper part of the pavement and equipment is transported across the joint, which affects the normal use of the pavement. In the present application, the force transmission steel plate 1102 is installed across the pavement armored joint 1, which can effectively transmit the vertical load on both sides of the pavement, coordinate the deformation of the pavement when the pavement is settled, and make the concrete pavement have good integrity.

[0106] In the embodiment, the armored joint grid 2 includes several grid straight joints 21 and column edge joints 22, and the grid straight joints 21 and the column edge joints 22 each include an expansion joint 212 and a contraction joint 211; when the armored joint 1 is used for the contraction joint 211, the two vertical compartment steel plates 1101 are attached; when the armored joint 1 is used for the expansion joint 212, the two vertical compartment steel plates 1101 are provided with an extruded plate 1109 therebetween. The expansion joint 212 and the contraction joint 211 each include several connected single armored joints 11 and node armored joints 12, and two adjacent armored joints 1 are connected through a hollow reinforcing bar 1107 by a connecting piece 1108.

[0107] S3, measure the line;

[0108] According to the layout of the armored joint grid 2, measure and mark the installation position of the armored joint 1 on the concrete floor.

[0109] S3, on-site assembly of the armored joint 1: temporarily fix the armored joint 1 through the fixed support 6, first install the node type armored joint 12, and then install the single type armored joint 11 connected with the node type armored joint 12;

[0110] In this embodiment, the auxiliary installation tool is used for on-site assembly of the armored joint 1, and the level and the installation position of the armored joint 1 are measured by using the level and the laser line instrument, and the installation precision is continuously adjusted until the installation precision requirement is met. The auxiliary installation tool, the level and the laser line instrument can be purchased on the market.

[0111] In this embodiment, the armored joint 1 is temporarily fixed to the ground 7 through the fixed support 6, as shown in Figures 9-10 The fixed support 6 includes two parallel vertical rods 601 and a horizontal rod 602 and an inclined rod 603 connected with the two vertical rods 601 respectively; during installation, the fixed support 6 is installed on one side of the armored joint 1, the vertical rod 601 is buried in the ground 7, and one end of the horizontal rod 602 and the inclined rod 603 is welded to the vertical compartment steel plate 1101.

[0112] In this embodiment, the distance between the fixed supports 6 installed on the same side of the armored joint 1 is not greater than 750 mm, and the distance between the vertical rod 601 close to the armored joint 1 and the edge of the armored joint 1 anchoring steel plate 1106 is not greater than 100 mm, so that the fixed support 6 has good supporting effect.

[0113] In this embodiment, as shown in Figure 11 The adjacent armored joints 1 are connected through the connecting piece 1108; specifically, the connecting piece 1108 is inserted into the cavity of the hollow reinforcing bar 1107, after the first armored joint 1 is fixed through the fixed support 6, the other armored joint 1 is connected with the first armored joint 1 through the connecting piece 1108, and then the other armored joint 1 is fixed through the fixed support 6.

[0114] S4, binding the steel bars and pouring the concrete;

[0115] In this embodiment, before pouring the concrete, the temporary protective paper tape is pasted on the upper surface of the edge protection steel plate 1105 to prevent the edge protection steel plate 1105 from being contaminated by the mud; during pouring of the concrete, the side of the armored joint 1 without the fixed support 6 is poured first, after the concrete is hardened, the vertical rod 601 of the fixed support 6 installed on the other side of the armored joint 1 is cut off, and the concrete on this side is poured; the liquid surface of the concrete is flush with the upper edge of the armored joint 1 edge protection steel plate 1105.

[0116] Compared with the skip method, the construction method of the present application does not need to set an interval time, the concrete of adjacent sub-bay areas 3 can be continuously poured, the construction process is significantly simplified, the labor is effectively saved and the construction period is shortened; at the same time, the armored joint 1 can be used as a side formwork of each concrete floor unit, and after the concrete is poured, the armored joint 1 is embedded and connected on the concrete floor, without the need for removal, which significantly saves building materials, simplifies the construction process and saves labor.

[0117] S5, concrete finishing and leveling: removing the temporary protective tape, installing the screeding device 8 on the edge protection steel plate 1105, and starting the screeding device 8 for screeding operation;

[0118] In this embodiment, as shown in Figure 12 The screeding device is arranged on the upper surface of the edge protection steel plate 1105, and the edge protection steel plate 1105 serves as a guide rail for the screeding device 8, so that the screeding device 8 reciprocates along the edge protection steel plate 1105 for screeding operation. According to the concrete setting condition, first smoothing, second smoothing and manual processing are carried out to ensure that the flatness of the concrete floor meets the requirements.

[0119] Due to the high installation accuracy of the armored joint 1, the edge protection steel plate 1105 of the armored joint 1 is used as a precise guide rail for screeding construction during concrete pouring and leveling, which effectively improves the concrete finishing and leveling construction effect and meets the construction requirements of the flatness of the precision floor.

[0120] S5, cutting the grid joint 4;

[0121] In this embodiment, the grid joint 4 is cut within 12-48 hours after the concrete is poured. According to the grid joint 4 layout diagram, the grid joint 4 position is drawn on the surface of the concrete floor by using a cutting machine to cut the grid joint 4, the cutting width of the grid joint 4 is 3-5mm, and the cutting depth is 1 / 3 of the thickness of the concrete floor.

[0122] S6, concrete curing;

[0123] S7, filling the armored joint 1 and the grid joint 4.

[0124] In this embodiment, after the concrete strength meets the design requirements, the grid joint 4 is filled with cement mortar, and the contraction joint 211 is filled with flexible sealing paste.

[0125] The armored joint-based fine flat concrete floor construction method has the advantages that the single-body armored joint and the node-type armored joint are arranged, the column edge joint is additionally designed, the construction site rapid installation is realized, the construction efficiency is improved, the shrinkage joint and the expansion joint are reasonably arranged, the continuous pouring of the concrete is realized, the generation of the cracks is effectively controlled, the construction quality of the concrete floor is ensured, the construction period is further saved, the armored joint is used as the side formwork of the concrete pouring, the armored joint does not need to be removed, the process flow is obviously simplified, the edge protection steel plate of the armored joint is used as the guide rail of the scraping, the concrete finishing and the flat construction effect are effectively improved, and the construction requirement of the flatness of the fine flat floor is met.

[0126] The above detailed description of the embodiments of the present application is only a preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made according to the scope of the present application should still belong to the scope of the present application.

Claims

1. A method for constructing a precision-finished concrete floor slab based on the armoured joint, characterized in that: The armored joint grid is formed by armored joint splicing, which divides the concrete floor into several sub-areas, and the armored joint grid comprises shrink joints and expansion joints; the armored joint comprises vertical sub-area steel plates, and when the armored joint is used for the expansion joint, extruded plates are arranged between two vertical sub-area steel plates; the minimum number of expansion joints is determined by the following formula: ； [n] - minimum number of expansion joints; α - linear expansion coefficient of concrete; T - temperature difference between pouring temperature of the floor and annual maximum air temperature; l t — the length of the floor side; Δl x - the amount of compression deformation allowed for the extruded sheet used for the armoring seam; The armored joint comprises single armored joints and node armored joints which are prefabricated in a factory; the single armored joint comprises a straight single armored joint and an arc single armored joint; the node armored joint comprises several single armored joints, and comprises one or more of a cross-shaped node armored joint, a T-shaped node armored joint, a Y-shaped node armored joint, an arc-straight intersection node armored joint and an L-shaped node armored joint; The armored joint grid comprises multiple rows and columns of grid straight joints arranged parallel and perpendicular to the building wall; The armored joint grid further comprises column edge joints arranged around the building column, the column edge joint comprises several single armored joints and / or node armored joints, which divide the concrete floor around the column into independent sub-areas; the column edge joint comprises a rectangular column edge joint, a rhombic column edge joint or a circular column edge joint for a column arranged in the middle of the concrete floor, a half rectangular column edge joint, a half rhombic column edge joint or a half circular column edge joint for a column arranged at the side of the concrete floor, and a quarter rectangular column edge joint, a quarter rhombic column edge joint or a quarter circular column edge joint for a column arranged at the corner of the concrete floor.

2. The jointed mat based construction method according to claim 1, wherein: The spacing between the shrink joints is the minimum value of the maximum non-cracking sub-area length of the concrete floor, the building column grid spacing and 50 m.

3. The jointed mat based construction method according to claim 2, wherein: When arranging the armored joint grid, the minimum number of expansion joints is calculated, the expansion joints are arranged in the middle area of the concrete floor, and the length-width ratio of each sub-area is less than 1.

5.

4. The jointed mat based construction method according to claim 3, wherein: When the side length of the sub-area is greater than 6 m, a sub-grid joint is arranged in the sub-area.

5. The jointed mat based construction method according to claim 4, wherein: The armored joint comprises: The vertical sub-area steel plates, two of which are arranged in parallel; A force transmission steel plate which is fixed vertically to one vertical sub-area steel plate and movably passes through the other vertical sub-area steel plate, both ends of the force transmission steel plate extend out of the vertical sub-area steel plate in the horizontal direction; A movable sleeve box which is sleeved on one end of the force transmission steel plate movably passing through the vertical sub-area steel plate; A breakable bolt which connects two vertical sub-area steel plates; A cover steel plate which is arranged at the upper end and the lower end of the vertical sub-area steel plate in the length direction of the vertical sub-area steel plate and extends out of the vertical sub-area steel plate; An anchor steel plate which is connected to the cover steel plate at one end and extends out of the vertical sub-area steel plate at the other end and is located between two cover steel plates; A hollow reinforcing bar which is arranged outside the vertical sub-area steel plate and is attached to the lower surface of the cover steel plate; When the armored joint is used for the shrink joint, two vertical sub-area steel plates are attached; When the armored joint is used for the expansion joint, the extruded plate is arranged between two vertical compartment steel plates; Two armored joints are connected through a connecting piece and pass through the hollow reinforcing bar.

6. The jointed mat based construction method according to claim 5, wherein: The armored joint is fixed to the ground through a fixed support; the fixed support includes two parallel vertical rods and horizontal rods and inclined rods connecting the two vertical rods respectively; during installation, the fixed support is installed on one side of the armored joint, the vertical rods are embedded in the ground, and one end of the horizontal rods and the inclined rods is welded to the vertical compartment steel plate; after the concrete on the other side of the armored joint is poured, the vertical rods are cut off.

7. The jointed mat based construction method according to claim 6, wherein: After the concrete is poured, a screed device is arranged on the upper surface of the edge protection steel plate, and the screed device reciprocates along the edge protection steel plate to perform the screeding operation.

8. The jointed mat based construction method according to claim 7, wherein: When the concrete floor is constructed, the following steps are included: Arranging the armored joint grid and the compartment joint grid: determining the type, position and number of node type armored joints according to the armored joint grid arrangement drawing, and then determining the type, position and number of single type armored joints; Preprocessing the armored joint; Measuring and laying out; Assembling the armored joint on site and temporarily fixing it through a fixed support: first, install the node type armored joint, and then install the single type armored joint connected to the node type armored joint; Binding the reinforcement and pouring the concrete: before pouring the concrete, temporary protective tape is pasted on the upper surface of the edge protection steel plate to prevent the edge protection steel plate from being contaminated by mud; when pouring the concrete, the side of the armored joint without the fixed support is poured first, the vertical rods of the fixed support are cut off after the concrete hardens, and the concrete on the other side of the armored joint is poured; The concrete is finished and leveled: the temporary protective tape is removed, and a screed device is installed on the edge protection steel plate, and the edge protection steel plate is used as a guide rail to operate the screed device; Cutting the compartment joint; Curing the concrete; Sealing the armored joint and the compartment joint.

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