Bottom plate skip construction method for mass concrete

Abstract

The invention relates to a skip construction method for a mass concrete bottom plate. The skip construction method aims at improving the construction efficiency and the concrete quality. According to the method, a foundation raft is divided into three equal-thickness pouring layers in the thickness direction, and cells are divided in the length direction and the width direction. Transverse steel plates are arranged on the boundary of each grid and welded to form grids, cross-shaped vertical steel plates are arranged on the grids, and the grids are welded and connected to form an integral steel framework. And construction of each pouring layer is completed in three times through alternate warehouse pouring. According to the method, a post-cast strip is omitted, procedures are simplified, the construction efficiency is improved, the water stop performance and tensile strength of the concrete joint are enhanced by arranging the steel plate, it is ensured that the thickness of the mass concrete bottom plate is uniform, and the overall quality is improved. The size of each grid is smaller than 40 m, simultaneous pouring of non-adjacent grids is guaranteed through alternate bin pouring, and interlayer connection is enhanced through vertical steel plate design. The method is suitable for construction of mass concrete structures and has remarkable economic benefits and social benefits.

Description

Technical Field

[0001] The invention relates to the technical field of mass concrete construction, and in particular to a bottom plate skipping construction method for mass concrete. Background Art

[0002] In traditional large-volume concrete slab construction, continuous pouring or block pouring methods are usually used, which have some limitations. Continuous pouring may cause the internal temperature of the concrete to be too high, causing cracks and structural instability, while block pouring requires the setting of post-casting strips, which not only increases the complexity of construction, but may also cause the concrete joints at the post-casting strips to become a hidden danger of leakage. In addition, the existence of post-casting strips also makes it difficult to control the elevation during construction, affecting the uniformity and overall quality of the concrete slab.

[0003] In order to solve the above problems, technicians in this field have conducted a lot of research and practice to explore more efficient and reliable construction methods. However, the existing construction technology still has problems such as low construction efficiency and difficulty in ensuring concrete quality. Especially in the construction of large-volume concrete slabs, how to effectively control the temperature stress of concrete, improve construction efficiency, and ensure the stability and waterproof performance of the structure has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The present invention is proposed in this context, aiming to provide a new large-volume concrete floor skipping construction method, which eliminates the post-casting strip through innovative construction technology and structural design, simplifies the construction process, improves construction efficiency, and ensures the uniformity and overall quality of the concrete floor, thereby solving the deficiencies in the prior art. In order to solve the above problems, the present invention proposes a large-volume concrete floor skipping construction method, which is implemented by the following technical solutions:

[0005] A method for constructing a large-volume concrete floor slab by skipping storage comprises the following steps:

[0006] Step 1: Divide the foundation raft slab into a first pouring layer, a second pouring layer and a third pouring layer along the thickness direction according to the thickness of the foundation raft slab, and the thickness of the first pouring layer, the second pouring layer and the third pouring layer are equal;

[0007] Step 2: Divide the first pouring layer into first grids along the length and width directions according to the area of ​​the foundation raft, and number them respectively along their respective directions;

[0008] Step 3: Tie the first pouring layer with steel bars, arrange continuous transverse steel plates at the boundary of each first grid, and weld all the transverse steel plates at the intersection to form a grid-like transverse steel plate;

[0009] Step 4: a cross-shaped vertical steel plate is arranged on the upper surface of the horizontal steel plate of each first grid, the vertical steel plate and the horizontal steel plate are welded and connected together at the intersection, and the vertical steel plates of adjacent first grids are welded and connected so that all the horizontal steel plates and vertical steel plates are connected to form a whole, and the vertical steel plates are higher than the upper surface of the first pouring layer;

[0010] Step 5: Perform skip-casting on the first casting layer;

[0011] Step 6: After the first pouring layer is initially set, the second pouring layer is divided into second grids according to the vertical steel plates and numbered along their respective directions;

[0012] Step 7: Tie the second pouring layer with steel bars, arrange continuous transverse steel plates at the boundary of each second grid, weld all transverse steel plates at the intersection to form a grid-like transverse steel plate, and weld the transverse steel plate with the arranged vertical steel plate to form a whole;

[0013] Step 8: Arrange a cross-shaped vertical steel plate on the upper surface of the horizontal steel plate of each second grid, weld the vertical steel plate and the horizontal steel plate together at the intersection, and weld the vertical steel plates of adjacent second grids together, so that all the horizontal steel plates and vertical steel plates are connected to form a whole, and the vertical steel plates are higher than the upper surface of the second pouring layer;

[0014] Step nine, performing skip-casting on the second casting layer;

[0015] Step 10: After the second pouring layer is initially set, the third grid of the third pouring layer is divided according to the vertical steel plate and numbered along their respective directions;

[0016] Step 11: tie the third pouring layer with steel bars, arrange continuous transverse steel plates at the boundary of each third grid, weld all the transverse steel plates at the intersection to form a grid-like transverse steel plate, and weld the transverse steel plate with the arranged vertical steel plate to form a whole;

[0017] Step 12: Perform skip pouring on the third pouring layer to complete the base plate construction of large-volume concrete.

[0018] Furthermore, the length and width of each grid are both less than 40m.

[0019] Furthermore, the skip-bin pouring is specifically to pour the pouring layer twice according to the grids, and the grids of each pouring are not adjacent to the grids of other pouring.

[0020] Furthermore, the cross-shaped vertical steel plate includes two vertical steel plates, each of which is provided with a buckling groove at the intersection, and the two buckling grooves are arranged opposite to each other. After the two vertical steel plates are buckled, the joints are welded and connected.

[0021] Furthermore, the transverse steel plate is arranged at the midpoint of each casting layer in the thickness direction and is located between adjacent cells, and the height of the vertical steel plate is equal to the height of each casting layer.

[0022] Furthermore, the two ends of the transverse steel plate in the width direction are each provided with a downwardly inclined wing plate, and the vertical steel plate is a straight plate.

[0023] The bottom plate skipping construction method of the mass concrete of the present invention has the following significant beneficial effects:

[0024] (1) This construction method eliminates the need for post-casting joints and adopts a skip-bin construction method, which is very simple. It reduces the steel bar binding construction process of the post-casting joints and improves the construction efficiency of large-volume concrete slabs. At the same time, after eliminating the post-casting joints, the elevation of the post-casting part can be more intuitively controlled according to the already cast part of the adjacent grid, making the thickness of the large-volume concrete slab more uniform.

[0025] (2) By setting up the transverse steel plate, on the one hand, a water stop component can be formed at the concrete joint, and on the other hand, it can prevent the thermal expansion and contraction of the post-cast area from causing the edges of the concrete to curl up. At the same time, the downward-inclined wing plate is set so that the transverse steel plate can withstand the lateral tension, thereby improving the tensile strength between adjacent concrete blocks.

[0026] (3) By setting up vertical steel plates, water-stopping components can be formed between concrete layers. At the same time, the vertical steel plates are connected to the upper and lower horizontal steel plates respectively, so that all the steel plates form an integral steel skeleton. The vertical steel plates can withstand vertical tension through the horizontal steel plates, so that the three casting layers form a whole. As a result, the large volume of concrete can be divided into three casting layers for separate reinforcement binding, ensuring that the reinforcement binding, steel plate arrangement, and skip-bin casting construction of each casting layer are completed independently, reducing the obstruction of the casting and quality control of each casting layer due to the preset overall steel skeleton, and greatly improving the overall quality of the large volume of concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the first grid numbering of the present invention.

[0029] Figure 2 This is a schematic diagram of the first jump bin pouring in the first zone of the present invention.

[0030] Figure 3This is a schematic diagram of the second skip-bin pouring in the first zone of the present invention.

[0031] Figure 4 This is a schematic diagram of the first skip-bin pouring of the second zone of the present invention.

[0032] Figure 5 This is a schematic diagram of the second jump bin pouring in the second zone of the present invention.

[0033] Figure 6 This is a schematic diagram of the first skip-bin pouring of the third zone of the present invention.

[0034] Figure 7 This is a schematic diagram of the second skip-bin pouring in the third zone of the present invention.

[0035] Figure 8 It is a schematic diagram of the vertical steel plate structure of the present invention.

[0036] Description of reference numerals:

[0037] 100 - first pouring layer, 101 - second pouring layer, 102 - third pouring layer, 103 - first grid, 104 - second grid, 105 - third grid, 106 - horizontal steel plate, 107 - vertical steel plate, 108 - buckle groove. DETAILED DESCRIPTION

[0038] The following description of the embodiments will help the public better understand the present invention, but the specific embodiments given by the applicant cannot and should not be regarded as limitations on the technical solutions of the present invention. Any changes to the definitions of components or technical features, or formal rather than substantive changes to the overall structure should be regarded as the scope of protection defined by the technical solutions of the present invention.

[0039] In this application, unless otherwise clearly specified or limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements, or it can be only surface contact, or surface contact connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] Embodiment 1:

[0041] A method for constructing a large-volume concrete floor slab by skipping storage comprises the following steps:

[0042] Step 1: According to the thickness of the foundation raft slab, the first pouring layer 100, the second pouring layer 101 and the third pouring layer 102 are divided along the thickness direction, and the thickness of the first pouring layer 100, the second pouring layer 101 and the third pouring layer 102 are equal;

[0043] Step 2: Divide the first pouring layer 100 into first grids 103 along the length and width directions according to the size of the foundation raft slab area, wherein the length and width of each grid are both less than 40m and are numbered along their respective directions;

[0044] Step 3: Reinforce the first casting layer 100, arrange continuous transverse steel plates 106 at the boundary of each first grid 103, the transverse steel plates 106 are arranged at the midpoint of the first casting layer 100 in the thickness direction, and are located between adjacent first grids 103, the height of the vertical steel plates 107 is equal to the height of the first casting layer 100, and all transverse steel plates 106 are welded at the intersection to form a grid-like transverse steel plate 106;

[0045] Step 4: arrange a cross-shaped vertical steel plate 107 on the upper surface of the horizontal steel plate 106 of each first grid 103, the cross-shaped vertical steel plate 107 includes two vertical steel plates 107, each of the two vertical steel plates 107 is provided with a buckling groove 108 at the intersection, the two buckling grooves 108 are arranged opposite to each other, the two vertical steel plates 107 are buckled and welded to the seam, the vertical steel plates 107 and the horizontal steel plates 106 are welded and connected as a whole at the intersection, and the vertical steel plates 107 of adjacent first grids 103 are welded and connected, so that all the horizontal steel plates 106 and the vertical steel plates 107 are connected to form a whole, and the vertical steel plates 107 are higher than the upper surface of the first casting layer 100;

[0046] Step 5: Perform skip-casting on the first casting layer 100, and cast it twice according to the first grid 103, and the first grid 103 cast each time is not adjacent to the first grid 103 cast in other ways;

[0047] Step 6: After the first pouring layer 100 is initially set, the second pouring layer 101 is divided into second grids 104 according to the vertical steel plates 107 and numbered along their respective directions;

[0048] Step 7: The second casting layer 101 is reinforced with steel bars, and continuous transverse steel plates 106 are arranged at the boundary of each second grid 104. The transverse steel plates 106 are arranged at the midpoint of the second casting layer 101 in the thickness direction and are located between adjacent second grids 104. The height of the vertical steel plates 107 is equal to the height of the second casting layer 101. All transverse steel plates 106 are welded at the intersection to form a grid-like transverse steel plate 106, and the transverse steel plate 106 is welded with the arranged vertical steel plates 107 to form a whole.

[0049] Step eight, a cross-shaped vertical steel plate 107 is arranged on the upper surface of the horizontal steel plate 106 of each second grid 104, and the cross-shaped vertical steel plate 107 includes two vertical steel plates 107, and the two vertical steel plates 107 are each provided with a buckling groove 108 at the intersection, and the two buckling grooves 108 are arranged opposite to each other. After the two vertical steel plates 107 are buckled, the joints are welded and connected, and the vertical steel plates 107 and the horizontal steel plates 106 are welded and connected as a whole at the intersection, and the vertical steel plates 107 of adjacent second grids 104 are welded and connected, so that all the horizontal steel plates 106 and the vertical steel plates 107 are connected to form a whole, and the vertical steel plates 107 are higher than the upper surface of the second casting layer 101;

[0050] Step nine, performing skip-casting on the second casting layer 101, casting in two times according to the second grid 104, and each casting of the second grid 104 is not adjacent to other castings of the second grid 104;

[0051] Step 10: After the second pouring layer 101 is initially solidified, the third pouring layer 102 is divided into third grids 105 according to the vertical steel plates 107 and numbered along their respective directions;

[0052] Step 11: The third casting layer 102 is reinforced with steel bars, and continuous transverse steel plates 106 are arranged at the boundary of each third grid 105. The transverse steel plates 106 are arranged at the midpoint of the third casting layer 102 in the thickness direction and are located between adjacent third grids 105. All transverse steel plates 106 are welded at the intersection to form a grid-like transverse steel plate 106, and the transverse steel plate 106 is welded with the arranged vertical steel plates 107 to form a whole.

[0053] Step 12: Perform skip pouring on the third pouring layer 102, pouring twice according to the third grid 105, and each pouring of the third grid 105 is not adjacent to other pouring of the third grid 105, so as to complete the construction of the base plate of the large volume concrete.

[0054] In addition, the two ends of the transverse steel plate 106 along the width direction are each provided with a downwardly inclined wing plate, and the vertical steel plate 107 is a straight plate.

[0055] Those skilled in the art should understand that those skilled in the art can implement variations by combining the prior art and the above embodiments, which will not be described in detail here. Such variations do not affect the essential content of the present invention, and will not be described in detail here.

[0056] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A method for constructing a large-volume concrete floor slab jump-out, characterized in that: The following steps are involved: Step 1: dividing the foundation raft slab into a first pouring layer (100), a second pouring layer (101) and a third pouring layer (102) along the thickness direction according to the thickness of the foundation raft slab, wherein the thicknesses of the first pouring layer (100), the second pouring layer (101) and the third pouring layer (102) are equal; Step 2: Divide the first pouring layer (100) into first grids (103) along the length and width directions according to the area of ​​the foundation raft slab, and number them respectively along the respective directions; Step 3: Reinforcement binding is performed on the first casting layer (100), and continuous transverse steel plates (106) are arranged at the boundary of each first grid (103), and all transverse steel plates (106) are welded at the intersection to form a grid-like transverse steel plate (106); Step 4: a cross-shaped vertical steel plate (107) is arranged on the upper surface of the horizontal steel plate (106) of each first grid (103); the vertical steel plate (107) and the horizontal steel plate (106) are welded together at the intersection; the vertical steel plates (107) of adjacent first grids (103) are welded together, so that all the horizontal steel plates (106) and vertical steel plates (107) are connected to form a whole, and the vertical steel plates (107) are higher than the upper surface of the first casting layer (100); Step 5, performing skip-casting on the first casting layer (100); Step 6: After the first pouring layer (100) is initially set, the second pouring layer (101) is divided into second grids (104) according to the vertical steel plates (107), and the grids are numbered along their respective directions; Step 7: The second pouring layer (101) is reinforced with steel bars, and continuous transverse steel plates (106) are arranged at the boundary of each second grid (104). All transverse steel plates (106) are welded at the intersection to form a grid-like transverse steel plate (106), and the transverse steel plate (106) is welded with the arranged vertical steel plates (107) to form a whole. Step 8: a cross-shaped vertical steel plate (107) is arranged on the upper surface of the horizontal steel plate (106) of each second grid (104); the vertical steel plate (107) and the horizontal steel plate (106) are welded together at the intersection; the vertical steel plates (107) of adjacent second grids (104) are welded together, so that all the horizontal steel plates (106) and vertical steel plates (107) are connected to form a whole, and the vertical steel plates (107) are higher than the upper surface of the second casting layer (101); Step nine, performing skip-casting on the second casting layer (101); Step 10: After the second pouring layer (101) is initially set, the third pouring layer (102) is divided into third grids (105) according to the vertical steel plates (107), and numbered along their respective directions; Step 11: The third pouring layer (102) is reinforced with steel bars, and continuous transverse steel plates (106) are arranged at the boundary of each third grid (105). All transverse steel plates (106) are welded at the intersection to form a grid-like transverse steel plate (106), and the transverse steel plate (106) is welded with the arranged vertical steel plates (107) to form a whole. Step 12: Perform skip-casting on the third pouring layer (102) to complete the construction of the large-volume concrete base plate.

2. The bottom slab skipping construction method of mass concrete according to claim 1 is characterized in that: The length and width of each grid are less than 40m.

3. The bottom slab skipping construction method of mass concrete according to claim 1 is characterized in that: The skip-bin pouring specifically involves pouring the pouring layer twice according to the grids, and the grids of each pouring are not adjacent to the grids of other pouring.

4. The bottom slab skipping construction method of mass concrete according to claim 1 is characterized in that: The cross-shaped vertical steel plate (107) comprises two vertical steel plates (107), each of the two vertical steel plates (107) is provided with a buckling groove (108) at the intersection, the two buckling grooves (108) are arranged opposite to each other, and the two vertical steel plates (107) are buckled and then welded to the seam.

5. The bottom slab skipping construction method of mass concrete according to claim 1 is characterized in that: The transverse steel plate (106) is arranged at the midpoint of each casting layer in the thickness direction and is located between adjacent cells. The height of the vertical steel plate (107) is equal to the height of each casting layer.

6. The bottom slab skipping construction method of mass concrete according to claim 1, characterized in that: The two ends of the transverse steel plate (106) in the width direction are each provided with a downwardly inclined wing plate, and the vertical steel plate (107) is a straight plate.

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