Cement fiberboard lattice beam and construction method thereof

Abstract

The application discloses a cement fiber plate lattice beam and a construction method thereof, which comprises a beam body, a panel arranged on the side of the beam body, and a support arranged at the end of the beam body and used for connecting the beam body and a main body, the beam body comprises a transverse connecting rod, flat frames arranged in parallel and at intervals and connected through the transverse connecting rod, and two line skeleton frames arranged on the upper and lower parts of the outer side of one of the flat frames, the support comprises an angle steel with one surface being in contact with the transverse connecting rod and the other surface being in contact with the main body, the angle steel is welded with the transverse connecting rod, and the other surface is sequentially penetrated through the angle steel and the main body through chemical bolts and is fixed through nuts; in the application, the flat frames connected through the transverse connecting rod and the line skeleton frames are arranged, the self weight of the cement fiber lattice beam is reduced without affecting the bearing strength of the cement fiber lattice beam, in addition, the assembly type construction method can be constructed after the construction of the main body structure is completed, and the overall construction progress is not affected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a cement fiber board lattice beam and a construction method thereof. BACKGROUND

[0002] At present, most of the residential buildings in China have a "H" shape in plan, and a coupling beam (not under stress) is arranged between the two house types of the same side. Since the coupling beam is not arranged on each floor, the floor with the coupling beam becomes a "non-standard floor", which needs to be separately supported. In order to form the beam in one time, a cantilevered I-beam is usually used as the landing point of the formwork support system in the construction measures, and a steel pipe support system and a formwork are arranged on the cantilevered I-beam. The construction process is complex. After the support system and the I-beam are removed, holes need to be filled in the protruding wall. Some methods are used to construct the pre-embedded part, weld the box beam structure, spray paint on the box beam, or install dry-hanging aluminum plate, aluminum-plastic plate and other methods to spray paint on the steel truss. The disadvantages of these methods are that the thermal expansion coefficients of the paint and the base material are quite different, the paint on the beam is easy to fall off after spraying, the overall weight of the steel box beam is large, the installation is difficult, and there are safety hazards of high-altitude falling objects and quality hazards of paint falling.

[0003] In order to solve the above problems, the present application provides a cement fiber board lattice beam and a construction method thereof to solve the problem of the heavy weight of the previous lattice beam and the inconvenience of installation. SUMMARY

[0004] The purpose of the present application is to provide a cement fiber board lattice beam and a construction method thereof, which can reduce the self-weight of the cement fiber lattice beam without affecting the bearing strength of the cement fiber lattice beam.

[0005] To achieve the above purpose, the present application provides the following solutions:

[0006] A cement fiber board lattice beam, comprising a beam body, a panel arranged on the side of the beam body, and a support arranged at the end of the beam body for connecting the beam body and the main body, wherein the beam body comprises a transverse connecting rod, a plurality of flat frames arranged in parallel and at intervals through the transverse connecting rod, and two line skeletons arranged on the outer side of one of the flat frames at the upper and lower parts, and the support comprises an angle steel with one surface abutting against the transverse connecting rod and the other surface abutting against the main body, the angle steel is welded with the transverse connecting rod, and the other surface penetrates the angle steel and the main body in sequence through chemical bolts and is fixed through nuts.

[0007] Preferably, the flat frame comprises upper chord rods, transverse rods and lower chord rods arranged in parallel and at intervals in sequence, and a plurality of vertical rods connecting the upper chord rods, the transverse rods and the lower chord rods, and the vertical rods are arranged in sequence and at intervals along the direction of the upper chord rods.

[0008] Preferably, diagonal braces are arranged between the upper chord, the vertical posts and the crossbars, and between the lower chord, the vertical posts and the crossbars.

[0009] Preferably, the line skeleton at the upper part of the flat frame comprises a long angle iron arranged on the flat frame and along the upper chord, and a square frame arranged on the angle iron, the square frame comprising four line crossbars arranged along the upper chord, the upper line crossbar near the upper chord being welded to the upper chord, the lower line crossbar near the upper chord being welded to one side of the long angle iron, adjacent line crossbars being connected by connecting rods, and the line skeleton at the lower part of the flat frame being symmetrically arranged with the line skeleton at the upper part of the flat frame.

[0010] Preferably, the line skeleton is a square hollow tube with a cross section of 25 mm.

[0011] Preferably, the top surface of the upper line crossbar near the upper chord is flush with the top surface of the upper chord.

[0012] Preferably, the panels are fixedly connected to the upper chord, the crossbars, the vertical posts and the lower chord by galvanized self-tapping screws at a spacing of no more than 200 mm.

[0013] Preferably, the panels are cement fiber boards with a thickness of 8 mm, 10 mm or 12 mm.

[0014] A construction method of a cement fiber board lattice beam, comprising the following steps:

[0015] Pre-fabricating the upper chord, the lower chord, the crossbars and the vertical posts, welding the vertical posts at intervals between the upper chord and the lower chord, welding the crossbars at one half of the interval between the upper chord and the lower chord, and then welding the diagonal braces;

[0016] Pre-fabricating the line skeleton and welding and installing the same;

[0017] Installing the panels;

[0018] Installing the cement fiber board lattice beam on the main body.

[0019] Preferably, when the panels are installed, the joints between the panels are reinforced by a fiberglass mesh, and are pasted with water-resistant glue, and extend at least 250 mm to both sides of the joints.

[0020] The present application has the following technical effects relative to the prior art:

[0021] 1. The present application achieves the purpose of reducing the self-weight of the cement fiber lattice beam without affecting the load-bearing strength of the cement fiber lattice beam by setting the flat frame connected by the transverse connecting rod and the linear skeleton.

[0022] 2. The paint and the cement fiber board are tightly bonded in the present application, and the paint is not easy to fall off after setting. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present application or prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] ATTACHMENT Figure 1 It is a schematic diagram of the mounting structure of the present application;

[0025] ATTACHMENT Figure 2 It is a front view of the present application;

[0026] ATTACHMENT Figure 3 It is a schematic diagram of the structure of the present application;

[0027] ATTACHMENT Figure 4 Schematic diagram of panel mounting structure;

[0028] ATTACHMENT Figure 5 Structure side view of the present application;

[0029] ATTACHMENT Figure 6 It is a schematic diagram of the mounting structure of the present application and the main body;

[0030] Wherein, 1, top chord; 2, cross bar; 3, bottom chord; 4, vertical rod; 5, diagonal brace; 6, cement fiber board; 7, galvanized self-tapping screw; 8, transverse connecting rod; 9, linear skeleton vertical rod; 9a, linear cross bar; 9b, connecting rod; 10, long angle iron; 11, support angle iron; 12, chemical bolt; 12a, nut; 13, main body. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] The cement fiber plate lattice beam and the construction method thereof can reduce the self weight of the cement fiber lattice beam without affecting the bearing strength of the cement fiber lattice beam.

[0033] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0034] Reference Figures 1 to 6 The cement fiber plate lattice beam comprises a beam body, a panel arranged on the side of the beam body, and a support arranged at the end of the beam body for connecting the beam body and the main body. The beam body comprises a transverse connecting rod, flat frames arranged in parallel and at intervals through the transverse connecting rod, and two line skeleton frames arranged on the upper and lower parts of the outer side of one of the flat frames. The support comprises an angle steel with one surface being in contact with the transverse connecting rod and the other surface being in contact with the main body. The angle steel is welded with the transverse connecting rod, and the other surface is sequentially penetrated through the angle steel and the main body by chemical bolts and fixed by nuts. In the present application, the flat frames and the line skeleton frames connected by the transverse connecting rod are arranged in the above-mentioned manner, so that the self weight of the cement fiber lattice beam is reduced without affecting the bearing strength of the cement fiber lattice beam. In addition, the assembly type construction method can be constructed after the completion of the main body structure construction, without affecting the overall construction progress.

[0035] Reference Figure 3 The flat frame comprises upper chord rods, transverse rods and lower chord rods arranged in parallel and at intervals in sequence, and a plurality of vertical rods connecting the upper chord rods, the transverse rods and the lower chord rods. The vertical rods are arranged in sequence and at intervals along the direction of the upper chord rods.

[0036] Reference Figures 2 to 3 In the present application, the flat frames and the line skeleton frames connected by the transverse connecting rod are arranged in the above-mentioned manner, so that the self weight of the cement fiber lattice beam is reduced without affecting the bearing strength of the cement fiber lattice beam. In addition, the assembly type construction method can be constructed after the completion of the main body structure construction, without affecting the overall construction progress.

[0037] Reference Figure 3 The line skeleton frame located at the upper part of the flat frame comprises long angle irons arranged on the flat frame and along the direction of the upper chord rods, and square frames arranged on the angle irons. The square frame comprises four line transverse rods arranged along the direction of the upper chord rods. The upper line transverse rod close to the upper chord rod is welded with the upper chord rod, and the lower line transverse rod close to the upper chord rod is welded with one surface of the long angle iron. Adjacent line transverse rods are connected by connecting rods. The line skeleton frame located at the lower part of the flat frame is arranged symmetrically with the line skeleton frame located at the upper part of the flat frame.

[0038] Further, the line skeleton frame is a square hollow square tube with a cross section of 25mm.

[0039] Furthermore, the top surface of the upper horizontal bar near the upper chord is flush with the top surface of the upper chord.

[0040] Furthermore, the panel is fixedly connected to the upper chord, horizontal bar, vertical bar and lower chord by galvanized self-tapping screws at intervals not exceeding 200mm.

[0041] Furthermore, the panel is made of cement fiberboard, and the thickness of the cement fiberboard is 8mm, 10mm, or 12mm.

[0042] A construction method for a cement fiberboard lattice beam includes the following steps:

[0043] To fabricate the lattice beams, hot-dip galvanized square tubing is used, typically 40*40mm in size with a wall thickness of 1.5mm. The top and bottom chords are slightly cambered during fabrication, with the camber height being three-thousandths of the beam span. Vertical members are welded at regular intervals between the top and bottom chords. Horizontal members are then welded at half the beam height, followed by diagonal bracing. The resulting "X"-shaped facade completes one truss. The second truss is then fabricated using the same method. Horizontal connecting rods are welded together according to the beam width, with these connecting rods positioned at the connection points between the top and bottom chords and vertical members, as well as at the connection points between horizontal members and vertical members. After overall welding, the welds are ground smooth and then treated with anti-rust paint.

[0044] To construct the structural framework, first lay out the lines at the lattice beam lines, specifically the lower edge of the upper lines and the upper edge of the lower lines. Mark a line with ink, then install and weld long angle iron along the right-angled edge of the ink line, with a length equal to the beam length. Next, assemble and weld the small square tube uprights and connecting rods of the structural framework onto the lattice beam at regular intervals. Weld one end to the upper chord (or lower chord) and the other end to the long angle iron. After welding, weld the horizontal structural members.

[0045] To install cement fiberboard, cut the board according to the positions marked on the vertical members. Secure the cement fiberboard sections to the upper chord, lower chord, vertical members, and horizontal members using galvanized self-tapping screws (the cement fiberboard on one side of each end of the lattice beam must be installed after the supports are installed). The screw spacing should not exceed 200mm. For areas with linear moldings, due to the presence of long angle irons with a certain thickness, the overlapping portion of the cement fiberboard and angle iron needs to be sanded. Mark the overlapping area with a chalk line, then sand the marked area with a grinder to the same thickness as the angle iron. Sanding should be even, resulting in a smooth surface without obvious protrusions. Galvanized self-tapping screws are also needed to secure the cement fiberboard at overlapping sections, with a spacing not exceeding 200mm. The self-tapping screws should be screwed in and penetrate 2mm into the surface of the cement fiberboard.

[0046] Lofting and support positioning, spacing physical measurement at the installation site, electronic theodolite or total station can be used for main structure verticality observation calculation or high altitude physical measurement. If there is error in the main structure, the structure needs to be chiseled or polished. Lofting is carried out at the installation position, and the beam section contour and chemical bolt installation position are popped out with ink line as the basis for installation positioning. Drilling and hole blowing (hole cleaning) are carried out at the chemical bolt mark.

[0047] Install the cement fiber plate lattice beam. Two methods can be used when hoisting, one is to weld lifting lugs on the lattice beam, and then cut them off after construction is completed. The second is to use soft flat lifting ropes to hoist the beam body from bottom to top. Hoist to the predetermined installation position, install the angle iron with drilled holes at the lower part of the transverse connecting rod at both ends of the lattice beam, and check whether the position of the hole is consistent with the position of the hole drilled on the main structure. After checking that there is no error, weld and install the angle iron. The hole diameter of the angle iron is one size larger than the diameter of the chemical bolt, and the length of the angle iron is slightly shorter than the transverse connecting rod. Install the chemical bolt at the drilling position. According to the characteristics of the chemical bolt, it can reach the strength within 30 minutes after being implanted. Therefore, the installation sequence should be symmetrical installation, from top to bottom, which can reduce the high-altitude operation time. After the chemical bolt reaches the strength, the nut is tightened together with the angle iron to fix it. Finally, the reserved cement fiber plates at both ends are fixed on the lattice beam with self-tapping screws. The gaps between the plates and the main structure are filled with foaming agent first, and the surface part is filled with building glue or sealant. The self-tapping screws are screwed into the 2mm deep part of the cement fiber plate, which is also filled with building glue or sealant.

[0048] Glass fiber mesh is also used to reinforce the joints between the plates, and water-resistant adhesive is used for pasting, with each side extending 250mm, to prevent cracks after painting and decoration. After the installation of the glass fiber mesh is completed, the outer wall putty construction and painting operation can be carried out.

[0049] Any adaptive changes made according to actual needs are within the scope of the present application.

[0050] It should be noted that for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the application. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A cement fiber panel lattice beam, characterized by, The beam body includes a transverse connecting rod, parallel and spaced flat frames connected by the transverse connecting rod, and two linear skeleton frames arranged on the upper and lower parts of the outer side of one of the flat frames; the support includes an angle steel with one surface adhering to the transverse connecting rod and the other surface adhering to the main body, the angle steel is welded to the transverse connecting rod, and the other surface penetrates the angle steel and the main body in sequence through chemical bolts and is fixed by nuts; The flat frame includes upper chord, transverse rod and lower chord arranged in sequence and spaced in parallel, and a plurality of vertical rods connecting the upper chord, transverse rod and lower chord, the vertical rods are arranged in sequence and spaced along the direction of the upper chord; diagonal braces are arranged between the upper chord, vertical rods and the transverse rod, and between the lower chord, vertical rods and the transverse rod; The linear skeleton frame located on the upper part of the flat frame includes a long angle iron arranged on the flat frame and along the direction of the upper chord, and a square frame arranged on the angle iron, the square frame includes four linear transverse rods arranged along the direction of the upper chord, the upper linear transverse rod close to the upper chord is welded to the upper chord, the lower linear transverse rod close to the upper chord is welded to one surface of the long angle iron, adjacent linear transverse rods are connected by connecting rods, and the linear skeleton frame located on the lower part of the flat frame is symmetrically arranged with the linear skeleton frame located on the upper part of the flat frame; The panel is a cement fiber board, and the thickness of the cement fiber board is 8mm, 10mm or 12mm; The cement fiber board is cut according to the positions divided by the vertical rods, and the cement fiber board is fixed in blocks on the upper chord, lower chord, vertical rods and transverse rod by galvanized self-tapping screws, and the screw spacing is not greater than 200mm.

2. A cement-fiber sheet lattice beam according to claim 1, characterized in that, The linear skeleton frame is a square hollow tube with a cross section of 25mm.

3. The cement fiber board lattice beam according to claim 1, wherein, The top surface of the upper linear transverse rod close to the upper chord is flush with the top surface of the upper chord.

4. A method of constructing a cement fiberboard lattice beam, characterized by, The cement fiber board lattice beam applied to any one of claims 1-3 comprises the following steps: The upper chord, lower chord, transverse rod and vertical rod are prefabricated, the vertical rods are welded and spaced between the upper chord and the lower chord, the transverse rod is welded at one half of the spacing between the upper chord and the lower chord, and then the diagonal braces are welded; The linear skeleton frame is prefabricated and welded and installed; The panel is installed; The cement fiber board lattice beam is installed on the main body.

5. The method of claim 4, wherein the cement fiberboard lattice beam is constructed by the steps of: When the panel is installed, the joints between the panels are reinforced by fiberglass mesh, and are pasted with water-resistant glue, and extend at least 250mm to both sides of the joints.

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