Special-shaped steel mould structure for rapid construction of duct piece plant foundation

Abstract

The utility model discloses a special-shaped steel mold structure for rapid construction of a duct piece plant foundation. The problems that the utilization rate is low and the pouring quality is low due to the fact that an existing duct piece plant adopts wood mold plates are solved. The mold comprises a mold body, the mold body is of a detachable structure, a cover plate is arranged above the mold body, and the cover plate is of a structure for fixing a plurality of embedded bolts; the die body comprises an upper die and a lower die which are connected through a gradual change part, and the sectional area of the upper die is smaller than that of the lower die.

Description

Technical Field

[0001] The utility model relates to the technical field of plant building construction, in particular to a special-shaped steel mold structure used for rapid construction of a segment plant foundation. Background Art

[0002] Segments are mainly used in rail transit, urban construction, water conservancy projects, bridges and tunnels. They are high-precision prefabricated concrete components and the main body of the tunnel structure. They need to withstand external soil pressure, groundwater pressure and various dynamic load impacts in the tunnel. Their quality is directly related to the overall safety of the tunnel. Reinforced concrete segments have a certain strength, are easy to process and manufacture, are corrosion-resistant, and have a low cost. They are the most commonly used segment form, but they are relatively heavy and easily damaged during transportation and installation. They often need to be constructed near the project construction area.

[0003] The segment prefabrication plant covers a large area and has a complex structure. It is mainly composed of segment plant buildings, sand and gravel crushing stations, concrete mixing stations, segment production workshops, test facilities, water curing pools, stacking sites, gantry cranes, auxiliary production facilities, office areas, etc. The construction of a segment plant generally takes 6 to 10 months, and the construction period is long.

[0004] However, due to the long construction period and high construction cost of the segment factory, the conventional wooden formwork foundation construction is slow, the casting quality and appearance quality cannot be guaranteed, and the utilization rate is low and the turnover number is small, it often becomes an important factor hindering the rapid construction of the project segment factory. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a special-shaped steel formwork structure for the rapid construction of the foundation of the segment plant, which effectively solves the problem of low utilization rate and poor casting quality caused by the use of wooden membrane panels in the current segment plant.

[0006] To achieve the above object, the technical solution of the utility model is: a special-shaped steel membrane structure for rapid construction of a segment plant foundation, comprising a mold body, the mold body is a detachable structure, a cover plate is arranged above the mold body, and the cover plate is a structure for fixing a plurality of embedded bolts;

[0007] The mold body comprises an upper mold and a lower mold, the upper mold and the lower mold are connected via a gradient portion, and the cross-sectional area of ​​the upper mold is smaller than the cross-sectional area of ​​the lower mold.

[0008] Preferably, the upper mold and the lower mold are both rectangular structures.

[0009] Preferably, the embedded bolts penetrate the cover plate.

[0010] Preferably, two cover plates are provided, and nuts are provided on the upper and lower sides of each cover plate, the nuts are threadedly connected with the embedded bolts, and the cover plates are limited and fixed by the two nuts.

[0011] Preferably, a plurality of vibration holes are provided on the gradient portion.

[0012] Preferably, the mold body comprises a front half and a rear half, each of which occupies half of the mold body and is connected via a locking device.

[0013] Preferably, the front half and the rear half are both L-shaped structures.

[0014] Preferably, the locking device comprises expansion plates fixedly connected to the front half and the rear half respectively, and the two expansion plates are detachably connected.

[0015] Preferably, the two expansion plates are connected via a bolt group.

[0016] Preferably, lifting ears are installed on both sides of the mold body.

[0017] Through the production of this special-shaped steel formwork structure, the construction time of the column foundation of the segment plant can be effectively saved. The steel formwork is easy to install, the embedded parts and the steel cage are firmly fixed, and the pouring process can effectively bear the weight of the concrete and avoid damage to the formwork by vibration. The formwork is quick to remove. Before each pouring, the concrete residue on the steel formwork is thoroughly cleaned and removed, and the particles and dust are blown away with compressed air. When cleaning and washing the steel formwork surface in contact with concrete, it is strictly forbidden to use hammers or scissors to prevent damage to the steel formwork surface, and the interface agent or release agent is applied to the steel formwork. The pouring foundation molding quality is good, without honeycombs, pits and misalignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the shaft side structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the mold body structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the axial structure of the mold body of the utility model;

[0022] In the figure: 1. mold body; 2. cover plate; 3. upper mold; 4. lower mold; 5. gradient part; 6. vibration hole; 7. expansion plate. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] Please refer to Figure 1-4 During the construction of the factory building, including the construction of the cushion layer: the excavation of the column foundation should be carried out strictly according to the design requirements, and no over-excavation is allowed. The surrounding load should not exceed the design requirements. The foundation should be sealed to prevent water immersion and exposure, and the underground structure should be constructed in time. The foundation cushion layer is 10cmC15 plain concrete. The foundation base height is determined by the actual on-site measurement of the absolute elevation and reference to the geological survey report. The cushion layer is leveled to facilitate the binding of steel bars and the fixing of the formwork.

[0026] Installation of steel bars and embedded parts: The column foundation steel bars are Φ20mm, the stirrups are Φ12mm ribbed steel bars, the steel bar protection layer (starting from the outer edge of the steel bar), the foundation is 40mm, the ring is 30mm, and the foundation short column is 35mm. The elevation of each component needs to be checked according to the determined elevation. The size and positioning of the column foot anchor bolts must be checked during the construction of the foundation short column. There are 12 M39 embedded bolts in each foundation. The anchor bolts are made of Q235B and are fastened with double nuts. The nuts and anchor bolt pads should be fixed and fastened.

[0027] Installation and fixation of special-shaped steel formwork structure: After the reinforcement of the column is tied, the reinforcement binding should be checked. The position of the reinforcement is accurate, the binding is firm, the position of the reinforcement joints, the lap length, the thickness of the protective layer, etc. meet the requirements, and the construction is strictly carried out according to the drawings. After acceptance, the special-shaped steel formwork is installed. There are lifting ears on both sides of the steel formwork, which are hoisted by a car crane, measured and accurately positioned, and the bottom of the steel formwork is fixed with a steel pipe to prevent the bottom from running during the pouring process. The short column part is fixed with the stud bolts of the original embedded parts combined with the processed 5mm steel plate.

[0028] Concrete pouring for column foundation: After the special-shaped steel formwork structure is installed and fixed, the technical personnel will provide on-site guidance to ensure the accuracy and efficiency of the installation and reinforcement. After confirmation, they will contact the mixing station to control the C40 concrete. During construction, the interval between the next layer of concrete and the previous layer must be no more than 1.5 hours, and it must be strictly controlled within the initial setting time of the concrete. The concrete is vibrated from the vibration holes 6 set around the special-shaped steel formwork. The vibration starts from the bottom and gradually moves upward. The vibration height does not exceed 50cm each time. After the concrete is poured and formed, the elevation and flatness are controlled with an iron roller and a long scraper before the initial setting. Finally, the surface is smoothed with a trowel and maintenance is carried out in a timely manner.

[0029] Dismantle the formwork. After the concrete strength reaches the design requirement, start dismantling the steel formwork. First remove the nuts and pads on the top. Use the locking mechanisms on both sides of the lower steel formwork to remove the bolt groups on the steel plates. Divide the special-shaped steel formwork into two parts and use a crane to connect the upper lifting ears for overall lifting. During the lifting process, pay attention to avoid damage to the surface of the poured concrete.

[0030] Through the production of this special-shaped steel formwork structure, the construction time of the column foundation of the segment plant can be effectively saved. The steel formwork is easy to install, the embedded parts and the steel cage are firmly fixed, and the pouring process can effectively bear the weight of the concrete and avoid damage to the formwork by vibration. The formwork is quick to remove. Before each pouring, the concrete residue on the steel formwork is thoroughly cleaned and removed, and the particles and dust are blown away with compressed air. When cleaning and washing the steel formwork surface in contact with concrete, it is strictly forbidden to use hammers or scissors to prevent damage to the steel formwork surface, and the interface agent or release agent is applied to the steel formwork. The pouring foundation molding quality is good, without honeycombs, pits and misalignment.

[0031] The special-shaped steel membrane structure used for the rapid construction of the foundation of the segment plant comprises a mold body 1, the mold body 1 is a detachable structure, a cover plate 2 is arranged above the mold body 1, and the cover plate 2 is a structure for fixing a plurality of embedded bolts;

[0032] The mold body 1 includes an upper mold 3 and a lower mold 4 . The upper mold 3 and the lower mold 4 are connected via a gradient portion 5 . The cross-sectional area of ​​the upper mold 3 is smaller than that of the lower mold 4 .

[0033] In the present device, the upper mold 3 and the lower mold 4 are both rectangular structures, and both are structures with upper and lower openings. The upper mold 3 and the lower mold 4 are gradually connected, which conforms to the mechanical structure.

[0034] By setting up the column foundation, the column foundation pre-embeds the bolt base in advance, cooperates with the pre-embedded 12 M39 bolts, and fixes the bolts to the cover plate 2, so as to ensure the installation accuracy of multiple pre-embedded bolts and ensure that the pre-embedded bolts do not shake.

[0035] At the same time, the entire mold body 1 is a detachable structure, which is divided into two parts, so that after the pouring is completed, it is convenient to remove the mold and facilitate subsequent pouring.

[0036] There are two cover plates 2, and nuts are provided on the upper and lower sides of each cover plate 2. The nuts are threadedly connected with the embedded bolts, and the cover plate 2 is limited and fixed by the two nuts.

[0037] The cover plate 2 is annular in structure, which makes it convenient to pour concrete into the steel mold. Each cover plate 2 is clamped by two nuts, which can limit the position of the cover plate 2. At the same time, there are two cover plates 2, which can highly ensure the installation accuracy of multiple embedded bolts.

[0038] The gradient portion 5 is provided with a plurality of vibration holes 6 .

[0039] The concrete is vibrated through the vibrating holes 6 .

[0040] The mold body 1 includes a front half and a rear half, each of which occupies half of the mold body 1 and is connected via a locking device.

[0041] The front half and the back half have the same structure, both including the upper mold 3, the gradient part 5 and half of the lower mold 4. The front half and the back half are connected together by a locking device to form the entire mold body 1, so that after casting is completed, it is convenient to remove the mold and hoist it.

[0042] The locking device comprises an expansion plate 7 fixedly connected to the front half and the rear half respectively, and the two expansion plates 7 are detachably connected to each other.

[0043] In the present device, the locking device adopts the position where the front half and the rear half are connected, and the expansion plates 7 are fixed respectively, and the two expansion plates 7 are connected by a bolt group, which is convenient and fast. Specifically, the expansion plates 7 are arranged on the upper mold 3 and the lower mold 4, and the upper mold 3 and the lower mold 4 are conveniently fixed together. After the upper and lower ends are fixed together, the corresponding gradient part 5 will also be fixed together.

[0044] Of course, the locking device can also be configured in such a way that the threaded rod is threadedly connected on the front half, and a locking block is provided on the rear half, and the threaded rod is slidably inserted into the locking block, thereby fixing the two together.

[0045] There are 150 column foundations in the segment factory. According to the workers' proficiency, the speed of tying steel bars and the speed of pouring concrete, 6 sets of special-shaped steel molds are processed. According to the design drawings and detailed drawings of the steel molds, the required materials are prepared in advance, and highly skilled welders are selected for welding. In order to avoid large processing errors of each part, a set of samples need to be processed first for column formwork. The steel molds, embedded parts and steel cages should not interfere with each other, and meet the requirements of the protective layer of the steel bars. After pouring a column foundation, the deviation between the actual size of the column foundation and the design size and the verticality of the embedded bolts are measured. After all items meet the requirements, batch processing of another 5 sets will be started.

[0046] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" that may appear 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 the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the term "provided with" that may appear should be understood in a broad sense. For example, the object "provided with" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or an inseparable connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A special-shaped steel formwork structure for rapid construction of segment plant foundation, characterized in that: The mold body (1) comprises a detachable structure, a cover plate (2) is arranged above the mold body (1), and the cover plate (2) is a structure for fixing a plurality of embedded bolts; The mold body (1) comprises an upper mold (3) and a lower mold (4); the upper mold (3) and the lower mold (4) are connected via a gradient portion (5); and the cross-sectional area of ​​the upper mold (3) is smaller than the cross-sectional area of ​​the lower mold (4).

2. The special-shaped steel formwork structure for rapid construction of segment plant foundation according to claim 1 is characterized in that: The upper mold (3) and the lower mold (4) are both rectangular structures.

3. The special-shaped steel formwork structure for rapid construction of segment plant foundation according to claim 1 is characterized in that: The embedded bolts penetrate the cover plate (2).

4. The special-shaped steel formwork structure for rapid construction of segment plant foundation according to claim 1 is characterized in that: Two cover plates (2) are provided, and each cover plate (2) has nuts on both upper and lower sides, the nuts being threadedly connected to the embedded bolts, and the cover plates (2) are fixed in position by the two nuts.

5. The special-shaped steel formwork structure for rapid construction of segment plant foundation according to claim 1 is characterized in that: A plurality of vibration holes (6) are provided on the gradient portion (5).

6. The special-shaped steel formwork structure for rapid construction of segment plant foundation according to claim 1 is characterized in that: The mold body (1) comprises a front half and a rear half, each of which occupies half of the mold body (1) and is connected via a locking device.

7. The special-shaped steel formwork structure for rapid construction of segment plant foundation according to claim 6 is characterized in that: The front half and the rear half are both L-shaped structures.

8. The special-shaped steel formwork structure for rapid construction of segment plant foundation according to claim 6 is characterized in that: The locking device comprises an expansion plate (7) fixedly connected to the front half and the rear half respectively, and the two expansion plates (7) are detachably connected to each other.

9. The special-shaped steel formwork structure for rapid construction of segment plant foundation according to claim 8 is characterized in that: The two expansion plates (7) are connected via a bolt group.

10. The special-shaped steel formwork structure for rapid construction of segment plant foundation according to claim 1 is characterized in that: Lifting ears are installed on both sides of the mold body (1).

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